1,720,976 research outputs found
Twin Cities Metropolitan Area Groundwater Chloride Data, 1965-2021
No full textThe data includes well identifier and location, date(s) of sampling, chloride concentration, aquifer unit sampled, and the thickness of clay present in overlying quaternary deposits.This dataset is compiled from 55 years of groundwater quality testing work done by the Minnesota Pollution Control Agency, the Minnesota Department Natural Resources, and the Minnesota Department of Health.McDaris, John R; Feinberg, Joshua M; Runkel, Anthony; Levine, Jonathan; Alexander Jr., E. Calvin; Kasahara, Sophie. (2021). Twin Cities Metropolitan Area Groundwater Chloride Data, 1965-2021. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/jxx7-1k60
OFR18-02, Stratigraphic Positions of Springs in Southeast Minnesota
No full textSprings are places where groundwater is returned naturally to the surface and are a place to study the state of the groundwater in the aquifer system. In southeast Minnesota, springs are outlets in a conduit flow system in both carbonate and siliciclastic bedrock formations. They provide baseflow for streams and are a critical source of cold, relatively constant temperature water for trout. This report and associated database summarizes the results of various projects, inquiries, and studies over the years during which MGS staff investigated the location and stratigraphic position of southeastern Minnesota springs. It was produced as part of a contract between MDNR and MGS. The primary contract deliverable is a GIS feature class that contains the essential data from our hydrostratigraphic work. We have also placed notes associated with many of our interpretations into Appendix A of this report.Funded through the Minnesota Department of Natural Resources, from the Environment
and Natural Resource Trust Fund as recommended by the Legislative and Citizen’s
Commission on Minnesota Resources (LCCMR).Steenberg, Julia R; Runkel, Anthony C. (2018). OFR18-02, Stratigraphic Positions of Springs in Southeast Minnesota. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/198183
Ordovician Karst of Southeast Minnesota Field Trip Guidebook
No full text6 October 2015 Field Trip - 14th Sinkhole Conference Rochester, Minnesota, U.S.A. A field trip is designed to introduce the Paleozoic bedrock aquifers of southeastern Minnesota. These aquifers provide the base flow for the rivers and streams in the area.
"This field trip will focus on the heterogeneities in the routes that water uses as it moves from recharge areas to discharge areas though the Paleozoic aquifers. We will look at a variety of conduits, pipes, high transmissivity zones and other ground-water flow paths. We will see porosity that ranges from the resolution of our vision to voids that houses could be built in." A collaborative effort between the Minnesota Department of Natural Resources, the University of Minnesota and the Minnesota Geological Survey.Alexander Jr., E. Calvin; Green, Jeffrey A; Runkel, Anthony C; Barry, John D. (2015). Ordovician Karst of Southeast Minnesota Field Trip Guidebook. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/185399
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
OFR14-03, Geologic Controls on Groundwater and Surface Water Flow in Southeastern Minnesota and its Impact on Nitrate Concentrations in Streams: Local Project Area Report
No full textNot fully edited to MGS publication standards.This report summarizes the results of part of a Minnesota Geological Survey (MGS) investigation conducted for the Minnesota Pollution Control Agency (MPCA) designed to support watershed planning efforts in southeast Minnesota. The broader project provides better understanding of the geologic controls on nitrate transport in the region, including nitrate in groundwater that is the source of baseflow to streams. This report describes a local scale subproject focused on a relatively small part of the Root River watershed in Fillmore County. We conducted new mapping that provides a more detailed depiction of the geologic conditions in a three dimensional electronic format suitable for groundwater-surface water modeling. In addition, we used existing maps and reports along with new field data collected during the course of this project to improve the hydrostratigraphic characterization of the bedrock. This led to a more comprehensive understanding of the hydrostratigraphic attributes of bedrock that forms the Upper Carbonate Plateau, which dominates the landscape in the local project area. Cross sections within the local project area are used to illustrate how nitrate is transported in the ground and surface water system.his report is a contract deliverable summarizing work conducted by the Minnesota Geological Survey for the Minnesota Pollution Control Agency, Contract number B50858 (PRJ number PRJ07522), entitled “Geologic Controls on Nitrate in Southeast Minnesota Streams”Steenberg, Julia R.; Tipping, Robert G.; Runkel, Anthony C.. (2014). OFR14-03, Geologic Controls on Groundwater and Surface Water Flow in Southeastern Minnesota and its Impact on Nitrate Concentrations in Streams: Local Project Area Report. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/162613
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
OFR14-02, Geologic controls on groundwater and surface water flow in southeastern Minnesota and its impact on nitrate concentrations in streams
No full textNot fully edited to MGS publication standards.This report summarizes the results of a Minnesota Geological Survey (MGS) investigation conducted for the Minnesota Pollution Control Agency (MPCA) designed to support watershed planning efforts in southeast Minnesota. Specifically it provides better understanding of the geologic controls on nitrate transport in the region, including nitrate in groundwater that is the source of baseflow to streams. Nitrate contamination of surface water and groundwater is a long- standing issue in southeastern Minnesota.
We focused much of our investigation on an evaluation of nitrate (NO3 ion) transport in the Root River watershed because of the relatively advanced understanding of the karstic conditions in that area. However, the overall scope of the project includes the entire bedrock-dominated landscape of southeast Minnesota. Our results therefore support a broader MPCA watershed planning effort that directly pertains to the Root River, as well as to other watersheds within the Lower Mississippi River Basin in Minnesota.This report is a contract deliverable summarizing work conducted by the Minnesota Geological Survey for the Minnesota Pollution Control Agency, Contract number B50858 (PRJ number PRJ07522), entitled “Geologic Controls on Nitrate in Southeast Minnesota Streams”Runkel, Anthony C.; Steenberg, Julia R.; Tipping, Robert G.; Retzler, Andrew J.. (2014). OFR14-02, Geologic controls on groundwater and surface water flow in southeastern Minnesota and its impact on nitrate concentrations in streams. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/162612
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
- …
