The concept of stress

Any notion or concept of stress should fulfil the following requirements. First, the definition should be readily communicable both to professionals and the community at large. Second, the concept should be readily converted into constructs which are suitable for research. In this latter regard it is easier to present and discuss a stress model. This model differentiates a number of factors which, although interdependent, are conceptually distinct. By adequately discriminating between these factors, operational criteria may be defined and a systematic assessment of the effects of stress will be facilitated. A model is thus presented which describes the stress process.     

Small, asymptomatic angiomyolipomas of the kidney

Ultrasound (US) detected 27 small, asymptomatic renal angiomyolipomas in 18 patients. Twenty-five lesions were diffusely hyperechoic and 2 were heterogeneous. Nephrotomography was positive in 8 out of 12 patients (67%), CT in 12/14 (86%), and angiography in 10/14 (71%). Percutaneous fine-needle biopsy confirmed the diagnosis in 8 out of 12 patients (67%). Nephrotomography and angiography were nonspecific, whereas CT and biopsy were most specific because of the presence of fatty tissue. Angiography helped clarify the degree of vascularity of the masses. If the diagnosis can be made preoperatively, more conservative management can be undertaken.     

Extracranial tumor vascularity: determination by dynamic CT scanning. Part II: The unit approach

Twenty-eight patients had combined conventional drip infusion CT scans. The information about the anatomic location of the lesion, its configuration, its cross-sectional appearance, its vascularity (as determined by dynamic signature curves), and its clinical presentation were considered as a single overall unit. This diagnostic approach allowed a diagnosis to be made on virtually all of these enhancing lesions without resorting to either a digital venous imaging study or angiographic procedure. In 17 of these cases, such an invasive second procedure was performed either to confirm the CT impression as part of this study or as part of a therapeutic embolization procedure.     

A model of the pre-assessment learning effects of assessment is operational in an undergraduate clinical context

Background

The Public Health (PH) course at the medical college of Cairo University is based on traditional lectures. Large enrollment limits students' discussions and interactions with instructors.

Aim

Evaluate students' learning outcomes as measured by improved knowledge acquisition and opinions of redesigning the Reproductive Health (RH) section of the PH course into e-learning and assessing e-course utilization.

Methods

This prospective interventional study started with development of an e-learning course covering the RH section, with visual and interactive emphasis, to satisfy students' diverse learning styles. Two student groups participated in this study. The first group received traditional lecturing, while the second volunteered to enroll in the e-learning course, taking online course quizzes. Both groups answered knowledge and course evaluation questionnaires and were invited to group discussions. Additionally, the first group answered another questionnaire about reasons for non-participation.

Results

Students participating in the e-learning course showed significantly better results, than those receiving traditional tutoring. Students who originally shunned the e-course expressed eagerness to access the course before the end of the academic year. Overall, students using the redesigned e-course reported better learning experiences.

Conclusions

An online course with interactivities and interaction, can overcome many educational drawbacks of large enrolment classes, enhance student's learning and complement pit-falls of large enrollment traditional tutoring.