668 research outputs found
Ads in mobile applications
No full textThe usage of mobile applications has increased phenomenally with the growth of smart phones. According to Apple, as of Feb 2012, close to 800,000 third party applications were available on the App Store. They have been downloaded more than 15 billion times. The android platform is close behind with 450,000 apps in Google Play that have been downloaded more than 10 billion times. When we look at Advertising revenues from mobile phones (app and browser included), in-app mobile Ads account for only a fraction of the total. IDC estimates 70% of Mobile Ad budgets are spent on search based advertising. The rest is a combination of placements in applications and content on the web. Compared to the application usage statistics for popular platforms, the revenue generated through Ads using these apps as the medium has just not kept pace. The numbers point to a lot of scope for growth. Moreover, with more and more apps becoming free to download, these Ads are here to stay. What makes in-app mobile Ads even more interesting is their potential to deliver highly targeted Ads. In this paper, we study Ads in mobile applications. We limit the scope of our study to in-app mobile Ads, that appear anywhere within a mobile application when it is being used. This could be in the form of text, rich media or banner. Our purpose is to understand how Ads in mobile apps work and how they can be used by advertisers to engage audiences with targeted Ads. To this end, we run Ad campaign experiments in select countries in Asia and North America. Through these experiments; we aim to study the factors affecting the performance of Ad campaigns and inferences that can be made from data obtained through the campaigning processM.S.Includes bibliographical referencesby Aparna Vaikunta
Investigating Speed Deviation Patterns During Glucose Episodes: A Quantile Regression Approach
Get PDFGiven the growing prevalence of diabetes, there has been significant interest in determining how diabetes affects instrumental daily functions like driving. Complication of glucose control in diabetes includes hypoglycemic and hyperglycemic episodes, which may impair cognitive and psychomotor functions needed for safe driving. The goal of this paper was to determine patterns of diabetes speed behavior during acute glucose to drivers with diabetes who were euglycemic or control drivers without diabetes in a naturalistic driving environment. By employing distribution-based analytic methods that capture distribution patterns, our study advances prior literature that has focused on conventional approach of average speed to explore speed deviation patterns.This is a preprint of an article published as Joshi, Aparna, Jennifer Merickel, Cyrus V. Desouza, Matthew Rizzo, Pujitha Gunaratne, and Anuj Sharma. "Investigating Speed Deviation Patterns During Glucose Episodes: A Quantile Regression Approach." arXiv preprint arXiv:2310.02351 (2023). doi:https://doi.org/10.48550/arXiv.2310.02351
Driver Age and Its Effect on Key Driving Metrics: Insights from Dynamic Vehicle Data
Get PDFBy 2030, the senior population aged 65 and older is expected to increase by over 50%, significantly raising the number of older drivers on the road. Drivers over 70 face higher crash death rates compared to those in their forties and fifties, underscoring the importance of developing more effective safety interventions for this demographic. Although the impact of aging on driving behavior has been studied, there is limited research on how these behaviors translate into real-world driving scenarios. This study addresses this need by leveraging Naturalistic Driving Data (NDD) to analyze driving performance measures - specifically, speed limit adherence on interstates and deceleration at stop intersections, both of which may be influenced by age-related declines. Using NDD, we developed Cumulative Distribution Functions (CDFs) to establish benchmarks for key driving behaviors among senior and young drivers. Our analysis, which included anomaly detection, benchmark comparisons, and accuracy evaluations, revealed significant differences in driving patterns primarily related to speed limit adherence at 75mph. While our approach shows promising potential for enhancing Advanced Driver Assistance Systems (ADAS) by providing tailored interventions based on age-specific adherence to speed limit driving patterns, we recognize the need for additional data to refine and validate metrics for other driving behaviors. By establishing precise benchmarks for various driving performance metrics, ADAS can effectively identify anomalies, such as abrupt deceleration, which may indicate impaired driving or other safety concerns. This study lays a strong foundation for future research aimed at improving safety interventions through detailed driving behavior analysis.This is a preprint from Joshi, Aparna, Kojo Adugyamfi, Jennifer Merickel, Pujitha Gunaratne, and Anuj Sharma. "Driver Age and Its Effect on Key Driving Metrics: Insights from Dynamic Vehicle Data." arXiv preprint arXiv:2501.06918 (2025). doi: https://doi.org/10.48550/arXiv.2501.06918
Proton-coupled electron transfer in molecular and material catalysis
Get PDFProton-coupled electron transfer (PCET) plays an important role in a variety of electrochemical and photo-excited reactions occurring in molecular, material, and biological systems. In this thesis, the role of PCET in hydrogen evolution molecular electrocatalysts, and iron-doped nickel-oxyhydroxide thin films used for oxygen evolution reaction, are explored by means of quantum chemistry. Detailed electronic structural analysis performed using density functional theory is used to provide atomic level understanding of these catalytic systems. The electron-proton nonadiabaticity of PCET process is investigated for the phenoxyl/phenol self-exchange reaction, and the results show that the vibronic coupling is dependent on the molecular geometry. This diagnostic is important for the calculation of PCET rate constants. The rate constants and kinetic isotope effects for concerted PCET in a set of hydroquinone derivatives are calculated and analyzed in comparison with experimental data.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-12-01The student, Aparna Karippara Harshan, accepted the attached license on 2018-09-28 at 10:38.The student, Aparna Karippara Harshan, submitted this Dissertation for approval on 2018-09-28 at 12:24.This Dissertation was approved for publication on 2018-10-01 at 09:56.DSpace SAF Submission Ingestion Package generated from Vireo submission #13025 on 2019-02-08 at 11:38:08Made available in DSpace on 2019-02-08T18:39:41Z (GMT). No. of bitstreams: 2
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Regulation of arcuate genes by developmental exposures to endocrine-disrupting compounds in female rats
No full textDevelopmental exposure to endocrine-disrupting compounds (EDCs) alters reproduction and energy homeostasis, both of which are regulated by the arcuate nucleus (ARC). Little is known about the effects of EDC on ARC gene expression. In Experiment #1, pregnant dams were treated with either two doses of bisphenol A (BPA) or oil from embryonic day (E)18-21. Neonates were injected from postnatal day (PND)0-7. Vaginal opening, body weights, and ARC gene expression were measured. Chrm3 (muscarinic receptor 3) and Adipor1 (adiponectin receptor 1) were decreased by BPA. Bdnf (brain-derived neurotropic factor), Igf1 (insulin-like growth factor 1), Htr2c (5-hydroxytryptamine receptor), and Cck2r (cholescystokinin 2 receptor) were impacted. In Experiment #2, females were exposed to BPA, diethylstilbestrol (DES), di(2-ethylhexyl)phthalate, or methoxychlor (MXC) during E11-PND7. MXC and DES advanced the age of vaginal opening and ARC gene expression was impacted. These data indicate that EDCs alter ARC genes involved in reproduction and energy homeostasis in females.Peer reviewe
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American Zombielore: Voodoo, Cinema, and the Undeath of Race
Get PDFThis dissertation undertakes a close examination of zombielore in the United States from the early nineteenth century through the 1940s. While many other scholars have engaged with the history and material of zombielore, relatively few have deeply considered the issues of race, rebellion, and revolution at work in such folklore. Born during the Haitian Revolution and brought to Southern plantations by French refugees, early zombielore reflected a fear that "Black magic" could and would be used against white Americans in the struggle for Black liberation. Ethnographic explorations of Haiti, beginning after the U.S. Civil War and continuing through the U.S. military occupation of Haiti (1915-1934), exacerbated popular fascination with the idea of an "authentic monster" and affirmed racist ideology about the dangers of racial integration. Upon their translation to film, Voodoo-zombie narratives often served to reconcile white-guilt over slavery with ongoing racism against African Americans. Exploring the social contingencies and historical vicissitudes that have shaped zombielore, my research is premised on archival studies of folklore and film, and includes close-text analysis of primary materials to argue that the zombie figure in American culture is not only historically racialized, but operates as a symbol of postcolonial memory. Divided into sections on Authenticity and Memory, the dissertation explores the historical development of the zombie figure through the lenses of folkloric and anthropological discourse, postcolonial Gothic literary theory, film analysis, and theories of memory. The history of zombielore illustrates how the zombie gets reanimated and rearticulated at moments of significant social upheaval and racial conflict associated with the end of slavery; with each successive transformation, the zombie accumulates additional connotations that layer upon previous ones. I argue that the American zombie has always been a palimpsest of postcolonial memory, so the idea that there's any one 'authentic monster' -- in Haiti, in Africa, or the U.S. -- ignores how the figure has been constructed not in any one of these places, but between them. Rather than taking a single disciplinary approach, my research brings together theories from Folklore and Film Studies to demonstrate what each disciplinary perspective reveals in light of the other. Unlike other zombie scholarship, this interdisciplinary approach illuminates how the figure has been employed by both dominant and oppressed groups, leading to a theorization of "undeath" as a mnemonic that works in the service of postcolonial imagination. I argue that as our society moves into an increasingly multicultural age, the zombie comes to symbolize a past that refuses to die, or to stay dead
Three essays on the relationship between land conservation and economic development
Get PDFLand degradation is a significant cause of biodiversity loss, food insecurity, and persistent poverty. In this dissertation, I explore how land conservation and conversion policies affect economic development and human welfare. I use current and historical contexts and compile primary data sources to answer this question. I use case studies from both developing and developed countries, and from both land conversion and working land conservation policies.
In the first chapter, I study the effects of forest protected areas (PAs) on surrounding households in a developing country. I use Nepal’s recently established PAs as a case study to see the effects on the households who depend on the forest. I find that PAs reduce household wood collection, but there is no evidence that other household consumption is significantly reduced by the strain of reduced access to forest resources nor that PAs rapidly attracted tourism that increased household welfare in these rural villages.
This analysis of the immediate effects of land conservation policies in Nepal cannot shed light on all the effects of conservation policies, as land and soil quality change takes time. Historical events provide a more complete picture. Thus, my second two chapters study historical land conservation policies in the United States (US).
In my second chapter, I explore the persistent impacts on the environment of the earliest farmland conservation policies in the Great Plains. The 1930s Dust Bowl compelled the federal government to undertake large soil conservation policies; I evaluate the effects of those policies over fifty years. Results show that the Voluntary Acreage Reduction program had beneficial long-term effects, increasing areas planted in grassland and decreasing soil erosion in areas that were previously heavily planted in corn and wheat.
Land conservation policies also include creating and nurturing local institutions for management. In my third chapter, I study what factors affected the speed with which local environmental institutions – the Soil Conservation Districts (SCDs) – were created to improve farmland resource management. I use historical documents to create a dataset on exactly when SCDs were established during the period of 1936-1956. A duration analysis of those data finds that SCDs did rise up more rapidly in places hit hardest by crop failure, but institutional change was slower in areas dominated by farms managed by tenants who did not have legal authority to help create SCDs to help preserve their farms.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-08-01The student, Aparna Howlader, accepted the attached license on 2019-07-01 at 13:43.The student, Aparna Howlader, submitted this Dissertation for approval on 2019-07-01 at 14:26.This Dissertation was approved for publication on 2019-07-03 at 16:59.DSpace SAF Submission Ingestion Package generated from Vireo submission #14122 on 2019-11-26 at 13:04:13Made available in DSpace on 2019-11-26T20:49:19Z (GMT). No. of bitstreams: 2
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