196,237 research outputs found
Uso dello spazio aereo ed assistenza al volo nella Convenzione di Chicago e negli Annessi e Procedure ICAO
No full textDefensorium montis pietatis contra figmenta omnia aemulae falsitatis
No full text[editum p[er] ... Bernardinu[m] de Busti Ordinis Minor[um] de obseruantia]Veröffentlichungsangabe im Kolophon in Vorlageform: Ex officina in=||dustrij Henrici Gran ciuis Hagenawen[sis].Jmpensis circumspecti honestiq[ue] || archibibliopole Joannis Rynman de Oringaw Finemq[ue] nactum feliciter || Anno v[ir]ginei p[ar]t[us].1513. Jn vigilia Natiuitat[is] gl[or]iose v[ir]ginis Marie theotoceo
Globally Convergent Autocalibration
No full textExisting autocalibration techniques use numerical optimization algorithms that are prone to the problem of local minima. To address this problem, we have developed a method where an interval branch-and-bound method is employed for numerical minimization. Thanks to the properties of Interval Analysis this method is guaranteed to converge to the global solution with mathematical certainty and arbitrary accuracy, and the only input information it requires from the user is a set of point correspondences and a search box. The cost function is based on the Huang-Faugeras constraint of the fundamental matrix. A recently proposed interval extension based on Bernstein polynomial forms has been investigated to speed up the search for the solution. Finally, some experimental results on synthetic images are presented
Increased Myeloperoxidase Index and Large Unstained Cell Values can Predict the Neutropenia Phase of Cancer Patients Treated With Standard Dose Chemotherapy
No full textOBJECTIVE:
The objective of this study was to better understand neutropenia induced by standard dose chemotherapy and to verify if there are any hematological parameters for defining the phase and possibly the duration of neutropenia.
METHODS:
The kinetics of large unstained cells (LUCs) and lymphocytes was evaluated in 324 blood counts of 56 chemotherapy cycles through the use of a Technicon H2 or an ADVIA 120 hematology analyzer. Blood samples collected during the neutropenia phase were also studied by flow cytometry using a large panel of monoclonal antibodies. Parametric and nonparametric statistics were employed to compare the different variables analyzed. A linear regression between each variable before and after nadir and a simple linear correlation among the same variables in the neutropenic and recovery phase were performed.
RESULTS:
The percentage of LUCs reaches the higher value at nadir and the difference between the mean value of prenadir and nadir is statistically significant (P <.01). The number of LUCs increases during the pre and postnadir phase. Lymphocytes number appears stable in the prenadir phase. The MPXI index increases in the prenadir phase and falls at nadir and this difference is statistically significant(P <.01). LUCs are correlated with blasts and CD34+ cells in the pre and postnadir phase, with CD3+/CD4+ cells in the prenadir phase, and with CD2+/CD56+ in the postnadir phase.
CONCLUSIONS:
Our data have shown that the estimation of both percentage of LUCs and MPXI can predict the neutropenia phase and orient for its duration. The lymphocyte number may be regarded as a parameter of risk of fever after day 5 of chemotherapy and the number of blood CD34+ cells may be predicted by LUC count
Rigorous accuracy bounds for calibrated stereo reconstruction
No full textWe deal with the problem of obtaining rigorous bounds to the position of 3-D points computed by stereo triangulation when both the camera matrix and the image points are affected by uncertainty. By "rigorous bounds" we mean that the true unknown 3-D points are guaranteed to lie within the given intervals. To this end we first model the calibration process by assuming a bounded error in the localization of the reference points in the image, then we narrow the entries of the camera matrix. Finally, we apply triangulation and obtain cuboids that bound points coordinates. We concentrated two state-of-the art methods for the solution of linear system of equations, namely INTLAB's and Shary's methods. Empirical comparison shows that the latter always provides sharper error bounds, in this application
Pluripotent Stem Cells for Brain Repair: Protocols and Preclinical Applications in Cortical and Hippocampal Pathologies
No full textA coarse-grain model for cellular growth accounting for ribosome synthesis
No full textProtein synthesis in eukaryotes is carried out by ribosomes, large RNA-protein complexes consisting of a small and a large subunit. In this work we present a mathematical model for cellular growth comprising both protein production and ribosome synthesis, properly accounting for both small and large subunits dynamics. The qualitative analysis of the model is carried out according to a simplifying assumption on the proportion of the two ribosomal subunits in stationary growth conditions; such hypothesis is based on a reasonable biological ground. Conditions are given on the model parameters in order to ensure exponential growth and the corresponding growth rate is straightforwardly computed from the model parameters. These results are validated by numerical simulations carried out according to a set of biologically meaningful model parameters. The modified model is better suited to host molecular blow-up of ribosomal synthesis and cell growth within a modular whole-cell model able to act as a scaffold connecting metabolism, growth and cycle
2. F. Nyamakwere, M. Busti, E. Raffrenato, P.A. Gouws, K. Dzama, Esposito G.. 2020. Evaluation of the effects of Gamma (γ) irradiation treatment on the compositional, textural, colour, volatile profile, and microbiological quality of an artisanal hard-pressed cheese. American Dairy Science Association Virtual Meeting.
No full textGlobally convergent autocalibration using interval analysis
No full textWe address the problem of autocalibration of a moving camera with unknown constant intrinsic parameters. Existing autocalibration techniques use numerical optimization algorithms whose convergence to the correct result cannot be guaranteed, in general. To address this problem, we have developed a method where an interval branch-and-bound method is employed for numerical minimization. Thanks to the properties of Interval Analysis this method converges to the global solution with mathematical certainty and arbitrary accuracy and the only input information it requires from the user are a set of point correspondences and a search interval. The cost function is based on the Huang-Faugeras constraint of the essential matrix. A recently proposed interval extension based on Bernstein polynomial forms has been investigated to speed up the search for the solution. Finally, experimental results are presented
Computing rigorous bounds to the accuracy of calibrated stereo reconstruction
No full textThe authors deal with the problem of computing rigorous bounds on the position of 3-D points obtained by stereo triangulation when both the camera matrix and the coordinates of image points are affected by measurement errors. By ‘rigorous bounds’ it is meant that the true unknown 3-D points are guaranteed to lie within the intervals computed by the method, with mathematical certainty. To this end, the calibration process is first modelled by assuming a bounded error in the localisation of the reference points in the image, then narrow intervals are computed for the entries of the camera matrix using numerical methods based on interval analysis. Finally, triangulation is applied to obtain cuboids that bound point coordinates. Two state-of-the-art methods were employed for the solution of linear systems of interval equations, namely Rump’s and Shary’s methods. It is concluded that a careful selection of numerical techniques allows the use of interval analysis as a tool for obtaining realistic bounds on the output error, even in the presence of significant errors in the input data
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