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Recent Submissions

G-Designs for Tadpole Graphs
(2025-12) Jacobs, Cole
We investigate the existence of G-designs for the tadpole family of graphs. Specifically, we show that for any tadpole graph G on n edges, G decomposes the complete graph on 2nk edges, and 2nk+1 edges, for any positive integer k. These tadpole graphs are classified into two cases: Those with an odd cycle, and those with an even cycle. For each case, graph labeling algorithms are defined for both rho-tripartite labelings and 1-rotational rho-tripartite labelings.
Outdoor Learning in Cold Weather: A Study of Nature Preschools’ Policies, Practices and Procedures
(2025-12) Johnson, Emily Kolina
Cold weather outdoor play in early childhood facilitates development and overall well-being, yet it is an underresearched topic, with parents, practitioners and policy- and decision-makers having various levels of understanding and comfort. Thus, this study compiled and summarized procedural knowledge about cold weather outdoor play from preschool practitioners (lead teachers) who have a shared value of outdoor and nature-based play experiences and are actively implementing cold weather play in their programs. Drawing upon 38 questionnaire responses and nine interviews with practitioners in Minnesota and Norway, the data suggests that these practitioners value the unique benefits of cold weather play and use a variety of strategies to safely bring children outdoors despite very cold temperatures that occur during program hours. Starting with small steps, outdoor play can progressively be built upon to withstand longer periods and in colder temperatures. This study resulted in a better understanding of what nature-based preschool practitioners are currently doing to support outdoor learning in winter environments. Countering cold weather safety concerns among interest holders and community members furthers the movement for outdoor learning in public and private preschool settings.
An Oxymetazoline-based Hemostatic Solution Used with MTA for Pulpal Therapy: A Retrospective Study - Data Sharing Archive [Data set]
(2025-12-12) Jones, Robert S; Lee, Hannah; Jia, Jingqi; Sarvas, Elise W; robertsjones@gmail.com; Jones, Robert; B-A-M (Biofilm-Apatite-Microbiome) School of Dentistry
Background/Objectives: Pulpotomies treated with mineral trioxide aggregate (MTA) have higher success rates as those treated with ferric sulfate (FS). The purpose of this study is to assess if the addition of an oxymetazoline (OXY) hemostatic solution, which can be used to manage pulpal bleeding hemostasis, maintains the higher MTA surviv-ability compared to pulpotomies treated with FS. Methods: In this retrospective cross-sectional study, patient data (n=75) was used to assess radiographic and clinical signs and symptoms of pathosis in primary molars receiving a pulpotomy and stain-less-steel crown. Pulpotomies treated with FS (Group 1) were compared to those treated MTA with OXY induced hemostasis (Group 2). Radiographic assessment was per-formed by a blinded reviewer. Cox proportional hazards regression analyzed the effects of patient and practice level covariates on radiographic and clinical pathosis. Restricted mean survival times (RMST) were calculated as the area under Kaplan-Meier survival curves Results: Cox proportional-hazard regression identified three potential covariates (age, pulpotomy groups, and procedure location) that predicted radiographic pathosis. The adjusted hazard ratio for Group 2 was 0.30 (95% CI: 0.11-0.82) indicating improved radiographic outcomes versus Group 1(P=0.02). The 36 month RMST for Group 2 was 30.1 months (95% CI: 26.5-33.7) compared to 24.7months (21.6-27.8) for Group 1 (P=0.025). Conclusions: OXY, can manage pulpal bleeding via temporary vasocon-striction of pulp tissue, and can be used prior to MTA placement. This method leads to higher pulpotomy survival than FS.
FPI : flowering plant index. Volumes 1-3
(Andersen Horticultural Library, University of Minnesota Libraries., 1997) Isaacson, Richard T.; Andersen Horticultural Library
Indexes literature on flowering plants that include color photographs or illustrations.
Report of nursery & seed catalog collections in the Upper Midwest
(Andersen Horticultural Library, University of Minnesota Libraries., 1980) Rogier, June; Sand, Evelyn; Council on Botanical and Horticultural Libraries (U.S.); Andersen Horticultural Library