The aspect sensitivity of VHF echoes from field aligned irregularities (FAI) within meteor trails and thin ionization layers is studied using numerical models. Although the maximum power is obtained when a radar is pointed perpendicular to the field line (⊥B), substantial power can be obtained off the⊥B direction if the ionization trail/layer is thin. When the FAI length along B is 20 m, the po...

Femoroacetabular impingement (FAI), sometimes termed acetabular rim syndrome, results from chronic mechanical abutment between the femoral head-neck junction and the acetabulolabral complex. Orthopedists have begun to recognize FAI as a cause of pain, instability and progressive hip dysfunction. Because FAI is implicated in the development of osteoarthritis in young individuals, orthopedists ha...

BACKGROUND Gait is abnormal in patients with femoroacetabular impingement (FAI). To date, studies have not correlated radiographic FAI morphology with gait abnormalities. HYPOTHESIS Gait abnormalities in FAI patients will be associated with radiographic FAI morphology. STUDY DESIGN Cross-sectional study. LEVEL OF EVIDENCE Level 4. METHODS Patients with symptomatic FAI (n = 20) underwent...

BACKGROUND Two of the most common causes of groin pain in athletes are femoroacetabular impingement (FAI) and athletic pubalgia. An association between the 2 is apparent, but the prevalence of radiographic signs of FAI in patients undergoing athletic pubalgia surgery remains unknown. The purpose of this study was to determine the prevalence of radiologic signs of FAI in patients with athletic p...

In the study of state fai/ure, scholars and practitioners have mostly focused on macro-level indicators to determine which state isfailed and which is not. This focus overlooks cruciallocal and regional variation that has to be taken into account when designing interventions. In this article, we develop a new approach to examine state fai/ure on this microlevel. Using a unique data-set on Somal...

Many researchers have developed various measures to evaluate the functional status of community-dwelling elderly. The Frenchay Activities Index (FAI) was developed to measure instrumental activities of daily living in stroke populations. The FAI has undergone the most intensive evaluation, but its factor structure has not been examined in Japan. The primary purpose of this study was to investig...

We report simultaneous observations of atmospheric gravity waves (AGW) in OI (557.7 nm) and OH airglow images and VHF radar backscatter from field-aligned irregularities (FAI) in the E-region during the SEEK-2 (Sporadic-E Experiment over Kyushu 2) campaign period from 29 July to 9 August 2002. An all-sky imager was operated at Nishino-Omote (30.5 N, 130.1 E), Japan. On 14 nights, 17 AGW events ...

BACKGROUND Functional adrenal insufficiency (FAI) is associated with increased mortality and is defined as subnormal cortisol production during acute severe illness. METHODS After screening 200 adult patients admitted in the medical emergency unit of Mulago Hospital, Kampala, Uganda, 113 critically ill HIV-infected adults not receiving corticosteroids were enrolled after obtaining informed co...