Superoptimal Preconditioned Conjugate Gradient Iteration for Image Deblurring

We study the superoptimal Frobenius operators in the two-level circulant algebra. We consider two specific viewpoints: ( 1) the regularizing properties in imaging and ( 2) the computational effort in connection with the preconditioned conjugate gradient method. Some numerical experiments illustrating the effectiveness of the proposed technique are given and discussed

Free boundary problems for Tumor Growth: a Viscosity solutions approach

The mathematical modeling of tumor growth leads to singular stiff pressure law limits for porous medium equations with a source term. Such asymptotic problems give rise to free boundaries, which, in the absence of active motion, are generalized Hele-Shaw flows. In this note we use viscosity solutions methods to study limits for porous medium-type equations with active motion. We prove the uniform convergence of the density under fairly general assumptions on the initial data, thus improving existing results. We also obtain some additional information/regularity about the propagating interfaces, which, in view of the discontinuities, can nucleate and, thus, change topological type. The main tool is the construction of local, smooth, radial solutions which serve as barriers for the existence and uniqueness results as well as to quantify the speed of propagation of the free boundary propagation

Subchondroplasty in the treatment of bone marrow lesions of the knee: Preliminary experience on first 15 patients

Purpose The aim of this prospective study was to assess the effectiveness in terms of pain relief and functional improvement of the Subchondroplasty procedure in the treatment of osteoarthritis-related bone marrow lesions (BMLs) of the knee. Methods The study included first 15 consecutive patients undergone to Subchon-droplasty procedure for the treatment of chronic degenerative BMLs in which previous conservative treatment have failed. Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores, Knee Injury and Osteoarthritis Outcome Scores (KOOS), and visual analog scale (VAS) pain scores were obtained preoperatively and at 1, 6, and 12 months of follow-up. Results WOMAC scores significantly improved from 39.7 \ub1 20.2 before surgery to 26.8 \ub1 16.1 at the 1-month follow-up (p = 0.045). A further significant improvement to 15.5 \ub1 12.7 (p = 0.02) and to 8.6 \ub1 3.1 (p <0.01) was obtained both at 6-month and at 1-year follow-up. KOOS scores improved significantly from 47.5 \ub1 16.6 before surgery to 65.4 \ub1 14.9 at 1 month (p = 0.013) and to 80.4 \ub1 15.1 at 6-month follow-up (p = 0.01). A further improvement to 85.6 \ub1 15.1 was recorded 1 year postoperatively, although nonsignificant. VAS score showed a significant improvement from 55.8 \ub1 20.5 preoperatively to 36.2 \ub1 16.9 at 1 month (p = 0.008) and to 18.2 \ub1 17.3 at 6-month follow-up (p = 0.005). This further improved to 12.8 \ub1 17.9 at 1-year follow-up, although not significantly. Conclusion Subchondroplasty procedure represents a safe and valid surgical option in the treatment of osteoarthritis-related BMLs of the knee, providing an improvement in terms of pain relief and functional recovery. Longer studies are required to evaluate how long these improvements may last. Level of Evidence Therapeutic case-series, Level IV study

The new journal ranking is out — and industrial marketing management continues to progress

No abstract available.http://www.elsevier.com/locate/indmarmanhj2023Gordon Institute of Business Science (GIBS

Editorial : Best business-to-business marketing management Ph.D. thesis 2023

Industrial Marketing Management (IMM) is the leading outlet for theoretical, empirical, and case-based research geared to the needs of marketing scholars and practitioners researching and working in industrial and business-to-business markets. The journal's global reach is evidenced by the fact that international scholars and practitioners from all regions of the globe share their latest findings for improving effectiveness and efficiency of industrial markets. This comprehensive approach has helped to keep readers abreast of the timeliest research and practice necessary for better marketing decisions and strategy in global industrial and business-to-business markets.http://www.elsevier.com/locate/indmarmanhj2023Gordon Institute of Business Science (GIBS

The future of Industrial Marketing Management

No abstract available.http://www.elsevier.com/locate/indmarman2019-02-01hj2018Gordon Institute of Business Science (GIBS

How to balance like an academic

The academic's tasks are usually succinctly described as research, teaching, and service. To be successful in one's career, each of these must be kept in balance, and prioritized correctly. This is challenging, as the tasks usually are running in parallel, all are time demanding, and any one task can become overwhelming as deadlines approach. We first take a deeper look at the various tasks that must be balanced by the academic. Following that discussion, we provide a series of suggestions for how junior academics can become good at prioritization and other skills that help them achieve the desired balance between the tasks of research, teaching, and service, and between work and personal life.http://www.elsevier.com/locate/indmarman2021-07-01hj2020Gordon Institute of Business Science (GIBS