1997 Senior Seminar Symposium

• Tentative Senior Seminal Schedule
• Alphabetical list of authors
• Biochemistry Abstracts
• Biology Abstracts
• Chemistry Abstracts
• CIS Abstracts
• CS Abstracts
• Math Abstracts

TENTATIVE SENIOR SEMINAR SYMPOSIUM SCHEDULE

Alphabetical list of authors

Biochemistry Abstracts

Speaker:Melissa Serenil
Candidate for a Bachelor of Science Degree in Biochemistry
Day: Friday
Time: 4:30 PM
Place: LIB 203
Supervisor: Dr. Eamonn Healy
Title: Determination of Enzymatic Activity of Commercial Lactase Supplements.
Abstract: Lactase is an intestinal brush-border enzyme which splits lactose, milksugar, into its component sugars glucose and galactose. Individuals who are unable to digest dairy products or food made with dairy products have a condition known as lactose intolerance (LI) in which the individual has little or no activity of lactase. Fortunately pharmaceutical companies have accommodated LI people with lactase enzyme supplements containing beta-d-galactosidase derived from yeast. We utilize a methodology using an ester derivative sugar, p-nitrophenyl beta-d-galactopyranoside (PNPG) as a substrate to colorimetrically determine the activity of the enzyme beta-d-galactosidase (derived from Aspergillus Oryzae.) The activity of the enzyme is a measurement of initial velocity under conditions which ensure maximum velocity (excess PNPG). The hydrolysis of PNPG yields the products galactose and p-nitrophenol. This methodology allows for determination of the relative activity of commercial lactase supplements.

Speaker:Kevin Wilson
Candidate for a Bachelor of Science Degree in Biochemistry
Day: Saturday
Time: 2:00 PM
Place: LIB 203
Supervisor: Dr. Eamonn Healy
Title:
Abstract: Restless Legs Syndrome (RLS) as described by the International Restless Legs study Group is characterized by paresthesias and/or irresistible need to move the legs. The etiology of RLS is currently unknown. Reports have been made stating a relationship between RLS and serum iron deficiency. We intend to investigate the validity of this claim. Current methods of detection for iron levels are time consuming and costly. These methods include titrations to a timed end point. This methodology requires a separate assay for each cation. Through capillary electrophoresis (CE) we are capable of measuring iron values to the ppb level. CE has the following advantages: efficiencies on the order of capillary gas chromatography, requiring only minute amounts of sample, and is easily automated for precise quantitative analysis and ease of use. We have modified this methodology to provide for quantitative analysis of serum iron levels in restless legs syndrome patient's blood samples. CE should provide the following advantages: detection at ppm and even ppb concentrations, accurate and reproducible quantitation based on peak area, use of an extremely rapid technique capable of easy automation.

Biology Abstracts

Speaker:Jennifer Anderson
Candidate for a Bachelor of Science Degree in Biology
Day: Friday
Time: 2:45 PM
Place: FH 101
Supervisor: Dr. William J. Quinn
Title: The Effects of Decreased Serotonin Levels on Violent or Aggressive Behavior Problem Statement: What is the effect of decreased serotonin levels on violent or aggressive behavior?
Abstract: In the long-running debate of nature versus nurture, the relative importance of environmental factors and genetic factors in shaping violent or aggressive behavior have been studied in depth. Recent research indicates that the neurotransmitter serotonin affects this type of behavior. Serotonin has long been suspected of having an inhibitory effect on aggressive behavior and researchers have hypothesized that violent individuals should be characterized by low levels of serotonin. This seminar will focus on the results of several studies which show a negative correlation between 5-hydroxyindoleacetic acid (a serotonin metabolite) concentrations and violent or aggressive behavior.

Speaker:Jennifer Ansell
Candidate for a Bachelor of Science Degree in Biology
Day: Friday
Time: 5:15 PM
Place: FH 210
Supervisor: Dr. Jimmy Mills
Title: Venom Detoxification and Thioredoxin
Abstract: Thioredoxin, a protein with an active disulfide group, has recently been found to be involved in the reduction of intramolecular disulfide bonds. Thioredoxin and glutaredoxin have been extensively studied for their role as Hydrogen donors for ribonucleotide reductase. Further studies show that thioredoxin reduced by NADPH acts as a specific reductase of snake, bee and scorpion venoms by reducing the disulfide bonds. Most venoms have homologous 1/2 cystein residues and upon reduction of the disulfide bonds the venom is rendered non-toxic. The best known venom is phospholipase A2 and has been reported in snake, scorpion and bee venoms. The loss of neurotoxic activity accompanying reduction raises the possibility that venoms may be detoxified by thioredoxin.

Speaker:Javier Castillo
Candidate for a Bachelor of Science Degree in Biology
Day: Saturday
Time: 2:00 PM
Place: FH 101
Supervisor: Dr. William J. Quinn
Title: Attracting insects to the webs of the common garden spider, Argiope aurantia.
Abstract: Current research regarding spider webs and their morphology has concluded that derived aerial web-weaving spiders (superfamily Araneoidea) produce catching silks that selectively reflect ultraviolet light (320-400 nm). This is a characteristic that is found in the primitive superfamily (Deinopoidea), but has been modified by the Araneids at the molecular level to make prey capture by spider webs more efficient. The two main factors that affect prey capture by spider webs are the ability of the web to absorb kinetic energy of prey impact (web density) and the ability of the webs to intercept prey (web visibility, including UV-reflectance since insects are able to see UV light). Experimental and field tests have shown that there is a correlation between the three and all are a function of the amount of biomass the spiders will consume per energy input in capturing prey. In addition, the common garden spider, Argiope aurantia, has adapted a unique foraging strategy in which both UV-reflecting and non-UV-reflecting silks are spun on the same web. Argiope decorate their webs with UV-reflecting silk zig-zags known as stabilimenta, while the rest of the web does not reflect UV light. The function of UV-reflecting stabilimenta is to attract insects using the same strategy the UV-reflecting designs on flowers attract pollinating insects.

Speaker:Aldolfo DeLeon
Candidate for a Bachelor of Science Degree in Biology
Day: Saturday
Time: 9:45 AM
Place: FH 210
Supervisor: Dr. Steve Taber
Title: Combination Treatments for Rheumatoid Arthritis
Abstract: There are different ideas regarding the most effective treatment of rheumatoid arthritis. One view is that single-drug treatments are best. Another view is that combination (multiple-drug treatments are best. I tested the hypothesis that multiple-drug treatments are best. Methtrexate (MTX) and azathioprine (AZA) are two Food and Drug Administration (FDA) approved, disease modifying antirheumatic drugs (DMARDs) that were searched in the literature through MEDLINE (1966-96). The original hypothesis stated that the combined treatment of MTX and AZA would provide more remitive occurrences on disease progression and no additional toxicity compared with those of the same drugs used singly in the treatment of rheumatoid arthritis. Through evaluation of four studies, done specifically on these drugs, it was found that the combination of MTX and AZA is not always more effective than methotrexate given singly. Two of these studies suggested that patients responded better to methotrexate alone than to a combination, although the differences were not significant. In addition, there was a trend toward decreased radiologic progression in patients treated with MTX. In another study, disease suppression was superior in nearly every variable example, grip strength in patients receiving the combination treatment showed highly significant improvement compared with methotrexate alone. In each study analyzed, it was evident that azathioprine administered singly showed significantly less efficacy than methotrexate alone or in combination. Given such results, the hypothesis would therefore be modified to state that the combination of MTX and AZA will not always be more effective than methotrexate administered alone. Future studies must have a more efficient experimental design in the treatment of rheumatoid arthritis (RA), including higher dosages of the drugs accompanied with a longer duration of study.

Speaker:Annette Garza
Candidate for a Bachelor of Science Degree in Biology
Day: Friday
Time: 5:15 PM
Place: FH 101
Supervisor: Dr. Fidelma O'Leary
Title: Cellular and Molecular Approaches to the Promotion of Neurite Regeneration in Lesioned Spinal Cord
Abstract: There are approximately 250,000 Americans living with spinal cord injuries and many of these injuries result in paralysis. Many experiments have been conducted to shed light on the mechanisms involved in neuronal re-growth. Implants, such as Schwann cells, collagen and carbon filaments have been used to promote neurite regeneration in the lesioned spinal cord. A variety of neurotrophic factors (NT-3, BDNF, NGF, and IN-1) have also been used. All of the neurotrophic factors stimulated robust ingrowth of spinal neurites when injected into the lesion site, but NT-3 with IN-1 had the most effective results. Success was also achieved using implants, which allowed the neurons to cross the implants and continue growing to the distal side to the lesion. In addition, Schwann cell implants had the most promising results since they promoted more rapid regeneration in addition to achieving myelination. These results are paving the road for regeneration of neurons in the lesioned spinal cord of humans, so that maybe one day there will be an effective treatment for paralysis.

Speaker:Laurel Hartung
Candidate for a Bachelor of Arts Degree in Biology
Day: Saturday
Time: 9:00 AM
Place: FH 101
Supervisor: Scott Stewart
Title: Territorial Behavior in Damselfish: What are the Reasons for and Results of Territoriality in Damselfish?
Abstract: Male damselfish (Family Pomacentridae) display stereotypical territorial behaviors. After establishing a territory, the male damselfish defends it vigorously. Defense behaviors vary with intrusion of conspecifics and other organisms, as well as during spawning and nesting. Results presented are based on personal observations in the Sea of Cortez and published data for damselfish of several different species. Behaviors such as chasing, feeding, mating, reactions to juveniles, and agonistic displays will be discussed. Reproduction, territory quality and competition strongly influence territorial behavior in damselfish.

Speaker:Brian Kateb
Candidate for a Bachelor of Arts Degree in Biology
Day: Friday
Time: 4:30 PM
Place: FH 101
Supervisor: Dr. Fidelma O'Leary
Title: The effects of Chromium Supplementation on Body Composition.
Abstract: Chromium picolinate is a dietary supplement which stimulates the chromium ion, s bioactivity, meaning that, it can be viewed as a transport form for chromium expediting its absorption and intracellular uptake. Chromium, an essential trace element, has been implicated as a cofactor with insulin in the maintenance of normal metabolism. Chromium potentiates insulin to be absorbed by sensitizing receptor muscle tissue. Insulin stimulates the uptake of glucose and amino acids into muscle cells which enhances the anabolic processes of muscle tissue and inhibits enzymes that catabolize amino acids and protein in muscle cells. Insulin levels influence the hypothalamus satiety center by promoting appetite control and thermogenisis (Trent and Thieding 1995). It is hypothesized that chromium deficiency may lead to insulin resistance and associated dysfunction in carbohydrate, protein, and lipid metabolism (Hasten, Rome, Franks and Hegsted 1992). For these reasons, it has been suggested that chromium supplementation, in conjunction with exercise, would increase muscle mass and decrease percent body fat. Initial studies strongly support this relationship of chromium supplementation enhancing muscle mass and promoting body fat-loss. However, more recent studies indicate no relationship between increasing muscle mass and body fat-loss due to chromium supplementation. An analysis of these studies will be discussed to determine whether supplementation of chromium picolinate effects body composition.

Speaker:Kristina Lanuza
Candidate for a Bachelor of Science Degree in Biology
Day: Saturday
Time: 9:45 AM
Place: FH 101
Supervisor: Dr. Jimmy Mills
Title: Acomastylis rossii: Patterns of Carbohydrate Distribution in the Alpine Tundra
Abstract: Acomastylis rossii, a rhizomatous member of the rose family, was collected over a growing season in the alpine tundra. The field site is part of the Mountain Research Station which is co-managed by the University of Colorado and the U.S. Department of Forestry. Ten plants were gathered on three dates over the summer of 1996. The field site was divided into three areas along a moisture gradient on the tundra slope. Glucose, sucrose, and starch were extracted from each of the four plant parts, leaves, flowers, rhizomes, and fibrous roots. Carbohydrate accumulations were quantified and averages taken. Accumulations were found to vary among the plant parts as the summer growing season progressed. Acomastylis found in the driest of the field sites utilized its carbohydrate reserves faster than Acomastylis found in the wetter of the field sites. Growing seasons in each of the field sites varied according to the time of collection. Latter collection times allowed for the melting of snow and the evaporation of water. The loss of moisture corresponded to the conversion of the plant to storage mode in which mean starch reserves were larger than mean free carbohydrate reserves.

Speaker: Eva Mackey
Candidate for a Bachelor of Science Degree in Biology
Day: Saturday
Time: 10:45 AM
Place: FH 101
Supervisor: Dr. Fidelma O'Leary
Title: NESTING BIOLOGY OF BICYRTES FODIENS (HYMENOPTERA: SPHECIDAE)
Abstract: The nesting biology of many genera of sphecid wasps has been widely studied. However, there remain gaps in our knowledge of the digger wasp, Bicyrtes fodiens. The purpose of this study was to fill in these gaps and gain new and comparative information on Bicyrtes. Field studies were conducted on wasps at two sites during May-June 1995. These localities were Brackenridge Field Laboratory in Austin, and Pedernales Falls State Park, Blanco County, Texas. Wasps and nests were diagnostically marked and followed over a four week period. Data on nest architecture, nest provisioning, nest longevity, prey selection, male behavior, and cocoon structure were recorded. The observed behavior for Bicyrtes fodiens will be compared with that of other sphecid wasps. The observations will also be compared with published studies on several species of Bicyrtes conducted at Blackjack Creek, Pottawatomie County, Kansas. The only discernible difference between the present study and the published ones concerns the number of cells per nest. In Texas, nests contain up to 15 cells, whereas previous studies reported a maximum of 5-7 cells per nest.

Speaker:Corey Magliolo
Candidate for a Bachelor of Science Degree in Biology
Day: Friday
Time: 3:30 PM
Place: FH 101
Supervisor: Dr. William J. Quinn
Title: Amyloid b-Protein induces the Cerebrovascular Cellular Pathology of Alzheimer's Disease and Related Disorders
Abstract: One of the hallmark pathologic characteristics of Alzheimer's disease (AD) and related disorders is deposition of the 39-42 amino acid amyloid b-protein (Ab) in the walls of cerebral blood vessels. The cerebrovascular Ab deposits in these disorders are associated with degenerating smooth muscle cells in the vessel wall which have been implicated in the expression of the amyloid b-protein precursors (AbPP) and formation of Ab. The Ab precursor protein has been hypothesized to play an important role in the establishment of synaptic connection. Establishing primary cultures of human cerebrovascular smooth muscle cells as a model for investigating the cellular pathologic processes involved in the cerebral amyloid angiopathy of AD and related disorders. Recently, it has been have shown that Ab1-42, the predominant pathologic cerebrovascular form of Ab, causes extensive cellular degeneration that is accompanied by a striking increase in the levels of cellular AbPP, potentially amyloidogenic carboxyl terminal AbPP fragments, and soluble Ab peptide in the cultured human cerebrovascular smooth muscle cells. Together, these studies provide evidence that Ab contributes to the onset and progression suggests the mechanism involves a molecular cascade with a novel product precursor relationship that results in the adverse production and accumulation of Ab.

Speaker: Maureen McConnell
Candidate for a Bachelor of Arts Degree in Biology
Day: Saturday
Time: 9:00 AM
Place: FH 210
Supervisor: Mr. Michael Scioli
Title: "Analysis of animal experimentation results regarding regeneration of tissue of the central nervous system in order to develop a method viable for human CNS tissue regeneration"
Abstract: Tissue of the human central nervous system does not undergo regeneration following injury. The medical consequences pertaining to the absence of posttraumatic nervous system tissue regeneration in mammals are severe and great in number. Treatment that fosters functional nerve and axon regeneration across spinal cord transection in humans does not currently exist.

However, regeneration of tissue following injury to the central nervous system has been demonstrated in preliminary results of experimentation with the sciatic nerve in mice and optic nerve in rabbits. Results include the regaining of partial movement in the hind limbs of rats whose spinal cords were transected and the tissue replaced from other areas. Irradiation treatments have also been utilized in experimentation and been shown to prevent tissue degeneration around the site of injury or lesion to the central nervous system. Using such results, neurobiologists hope to develop a method that allows for the prevention of CNS tissue degeneration in humans following injury, and also promotes the regain of limb use in humans suffering from paralysis due to prior damage to tissue of the central nervous system.

Speaker:Lilia Perez
Candidate for a Bachelor of Arts Degree in Biology
Day: Saturday
Time: 10:45 AM
Place: FH 210
Supervisor: Dr. Jimmy Mills
Title: A comparison of Experimental Treatments in Vitiligo
Abstract: Vitiligo is a skin disorder characterized by white patches on the skin resulting from the progressive loss of pigmentation. Currently there is no cure for the condition. The development of the disease will be discussed along with theoretical causes. Current methods of treatment include repigmentation (PUVA and melanocyte) therapy, depigmentation therapy, tar therapy, nutritional therapy, and sunscreen/cosmetic therapy. This seminar will compare these treatments, and make recommendations for the best method of therapy.

Speaker:Lori Richards
Candidate for a Bachelor of Science Degree in Biology
Day: Friday
Time: 2:45 PM
Place: FH 210
Supervisor: Dr. Fidelma O'Leary
Title: The Interaction of Arginine Vasotocin and Gonadal Steroids Promotes Mating Call Behavior in Male Bullfrogs
Abstract: Investigation of reproductive behaviors may serve as an essential component to understanding the current decline in anuran amphibian populations. Vocalizations play a critical role in the reproductive behavior of amphibians. The general function of vocals in male anurans is to bring females and males together for mating. The neurobiological basis of these behaviors has not been elucidated. Research indicates that stimuli initiating such reproductive behaviors involve hormones. Studies to date suggest two main factors are involved: gonadal steroids and neurohormones. This study examined the simultaneous effects of controlled amounts of the gonadal steroid, dihydrotestosterone (DHT), and the neurohormone, arginine vasotocin (AVT), on mating calls in male bullfrogs. The first experiment tested for vocal response in frogs treated with DHT or a placebo pellet. DHT treated frogs did not significantly increase mating call frequency or decrease call latency in male bullfrogs, compared to placebo pellet. The second experiment involved the frogs from experiment one to test the vocal response in frogs treated with intraperitoneal injections of AVT or saline. AVT significantly increased mating call frequency and decreased call latency in DHT treated male bullfrogs, compared to placebo pellet and saline injection. This suggests that the interaction of androgens (testosterone and DHT) with AVT may serve as a necessary component to facilitate reproductive behaviors.

Speaker:Amanda Smith
Candidate for a Bachelor of Science Degree in Biology
Day: Friday
Time: 3:30 PM
Place: FH 210
Supervisor: Dr. Jimmy Mills
Title: The Effect of Estrogen Supplements on the Memory Impairment Associated with Alzheimer's Disease in Postmenopausal Women
Abstract: Alzheimer's Disease (AD) is the most common form of dementia. The cause(s) of AD are not known and are currently receiving intensive scientific investigation. Scientists are applying research techniques in molecular genetics, neurology, and biochemistry in order to discover the cause(s) of AD. Presently, there is no effective treatment for the memory impairment associated with AD. However, recent research indicates that estrogen supplements may prevent AD or improve the cognitive function in postmenopausal women with this disease. This seminar will discuss the results of several studies linking estrogen to the improved cognition in postmenopausal women with AD and suggest reasons why estrogen may improve the memory in these women.

Speaker: Lora Talley
Candidate for a Bachelor of Science Degree in Biology
Day: Saturday
Time: 1:15 PM
Place: FH 101
Supervisor: Dr. Fidelma O'Leary
Title: Intracellular injection of adenosine 3', 5'-monophosphate (cAMP) evokes long-term facilitation in Aplysia through a reduction of neuronal potassium currents via a mechanism that requires a new protein synthesis.
Abstract: Gaining an understanding of the cellular events that underlie learning and memory is a major focus area of neuroscience today. Much of our knowledge of cellular mechanisms has been gained through research using an animal with a simple nervous system, Aplysia californica. Aplysia exhibits a simple for of learning known as sensitization. Sensitization is the enhancement of a reflex response to one stimulus as a result of the presentation of another stimulus. The tail sensory neurons of Aplysia, which mediate its tail withdrawal defense mechanism have been found to be the center of cellular changes in both long-term(hours) and short-term(minutes) sensitization. A correlate of sensitization is facilitation of the synapse between sensory neurons and motor neurons that mediates its behavior. Sensitization training has been shown to elevate intracellular levels of cAMP in tail sensory neurons. Intracellular injection of cAMP has been used to imitate long-term sensitization. The increase of cAMP through intracellular injection shows strong correlations in cellular changes to sensitization. Intracellular injection of cAMP mimics many of the cellular effects of long-term sensitization training. Increasing levels of cAMP through intracellular injection in sensory neurons in the absence of training is sufficient to mimic many of the correlates of sensitization training. The present study examines both the effects of elevated levels of cAMP in sensory neurons, and the cellular mechanisms subsequently induced, which contribute to synaptic facilitation.

Speaker:Trung Thai
Candidate for a Bachelor of Arts Degree in Biology
Day: Friday
Time: 4:30 PM
Place: FH 210
Supervisor: Mr. Mike Scioli
Title: Aggression Gene
Abstract: Aggressive behavior in humans and mice has been shown to be linked to a deficiency in monoamine oxidase A (MAOA), a critical enzyme responsible for the degradation of biogenic amines like serotonin, norepinephrine, and dopamine. Genetic and metabolic studies of the MAOA structural gene have been done on a large Dutch family and on mice.

A point mutation in the MAOA structural gene in a large Dutch family is associated with aggressive behaviors which include impulsive aggression, arson, attempted rape, and exhibitionism. This genetic defect in affected males is an X-linked disorder occurring on the p11-p21 (short arm) region of the X chromosome. Studies have shown altered metabolism of biogenic amines in affected males. Urine analysis of affected males has also revealed disturbances in MAOA metabolism.

An animal model of MAOA deficiency has been created in transgenic mice. Transgene integration has caused a deletion in the gene encoding MAOA. Disturbances in MAOA metabolism are evident in this line of transgenic mice. Serotonin concentrations increased up to ninefold in pup brains, and norepinephrine concentrations increased up to twofold in pup and adult brains. Observations of altered behaviors in pup male mice included trembling, difficulty in righting, and fearfulness. Adult male mice displayed abnormal behaviors, primarily enhanced aggression.

Speaker:Vasu Vishnampet
Candidate for a Bachelor of Science Degree in Biology
Day: Saturday
Time: 11:30 AM
Place: FH 101
Supervisor: Mr. Michael Scioli
Title: Is there a link between the presence of Helicobacter pylori bacteria, MALT lymphoma and B-Cell clonality.
Abstract: Mucosa Associated Lymphoid Tissue (MALT) is a precursor to gastric MALT lymphoma. Recently performed clinical research indicates a link between the presence of MALT lymphoma and Helicobacter pylori infection. However, it is still unknown how the bacteria triggers the lesion and if there is an identifiable link to the pre-neoplastic stage. Therefore, the question is whether an other agent or mechanism, such as B-cell clonality, plays a role in the genesis of MALT lymphoma. My discussion will develop from the discovery of this bacterium, to analyzing previous studies that reveal the link between the infection and MAlT lymphoma. It will then produce evidence that B-cell clonality is unexpectedly frequent in patients with dyspepsia, regardless of the presence of H. pylori bacteria infection. The discussion will then conclude by raising the possibilities that agents and mechanism other than H. pylori may be involved in the genesis of MALT lymphoma.

Speaker:Christiaan Webb
Candidate for a Bachelor of Science Degree in Biology
Day: Saturday
Time: 11:30 AM
Place: FH 210
Supervisor: Dr. William J. Quinn
Title: Rate and incidence of capsular contracture: A comparison between smooth and textured silicon breast implants.
Abstract: Silicone breast prostheses have been implanted in more than two million women for breast augmentation or reconstruction. However, one persistent complication -- capsular contracture -- results in dissatisfaction and even deformity among patients. Capsular contracture, which can cause firmness in breasts augmented with silicone breast implants, is a serious problem resulting from several factors that ultimately lead to the development of scar tissue.The rate of contracture can be reduced by using implants with a textured surface. Such a surface leads to fibroblast ingrowth into interstices, preventing micromotion at the host prosthesis interface and producing a thinner capsule.

In this seminar, a comparison of incidence of contracture in patients with smooth and textured double lumen silicone implants will be presented. 165 smooth implant patients and 63 textured implant patients were included in a 4 year study.

All patients underwent bilateral aesthetic augmentation performed by the same surgeon. Of the 165 smooth implant patients, 74 (44.8 percent) experienced contractures requiring treatment (greater than Baker II). Of the 63 patients with textured implants, 4 (3.3 percent) experienced symptomatic contracture (greater than a Baker II) requiring further treatment. The reasons for these differences, and their consequences, will be discussed.

Chemistry Abstracts

Speaker: Becky Cole
Candidate for a Bachelor of Liberal Studies Degree in Chemistry
Day: Saturday
Time: 9:45 AM
Place: LIB 203
Supervisor: Dr. Eamonn Healy
Title: DETERMINING PRIMARY STRUCTURE OF PROTEINS USING HPLC
Abstract: This research project addresses a methodology for determining the composition and sequence of amino acids contained in an unknown polypeptide. It incorporates the use of an enzymatic digestion of amino acids in an unknownpolypeptide using Carboxypeptidase A, derivatization of the resultant amino acid using 9-Fluorenylmethyl Chloroformate and subsequent identifcation of the amino acid by high performance liquid chromatography (HPLC). This method provides a straightforward, reliable and inexpensive means of determining amino acid sequence which can be easily incorporated into an undergraduate Biochemistry curriculum.

Speaker:Kenneth Free
Candidate for a Bachelor of Arts Degree in Chemistry
Day: Friday
Time: 5:15 PM
Place: LIB 203
Supervisor: Dr. J.D. Lewis
Title: The Role of Hydrogen Bonding in Structured Assemblies of Molecules
Abstract: Molecular self-assembly processes play an important role in the creation of new materials and in many biochemical phenomena. Hydrogen bonding is often the driving force for the creation of structured self-assemblies of molecules containing both hydrogen-bond acceptors and donors. The tendency of a monomer to self-assemble depends on both the identity of the hydrogen-bond acceptors and donors and their location in the molecule. Infrared spectroscopy, NMR spectroscopy, and X-ray crystallography are frequently used to study the role of hydrogen bond formation of molecular self-assemblies.

Speaker:Juan Garcia
Candidate for a Bachelor of Science Degree in Chemistry
Day: Saturday
Time: 1:15 PM
Place: LIB 203
Supervisor: Dr. Henry Altmiller
Title: Determination of the octane number of gasoline by use of NIR spectroscopy
Abstract: This research was concerned with determining the octane number of gasolines by use of near-IR spectroscopy. The chemical composition and octane number of a finished gasoline are directly related. The near-IR spectral region contains overtones or combinations of carbon-hydrogen stretching vibrations. The absorbance can be directly related to the octane number. Samples were taken from five distinct gasoline companies, and multivariate analysis of the spectra yielded a six parameter equation, e.g., No = K0 + K1 (Al1) + K2 (Al2) + K3 (Al3) + ...Kn (Aln). This equation was calibrated using solutions prepared according to the American Society for Testing and Materials. These solutions contained iso-octane, n-heptane, and toluene. Analysis with this technique requires 2 to 3 cm3 of gasoline, takes about one minute, and it is nondestructive. The equation gives an average standard error of 0.35 of an octane number for unleaded gasoline, when compared with pump label. Likewise, the error was 0.39 for unleaded plus, and 0.41 for super unleaded.

Speaker:Joseph Gonzalez
Candidate for a Bachelor of Arts Degree in Chemistry
Day: Saturday
Time: 9:00 AM
Place: LIB 203
Supervisor: Dr. Henry Altmiller
Title: Determination of Lead in Drinking Water.
Abstract: This project is concerned with the comparison of various methods for the analysis of lead in tap water. The standard method for determining lead is by use of Graphite Furnace Atomic Absorption Spectroscopy. In this research, Flame Atomic Absorption Spectroscopy was used after an extraction and concentration technique was employed. Two methods for determining lead concentrations were investigated. A very selective and highly sensitive spectrofluorimetric procedure for determining lead was developed by Sanz-Medel and Gomis and was used in this research. Results obtained using these two methods will be presented and compared. A photometric determination of lead will be presented also.

Speaker:Veronica Loera
Candidate for a Bachelor of Science Degree in Chemistry
Day: Friday
Time: 3:30 PM
Place: LIB 203
Supervisor: Dr. J.D. Lewis
Title: Intramolecular Hydrogen Bonding in Ortho-Substituted Phenols
Abstract: Infrared spectroscopy has been widely used to study intramolecular hydrogen bonding in unsaturated alcohols including a variety of ortho-substituted phenols. Because of their limited conformational flexibility ortho-substituted phenols provide a popular system for theoretical and experimental investigation of intramolecular hydrogen bonding. Recent theoretical and infrared studies of 2-hydroxybenzoyl compounds indicate their hydrogen bond strengths are primarily dependent on two factors, the hydrogen bond lengths and the oxygen partial charges.

Speaker:Reza Tavakkoli
Candidate for a Bachelor of Science Degree in Chemistry
Day: Saturday
Time: 10:45 AM
Place: LIB 203
Supervisor: Dr. J.D. Lewis
Title: Infrared Studies of Intramolecular Hydrogen Bonding and Molecular Conformations of Substituted Benzyl Alcohols
Abstraact: Infrared spectroscopy has been widely used to obtain information about the minimum energy conformations and presence of intramolecular hydrogen bonding in dilute solutions of alcohols in nonpolar and polar solvents. Infrared studies of the OH stretching region of the alcohols can be used to obtain information about the types of minimum energy conformations of alcohols in these solutions. Specialized solvents such as cyclohexane can often provide more structural information than traditional solvents such as carbon tetrachloride. An important goal of these infrared studies is to identify the types of intramolecular interactions associated with the minimum energy conformations of these alcohols in solution. The FT-IR spectra of 0.01 M solutions 2-, 3-, and 4- fluorobenzyl and chlorobenzyl alcohols in cyclohexane each exhibit two OH stretching bands. The same is true for benzyl alcohol itself and for 3- and 4- bromobenzyl alcohol. However, a third OH stretching band appears in 2-bromobenzyl alcohol that is apparently caused by interaction between the bromine atom and the hydroxyl group.

Speaker:Richard Terry
Candidate for a Bachelor of Science Degree in Chemistry
Day: Saturday
Time: 11:30 AM
Place: LIB 203
Supervisor: Dr. Eamonn Healy
Title: THE BROAD RANGE OF METHODS FOR SEPARATIONS USING CAPILLARY ELECTROPHORESIS
Abstract: Capillary Electrophoresis (CE) is a family of related techniques that use narrow-bore capillaries to perform high efficiency separations of both large and small molecules. These techniques have many advatages. The CE can separate many different molecules, small cations and anions to large macromolecules. The techniques for the large range of molecule separartions will be demonstrated.

Speaker:John Vasquez
Candidate for a Bachelor of Arts Degree in Chemistry
Day: Friday
Time: 2:45 PM
Place: LIB 203
Supervisor: Dr. J.D. Lewis
Title: SPECIALIZED SOLVENT FOR INFRARED AND RAMAN ANALYSIS OF HYDROXYL STRETCHING BANDS
Abstract: General purpose solvents are used to gain spectral information about a wide spectral range whereas specialized solvents focus on a very narrow region of the spectrum. Therefore, specialized solvents can be selected to provide the maximum amount of information for the spectral region being investigated in a particular study. Infrared and Raman studies of hydrogen bonding and molecular conformation of alcohols dissolved in various specialized solvents illustrate the effect of solvent properties on the observed hydroxyl stretching bands. The suitability of solvents for studying hydroxyl stretching spectra can be evaluated on the basis of OH stretching band position, band separation, and relative band intensities for different types of molecular conformations. In contrast to infrared spectroscopy, which has been used extensively for studies of hydrogen bonding in alcohols, Raman spectroscopy has not been widely used for such studies. However, FT-Raman spectra can provide complementary spectral information about the hydroxyl stretching bands of deuterated alcohols. We have investigated C5-C8 hydrocarbons, cyclohexane-d12, CCl4, CH2Cl2 and CS2 as possible solvents for infrared and Raman studies of hydroxyl stretching bands in alcohols.

CIS Abstracts

Originally the organization kept track of its incoming donations manually. The original tracking system was time and energy consuming, subject to miscalculation of donation totals, and had problems with information access and updates.

The donation tracking system is a database system that uses access 95 to improve the original manual donation tracking system. Tables and queries were designed in the system to make sure that all incoming data was recorded and to make it easier for users to update and access information. The database system also calculates the total amount of donations for a specific donation, prints donation summaries, and prints mailing labels. The new system alleviated the problems with the manual tracking system and has proven to be an effective method for keeping track of donations. The donation tracking system provides donation summaries quickly and accurately.

Speaker:Olumide Aluko
Candidate for a Bachelor of Arts Degree in Computer Information Science
Day: Saturday
Time: 1:15 PM
Place: AND 220
Supervisor: Ms. Dawn Cizmar
Title: OSS HUMAN RESOURCE SOFTWARE
Abstract: OSS Consulting, a small business organization (with 35 employees) that contracts services of computer programmers to various companies in Austin wanted an application to maintain general information about their employees personal data. In addition to this, OSS wanted an automated, effective and simple way of keeping track of incoming resumes to facilitate retrieving qualified applicants as needed. A PC-based client/server application was developed to allow adding, modifying, deleting, querying, and printing of applicant and employee data. PowerBuilder 4.0, a graphical user interface (GUI) development tool by PowerSoft was the package used to develop this application. PowerFrame, an application framework library was used to get Windows look and feel and dynamic SQL statements were also used to enhance data retrieval, using the optimal path. This object-based database application has been in use by OSS since December of 1996.

Speaker:Nancy Craven
Candidate for a Bachelor of Arts Degree in Computer Information Science
Day: Saturday
Time: 9:45 AM
Place: AND 220
Supervisor: Dr. Robert Dailey
Title: Allen Bailey and Associates Time and Billing System.
Abstract:: Allen Bailey and Associates is an actuarial consulting firm. Allen Bailey and Associates provides many different services for about fifty different companies. These services are divided into about two hundred different job codes and five different billing codes. The firm employees fifteen people whose knowledge ranges from actuarial science to computer science. Because of this variety each employee is billed to clients at a different rate. This billing procedure creates a complex accounting problem. It requires a system to track the time each employee spends on each job for each company. Furthermore, the system must produce reports which summarize this data. The system has to be efficient so that time is not wasted, given that every wasted minute could cost between $1 to $4. A time and billing system was created in Powerbuilder 5.0. It runs on a Novell Network so that concurrent access is provided. The time and billing system is a menu based system and consists four principal components: employee weekly time input, expense input, reports, code maintenance. This system has been coded and tested and is presently undergoing a trial use period.

Speaker:Laura Cummings
Candidate for a Bachelor of Science Degree in Computer Information Science
Day: Saturday
Time: 9:00 AM
Place: AND 220
Supervisor: Dr. Robert Dailey
Title: Handicapped Equestrian Learning Program (H.E.L.P.)
Abstract: The Handicapped Equestrian Learning Program (H.E.L.P.) is a non-profit organization that provides horse riding lessons to children and adults with physical and/or mental disabilities. The tracking system developed for the H.E.L.P. Center was created using Visual Basic 4.0 for the interface, Microsoft Access 2.0 for the database, and Crystal Reports 5.0 for the report designer.

The database stores information on the clients, such as name, address, and disability. Data is also stored on the date of the lesson, weather, instructor, volunteer(s), horse ridden, client, mood of the client, as well as other information pertaining to the lesson. Special screens have been created to assist the H.E.L.P. Center in adding and updating the information on the clients and the lessons. A reporting screen was also created to allow for client listings to be generated as well as invoice and receipt generation.

The H.E.L.P. Center Tracking System is currently being used by the organization and we will remain in contact to ensure everything is working appropriately.

Speaker:Todd Faulkner
Candidate for a Bachelor of Arts Degree in Computer Science
Day: Friday
Time: 2:45 PM
Place: AND 220
Supervisor: Dr. Laura Baker
Title: Heavy Equipment Scheduling System
Abstract: Capital Rentals is a heavy equipment rental company in Austin, Texas which rents different sized concrete pumps with operators to various job contractors in the surrounding area. The company had a need for a system which could schedule new rentals according to availability, query the current schedule, and allow for overbooking in certain circumstances.. Before the implementation of this new scheduling system, the scheduling was done manually.

To automate this scheduling system a custom-designed, menu-driven application was built using Microsoft Visual Basic 4.0. The database portion of the system allows for additions and deletions from the rental schedule as well as modifications of existing entries. The system performs automatic checking against scheduling problems and runs reports for various time periods upon request. The system made the scheduling more efficient and allowed for less time and manual action on the part of the scheduler.

Speaker:Bradley Hanes
Candidate for a Bachelor of Arts Degree in Computer Information Science
Day: Saturday
Time: 9:00 AM
Place: FH 109
Supervisor: Dr. Laura Baker
Title: "PBX Database"
Abstract: Abbott Laboratories uses Private Branch Exchange (PBX) for their phone system. PBX allows all the phones at Abbott to be connected internally at one central location instead of each phone having a connection with an outside phone company. The database that was in use, Infortext, stored all the phone calls made outside the plant and had a listing of the extensions of all employees. The problem with Infortext was the lack of a user-friendly environment, unreadable format, and the large amount of space it used to store the information. Queries were not easily created and executed in Infortext, which hampered data manipulation. The new database imports the raw data from Infortext and provides buttons for navigation and data manipulation. It solves the problem of unreadability by storing the data in a spreadsheet format. Queries are executed with the click of a button in the new database, which is much more user-friendly. The new software also summarizes the phone calls made per month, which cuts down on the amount of space needed to store the information. The new database solves the problems with Infortext and is more efficient with the data produced by the PBX.

Speaker:Christy Herring
Candidate for a Bachelor of Arts Degree in Computer Information Science
Day: Saturday
Time: 10:45 AM
Place: AND 220
Supervisor: Dr. Robert Dailey
Title: Big Brothers Big Sisters Database of Donor Information
Abstract: Big Brothers Big Sisters is a nonprofit organization similar to a mentor program. They match a child from a single parent family with an adult volunteer who acts as a role model for that child. Being nonprofit, Big Brothers Big Sisters relies heavily on donations for the success of their organization. Given that they have over 500 donors making donations, the organization was in need of an automated system that would store, maintain, and organize their donor information. In addition, there was a need for a variety of reports and the capability to query selected information. In order to automate the necessary functions for Big Brothers Big Sisters, a database management system was designed using Microsoft Access, a relational database management system which stores and retrieves information according to relationships the programmer defines. Data can be presented in a variety of ways including labels, lists, forms, reports, and graphs. Using Microsoft Access Wizards and macros, most tasks can be automated easily without the need for programming. Close consideration was given both to testing the system for accuracy and to future maintenance. The system is scheduled to be in use in early April.

Speaker:Julianna Lindemann
Candidate for a Bachelor of Science Degree in Computer Information Science
Day: Friday
Time: 4:30 PM
Place: AND 220
Supervisor: Mr. John Purvis
Title: Employee and Software Project
Abstract: Data on employees and software is difficult and time-consuming to access. The current method of accessing data on employees and software at the Austin Automation Center was out-of-date. Secretaries were using a typewriter and white-out to make corrections on employee information, while Administrators were arguing over who was in charge of what piece of software. I designed a database in MSAccess and linked the database to Visual Basic with a data control. The program now keeps all employee records and tells what Administrator is in charge of what software. The new method of accessing data on employees is up-to-date as well as easy to access.

Speaker:Monica Martinez
Candidate for a Bachelor of Arts Degree in Computer Information Science
Day: Saturday
Time: 2:00 PM
Place: FH 109
Supervisor: Mr. John Purvis
Title: Tri-Angel Unlimited Database
Abstract: Tri-Angel Unlimited is a nonprofit agency which recruits volunteers to help other members of the community. Every hour volunteered is converted to a Power Point Credit. Those credits can be cashed into obtain the Agency's resources such as classes, equipment and training. The problem faced by Tri-Angel was not able to locate the best volunteer for the job. The employees had to search numerous files and wasted time doing it. They also had a difficult time tracking the hours the volunteers worked which made it hard for the volunteers to fully use the Power Point Project. The solution to her problem was converting her file system into a database. The Tri-Angel Database holds all the volunteer information. Now they are able to delete, add, and modify information. They can search by using the social security number or member id; and run queries based on the volunteer skills and generate reports based on those queries. The database was created using Microsoft Access.

Speaker:Brian Nguyen
Candidate for a Bachelor of Arts Degree in Computer Information Science
Day: Friday
Time: 4:30 PM
Place: FH 109
Supervisor: Dr. Laura Baker
Title: Dynamic Link Libraries (DLL) Tracking System
Abstract: Dynamic Linked Libraries (DLLs) are pre-compiled functions shared and used by programs in the Windows environment. Shared functions save disk space and time. When new functions are added to DLLs, they go through various version numbers during their lifetime. A problem arises when a DLL is added to the system which replaces an existing DLL. If the new DLL is a lower version number than the current DLL version number, a General Protection Fault (GPF) may occur.

General Protection Faults occurred quite frequently on various computer systems at the Public Utility Commission of Texas. A program was implemented to aid in the process of finding the problematic DLL causing the GPF. This program finds the problematic DLL by taking a snap shot of the DLLs that are on the system when the system is deemed stable. When a problem arises the program uses this snap shot to determine what has changed. This program saves software engineer time when adding new software to the system.

Speaker:Connie Vazquez
Candidate for a Bachelor of Arts Degree in Computer Information Science
Day: Saturday
Time: 11:30 AM
Place: FH 109
Supervisor: Mr. John Purvis
Title: Rental Operations System
Abstract: This seminar will discuss the development of a system that will automate the operation processes of The Austin Rent Way (a local equipment rental yard). The system was built using FileMaker Pro 3.0, a Relational Database Management Software Package. It is designed to automate most, it not all of the operations of the Austin Rent Way. The Rental Operations System will allow this business to generate and manage rental contracts, report daily income, manage the availability of their equipment, manage sales on their merchandise, generate billing statements, track client activity, and archive information.

Speaker:Donald Wolfe
Candidate for a Bachelor of Arts Degree in Computer Information Science
Day: Friday
Time: 5:15 PM
Place: FH 109
Supervisor: Ms. Dawn Cizmar
Title: Boys and Girls Club Database
Abstract: The Boys & Girls Club of Austin needed an automated system to track information on their members, sponsors, and volunteers. The clubs in the Austin area currently have 1600 members ages 6-18. Member name and address information, as well as information for the United Way, including age, ethnicity, gender, and zip code is kept at the administrative offices of the club. Background information and donation information is kept for sponsors, and background information and hours worked information is kept for volunteers. An automated system was built to simplify these tasks, and implemented using Microsoft Access. The program allows all information about the members, sponsors, and volunteers to be entered using simple data entry forms. The user can run queries on the information to produce reports on Member age, ethnicity, gender, or combinations. Reports on Sponsor donations, and Volunteer hours can also be created. The program can generate mailing labels for all names stored in the database, search for specific information within the database, and allow for other data manipulations such as searching for emergency contact information.

The program has been in use since December 1996, and while data is still being added to the database, it seems to be working well for the club.

CS Abstracts

Speaker:Liza Amezquita
Candidate for a Bachelor of Science Degree in Computer Science
Day: Friday
Time: 3:30 PM
Place: FH 109
Supervisor: Ms. Dawn Cizmar
Title: Online Interactive Tutorials: Evaluation of the effectiveness and usefulness of a Logic Circuit Tutorial, as a learning aid.
Abstract: In today's high-tech world, there is a demand for educators to expose their students to available computer technology. Unfortunately, the volume of technology available has bombarded educators and left them to search through numerous software products. In order for a software or hardware tool to be introduced in the classroom, its effectiveness and usefulness in the subject area must be evaluated. Educators have frowned upon the use of "technology for technology's sake" and are exploring ways to offer technology which will enhance teaching and enrich learning. To address these issues regarding computer resources as a teaching aid, an interactive online tutorial was designed and developed for an introductory level computing course. Research was then conducted to evaluate the tutorial's effectiveness and usefulness as a learning tool for classroom use. This study reviews the data collection process, the analysis and statistical measure of the data and examines an online interactive tutorial as a supplement to current classroom curriculum.

Speaker:Kerry MacLean
Candidate for a Bachelor of Arts Degree in Computer Science
Day: Saturday
Time: 11:30 AM
Place: AND 220
Supervisor: Dr. Robert Dailey
Title: Introduction of new method of lossless data compression
Abstract: he author will report on the progress of development of an arithmetic coding scheme for data representation. This method, developed by the author, attempts to represent data formulaically, relying on the numerical properties of binary numbers as opposed to repetition of strings of data. Use of this method will provide predictable compression results based on a data file of given length, in addition to the ability to compress all data, whether random-appearing or not.

Speaker:John Perschbach
Candidate for a Bachelor of Science Degree in Computer Science
Day: Saturday
Time: 10:45 AM
Place: FH 109
Supervisor: Mr. John Purvis
Title: What is the best way to size logic devices for custom circuits in a high speed microprocessor?
Abstract: When trying to design a Pentium class micro processer the useof synthesized circuits must be kept to a minimum to maximize performance and reduce die size. Synthesized circuits, that would be considered acceptable in a slower device such as a disk controller or other such embedded processors, must be replaced with fully customized circuits that are optimized for speed. One trade off when designing custom circuits as opposed to synthesized is the loss of automatic sizing. Synthesized circuits that are developed with the aid of Synopsys, an EDA tool, are already sized. These leaves custom circuit designers on their own when it comes to sizing.

Presently there is no standard way at the design center in which I work to do this. The Engineer that most frequently is assigned this task does it manually with a hand held calculator and a set of previously derived algorithms. One attempt to make this an easier task was to implement these algorithms in a Visual Basic program. Although this was a more automated solution ot lacked portability and could not be used on the Sun workstations. One possible sollution that would provide automation and portability would be to rewrite this program in Java. This would allow the program to be run on all operating systems and still have an easy to use GUI thatwas provided by Visual Basic.

Speaker:Alton Pundt
Candidate for a Bachelor of Science Degree in Computer Science
Day: Saturday
Time: 1:15 PM
Place: FH 109
Supervisor: Dr. David Wright
Title: The Effect of Process Sharing on Network Load.
Abstract: Today's companies are looking toward process sharing as a way to replace the buying of larger more expensive machines.Process sharing distrubutes the work load to other machines through a network environment,but as processes are allocated over the network everything slows down. What is the optimization point for a network load to benefit from processing sharing? COMNET III, a performance modeling tool for communication networks was used. A CSMA/CD 10baseT network environment was modeled to incorporate these ideas.

Speaker:Carlos Ruiz
Candidate for a Bachelor of Science Degree in Computer Science
Day: Friday
Time: 5:15 PM
Place: AND 220
Supervisor: Dr. David Wright
Title: Developing dynamic database extractions in a short time at a minimal cost using web technology.
Abstract: The intent of this research is to find the most efficient application or set of tools for developing dynamic database extractions in a short amount of time at a minimal cost using web technology. Additional constraints of this research are that the application or tools should allow the user the option to view the data or request a delimited file. The evaluation aspect of the research will focus on measuring the query response time, the development time, the code size and complexity, and cost for Oracle's WebServer 2.0, a Perl-SQL combination, C with embedded SQL, and the Perl-SAS/Access combination.

Speaker:Jenifer Snowden
Candidate for a Bachelor of Science Degree in Computer Science
Day: Friday
Time: 2:45 PM
Place: FH 109
Supervisor: Mr. John Purvis
Title: Design and Implementation of Web Based Interactive Learning Tools
Abstract: Models of learning indicate that students are more likely to retain materials they see demonstrated rather than what they read or hear during lectures. In addition, they are more likely to understand what they work on themselves versus what they see demonstrated. While the students can "do" the work, how will they know they are "doing" it correctly? The traditional model is for an instructor to grade the work and return it to the student as feedback. However, grading work takes time and faculty are not always available when questions from students need to be answered. In an effort to address these issues, a Web based tutorial was designed and implemented as a learning aide. This interactive tutorial, developed using JavaScript and HTML, explores the features of user interaction by non-science students on elementary gate-level logic. Interactivity on the Web offers an alternative to the traditional way of learning. An interactive tutorial can provide feedback and continuous evaluation which is available at any time. This study explores the research, application, and rapid development of a Web based tutorial to provide an enhanced learning environment for students.

Speaker:Cory Wagner
Candidate for a Bachelor of Science Degree in Computer Science
Day: Saturday
Time: 9:45 AM
Place: FH 109
Supervisor: Mr. John Purvis
Title: Developing the Ideal Bug Tracking System
Abstract: As the technological industry of today grows, we soon learn, both in the industry and in development, that nothing is perfect. Problems appear in all aspects of the field: software, hardware, and documentation. These problems need to be recorded for future reference. Current bug tracking systems are not performing in support sites of industry and developmental areas as expected. Though emphasis at individual support sites may have different concentrations, one general system should be diverse enough to be used by all, also lowering the number of defect applications that would have to be supported by individual sites. By encapsulating many of the features of the current systems, eliminating their downfalls, and by incorporating user input, I feel I have developed the ideal bug tracking system.

Math Abstracts

Speaker:Rebecca Mantsch
Candidate for a Bachelor of Science Degree in Mathematics
Day: Friday
Time: 2:45 PM
Place: FH 106
Supervisor: Bro. David Naples
Title: "Mortality for Sets of 2x2 Matrices"
Abstract: A set of matrices is "mortal" if a product of a finite number of matrices equals the zero matrix. If an algorithm exists which can determine mortality for a given set, then the mortality problem is said to be solvable. It has been shown that for nxn matrices, with n >= 3, the mortality problem is unsolvable. To study the case for n = 2, Mark A. Miller has put restrictions on the set to arrive at a variation of the mortality problem which is solvable. I will describe his algorithm, showing that it is solvable. Additionally, I will introduce and demonstrate my own algorithm, devoloped from a different set of restrictions.

Speaker:Victoria Ortega
Candidate for a Bachelor of Arts Degree in Mathematics
Day: Saturday
Time: 9:00 AM
Place: FH 106
Supervisor: Bro. David Naples
Title: Using Self Similarity to find Length, Area and Dimension
Abstract: "Using Self Similarity to find Length, Area and Dimension" by James T. Sandefur was written in an attempt to make it easier for students to understand geometric series. I will demonstrate models of situations Sandefur presents from which geometric series can be arrived at naturally such as in generating spirals and in the computation of the area of fractals. An advantage to using such models is that the algebraic observation of geometric series becomes graphically obvious. The interplay between these examples of series and their algebraic representation will be shown, as well as how the algebraic use of self-similarity can motivate the concept of fractal dimension. Similarities are used to find the length, area, and dimension of the figures in Sandefer's paper, and I will use the author's methods in finding the fractal of the Menger Sponge.

Speaker:Ana Rivera
Candidate for a Bachelor of Science Degree in Mathematics
Day: Friday
Time: 3:30 PM
Place: FH 106
Supervisor: Dr. Cynthia Trout
Title: A Nonlinear Recurrence Yielding Binary Digits
Abstract: A study of Nonlinear Recurrence Yielding binary digits is presented were Stanley Rabinowitz and Peter Gilbert defined a sequence u(1)=1 and U(n+1)=|_a(u(n) + 1/2_| where n is odd and |_a(u(n) + 1/2)_| when n is even. When u(2n)=|_2^(n-m-1)(2^(m) + w_| then the quantity u(2n+1) -2u(n-1) will always yield binary digits. The purpose of this research is to find three quantities a, b, and c to determine which values will yield binary digits using u(2n+2) - 2u(2n). To attain these values I used the sequence u(n+1) defined by Ming Chien in terms of the three quantities a, b, and c depending on whether n is congruent to 0, 1, or 2 (mod3).

Speaker:Boris Yazlovitsky
Candidate for a Bachelor of Science Degree in Mathematics
Day: Saturday
Time: 9:45 AM
Place: FH 106
Supervisor: Bro. David Naples
Title:
Abstract: Chaos is a phenomenon present in all aspects of nature. Until the development of very fast computers, an in-depth study of chaos was nearly impossible. Chaos deeply affects any study involving numbers. Small-scale events have a much more significant impact on large-scale events than previously suspected. Mathematically, chaotic phenomena manifests in the form of "simple" functions with an unpredictable behavior under certain conditions. A logistic equation of the form x(n+1) = 4x(n)[1 - x(n)] creates an unpredictable chaotic orbit. Such sets are classified as fractals and strange attractors. Chaotic sets have a tendency to have a non-integer (fractal) dimension. Classical methods of studying chaos as well as originally developed methods of creating chaotic data sets and calculating their fractal dimension are presented. Special emphasis is put on the Lorenz, Henon, and Tinkerbell attractors. The effect on the fractal dimension of these sets by two- and three- dimensional maps is analyzed.