نتایج جستجو برای: AOA

تعداد نتایج: 1533  

Journal: :The Journal of Bone and Joint Surgery-American Volume 2008

2007
Chunhua Yang Yi Huang Xu Zhu

We propose a hybrid time difference of arrival (TDOA) / angle of arrival (AOA) method for indoor positioning systems. The combined AOA includes both the azimuth AOA (A-AOA) and elevation AOA (E-AOA). Thus, this method makes full use of the AOA information to minimize the errors due to estimation of multipath parameters and gives the position of the estimated mobile terminals by simultaneously r...

Journal: :Applied and environmental microbiology 2009
Nicole S Moin Katelyn A Nelson Alexander Bush Anne E Bernhard

Diversity and abundance of ammonia-oxidizing Betaproteobacteria (beta-AOB) and archaea (AOA) were investigated in a New England salt marsh at sites dominated by short or tall Spartina alterniflora (SAS and SAT sites, respectively) or Spartina patens (SP site). AOA amoA gene richness was higher than beta-AOB amoA richness at SAT and SP, but AOA and beta-AOB richness were similar at SAS. beta-AOB...

Journal: :Applied and environmental microbiology 2012
Elizabeth French Jessica A Kozlowski Maitreyee Mukherjee George Bullerjahn Annette Bollmann

Aerobic biological ammonia oxidation is carried out by two groups of microorganisms, ammonia-oxidizing bacteria (AOB) and the recently discovered ammonia-oxidizing archaea (AOA). Here we present a study using cultivation-based methods to investigate the differences in growth of three AOA cultures and one AOB culture enriched from freshwater environments. The strain in the enriched AOA culture b...

Journal: :Circulation 1994
W Chen F J Schoen R J Levy

BACKGROUND Calcification is a frequent cause of the clinical failures of glutaraldehyde-pretreated bioprosthetic heart valves (BPHV) fabricated from glutaraldehyde-cross-linked porcine aortic valves. 2-Amino oleic acid (AOA) has been shown in previous in vivo studies to be a promising anticalcification agent. Our objective was to investigate the mechanism of calcification inhibition mediated by...

Journal: :Journal of biomedical materials research 1994
W Chen J D Kim F J Schoen R J Levy

Postimplant calcific degeneration is a frequent cause of clinical failures of glutaraldehyde cross-linked porcine bioprosthetic heart valves (BPHV). It was demonstrated previously that 2-amino oleic acid (AOA) used as a bioprosthesis treatment was highly effective in mitigating aortic valve cusp but not aortic wall calcification. Our main objective was to study the efficacy of various AOA expos...

Journal: :Chest 2011
Aaron B Holley Christopher J Lettieri Anita A Shah

BACKGROUND We sought to establish the efficacy of an adjustable oral appliance (aOA) in the largest patient population studied to date, to our knowledge, and to provide a comparison with continuous positive airway pressure (CPAP). METHODS We conducted a retrospective analysis of patients using an aOA. Results of overnight polysomnography with aOA titration were evaluated and compared with CPA...

2015
Leiliu Zhou Shanyun Wang Yuxuan Zou Chao Xia Guibing Zhu

Ammonia oxidation is the first step in nitrification and was thought to be performed solely by specialized bacteria. The discovery of ammonia-oxidizing archaea (AOA) changed this view. We examined the large scale and spatio-temporal occurrence, abundance and role of AOA throughout Chinese inland waters (n = 28). Molecular survey showed that AOA was ubiquitous in inland waters. The existence of ...

2013
Xuefeng Peng Amal Jayakumar Bess B. Ward

Ammonia-oxidizing archaea (AOA) have been reported at high abundance in much of the global ocean, even in environments, such as pelagic oxygen minimum zones (OMZs), where conditions seem unlikely to support aerobic ammonium oxidation. Due to the lack of information on any potential alternative metabolism of AOA, the AOA community composition might be expected to differ between oxic and anoxic e...

Journal: :Journal of experimental psychology. Learning, memory, and cognition 2013
Maximiliano A Wilson Fernando Cuetos Rob Davies Cristina Burani

Word age-of-acquisition (AoA) affects reading. The mapping hypothesis predicts AoA effects when input-output mappings are arbitrary. In Spanish, the orthography-to-phonology mappings required for word naming are consistent; therefore, no AoA effects are expected. Nevertheless, AoA effects have been found, motivating the present investigation of how AoA can affect reading in Spanish. Four experi...

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