41 research outputs found
Space suit
A pressure suit for high altitude flights, particularly space missions is reported. The suit is designed for astronauts in the Apollo space program and may be worn both inside and outside a space vehicle, as well as on the lunar surface. It comprises an integrated assembly of inner comfort liner, intermediate pressure garment, and outer thermal protective garment with removable helmet, and gloves. The pressure garment comprises an inner convoluted sealing bladder and outer fabric restraint to which are attached a plurality of cable restraint assemblies. It provides versitility in combination with improved sealing and increased mobility for internal pressures suitable for life support in the near vacuum of outer space
The use of arm vein in lower-extremity revascularization: Results of 520 procedures performed in eight years
AbstractPurpose: The absence of an adequate ipsilateral saphenous vein in patients requiring lower-extremity revascularization poses a difficult clinical dilemma. This study examined the results of the use of autogenous arm vein bypass grafts in these patients. Methods: Five hundred twenty lower-extremity revascularization procedures performed between 1990 and 1998 were followed prospectively with a computerized vascular registry. The arm vein conduit was prepared by using intraoperative angioscopy for valve lysis and identification of luminal abnormalities in 44.8% of cases. Results: Seventy-two (13.8%) femoropopliteal, 174 (33.5%) femorotibial, 29 (5.6%) femoropedal, 101 (19.4%) popliteo-tibial/pedal, and 144 (27.7%) extension “jump” graft bypass procedures were performed for limb salvage (98.2%) or disabling claudication (1.8%). The average age of patients was 68.5 years (range, 32 to 91 years); 63.1% of patients were men, and 36.9% of patients were women. Eighty-five percent of patients had diabetes mellitus, and 77% of patients had a recent history of smoking. The grafts were composed of a single arm vein segment in 363 cases (69.8%) and of spliced composite vein with venovenostomy in 157 cases (30.2%). The mean follow-up period was 24.9 months (range, 1 month to 7.4 years). Overall patency and limb salvage rates for all graft types were: primary patency, 30-day = 97.0% ± 0.7%, 1-year = 80.2% ± 2.1%, 3-year = 68.9% ± 3.6%, 5-year = 54.5% ± 6.6%; secondary patency, 30-day = 97.0% ± 0.7%, 1-year = 80.7% ± 2.1%, 3-year = 70.3% ± 3.4%, 5-year = 57.5% ± 6.2%; limb salvage, 30-day = 97.6% ± 0.7%, 1-year = 89.8% ± 1.7%, 3-year = 82.1% ± 3.3%, 5-year = 71.5% ± 6.9%. Secondary patency and limb salvage rates were greatest at 5 years for femoropopliteal grafts (69.8% ± 12.8%, 80.7% ± 11.8%), as compared with femorotibial (59.6% ± 10.3%, 72.7% ± 10.5%), femoropedal (54.9% ± 25.7%, 56.8% ± 26.9%,) and popliteo-tibial/pedal grafts (39.0% ± 7.3%, 47.6% ± 15.4%). The patency rate of composite vein grafts was equal to that of single-vein conduits. The overall survival rate was 54% at 4 years. Conclusion: Autogenous arm vein has been used successfully in a wide variety of lower-extremity revascularization procedures and has achieved excellent long- and short-term patency and limb salvage rates, higher than those generally reported for prosthetic or cryopreserved grafts. Its durability and easy accessibility make it an alternative conduit of choice when an adequate saphenous vein is not available. (J Vasc Surg 2000;31:50-9.
Comparative analysis of the top six and bottom six teams’ corner kick strategies in the 2015/2016 English Premier League
This study compared the corner kick strategies employed by the top six and
bottom six teams across 120 matches of the 2015/2016 English Premier League
Season. In total, 2,303 corner kicks were examined by univariate analyses
individual χ2 and bivariate analyses with contingency tables (χ2 and association measures). Top six teams favoured an outswinging delivery, whilst the bottom six teams favoured inswinging deliveries (p < 0.001). Top six teams operated a dynamic attacking organisation during ball deliveries, (p < 0.001), whereas the bottom six operated static and dynamic attacking strategies in equal measure. Top six teams took corner kicks frequently when winning or drawing, whereas bottom
six teams took most corner kicks when losing or drawing (match status, p <
0.001). Bivariate analyses identified that goals were scored from corner kicks
when attacking organisation was dynamic, two defenders were on the posts and
the score line was level (p < 0.05). Results supplement the design of practice
tasks that afford successful corner kicks in training and game play scenarios
Smoking initiation is followed by the early acquisition of epigenetic change in cervical epithelium: a longitudinal study
background: To prove a causal link between an epigenetic change and an environmental or behavioural risk factor for a given disease, it is first necessary to show that the onset of exposure precedes the first detection of that epigenetic change in subjects who are still free of disease.
methods: Towards this end, a cohort of women aged 15–19 years, recruited soon after they first had sexual intercourse, were used to provide sequential observations on the relationship between cigarette smoking and the detection in cervical cytological samples of methylated forms of CDKN2A (p16) using nested methylation-specific polymerase chain reaction.
results: Among women who remained cytologically normal and who tested negative for human papillomavirus DNA in cervical smears during follow-up, those who first started to smoke during follow-up had an increased risk of acquiring CDKN2A methylation compared with never-smokers (odds ratio=3.67; 95% confidence interval 1.09–12.33; P=0.04).
conclusion: Smoking initiation is associated with the appearance of methylated forms of CDKN2A
What Performance Analysts Need to Know About Research Trends in Association Football (2012–2016): A Systematic Review
Evolving patterns of match analysis research need to be systematically reviewed regularly since this area of work is burgeoning rapidly and studies can offer new insights to performance analysts if theoretically and coherently organized
Ocean City, Maryland, circa 1981-2000
Photograph of crowded beach at Ocean City, Maryland, circa 1981-2000. Caption reads: "Palm trees in Ocean City — you bet — look in front of the Ocean Club at 49th Street on the beach." Postcard number: 491-88
North Ocean City, Maryland, circa 1975-1980
North Ocean City, Maryland, circa 1975-1980. Caption reads: "A view of the towering condominiums in North Ocean City, Maryland." Message reads: "The Pyramid-9500 Coastal Highway" Postcard number: KV8445-13, 128-76; Message included
Knapps Narrows Bridge, Tilghmans Island, Maryland, circa 1961-1976
Knapps Narrows Bridge, Tilghmans Island, Maryland, circa 1961-1976. Postmark date: December 20, 1976; Postcard number: 116-75; Message included
Quality Inn Boardwalk, Ocean City, Maryland, circa 1971-1990
Quality Inn Boardwalk, Ocean City, Maryland, circa 1971-1990. Caption reads: "Air conditioned and heated. Color TV in every room. Indoor and outdoor heated pools, complimentary whirl pool & Sauna bath. 140 Ocean front units with balconies and sliding glass doors for perfect viewing. 20 large luxurious side view units. Restaurant, Coffee Shop, miniature golf, Bike Rentals, Gift and Antique Shops. Open All Year!
Ocean City, Maryland, circa 1981-1992
Ocean City, Maryland. Caption reads: "A section of the long and popular boardwalk at Ocean City, Maryland." Circa 1981-1992. Postmark date: July 29, 1992; message included