Leon Sandler

Uncertainty-Aware Techno-Economic Assessment of Calcium-Based Treatment and Caustic Recovery from Refinery Spent Caustic

A computational screening study. No refinery or experimental data are used; all input ranges are generic placeholders, the PHREEQC results are model calculations and not experiments, and the economic and greenhouse-gas results are conditional screening estimates, not forecasts. P...

Risk-Calibrated Sensor Fusion for Underground Utility Mapping: A Simulation-Based Decision-Support Framework for Excavation Safety

A simulation study. No field data are used; all parameters are assumptions. Prepared for submission to Tunnelling and Underground Space Technology (Elsevier). A decision layer above ground-penetrating radar (250 and 600 MHz), an electromagnetic locator and a known anchor carries...

An Evidence-Graded Framework for Pharmaceutical Route Selection and Process-Risk Prioritization: A PN6047 Case Study

Purpose: To develop and demonstrate an evidence-graded framework for screening discovery-scale synthetic routes before experimental process development, using the publicly disclosed route to PN6047, a clinical-stage δ-opioid receptor agonist, as a case study. Methods: No synthesi...

Well-Posed Shear-Suppression Closures for Reduced Tokamak Transport: Admissibility, Regularization, and Physical Calibration

Version 2. Retargeted to IEEE Transactions on Plasma Science and extended after review. The earlier version (1.0.0) reported a steady-state fold at s_c = 0.047 that is an artifact of a first-order edge treatment of the shearing rate; this version treats the edge consistently at s...

Damage–repair kinetics and phase stiffness in a site-diluted XY model: implications for irradiated superconductors

Neutron damage lowers the transition temperature of REBCO conductors approximately linearly with displacement damage, and annealing recovers part of it, implicating phase stiffness. We model this competition as a two-dimensional XY lattice of the superconducting phase whose sites...

Damage-repair kinetics and phase stiffness in a site-diluted XY model: implications for irradiated superconductors

Version v4. Language edit (Rubriq) merged into the manuscript: commas, spelling variants and wording-neutral substitutions only; no change to results or claims. A computational study of a phenomenological model. No experiment was performed and the model is not calibrated to any c...

Damage-repair kinetics and phase stiffness in a site-diluted XY model: implications for irradiated superconductors

Version v3. Adds a subsection on experimental validation using fission-reactor irradiation (Section 4.5), softens two statements of the abstract, and removes a reference to separate work. A computational study of a phenomenological model. No experiment was performed and the model...

Damage-repair kinetics and phase stiffness in a site-diluted XY model: implications for irradiated superconductors

A computational study of a phenomenological model. No experiment was performed and the model is not calibrated to any conductor. Prepared for submission to Superconductor Science and Technology. A two-dimensional XY lattice of the local superconducting phase, in which sites are d...

Consistency Testing of an Integrated SWRO-Brine Valorization Architecture: Alkalinity as the Binding Constraint

This version reverses the conclusions of the previous one. Peer review identified two errors in the earlier analysis; correcting them removes both the claimed energy advantage over conventional SWRO and the favorable levelized cost. The brine concentrator as originally specified...

Consistency Testing of an Integrated SWRO-Brine Valorization Architecture: Alkalinity as the Binding Constraint

This version reverses the conclusions of the previous one. Peer review identified two errors in the earlier analysis; correcting them removes both the claimed energy advantage over conventional SWRO and the favorable levelized cost. The brine concentrator as originally specified...

Consistency Testing of an Integrated SWRO-Brine Valorization Architecture: Alkalinity as the Binding Constraint

This version reverses the conclusions of the previous one. Peer review identified two errors in the earlier analysis; correcting them removes both the claimed energy advantage over conventional SWRO and the favorable levelized cost. The brine concentrator as originally specified...

Self-Maintained Order and Hysteretic Collapse in a Non-Equilibrium Rotational Lattice

Version 9, revised for Physica A. A two-dimensional rotor lattice whose ordering couplings are removed by an order-dependent flux and restored by repair. The mean-field reduction is bistable above a computed feedback threshold; version 9 adds a kinetic Monte Carlo study designed...

Toward transparent rigid packaging from sugarcane bagasse: a consistency-testing framework for nanocellulose-chitosan sheets

A theoretical and computational study. No experiments were performed; every parameter is taken from a verified literature source or stated as an assumption, and every output is a screening estimate rather than a prediction of material behaviour. Prepared for submission to Cellulo...

Toward transparent rigid packaging from sugarcane bagasse: a consistency-testing framework for nanocellulose-chitosan sheets

A theoretical and computational study. No experiments were performed; every parameter range is traced to a cited source or stated as an assumption, and every output is a screening estimate rather than a prediction of material behaviour. Prepared for submission to Cellulose (Sprin...

Toward transparent rigid packaging from sugarcane bagasse: a consistency-testing framework for nanocellulose-chitosan sheets

A theoretical and computational study. No experiments were performed; every parameter range is traced to a cited source or stated as an assumption, and every output is a screening estimate rather than a prediction of material behaviour. Prepared for submission to Cellulose (Sprin...

Toward transparent rigid packaging from sugarcane bagasse: a consistency-testing framework for nanocellulose-chitosan sheets

A theoretical and computational study. No experiments were performed; every parameter range is traced to a cited source or stated as an assumption, and every output is a screening estimate rather than a prediction of material behaviour. Prepared for submission to Cellulose (Sprin...

Consistency Testing of an Integrated SWRO-Brine Valorization Architecture: Alkalinity as the Binding Constraint

This version reverses the conclusions of the previous one. Peer review identified two errors in the earlier analysis; correcting them removes both the claimed energy advantage over conventional SWRO and the favorable levelized cost. The brine concentrator as originally specified...

Automated bolting and head handling for multi-flange pressure-vessel closures: a simulation-based design evaluation with a delayed-coking case study

Large bolted closures on process vessels are still assembled largely by hand, often in hazardous areas, using multipass tightening sequences whose duration and preload outcome are rarely quantified. An automated architecture for such closures is evaluated in this paper: orbital p...

From Classification Accuracy to Decision Value: Multimodal Sensor Fusion for Economic Prioritization of Landfill Mining — A Simulation-Based Value-of-Information Analysis

A simulation-based methodology paper. No field, laboratory or test-bed data were used; every performance figure is a model prediction from a synthetic, physically motivated but unvalidated model. Submitted to Environmental Monitoring and Assessment. An architecture for pre-excava...

From Classification Accuracy to Decision Value: Multimodal Sensor Fusion for Economic Prioritization of Landfill Mining — A Simulation-Based Value-of-Information Analysis

A simulation-based methodology paper. No field, laboratory or test-bed data were used; every performance figure is a model prediction from a synthetic, physically motivated but unvalidated model. Submitted to Environmental Monitoring and Assessment. An architecture for pre-excava...