Search results for "fusion"

Effects of Pressure, Temperature, and Particles Size on O2 Diffusion Dynamics in Silica Nanoparticles

2013

The O2 diffusion process in silica nanoparticles is experimentally studied in samples of average radius of primary particles ranging from 3.5 to 20 nm and specific surface ranging from 50 to 380 (m2/g). The investigation is done in the temperature range from 98 to 177 °C at O2 pressure ranging from 0.2 to 66 bar by measuring the interstitial O2 concentration by Raman and photoluminescence techniques. The kinetics of diffusion can be described by the Fick’s equation with an effective diffusion coefficient depending on the temperature, O2 pressure, and particles size. In particular, the dependence of the diffusion coefficient on the pressure and nanoparticles size is more pronounced at lower …

Utility of 3 Tesla diffusion-weighted magnetic resonance (DWMR) imaging for the characterisation of small solid renal tumours

2012

Purpose: To determine the utility of apparent diffusion coefficients (ADCs) for the characterisation of small solid renal lesions. Methods and Materials: 26 patients (GFR 30-60 mL/min) with 39 small (1-3 cm) solid renal masses [16 RCCs (10 clear cell types; 6 other types); 18 AMLs (10 fat-containing; 8 minimal-fat) and 5 oncocytomas] were examined on a 3 T system using DW-SS-EPI (b-values 0, 1000 s/mm2). The ADC of the lesions and the ADC of kidney were evaluated. Receiver operator characteristic analysis was performed to evaluate the diagnostic value of ADC for differentiating clear cell RCCs from other type RCCs, AMLs and oncocytomas. Results: The mean ADC of the lesions [1.22± 0.27 28 mm…

Diffusione del virus della “Tristeza” degli agrumi (CTV) in aree agrumicole italiane

2006

Computational modeling of protein diffusion in the cell nucleus using the lattice-Boltzmann method

2012

The number of fluorescence applications and methods of analysis is growing in the biological and related sciences. The aim of this work was to accurately determine the diffusion coefficient in nucleus, diffusion in the cytoplasm and nucleo-cytoplasmic translocation should be considered as well. Fluorescence recovery after photobleaching (FRAP) experiments were used in order to study protein diffusion. A numerical model for FRAP was used to determine the diffusion properties of proteins. The present method removed the difficulties of the conventional analysis, could produce, interesting results for protein diffusion in the cell.

Dimensionality reduction framework for detecting anomalies from network logs

2012

Dynamic web services are vulnerable to multitude of intrusions that could be previously unknown. Server logs contain vast amounts of information about network traffic, and finding attacks from these logs improves the security of the services. In this research features are extracted from HTTP query parameters using 2-grams. We propose a framework that uses dimensionality reduction and clustering to identify anomalous behavior. The framework detects intrusions from log data gathered from a real network service. This approach is adaptive, works on the application layer and reduces the number of log lines that needs to be inspected. Furthermore, the traffic can be visualized. peerReviewed

Using affinity perturbations to detect web traffic anomalies

2013

The initial training phase of machine learning algorithms is usually computationally expensive as it involves the processing of huge matrices. Evolving datasets are challenging from this point of view because changing behavior requires updating the training. We propose a method for updating the training profile efficiently and a sliding window algorithm for online processing of the data in smaller fractions. This assumes the data is modeled by a kernel method that includes spectral decomposition. We demonstrate the algorithm with a web server request log where an actual intrusion attack is known to happen. Updating the kernel dynamically using a sliding window technique, prevents the proble…

The global spread of the concept of cultural policy

2020

The article studies UNESCO's program that, from the late 1960s onward, aimed at spreading globally the concept of cultural policy. An essential part of the program, UNESCO invited member states from different regions of the world to prepare reports on national cultural policy. That was successful in spreading cultural policy as a concept and as a governmental structure. Except for only Australia, Canada and the United States, in which cultural policy is handled at a sub-state level, all countries that produced a national report have established a ministry of culture, typically synchronously with the report. The analysis suggests that UNESCO's success was due to two factors: the process of d…

The role of the European Society of Human Genetics in delivering genomic education

2021

The European Society of Human Genetics (ESHG) was founded in 1967 as a professional organisation for members working in genetics in clinical practice, research and education. The Society seeks the integration of scientific research and its implementation into clinical practice and the education of specialists and the public in all areas of medical and human genetics. The Society works to do this through many approaches, including educational sessions at the annual conference; training courses in general and specialist areas of genetics; an online resource of educational materials (EuroGEMS); and a mentorship scheme. The ESHG Education Committee is implementing new approaches to expand the r…

Calcium efflux from human erythrocyte ghosts

1970

The passive Ca efflux from human red cell ghosts was studied in media of differing ion compositions and compared to the ATP-dependent Ca efflux. Cells were loaded with(45)Ca during reversible hemolysis, and the loss of radioactivity into the non-radioactive incubation medium was measured, usually for 3 hr at 37°C. Analysis of the efflux curves revealed that(45)Ca efflux followed the kinetics of a simple two-compartment system. In the concentration range between 0 and 1MM Ca in the external solution ([Ca(++)] o ), the rate constant of passive Ca efflux (k min(-1), fraction of(45)Ca lost per minute into the medium) increased from 0.00732 to 0.0150 min(-1). There was no further increase at hig…

A study of physical processes in microplasma capillary discharges

2011

We continue the research of low-pressure capillary discharge lamps of 500  μ m in radius in Ar/Hg, Kr/Hg and Xe/Hg mixtures. In the previous paper, an experimental approach which combines the optical emission spectroscopy (OES) and tomographic methods was developed to study the capillary discharge. The present work is focused on interpretation of the tomographic reconstruction results for understanding the physical processes occurring in a capillary plasma. Analyzing the results of reconstruction, it was concluded that the radial profiles of Ar, Kr and Xe emission coefficients are in a good agreement with the Schottky theory. According to the Schottky model, ionization processes in plasma a…