Shape invariant model approach for functional data analysis in uncertainty and sensitivity studies

Dynamic simulators model systems evolving over time. Often, it operates iteratively over fixed number of time-steps. The output of such simulator can be considered as time series or discrete functional outputs. Metamodeling is an e ective method to approximate demanding computer codes. Numerous metamodeling techniques are developed for simulators with a single output. Standard approach to model a dynamic simulator uses the same method also for multi-time series outputs: the metamodel is evaluated independently at every time step. This can be computationally demanding in case of large number of time steps. In some cases, simulator outputs for di erent combinations of input parameters have quite similar behaviour. In this paper, we propose an application of shape invariant model approach to model dynamic simulators. This model assumes a common pattern shape curve and curve-specific di erences in amplitude and timing are modelled with linear transformations. We provide an e cient algorithm of transformation parameters estimation and subsequent prediction algorithm. The method was tested with a CO2 storage reservoir case using an industrial commercial simulator and compared with a standard single step approach. The method provides satisfactory predictivity and it does not depend on the number of involved time steps

Management of Optaflexx in Feedlots that Sort Cattle prior to Market

One hundred and thirty five steers from were used in a study to compare strategies for managing Optaflexx in feedlots that sort cattle just prior to market. The pens were assigned to one of two Optaflexx management treatments. Two pens were each assigned to each treatment. The Optaflexx management treatments were: 1) Topped Out (TO), where half the cattle in each pen were sorted without being fed Optaflexx. The remaining cattle were fed Optaflexx for 28 days, or 2) Sorted Early (SE), where market timing decisions were made more than 28 days prior to the first marketing so that Optaflexx could be fed to all of the cattle. Feed consumption levels and patterns were not affected by sorting cattle early into market outcome groups. There were no differences in performance between the two sorting treatments. Cattle in the SE treatment had significantly larger ribeye areas. Based on the results of this study sorting cattle into market outcome groups prior to the last 28 days of feeding of the first group to be marketed so that Optaflexx can be fed to all of the cattle in the pen is a viable alternative to only feeding Optaflexx to the “last draft” to be marketed

Effect of Synovex Choice Implant on Performance and Carcass Traits of Steer Calves

As marketing of fed cattle has evolved over the past few years, technologies that improve performance and lower cost with the least effect on carcass quality have become more important. One such technology is the intermediate dosage combination implant. These implants combine TBA and estrogen for additive growth response, but at a lower dosage that may reduce potential negative effects of combination implants on carcass quality. Intermediate dosage implants have been used to provide a more aggressive arrival implant for feedlot cattle, or a more conservative terminal implant depending on the goals of the manager. With the recent clearance of Synovex Choice for feedlot steers, the cattle feeder now has two options relative to intermediate dosage combination implants, Synovex Choice and Revalor IS. This study was designed to compare two practical implant combinations—Synovex Choice implanted initially and reimplanted, and Synovex S implanted initially and reimplanted with Revalor IS

Effect of Yeast Supplement on Performance of Steer Calves

The effect of Prosponse1 yeast supplement fed to newly arrived steers was evaluated at the ISU Armstrong Research Farm near Lewis, Iowa. Four pens of approximately 32 head were fed similar diets with 2 pens receiving yeast supplement and 2 pens not. Calves were weighed on delivery to the feedlot and allocated on weight and sire. Calves were on test 34 days. There was no effect on daily gain or feed to gain. Dry matter intake trended higher for the yeast supplemented calves (P=.10). These data suggest that yeast supplement may improve dry matter intake in newly arrived feedlot calves. Yeast supplements have been evaluated in dairy cattle but have not been evaluated in newly arrived feedlot calves

Generation of non-stationary stochastic fields using Generative Adversarial Networks with limited training data

In the context of generating geological facies conditioned on observed data, samples corresponding to all possible conditions are not generally available in the training set and hence the generation of these realizations depends primary on the generalization capability of the trained generative model. The problem becomes more complex when applied on non-stationary fields. In this work, we investigate the problem of training Generative Adversarial Networks (GANs) models against a dataset of geological channelized patterns that has a few non-stationary spatial modes and examine the training and self-conditioning settings that improve the generalization capability at new spatial modes that were never seen in the given training set. The developed training method allowed for effective learning of the correlation between the spatial conditions (i.e. non-stationary maps) and the realizations implicitly without using additional loss terms or solving a costly optimization problem at the realization generation phase. Our models, trained on real and artificial datasets were able to generate geologically-plausible realizations beyond the training samples with a strong correlation with the target maps

Effect of MGA on Performance, Sexual Behavior, Carcass Quality and Tenderness in Mixed-Sex Pens of Cattle

The effect of MGA in mixed pens of steers and heifers was evaluated over a three-year period at the ISU Armstrong Research Farm near Lewis, Iowa. Two pens of approximately 40 head were fed diets with or without MGA in each of three replications. Estrus and riding activity was monitored using the Heat Watch system. At slaughter, in addition to routine carcass data collection, a rib sample was collected from each carcass for tenderness evaluation. There was no effect on dry matter intake due to MGA treatment. Mixed-sex pens that were fed MGA were 4% more efficient than controls. MGA-fed steers gained similarly to control steers. MGA fed heifers gained 8% faster than control heifers. MGA highly reduced measures of estrus and riding activity throughout the feeding period. MGA feeding improved marbling and tenderness measured in both steers and heifers. These data suggest that MGA has potential to improve performance, quality grade, and tenderness in mixed pens of steers and heifers

Stable ischemic heart disease in the older adults

Ischemic heart disease is caused by atherosclerotic and/or thrombotic obstruction of coronary arteries. Clinical spectrum of ischemic heart disease expands from asymptomatic atherosclerosis of coronary arteries to acute coronary syndromes (ACS) including unstable angina, acute myocardial infarction (non-ST elevation myocardial infarction and ST elevation myocardial infarction). Stable ischemic heart disease (SIHD) refers to patients with known or suspected SIHD who have no recent or acute changes in their symptomatic status, suggesting no active thrombotic process is underway. These patients include those with (1) recent-onset or stable angina or ischemic equivalent symptoms, such as dyspnea or arm pain with exertion; (2) post-ACS stabilized after revascularization or medical therapy; and (3) asymptomatic SIHD diagnosed by abnormal stress tests or imaging studies. This review summarizes clinical features and management of SIHD in the older adult. ACS in older adults is not considered in this review