Matching Items (159)
Description
Due to the nature of animals, even domesticated pets, animal scavenging of human remains is an important taphonomic factor. This area of study has, however, been undercounted in the current literature. The purpose of this study was to begin the first step in creating a taphonomic profile for urban / household animal scavenging as distinguishable from manmade tool marks. Using volunteered animals and regularly available tools, alterations were made on beef ribs in order to characterize the distinguishing profiles between the two groups. It was found that animal scavenging alterations, in the short term (20 minutes used in this study) have a distinctly different appearance than tool mark alterations. Animal scavenging has less visible alterations, consistent bite morphology across different species, and symmetrical cut marks along the midsection of the long bones. Ultimately, this study was a successful first step in furthering taphonomic alteration database research across various biomes and conditions.
ContributorsLittle, Cody Lee (Author) / Kobojek, Kimberly (Thesis director) / Falsetti, Anthony (Committee member) / Ball, Becky (Committee member) / School of Human Evolution and Social Change (Contributor) / School of Mathematical and Natural Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
The Impact of Forensic Science on Society examines the relationship between forensic science and society. Before 2009, society believed forensic science to be a important investigative tool. When the National Academy of Sciences released a report in 2009 detailing the issues within forensic science, society's opinion changed. This thesis analyzes factors that influenced the change in the relationship between forensic science and society, specifically focusing on the 2009 report, the CSI effect, the Innocence Project, and the role of the media. It also looks at how we can continue to improve forensic science, as well as how to strengthen the relationship between forensic science and society.
ContributorsDeroin, Shania Waldner (Author) / Kobojek, Kimberly (Thesis director) / Gordon, Karen (Committee member) / School of Mathematical and Natural Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
Forensic anthropologists rely on the validated sex determination methods that utilize post-cranial elements in adult remains, but, recently, research has been conducted to determine adult remain sex using just the skull. Similar research for sub-adult remains is lacking the robustness and validation that adult determination methods possess. This study utilized 20 crania measurements taken from CT scans of child patients with known sexes at the Phoenix Children’s Hospital to investigate if a sex determination method could be produced. The measurements were assessed with a t-Test, Linear Discriminant Analysis, and Principle Component Analysis to determine if sexual dimorphism was detectable and if the predictive model had discriminant power when the sample size was categorized by age. The results revealed that a few measurements were dimorphic, but were not statistically significant to determine the sex of a sub-adult outside of the sample population. Future investigations will remove age group classification to observe if this model can predict age.
ContributorsMani, Mary Rachel (Author) / Ferry, Lara (Thesis director) / Falsetti, Anthony (Committee member) / School of Mathematical and Natural Sciences (Contributor) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
This study examines the utility of diagnostic CT scans as sources of data to quantify facial growth in children. Subadults often suffer facial trauma arising from a variety of circumstances. Pediatric surgeons are then confronted with devising surgical pre- and post-operative strategies that present numerous complications. One of these involves predicting how specific areas of a child's face will change with time. The proliferation of CT scans use in pre-operative planning throughout healthcare provides potential data for addressing many concerns, including those involving facial growth. To add to the burgeoning body of literature focusing on facial growth and provide insight anatomical variation this study used data derived from CT scans from Phoenix Children's Hospital. Quantitative data derived from CTs were used to examine normative growth and develop predictive equations that surgeons can use to visualize facial change for males and female patients.
ContributorsLee, Isaac Jet (Author) / Ferry, Lara (Thesis director) / Falsetti, Anthony (Committee member) / School of Mathematical and Natural Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2018-12
Description
Through the months September-November of 2017 a study was conducted to determine if bees prefer the sunflower, Helianthus annuus, native to Arizona, or a cultivar Helianthus sunflower in an urban environment. The study was executed in a small, controlled urban environment on Arizona State University West campus. Seven identified bee species and forty-nine specimens were collected, of the forty-nine specimens, two bees were reported on the Helianthus cultivar supporting native floral host preferences of native species. Variables such as nectar, pollen, floral color, and floral height were not measured, however, when the floral host genus was maintained wild bees visited the native Helianthus host significantly more yielding a supportive two-tailed p-value of 2.97x10-5. Three trends were identified in correlation with the experiment: 1) Bees foraged on native Helianthus annuus over the Helianthus cultivar, 2) Generalist species were more abundant than specialists on the Helianthus annuus, 3) Honey bees (Apis mellifera) were the most abundant species present. While not considered a trend, low floral diversity and abundance may explain the low diversity of bee species observed on the Helianthus. Floral host and pollinator desynchronization may also have affected bee diversity and abundance. Analysis of bee abundance and diversity support that wild bees may prefer native floral hosts over cultivar floral hosts when the floral genus, temperature, and time was controlled for in an urban environment.
ContributorsDunham, Jocelen Michaela (Author) / Foltz-Sweat, Jennifer (Thesis director) / Sweat, Ken (Committee member) / School of Mathematical and Natural Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2018-12
Description
There are unrealistic expectations of the forensic science discipline by the public today. More specifically about the types of evidence that can be recovered from a fired cartridge casing. The common misconception with the evidence that can be recovered from a cartridge casing is that all three types of evidence: DNA, latent prints, and firearms can be recovered from the same cartridge casing. However, just because some analyses are possible does not mean that they are practical. The definition of possibility is that an event can happen. However, the definition of practicality is not only that it can happen, but that the event should occur to optimize the efficiency of a given task. Through literature review of previous studies as well as experimental data, each discipline (DNA, latent prints, and firearms and toolmark analysis) were evaluated. For the experimental trials, three total experiments were carried out. Experiment one focused on the possibility aspect, so in experiment one the best conditions were simulated to receive a positive result. Experiment two focused on creating conditions that would occur at a crime scene, and experiment three refined those variables to serve as middle ground. After evaluation, each discipline was classified as possible and/or practical. These results were then used to determine practical sequential processing for a fired cartridge casing. After both experimentation and review, it was determined that the best possible sequential processing path for a cartridge casing collected at the crime scene to get the quickest information back is as follows: Firearms, DNA, Latent Prints.
ContributorsKephart, Amanda K. (Author) / Armendariz Guajardo, Jose (Thesis director) / Kobojek, Kimberly (Committee member) / Rex, Scott (Committee member) / School of Mathematical and Natural Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
The culture surrounding death in America is one of science and silence. When possible, death is hidden away from the public view. When exposure to death is unavoidable, it is sensationalized, made into a spectacle. Our dying are put into hospice care, nursing homes, and other hidden spaces, or else they are plastered over the news and internet. So, we get one of two views of death: the sterile, silent death that happens in the presence of medical professionals or the bloody, tragic deaths that are constantly reported across news outlets and social media or sensationalized on entertainment platforms such as movies and video games. Entire genres of television and movies are created on the foundation of bloody deaths and we are exposed to the concept of death constantly.
Despite the consistent coverage of death on a large scale, the average person is not often exposed to death on a personal level in this day and age. The deaths we see on television or in the movies are not typically connected to people with whom we are attached and so we are not required to work through our emotional response and experience. We are afforded the space to be a casual observer in most of the deaths that we see—we do not need the emotional and mental tools to cope with death on a personal level. While this distance from death may be true of the American whole, it is not entirely generalizable. Professionals in select fields are required to deal with death on a much more regular basis than the average person, including, but not limited to, healthcare and forensic professionals. In these professions, death is a fundamental aspect of the job—either as an expected risk or a necessary precursor. These professionals deal intimately with death, its causes, and its effects on a regular basis because of their chose line of work and, in doing so, are regularly exposed to death and other trauma which has the potential to affect them on both a professional and personal level. In doing so, these professionals are required to, as scientists, analyze and record these experiences with death through the lens of objectivity. These professionals are expected to maintain a professional distance while also being required to give an empathetic response to other’s trauma. The potential effect of this secondary trauma on these professionals is only sharpened by the culture of machismo in these science-based fields that prevents many professionals from expressing emotions regarding their job and getting the social support they need from others within their community.
Despite the consistent coverage of death on a large scale, the average person is not often exposed to death on a personal level in this day and age. The deaths we see on television or in the movies are not typically connected to people with whom we are attached and so we are not required to work through our emotional response and experience. We are afforded the space to be a casual observer in most of the deaths that we see—we do not need the emotional and mental tools to cope with death on a personal level. While this distance from death may be true of the American whole, it is not entirely generalizable. Professionals in select fields are required to deal with death on a much more regular basis than the average person, including, but not limited to, healthcare and forensic professionals. In these professions, death is a fundamental aspect of the job—either as an expected risk or a necessary precursor. These professionals deal intimately with death, its causes, and its effects on a regular basis because of their chose line of work and, in doing so, are regularly exposed to death and other trauma which has the potential to affect them on both a professional and personal level. In doing so, these professionals are required to, as scientists, analyze and record these experiences with death through the lens of objectivity. These professionals are expected to maintain a professional distance while also being required to give an empathetic response to other’s trauma. The potential effect of this secondary trauma on these professionals is only sharpened by the culture of machismo in these science-based fields that prevents many professionals from expressing emotions regarding their job and getting the social support they need from others within their community.
ContributorsSandoval, Alicia Rose (Author) / Kobojek, Kimberly (Thesis director) / Watrous, Lisa (Committee member) / School of Mathematical and Natural Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2018-12
Description
The retina is the lining in the back of the eye responsible for vision. When light photons hits the retina, the photoreceptors within the retina respond by sending impulses to the optic nerve, which connects to the brain. If there is injury to the eye or heredity retinal problems, this part can become detached. Detachment leads to loss of nutrients, such as oxygen and glucose, to the cells in the eye and causes cell death. Sometimes the retina is able to be surgically reattached. If the photoreceptor cells have not died and the reattachment is successful, then these cells are able to regenerate their outer segments (OS) which are essential for their functionality and vitality. In this work we will explore how the regrowth of the photoreceptor cells in a healthy eye after retinal detachment can lead to a deeper understanding of how eye cells take up nutrients and regenerate. This work uses a mathematical model for a healthy eye in conjunction with data for photoreceptors' regrowth and decay. The parameters for the healthy eye model are estimated from the data and the ranges of these parameter values are centered +/- 10\% away from these values are used for sensitivity analysis. Using parameter estimation and sensitivity analysis we can better understand how certain processes represented by these parameters change within the model as a result of retinal detachment. Having a deeper understanding for any sort of photoreceptor death and growth can be used by the greater scientific community to help with these currently irreversible conditions that lead to blindness, such as retinal detachment. The analysis in this work shows that maximizing the carrying capacity of the trophic pool and the rate of RDCVF, as well as minimizing nutrient withdrawal of the rods and the cones from the trophic pool results in both the most regrowth and least cell death in retinal detachment.
ContributorsGoldman, Miriam Ayla (Author) / Camacho, Erikia (Thesis director) / Wirkus, Stephen (Committee member) / School of Mathematical and Natural Sciences (Contributor, Contributor) / Barrett, The Honors College (Contributor)
Created2017-05
Description
Irritable bowel syndrome (IBS) is a common gastrointestinal disorder that afflicts more than 20% of the population in the United States. Symptoms include mild to severe abdominal discomfort accompanied by a change in stool character and form ranging from constipation to diarrhea. Additionally, IBS is associated with secondary effects including depression, anxiety, poor quality of life, insomnia and sexual dysfunction. Despite the known association of secondary effects, patients are often tested for potential illnesses that share similar pathological symptoms. This process can be costly and protracted and yet not deliver a completely accurate diagnosis. The aim of this research is to identify gene expression-based biological signatures and unique biomarkers for the detection of IBS. Through the use of quantitative polymerase chain reaction (qPCR), comparison of pooled samples of non-IBS patient-derived RNA were used to identify differentially expressed genes in patients with IBS. Data obtained from preliminary DNA microarray analysis demonstrated a degree of success in differentiating between IBS and asymptomatic patients. Additional comprehensive DNA microarray analyses have led to the identification of a series of 858 differentially expressed genes, including genes associated with serotonin metabolism, which may characterize the IBS pathological state. The microarray results were screened using a combination of gene ontological analysis and qPCR. Real-time PCR revealed repressed levels of tryptophan hydroxylase (TPH1), an enzyme involved in the rate- limiting step in serotonin biosynthesis, in IBS patients relative to controls. Lower concentrations of serum 25(OH)D were also observed among the IBS cohort relative to asymptomatic patients, especially among IBS-D subtype. Vitamin D was shown to modulate differentially expressed genes in IBS patients, suggesting that IBS pathophysiology may involve vitamin D insufficiency and/or an irregularity in serotonin metabolism. Additional qPCR analysis of 32 differentially expressed genes in IBS patients identified 7 putative genetic biomarkers proposed for a potential IBS diagnostic panel. Based on the quality of these results, we may be able to develop, test, and market a diagnostic kit for IBS.
ContributorsGrozic, Aleksandra (Author) / Jurutka, Peter (Thesis director) / Sandrin, Todd (Committee member) / Foxx-Orenstein, Amy (Committee member) / School of Mathematical and Natural Sciences (Contributor) / School of Social and Behavioral Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2017-12
Description
The thesis examines the intricacies involved with the language barriers experienced by patients with Limited English Proficiency (LEP) in medical encounters in the U.S. It examines the evidence showing the impact that language barriers have on both the quality of care and the satisfaction with care experienced by patients with LEP. It also presents an overview of the laws regulating these interactions and its limitations. It further examines the pros and cons of the use of interpreters as the primary strategy developed to operationalize these regulations, including lack of funding for medical interpreters, lack of appropriate training and certification, and language diversity. Additionally, language barriers are examined in the context of cultural differences that permeate all social encounters. One key finding of this review is that communication problems are not only an issue for the LEP population, providing health-care for all patients involve sharing information among multiple health-care providers, patients and their families. However, it is well-documented that LEP makes health-care communication exponentially more challenging. The work concludes with some possible solutions to improve the quality of care and satisfaction of patients with LEP.
ContributorsBrown-Mchone, Carlee Gail (Author) / Vargas, Perla (Thesis director) / Hall, Deborah (Committee member) / School of Humanities, Arts, and Cultural Studies (Contributor) / School of Mathematical and Natural Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05