The history of plutonium and cesium-137 contamination of the Ob River delta sediments

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1996.Includes bibliographical references (leaves 129-138).by George P. Panteleyev.M.S

Urinary Continence Recovery after Radical Prostatectomy-Anatomic/Reconstructive and Nerve Sparing Techniques to Improve Outcomes

In an editorial board moderated debate format, two experts in prostate cancer surgery are challenged with presenting the key strategies in radical prostatectomy that improve urinary functional outcomes. Dr Bernardo Rocco was tasked with arguing the facts that support the anatomic preservation and reconstruction steps that improve continence. Drs. Christian Pavlovich and Sasha Druskin were tasked with arguing the facts supporting neurovascular bundle and high anterior release surgical planes that improve continence. Associate Editor John Davis moderates the debate, and outlines the current status of validated patient questionnaires that can be used to evaluate urinary continence, and recent work that allows measuring what constitutes a "clinically significant" difference that either or both of these surgical techniques could influence. A review of raw data from a publication from Dr. Pavlovich's team demonstrates how clinically relevant differences in patient reported outcomes can be correlated to technique. A visual atlas is presented from both presenting teams, and Dr. Davis demonstrates further reproducibility of technique. This article is protected by copyright. All rights reserved

Controlling Explosive Sensitivity of Energy-Related Materials by Means of Production and Processing in Electromagnetic Fields

The present work is one of the world first attempts to develop effective methods for controlling explosive sensitivity of energy-related materials with the help of weak electric (up to 1 mV/cm) and magnetic (0.001 T) fields. The resulting experimental data can be used for purposeful alternation of explosive materials reactivity, which is of great practical importance. The proposed technology of producing and processing materials in a weak electric field allows forecasting long-term stability of these materials under various energy impacts

Generation and Analysis of Wire Rope Digital Radiographic Images

The paper is dealt with different structures of the digital radiographic system intended for wire rope radiography. The scanning geometry of the wire rope is presented and the main stages of its digital radiographic image generation are identified herein. Correction algorithms are suggested for X-ray beam hardening. A complex internal structure of the wire rope is illustrated by its 25 mm diameter image obtained from X-ray computed tomography. The paper considers the approach to the analysis of digital radiographic image algorithms based on the closeness of certain parameters (invariants) of all unit cross-sections of the reference wire rope or its sections with the length equaling to the lay. The main invariants of wire rope radiographic images are identified and compared with its typical defects

Diphtheria rare localization in adults

Last 25 years in the country established sporadic diphtheria morbidity (less than 0.1 per 100 000 people). In this situation, the attention of medical specialists pre-hospital and hospital health care system is reduced, especially for diseases with a rare localization of pathological process. Mentioned circumstances contribute to delayed diagnosis and treatment of his patients, the major cause of complicated infection, often its unfavorable outcome and a factor of the epidemic of trouble for the infection. The authors present material evidence that the rare forms of diphtheria in the period of sporadic disease in much the same as in the epidemic, and describe the clinical manifestations and course of diphtheria of the nose, eyes, throat, genitals, mouth and gastrointestinal tract in modern conditions

Terahertz superlattice parametric oscillator

We report a GaAs/AlAs superlattice parametric oscillator. It was pumped by a microwave field (power few mW) and produced 3rd harmonic radiation (frequency near 300 GHz). The nonlinearity of the active superlattice was due to Bragg reflections of conduction electrons at the superlattice planes. A theory of the nonlinearity indicates that parametric oscillation should be possible up to frequencies above 10 THz. The active superlattice may be the object of further studies of predicted extraordinary nonlinearities for THz fields.Comment: 10 pages, 4 figure

Brownian motion exhibiting absolute negative mobility

We consider a single Brownian particle in a spatially symmetric, periodic system far from thermal equilibrium. This setup can be readily realized experimentally. Upon application of an external static force F, the average particle velocity is negative for F>0 and positive for F<0 (absolute negative mobility).Comment: 4 pages, 3 figures, to be published in PR

A Line Through the Sacred Lands of the Altai Mountains: Perspectives on the Altai Pipeline Project

In 2006 preliminary plans were made public showing that Gazprom intended to construct a pipeline through the Altai republic (Russia, south-west Siberia). Unfortunately, there was almost no attention to integrating the conservation of cultural heritage (both archaeological and landscape) into the planning of the pipeline, though the Altai is well-known for its rich cultural heritage. Hitherto, no assessment has been made of the potential impact of the project, nor did Gazprom release detailed information about the exact course of the route. The present article aims to illustrate the potential impact of the pipeline based on a detailed study of a small segment of the route, using remote sensing images and data gathered during fieldwork. This assessment underlines the need for a well-thought-out strategy, which is required if sustainable integration of heritage conservation into the construction plan is to be realized. If such a balance is not found, thousands of archaeological monuments could disappear, which would result in a huge cultural and scientific loss. As a possible solution, an integrative strategy founded on a desk-based study of remote sensing images and a well-directed field survey is suggested

Influence of boric anhydride upon the physical and chemical properties of ferrosilicon slag

The authors study the influence of boric anhydride upon the physical and chemical properties of slag in the manufacture of ferrosilicon. It is established that adding boric anhydride to the slag changes its refractory quality and its viscosity and eases pouring slag and metal. Slags with optimal composition and properties are described

ПЕРИОД ВЫЗДОРОВЛЕНИЯ И ИСХОДЫ ДИФТЕРИИ У ВЗРОСЛЫХ (клинико-статистическое исследование)

In 1824 a man sick with diphtheria during an epidemic of this infection in the mid nineties of the last century complications registered at an average of 16,17%. When combined diphtheria complications were observed in 58,78%, with only the defeat of the pharynx – in 12,78%. Multiple organ lesions in diphtheria are protected from one year to seven years. We observed patients mortality was on average 2,24%. The lowest mortality was in diphtheria throat – 0,66%, with a combined form of the disease – 22,14%. It is advisable to revise the terms of active surveillance recover this infection. The leading cause of death in diphtheria was infection-toxic shock syndrome is often associated with infection – toxic myocarditis.У 1824 человек, больных дифтерией, во время эпидемии этой инфекции в середине девяностых годов прошлого века осложнения зарегистрированы в среднем у 16,17 %. При комбинированной дифтерии осложнения наблюдались в 58,78%, при поражении только зева – в 12,78%. Полиорганные поражения при дифтерии сохраняются от одного года до семи лет. У наблюдавшихся больных летальность составила в среднем 2,24%. Самой низкой летальность была при дифтерии зева – 0,66%, при комбинированной форме болезни – 22,14%. Целесообразно пересмотреть сроки активного наблюдения за переболевшими этой инфекцией. Ведущей причиной летального исхода при дифтерии явился инфекционно- токсический шок, часто сочетавшийся с инфекционно-токсическим миокардитом