6,508 research outputs found
Renowned pianist visits U-M students on October 4, 2007
No full textU-M Department of Music offers upclose interaction with preeminent pianist. Steven Whiting, Associate Dean for Graduate Studies at the School of Music, Theatre and Dance, discusses the visit of renowned pianist Andras Schiff to U-M on October 4, 2007http://deepblue.lib.umich.edu/bitstream/2027.42/84950/1/Sonata_mixdown.mp
The validity of Blue Zones demography: a response to critiques
No full text: Blue Zones are geographically and temporally defined areas with a history of disproportionately high concentrations of nonagenarians and centenarians. Nearly two decades ago, these zones gained international attention when the Blue Zone term was introduced in seminal articles published in Experimental Gerontology and National Geographic. Since then, numerous scientific papers have extracted valuable insights into human health from investigating the long-lived people who live there. However recently, validity of the ages of people living in the Blue Zones has been questioned. Here, we address these concerns by describing in detail the age validation process undertaken in Blue Zones and comparing it to the prevailing standards in gerontological demography. As discovered a century and a half ago, most self-reported claims of exceptional longevity are false. However, using methods developed by gerontological demographers over the past decades, the true age of people claiming exceptional longevity can be determined by cross-checking multiple independent documentary sources. This procedure minimizes, and usually eliminates, errors due to fraud, honest mistakes, poor memory, or identity switches, especially between homonymous siblings. All Blue Zones described herein have been extensively validated based on thoroughly cross-checked data from multiple independent sources plus state-of-the-art demographic methods. Consequently, age data from these Blue Zones are valid and reliable
Author Correction: The future of Blue Carbon science
No full textCorrection to: Nature Communications https://doi.org/10.1038/s41467-019-11693-w, published online 05 September 2019.
The original version of this Article contained an error in the author affiliations.
Affiliation 24 incorrectly read ‘School of Applied Sciences, Edinburgh University, Edinburgh EH11 4BN, UK’
This has now been corrected in both the PDF and HTML versions of the Article.Full Tex
Does Church Attendance Cause People to Vote? Using Blue Laws' Repeal to Estimate the Effect of Religiosity on Voter Turnout
No full textRegular church attendance is strongly associated with a higher probability of voting. It is an open question as to whether this association, which has been confirmed in numerous surveys, is causal. We use the repeal of the laws restricting Sunday retail activity ("Blue laws") to measure the effects of church-going on political participation. The repeal of Blue Laws caused a 5 percent decrease in church attendance. We measure the effect of Blue Laws' repeal on political participation and find that following the repeal turnout falls by approximately 1 percentage point. This turnout decline, which is statistically significant and fairly robust across model specifications, is consistent with the large effect of church attendance on turnout reported in the literature, and suggests that church attendance may have significant causal influence on voter turnout.
Current distribution and population size of the Blue Swallow Hirundo atrocaerulea in the southern Tanzanian highlands
No full textTwo surveys of Blue Swallows were conducted in the southern Tanzanian highland grasslands in order to determine the habitat preferences and estimate the size of this subpopulation. During the 2008/09 and 2012 surveys, a total distance of 3 635 km was travelled in search of Blue Swallows (at an altitude of above 1 400 m above sea level). Blue Swallows showed no preference for any altitude range above 1 400 m. The Blue Swallows showed a preference for natural pastures and for rural villages interspersed with crops and natural pasture. The buildings in the rural villages provide the nesting sites and, in close proximity, the crops, natural pastures, livestock and their dung possibly provide the food source for the aerial arthropods on which the Blue Swallows feed. In total, 151 Blue Swallows were recorded consisting of 62 males, 68 females and 21 unsexed individuals at 62 localities. These data along with environmental variables were used to construct an ecological niche model for the Blue Swallow. It was estimated that a mean of 12 791 km2 of suitable habitat was available for Blue Swallows. The 151 Blue Swallows recorded within the maximum perpendicular distance of 262 m on either side of the survey route resulted in a subpopulation estimate of 1 014 (338 to 507 pairs) Blue Swallows in the southern Tanzanian highland grasslands (12 791 km2). Mean densities were 0.023 to 0.035 pairs km − 2. A density of 0.13 pairs km − 2 recorded on a cattle farm consisting primarily of grasslands and wetlands was similar to the density of pairs found on sites in South Africa and Swaziland of compara- ble size and with matching characteristics to this site in Tanzania. Based on this new information the global Blue Swallow population estimate is updated to between 1 169 and 1 338 pair
New Deep-Blue-Emitting Ce-Doped A<sub>4- m</sub>B<sub>n</sub>C<sub>19+2 m</sub>X<sub>29+ m</sub> (A = Sr, La; B = Li; C = Si, Al; X = O, N; 0 ≤ m ≤ 1; 0 ≤ n ≤ 1) Phosphors for High-Color-Rendering Warm White Light-Emitting Diodes
No full textA new sialon Eu3.60LiSi13.78Al6.03O6.82N22.59 has been discovered via the single-particle diagnosis approach. Its crystal structure (space group P3m1) was solved and refined from single-crystal X-ray diffraction data. It has the interesting feature of two types of disorder at the Eu2 site: positional disorder (Eu2a/Eu2b) and substitutional disorder with (Si/Al)2(O/N). The structure is generalized to the formula A4-mBnC19+2mX29+m (A = Sr, La, Eu, Ce; B = Li; C = Si, Al; X = O, N; 0 ≤ m ≤ 1; 0 ≤ n ≤ 1), of which Sr3.61LiSi14.27Al5.61O6.19N23.25 (Sr-sialon, m = 0.41, n = 1) and La2.85Sr0.76LiSi14.86Al4.93O2.89N26.51 (LaSr-sialon, m = 0.40, n = 1) are two examples that have been obtained as a single-phase powder. Sr-sialon:Eu and LaSr-sialon:Eu both show blue to yellow emission, depending on the Eu concentration, whereas Sr-sialon:1% Ce shows a deep-blue emission band centered at 422 nm with a full width at half-maximum of 80 nm and an internal quantum efficiency of 80% (λex = 355 nm). The latter phosphor has very good thermal stability of both emission intensity and color. A white light-emitting diode (LED) containing the newly discovered Sr-sialon:5% Ce as the blue phosphor component shows excellent color-rendering indices (Ra = 96 and R12 = 97) with a correlated color temperature of 4255 K. This indicates that Sr-sialon:Ce is a highly promising deep-blue phosphor for illumination grade white LEDs.Accepted Author ManuscriptChemE/Product and Process Engineerin
Author Correction: The future of Blue Carbon science
No full textAuthor Correction: The future of Blue Carbon scienc
Blue carbon sequestration potential in Zostera marina eelgrass beds of the K'omoks Estuary, British Columbia
No full textGreenhouse gases, as a significant cause of global climate change, are the highest in history. Coastal ecosystems are said to contribute to climate change mitigation by sequestering significant amounts of blue carbon. Disconcertingly, seagrasses are experiencing global extent loss. Using dated sediment cores, the potential for carbon sequestration was assessed in Zostera marina eelgrass bed sediments of the K’ómoks Estuary. Some of the assessed areas are found to be non-depositional. In areas of deposition the sediment accumulation rate is 0.23 to 0.78 g cm-2 yr-1, and the carbon concentration range in buried sediment is 0.06 to 0.22%. Carbon accumulation rates are 0 to 1.3x10-3 gC cm-2 yr-1, lower than in nearby Strait of Georgia. The K’ómoks Estuary is a disturbed site. The calculated area weighted average carbon sequestration rate for the K’ómoks Estuary is 1.18x 10-5 tC m-2 yr-1. At this rate, the author suggests these northwest Pacific Ocean eelgrass beds do not sequester carbon at the global rates anticipated by previous work. Protection of all estuarine ecosystems will also provide important ecological benefits
Current conservation status of the Blue Swallow Hirundo atrocaerulea Sundevall 1850 in Africa
No full textThe global Blue Swallow Hirundo atrocaerulea was classified as Vulnerable in 2010 on account of its small and rapidly declining population estimated at less than 1 500 pairs. We undertook this study to gain a better understanding of the current status and threats facing this migratory species. Three previously unknown areas that might be part of the species' non-breeding range were identified in Kenya and northern Tanzania. Within its breeding range we identified three previously unknown areas of potentially suitable habitat, one in Tanzania and two in Malawi, which require further exploration. Population viability assessment predicted that the Blue Swallow population will decline by 8% in 10 years. The overall probability of extinction of the species in the wild is 3%. Minimum viable population size analysis suggests that a goal for the long-term conservation of the Blue Swallow should be to mitigate current threats that are driving declines such that the population increases to a minimum of 3 600 individuals. This should consist of at least 900 individuals in each of the four clusters identified, along with a minimum of 500 individuals in at least one of the meta-populations per cluster. The four clusters are located in (1) the southeasten Democratic Republic of the Congo, (2) highlands of southern Tanzania and northern Malawi, (3) eastern highlands of Zimbabwe and (4) South Africa and Swaziland. The current proportions of the Blue Swallow population in strictly protected and unprotected areas on their breeding grounds are 53% and 47%, respectively, whereas on their non-breeding grounds the corresponding percentages are 25% and 75%, respectively. Our reassessment of the Blue Swallow's risk of extinction indicates that it continues to qualify as Vulnerable according to the IUCN/SSC criteria C2a(i
Betanodavirus meningoencephalitis in an Atlantic blue marlin
No full textViral nervous necrosis (viral encephalopathy and retinopathy) is caused by piscine nodavirus (Nodaviridae, Betanodavirus). Since 1986, this highly infectious virus has caused mass mortalities of up to 100% in farmed saltwater and freshwater fish around the world (with the exception of South America and Antarctica), affecting >60 species across 10 orders. The Atlantic blue marlin (Makaira nigricans Lacépède, 1802) is a top-level predator found throughout the tropical waters of the Atlantic and Indo-Pacific oceans. Despite their popularity as a sportfish, relatively little is known about the Atlantic blue marlin and other billfish. We describe here chronic betanodavirus infection in a juvenile Atlantic blue marlin, which is, to our knowledge, the first report of disease in M. nigricans
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