New Evidence for Supernarrow Dibaryons Production in pd Interactions

The analysis of new experimental data, obtained at the Proton Linear Accelerator of INR, with the aim to search for supernarrow dibaryons in the $pd\to ppX_1$ and $pd\to pdX_2$ reactions is presented. Narrow peaks with an experimental width of 5 MeV at masses of 1904$\pm 2$, 1926$\pm 2$, and 1942$\pm 2$ MeV have been observed in missing mass $M_{pX_1}$ spectra. In the missing mass $M_{X_1}$ spectra, the peaks at $M_{X_1}=966\pm 2$, 986$\pm 2$, and 1003$\pm 2$ MeV have been found. The analysis of the data obtained leads to the conclusion that the observed peaks in $M_{pX_1}$ spectra are most likely supernarrow dibaryons, the decay of which into two nucleons is forbidden by the Pauli exclusion principle. An alternative interpretation of the spectra by assuming a decay of the supernarrow dibaryons in "exotic baryon states" with masses $M_{X_1}$ is discussed.Comment: 17 pages, 6 figures. Considerably expanded version accepted for publication in Eur. Phys. J. A; a discussion, 4 figures and several references have been added, the title has been change

Fishing for Narrow Dibaryons in pd->pX Reaction

An analysis of experimental data, obtained at the Linear Accelerator of INR, is carried out with the aim of searching for supernarrow dibaryons in the reactions pd->p+X and pd->p+pX_1. Dibaryons with masses 1904\pm 2, 1926\pm 2, and 1942\pm 2 MeV have been observed in M_{X} missing mass spectra. In M_{X_1} missing mass spectra, the peaks have been found at M_{X_1}=966\pm 2, 986\pm 2, and 1003\pm 2 MeV. These values of M_{X_1} coincide with the ones obtained by a simulation of a decay of the dibaryons into \gamma+pn. The analysis of the data obtained leads to the conclusion that the observed dibaryons are supernarrow dibaryons, the decay of which into two nucleons is forbidden by the Pauli exclusion principle. A possible interpretation of exited nucleon states with small masses is suggested.Comment: 4 pages, 2 figures, aipproc.sty (included); Proceedings of the VII Conference "Intersections Between Particle and Nuclear Physics", Quebec, Canada, May 23-27, 200

Description of organic compound vapor-phase sorption by geosorbents: Adequacy of the isotherm approximation

The approximation of isotherms of vapor-phase sorption of organic compounds (OC) is a long-standing problem. It is especially difficult to solve in case of natural heterogeneous sorbents (soils, sediments, aquifers, etc.) since these sorbents contain sites with different sorption activity. The aim of this work was the statistical evaluation of the adequacy of the approximation of isotherms of vapor-phase sorption of OC by geosorbents in water-unsaturated conditions by employing various fitting equations. Vapor sorption isotherms were measured by the static headspace gas-chromatographic analysis method for 27 various organic sorbates (13 hydrocarbons and 5 chlorinated hydrocarbons, 7 oxygenated and 2 nitrogenated OC) on geosorbents (6 soils typical for Middle Russia regions, separate soil layers of 2 dark-gray forest soils, natural zeolite-containing material and bentonite clay, and two clay-humic complexes). The computer-assisted special sorption database with the corresponding software was created, and on the whole, 103 experimental sorption isotherms (86 isotherms measured and 17 taken from the literature) were used for the approximation. The adequacy of isotherm approximation by different sorption models was compared: Brunauer-Emmett-Teller (BET), modified BET (MBET), Pickett-Dellyes (PD), Guggenheim-Anderson-De Boer (GAB), Aranovich-Donohue (AD), Hinz (HZ) and polynomial (PN) equation. For the comparison of the adequacy of isotherm approximation by different equations, the following three criteria were used: (a) s 5% - the average probability of the location of experimental sorption values within the range of 5% of the theoretical curve; (b) two interconnected parameters: R 2 - the square of correlation coefficient and k - the slope tangent for the linear regression (V E; V T) at various sorbate activities; (c) D̄ - relative sample variance as a characteristics of the optimal ratio between numbers of parameters of the fitting equation and its approximation quality. For the description of the vapor sorption of OC by geosorbents, the new MGAB equation (the modified GAB equation) was suggested. It is characterized by the optimal ratio between the 'complexity' of an equation (MGAB is a four-parametrical equation) and its approximation quality (MGAB shows one of the best isotherm approximations). The following rank of the decrease of the adequacy (upon D̄ criterion) of examined fitting equations in relation to the OC sorption isotherm approximation in the whole isotherm range was formed: MGAB > HZ > PD > GAB > AD > PN. © 2005 Elsevier B.V. All rights reserved

A Possibility of Detecting Fast Neutrons in a 10B Solid-gas Detector

The possibility of detecting thermal and fast neutrons in 10B solid-gas detector is considered. The simulation of the neutron detection process shows a significant difference in the detector signals caused by neutrons of different energies. An experimental verification of the detector’s operation was performed using W-Be photoneutron source with different ratio of fast and thermal neutrons incident on the detector. The measured amplitude spectra of the signals for different neutron energies were compared with the simulation results. The qualitative agreement between experimental and calculated data indicates the possibility of using this detector for recording thermal and fast neutrons

Narrative in the Novel «Apocrypha of Aglaia» (Analyse of Episode)

Article reviews the narrative structure of a single episode from the novel “Apocrypha of Aglaia”. The multi-level compositional structure that includes the “novel in the novel” complicates the narrative of the episode. Particular attention in the analysis is given to the characterization of the narrator, point of view and narrative modality. Narrator was defined as diegetic, and implementation his functions character Wojtek necessary to fulfil few plot and compositional functions. Specificities spatial and ideological point of view also were characterized. Two types of narrative modality were found in the episode – private opinion and comprehension – specific to various characters. The relationship between speech structure and narrative modality prevailing in the episode was noted. The plot structure of the episode is similar in structure to the fabulous (two worlds, passing the test and motive of food). Based on the analysis of the structure of the episode, a conclusion is made about the role of the episode in the novel.В статье рассматривается нарративное устройство одного эпизода романа «Апокриф Аглаи». Многоуровневая композиционная структура, включающая в себя «роман в романе», усложняет нарратив. Особое внимание уделено характеристике нарратора, точке зрения и нарративной модальности. Нарратор был определен как диегетический, а исполнение его функций персонажем Войтеком необходимо для выполнения нескольких сюжетных и композиционных функций. Охарактеризованы также особенности пространственной и идеологической точек зрения. В эпизоде обнаружены два вида нарративной модальности – частное мнение и постигание – присущие разным персонажам. Отмечена связь между речевым построением и нарративной модальностью, преобладающей в эпизоде. Сюжетное строение эпизода схоже по структуре со сказочным (двоемирие, прохождение испытания и мотив еды). На основе анализа структуры эпизода делается вывод о его роли в романе

The equation of vapor-phase sorption on heterogeneous surfaces with local Guggenheim-Anderson-De Boer model

Recently, we proposed a new four-parametric MGAB equation (modified Guggenheim-Anderson-De Boer equation, GAB) for fitting of experimental isotherms of vapor-phase sorption on geosorbents. In the present study, the theoretical meaning of MGAB equation was elucidated. For this purpose, the properties of the equation of multilayer adsorption on a heterogeneous surface with local characteristics described by GAB model and Zeldovitsh-Roginskiy energy distribution function ρ(ε) were derived and the satisfaction of MGAB equation with these properties was shown. MGAB model has two parameters connected with GAB model: vm is the monolayer sorption capacity and k is the constant of the multilayer sorption, as well as two parameters of sorption energy distribution function ρ(ε): α, characterizing heterogeneity of ρ(ε) and C0, reflecting energy baseline. The influence of parameters α and C0 on the shape of both ρ(ε) and model sorption isotherm was established. The applicability of MGAB model for the description of surface heterogeneity of a natural sorbent by example of 13 different sorbate-sorbent systems dried and moistened has been discussed. For these systems equilibrium sorption isotherms were measured, corresponding energy distribution functions ρ(ε) were calculated, and obtained α values were compared. On the whole, the differences in α values responded to the real tendencies of heterogeneity changes in these systems. © 2006 Elsevier B.V. All rights reserved

On the need for ORCID to promote modern biomedical research

Modern scientific communication is characterized by an appeal to digital technologies. In order to improve their scientometric indicators, researchers and institutions are required to use various tools to promote their work in the scientific community, especially identifiers. One of them is ORCID, which is highly appreciated by specialists engaged in scientific communication, including in the field of biomedicine. Thus, the researcher’s identifier, thanks to its capabilities (for example, integration with publishing platforms and scientometric databases), allows you to more accurately establish the metadata of materials, which reduces the risks of erroneous authorship. In addition, ORCID increases the coverage of the dissemination of research, which can positively affect the scientometric indicators of the scientist and the organization he represents. Currently, many Russian authors do not pay attention to the importance of their digital footprint, in particular ORCID, to promote their own works. The material presents some features of the researcher’s identifier, which are an important component of modern scientific communication, as well as instructions for registration in the ORCID system.Современная научная коммуникация характеризуется обращением к цифровым технологиям. Для того чтобы повысить свои наукометрические показатели, исследователи и институции обязаны использовать различные инструменты продвижения своих работ в научном сообществе, в особенности идентификаторы. Одним из них является ORCID, который высоко оценен специалистами, занимающимися научной коммуникацией, в т. ч. в области биомедицины. Так, идентификатор исследователя благодаря своим возможностям (например, интеграции с издательскими платформами и наукометрическими базами данных) позволяет точнее установить метаданные материалов, что уменьшает риски ошибочного авторства. Кроме того, ORCID увеличивает охват распространения исследований, что может положительно влиять на наукометрические показатели ученого и организации, которую он представляет. В настоящее время множество российских авторов не уделяет внимание важности своего цифрового следа, в частности ORCID, для продвижения собственных работ. В материале представлены некоторые возможности идентификатора исследователя, которые являются важной составляющей современной научной коммуникации, а также алгоритм регистрации в системе ORCID

Speckle tracking dobutamine stress echocardiography diagnostic accuracy in primary coronary arteries disease diagnosi

The aim of the work was to evaluate STE feasibility as DSE visualization method and its accuracy compared to coronary angiography (CAG) in the patients with moderate-tohigh coronary arteries disease (CAD) risk. Materials and methods: We prospectively examined 140 pts (84 (60.0%) men) with suspected CAD in order to verify diagnosis and evaluate myocardial viability and coronary reserve. Results: Mean LV EF was 54.4±15.8%. All pts had normal BP and HR during the test. There were no significant hemodynamics alterations during the test. There were no significant complications during DSE – 15 (12.9%) cases of different relatively low-grade supraventricular and ventricular arrhythmia, mainly transitory without interventions. There were 116 (82.9%) positive DSE results, of which 2 (1.72%) were false-positive. In 2 (8.3%) pts with negative DSE results CAG revealed 1-vessel insignificant (50 – 70%) lesions with developed collaterals (false-negative results). According to DSE and CAG results, 96 (82.3%) pts underwent revascularization interventions – 86 (89.6%) PCI’s and (10.4%) CABG surgeries. Sensitivity and specificity of DSE with STE for primary CAD diagnosis according to “golden standard” CAG results were 98.3% and 91.7%, respectively, with identical positive and negative predictive value and very high method overall accuracy (AUC = 0.98) and OR = 627.0 (p<0.0001). Sensitivity and specificity of DSE with STE for defining indications for intervention and revascularization were 97.9% and 91.7%, respectively, with high overall accuracy (AUC = 0.95; OR = 564.0, p<0.0001). Combined quantification of ΔGLS and ΔWMSI for primary CAD diagnosis showed significantly lower sensitivity 86.2% (р=0.0002) and specificity 80.4% (р=0.0064) with significantly lower integral method accuracy (AUC 0.83, р<0.0001). Conclusions: DSE with STE as a visualization method is a safe and optimal method for ischemia diagnosis and myocardial viability and coronary reserve evaluation in the pts with CAD suspicion. Given the lower ΔGLS and ΔWMSI accuracy compared to integral DSE with STE result evaluation, as well as frequent GLS growth in significant amount of patients with definite positive test result, authors recommend evaluating integral test result rather than strain value

Description of organic compound vapor-phase sorption by geosorbents: Adequacy of the isotherm approximation

The approximation of isotherms of vapor-phase sorption of organic compounds (OC) is a long-standing problem. It is especially difficult to solve in case of natural heterogeneous sorbents (soils, sediments, aquifers, etc.) since these sorbents contain sites with different sorption activity. The aim of this work was the statistical evaluation of the adequacy of the approximation of isotherms of vapor-phase sorption of OC by geosorbents in water-unsaturated conditions by employing various fitting equations. Vapor sorption isotherms were measured by the static headspace gas-chromatographic analysis method for 27 various organic sorbates (13 hydrocarbons and 5 chlorinated hydrocarbons, 7 oxygenated and 2 nitrogenated OC) on geosorbents (6 soils typical for Middle Russia regions, separate soil layers of 2 dark-gray forest soils, natural zeolite-containing material and bentonite clay, and two clay-humic complexes). The computer-assisted special sorption database with the corresponding software was created, and on the whole, 103 experimental sorption isotherms (86 isotherms measured and 17 taken from the literature) were used for the approximation. The adequacy of isotherm approximation by different sorption models was compared: Brunauer-Emmett-Teller (BET), modified BET (MBET), Pickett-Dellyes (PD), Guggenheim-Anderson-De Boer (GAB), Aranovich-Donohue (AD), Hinz (HZ) and polynomial (PN) equation. For the comparison of the adequacy of isotherm approximation by different equations, the following three criteria were used: (a) s 5% - the average probability of the location of experimental sorption values within the range of 5% of the theoretical curve; (b) two interconnected parameters: R 2 - the square of correlation coefficient and k - the slope tangent for the linear regression (V E; V T) at various sorbate activities; (c) D̄ - relative sample variance as a characteristics of the optimal ratio between numbers of parameters of the fitting equation and its approximation quality. For the description of the vapor sorption of OC by geosorbents, the new MGAB equation (the modified GAB equation) was suggested. It is characterized by the optimal ratio between the 'complexity' of an equation (MGAB is a four-parametrical equation) and its approximation quality (MGAB shows one of the best isotherm approximations). The following rank of the decrease of the adequacy (upon D̄ criterion) of examined fitting equations in relation to the OC sorption isotherm approximation in the whole isotherm range was formed: MGAB > HZ > PD > GAB > AD > PN. © 2005 Elsevier B.V. All rights reserved

Description of organic compound vapor-phase sorption by geosorbents: Adequacy of the isotherm approximation

The approximation of isotherms of vapor-phase sorption of organic compounds (OC) is a long-standing problem. It is especially difficult to solve in case of natural heterogeneous sorbents (soils, sediments, aquifers, etc.) since these sorbents contain sites with different sorption activity. The aim of this work was the statistical evaluation of the adequacy of the approximation of isotherms of vapor-phase sorption of OC by geosorbents in water-unsaturated conditions by employing various fitting equations. Vapor sorption isotherms were measured by the static headspace gas-chromatographic analysis method for 27 various organic sorbates (13 hydrocarbons and 5 chlorinated hydrocarbons, 7 oxygenated and 2 nitrogenated OC) on geosorbents (6 soils typical for Middle Russia regions, separate soil layers of 2 dark-gray forest soils, natural zeolite-containing material and bentonite clay, and two clay-humic complexes). The computer-assisted special sorption database with the corresponding software was created, and on the whole, 103 experimental sorption isotherms (86 isotherms measured and 17 taken from the literature) were used for the approximation. The adequacy of isotherm approximation by different sorption models was compared: Brunauer-Emmett-Teller (BET), modified BET (MBET), Pickett-Dellyes (PD), Guggenheim-Anderson-De Boer (GAB), Aranovich-Donohue (AD), Hinz (HZ) and polynomial (PN) equation. For the comparison of the adequacy of isotherm approximation by different equations, the following three criteria were used: (a) s 5% - the average probability of the location of experimental sorption values within the range of 5% of the theoretical curve; (b) two interconnected parameters: R 2 - the square of correlation coefficient and k - the slope tangent for the linear regression (V E; V T) at various sorbate activities; (c) D̄ - relative sample variance as a characteristics of the optimal ratio between numbers of parameters of the fitting equation and its approximation quality. For the description of the vapor sorption of OC by geosorbents, the new MGAB equation (the modified GAB equation) was suggested. It is characterized by the optimal ratio between the 'complexity' of an equation (MGAB is a four-parametrical equation) and its approximation quality (MGAB shows one of the best isotherm approximations). The following rank of the decrease of the adequacy (upon D̄ criterion) of examined fitting equations in relation to the OC sorption isotherm approximation in the whole isotherm range was formed: MGAB > HZ > PD > GAB > AD > PN. © 2005 Elsevier B.V. All rights reserved