Search results for " architect"

Direct determination of lead in cola beverages by electrothermal atomic absorption spectrophotometry

1992

Examination of robust D-stability of TCP-DCR protocol

2012

This paper presents non-linear mathematical model of a computer network with a part of wireless network. The article contains an analysis of the stability of the network based on TCP-DCR, which is a modification of the traditional TCP. Block diagram of the network model was converted to a form in order to investigate the D-stability using the method of the space of uncertain parameters. Robust D-stability is calculated for constant delays values.

TCP Performance in Mobile Ad hoc Networks

2013

International audience; In this paper, we present a survey of TCP (Transmission Control Protocol) protocol for better performance in the MANET (Mobile Ad Hoc Network). After a short presentation of the main features of TCP, we give the most important problems from which TCP suffer in MANET. We present after that some approaches proposed in the literature in order to improve its performance. Our paper contains also a performance evaluation of TCP NewReno and TCP Vegas transport protocols under AODV and DSR routing protocols. The simulations are conducted under varying conditions of number of TCP connections, number of nodes and mobility.

CORPORATE VENTURE CAPITAL SYNDICATION STRATEGIES: A DYNAMIC NETWORK PERSPECTIVE

2018

Corporate Venture Capital (CVC) syndication is embraced by over 80% of corporates which co-investing the same startups with other corporates create a CVC syndication network. In this paper, we aim at exploring the evolutionary dynamics of the CVC syndication network. Specifically, we address this topic adopting two different perspectives. First, we investigate the architectural evolution of the CVC syndication network examining five dimensions that characterize the evolution of the network structure (i.e. degree distribution, connectivity, clustering, density and degree assortativity). In addition, we study how three network strategies (i.e. prominence, entrepreneurial and relational) evolv…

Evidence for characteristic vascular patterns in solid tumours: quantitative studies using corrosion casts

1999

The vascular architecture of four different tumour cell lines (CaX, CaNT, SaS, HEC-1B) transplanted subcutaneously in mice was examined by means of microvascular corrosion casting in order to determine whether there is a characteristic vascular pattern for different tumour types and whether it differs significantly from two normal tissues, muscle and gut. Three-dimensional reconstructed scanning electron microscope images were used for quantitative measurements. Vessel diameters, intervessel and interbranch distances showed large differences between tumour types, whereas the branching angles were similar. In all tumours, the variability of the vessel diameters was significantly higher than …

Productive and vegetative behaviour of olive cultivars in super high-density olive grove

2015

In recent years, there has been an increase in interest in super high-density (SHD) olive (Olea europaea L.) groves because they offer early entry into production, increased productivity and the possibility of using modified mechanical vine harvesters. This study was carried out in a young SHD olive grove to examine vegetative, histo-anatomical and productive characteristics and oil quality of the Spanish Arbequina and Italian Maurino and Leccino cultivars, characterized by low, low-to-medium and high vigor, respectively. Arbequina had low vigor and limited development in height and width, as well as a high leaf/wood ratio. Maurino had a canopy volume similar to that of Arbequina and, despi…

A Triassic carbonate platform edge in the Sciacca zone: implications for the accretion of the Maghrebian chain in southwestern Sicily

2008

Genome-wide association analysis in dilated cardiomyopathy reveals two new players in systolic heart failure on chromosomes 3p25.1 and 22q11.23

2021

Abstract Aims  Our objective was to better understand the genetic bases of dilated cardiomyopathy (DCM), a leading cause of systolic heart failure. Methods and results  We conducted the largest genome-wide association study performed so far in DCM, with 2719 cases and 4440 controls in the discovery population. We identified and replicated two new DCM-associated loci on chromosome 3p25.1 [lead single-nucleotide polymorphism (SNP) rs62232870, P = 8.7 × 10−11 and 7.7 × 10−4 in the discovery and replication steps, respectively] and chromosome 22q11.23 (lead SNP rs7284877, P = 3.3 × 10−8 and 1.4 × 10−3 in the discovery and replication steps, respectively), while confirming two previously identif…

Carlo Scarpa. Una [curiosa] lama di luce, un gonfalone d’oro, le mani e un viso di donna : riflessioni sul processo progettuale per l’allestimento di…

2020

Seconda edizione aggiornata e ampliata febbraio 2020. L’organizzazione spaziale di tutta la Galleria Regionale di Palazzo Abatellis è un luogo di mediazioni complesse fra l’impegno progettuale scarpiano, il senso di misura e di armonia complessiva e le istanze del curatore Giorgio Vigni. Il volume, nella sua struttura, cerca di far comprendere il collegamento fra il luogo e il processo progettuale del “fare scarpiano”, scartando la cronologia dell’intervento stesso con riflessioni che riguardano la strategia dei percorsi, e forse svelano un possibile messaggio in codice. Si tratta di una ricognizione mirata, la cui narrazione è ricomposta anche grazie ad alcuni indizi (rinvenuti durante lo …

On the spectral moments of non-WSSUS mobile-to mobile double-Rayleigh fading channels

2017

This paper deals with the mathematical analysis of the spectral moments of non-wide-sensestationary uncorrelated-scattering (non-WSSUS) mobile-to-mobile (M2M) double-Rayleigh fading channels. The point of departure is a recently proposed geometry-based statistical model (GBSM) for M2M double-Rayleigh fading channels from which general analytical expressions are derived for the average Doppler shift, Doppler spread, average delay, and delay spread. Closed-form solutions of such expressions are presented for the particular case of the geometrical two-rings scattering model. The obtained results indicate that the average Doppler shift and Doppler spread are directly influenced by not only the …