bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of a control system for a ballast cleaning machine using GNSS
Authors: Shcherbakov Vladimir , Buntsev Ivan , Kovaleva Olga
Published: December 2019

Monitoring the geometric parameters of cutting and cleaning ballast during reconstruction and overhaul works is one of the most important tasks of ensuring high quality repair work. The paper describes a new type of automated control system to control the cutting process and the cleaning of ballast performed at major overhaul and reconstruction. This automated control system uses the data of a multisystem GNSS receiver, base Reference stations and spring-return mechanisms for installing antennas on the working body of the track machine (bar chain). Nowadays, gravel-cleaning machines have installed standard work quality control systems (depth of ballast cut and lateral slope), and other measuring control tools are also used. The disadvantages of existing technologies and instrumental testing are considered. The modern automatic control systems of various types developed by SGUPS and based on the use of global navigation systems are presented. Detailed schemes of working elements of ACS installed on the ballast cleaning machine (BCM) are presented. Algorithms to determine the depth and cross slope of the ballast cutting and control of these values are considered. The use and effectiveness of this type of ACS providing the required accuracy of work and continuous monitoring of the main quantities are substantiated.
Economic security management of the transportation process in the formation of competitive advantages of rail transport
Authors: Shkurina Lidia , Maskaeva Eugenia , Maskaev Stanislav
Published: December 2019

The authors reviewed the resource support of the transportation process security from the point of view of a promising direction as competitiveness and increase the sustainability of rail transport, accidents and events, their number and the damage suffered as well as transport analysis from the point of view of economic management security.
Construction building systems protection under emergency exposure
Authors: Merkulov Sergey , Polyakova Natalya , Rimshin Vladimir , Kuzina Ekaterina , Neverov Alexey
Published: December 2019

The structural reliability of the building ensures the building safety as a whole and the safety of the population, therefore the issue of ensuring reliability arises primarily in the design process. Buildings must be protected from destruction during all types of force, as well as in the case of load-bearing structures destruction as a result of emergency. Emergency impact on an object is an unregulated impact that is created as a result of an object getting into a special situation and can lead to its accident. The causes of structures progressive collapse are considered in this article. The main methods and methods of protecting buildings from progressive destruction are given. The calculation analysis of the monolithic reinforced concrete building frame for progressive collapse according to the method of possible damage is performed. There are many calculated and constructive proposals for solving the problems of counteracting the progressive destruction that can be divided into three categories: secondary protection measures, indirect design and direct design. In this article the resulting reinforcement of structural elements is determined taking into account the structural requirements for the continuity of longitudinal reinforcement, the minimum percentage of reinforcement. They are determined in the necessary places of additional reinforcement depending on the accepted permanent (background) reinforcement of the floors.
Advanced evaluation of simultaneous train formation methods based on fuzzy compromise programing
Authors: Belošević Ivan , Milinković Sanjin , Ivić Miloš , Marton Peter
Published: December 2019

Multi-group trains have potential to take a substantial segment in realizing wagonload services. Multi-group train formation is a complex marshalling procedure which composes a train by sorting wagons according to their destinations. The order of wagons corresponds to the disposition of destinations on the train route. The determination of rational sorting schedules should be based on a comprehensive approach addressing different quantitative and qualitative indicators which are conflicting and uncertain. In order to address these conditions, we proposed a new approach for fuzzy multi-criteria evaluation of simultaneous train formation methods. In this paper we evaluate simultaneous train formation methods and provide recommendations for the rational application of elementary, triangular and geometric sorting schedules regarding different scales of sorting task complexity.
Simulation model of situational control of transshipment machinery fleet
Authors: Zub Igor , Ezhov Yuriy , Shchemelev Viktor
Published: December 2019

The seaport is a place for cargo transshipment and storage. The speed of vehicle processing is one of the indicators of port’s performance. The time of vehicles being under processing depends on the performance of a fleet of transshipment machinery. The stochastic nature of vehicles’ arriving leads to the intense operation of handling facilities and formation of wait lists for vehicles to be loaded or unloaded, or to the downtime of transshipment machinery when vehicles are absent. Depending on the operational situation, transshipment machinery is brought out for maintenance operations that can be performed by unit, which provides the increase in the technical use coefficient. For maintenance of individual units, the decomposition of handling facility is performed; statistical data on the time of maintenance conduction for all units is collected. Statistical data are entered into the database. When transshipment machinery is brought out of operation for a short period, the unit is selected, the service time of which coincides with the downtime of a brought out facility. To visualize the process of situational management of maintenance and define conflict situations, a simulation model was developed with the use of the apparatus of Petri nets. The analysis of the model helped to reveal conflict situations that can be solved both during situational management of transshipment machinery fleet and by means of models nested into conflict places.
Nano concrete aggregation with steel fibers: A problem to enhance the tensile strength of concrete
Authors: Ngo Van Thuc , Khai Lam Thanh Quang , Dung Do Thi My , Nguyen Trong Chuc
Published: December 2019

In Vietnam, nano technology began to be interested in research and development, typically the seminar program of production research, silicon nano applications from waste materials and investment projects to build silicon nano manufacturing in Ho Chi Minh City. Researching the properties and applications of nano concrete in Vietnam with the desire to apply to some types of bridge and road structures today and step by step research on nano concrete application in designing some structure of bridges, roads, and other special works. With new materials used to determine the mechanical properties of materials and the characteristics of destruction at the limit of failure is essential. Moreover, high strength concrete materials are often brittle, so it is necessary to study measures to increase the plasticity to obtain the structure to ensure the requirements of the bearing and nano concrete with steel fibers. Steel fibers will make nano concrete increase tensile resistance in concrete.
A method for displaying a graphical system design
Authors: Fakhratov Mukhammet , Sinenko Sergey , Sharif Akbari Mohammad
Published: December 2019

The methods of displaying the design system are considered. The interpretation of the design model of buildings and structures is given. Designing is usually considered as a set of operations performed by the designer when creating a project and functions in other areas. The design process is an adequate representation of the project for the construction of an object in all conditions. It is described by design routes, design operations algorithms, including tools for evaluating custom indicators, methods for determining design resources. This is an informational labour process. Among the many characteristics of design systems, the structure occupies a special position. The structure is the most general and most stable characteristic of the system, invariant with respect to the specific execution of elements and state. The structure reflects the general, essential and stable properties of the system. Many structural elements that perform one elementary action form an organizational module. An organizational module is an organizational system module. The introduced concepts allow us to define organizational management as a process of redistributing modules of an organizational system by technological and information modules.
Formation of the resource saving process in commercial property buildings during the introduction of “green” standards in Russia
Authors: Gurko Anna
Published: December 2019

The article is dedicated to one of the most essential areas in the construction industry: consideration of the issues related to resource saving, ecologically and economically rational use of natural resources in accordance with “green standards” of the commercial property buildings, offices, in particular. During the operation of office buildings there takes place negative impact on all the components of the environment. Herewith, the first issues considered by the operating organizations are the cost of the facility, safety of technological processes, reliability, durability and operational characteristics, and only then the issues of building environmental friendliness and energy efficiency, the consequences of which are irrational use of natural resources and accumulation of environmental damage. The number of existing systems certifying “green” buildings is insufficient to create a stable human environment. Formation of the resource saving mechanism during the operation of office buildings requires the application of the “green” standards criteria, making it possible to provide results of the stable approaches during the entire operational lifetime of the building. Based on the local and foreign experience in resource saving stimulation under the “green standards” the article provides the estimation criteria making it possible to implement the ecological and economic evaluation of the resource saving mechanism during the operation of office buildings.
Application of three-dimensional technologies in restoration of architectural decor elements
Authors: Norin Veniamin , Golovina Svetlana , Tikhonov Yurii
Published: December 2019

The article deals with issues of applying modern innovative three-dimensional techniques in production and restoration of facade decor elements. Methodology for producing an exact physical copy of a part under restoration is set forth as exemplified by the architectural rosette. It details a methodology of how to conduct virtual digital restoration of a rosette using one of the best software solutions for digital molding, Zbrush, which is a superb tool to create high-definition three-dimensional objects. Two methods of digital restoration are treated: copying and sculpting. The copying method produces the geometric shape of an article consisting of items with identical dimensions. Sculpting is performed using digital molding, i.e. working with digital clay – a more intuitive modeling method compared to traditional techniques. Possible methods of production of the restored physical copy of a damaged rosette, their merits, and demerits are described. The study provides a forecast for development of architectural monument restoration with the use of three-dimensional techniques.
Organization of technological approach to the design of engineering systems using BIM-technologies
Authors: Subbotin Artem , Melkumyan Andrey , Khuriev Vladimir
Published: December 2019

The interest of engineers in computer technology as a means of facilitating their professional tasks, appeared in the last century. In this regard, by the early 60-ies of the twentieth century, a sufficient mathematical basis for writing specialized engineering programs was formed. In the following years, the active development of various software designed for two-dimensional and three-dimensional modeling began, and in the 80 - ies the first buildings appeared, the design of which was carried out with their use. Engineering systems are a set of technical solutions that ensure the normal functioning of consumers. Modern buildings, regardless of the purpose, are densely filled with engineering networks, as they are necessary for a comfortable stay of people in the room. The abbreviation “ BIM “-Building Information Modeling translates as “ building information modeling” Building information modeling is an approach to object life cycle management, which involves automated collection and complex processing in the design process of all architectural, design, technological, economic and other information about the building with all its relationships and dependencies, when the building and everything related to it are considered as a single object.
Renovation of historical area of the city park
Authors: Polyakova Olga
Published: December 2019

Renovation and improvement of historical area of the Victory Park of the city of Tolyatti, the Samara Region, Russia, are of prime importance in the process of development of cultural environment, since they are aimed at commemorating veterans of the Second World War and its Eastern Front (1941-1945) and the promotion of patriotism among young people. This will also attract domestic and international tourists, which will contribute to the tourism intensification. Architectural and design developments and their implementation correspond the strategies of social and economic development of the city and the region until 2030, they are supported by the Fund of social and cultural development of Tolyatti “Dukhovnoye naslediye” (“Spiritual heritage”) and by the city administration. Within the process of design work, the key solutions on landscape renovation, improvement of recreation areas of the park and creation of the platform for related public events were worked out and represented in this paper. Designers elaborated several solutions on a memorial that have specific structural features and include a monument to a female soldier, a homefront worker who was waiting for her husband and bringing up children during hard wartime.
Aqua-architecture as an autonomous system: metabolic components of the complete ecological cycle
Authors: Kizilova Svetlana
Published: December 2019

The article is devoted to the analysis ofaqua-architecture’skey components, providing autonomous functioning of a floating structure as an artificial full-cycle ecosystem. The leading approach to the study is a systematic analysis of the stages maintaining the complete ecological cycle: production of primary products, energy storage, waste management and operation control. The analysis of each stage is accompanied by the examples of built and conceptual projects of architectural structures on the water from the world’s architectural practice. The research shows that it is necessary to include the production systems based on the usage of water resources at every stage. At the stage of primary products and water obtainment, it is advisable to provide aeroponic, aquaponic, hydroponic farms and water desalination plants. To obtain energy in the autonomous structure, it is necessary to organize floating solar farms, underwater hydropower and wind turbines. The disposal stage involves the installation of biogas facilities, hydro-botanical ponds and waste recycling systems. The fourth component of the full ecological cycle is smart management, the automation of which allows the whole system to function independently at any stage. Water resources can also be involved in transport and logistics processes as well as in microclimate maintenance. The materials of this study will be useful for further theoretical and practical developments in the field of eco-sustainable design in the extreme environments.
Influence degree of constrained conditions on overhaul of apartment buildings
Authors: Fatullaev Rustam
Published: December 2019

When carrying out the repair and construction work in the apartment buildings and when creating an organizational and technological model, it is necessary to take into account and analyze all the parameters that influence on these works to optimize the time and financial costs. The complicating conditions of the construction works can be caused by the repair work, which are made without the relocation of the residents, the existence of the high-voltage networks, the presence of the constrained conditions, the material storage and etc. In order to give an objective assessment of the organizational and technological model of the repair and construction works, this article proposes to introduce a complex indicator of the constrained condition influence, which quantitatively reflects the influence degree of the set constraint parameter. This model gives a quantitative assessment of the influence degree of the constraint parameters and allows selecting the most effective organizational and technological model for the repair and construction works.
Perception of future professionals of the construction industry of green building and architecture practices
Authors: Leontev Mikhail
Published: December 2019

Green building as a new concept is gaining more and more value, acts as an important mitigating measure against the negative side effects of economic activity in cities. The implementation of the ideas and practices of sustainable development in the construction industry has led to the emergence of a new direction – benvironmental (“green”) construction, which provides a much higher level of quality of facilities for constructed object. A study was carried out of the problems and prospects of green construction and architecture in cities. In this paper, the concept of green building and architecture is refined. The perception of green building and architecture practices by future construction industry professionals, the advantages and benefits of green building and architecture was investigated, factors that impede the implementation of green building in practice were identified. Currently, green building is little practiced for objective reasons. The practice of green building is hindered by a number of factors, for example, an unfavorable external environment in the form of policy or legislation, the economic situation in the country, negative market expectations, and lack of awareness. Health and increased productivity have been identified as the most important benefits of green building, followed by a reduction in the cost of construction and individual operations, and the conservation of natural resources. The recommendations addressed to non-governmental organizations, government bodies, professional communities are formulated.
Ecological and energy efficiency of insulating systems
Authors: Zhukov Aleksey , Medvedev Andrey , Poserenin , Alexey , Efimov Boris
Published: December 2019

The article, on the example of pipeline insulation systems, outlines the fundamentals of the concept of environmentally sustainable construction, including requirements for materials, constructional systems in which these materials are used, engineering systems and work technologies. Insulation based on polyethylene foam technology of its installation meets the requirements of EcoMaterial Basis or EcoMaterial Green. Polyethylene is absolutely safe for humans and its base is polyethylene, which used in the food industry (packaging or boxing) and in medicine (prosthetics). A specific feature of polyethylene foam, like most types of foamed (gas-filled) plastic materials, is combustibility, expressed depending on the consumption and effectiveness of flame retardants, to one degree or another. During operation in the temperature range from -60 to +90 °C, the properties of materials are stable and no harmful emissions occur. The installation of the insulating sheath fixed by an glue method and is not associated with processes that are dangerous for humans and harmful to the environment. The article presents the main provisions of methods for calculating insulation systems based on polyethylene by measure of energy efficiency, which is defining, including the environmental assessment of insulation systems. The optimum thickness of polyethylene foam has been determined, as well as the recommended insulation thicknesses to ensure a given (safe for humans) temperature; to prevent moisture condensation on the surface of the insulating layer. An calculated time has been established during which thermal insulation prevents cold water from freezing when at an emergency stop of its movement in pipelines in the winter.
Archeological tourism as a segment of cruise tourism offer on the example of Roman mosaics sites in Risan in the Bay of Kotor
Authors: Radovic Goran , Konjevic Nikola
Published: December 2019

Cruise tourism, most often, is related to the landing of a ship in one or more ports, i.e. tourist destinations, in which passengers and crew go ashore. In the richness of the offer that a port in the Adriatic and the Mediterranean offers to cruise tourists is certainly the part that can be called: culture, tradition, monuments, by which the areas on the map of world cruises are recognized. The port of Kotor, which is the main port for the reception of cruise ships in Montenegro, has for years achieved significant results in the reception and dispatch of cruise ships. Thus, through the port of Kotor, during 2018, 412 ships carrying 492, 475 passengers visited Montenegro. The paper, through the example of the Roman Mosaic site in Risan in the Bay of Boka Kotorska, analyses the effects of organized visits by tourists from cruise ships arriving to Kotor, and the importance and value of archeological sites in tourist cruising offer and the interaction between business and culture. The archeological site in Risan with the remains of the Roman Villa Urbana with preserved floor mosaics from the 2nd century represents a significant and attractive segment in the offer and development of archeological tourism as a subset of cultural tourism.
Provision of value innovation when creating tourism clusters based on the concept of sustainable construction
Authors: Orlov Alexandr
Published: December 2019

This article deals with the analysis of prospects and problems of tourism development in Russia. To ensure the accelerated growth of the tourism industry, it is necessary to pay special attention to the development of the infrastructure of tourist territories based on the concept of sustainable construction. In addition to the concept of sustainable construction that takes into account environmental, social and economic factors of investment and construction projects implementation, it is also proposed to use the cluster approach for the development of tourist territories. Being an example of an investment and construction megaproject, the tourism cluster has a number of specific features, such as complex management, risks of exceeding the estimated cost and failure to meet the deadlines for the implementation, which shall also be taken into account when developing the concept of tourism clusters. The article proposes an algorithm for developing the concept of a tourism cluster that provides for value innovation. Value innovation is an important element in ensuring the competitiveness of the tourism cluster and is closely linked to technical innovations in construction. The proposed algorithm takes into account domestic and foreign experience in the field of sustainable construction, existing certification systems for green, sustainable buildings, as well as the life cycle cost (LCC) estimate. The article also provides and analyzes groups of factors of tourist factors competitiveness and on their basis the strategy canvas was created for projects that are being implemented, for projects that have been implemented and for projects that can be implemented on the basis of the concept of sustainable construction. LCCs before and after the introduction of innovative technical solutions were simulated for individual facilities of Baikal tourism and recreation cluster in Russia.
Legal regulation of subsoil use when placing and constructing facilities for development of subsoil sites
Authors: Voskresenskaya Elena , Zhilskiy Nikolay , Golovanov Nicolay
Published: December 2019

Energy Strategy of Russia for the period until 2035 contains a note that Russian Energy Industry is one of the main sources of environmental pollution. More than 50 per cent of polluted matter emissions into the atmosphere, more than 20 per cent of dirty discharge into surface water reservoirs and more than 70 per cent of total emissions of greenhouse gases account for this industry. Issues of environmental safety of the subsoil use are always under consideration in the academic community. However, huge amount of problems concerning this area still remain unresolved. For instance, bankrupt subsoil users often do not satisfy requirements set by the government on mothballing or removing facilities aimed at development or reclamation of used land parcels when the land leasehold is over. This indicates the need to enshrine additional measures in the Russian legislation on ensuring compliance with certain requirements. The authors mention that providing the regeneration of raw material base and its reasonable using for the benefit of current and next generations of nations inhabiting the Russian Federation are among the primary tasks of governmental regulation of relations on the subsoil use. The government should ensure the most efficient and consistent usage of resources obtained from already provided land parcels, complete development of mineral deposits and compliance with appropriate terms of subsoil use.
Assessment of the impact of the duration of construction on the effectiveness of the investment project
Authors: Mikhaylova Elena
Published: December 2019

The article discusses the relevance and necessity of assessing the impact of the duration of construction on the economic efficiency of investments. Using a mathematical expression, the profit received by the investor during the life cycle of the direct investment process is described. The peculiarity of investment projects involving the creation of capital investment (real estate), is the period of time during which profit is impossible. This period of time is equal to the duration of construction, including installation of technological equipment and commissioning. An analytical description of the degree of influence of the duration of construction on the indicators of economic efficiency of the investment project (profitability and profitability of property) is proposed. On the basis of the learned expressions, a numerical experiment was performed and graphs were constructed. The results of the research prove the possibility of analytical description of the degree of influence of the duration of construction on the quantitative indicators describing the investment project (profitability (Bank interest), profitability of the created property). It seems that the described approach allows to carry out forecasts which reliability surpasses the results obtained, for example, by means of expert estimations. The proposed mathematical apparatus is much simpler than the methods of probability theory and fuzzy set theory.
RES development trends that determine the sustainable development of the energy system of the future
Authors: Meshcheryakova Tatiana , Pigurin Andrey
Published: December 2019

To ensure reliable energy supply, it is necessary to solve a number of basic tasks: flexibility of energy systems, uninterrupted supply of energy, its availability to end consumers, resource efficiency and environmental safety. Sustainable development of the energy system involves changes along the entire energy conversion - chain from fuel and renewable generation and transmission of energy to optimizing its consumption. Many countries prioritize the development of renewable energy as the basis for low-carbon economic growth. Renewable energy sources contribute to the development of popular technologies not only in the field of sun and wind, but also in energy storage, hydrogen cycle, electric transport and e-mobility, energy efficiency of buildings, in the field of “smart” technologies, which ultimately affects improving the quality of life of people.
Freedom of will and its limitations: comparative study of legal norms in Russia and the USA
Authors: Borshcheniuk Vera , Semerianova Nina , Filatova Uliana , Karpovich Oleg
Published: December 2019

The relevance of the study is determined by the dynamics of development of inheritance law, both in general and its individual institutions, in particular, the institution of inheritance by will. Due to changes in Russian legislation, it is advisable to conduct a comparative legal analysis of the provisions on free will and the limits of its restriction to Russia and the United States. This will make it possible to determine the potential of the institution under study, used by various legal systems, to indicate direction of its further development in Russia. The leading research approach includes such scientific methods as dialectics, analysis, synthesis, deduction, comparative legal and formal legal method. Conclusions: The scientific approaches to understanding and restraining free will provided by US law differ significantly from their understanding by Russian law, which belongs to the Romano-German legal family. The right to choose the option of accepting the inheritance and the rules on the mandatory share, enshrined in Russian law, testify to the development of inheritance law towards a balance of interests of participants in inheritance relations by establishing new limits for implementation of the testator’s will.
Application of knowledge management on project management in construction
Authors: Fedosina Anastasia
Published: December 2019

The modern Russian labor market dictates new requirements for the qualifications of project management managers in the investment and construction sector. The leading job and staff search site, HeadHunter, requires to have a Project Management Institute certificate in every third qualification condition. Foreign standards are actively supplanting “domestic rules of the game”. The relevance of this study is contained in the answer to the question: is the body of knowledge on project management applicable to the modern construction industry or is it just “a fashion trend” of senior management who wants to have the “Project Management Professional” certificate that is in demand abroad? This paper contains an analysis of significant and “linear” investment and construction projects for the Russian Federation on the structural assessment of key indicators: time, content, and money. This triad of constraints is reflected in the project management body of knowledge as being most susceptible to change during the project life cycle. The main idea of the analysis is to look at and evaluate the deviation of the values contained in the design and estimation documentation at the “input”, i.e. at the pre-investment stage, and at the “output”, i.e. at the stage of putting the object into operation.
State of current data storage market and development of tools for increasing data storage systems reliability
Authors: Bolsunovskaya Marina , Shirokova Svetlana , Loginova Aleksandra
Published: December 2019

This paper is devoted to the problem of developing and application of data storage systems (DSS) and tools for managing such systems to predict failures and provide fault tolerance specifications. Nowadays DSS are widely used for collecting data in Smart Home and Smart Cites management systems. For example, large data warehouses are utilized in traffic management systems. The results of the current data storage market state analysis are shown, and the project the purpose of which is to develop a hardware and software complex to predict failures in the storage system is presented.
Challenging nuclear structure of the heaviest – opportunities at S3
Authors: Ackermann Dieter
Published: December 2019

After more than half a century of research addressing the synthesis and nuclear structure of superheavy nuclei (SHN) a boost for its progress is expected from the advent of new instrumentation. An order of magnitude in beam intensity increase is envisaged to be provided by new powerful accelerators like the new DC280 cyclotron at the SHE factory of FLNR/JINR or the superconducting linac at SPIRAL2 of GANIL. In addition new ion-optical installations like the separator-spectrometer set-up S3 with two complementary detection systems SIRIUS and LEB will provide a substantial sensitivity increase for classically pursued routes like decay spectroscopy after separation (DSAS), and alternative and complementary methods like high precision mass measurements and laser spectroscopy. Decay spectroscopy has proven in the past to be a powerful tool to study the low lying nuclear structure of heavy and superheavy nuclei. Single particle levels and other structure features likeK isomerism, being important in the fermium-nobelium region as well as for tracing deformation towards spherical shell stabilised SHN, have been investigated almost up to the limit posed by the sensitivity of present-day instrumentation. Precision mass measurements and laser spectroscopy will offer the possibility to study alternative features like atomic and nuclear binding energies, nuclear charge radii and quadrupolemoments.
Discovery of collective states in 208Pb by complete spectroscopy
Authors: Heusler Andreas
Published: December 2019

Most neutron and proton bound states in 208Pb are described in the shell model as one-particle onehole configurations. Besides precise data obtained with the Q3D magnetic spectrograph of the MLL (Garching, Germany) an important reaction is the inelastic proton scattering via isobaric analog resonances in 209Bi. It yields amplitudes of neutron one-particle one-hole configurations with relative signs in each stateof 208Pb. The orthogonality, normality, and sum rule relations allow to investigate the completeness of the transformation matrices of one-particle one-hole configurations describing the states in 208Pb with spins from 0− to 14− and 0+ to 12+. By this method amplitudes of unobservable one-particle one-hole configurations can be determined.The comparison of spin, parity, and dominant particle-hole components thus derived in up to 30 states of a certain spin to shell model calculations allows to identify states described as collective excitations of the entire nucleus.
Application of the THM to the investigation of reactions induced by unstable nuclei: the18F(p,α)15O case
Authors: La Cognata Marco , Pizzone Rosario G. , José Jordi , Hernanz Margarita , Cherubini Silvio , Gulino Marisa , Rapisarda Giuseppe G. , Spitaleri Claudio
Published: December 2019

The Trojan Horse Method is applied to the investigation of the18F(p,α)15O reaction, by extracting the quasi free contribution to the2H(18F,α15O)nprocess. For the first time the method is applied to a reaction of astrophysical importance involving a radioactive nucleus. After investigating the reaction mechanism populating the a +15O + n exit channel, we could extract the18F(p,α)15O cross section and calculate the astrophysical factor over the 0 – 1 MeV energy interval. The possibility of exploring the cross section with no need of extrapolation allowed us to to point out the possible occurrence of a 7/2+state at 126 keV, which would strongly influence the trend of the astrophysical factor at the energies of astrophysical interest. However, the low energy resolution prevents us to draw definite conclusions. Possible astrophysical consequences are also discussed, motivating further work on this reaction.
Revealing microscopic origins of shape coexistence in the Ni isotopic chain
Authors: Leoni Silvia , Fornal Bogdan , Marginean Nicolae , Sferrazza Michele , Tsunod Yusuke , Otsuka Takaharu
Published: December 2019

In a two–neutron transfer experiment, performed in Bucharest in July 2016 at sub–Coulomb barrier energy,a photon decay hindered – solely – by a nuclear shape change was identified in the 66Ni nucleus. Such a rare process, at spin zero, was clearly observed before only in actinide nuclei in the 1970’s,where fission isomers were found. The experimental findings on 66Ni have been well reproduced by the Monte Carlo Shell Model Calculations of the Tokyo group, which predict a multifaceted scenario of coexistence of spherical, oblate and prolate shapes in neutron–rich Ni isotopes. The results on 66Ni encouraged a comprehensive gamma–spectroscopy investigation of neutron–rich Ni isotopes, in particular 62Ni and 64–Ni, at IFIN–HH (Bucharest), IPN Orsay and ILL (Grenoble), employing different reaction mechanisms to pin down the wave function composition of selected excited states. The aim is to shed light on the microscopic origin of deformation in neutron–rich Ni nuclei, possibly locating other examples of “shape–isomer–like” structures inthis region.
Analysis of excited states in 13C and their cluster structure
Authors: Lombardo Ivano
Published: December 2019

An accurate understanding of the spectroscopy of 13C is key to understand clustering phenomena in light nuclear systems. In this nucleus, many theoretical models predict the existence of α-cluster configurations, stabilized by the presence of an extra neutron. Despite of its importance, the spectroscopy of13C is still affected by ambiguities, demanding for new data against which benchmarking the models. We improve the knowledge on the 13C level scheme by means of a comprehensive R-matrix analysis of several experimental data sets. Our new spectroscopic information contributes to solve existing ambiguities in 13C structure and will serve a valid benchmark for theoretical models attempting to describe clustering in neutron rich systems.
Study of High-Energy Fission in Inverse Kinematics
Authors: Mantovani G. , Ramos D. , Caamaño M. , Lemasson A. , Rejmund M. , Audoin L. , Álvarez Pol H. , Frankland J. , Fernández-Domínguez B. , Galiana-Baldó E. , Piot J. , Gramegna F. , Marchi T. , Cicerchia M. , Ackermann D. , Biswas S. , Clement E. , Durand D. , Farget F. , Fregeau M.O. , Galaviz D. , Heinz A. , Henriques A.I. , Jacquot B. , Jurado B. , Kim Y. , Morfouace P. , Ralet D. , Roger T. , Schmitt C. , Teubig P. , Tsekhanovich I.
Published: December 2019

Fission at low excitation energy, is a process in which both macroscopic and microscopic aspects are involved. Some features in the total kinetic energy and in the N/Z distributions of the fragments, commonly associated with shell effects, came out in a series of recent experiments with high excitation energy fusionfission reactions in inverse kinematics. In the latest experiment of this campaign, a study of high-energy fission and quasi-fission between a 238U beam and a series of light targets was carried out by using the aforementioned technique, in order to probe the role of the shell structure in these processes.
Alpha correlations in terms of the hyper-Pfaffian
Authors: Mizusaki Takahiro , Schuck Peter
Published: December 2019

We find that the overlap between alpha-like four-body condensation wave function and m-scheme basis state can be represented by the hyper-Pfaffian, which is a natural extension of the Pfaffian for thepair-condensation wave function. This overlap is useful for nuclear structure calculations with the variational Monte Carlo method. As the hyper-Pfaffian has, however, only a few mathematical relations, it is quite difficult to use for numerical computations. We also find that a specific case of hyper-Pfaffian can be expressed by the sum of standard Pfaffians.
Hidden symmetries in the HFB norm overlap functions
Authors: Oi Makito , Mizusaki Takahiro , Shimizu Noritaka , Sun Yang
Published: December 2019

A brief consideration about hidden symmetries in the HFB norm overlap functions is presented, in particular, in association with the presence of pair-wise degeneracy of the eigenvalue spectrum of a product of two antisymmetric matrices.
Recent studies of heavy ion transfer reactions using large solid angle spectrometers
Authors: Szilner Suzana , Corradi Lorenzo , Pollarolo Giovanni , Colucci Giulia , Čolović Petra , Fioretto Enrico , Galtarossa Franco , Goasduff Alain , Marchi Tommaso , Mijatović Tea , Montagnoli Giovanna , Montanari Daniele , Scarlassara Fernando , Stefanini Alberto M. , Valiente-Dobón Javier Jose
Published: December 2019

We present selected results recently obtained in the study of heavy ion transfer reactions at energies close to the Coulomb barrier by employing the large solid angle magnetic spectrometer PRISMA. We discuss the production of neutron-rich heavy nuclei via multinucleon transfer processes and the related effects of secondary processes, in particular nucleon evaporation, studied in a high resolution kinematic coincidence experiment. We also present the recent results in the studies of neutron-neutron correlations for closed shell and superfluid systems.
Identification of different reaction channels in 6Li + 89Y experiment by the particles-γ coincidence measurement
Authors: Wang M.L. , Zhang G.X. , Zhang G.L. , Hu S.P. , Qu W.W. , Zhang H.Q. , Huang Z. , Xiang J.B. , Yao Y.J. , Sun H.B. , Valiente-Dobón J.J. , Testov D. , Goasduff A. , John P.R. , Siciliano M. , Galtarossa F. , Francesco R. , Mengoni D. , Bazzacco D.
Published: December 2019

This short paper presents the investigation of reaction mechanism induced by 6Li through a particle­γ coincidence measurement. The data have been taken from a 6Li+89Y experimentwhich is performed inINFN-LNL, Italy. In this experiment, the light charged particles are detected by a Si­ball, named EUCLIDES, and the γ rays are collected by a HPGe detector array, called GALILEO. In this contribution, scientific motivations, experimental details and some results, such as α­γ analysis, are presented.
Molten Salt Reactor, un RNR à combustible liquide
Authors: Guidez Joël , Campioni Guillaume
Published: December 2019

Les Molten Salt Reactors (MSR) représentent un concept original où le combustible est dissous dans un sel fondu. La réaction nucléaire se déroule au sein de ce fluide dans un espace conçu pour que la criticité soit atteinte. Puis, ce fluide combustible passe dans des échangeurs où il échauffe un sel secondaire non radioactif qui passe alors dans des générateurs de vapeur pour alimenter une turbine classique ou pour d’autres utilisations de la chaleur.
États-Unis, des femmes puissantes
Authors: Crampon Cécile
Published: December 2019

Les Américains se donnent les moyens d’une R&D sur l’énergie nucléaire et les réacteurs avancés. De la promulgation de lois favorisant la recherche à la mobilisation des industriels et des chercheurs en passant par la sollicitation d’investisseurs publics et privés, les projets sont ambitieux. Une particularité à souligner : la place prépondérante de femmes à des postes de direction des plus grandes institutions nucléaires. Des femmes d’influence, passionnées, à suivre.
Knochenersatz und Knochenaufbau
Authors: Heiß Christian , Rupp Markus , Knapp Gero
Published: December 2019

Die Behandlung von Knochendefekten kann den Operateur – abhängig von Ursache, Lokalisation und Größe – vor große Herausforderungen stellen. Zur möglichen Therapie stehen diverse Verfahren zum Knochenersatz und Knochenaufbau zur Verfügung, die dieser Artikel vorstellt.
Referenzwerte für die Zufuhr von Kohlenhydraten, Fett und Protein
Authors: Suchorski Nicolette , Richter Margrit , Bechthold Angela
Published: December 2019

Zahlreiche Ernährungsfachgesellschaften veröffentlichen Referenzwerte für die Nährstoffzufuhr gesunder Menschen. Im internationalen Vergleich liegen die D-A-CH-Referenzwerte im Rahmen der Fachgesellschaften anderer Länder. Alle empfehlen eine kohlenhydratbetonte und fettmoderate Ernährung.
Liebe Leserinnen und Leser
Authors: Szelényi Andrea , Prell Julian
Published: December 2019

Liebe Leserinnen und Leser,

die klinische Neurophysiologie hat sich diversifiziert. Ein komplexer und
interdisziplinärer Bereich ist das „intraoperative
neurophysiologische Monitoring“ (IONM). In Echtzeit gemessen, interpretiert
und informiert, nehmen neurophysiologische Messungen auf das operative Geschehen
Einfluss. Dies fordert nicht nur profunde Kenntnisse neurophysiologischer Methoden,
sondern auch anästhesiologischer Einflüsse. Das Wissen über
chirurgische Erkrankungen und operative Abläufe ist unabdingbar.
Unterarm – Strategien bei fehlgeschlagenen Osteosynthesen
Authors: Harbrecht Andreas , Hackl Michael , Wegmann Kilian , Müller Lars Peter
Published: December 2019

Der Unterarm ist als eine gelenkige Verbindung zwischen Ellenbogen und Handgelenk zu begreifen. Eine osteosynthetische Versorgung an Radius und Ulna bedarf eines profunden anatomischen Verständnisses, um die Funktion bestmöglich zu erhalten. Bei fehlgeschlagenen Osteosynthesen ist die Herausforderung ungleich höher. Ziel dieses Artikels ist es, Strategien vorzustellen, die im Falle einer Pseudarthrose, Infektion, bei speziellen Frakturformen oder Malunion nach primärer Osteosynthese zur Verfügung stehen.
Incidental Finding of Annular Pancreas in a Routine Cadaveric Dissection: Case Report
Authors: Prasad Mythraeyee , Kuriakose Theresa Susan , Rout Sipra
Published: December 2019

Annular pancreas is a rare congenital anomaly that results from the malrotation of the ventral pancreatic bud. The presentation of annular pancreas varies: it can be asymptomatic or present clinical symptoms of duodenal obstruction that can affect all age groups, from newborns to adults. In the present case report, we describe a complete type of annular pancreas at the level of the second part of the duodenum, which was an incidental finding in a prosected specimen. This anomaly has significant clinical relevance to clinicians and radiologists due to its variable presentation. The embryological, clinical and radiological aspects of this congenital anomaly are discussed in detail in the present article.
Anatomical Patterns of the Pancreatic Ductal System – A Cadaveric and Magnetic Resonance Cholangiopancreatography Study
Authors: Prasad Mythraeyee , Rout Sipra , Putta Tharani , Kurien Reuben Thomas , Chowdhury Sudipta Dhar , Eapen Anu , Hepsy Y. S. , Rabi Suganthy
Published: December 2019

Introduction Morphological variants of the pancreatobiliary system can predispose to chronic pancreatitis. The goal of the present study is to assess the prevalence of pancreatic duct patterns in the Indian population, both by cadaveric dissection and by magnetic resonance cholangiopancreatography (MRCP).

Materials and Methods A total of 15 adult pancreas specimens of unknown age and gender, and 5 fetal pancreas specimens of different gestational ages with the intact second part of duodenum, were dissected by the piecemeal method. For clinical relevance, MRCP images of 103 clinically-diagnosed chronic pancreatitis patients irrespective of their etiology were obtained retrospectively from the existing database and studied. The anatomical patterns were classified as five different types based on the course of the main pancreatic duct and the accessory pancreatic duct and their openings into the duodenal wall, including variants like pancreas divisum and ansa pancreatica.

Results In the cadaveric study, the main pancreatic duct was single with a straight course in 46.67% of the adult specimens, and in the MRCP study, the main pancreatic duct showed a descending course in 77.66% of the cases. The most common pattern was type III in both the cadaveric (80%) and radiological (55.33%) studies, and the accessory duct was absent on the MRCP in all type-III cases, while it ended blindly in the cadaveric specimens. Ansa pancreatica (type V) was observed in 1 adult specimen (6.7%), but not in the radiological study. Pancreas divisum (type IV) was observed in the 8 cases (7.76%) cases in the radiological study.

Conclusion Knowledge of the anatomical variants of the pancreatic ductal system may be helpful for the radiologists during diagnostic and therapeutic interventional procedures.