A fresh perspective on canonical extensions for bounded lattices

This paper presents a novel treatment of the canonical extension of a bounded lattice, in the spirit of thetheory of natural dualities. At the level of objects, this can be achieved by exploiting the topological representation due to M. Ploscica, and the canonical extension can be obtained in the same manner as can be done in the distributive case by exploiting Priestley duality. To encompass both objects and morphismsthe Ploscica representation is replaced by a duality due to Allwein and Hartonas, recast in the style of Ploscica's paper. This leads to a construction of canonical extension valid for all bounded lattices,which is shown to be functorial, with the property that the canonical extension functor decomposes asthe composite of two functors, each of which acts on morphisms by composition, in the manner of hom-functors

Veterans’ Experiences with Combat-Related PTSD Treatment

The purpose of this study was to explore from Veterans’ perspectives, their experiences with combat-related post traumatic stress disorder (PTSD) treatment and to report their advice to social workers involved in treating Veterans. This subject has particular importance given the increasing number of Veterans who have returned and are currently returning from deployments in Iraq and Afghanistan with this diagnosis. Interviews were conducted with four subjects, all of whom had been deployed to a combat zone, were diagnosed with combat-related PTSD, and completed outpatient treatment prior to July 1, 2012. The interviewees discussed their experiences with PTSD treatment and offered advice to social workers who treat Veterans with combat-related PTSD. Two Veterans experienced more re-experiencing symptoms, such as dreams, after treatment. Avoidance symptoms among the Veterans in this study included avoiding treatment, avoiding people, and avoiding military duty. The findings confirmed that arousal symptoms, specifically irritability, are often triggered by common daily events, such as a camera flash, a tractor backfiring, or a neighbor’s knock on the front door. All participating Veterans reported that their treatment was positively affected by family or friend-based support systems. The implications for social workers include providing liaison-type services between doctors and Veterans and engaging and supporting family members in the treatment and recovery process. Additionally, the Veterans in this study implied an importance to the social worker having shared experiences with the Veteran