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Browsing by Subject "Geographic information systems"
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Item Assessing Individuals’ Exposure to Environmental Conditions Using Residence-Based Measures, Activity Location-Based Measures, and Activity Path-Based Measures(Wolters Kluwer, 2019-03) Morrison, Christopher N.; Byrnes, Hilary F.; Miller, Brenda A.; Kaner, Emily; Wiehe, Sarah E.; Ponicki, William R.; Wiebe, Douglas J.; Pediatrics, School of MedicineBackground: Many approaches are available to researchers who wish to measure individuals' exposure to environmental conditions. Different approaches may yield different estimates of associations with health outcomes. Taking adolescents' exposure to alcohol outlets as an example, we aimed to (1) compare exposure measures and (2) assess whether exposure measures were differentially associated with alcohol consumption. Methods: We tracked 231 adolescents 14-16 years of age from the San Francisco Bay Area for 4 weeks in 2015/2016 using global positioning systems (GPS). Participants were texted ecologic momentary assessment surveys six times per week, including assessment of alcohol consumption. We used GPS data to calculate exposure to alcohol outlets using three approach types: residence-based (e.g., within the home census tract), activity location-based (e.g., within buffer distances of frequently attended places), and activity path-based (e.g., average outlets per hour within buffer distances of GPS route lines). Spearman correlations compared exposure measures, and separate Tobit models assessed associations with the proportion of ecologic momentary assessment responses positive for alcohol consumption. Results: Measures were mostly strongly correlated within approach types (ρ ≥ 0.7), but weakly (ρ < 0.3) to moderately (0.3 ≤ ρ < 0.7) correlated between approach types. Associations with alcohol consumption were mostly inconsistent within and between approach types. Some of the residence-based measures (e.g., census tract: β = 8.3, 95% CI = 2.8, 13.8), none of the activity location-based approaches, and most of the activity path-based approaches (e.g., outlet-hours per hour, 100 m buffer: β = 8.3, 95% CI = 3.3, 13.3) were associated with alcohol consumption. Conclusions: Methodologic decisions regarding measurement of exposure to environmental conditions may affect study results.Item Enhancing research on a clinical decision support and geographic information system: getting involved as informationists(Midwest Chapter, Medical Library Association, 2013-10-07) Whipple, Elizabeth C.; Ralston, Rick K.; Odell, Jere D.; Zimmerman, Carly; Liu, Gilbert C.In 2012, the National Library of Medicine (NLM) funded its first ever administrative supplement for informationists. The purpose of these grants is to enhance multidisciplinary basic and clinical research by integrating information specialists (informationists) on research teams in order to improve the capture, organization, and management of biomedical research data. Three informationists at the Indiana University School of Medicine were awarded one of these supplements to work on the Child Health Improvement through Computer Automation (CHICA) system. CHICA is a computer decision support system that interfaces with existing electronic medical record systems (EMRS) and delivers "just in time" patient-relevant guidelines to physicians during the clinical encounter. CHICA-GIS integrates a geographic information system (GIS) with CHICA to refer pediatricians and parents to relevant health services (as needed, for physical activity, dental care, or tutoring) near the patient's neighborhood. The informationists are enhancing the CHICA-GIS system by: improving the accuracy and accessibility of information, managing and mapping the knowledge which undergirds the CHICA-GIS decision support tool, supporting community engagement and consumer health information outreach, and facilitating the dissemination of new CHICA-GIS research results and services. This paper describes the initial process for approaching and collaborating with researchers, writing the grant and getting funded, and progress on the project goals to date.Item Geography: its place in higher education enrollment(2011-03-16) McDonald, Joseph P.; Banerjee, Aniruddha; Dwyer, Owen J.; Ward, Richard E.The fundamental principles colleges and universities use to recruit students have remained largely unchanged for decades. Traditionally, admissions professionals visit high schools and attend college fairs, while colleges and universities hold preview days and publish viewbooks all in the interest of attracting a high-quality and diverse student population. The recruiting process has been greatly improved through the application of modern technology. The analytic abilities of technologies such as geographic information systems (GISystems), which allow for the visualization and analysis of spatial data, presents previously underutilized strategies for higher education recruiting methods. In addition, the incorporation of a Hierarchical Bayesian model will effectively model influential enrollment factors, which successful students possess. Hierarchical Bayesian models use the prior distribution, and likelihood of an events occurrence to create the posterior distribution or Bayesian inference. The intelligence created by combining traditional recruiting techniques with GISystems and Hierarchical Bayesian modeling will allow admissions professionals to improve the success rate of enrollment efforts and expenditures. This paper will explore the application of Hierarchical Bayesian models and GISystems within higher education recruiting.Item Predictive policing : a comparative study of three hotspot mapping techniques(2015-04-21) Vavra, Zachary Thomas; Lulla, Vijay O.; Wilson, Jeffrey S. (Jeffrey Scott), 1967-; Daniel P. (Daniel Patrick), Johnson 1971-Law enforcement agencies across the U.S. use maps of crime to inform their practice and make efforts to reduce crime. Hotspot maps using historic crime data can show practitioners concentrated areas of criminal offenses and the types of offenses that have occurred; however, not all of these hotspot crime mapping techniques produce the same results. This study compares three hotspot crime mapping techniques and four crime types using the Predictive Accuracy Index (PAI) to measure the predictive accuracy of these mapping techniques in Marion County, Indiana. Results show that the grid hotspot mapping technique and crimes of robbery are most predictive. Understanding the most effective crime mapping technique will allow law enforcement to better predict and therefore prevent crimes.Item The role of informationists in delivering geospatial intelligence to health care professionals(National Network of Libraries of Medicine, 2013-10-11) Ralston, Rick K.; Whipple, Elizabeth C.; Odell, Jere D.; Liu, Gilbert C.Three informationists at the Indiana University School of Medicine were awarded NLM supplement to work on the Child Health Improvement through Computer Automation (CHICA) system. CHICA is a computer decision support system that interfaces with existing electronic medical record systems (EMRS) and delivers "just in time" patient-relevant guidelines to physicians during the clinical encounter. CHICA-GIS integrates a geographic information system (GIS) with CHICA to refer pediatricians and parents to relevant health services (as needed, for physical activity, dental care, or tutoring) near the patient's neighborhood. The informationists are enhancing the CHICA-GIS system by: improving the accuracy and accessibility of information, managing and mapping the knowledge which undergirds the CHICA-GIS decision support tool, supporting community engagement and consumer health information outreach, and facilitating the dissemination of new CHICA-GIS research results and services. This presentation describes the initial process for approaching and collaborating with researchers, writing the grant and getting funded, and progress on the project goals to date.Item TREE MITIGATION STRATEGIES TO REDUCE THE EFFECT OF URBAN HEAT ISLANDS IN CENTER TOWNSHIP, IN(2012-12-11) Rigg, Michelle C.; Johnson, Daniel P. (Daniel Patrick), 1971-; Wilson, Jeffrey S. (Jeffrey Scott), 1967-; Bein, Frederick L. (Frederick Louis), 1943-The purpose of this study was to identify urban heat island locations within Center Township, Indiana and to develop a model to determine areas of high social vulnerability. In addition, an urban heat island mitigation strategy was developed for socially vulnerable and highest temperature locations. Land surface temperature was estimated using Landsat ETM+ satellite imagery. Social vulnerability was estimated using principal components analysis and spatial analysis methods such as kernel density functions. These methods incorporate various socioeconomic variables, land surface temperature, and tree canopy cover. Tree canopy cover was extracted using Quickbird imagery among other techniques. Areas with high social vulnerability, high temperature and low tree canopy cover were analyzed and plantable spaces were assessed. The findings of this study will be shared with Keep Indianapolis Beautiful, Inc. so that they can inform their tree planting campaigns that seek to reduce the effects of urban heat islands on socially vulnerable populations.