Digital Commons Network^™

Internal Curing By Sap In Ultra-High Strength Concrete With Cement-Silica Fume-Fly Ash Binder, Jianhui Liu, Caijun Shi, Xianwei Ma

International Conference on Durability of Concrete Structures

Super-absorbed polymer (SAP) is an effective internal curing materials for reducing autogenous shrinkage and improving cracking resistance of ultra-high-strength concrete (UHSC). This study investigated the compressive strength, shrinkage properties of UHSC with cement–silica fume–fly ash binder. The composition of the binder was designed using seven-batch factorial design method. The relationships between the binder composition and the properties were expressed in contours. Results showed that, silica fume could improve the compressive strength and total shrinkage of UHSC. However fly ash reduced the compressive strength and total shrinkage of UHSC to certain extent. On the other hand, under the internal curing of …

Design Of Ternary Blend High-Volume Fly Ash Concrete Mixes Using Hydrated Lime, Chamila Gunasekara, David Law, Sujeeva Setunge

International Conference on Durability of Concrete Structures

The increase of carbon emission due to annual growth of Portland cement (PC) production has enforced research into the development of sustainable green concrete using a range of readily available industrial waste materials. The present study is focused on developing two high volume fly ash (HVFA) concretes with cement replacement levels 65% (HVFA‒65) and 80% (HVFA‒80). Initially, the required lime for both HVFA concrete mixes were determined, and then the optimized mix design identified, based on 28-day strength, by varying the fly ash‒lime combination. The optimized mixes achieved a compressive strength of 53MPa and 40MPa, for HVFA‒65 and HVFA‒80 concretes, …

Compressive Strength, Free Expansion And Shrinkage Of Expansive Concrete Containing Fly Ash, Warangkana Saengsoy, Rachot Chatchawan, Somnuk Tangtermsirikul

International Conference on Durability of Concrete Structures

This study is aimed to investigate effect of fly ash on compressive strength, free expansion and shrinkage of expansive concrete. High CaO and low CaO fly ashes are used in this study. The replacement percentages of total binders by fly ash are 0 and 30% by weight. The replacements of expansive additive are 0, 20 and 30 kg/m³ of concrete. The test results revealed that the use of fly ash especially the high CaO fly ash can enhance expansion of expansive concrete at early age. The use of fly ash also reduces shrinkage at long term of the expansive …

Carbonation In Alternative Cementitious Materials: Implications On Durability And Mechanical Properties, Prasanth Alapati, Kimberly E. Kurtis Dr.

International Conference on Durability of Concrete Structures

Understanding the rate and implications of carbonation on strength and durability in alternative cementitious materials (ACMs) is critical in designing ‘green’ concretes for intended service lives. In this paper, three commercially available ACMs, including one calcium aluminate cement (CAC), one calcium sulfoaluminate belite cement (CSA), and one alkali-activated binder using class C fly ash (AA), were evaluated against one portland cement (OPC). Thermogravimetric analysis (TGA) and x-ray diffraction (XRD) techniques were used to understand the effect of carbonation on ACM paste composition. Water sorption tests on both carbonated and uncarbonated cement mortar showed a significant reduction in porosity of this …

Effects Of Temperature And Curing Duration On The Stability Of Slag Cements In Combined Chloride-Sulphate Environments, Joseph Onah Ukpata, P. A. M. Basheer, Leon Black

International Conference on Durability of Concrete Structures

This experimental study investigates the effects of temperature and curing duration on the stability of slag blended cement systems exposed at 20 °C and 38 °C to combined sodium chloride (30 g/L) – sodium sulphate (3 g/L) solutions. Two slags, designated as slag 1 and 2, having CaO/SiO₂ ratios of 1.05 and 0.94, were respectively blended with Portland cement CEM I 52.5R at 30 wt.% replacement level. Mortar prisms and cubes with w/b ratio of 0.5 and binder/aggregate ratio of 1:3 were then prepared for length and mass changes. The samples were cured in lime water for either 7 …

An Extensible Geospatial Data Framework (Geoedf) For Fair Science, Carol Song, Rajesh Kalyanam, Lan Zhao

Purdue GIS Day

The growing urgency in dealing with the 21st century’s grand challenges associated with increasing population, food and water security, frequently occurring natural disasters, and changing climate demands innovative, collaborative, and multidisciplinary solutions for sustainability and resilience. However, scientific data, especially geospatial data, presents significant barriers to the effective access, use and sharing of data as they come in large volumes, from different sources, and with widely varying formats, resolutions, or annotation schemas that can differ among disciplines or even research groups. This presentation describes a recently funded NSF CSSI project to develop an open source, extensible geospatial data framework (GeoEDF), …

Soil Erosion Analysis Of The Monroe County’S Watersheds In Indiana, Danielli De Melo Moura, Jie Shan

Purdue GIS Day

This study was carried out to spatially predict the amount of soil loss (tons/ha/year ) of Monroe County’s watersheds using Geographic Information System (GIS). Revised Universal Soil Loss Equation (RUSLE) was used to estimate potential soil losses by using information such as rainfall data for calculating the rainfall erosivity (R) , soil map for calculating the soil erodibility (K), digital elevation model for obtaining the topography factor (LS) and vegetation/cropland cover for calculating the cover management factor (C) and support practice factor (P). The result of the analysis depicted that the soil loss rate in Moroe’s watersheds ranges from 0 …

Effects Of Removing Background Soil Reflectance Pixels From Vegetative Index Maps For Characterization Of Corn Responses To Experimental Treatments, Ana Morales, Robert L. Nielsen, James J. Camberato

Purdue GIS Day

In contrast to traditional data collection methods that require manual sampling, vegetative index (VI) maps derived from unmanned aerial vehicles (UAV) imagery are a potential tool to characterize temporal and spatial treatment effects in a more efficient and non-destructive way. Remotely-sensed reflectance data from a growing corn crop contains pixel values associated with the above-ground plant tissue (e.g., leaves, stalks, tassels) and the underlying soil features. Background soil reflectance data potentially reduces the effectiveness of VI for characterizing crop responses to experimental treatments. Removing background soil image pixels from the larger image dataset should improve that effectiveness. The objective of …

Seeing A Better World From Space, Carly Sakumura

Purdue GIS Day

Understanding change is essential to addressing our most pressing global challenges. Organizations need actionable insight to make critical decisions that affect communities, economies, and national security. As a global leader of advanced geospatial and space-based technology solutions, Maxar has an unprecedented ability to observe, analyze, and monitor these global changes. In this talk, I’ll discuss the cutting-edge research, technological capabilities, and imagery products and analytics we develop at Maxar to unlock the power of geospatial data to understand and navigate our changing world.

Student Information Use And Decision-Making In Innovation Competitions And The Impact Of Librarian Interventions, Heather A. Howard, Dave Zwicky

Libraries Faculty and Staff Scholarship and Research

At a large Midwestern university, librarians work closely with an annual undergraduate agricultural innovation competition to guide students through the process of conducting market research and assessing patentability. In 2018, the authors conducted an exploratory study using focus groups of students who had participated in that year’s competition in order to learn how students find and use information in a competition setting, to evaluate the impact of library support on the students’ success, and inform further assessment activities. Results showed that students used information from the library and from their own research, notably seeking out first-hand expertise, to practice evidence-based …

Photogrammetric Measurement Of Hardwood Species At A Stand Level Using Rgb Images From Unmanned Aerial Vehicle (Uav), Aishwarya Chandrasekaran

Purdue GIS Day

Nowadays, for many remote sensing applications, drones are employed for gathering data, as it provides low cost image acquisition with minimal human intervention. Drone remote sensing has an extensive use in forestry for maintaining inventories, mapping canopy structure and monitoring forest fires. Maintaining a Forest inventory database is a crucial task as it is the only means of keeping a record of the trees. This study aims to explore UAV based image acquisition (consumer-grade sensor) and analysis for forest studies using structure from motion technique.The main objective is to derive a methodology for computing tree parameters such as tree height, …

Eva And Otto: Resistance, Refugees, And Love In The Time Of Hitler, Tom Pfister, Kathy Pfister, Peter Pfister

Purdue University Press Book Previews

Eva and Otto is a true story about German opposition and resistance to Hitler as revealed through the early lives of Eva Lewinski Pfister (1910–1991) and Otto Pfister (1900–1985). It is an intimate and epic account of two Germans—Eva born Jewish, Otto born Catholic—who worked with a little-known German political group that resisted and fought against Hitler in Germany before 1933 and then in exile in Paris before the German invasion of France in May 1940. After their improbable escapes from separate internment and imprisonment in Europe, Eva obtained refuge in America in October 1940 where she worked to rescue …

Mapping Postcolonial Literature, Matthew Hannah, Yiqui Yan

Purdue GIS Day

Matthew Hannah (Assistant Professor of Digital Humanities) Yiqiu Yan (Undergraduate Researcher) Space and place are incredibly important features of the postcolonial novel and, for writers of the twentieth and twenty-first centuries who are living in former colonies, geography plays an incredibly significant role in navigating issues of identity, language, and nationality. Because the land is such a contested concept in postcolonial writing, we believe that attending to the localities described in literary representations of the land will provide a rich resource for theorizing the relationship between people and places, between colonies and nations. “Mapping Postcolonial Literature” will showcase an interactive …

Growth, Sprawl, And The Contradictions Of Capitalism: San Diego Suburbs And The Speculative Frenzy, 1970-1991, Richard Hogan

Purdue GIS Day

San Diego has become the most beautiful place where nobody can afford to live because speculative growth drives housing prices regardless of the level of supply or demand. How this happened in San Diego County is fairly clear. Marx explained that ground rents (and thereby land prices) increase when capital and labor are invested in the most valuable land and when investment is intensive, with vast amounts of labor and capital focused on the high yield properties to the virtual exclusion of less productive or less valuable lands. In fact, speculative growth between 1960 and 1980 conformed to what Marx …

Quantifying Four Decades Of Arid-Region Agricultural Development In Arequipa, Peru Using Landsat, Zachary S. Brecheisen, Nicholas Hamp-Adams, Edwin Bocardo Delgado, Martin Villalta Soto, Timothy Filley, Darrell G. Schulze

Purdue GIS Day

The Arequipa Nexus Institute for Food, Energy and the Environment (Nexus Institute) is located in Southwestern Peru, generally bounded by the city of Arequipa to the east, the Majes River to the west, the Pacific Ocean to the south, and the Andes mountains to the north. Though agriculture has been practiced in parts of this cool desert region (MAT~15°C, MAP

Visualizing Election Results With Arcgis, Ryan Day

Purdue GIS Day

In 2018, Porter County, Indiana held its municipal elections concurrent with the national midterm elections. Using ArcGIS, the election results for the fourway race for the Duneland School Board at-large seat are mapped. These results are compared to other area election results, voter characteristics, and previous election results to try to visualize the correlation between factors affecting the race, including candidate ideology, geographic base, area demographics, turnout, and national electoral trends. This project serves as a demonstration of how GIS software can improve the understanding of what influences voters and election outcomes.

The Value Of Open Gis In Higher Education, Christina Hupy

Purdue GIS Day

Open source software has become increasingly popular in geospatial research and industry. Despite this trend, higher education has less readily adopted open source in GIS curriculum which has been dominated by proprietary systems for decades. This presentation will discuss the value of bringing open source into GIS curriculum. The discussion will focus on several aspects including GIS curricular standards and competencies, employer demand, generational interest (millennials), pedagogical benefits, and general societal benefits. Strategies for encouraging the adoption of open source in GIS curriculum will be identified.

Investigation Of Late Roman Settlement On Dana Island, Bogsak Archaelogical Survey Project, Nicholas K. Rauh, Ayman Habib, Evan Flatt, Angus Moore, Gunder Varinlioglu

Purdue GIS Day

Purdue researchers participated in the 2019 season of the Bogsak Archaeological Survey Project in south coastal Turkey. Prof. Ayman Habib and Evan Flatt of CE used a drone to conduct LIDAR and camera mapping of the Late Roman harbor remains of Dana Island (approximately 250-800 AD). The remains, including vast quarry trenches and terraces of houses, cisterns, and churches, are covered in dense, nearly impenetrable garrigue brush, making standard architectural mapping laborious, inaccurate, and hazardous. The results of the LIDAR mapping should reveal a detailed map of obscured remains in real world coordinates, making it possible to map the remains …

Galápagos: Imaginarios Y Evolución Textual En Las Islas Encantadas, Esteban Mayorga

Purdue University Press Book Previews

Este libro intenta mostrar la representación textual de las islas Galápagos desde su descubrimiento hasta nuestros días. El argumento principal sugiere que la descripción de este espacio crucial para la modernidad, dada la retórica de los escritores de viajes y ficción, transforma el área insular para concebir formas alternativas del proyecto de construcción nacional en América Latina. Como resultado de las empresas coloniales, excursiones científicas, crónicas periodísticas o expediciones, la escritura de viaje de las Galápagos condiciona la formación del estado y su imaginario nacional. Esto ocurre por el capital simbólico que posee archipiélago y por el deseo de los …

Opmaps - Data And Narratives In Military History And Beyond, Sorin Matei, Robert Kirchubel

Purdue GIS Day

Opmaps is mapping and analytics toolkit for operational military history. The toolkit employs statistical analysis to create operational datamaps, which present processes, trends, and developments in time and space. It connects quantities, such military forces, firepower, or civilians impacted, statistically with the narratives, which will be used for historical analysis and teaching. Target audiences are scholars and students. The toolkit will include a database, analytic and statistical scripts, and a visualization interface. It will also include four datasets, which can be used in scholarly research and as tutorials for future users of the toolkit. The toolkit provides military historians open-source …

Making Peace In An Age Of War: Emperor Ferdinand Iii (1608–1657), Mark Hengerer

Purdue University Press Book Previews

This English-language translation of Mark Hengerer's Kaiser Ferdinand III: 1608–1657 Eine Biographie is based on an analysis of the weekly reports sent by the papal nuncio’s office to the Vatican. These reports give detailed information about the daily whereabouts of the dynasty, courtiers, and foreign visitors, and they contain the gossip of the court in addition to weekly analysis of some political problems. This material enabled the author to report on daily life of the dynasty and to analyze the circumstances under which policy was made, which has led to a balance between the personality of Ferdinand III and the …

Spatial Distribution Of Religious Sites In China: A Web-Based Data-Rich Application Using Esri, Guojun Han

Purdue GIS Day

The Online Spiritual Atlas of China (OSAC), created by the Center on Religion and Chinese Society at Purdue, was constructed as a complement to the print volume, Atlas of Religion in China: Social and Geographical Contexts, by Fenggang Yang (Brill, 2018), as a way to visually demonstrate the extent and distribution of religious sites in China. OSAC is power by ArcGIS online, and some features were developed with ArcGIS JavaScript SDK. The site allows users to visualize the spatial distribution of individual religious sites in China, as well as see how provinces, prefectures, and counties compare with each other in …

Overcoming Today’S Ethical Challenges For Librarians And Vendors (Lively Discussion), Barbara Albee, Damon Campbell, Lisa L. Martincik

Charleston Library Conference

Librarians and information professionals are often faced with situations that require judgment of ethical behavior regarding the library, patrons, and vendor relationships. Librarians encounter conflicts of interest, intellectual freedom issues, privacy concerns, and vendor and publisher relations dilemmas daily. Shrinking and flat budgets and rapidly advancing technology create further challenges to providing high-quality services while practicing ethical behavior. In this session, you will learn some of the ethical challenges that present themselves in librarianship and tactics that can be employed to overcome such challenges. In addition, you will learn how to work and build ethical relationships with vendors, how vendors …

“They Didn’T Teach This In Library School”: Identifying Core Knowledges For Beginning Acquisitions Librarians, Lindsay Cronk, Rachel M. Fleming

Charleston Library Conference

Library workers new to acquisitions or taking on new acquisitions duties can find themselves lost without appropriate resources. We often hear the refrain “they didn’t teach this in library school.” Basic introductions to issues confronting acquisitions librarians can be hard to find and out-of-date. Meanwhile, emerging issues are addressed in journal literature, but few reviews of the issues are available to provide background to newcomers. While professional development opportunities strive to provide sure footing to acquisitions newcomers, we can often fall short, leaving our new colleagues feeling adrift.

Through a positive and structured discussion we will explore the existing and …

Decoding The Scholarly Resources Marketplace, Lindsay Cronk, Rachel M. Fleming

Charleston Library Conference

Developed with input from a variety of library workers and industry representatives, this session will provide a current and concise introduction to the scholarly resource marketplace for academic libraries, highlighting the financial and functional connections between major market actors providing services and content to libraries.

Discussions of vendor relations in libraries have often focused on the interpersonal collaboration of library workers and vendor representatives. In the process, they have overlooked or neglected the connections between publishers and vendors, their parent corporations and subsidiary companies.

Decoding requires a focus on vocabulary and building shared understanding of the marketplace for scholarly resources. …

Nothing Happens Unless First A Dream: Demystifying The Academic Library Job Search And Acing The Application Process, Scottie Kapel, Elizabeth M. Skene, Whitney P. Jordan

Charleston Library Conference

Academic library positions can be highly desirable for both new librarians and experienced librarians interested in transitioning into a different setting. Yet for both novice and experienced librarians alike, landing an interview for an academic librarian position can feel intimidating and overwhelming. Applicants may have difficulty understanding tenure track requirements, no academic library experience, no coursework in relevant areas, and may be competing with a large pool of qualified candidates. When academic job openings ask for years of academic library experience and library school specializations suggest that the path you pick is the path you keep until retirement, it begins …

Engaging Alumni: The How And Why Of Author Outreach For Dissertation Scanning Projects, Christy L. M. Shorey

Charleston Library Conference

In 2008 the University of Florida George A. Smathers Libraries began a project to digitize their collection of over 14,000 print dissertations, ranging from 1934 to 2006, and upload them to the Institutional Repository (IR@UF). At UF, copyright remains with dissertation authors and not the university. Thus, we started an outreach effort to ask authors to opt in to the Retrospective Dissertation Scanning (RDS) project. We worked with the Alumni Association to get contact information for our doctoral graduates, then reached out to them through multiple mediums: e-mail, letter, and postcard. In 2011 Gail Clement and Melissa Levine published “Copyright …

Is Your Library Ready For The Reality Of Virtual Reality? What You Need To Know And Why It Belongs In Your Library, Carl R. Grant, Stephen Rhind-Tutt

Charleston Library Conference

VR is no longer just gaming. It’s increasingly being deployed across academic campuses and is becoming indispensable in fields ranging from the humanities to engineering to anthropology. A recent survey indicated that 100% of ARL campuses were using VR, with 40% of libraries actively supporting it. This paper discusses practical examples of how libraries are helping their institutions build out virtual reality, utilizing 3D objects and explains why the library is the best place to do so. It provides a basic grounding in VR and related areas, showing what it is and why it's important to libraries. Specific attention is …

(Un)Structuring For The Next Generation: New Possibilities For Library Data With Nosql, Matthew D. Harrington, Dennis B. Christman

Charleston Library Conference

For many years, libraries have relied upon relational databases (RDBMS) to store, manipulate, and query various types of data, and this database model works extremely well when data are highly structured. As the data become more complex, however, the relational database model strains under the burden of maintaining complex joins, which can decrease a database's performance and limit its functionality. Furthermore, data are not always best represented in the RDBMS's flat, tabular format. Library data often require flexibility and extensibility to accommodate the increasing volume and variety of library resources and metadata. To address these issues, transforming the underlying structure …

What Are We Doing? Capturing The Uncaptured: Workload Data To Demonstrate Service, David Brennan

Charleston Library Conference

Capturing service data can be difficult, particularly for technical services and electronic resources librarians—using standard tools such as RefTracker is cumbersome, and taking more time to enter the transaction than it actually took to perform the task is an impediment to gathering good service data. The services provided by these librarians are equally as public-facing as those provided at the reference desk, but are often not captured or reported. A possible solution is to use sent e-mail as a data source for demonstrating services provided by technical services and electronic resources librarians. This lightning round demonstrates one such approach using …