Effect of using Austrian pine cones powder as an additive on oil well cement properties.

There have been many investigations to improve both the physical and mechanical properties of oil well cement using a wide range of materials. Most of these additives are expensive and practically ineffective. In this article, a comprehensive evaluation was conducted for using Austrian pinecones powder (APCP) as an inexpensive supplementary cementing material (SCM) for well cement.

Association of Flying Time with Hearing Loss in Military Pilots.

Background: Military pilots are exposed to harmful noise levels, and the two possible effects of this are hearing loss and tinnitus.

Objective: This study was conducted to determine the prevalence of noise-induced hearing loss among Saudi military pilots and to determine its association with total flight hours and aircraft type (i.e.

Too little appreciation for great expenditure? Workload and resources in ICUs.

Purpose: The aim of this study was providing descriptive information and the comparative examination of job strain and mental health of nurses and physicians in different intensive care units (ICU).

Methods: The Effort-Reward Imbalance Questionnaire by Siegrist and standardized psychometric questionnaires, like Hospital Anxiety and Depression Scale, Impact of Event Scale, Brief Symptom Inventory, Social Support Questionnaire, and Life Satisfaction Questionnaire were used. Five ICUs of the same German medical school were included (N = 142).