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- Member of: ASU Electronic Theses and Dissertations
- Member of: ASU Retirees Association (ASURA) Video History Project Interviews
- Member of: Metis Center for Infrastructure and Sustainable Engineering
Description
Bob Francis grew up in Yuma, Arizona and graduated from ASU. After spending a year teaching high school in Yuma, he returned to ASU in 1970, starting in the Alumni Association. After a few years, he moved to the Office of Undergraduate Admissions where he spent most of his career. He retired in 2002.
Important / interesting parts of the interview include:
• The beginning of the Office of Undergraduate Admissions in Part 2
• The changing attitude about the role of the University in marketing itself to students and parents in Part 3
• The role of the Devils’ Advocates played in selling the University in Part 4
• The role Don Dotts and Christine Kajikawa Wilkinson played in Bob’s career in Part 6
ContributorsFrancis, Robert (Bob) (Interviewee) / Mason, Marilyn (Interviewer) / Scheatzle, David (Interviewer) / Arizona State University Retirees Association (Producer)
Created2014-04-17
ContributorsHardt, Ann (Interviewee) / Ludemann, Ruth (Interviewer) / Scheatzle, David (Interviewer) / Arizona State University Retirees Association (Producer)
Created2011-02-22
Description
To address the dearth of knowledge about person-based and trip-level exposure, we developed the Icarus model. Icarus uses mesoscale traffic model—activity-based model—to analyze the heat exposure of regions of interest at an individual level. The goal with Icarus was to design accurate, granular models of population and temperature behavior for a target region, which could be transformed into a heat exposure model by means of simulation and spatial-temporal joining. By combining and implementing the most robust software and data available, Icarus was able to capture person-based exposure with unparalleled detail. Here we describe the model methodology. We use the metropolitan region of Phoenix, Arizona, USA to carry out a case study using Icarus.
ContributorsLi, Rui (Author) / Brownlee, Ben (Author) / Chester, Mikhail Vin (Author) / Hondula, David M. (Author) / Middel, Ariane (Author) / Michne, Austin (Author) / Watkins, Lance (Author)
Description
Arizona State University's Spring 2022 Urban Infrastructure Anatomy course assessed infrastructure challenges for advanced logistics planning in Belmont, Arizona. The Belmont initiative has sought to examine how planning for future advanced logistics technologies and operations should serve as drivers for novel urban planning. The project teams focused on energy systems, transportation systems, agriculture, biomimicry, and heat mitigation.
ContributorsBhandari, Viraj (Contributor) / Mirtich, Laura Christine (Contributor) / Smith, Keegan (Contributor) / AlMarzouqi, Shaymaa (Contributor) / Avaula, Munieswar Reddy (Contributor) / Britton, Britnie (Contributor) / Changela, Meet Haresh (Contributor) / Subramanian, Praveen Raj Kumar (Contributor) / Tatiparthi, Jaya Dinesh Reddy (Contributor) / Pramod, Luke (Contributor) / Guglielmi, Giovanni (Contributor) / Myers, Andrew (Contributor) / Bonham, Emma Eileen (Contributor) / Majety, Naga Venkata Krishna Anjani Kumar (Contributor) / Sripathi, Siva Sai Praneeth (Contributor) / Schoneberger, Channing (Contributor) / Chester, Mikhail Vin (Contributor)
Created2022-06-01
Description
A methodology is presented for synthetic water distribution networks that advances previous methods by Ahmad et al. 2022 (SyNF v1.0). The methodology describes the development changes for v1.1 of the model. This includes major updates to the handling of global variables, parameterization of water treatment plants (WTP) and tanks, and the inclusion of flexibility in handling different demand estimates. The model advancements were designed around true data for San Juan and Mayaguez (Puerto Rico), but are generalizable to other regions.
ContributorsSearles, Ian (Contributor) / Jain, Rajan (Contributor) / Chester, Mikhail Vin (Contributor)
Created2024-07-24
Description
The Fall 2023 Transportation Systems Planning class at Arizona State University analyzed a suite of ADOT plans and reports against the SDGs, assessing where these plans aided in achieving or harmed progress towards these goals. From this analysis, the class proposed recommendations to improve ADOT alignment with the SDGs. The findings and recommendations have been organized in this report.
ContributorsPorto, Mattheus (Editor) / Searles, Ian (Editor) / Wolfinbarger, Robert (Editor) / Apeji, Samuel (Author) / Arthur, Cole (Author) / Aviles, Hirvin (Author) / Banzon, Lana (Author) / Bhagia, Manav Sandeep (Author) / Catanese, Joseph (Author) / Corral, Oscar (Author) / Doyle, Carter (Author) / Duquella, Frederic (Author) / Gallerani, Cecilia (Author) / Gaspar, Maria (Author) / Gomez, Angela (Author) / Hall, Adam (Author) / Hamdan, Amir (Author) / Hermann, Aleksander (Author) / Hunyada, Tyler (Author) / Italo, Marcus (Author) / Jasarevic, Elma (Author) / Jimenez, Mikayla (Author) / Jones, Shepherd (Author) / Lafont, Eliott (Author) / Liu, Brennan (Author) / Mendez Aceves, Carlos (Author) / Nguyen, Sophie (Author) / Nwe, Theint (Author) / Tun Oo, Si Thu (Author) / Varela, Xenia Perez (Author) / Ray, Zachary (Author) / Reames, Isaac (Author) / Rodriguez Ocana, Miguel (Author) / Tang, Fang (Author) / Chester, Mikhail Vin (Author)
Created2024-03-07
Description
Glycosaminoglycans (GAGs) are a class of complex biomolecules comprised of linear, sulfated polysaccharides whose presence on cell surfaces and in the extracellular matrix involve them in many physiological phenomena as well as in interactions with pathogenic microbes. Decorin binding protein A (DBPA), a Borrelia surface lipoprotein involved in the infectivity of Lyme disease, is responsible for binding GAGs found on decorin, a small proteoglycan present in the extracellular matrix. Different DBPA strains have notable sequence heterogeneity that results in varying levels of GAG-binding affinity. In this dissertation, the structures and GAG-binding mechanisms for three strains of DBPA (B31 and N40 DBPAs from B. burgdorferi and PBr DBPA from B. garinii) are studied to determine why each strain has a different affinity for GAGs. These three strains have similar topologies consisting of five α-helices held together by a hydrophobic core as well as two long flexible segments: a linker between helices one and two and a C-terminal tail. This structural arrangement facilitates the formation of a basic pocket below the flexible linker which is the primary GAG-binding epitope. However, this GAG-binding site can be occluded by the flexible linker, which makes the linker a negative regulator of GAG-binding. ITC and NMR titrations provide KD values that show PBr DBPA binds GAGs with higher affinity than B31 and N40 DBPAs, while N40 binds with the lowest affinity of the three. Work in this thesis demonstrates that much of the discrepancies seen in GAG affinities of the three DBPAs can be explained by the amino acid composition and conformation of the linker. Mutagenesis studies show that B31 DBPA overcomes the pocket obstruction with the BXBB motif in its linker while PBr DBPA has a retracted linker that exposes the basic pocket as well as a secondary GAG-binding site. N40 DBPA, however, does not have any evolutionary modifications to its structure to enhance GAG binding which explains its lower affinity for GAGs. GMSA and ELISA assays, along with NMR PRE experiments, confirm that structural changes in the linker do affect GAG-binding and, as a result, the linker is responsible for regulating GAG affinity.
ContributorsMorgan, Ashli M (Author) / Wang, Xu (Thesis advisor) / Allen, James (Committee member) / Yarger, Jeffery (Committee member) / Arizona State University (Publisher)
Created2015
Description
Image segmentation is of great importance and value in many applications. In computer vision, image segmentation is the tool and process of locating objects and boundaries within images. The segmentation result may provide more meaningful image data. Generally, there are two fundamental image segmentation algorithms: discontinuity and similarity. The idea behind discontinuity is locating the abrupt changes in intensity of images, as are often seen in edges or boundaries. Similarity subdivides an image into regions that fit the pre-defined criteria. The algorithm utilized in this thesis is the second category.
This study addresses the problem of particle image segmentation by measuring the similarity between a sampled region and an adjacent region, based on Bhattacharyya distance and an image feature extraction technique that uses distribution of local binary patterns and pattern contrasts. A boundary smoothing process is developed to improve the accuracy of the segmentation. The novel particle image segmentation algorithm is tested using four different cases of particle image velocimetry (PIV) images. The obtained experimental results of segmentations provide partitioning of the objects within 10 percent error rate. Ground-truth segmentation data, which are manually segmented image from each case, are used to calculate the error rate of the segmentations.
This study addresses the problem of particle image segmentation by measuring the similarity between a sampled region and an adjacent region, based on Bhattacharyya distance and an image feature extraction technique that uses distribution of local binary patterns and pattern contrasts. A boundary smoothing process is developed to improve the accuracy of the segmentation. The novel particle image segmentation algorithm is tested using four different cases of particle image velocimetry (PIV) images. The obtained experimental results of segmentations provide partitioning of the objects within 10 percent error rate. Ground-truth segmentation data, which are manually segmented image from each case, are used to calculate the error rate of the segmentations.
ContributorsHan, Dongmin (Author) / Frakes, David (Thesis advisor) / Adrian, Ronald (Committee member) / Turaga, Pavan (Committee member) / Arizona State University (Publisher)
Created2015
Description
Nanoparticle suspensions, popularly termed “nanofluids,” have been extensively investigated for their thermal and radiative properties. Such work has generated great controversy, although it is arguably accepted today that the presence of nanoparticles rarely leads to useful enhancements in either thermal conductivity or convective heat transfer. On the other hand, there are still examples of unanticipated enhancements to some properties, such as the reported specific heat of molten salt-based nanofluids and the critical heat flux. Another largely overlooked example is the apparent effect of nanoparticles on the effective latent heat of vaporization (hfg) of aqueous nanofluids. A previous study focused on molecular dynamics (MD) modeling supplemented with limited experimental data to suggest that hfg increases with increasing nanoparticle concentration.
Here, this research extends that exploratory work in an effort to determine if hfg of aqueous nanofluids can be manipulated, i.e., increased or decreased, by the addition of graphite or silver nanoparticles. Our results to date indicate that hfg can be substantially impacted, by up to ± 30% depending on the type of nanoparticle. Moreover, this dissertation reports further experiments with changing surface area based on volume fraction (0.005% to 2%) and various nanoparticle sizes to investigate the mechanisms for hfg modification in aqueous graphite and silver nanofluids. This research also investigates thermophysical properties, i.e., density and surface tension in aqueous nanofluids to support the experimental results of hfg based on the Clausius - Clapeyron equation. This theoretical investigation agrees well with the experimental results. Furthermore, this research investigates the hfg change of aqueous nanofluids with nanoscale studies in terms of melting of silver nanoparticles and hydrophobic interactions of graphite nanofluid. As a result, the entropy change due to those mechanisms could be a main cause of the changes of hfg in silver and graphite nanofluids.
Finally, applying the latent heat results of graphite and silver nanofluids to an actual solar thermal system to identify enhanced performance with a Rankine cycle is suggested to show that the tunable latent heat of vaporization in nanofluilds could be beneficial for real-world solar thermal applications with improved efficiency.
Here, this research extends that exploratory work in an effort to determine if hfg of aqueous nanofluids can be manipulated, i.e., increased or decreased, by the addition of graphite or silver nanoparticles. Our results to date indicate that hfg can be substantially impacted, by up to ± 30% depending on the type of nanoparticle. Moreover, this dissertation reports further experiments with changing surface area based on volume fraction (0.005% to 2%) and various nanoparticle sizes to investigate the mechanisms for hfg modification in aqueous graphite and silver nanofluids. This research also investigates thermophysical properties, i.e., density and surface tension in aqueous nanofluids to support the experimental results of hfg based on the Clausius - Clapeyron equation. This theoretical investigation agrees well with the experimental results. Furthermore, this research investigates the hfg change of aqueous nanofluids with nanoscale studies in terms of melting of silver nanoparticles and hydrophobic interactions of graphite nanofluid. As a result, the entropy change due to those mechanisms could be a main cause of the changes of hfg in silver and graphite nanofluids.
Finally, applying the latent heat results of graphite and silver nanofluids to an actual solar thermal system to identify enhanced performance with a Rankine cycle is suggested to show that the tunable latent heat of vaporization in nanofluilds could be beneficial for real-world solar thermal applications with improved efficiency.
ContributorsLee, Soochan (Author) / Phelan, Patrick E (Thesis advisor) / Wu, Carole-Jean (Thesis advisor) / Wang, Robert (Committee member) / Wang, Liping (Committee member) / Taylor, Robert A. (Committee member) / Prasher, Ravi (Committee member) / Arizona State University (Publisher)
Created2015
Description
This thesis examines the narratives and meta-commentary of Indonesian users of English about their English as a Second Language (ESL) experiences. It approaches interview data with ten Indonesian second language (L2) speakers of English from a narrative analysis/inquiry perspective. Each interview was transcribed according to a modified set of discourse analysis (DA) transcription conventions, then coded by the researcher. The first research question addressed what linguistic devices members of this population used to achieve cohesion and coherence in their narratives, and the second research question examined how members of this population portrayed their L2 selves in their narratives. The data yielded 21 linguistic devices that fell into three levels of frequency. Connectives, discourse markers, and repetition were by far the most common linguistic devices, followed by adverbials, embedded clauses, intensifiers, and the word like (non-comparison uses), which were somewhat frequent linguistic devices. The data also showed that participants constructed their L2 selves using three main categories: agency, identity, and perceptions of English and the U.S.. In regard to identity, participants invoked membership categorization, where they portrayed their identities in relation to other individuals. The study concludes with suggestions for future research, especially relating to Indonesian L2 users of English.
ContributorsTappendorf, Rebecca C (Author) / Renaud, Claire (Thesis advisor) / Prior, Matthew (Committee member) / Gelderen, Elly van (Committee member) / Arizona State University (Publisher)
Created2015