Publications by authors named "J Asmus"

30 Publications

Feeding high amounts of almond hulls to lactating cows.

J Dairy Sci 2021 Aug 10;104(8):8846-8856. Epub 2021 May 10.

Department of Animal Science, University of California, Davis 95616. Electronic address:

California is the leading state for the production of almonds, with more than 400,000 bearing hectares of orchards that produced approximately 1 billion kilograms of shelled nuts in 2017. Almond hulls (AH) are a regional by-product feedstuff fed predominantly to dairy cattle in California. A 2012 study surveyed 40 dairy farms in California and found that 39 out of 104 total mixed rations contained AH, with a mean daily feeding rate of 1.45 kg/cow. In 2017, approximately 2 billion kilograms of AH was produced. At a feeding rate of 1.45 kg/cow daily, even if all 1.7 million lactating cows in California are consuming AH, there will be a surplus of AH on the market as the approximately 130,000 nonbearing hectares come into nut production. Therefore, the potential of feeding varying amounts of AH to lactating dairy cows was investigated using 12 Holstein cows with 4 primiparous and 8 multiparous cows. The dietary treatments were 4 total mixed rations containing 0, 7, 13, or 20% AH. The AH used contained 12.8% crude fiber (as-is basis), which was below the 15% legal limit set by state feed regulations. Diets were formulated so that as the inclusion rate of AH increased, the amount of steam-flaked corn and soyhull pellets decreased and soybean meal inclusion increased. Experimental design was a replicated 4 × 4 Latin square. Diet had a cubic effect on actual milk yield, energy-corrected milk yield, and dry matter intake, with the 7% AH diet having the highest values and the 13% AH diet having the lowest. The percent and yield of total solids and the yields of lactose and fat did not differ with diet, but percent and yield of protein declined linearly with increased AH inclusion, and fat percent increased linearly. Apparent total-tract digestibilities of dry matter and organic matter were higher with the inclusion of AH in the diet. Total percentage of the day spent ruminating increased linearly with higher amounts of AH. Overall, this work demonstrated that AH can be fed at varying amounts, up to 20% of the diet, to lactating dairy cows to support high levels of milk production and that increasing amounts of AH (up to 20%) in the diet could lead to improved digestibility and milk fat percentage but decreased milk protein production.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.3168/jds.2020-19109DOI Listing
August 2021

Effect of Posttrial Visual Feedback and Fatigue During Drop Landings on Patellofemoral Joint Stress in Healthy Female Adults.

J Appl Biomech 2018 Feb 7;34(1):82-87. Epub 2018 Feb 7.

1 University of Wisconsin-La Crosse.

Patellofemoral pain (PFP) is common in females. Patellofemoral joint stress (PFJS) may be important in the development of PFP. Ground reaction force (GRF) during landing activities may impact PFJS. Our purpose was to determine how healthy females alter their landing mechanics using visual posttrial feedback on their GRF and assess how PFJS changes. Seventeen participants performed a series of drop landings during 3 conditions: baseline, feedback, and postfatigue feedback. The fatigue protocol used repetitive jump squats. Quadriceps force was estimated through inverse-dynamics-based static optimization approach. Then, PFJS was calculated using a musculoskeletal model. Multivariate differences were shown across conditions (P = .01). Univariate tests revealed differences in PFJS (P = .014), knee range of motion (P = .001), and GRF (P = .005). There were no differences in quadriceps force (P = .125). PFJS and GRF decreased from baseline to feedback (P = .002, P = .007, respectively), while PFJS increased from feedback to postfatigue feedback (P = .03). Knee range of motion increased from baseline to feedback (P = .043), then decreased from feedback to postfatigue feedback (P < .001). Visual feedback of GRF may reduce PFJS, but may not effectively transfer to a fatigued state.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1123/jab.2017-0074DOI Listing
February 2018

L -Adaptation: Simultaneous Design Centering and Robustness Estimation of Electronic and Biological Systems.

Sci Rep 2017 07 27;7(1):6660. Epub 2017 Jul 27.

Scientific Computing for Systems Biology, Faculty of Computer Science, TU Dresden, 01069, Dresden, Germany.

The design of systems or models that work robustly under uncertainty and environmental fluctuations is a key challenge in both engineering and science. This is formalized in the design-centering problem, which is defined as finding a design that fulfills given specifications and has a high probability of still doing so if the system parameters or the specifications fluctuate randomly. Design centering is often accompanied by the problem of quantifying the robustness of a system. Here we present a novel adaptive statistical method to simultaneously address both problems. Our method, L -Adaptation, is inspired by the evolution of robustness in biological systems and by randomized schemes for convex volume computation. It is able to address both problems in the general, non-convex case and at low computational cost. We describe the concept and the algorithm, test it on known benchmarks, and demonstrate its real-world applicability in electronic and biological systems. In all cases, the present method outperforms the previous state of the art. This enables re-formulating optimization problems in engineering and biology as design centering problems, taking global system robustness into account.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1038/s41598-017-03556-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5532288PMC
July 2017

Efficacy and Social Validity of Peer Network Interventions for High School Students With Severe Disabilities.

Am J Intellect Dev Disabil 2017 03;122(2):118-137

Katie Weir, University of Wisconsin-Madison.

This randomized controlled trial examined the efficacy of peer network interventions to improve the social connections of 47 high school students with severe disabilities. School staff invited, trained, and supported 192 peers without disabilities to participate in individualized social groups that met throughout one semester. Compared to adolescents in the "business-as-usual" control group (n = 48), students receiving peer networks gained significantly more new social contacts and friendships. Although many peer relationships maintained one and two semesters later, their spill over beyond the school day was limited. Students and staff affirmed the social validity of the interventions. We offer recommendations for research and practice aimed at improving the implementation and impact of peer network interventions in secondary schools.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1352/1944-7558-122.2.118DOI Listing
March 2017

Assessing the Social Skills and Problem Behaviors of Adolescents With Severe Disabilities Enrolled in General Education Classes.

Am J Intellect Dev Disabil 2016 Jul;121(4):327-45

Gregory L. Lyons, Department of Rehabilitation Psychology and Special Education, University of Wisconsin-Madison; Heartley B. Huber, Department of Special Education, Vanderbilt University; Erik W. Carter, Department of Special Education, Vanderbilt University; Rui Chen, Department of Special Education, Vanderbilt University; and Jennifer M. Asmus, Department of Educational Psychology and the Waisman Center, University of Wisconsin-Madison.

Although enhancing the social competence of students with severe disabilities has long remained a prominent focus of school-based intervention efforts, relatively little attention has focused on identifying the most critical social and behavioral needs of students during high school. We examined the social skills and problem behaviors of 137 adolescents with severe disabilities from the vantage point of both special educators and parents. We sought to identify areas of potential intervention need, explore factors associated with social skill and problem behavior ratings, and examine the extent to which teachers and parents converged in their assessments of these needs. Our findings indicate teachers and parents of high school students with severe disabilities rated social skills as considerably below average and problem behaviors as above average. In addition, lower social skills ratings were evident for students with greater support needs, lower levels of overall adaptive behavior, and a special education label of autism. We found moderate consistency in the degree to which teachers and parents aligned in their assessments of both social skills and problem behavior. We offer recommendations for assessment and intervention focused on strengthening the social competence of adolescents with severe disabilities within secondary school classrooms, as well as promising avenues for future research.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1352/1944-7558-121.4.327DOI Listing
July 2016
-->