0000000000109149
AUTHOR
G. Lombardo
Characterization of bacterial community in indoor environment
We report the presence of bacterial colonization in library environment and on the books housed, performing morphological and bacterial molecular analyses. Isolated bacterial colonies were characterised by 16S rRNA locus and ITS (16S-23S rRNA Intergenic Transcribed Spacer) amplification and sequencing. The results of SEM observation and molecular analysis showed the prevalent presence of bacteria belonging to the family Micrococcaceae. We distinguished Kocuria rosea, Arthrobacter nicotianae, Micrococcus luteus and Curtobacterium flaccumfaciens which shows high cellulolytic activity.
A Low-Power Fully-Mosfet Voltage Reference Generator for 90 nm CMOS Technology
An integrated voltage reference generator, designed for being incorporated in standard 90-nm CMOS technology flash memories, is described in this paper. A fully MOSFET based approach, using also subthreshold operated devices, has been adopted in order to achieve low-voltage and low-power requirements and to overcome the difficulties of conventional band-gap reference circuits. The proposed circuit, based on current signals, internally generates two currents with opposite dependence on temperature. The two currents are added, thus canceling almost completely temperature dependence, and then linearly converted into the output voltage. For a temperature variation between -20degC and 90degC, th…
A low-power fully-MOSFET voltage reference generator for 90nm CMOS technology
Relazione tra massa e qualità del seme in Raphanus sativus L.
Neural networks for the diagnostics of gas turbine engines
The paper describes the activities carried out for developing and testing Back Propagation Neural Networks (BPNN) for the gas turbine engine diagnostics. One of the aims of this study was to analyze the problems encountered during training using large number of patterns. Each pattern contains information about the engine thermodynamic behaviour when there is a fault in progress. Moreover the research studied different architectures of BPNN for testing their capability to recognize patterns even when information is noised. The results showed that it is possible to set-up and optimize suitable and robust Neural Networks useful for gas turbine diagnostics. The methods of Gas Path Analysis furn…
MULTIPLE SCLEROSIS: PHYSICAL ACTIVITY AND WELL-BEING
Multiple sclerosis (MS) is a chronic disease that affects central nervous system (CNS) – coexists in brain, spinal cord and optic nerves. It can process in three different courses: remitting, progressive and progressive-relapsing. Although there is still no cure for MS, effective strategies are available to modify the disease course, reduce number of relapses, rate of progressions and development of new lesions. Nowadays, moderate physical performance is strongly recommended: besides having positive effects on the body, it can have a positive effect on the psychophysical wellbeing. Essentially there are 3 types of training protocols: aerobic (endurance training), strength training (resistan…
A fully MOSFET-based voltage reference for low-power low-voltage integrated circuits
Large-Eddy Simulation of Flow and Heat Transfer in Compact Heat Exchangers
LES results are presented for different heat exchanger geometries. Subgrid terms were usually computed by the Smagorinsky model; preliminary comparative results are also given for the ‘dynamic’ subgrid model. The numerical methods used were those implemented in a commercial general-purpose code (CFDS-FLOW3D); they included a finite-volume approach, colocated body-fitted grids, central differencing for the advection terms, the SIMPLEC algorithm, and Crank-Nicolson time stepping. Predictions arc compared with experimental measurements (including local Nu distributions), and with results from a low-Reynolds number k-e model. In most cases, LES was more ‘robust’ and required little more CPU tim…
PLANT EXTRACTS AS GREEN POTENTIAL STRATEGIES TO CONTROL THE BIODETERIORATION OF CULTURAL HERITAGE
The biodeterioration of historic-artistic manufacts is related to several biological systems, including fungi and bacteria, whose metabolic activities and vegetative development have a direct consequence on the conservation of cultural assets. Generally, different chemical compounds are utilized as biocides in order to control biodeteriogens growth, but recently the attention has been focused on potential risks of their use towards human health (operators, visitors) and the environment. In order to develop alternative methods, various natural products have been tested, particularly to control the colonization by fungi and bacteria. In this study, antimicrobial activity of three different pl…