490 research outputs found
Automatic Procedure for Thermal NDE of Delaminations in CFRP by Using Neural Networks
This work is a first step in detecting and characterizing defects in an automatic way by using artificial intelligence. Transient thermal NDE by IR thermography is the method used for such a purpose. Data are processed by Neural Networks
The Sludge Dewaterability in Advanced Wastewater Treatment: A Survey of Four Different Membrane BioReactor Pilot Plants
The wasted activated sludge dewaterability represents a major concern
for Wastewater Treatment Plants (WWTPs) managers. Indeed, whereas the
dewatered sludge could represents a re-usable matrix, the principal drawback
related to the wasted sludge dewaterability is the high water content due to the
presence of extracellular polymeric substances (EPS) that allow the trapping of
water molecules within the bio sludge flocs. In order to provide an outlook of
the dewaterability features of activated sludge derived from advanced WWTP,
the present research reports a long term survey (over two years) aimed at
assessing the principal dewaterability parameters of the sludge wasted from
different Membrane BioReactor pilot plants
E-readers and the death of the book: or, new media and the myth of the disappearing medium
The recent emergence of e-readers and e-books has b
rought the death of the book to the centre of
current debates on new media. In this article, we a
nalyse alternative narratives that surround the
possibility of the disappearance of print books, do
minated by fetishism, fears about the end of
humanism, and ideas of techno-fundamentalist progre
ss. We argue that, in order to comprehend
such narratives, we need to inscribe them in the br
oader history of media. The emergence of new
media, in fact, has often been accompanied by narra
tives about the possible disappearance of
older media: the introduction of television, for in
stance, inspired claims about the forthcoming
death of film and radio. As a recurrent narrative s
haping the reception of media innovation, the
myth of the disappearing medium helps us to make se
nse of the transformations that media
change provokes in our everyday life
Spin Glass and Antiferromagnetic Behaviour in a Diluted fcc Antiferromagnet
We report on a Monte Carlo study of a diluted Ising antiferromagnet on a fcc
lattice. This is a typical model example of a highly frustrated
antiferromagnet, and we ask, whether sufficient random dilution of spins does
produce a spin glass phase. Our data strongly indicate the existence of a spin
glass transition for spin--concentration : We find a divergent spin
glass susceptibility and a divergent spin glass correlation length, whereas the
antiferromagnetic correlation length saturates in this regime. Furthermore, we
find a first order phase transition to an antiferromagnet for ,
which becomes continuous in the range . Finite size scaling is
employed to obtain critical exponents. We compare our results with experimental
systems as diluted frustrated antiferromagnets as .Comment: 29 pages (revtex) and 10 figures uuencoded and Z-compresse
Synovial fluid lipids in normal individuals and patients with rheumatoid arthritis
Normal human synovial fluid contains trace amounts of phospholipids and cholesterol. Phospholipid composition is similar to that in serum. Rheumatoid synovial fluid contains increased amounts of phospholipid, cholesterol, and neutral lipids. In most cases the concentration is 40 to 60 per cent of that found in simultaneously collected serum specimens. A direct relationship appears to exist between total synovial fluid protein and lipid concentration. No relationship could be established between lipid content in rheumatoid synovial fluid, and total cell content, hyaluronic acid, severity or duration of synovitis in the involved joint.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/37694/1/1780050606_ftp.pd
Mutation of a single residue, β-glutamate-20, alters protein–lipid interactions of light harvesting complex II
It is well established that assembly of the peripheral antenna complex, LH2, is required for proper photosynthetic membrane biogenesis in the purple bacterium Rhodobacter sphaeroides. The underlying interactions are, as yet, not understood. Here we examined the relationship between the morphology of the photosynthetic membrane and the lipid–protein interactions at the LH2–lipid interface. The non-bilayer lipid, phosphatidylethanolamine, is shown to be highly enriched in the boundary lipid phase of LH2. Sequence alignments indicate a putative lipid binding site, which includes β-glutamate-20 and the adjacent carotenoid end group. Replacement of β-glutamate-20 with alanine results in significant reduction of phosphatidylethanolamine and concomitant raise in phosphatidylcholine in the boundary lipid phase of LH2 without altering the lipid composition of the bulk phase. The morphology of the LH2 housing membrane is, however, unaffected by the amino acid replacement. In contrast, simultaneous modification of glutamate-20 and exchange of the carotenoid sphaeroidenone with neurosporene results in significant enlargement of the vesicular membrane invaginations. These findings suggest that the LH2 complex, specifically β-glutamate-20 and the carotenoids' polar head group, contribute to the shaping of the photosynthetic membrane by specific interactions with surrounding lipid molecules
Comprehensive review of the detection methods for synthetic cannabinoids and cathinones
Due lamine bronzee iscritte dall’area della necropoli tra via Tiepolo e via San Massimo a Padova
Si presenta lo studio di due lamine bronzee con iscrizione venetica rinvenute nel 1990 a Padova, nell’ambito della necropoli orientale della città, ma non associate ad un contesto tombale. Sulla base della morfologia e dei confronti nei contesti veneti ed etruschi si propone una interpretazione di queste lamine come rivestimento di un bastone ricurvo (lagobolon o pedum); l’iscrizione, pure nella sua difficile lettura ed interpretazione, offre un supporto a questa ipotesi interpretativa, che viene messa in relazione con possibili cerimonie ed attività di ristrutturazione dei distretti urbani a Padova tra il V e gli inizi del IV secolo a.C
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