883 research outputs found
A low computational approach for assistive esophageal adenocarcinoma and colorectal cancer detection
© Springer Nature Switzerland AG 2019. In this paper, we aim to develop a low-computational system for real-time image processing and analysis in endoscopy images for the early detection of the human esophageal adenocarcinoma and colorectal cancer. Rich statistical features are used to train an improved machine-learning algorithm. Our algorithm can achieve a real-time classification of malign and benign cancer tumours with a significantly improved detection precision compared to the classical HOG method as a reference when it is implemented on real time embedded system NVIDIA TX2 platform. Our approach can help to avoid unnecessary biopsies for patients and reduce the over diagnosis of clinically insignificant cancers in the future.Published versio
Maximum parsimony based resolution of inter-species phylogenetic relationships in citrus l. (Rutaceae) using its of rDNA
The present study aims to analyse phylogenetic relationships, using internal transcribed spacer sequence data of ribosomal DNA (rDNA), across 24 Citrus species and close relatives by the evaluation of several parameters such as nucleotide substitution (r), nucleotide diversity (Ď€) and the estimated values of transition/transversion bias (R). The observed results indicated the presence of a wide divergence pattern of rDNA in subfamily Aurantioideae. Maximum parsimony (MP) analysis inferred divergence pattern in the Citrus genus. We observed seven strongly supported clades among the subfamily Aurantioideae. We postulate that the present investigation provides a more robust topology of Citrus and its close relatives, which can significantly prove as an additional support to resolve the phylogenetic relationships in Citrus genera. Therefore, sequences of noncoding regions should exhibit more phylogenetically informative sites than the coding regions do, which is in accordance with the present study
Biosorption of heavy metals (Copper, Nickel) and dye (Methylene Bleu) from aqueous solution onto southern Algerian carob shells
A raw carob shells was used as biosorbent for removal of copper, nickel and methylene blue from aqueous solution. The adsorbent was characterized by thermal gravimetric analysis (TGA), The Brunauer-Emmett-Teller (BET) surface area, and the point of zero charge (pHPZC).Biosorption experiments were carried out as function of solution pH, biosorbent dosage, contact time and initial ions concentration. Experimental results show that maximum biosorption capacity of 4.0, 3.91 and 13.17, mg/g for Cu (II), Ni (II) and MB respectively, occurred at an initial concentration of 100 mg/L, and temperature of 20 °C. Kinetic data were best fitted with pseudo-second-order. Biosorption isotherms were best correlated with Langmuir model for MB and Freundlich model for Cu (II) and Ni (II)
Exact Results for a Three-Body Reaction-Diffusion System
A system of particles hopping on a line, singly or as merged pairs, and
annihilating in groups of three on encounters, is solved exactly for certain
symmetrical initial conditions. The functional form of the density is nearly
identical to that found in two-body annihilation, and both systems show
non-mean-field, ~1/t**(1/2) instead of ~1/t, decrease of particle density for
large times.Comment: 10 page
Model of Cluster Growth and Phase Separation: Exact Results in One Dimension
We present exact results for a lattice model of cluster growth in 1D. The
growth mechanism involves interface hopping and pairwise annihilation
supplemented by spontaneous creation of the stable-phase, +1, regions by
overturning the unstable-phase, -1, spins with probability p. For cluster
coarsening at phase coexistence, p=0, the conventional structure-factor scaling
applies. In this limit our model falls in the class of diffusion-limited
reactions A+A->inert. The +1 cluster size grows diffusively, ~t**(1/2), and the
two-point correlation function obeys scaling. However, for p>0, i.e., for the
dynamics of formation of stable phase from unstable phase, we find that
structure-factor scaling breaks down; the length scale associated with the size
of the growing +1 clusters reflects only the short-distance properties of the
two-point correlations.Comment: 12 page
Crossover from Rate-Equation to Diffusion-Controlled Kinetics in Two-Particle Coagulation
We develop an analytical diffusion-equation-type approximation scheme for the
one-dimensional coagulation reaction A+A->A with partial reaction probability
on particle encounters which are otherwise hard-core. The new approximation
describes the crossover from the mean-field rate-equation behavior at short
times to the universal, fluctuation-dominated behavior at large times. The
approximation becomes quantitatively accurate when the system is initially
close to the continuum behavior, i.e., for small initial density and fast
reaction. For large initial density and slow reaction, lattice effects are
nonnegligible for an extended initial time interval. In such cases our
approximation provides the correct description of the initial mean-field as
well as the asymptotic large-time, fluctuation-dominated behavior. However, the
intermediate-time crossover between the two regimes is described only
semiquantitatively.Comment: 21 pages, plain Te
Scaling Approach to Calculate Critical Exponents in Anomalous Surface Roughening
We study surface growth models exhibiting anomalous scaling of the local
surface fluctuations. An analytical approach to determine the local scaling
exponents of continuum growth models is proposed. The method allows to predict
when a particular growth model will have anomalous properties () and to calculate the local exponents. Several continuum growth
equations are examined as examples.Comment: RevTeX, 4 pages, no figs. To appear in Phys. Rev. Let
Development that works, March 31, 2011
This repository item contains a single issue of the Pardee Conference Series, On March 31, 2011, more than 100 people participated in a conference titled
“Development That Works,” sponsored by Boston University’s Frederick S.
Pardee Center for the Study of the Longer-Range Future in collaboration with the
BU Global Development program. In the pages that follow, four essays written
by Boston University graduate students capture the salient points and overarching
themes from the four sessions, each of which featured presentations by
outstanding scholars and practitioners working in the field of development. The
conference agenda and speakers’ biographies are included following the essays.The theme and the title of the conference—”Development That Works”—stemmed from the conference organizers’ desire to explore, from a groundlevel perspective, what programs, policies, and practices have been shown—or appear to have the potential—to achieve sustained, long-term advances in
development in various parts of the world. The intent was not to simply showcase
“success stories,” but rather to explore the larger concepts and opportunities
that have resulted in development that is meaningful and sustainable
over time. The presentations and discussions focused on critical assessments
of why and how some programs take hold, and what can be learned from
them. From the influence of global economic structures to innovative private sector
programs and the need to evaluate development programs at the
“granular” level, the expert panelists provided well-informed and often provocative
perspectives on what is and isn’t working in development programs
today, and what could work better in the future
Dynamic Scaling of an Adsorption-Diffusion Process on Fractals
A dynamic scaling of a diffusion process involving the Langmuir type
adsorption is studied. We find dynamic scaling functions in one and two
dimensions and compare them with direct numerical simulations, and we further
study the dynamic scaling law on fractal surfaces. The adsorption-diffusion
process obeys the fracton dynamics on the fractal surfaces.Comment: 9 pages, 7 figure
ANALISIS PENGARUH KUALITAS BENANG TERHADAP WAKTU PROSES PRODUKSI KAIN
There is possibility that differences in the quality of raw materials received from the company's suppliers happened. Thus the textile company, the differences of raw materials allows differences in both overall and each stage production process time. From this condition, it is necessary to analyze relationship between quality of raw material and production process time, then the production time can be predicted, and available labor can be optimally allocated. In addition, analysis of this relationship can also be used as guidelines to determine production process time at a certain number of orders based on the thread as raw material quality to be produced. This research used regression analysis, F test, and determination coefficient test. It resulted that both tensile strength and elongation on warping, sizing, weaving and inspecting process influence the change of production time. While in the ricing and folding process, both tensile strength and elongation did not influence the change of production time
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