Note. Bleekeria compta: A New Binomial for a Hawaiian Apocynaceous Tree

Volume: 20Start Page: 260End Page: 26

Let\u27s Keep The Glow In Old Glory : And the Free in Freedom Too

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Nutrient Losses From Conventional and No-Till Cornfields

Farmers must be concerned about both the monetary loss and the threat of groundwater and surface water pollution associated with the loss of plant nutrients from their fields. There is also an increasing public concern about pollution and the role of agriculture in nonpoint-source pollution. Movement of water over the surface of the soil as well as through the soil profile increases the potential for loss of water-soluble nutrients, especially nitrates

Seal Technology for Liquid Oxygen (LOX) Turbopumps

Two types of advanced seals for liquid oxygen (LOX) turbopumps were investigated. One was a spiral-groove face seal whose function is to seal high-pressure LOX at the impeller end of the turbopump. The other was a floating-ring, Rayleigh-step, helium buffered seal used to prevent LOX ingress to the turbine side of the unit. For each seal type, two sizes were investigated (50 and 20 mm). A turbine-driven test rig was designed and manufactured, and a test program was completed on the 50 mm floating-ring, Rayleigh-step, helium buffered seal. Significant results were: vaporization in the flow path could cause failure by overheating; therefore, the spiral-groove pumping portion of the seal that provides the fluid film must circulate fluid without disruption if vaporization occurs in the sealing dam. This is successfully accomplished by a pressure-balanced spiral-groove concept that is described. The spiral-groove configuration is affected by turbulence in the fluid film and pressure drops due to fluid inertia at sudden contractions. The net results of these effects are deep grooves, large operating films, and high power loss when compared against seals operating with laminar films. Turbulence and inertia are induced by the high-density and low-viscosity characteristics of LOX. The program clearly pointed out the need to consider system environmental factors such as thermal and centrifugal distortions and rotor vibrations in the seal design

Framing diabetes public health information during Ramadan – a newspaper content analysis

Objective: To evaluate health-related messages in printed media pertaining to diabetes care in Qatar during Ramadan. Methods: Qatar national newspapers (Arabic and/or English) published 6 weeks prior to and 4 weeks during Ramadan 2012 were reviewed. Health-related content was identified and characterized according to four different categories including presence of messages pertaining to both diabetes and Ramadan. Articles describing diabetes and Ramadan combined were further evaluated according to specific features of prominence (surrogates for perceived reader importance). Newspapers were grouped by language, and volume and content of coverage were compared between groups. Results: A total of 1 467 newspaper issues published during the 2012 review period (781 in Arabic and 686 in English) were analysed. Health-related articles appeared consistently throughout the study period, but few were specifically diabetes-related (66/1095 [6%] Arabic articles versus 34/1250 [2.7%] English articles; P = 0.008). Only 34/1095 (3.1%) Arabic and 23/1 250 (1.8%) English (P = 0.05) articles pertaining specifically to diabetes management during Ramadan were published. Twenty/34 (59%, Arabic) and 6/23 (26%, English) were published in high prominence positions. Conclusions: Opportunity exists to augment the relatively low coverage of diabetes health-related messages in print media during Ramadan. - 2017, - The Author(s) 2017.Scopu