plantation of fast-growing species such as poplar is one of the important methods for wood production in the countries with low natural forest areas. physiological differences of populus deltoides clones planted through three decades in shast kalate research forest are unknown. peroxidase enzyme in this research was used for clone separation as a biochemical marker that is sensitive to environm...

We study a model of random graphs where each edge is drawn independently (but not necessarily identically distributed) from the others, and then assigned weight. When mean degree such graph low, it known that spectrum adjacency matrix $A$ deviates significantly its expected value $\mathbb{E} A$ . In contrast, we show over wide range parameters top eigenvalues non-backtracking $B$ – whose powers...

Abstract Background The aim of this study was to characterize the transmission chains and clusters COVID-19 infection in Tunisia. Methods All cases were confirmed by Reverse Transcriptase Polymerase Chain Reaction a nasopharyngeal specimen. Contact tracing is undertaken for all order identify close contacts that will be systematically screened quarantined. Transmission identified based on field...

La survenue d'un épanchement péricardique au cours d'une hypothyroïdie est fréquente. Ce fait justifie la réalisation d'une échocardiographie lors du diagnostic et du suivi évolutif des hypothyroïdies. Les signes de mauvaise tolérance de cet épanchement sont rares et la constitution d'une tamponnade péricardique n'est que très rarement rapportée. Ce travail se base sur l'étude rétrospective de ...

Abstract We study statistical and computational limits of clustering when the means centres are sparse their dimension is possibly much larger than sample size. Our theoretical analysis focuses on model $X_i=z_i \theta +\varepsilon _{i}, \ z_i \in \{-1,1\}, \varepsilon _i \thicksim \mathcal{N}(0, I)$, which has two clusters with $\theta $ $-\theta $. provide a finite new algorithm based Princip...

We study the dynamics of the distribution of wealth in an overlapping generation economy with …nitely lived agents and inter-generational transmission of wealth. Financial markets are incomplete, exposing agents to both labor and capital income risk. We show that the stationary wealth distribution is a Pareto distribution in the right tail and that it is capital income risk, rather than labor i...

Abstract We introduce and study a one parameter deformation of the polynuclear growth (PNG) in (1+1)-dimensions, which we call $t$-PNG model. It is defined by requiring that, when two expanding islands merge, with probability $t$ they sprout another island on top merging location. At $t=0$, this becomes standard (non-deformed) PNG model droplet geometry, can be reformulated through longest incr...

We study the properties of spin-less non-interacting fermions trapped in a confining potential one dimension but presence or more impurities which are modelled by delta function potentials. use method based on single particle Green's function. For impurity placed bulk, we compute density Fermi gas near impurity. Our results, addition to recovering Friedel oscillations at large distance from imp...

Introduction: The initial medical certificate (CMI) is a medico-legal document of great importance. Writing CMIs frequent act in emergency medicine. In 2011, the Haute Authority Medicine (HAS) published good practice recommendations concerning writing and content these certificates. Nevertheless, this faces difficult reality services. aim study was to analyze quality terms compliance all criter...

We revisit the problem of an elastic line (e.g. a vortex in superconductor) subject to both columnar disorder and point dimension $d=1+1$. Upon applying transverse field, delocalization transition is expected, beyond which tilted macroscopically. investigate this fixed tilt angle ensemble within one-way model where backward jumps are neglected. From recent results about directed polymers their ...