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Induction Heat Tube Extraction for Generating Bank Replacement, 2011 PEERS Conference

Induction Heat Tube Extraction for Generating Bank Replacement, 2011 PEERS Conference

Kinetic Model-Based State Estimation and Inferential Control of the Causticizing Process, 2011 PEERS Conference

Kinetic Model-Based State Estimation and Inferential Control of the Causticizing Process, 2011 PEERS Conference

The Mill Wide Inventory Prediction Model and Scheduler â?¢A Tool for Scenario Analysis and On-Line Liquor and Fiber Inventory Management, 2011 PEERS Conference

The Mill Wide Inventory Prediction Model and Scheduler •A Tool for Scenario Analysis and On-Line Liquor and Fiber Inventory Management, 2011 PEERS Conference

Softwood Usage for BiorefiningPanel Discussion, 2011 PEERS Conference

Softwood Usage for BiorefiningPanel Discussion, 2011 PEERS Conference

Non-Hazardous Secondary Materials and Regulatory Applicability - Could your boiler be subject to the Commercial/ Industrial Solid Waste Incinerator Rules?, 2011 PEERS Conference

Non-Hazardous Secondary Materials and Regulatory Applicability - Could your boiler be subject to the Commercial/ Industrial Solid Waste Incinerator Rules?, 2011 PEERS Conference

Air Toxics Standards for Boilers, 2011 PEERS Conference

Air Toxics Standards for Boilers, 2011 PEERS Conference

Industrial Boiler/Process Heater MACT: Technical Issues, 2011 PEERS Conference

Industrial Boiler/Process Heater MACT: Technical Issues, 2011 PEERS Conference

Boiler MACT Compliance Options, 2011 PEERS Conference

Boiler MACT Compliance Options, 2011 PEERS Conference

Journal articles
Open Access
Editorial: AI in Higher Education: Implications for scholarly publishing, TAPPI Journal September 2026

Even as we grapple with the positive and negative implications of artificial intelligence (AI), it has become increasingly embedded in our personal lives and work, including higher education. A recent snapshot of AI’s impact in this area is the Digital Education Council’s (DEC’s) AI in Higher Education Global Survey 2026. Founded in early 2024 to study how AI and digital transformation impact higher education, learning, and workforce skills, DEC is made up of member institutions throughout the world in academia and vocational learning. It currently has more than 200 members in over 42 countries.

Journal articles
Open Access
Nonlinear modeling of batch digester discharge dynamics with rheology-driven hydraulic transport and drainability coupling, TAPPI Journal September 2026

ABSTRACT: Batch digester blowdown constitutes a strongly nonlinear transient transport process governed by the coupled evolution of pulp consistency, slurry density, hydraulic resistance, liquid inventory, and discharge line dynamics. A control-oriented nonlinear formulation is developed by coupling dry fiber and free liquor mass balances with phase volume reconstruction, consistency-dependent hydraulic resistance, channeling and drainability effects, and a power law head flow relationship derived within a lumped hydraulic inertance framework. A fixed-gain PI controller obtained from local linearization is employed as the conventional benchmark, whereas an integral sliding mode controller (SMC) explicitly compensates the nonlinear time-varying hydraulic structure and bounded disturbances. Both strategies are evaluated under identical actuator constraints and sequential perturbations involving opposing head, hydraulic resistance, channeling, drainability, and dilution. Numerical results demonstrate lower rootmean- square error, integral absolute error, and peak flow-tracking error for the SMC, with rapid recovery toward the prescribed sliding boundary layer and improved robustness to variations in the nonlinear flow exponent n. Cumulative electrical energy and batch-specific specific energy consumption remain comparatively similar, indicating that the principal SMC benefit is enhanced hydraulic regulation rather than substantial batch energy reduction. Specific energy consumption is an established metric for energetic assessment of slurry transport. Model-based hydraulic demand, electrical power, and sliding manifold surfaces further characterize the nonlinear operating domain. The resulting framework provides a computational proof-of-concept for modeling and control of transient batch digester discharge systems.

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