Laser-Sintering of Cyclic Olefine Copolymer for Low Dielectric Loss Applications.

With increasing demands for data transfer, the production of components with low dielectric loss is crucial for the development of advanced antennas, which are needed to meet the requirements of next-generation communication technologies. This study investigates the impact of a variation in energy density on the part properties of a low-loss cyclic olefin copolymer (COC) in the SLS process as a way to manufacture complex low-dielectric-loss structures. Through a systematic variation in the laser energy, its impact on the part density, geometric accuracy, surface quality, and dielectric properties of the fabricated parts is assessed.

A Dyciandiamine-Based Methacrylate-Epoxy Dual-Cure Blend-System for Stereolithography.

In this research, an epoxy-based dual-cure system is developed and characterized for SLA additive manufacturing. Dual-cure systems consist of UV-curable acrylates and thermal active components. The second curing step offers an additional degree of freedom to design specific material properties.

Predictors of a medical-offset effect among patients receiving antidepressant therapy.

Objective: Characteristics of patients receiving antidepressant therapy were examined to identify factors that may be associated with a medical-offset effect.

Method: In a retrospective study, the authors analyzed claims data from a large health insurer in New England. The study subjects included 1,661 persons initiating treatment for depression with selective serotonin reuptake inhibitors or tricyclic antidepressants between July 1991 and June 1993.