Publications by authors named "D S Sorenson"
Background: Understanding interactions between multiple risk factors for shoulder and elbow injuries in Major League Baseball (MLB) pitchers is important to identify potential avenues by which risk can be reduced while minimizing impact on player performance.
Purpose: To apply a novel game theory-based approach to develop a machine-learning model predictive of next-season shoulder and elbow injuries in MLB pitchers and use this model to understand interdependencies and interaction effects between the most important risk factors.
Study Design: Case-control study; Level of evidence, 3.
Article Synopsis
- The study aimed to test if a sleep-light intervention that alters melatonin rhythms can help improve depression in perimenopausal and postmenopausal women.
- Two different intervention strategies were implemented: one that advanced sleep and provided morning bright light, and another that delayed sleep with evening light exposure for comparison among depressed participants and controls.
- Results showed that the phase-advance intervention significantly improved mood and advanced melatonin secretion timing in depressed participants, suggesting that adjusting melatonin rhythms could be beneficial for mental health in this demographic.
A cloud of very fast, (km/s), and very fine, (µm), particles may be ejected when a strong shock impacts and possibly melts the free surface of a solid metal. To quantify these dynamics, this work develops an ultraviolet, long-working distance, two-pulse Digital Holographic Microscopy (DHM) configuration and is the first to replace film recording with digital sensors for this challenging application. A proposed multi-iteration DHM processing algorithm is demonstrated for automated measures of the sizes, velocities, and three-dimensional positions of non-spherical particles.
View Article and Find Full Text PDFThe National Land Cover Database (NLCD), a product suite produced through the MultiResolution Land Characteristics (MRLC) consortium, is an operational land cover monitoring program. Starting from a base year of 2001, NLCD releases a land cover database every 2-3-years. The recent release of NLCD2019 extends the database to 18 years.
View Article and Find Full Text PDFBackground: Testing the hypothesis that combined wake + light therapy improves mood in pregnant vs. postpartum depressed participants (DP) by differentially altering melatonin and sleep timing.
Methods: Initially 89 women, 37 pregnant (21 normal controls-NC; 16 DP) and 52 postpartum (27 NCs; 25 DP), were randomized to a parallel trial of a phase-delay intervention (PDI): 1-night of early-night wake therapy (sleep 3-7 am) + 6-weeks of evening bright white light (Litebook Advantage) for 60 min starting 90 min before bedtime, vs.