65,120 research outputs found

    The subzero microbiome: Microbial activity in frozen and thawing soils

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    Most of the Earth's biosphere is characterized by low temperatures (<5 °C) and cold-adapted microorganisms are widespread. These psychrophiles have evolved a complex range of adaptations of all cellular constituents to counteract the potentially deleterious effects of low kinetic energy environments and the freezing of water. Microbial life continues into the subzero temperature range, and this activity contributes to carbon and nitrogen flux in and out of ecosystems, ultimately affecting global processes. Microbial responses to climate warming and in particular, thawing of frozen soils are not yet well understood although the threat of microbial contribution to positive feedback of carbon flux is substantial. To date, several studies have examined microbial community dynamics in frozen soils and permafrost due to changing environmental conditions, and some have undertaken the complicated task of characterizing microbial functional groups and how their activity changes with changing conditions, either in situ or by isolating and characterizing macromolecules. With increasing temperature and wetter conditions microbial activity of key microbes and subsequent efflux of greenhouse gases also increase. In this review, we aim to provide an overview of microbial activity in seasonally frozen soils and permafrost. With a more detailed understanding of the microbiological activities in these vulnerable soil ecosystems, we can begin to predict and model future expectations for carbon release and climate change.Peer reviewe

    Lee, M C, NX2330

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    This record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/398866Surname: LEE. Given Name(s) or Initials: M C. Military Service Number or Last Known Location: NX2330. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 5831.216161 Item: [2016.0049.31159] "Lee, M C, NX2330

    Lee, M J, 2786386

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    This record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/398843Surname: LEE. Given Name(s) or Initials: M J. Military Service Number or Last Known Location: 2786386. Missing, Wounded and Prisoner of War Enquiry Card Index Number: SEA-2620.216114 Item: [2016.0049.31136] "Lee, M J, 2786386

    Lee, M T, 410993

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    This record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/398837Surname: LEE. Given Name(s) or Initials: M T. Military Service Number or Last Known Location: 410993. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 56934.216107 Item: [2016.0049.31130] "Lee, M T, 410993

    Lee-Carter mortality forecasting: a multi-country comparison of variants and extensions

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    We compare the short- to medium-term accuracy of five variants or extensions of the Lee-Carter method for mortality forecasting. These include the original Lee-Carter, the Lee-Miller and Booth-Maindonald-Smith variants, and the more flexible Hyndman-Ullah and De Jong-Tickle extensions. These methods are compared by applying them to sex-specific populations of 10 developed countries using data for 1986-2000 for evaluation. All variants and extensions are more accurate than the original Lee-Carter method for forecasting log death rates, by up to 61%. However, accuracy in log death rates does not necessarily translate into accuracy in life expectancy. There are no significant differences among the five methods in forecast accuracy for life expectancy.Functional data, Lee-Carter method, mortality forecasting, nonparametric smoothing, principal components, state space.

    Interview with Lee Weaver

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    Lee W. Weaver was born on May 4, 1922 in Elkhart, Indiana. He enlisted into the army on November 14, 1942. He served in England, France, Holland, Belgium, Germany, and Austria as a clerk typist

    Interview with Aaron May

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    Aaron May joined the US Army on March 4, 1942. His initial boot camp training was at Camp Chaffee, Arkansas. While serving as an enlisted man, he requested and received a commission in the Army as a Warrant Officer. He attended Officer's school at Camp Lee, Virginia. May was an infantryman with the 68th Infantry Battalion, 14th Army Division. He saw military action at Marseilles, Cannes, and in Alsace-Lorraine, France. He was present at the liberation of the Dachau Concentration Camp in Germany and the military campaign at Haguenau Forest. May was discharged from the US Army at Fort Bragg, North Carolina

    Auto-regulating New Media

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    Using Foucault's (1977, 1978) notion of panoptic method of governmentality and looking at the case of Singapore's Internet policy, this paper attempts to expand on the idea-and ideals-of 'auto-regulation'(Lee, 2000, pp. 4-5; Lee & Birch, 2000). Auto-regulation, as I shall posit in this paper, provides a way for regulatory enforcement and surveillance to become sufficiently transparent and 'normalised' so that 'the exercise of power may be supervised by society as a whole'(Foucault, 1977, pp.207-208) rather than by a select group of policy and law enforcement officers, or civil society /activist groups

    Ellis M. Sowell, Meril A. May, M. E. Sadler, and J. Lee Johnson Sr.

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    Talking over the healthy state of business in this country are, seated, left to right, Dean Ellis M. Sowell of the TCU School of Business, Meril A. May of Dun & Bradstreet and TCU President Sadler. Standing is J. Lee Johnson Senior.https://mavmatrix.uta.edu/specialcollections_startelegram1950s/12433/thumbnail.jp

    Hogan, M L (Marton Lee), NX47597

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    This record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/392765Surname: HOGAN. Given Name(s) or Initials: M L (MARTON LEE). Military Service Number or Last Known Location: NX47597. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 18970.211661 Item: [2016.0049.25058] "Hogan, M L (Marton Lee), NX47597
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