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Hensley, Sarah A.,Jung, Jong-Hyun,Park, Cheon-Seok,Holden, James F. International Union of Microbiological Societies 2014 International journal of systematic and evolutiona Vol.64 No.11
<P>Two heterotrophic hyperthermophilic strains, ES1<SUP>T</SUP> and CL1<SUP>T</SUP>, were isolated from <I>Paralvinella</I> sp. polychaete worms collected from active hydrothermal vent chimneys in the north-eastern Pacific Ocean. Both were obligately anaerobic and produced H<SUB>2</SUB>S in the presence of elemental sulfur and H<SUB>2</SUB>. Complete genome sequences are available for both strains. Phylogenetic analyses based on 16S rRNA gene sequences showed that the strains are more than 97 % similar to most other species of the genus <I>Thermococcus</I>. Therefore, overall genome relatedness index analyses were performed to establish that these strains are novel species. For each analysis, strain ES1<SUP>T</SUP> was determined to be most similar to <I>Thermococcus barophilus</I> MP<SUP>T</SUP>, while strain CL1<SUP>T</SUP> was determined to be most similar to <I>Thermococcus sp.</I> 4557. The average nucleotide identity scores for these strains were 84 % for strain ES1<SUP>T</SUP> and 81 % for strain CL1<SUP>T</SUP>, genome-to-genome direct comparison scores were 23 % for strain ES1<SUP>T</SUP> and 47 % for strain CL1<SUP>T</SUP>, and the species identification scores were 89 % for strain ES1<SUP>T</SUP> and 88 % for strain CL1<SUP>T</SUP>. For each analysis, strains ES1<SUP>T</SUP> and CL1<SUP>T</SUP> were below the species delineation cut-off. Therefore, based on their whole genome sequences, strains ES1<SUP>T</SUP> and CL1<SUP>T</SUP> are suggested to represent novel species of the genus <I>Thermococcus</I> for which the names <I>Thermococcus</I> <I>paralvinellae</I> sp. nov. and <I>Thermococcus cleftensis</I> sp. nov. are proposed, respectively. The type strains are ES1<SUP>T</SUP> ( = DSM 27261<SUP>T</SUP> = KACC 17923<SUP>T</SUP>) and CL1<SUP>T</SUP> ( = DSM 27260<SUP>T</SUP> = KACC 17922<SUP>T</SUP>).</P>
Duk-jin Kim,Hensley, Scott,Sang-Ho Yun,Neumann, Maxim IEEE 2016 IEEE geoscience and remote sensing letters Vol.13 No.2
<P>Change detection using synthetic aperture radar (SAR) data is useful in emergency situations and unfavorable weather conditions. In this letter, change detection using multitemporal polarimetric Uninhabited Aerial Vehicle SAR data is investigated in an urban environment. The most robust polarimetric parameters are determined, and change detection techniques using a maximum likelihood ratio and a hyperbolic tangent model function are applied to the selected parameter. The model function was introduced to quantify the change characteristics and to rule out seasonal changes or those related to mobile features, and thus to only detect durable and permanent changes in urban environments. A comparison of results with historical Google Earth images showed a good level of agreement. Fitting of the hyperbolic tangent function to the multitemporal polarimetric parameters significantly reduces the false detection rate and indicates whether a building was constructed or destroyed, as well as when the detected changes occurred.</P>
Complete genome sequence of hyperthermophilic archaeon Thermococcus sp. ES1
Jung, J.H.,Kim, Y.T.,Jeon, E.J.,Seo, D.H.,Hensley, S.A.,Holden, J.F.,Lee, J.H.,Park, C.S. Elsevier Science Publishers 2014 Journal of biotechnology Vol.174 No.-
Thermococcus sp. strain ES1 is an anaerobic, hyperthermophilic archaeon from a hydrothermal vent that catabolizes sugars and peptides and produces H<SUB>2</SUB>S from S<SUP>o</SUP>, H<SUB>2</SUB>, acetate and CO<SUB>2</SUB> as its primary metabolites. We present the complete genome sequence of this strain (1,957,742bp) with a focus on its substrate utilization and metabolite production capabilities. The sequence will contribute to the development of heterotrophic archaea for bioenergy production and biogeochemical modeling in hydrothermal environments.
The State-of-Play of Anomalous Microwave Emission (AME) research
Dickinson, Clive,Ali-Haï,moud, Y.,Barr, A.,Battistelli, E.S.,Bell, A.,Bernstein, L.,Casassus, S.,Cleary, K.,Draine, B.T.,Gé,nova-Santos, R.,Harper, S.E.,Hensley, B.,Hill-Valler, J.,Hoang, Th Elsevier 2018 New astronomy reviews Vol.80 No.-
<P><B>Abstract</B></P> <P>Anomalous Microwave Emission (AME) is a component of diffuse Galactic radiation observed at frequencies in the range ≈ 10–60 GHz. AME was first detected in 1996 and recognised as an additional component of emission in 1997. Since then, AME has been observed by a range of experiments and in a variety of environments. AME is spatially correlated with far-IR thermal dust emission but cannot be explained by synchrotron or free–free emission mechanisms, and is far in excess of the emission contributed by thermal dust emission with the power-law opacity consistent with the observed emission at sub-mm wavelengths. Polarization observations have shown that AME is very weakly polarized ( ≲ 1 %). The most natural explanation for AME is rotational emission from ultra-small dust grains (“spinning dust”), first postulated in 1957. Magnetic dipole radiation from thermal fluctuations in the magnetization of magnetic grain materials may also be contributing to the AME, particularly at higher frequencies ( ≳ 50 GHz). AME is also an important foreground for Cosmic Microwave Background analyses. This paper presents a review and the current state-of-play in AME research, which was discussed in an AME workshop held at ESTEC, The Netherlands, June 2016.</P>