Noble Gas Clusters and Nanoplasmas in High Harmonic Generation

We report a study of high harmonic generation from noble gas clusters of xenon atoms in a gas jet. Harmonic spectra were investigated as a function of backing pressure, showing spectral shifts due to the nanoplasma electrons in the clusters. At certain value of laser intensity this process may oppose the effect of the well-known ionization-induced blueshift. In addition, these cluster-induced harmonic redshifts may give the possibility to estimate cluster density and cluster size in the laser-gas jet interaction range.Comment: 5 pages, 4 figure

Pemodelan Kecelakaan Sepeda Motor Di Kota Surabaya Dengan Metode Glm (Generalized Linear Model)

The growth of motorcycles in the recent years is rapidly increasing, about16.54% per year. Due to this growth, the amount of accident on the roads hasincreased in number, where one of the areas that has increasing number ofaccident is Surabaya. This research aims to set up the prediction models ofmotorcycle accidents (MCA) and motorcycle victims (KSI).The method used is field research with the primary data based on thetraffic and the road geometric survey, while the data of accidents in the year 2006to April 2009 is as the secondary data which is obtained from the PoliceDepartment. The method used to analyze the data is Generalized Linear Models(GLM) with Poisson distribution and logarithm link function.From the model of motorcycle accident (MCA), it could be predicted thatthe increasing of either traffic or motorcycle proportion 10%, would increase thenumber of motorcycle accidents 37.86% and 42.78% per year. The increase of theroad width 1.0 meter is predicted to make the motorcycle accident decrease12.59% per year, while the road with the lines < 3 is predicted could decrease thenumber of motorcycle accident 44.46% per year. The model of motorcyclevictims who died or seriously injured (KSI) shows that the increase of traffic 10%would increase the motorcycle accident for the victims who died or seriouslyinjured 34.72% per year, while the limit of motorcycle proportion to < 70% andthe increase of road width 1.0 meter is predicted able to decrease the victims whodied or seriously injured 46.69% and 20.24% per year

Perbandingan Metode Bina Marga Dan Metode Pci (Pavement Condition Index) Dalam Penilaian Kondisi Perkerasan Jalan (Studi Kasus Ruas Jalan Kaliurang, Kota Malang)

The assessment of pavement condition is needed to establish the appropriatemaintenance program. The methods that usually used to evaluate pavement condition arethe method of Bina Marga and PCI (Pavement Condition Index) method. This study aimsto assess the pavement condition of Kaliurang street with these two methods beingcompared.This study used field research in which the primary data was the result ofpavement condition survey. The priority of pavement maintenance of Bina Marga methodrated from 0 to more than 7, while the PCI rated from 0 to 100.The evaluation results of either Bina Marga or PCI method indicate that thepavement of Kaliurang street still has fair performance but needs some maintenance andrehabilitation

MRI/TRUS data fusion for brachytherapy

BACKGROUND: Prostate brachytherapy consists in placing radioactive seeds for tumour destruction under transrectal ultrasound imaging (TRUS) control. It requires prostate delineation from the images for dose planning. Because ultrasound imaging is patient- and operator-dependent, we have proposed to fuse MRI data to TRUS data to make image processing more reliable. The technical accuracy of this approach has already been evaluated. METHODS: We present work in progress concerning the evaluation of the approach from the dosimetry viewpoint. The objective is to determine what impact this system may have on the treatment of the patient. Dose planning is performed from initial TRUS prostate contours and evaluated on contours modified by data fusion. RESULTS: For the eight patients included, we demonstrate that TRUS prostate volume is most often underestimated and that dose is overestimated in a correlated way. However, dose constraints are still verified for those eight patients. CONCLUSIONS: This confirms our initial hypothesis

A distributed cyber-security framework for heterogeneous environments

Evolving business models, computing paradigms, and management practices are rapidly re-shaping the usage models of ICT infrastructures, and demanding for more flexibility and dynamicity in enterprise security, beyond the traditional "security perimeter" approach. Since valuable ICT assets cannot be easily enclosed within a trusted physical sandbox any more, there is an increasing need for a new generation of pervasive and capillary cyber-security paradigms over distributed and geographically-scattered systems. Following the generalized trend towards virtualization, automation, software-definition, and hardware/software disaggregation, in this paper we elaborate on a multi-tier architecture made of a common, programmable, and pervasive data-plane and a powerful set of multi-vendor detection and analysis algorithms. Our approach leverages the growing level of programmability of ICT infrastructures to create a common and unified framework that could be used to monitor and protect distributed heterogeneous environments, including legacy enterprise networks, IoT installations, and virtual resources deployed in the cloud

Competing feedback in an idealized tide-influenced delta network

The morphodynamic evolution of river deltas is intimately tied to flow and sediment partitioning at bifurcations. In this work, the long-term equilibrium configuration of a simple delta network is investigated by means of an analytical model, which accounts for the effect of small tidal oscillations. Differently from individual bifurcations where tidal action is always a stabilizing factor, in the case of a tree-like delta with multiple bifurcations a dual response emerges. Specifically, depending on the values of four reference parameters functions of tidal amplitude, upstream flow conditions, and channels geometry, tides can either promote or discourage an unbalanced discharge distribution. This behavior primarily concerns the apex bifurcation, which is affected by the variations of the relative tidal amplitude at the internal nodes. In turn these variations depend on how flow and sediment are diverted upstream. The stability of steady-state solutions is found to be governed by the sign and magnitude of the slope asymmetry between channels. This work provides a basic modeling framework for the interpretation of the autogenic response of multiple coupled micro-tidal bifurcations, which can potentially be extended to include in a unified scheme erosional and depositional processes typical of fluvio-deltaic systems