Spinodal decomposition, nuclear fog and two characteristic volumes in thermal multifragmentation

Thermal multifragmentation of hot nuclei is interpreted as the nuclear liquid-fog phase transition inside the spinodal region. The experimental data for p(8.1GeV) + Au collisions are analyzed within the framework of the statistical multifragmentation model (SMM) for the events with emission of at least two IMFs. It is found that the partition of hot nuclei is specified after expansion to a volume equal to Vt = (2.6+-0.3) Vo, with Vo as the volume at normal density. However, the freeze-out volume is found to be twice as large: Vf = (5+-1) Vo.Comment: 8 pages, 6 figures, to be published in Nucl.Phys.

Nuclear multifragmentation and fission: similarity and differences

Thermal multifragmentation of hot nuclei is interpreted as the nuclear liquid--fog phase transition deep inside the spinodal region. The experimental data for p(8.1GeV) + Au collisions are analyzed. It is concluded that the decay process of hot nuclei is characterized by two size parameters: transition state and freeze-out volumes. The similarity between dynamics of fragmentation and ordinary fission is discussed. The IMF emission time is related to the mean rupture time at the multi-scission point, which corresponds to the kinetic freeze-out configuration.Comment: 7 pages, 3 Postscript figures, Proceedings of IWM 2005, Catani

Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set

We report a measurement of the bottom-strange meson mixing phase \beta_s using the time evolution of B0_s -> J/\psi (->\mu+\mu-) \phi (-> K+ K-) decays in which the quark-flavor content of the bottom-strange meson is identified at production. This measurement uses the full data set of proton-antiproton collisions at sqrt(s)= 1.96 TeV collected by the Collider Detector experiment at the Fermilab Tevatron, corresponding to 9.6 fb-1 of integrated luminosity. We report confidence regions in the two-dimensional space of \beta_s and the B0_s decay-width difference \Delta\Gamma_s, and measure \beta_s in [-\pi/2, -1.51] U [-0.06, 0.30] U [1.26, \pi/2] at the 68% confidence level, in agreement with the standard model expectation. Assuming the standard model value of \beta_s, we also determine \Delta\Gamma_s = 0.068 +- 0.026 (stat) +- 0.009 (syst) ps-1 and the mean B0_s lifetime, \tau_s = 1.528 +- 0.019 (stat) +- 0.009 (syst) ps, which are consistent and competitive with determinations by other experiments.Comment: 8 pages, 2 figures, Phys. Rev. Lett 109, 171802 (2012

Saethre-Chotzen syndrome : cranofacial anomalies caused by genetic changes in the TWIST gene

In this thesis, one of the most frequently occurring and most variable craniosynostosis syndromes was investigated; Saethre-Chotzen syndrome. Craniosynostosis is the premature obliteration of cranial sutures in the developing embryo. It can also occur in the first few months of life. Saethre-Chotzen syndrome is, besides craniosynostosis, characterized by specific facial and limb abnormalities, of which the most frequently reported are ptosis, prominent crus helicis, cutaneous syndactyly of digit 2 and 3 on both hands and feet, and broad halluces. Saethre-Chotzen syndrome has been linked to the TWIST gene on chromosome 7p21.1. Mutations in and variably sized deletions of this gene can be found in patients with clinical features of Saethre-Chotzen syndrome. The latter, TWIST deletions, often also include part of the surrounding chromosome 7p and are reported to be associated with mental retardation. In Saethre-Chotzen patients, in whom neither a mutation nor a deletion of TWIST had been found, the FGFR3 P250R mutation was in some cases detected. This mutation has specifically been linked to Muenke syndrome that is characterized by unior bicoronal synostosis and slight facial dysmorphology. However, a Saethre-Chotzen like phenotype can also result from this mutation. Because of the possible overlap of Saethre-Chotzen with Muenke syndrome, these syndromes were studied in order to provide clinical criteria that discriminate between the two (chapter 4). Many phenotypic features occur in both syndromes. In addition, although unicoronal synostosis occurs slightly more frequently in Muenke syndrome, unicoronal and bicoronal synostosis are seen in both syndromes. The discrimination between Saethre-Chotzen and Muenke is often not made easily and the associated genes, TWIST and FGFR3, respectively, are simultaneously tested for pathogenic m

W boson polarization measurement in the ttbar dilepton channel using the CDF II Detector

We present a measurement of $W$ boson polarization in top-quark decays in $t\bar{t}$ events with decays to dilepton final states using $5.1 {\rm fb^{-1}}$ of integrated luminosity in $p\bar{p}$ collisions collected by the CDF II detector at the Tevatron. A simultaneous measurement of the fractions of longitudinal ($f_0$) and right-handed ($f_+$) $W$ bosons yields the results $f_0 = 0.71 ^{+0.18}_{-0.17} {\rm (stat)} \pm 0.06 {\rm (syst)}$ and $f_+ = -0.07 \pm 0.09 {\rm (stat)} \pm 0.03 {\rm (syst)}$. Combining this measurement with our previous result based on single lepton final states, we obtain $f_0 = 0.84 \pm 0.09 {\rm (stat)} \pm 0.05 {\rm (syst)}$ and $f_{+} = -0.16 \pm 0.05 {\rm (stat)} \pm 0.04 {\rm (syst)}$. The results are consistent with standard model expectation.Comment: Published in Phys. Lett.

Observation of the Y(4140)Y(4140) structure in the J/ψ ϕJ/\psi\,\phi Mass Spectrum in B±→J/ψ ϕKB^\pm\to J/\psi\,\phi K cays

The observation of the $Y(4140)$ structure in $B^\pm\rightarrow J/\psi\,\phi K^\pm$ decays produced in $\bar{p} p$ collisions at \sqrt{s}=1.96~\TeV is reported with a statistical significance greater than 5 standard deviations. A fit to the $J/\psi\,\phi$ mass spectrum is performed assuming the presence of a Breit-Wigner resonance. The fit yields a signal of $19^{+6}_{-5}$ resonance events, and resonance mass and width of 4143.4^{+2.9}_{-3.0}(\mathrm{stat})\pm0.6(\mathrm{syst})~\MeVcc and 15.3^{+10.4}_{-6.1}(\mathrm{stat})\pm2.5(\mathrm{syst})~\MeVcc respectively. The parameters of this resonance-like structure are consistent with values reported from an earlier CDF analysis.Comment: 7 pages, 2 figures, submited to Phys. Rev. Let

Model of distributing of frequency channels taking into account territorial remoteness of the stations in multichannel mesh-networks

Проведен краткий обзор алгоритмов распределения частотных каналов в многоканальных mesh-сетях. Предложена математическая модель распределения каналов в многоканальных mesh-сетях с учетом территориальной удаленности mesh-станций.Проведений короткий огляд алгоритмів розподілу частотних каналів в багатоканальних mesh-мережах. Запропонована математична модель розподілу каналів в багатоканальних mesh-мережах з урахуванням територіальної віддаленості mesh-станцій.The brief review of algorithms of distributing of frequency channels is conducted in multichannel mesh-networks. The mathematical model of distributing of channels is offered in multichannel mesh-networks taking into account the territorial remoteness of the mesh-stations

Unexpected hydrolytic transformation of new type hybrid bromobismuthates with methylpyrazinium dications

A series of new type hybrid bromobismuthates formed by various pyrazinium cations were isolated and studied. In the systems initially containing iodide anions and monocations of substituted pyrazines, the complexes based on doubly charged cations of substituted pyrazines instead of ones based on the corresponding monocations were surprisingly formed. The variation of substituted pyrazinium cations affects not only the crystal structures of hybrid bromobismuthates via tuning the nuclearity of the anions but also the hydrolytic stability of the compounds. A thorough structural study of hydrolytic transformations was performed for halobismuthates for the first time. The results revealed a stepwise course of the process affording several products. Spectral studies of the complexes evidence that the values of optical band gaps (Eg) are low in comparison with those for similar systems which is most likely due to the cooperative effect involving the nature of the corresponding cations together with the features of the supramolecular structures of the complexes. © The Royal Society of Chemistry 2019

Method of detection of viral attacks on basis of analysis of network traffic

Рассматриваются вопросы детектирования вирусных атак на основе анализа сетевого трафика мультисервисных сетей с помощью BDS-теста. Предложен новый подход к детектированию сетевых вирусных атак. Приводятся результаты экспериментальных исследований различных видов сетевого трафика BDS-тестом, позволяющие определить наличие вирусного воздействия.Розглядаються питання детектування вірусних атак на основі аналізу мережевого трафіку мультисервісних мереж за допомогою BDS-теста. Запропоновано новий підхід до детектування мережевих вірусних атак. Наводяться результати експериментальних досліджень різних видів мережевого трафіку BDS-тестом, що дозволяють визначити наявність вірусного впливу.The questions of detection of viral attacks are examined on the basis of analysis of network traffic of multiservice networks by a BDS-test. The new going is offered near detection of network viral attacks. Results over of experimental researches of different types of network traffic are brought by a BDS-test, allowing to define the presence of viral influence

Spectral sensing pulses under influence of white noise with procedures "sliding window" and a decision by the majority principle

Представлені результати імітаційного моделювання методу спектрального детектування з використанням еталонної бази прийнятих сигналів на основі процедури "ковзного вікна". Запропонований підхід дозволив проаналізувати кожен біт інформаційного потоку в складі декількох різних пакетів та за різної реалізації шуму, що змінювався разом з додаванням нових бітів та пов’язаним з ними шумом до складу пакету. Для прийняття рішення про остаточне значення біту, використано мажоритарний метод із вилученням з аналізу найгіршого результату. Визначені напрямки подальших досліджень.Представлены результаты имитационного моделирования метода спектрального детектирования с использованием эталонной базы принимаемых сигналов на основе процедуры "скользящего окна". Предложенный подход позволил проанализировать каждый бит информационного потока в составе нескольких различных пакетов и в другой реализации шума, который менялся вместе с добавлением новых битов и связанным с ними шумом в составе пакета. Для принятия решения об окончательном значении бита, использован мажоритарный метод с изъятием из анализа наихудшего результата. Определены направления дальнейших исследований.The results of the simulation method of spectral detection using a "sliding window" reference base of the received signals on the basis of the procedure. The proposed approach has allowed to analyze every bit of information flow as part of a number of different packages and in another embodiment, the noise, which is changed with the addition of new bits and associated noise in the package. To make a decision on the final value of the bit, the majority used the method with the withdrawal from the analysis of the worst results. The directions for further research