Seismic coherence measure in presence of residual trace-to-trace time delay variations

В работе после сопоставительного анализа меры когерентности и предполагаемой модели сейсмической записи предложен новый метод оценки когерентности. Метод обеспечивает большую чувствительность когерентности в присутствии остаточных временных сдвигов после учета локального наклона в окне анализа. Он основан на более реалистичной модели сейсмической записи, которая допускает произвольные вариации амплитуды сигнала, дисперсии помехи и остаточных временных сдвигов. Новый метод апробирован на теоретических и реальных данных.В роботі після порівнювального аналізу міри когерентності та передбачуваної моделі сейсмічного запису запропоновано новий метод оцінки когерентності. Метод забезпечує більшу чутливість когерентності у присутності залишкових часових зсувів після врахування локального нахилу у вікні аналізу. Він ґрунтується на більш реалістичній моделі сейсмічного запису, яка допускає довільні варіації амплітуди сигналу, дисперсії завади та залишкових часових зсувів. Новій метод апробовано на теоретичних та реальних даних.In the paper after analyzing the relation of coherence to the supposed mathematical model of seismic data, a new method is presented. It makes coherence more sensitive to the presence of residual time delay fluctuations of the signal after removal of its average local dip in the analysis window. The method is based on a more realistic data model that permits arbitrary trace-to-trace variations in signal amplitude, signal time delay and noise variance. The novel method is tested and compared with conventional approaches on synthetic and field data sets

Study of Two-Photon processes at low Q2 using the VSAT calorimeter in the DELPHI experiment

The study is based on data collected at the LEP II accelerator during the second period of the Large Electron-Positron collider operations (1996-2000). During that time the DELPHI (DEtector with Lepton, Photon and Hadron Identification) experiment collected about 90 Gb of data on tape corresponding to 687-691 pb-1 of luminosity. The data obtained by the VSAT (Very Small Angle Tagger) electromagnetic calorimeter was stored and used for luminosity measurements and for gamma-gamma physics analysis. The analysis was concentrated on single and double tag events. Three Monte Carlo sets were generated for years 1998-2000 using three different generators (PYTHIA, PHOJET and TWOGAM). Gamma-gamma physics at such high energies (189-206 GeV in the c.m.s.) and small polar angles (3-12 mrad) is unique. Background and beam conditions influenced the analysis and were studied in order to obtain a "clean" signal with as little background as possible. The total hadronic cross-sections for different invariant mass were estimated. The upgrade of the VSAT data-taking software and some hardware problems due to aging were also discussed. The articles in the Appendices are connected with VSAT data-taking and the two-photon physics analysis. Appendix A, is the VSAT status report with estimation of VSAT performance for higher energies. The situation with the VSAT detector hardware and software upgrades are explained in the article. Appendix B, was written during the summer of 1999. The main subject of the article is the background condition in VSAT, STIC and other calorimeters. Some effective methods of removing background are proposed for each of the DELPHI calorimeters. Appendix C, describes problems of the long-time radiation damage and the short periods of high background which caused an increase of the bias currents in the VSAT modules. Appendix D, summarizes all beam parameters changes, position shifts of the VSAT modules observed by geometrical surveys and consequences of that during LEP II period. Appendix E, is devoted to the two-photons physics analysis of the DELPHI - VSAT data. The final analysis of two-photon events in double and single tag modes is presented

On QCD analysis of stucture function F2γF_2^{\gamma} in alternative approach

The alternative approach to QCD analysis of the photon structure function $F_2^{\gamma}$ is presented. It differs from the conventional one by the presence of the terms which in conventional approach appear in higher orders. We show that this difference concerns also the photonic parton distribution functions. In the alternative approach, the complete LO analysis of $F_2^{\gamma}$ can be performed as all required quantities are known. At the NLO, however, one of the coefficient function is so far not available and thus only the photonic parton distribution function can be computed and compared to those of standard approach. We discuss the numerical difference of these approaches at the LO and the NLO approximation and show that in case of $F_2^{\gamma}$ this difference is non-negligible and may play an important role in the analysis on photon data of the future experiments.Comment: 25 page

Use of the lost seismic infor-mation about upper part of geological structure for the not prospecting purposes

Показаны результаты переобработки потерянной в процессе поисков углеводородов сейсмической информации для картирования скоростной характеристики (скорости продольных волн) верхней части геологического разреза для сокращения дорогостоящих инженерно- поисковых работ для промышленного и гражданского строительства и успешного развития точного земледелия на территории нефтегазовых регионов.Показано результати переобробки втраченої в процесі пошуків вуглеводнів сейсмічної інформації для картування швидкісної характеристики (швидкості поздовжніх хвиль) верхньої частини геологічного розрізу для скорочення дорогих інженерно-пошукових робіт для промислового та цивільного будівництва та успішного розвитку точного землеробства на території нафтогазових регіонів.The results of reprocessing of the lost (in hydrocarbon prospecting process) seismic information for the mapping of velocity characteristic (velocity of longitudinal waves) of the upper part of geological structure for reduction of expensive engineering-prospecting works for industrial and civil construction and for successful development of precise agriculture on the territory of oil and gas regions is shown

Дослідження наукової спадщини М. С. Бокаріуса — обов’язок працівників наукової установи, що носить його ім’я

A significant part of the scientific heritage of M. S. Bokarius, including reports, overviews, and reviews of the works of leading forensic medical examiners and lawyers from around the world has no bibliographic description and has not been put into scientific circulation. Throughout the pages of "Archives of Criminology and Forensic Medicine" and the Ukrainian-language journal: "Issues of Criminalistics and Forensic Science", the scientist reviewed more than 80 research papers. The peculiarity of the Editorial Board of Bokarius "Archives…" was that a significant number of reviews, overviews, etc., was published by the edition. Mykolai Serhiiovych is an author of more than 70 full-fledged analytical reports; and another 10 in the journal: "Issues of Criminalistics and Forensic Science". The scientist reviewed not only articles, textbooks, monographs by domestic authors, but also research papers of many foreign forensic scientists and criminologists from all over Europe, the USA, Japan, and countries of South America. Reports of scientific articles were reproduced in the journal in French, German and English, Italian and Spanish. All this became possible due to the fact that Mykolai Serhiiovych himself was a gifted linguist and spoke 17 foreign languages. The Article Purpose is a scientific search for new works by the scientist and a fundamental study of 5 issues of the "Archives of Criminology and ForensicMedicine" published in 1926—1927 and 6 issues of the "Issues of Criminalistics and Forensic Science" journal for 1931.Значна частина наукової спадщини М. С. Бокаріуса залишилася поза увагою бібліографів: зокрема, його рецензії на статті, підручники та монографії вітчизняних авторів, а також на праці закордонних судових медиків, криміналістів і юристів (усього понад 80) 2. Особливістю редакційної політики «Архіву кримінології та судової медицини» і журналу «Питання криміналістики та науково-судової експертизи» була значна кількість рецензій, оглядів та ін. Мета статті полягає в науковому пошуку нових праць М. С. Бокаріуса та фундаментальному дослідженні 5 випусків «Архіву кримінології та судової медицини» за 1926—1927 рр. і журналу «Питання криміналістики та науково-судової експертизи» № 1—6 за 1931 р

A New 5 Flavour NLO Analysis and Parametrizations of Parton Distributions of the Real Photon

New, radiatively generated, NLO quark (u,d,s,c,b) and gluon densities in a real, unpolarized photon are presented. We perform three global fits, based on the NLO DGLAP evolution equations for Q^2>1 GeV^2, to all the available structure function F_2^gamma(x,Q^2) data. As in our previous LO analysis we utilize two theoretical approaches. Two models, denoted as FFNS_{CJK}1 & 2 NLO, adopt the so-called Fixed Flavour-Number Scheme for calculation of the heavy-quark contributions to F_2^gamma(x,Q^2), the CJK NLO model applies the ACOT(chi) scheme. We examine the results of our fits by a comparison with the LEP data for the Q^2 dependence of the F_2^gamma, averaged over various x-regions, and the F_2,c^gamma. Grid parametrizations of the parton densities for all fits are provided.Comment: 49 pages, 27 postscript figures; FORTRAN programs available at http://www.fuw.edu.pl/~pjank/param.htm

Uncertainties of the CJK 5 Flavour LO Parton Distributions in the Real Photon

Radiatively generated, LO quark (u,d,s,c,b) and gluon densities in the real, unpolarized photon, calculated in the CJK model being an improved realization of the CJKL approach, have been recently presented. The results were obtained through a global fit to the experimental F2^gamma data. In this paper we present, obtained for the very first time in the photon case, an estimate of the uncertainties of the CJK parton distributions due to the experimental errors. The analysis is based on the Hessian method which was recently applied in the proton parton structure analysis. Sets of test parametrizations are given for the CJK model. They allow for calculation of its best fit parton distributions along with F2^gamma and for computation of uncertainties of any physical value depending on the real photon parton densities. We test the applicability of the approach by comparing uncertainties of example cross-sections calculated in the Hessian and Lagrange methods. Moreover, we present a detailed analysis of the chi^2 of the CJK fit and its relation to the data. We show that large chi^2/DOF of the fit is due to only a few of the experimental measurements. By excluding them chi^2/DOF approx 1 can be obtained.Comment: 28 pages, 8 eps figures, 2 Latex figures; FORTRAN programs available at http://www.fuw.edu.pl/~pjank/param.html; table 10, figure 10 and section 6 correcte

Increase of efficiency of soil remediation near stores of radioactive wastes

Однієї з основ сталого розвитку України є сучасний ядерно-паливний цикл (комплекс). Але цей комплекс має великий потенціал забруднення ресурсів ґрунту. Ця проблема в Україні може бути вирішена тільки на основі Європейських стандартів за допомогою широкого впровадження сучасних процедур очищення ґрунту від радіоактивного забруднення (накопиченого протягом півстоліття функціонування ядерної промисловості колишнього Радянського Союзу). CLEANSOIL - проста і фінансово ефективна сучасна технологія, що дозволяє in-situ витяг небезпечних речовин із ґрунту на досить великих площах забрудненої землі з мінімальними порушеннями поверхні. Потреба ефективних методів виявлення й оцінки такого забруднення навколишнього середовища об'єктами ядерно-паливного циклу визначила спеціальний комплекс радіологічних досліджень (потужність експозиційної дози γ-випромінювання, питома активність ґрунту і рослинності) як цінний, не агресивний до навколишнього середовища і дешевий інструмент.Одной из основ устойчивого развития Украины является современный ядерно- топливный цикл (комплекс). Но этот комплекс имеет большой потенциал загрязнения ресурсов почвы. Эта проблема в Украине может быть решена только на основе Европейских стандартов посредством широкого внедрения современных процедур очистки почвы от радиоактивного загрязнения (накопленного в течение полстолетия функционирования ядерной промышленности бывшего Советского Союза). CLEANSOIL - простая и финансово-эффективная современная технология, которая позволяет in-situ извлечение опасных веществ из почвы на достаточно больших площадях загрязненной земли с минимальными нарушениями поверхности. Потребность эффективных методов обнаружения и оценки такого загрязнения окружающей среды объектами ядерно- топливного цикла определила специальный комплекс радиологических исследований (мощность экспозиционной дозы γ-излучения, удельная активность почвы и растительности) как ценный, не агрессивный к окружающей среде и дешевый инструмент.One of bases of the sustainable development of Ukraine is the modern nuclear fuel cycle (complex). But the complex has great potential of pollution in soil resources. The problem in Ukraine can be resolved only on the basis of the European standards by means of wide intrusion of modern procedures of clearing of soil from radioactive pollution (collected during half-century functioning of the nuclear industry of the former Soviet Union). CLEANSOIL is a very simple and costefficient modern technology to enable in-situ treatment of hazardous substances in soil, especially targeted for large areas of polluted land and causing minimum site disturbance. The need of viable methods of detecting and evaluating such environmental contamination by objects of nuclear fuel cycle has made the special complex of radiological researches (capacity an exposition doze of γ- radiation, specific activity of soil and vegetation) to be valuable tools, thanks to their non invasive characteristics and low cost investigation

Hypernuclei as chiral solitons

The identification of flavored multiskyrmions with the ground states of known hypernuclei is successful for several of them, e.g. for isodoublet H(Lambda) - He(Lambda), A=4, isoscalars He(Lambda) (A=5) and Li(Lambda) (A=7). In other cases agreement is not so good, but the behaviour of the binding energy with increasing baryon number is in qualitative agreement with data. Charmed or beauty hypernuclei within this approach are predicted to be bound stronger than strange hypernuclei. This conclusion is stable against variation of poorly known heavy flavor decay constants.Comment: 9 pages, 1 Fig. Presented at the International Workshops on Nuclear and Particle Physics at 50-Gev PS, NP01 (KEK, Japan, December 2001) and NP02 (Kyoto, Japan, September 2002). Some additions and corrections of numerical results are mad

Vacuum Cherenkov effect in logarithmic nonlinear quantum theory

We describe the radiation phenomena which can take place in the physical vacuum such as Cherenkov-type shock waves. Their macroscopical characteristics - cone angle, flash duration, radiation yield and spectral distribution - are computed. It turns out that the radiation yield is proportional to the square of the proper energy scale of the vacuum which serves also as the vacuum instability threshold and the natural ultraviolet cutoff. While the analysis is mainly based on the theory engaging the logarithmic nonlinear quantum wave equation, some of the obtained results must be valid for any Lorentz-invariance-violating theory describing the vacuum by (effectively) continuous medium in the long-wavelength approximation.Comment: Updates: v2: changed title, added comments about vacuum instability and Hawking radiation, added some refs previously missed due to certain linguistic subtlety, v3 [pub]: removed comments about Hawking radiation (requested by referees as it requires a separate study), changed title, added more ref