scholarly journals Exotic nuclei

2019 ◽  
Vol 89 (6) ◽  
pp. 571-581
Author(s):  
B. Jonson
Keyword(s):  
Nuclear Physics ◽  
Experimental Studies ◽  
Research Area ◽  
Exotic Nuclei ◽  
Medical Applications ◽  
Radioactive Beams ◽  
Research Directions ◽  
The World ◽  
Neutron Rich Isotopes ◽  
Research Facilities

One of the most interesting and intensively examined research directions in nuclear physics, i.e., the production and investigation of exotic nuclei in the vicinity of drip-lines is investigated. An historical overview of the development of research area is provided. Methods to produce such nuclei realized at the foremost research facilities in the world, e.g., CERN in Switzerland and GSI in Germany, are described. The critical change of the nuclear structure on approaching proton and neutron drip-lines, as well as the results of experimental studies of neutron- and proton-rich nuclei, the mechanism of neutron halo formation in neutron-rich isotopes of helium, lithium, beryllium, and boron, are discussed. In addition, medical applications of radioactive beams are discussed briefly.

scholarly journals Synthesis reactions of neutron-rich isotopes of light elements

2021 ◽  
Vol 5 (2) ◽  
pp. 70-87
Author(s):  
Yu.E. Penionzhkevich
Keyword(s):  
Binding Energy ◽  
Nuclear Physics ◽  
Heavy Ion ◽  
Exotic Nuclei ◽  
Light Elements ◽  
Short Lifetime ◽  
Direct Reactions ◽  
Experimental Nuclear Physics ◽  
Neutron Rich Isotopes ◽  
Synthesis Reactions

One of the most complicated problems of experimental nuclear physics is the synthesis of exotic nuclei near the boundaries of stability. These nuclei, as a rule, are 10 or more neutrons away from stable nuclei, have a short lifetime (less than 1 ms) and low binding energy. All this determines special requirements to the choice of reactions for the synthesis of such nuclei and the method of their transportation and registration. Mainly, for the synthesis of exotic nuclei, reactions of fragmentation of the bombarding heavy ion, direct reactions of the types (p, d) , (d, p) , (d, n) , ( d , 3 He), etc., as well as reactions of fission and deep inelastic transfer are used.

scholarly journals ORGANIC CARBON DYNAMICS IN GRASSLAND SOILS. 1. BACKGROUND INFORMATION AND COMPUTER SIMULATION

1981 ◽  
Vol 61 (2) ◽  
pp. 185-201 ◽  
Author(s):  
J. A. VAN VEEN ◽  
E. A. PAUL
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Experimental Studies ◽  
Decay Rates ◽  
Background Information ◽  
Plant Residues ◽  
Decomposition Rates ◽  
Straw Decomposition ◽  
Soil Biomass ◽  
The World

The decomposition rates of 14C-labelled plant residues in different parts of the world were characterized and mathematically simulated. The easily decomposable materials, cellulose and hemicellulose, were described as being decomposed directly by the soil biomass; the lignin fraction of aboveground residues and the resistant portion of the roots entered a decomposable native soil organic matter. Here it could be decomposed by the soil biomass or react with other soil constituents in the formation of more recalcitrant soil organic matter. The transformation rates were considered to be independent of biomass size (first–order). Data from 14C plant residue incorporation studies which yielded net decomposition rates of added materials and from carbon dating of the recalcitrant soil organic matter were transformed to gross decomposition rate constants for three soil depths. The model adequately described soil organic matter transformations under native grassland and the effect of cultivation on organic matter levels. Correction for microbial growth and moisture and temperature variations showed that the rate of wheat straw decomposition, based on a full year in the field in southern Saskatchewan, was 0.05 that under optimal laboratory conditions. The relative decay rates for plant residues during the summer months of the North American Great Plains was 0.1 times that of the laboratory. Comparison with data from other parts of the world showed an annual relative rate of 0.12 for straw decomposition in England, whereas gross decomposition rates in Nigeria were 0.5 those of laboratory rates. Both the decomposable and recalcitrant organic matter were found to be affected by the extent of physical protection within the soil. The extent of protection was simulated and compared to data from experimental studies on the persistence of 14C-labelled amino acids in soil. The extent of protection influenced the steady-state levels of soil carbon upon cultivation more than did the original decomposition rates of the plant residues.

scholarly journals SPES: EXOTIC BEAMS FOR NUCLEAR PHYSICS STUDIES

2014 ◽  
Vol 27 ◽  
pp. 1460145 ◽  
Author(s):  
ALBERTO ANDRIGHETTO ◽  
MATTIA MANZOLARO ◽  
STEFANO CORRADETTI ◽  
DANIELE SCARPA ◽  
JESU VASQUEZ ◽  
...  
Keyword(s):  
Nuclear Physics ◽  
Ion Beam ◽  
Ion Source ◽  
Beam Power ◽  
Critical Element ◽  
Laser Ion Source ◽  
The Status ◽  
Direct Target ◽  
Neutron Rich Isotopes ◽  
Plasma Ion Source

The SPES project at Laboratori di Legnaro of INFN (Italy) is concentrating on the production of neutron-rich radioactive nuclei for nuclear physics experiments using uranium fission at a rate of 1013 fission/s. The emphasis on neutron-rich isotopes is justified by the fact that this vast territory has been little explored. The Radioactive Ion Beam (RIB) will be produced by the ISOL technique using proton induced fission on a direct target of UCx. The most critical element of the SPES project is the Multi-Foil Direct Target. Up to the present time, the proposed target represents an innovation in terms of its capability to sustain the primary beam power. This talk will present the status of the project financed by INFN, which is actually in the construction phase at Legnaro. In particular, developments related to the target and the ion-source activities using the surface ion source, plasma ion source, and laser ion source techniques will be reported.

A Review on Thermally Assisted Machining

2007 ◽  
Author(s):  
Shuting Lei ◽  
Frank Pfefferkorn
Keyword(s):  
Research Area ◽  
Controlled Delivery ◽  
Future Research ◽  
Numerical Work ◽  
Research Directions ◽  
Heating Source ◽  
Macro Scale ◽  
Hard And Brittle Materials ◽  
Cutting Zone ◽  
Future Research Directions

Thermally assisted machining (TAM) involves the use of a heating source to elevate the workpiece temperature at the cutting zone to facilitate the material removal process. TAM has evolved over the years with the emergence of new heating sources and the need to machine newly developed hard and brittle materials. In recent years, the main activities in this research area have been focused on laser assisted machining (LAM) at both the macro and micro scale, largely because of focused and controlled delivery of energy that can be achieved with a laser. This paper attempts to provide an overview of research in the general area of TAM, with an emphasis on LAM at the macro scale. Both experimental and theoretical/numerical work will be presented in this review. The challenges and progresses made so far will be detailed. And finally, future research directions in this area will be discussed.

scholarly journals Risk compensation and bicycle helmets: a false conclusion and uncritical citations

2018 ◽  
Author(s):  
Igor Radun ◽  
Jenni Radun ◽  
Mahsa Esmaeilikia ◽  
Timo Lajunen
Keyword(s):  
General Public ◽  
Head Injuries ◽  
Experimental Studies ◽  
Research Area ◽  
Risk Compensation ◽  
Policy Makers ◽  
Bicycle Helmets ◽  
False Conclusion ◽  
Helmet Laws ◽  
The Impact

Some researchers and many anti-helmet advocates often state that because cyclists are wearing a helmet they feel safer and take more risks. This hypothesis - risk compensation – if true, would reduce, annul or even reverse the assumed benefits of helmets in reducing head injuries. Consequently, this hypothesis is often used to oppose mandatory helmet laws. In this article, we illustrate how one of the few studies that attempted to experimentally test the hypothesis in relation to bicycle helmets arrives at a false conclusion. As a result it is often cited as evidence of risk compensation. Given the lack of experimental studies in this research area, the impact of a single study in shaping the opinions of the general public and of policy makers can be significant.

scholarly journals Neuropolityka – geneza, założenia, perspektywy rozwoju

2021 ◽  
Vol 5 ◽  
pp. 37-54
Author(s):  
Piotr Rutkowski ◽  
Jacek Ziółkowski
Keyword(s):  
Political Science ◽  
Interdisciplinary Research ◽  
Research Area ◽  
Research Directions ◽  
Biological Determinism ◽  
Main Research ◽  
Negative Results ◽  
Nature And Culture ◽  
Development Prospects ◽  
Research Tools

Neuropolityka to interdyscyplinarny obszar badań, znajdujący się na przecięciu nauk, łączący nauki polityczne z neuronaukami. Nie jest to jednak kolejny kierunek, który, zakłada determinizm biologiczny. Opiera się na przekonaniu o przenikaniu się natury i kultury w człowieku, warstwy cielesnej i umysłowej. Celem artykułu jest przybliżenie czytelnikowi historycznych i teoretycznych aspektów tego wciąż rozwijającego się obszaru badawczego. Naszkicowane zostały również narzędzia badawcze oraz główne kierunki badań neuropolitycznych. Autorzy wskazują na pozytywne jak i negatywne, skutki płynące z badań neuropolitycznych, oraz perspektywy stojące przed naukami o polityce i neuronaukami. Neuropolitics – Genesis, Assumptions, Development Prospects Neuropolitcs is an interdisciplinary research area, located at the intersection of various sciences, combining political science with neuroscience. However, it is not another direction that, as it may seem assumes biological determinism. It is based on belief about the interfusion of nature and culture, physical and mental dimensions in man. The aim of article is to familiarize the reader with the historical and theoretical aspects of this still developing research area. Also the research tools and main research directions of neuropolics were outlined. Authors indicate the positive and negative results of neuropolitics research and perspectives for political science and neurosciences.

scholarly journals Nine Years of Mobile Healthcare Research: A Bibliometric Analysis

2021 ◽  
Vol 17 (10) ◽  
pp. 144
Author(s):  
Javed Ali ◽  
Ahmad Jusoh ◽  
Norhalima Idris ◽  
Alhamzah F. Abbas ◽  
Ahmed H. Alsharif
Keyword(s):  
Citation Analysis ◽  
Healthcare Research ◽  
Future Research ◽  
Central Theme ◽  
Research Directions ◽  
Mobile Healthcare ◽  
The World ◽  
Author Keywords ◽  
Future Research Directions ◽  
Scopus Database

<p class="0abstractCxSpFirst"><span lang="EN-US">Purpose: The purpose of the paper was to explore the central keyword searched (<em>e.g., mobile healthcare</em>). It also aimed at identifying the valuable contributions made by authors, journals, countries, and institutions and their associations in ‘<em>mobile healthcare</em>’ search around the world. </span></p><p class="0abstractCxSpMiddle"><span lang="EN-US">Methodology: Data was extracted from 2012 to 2020 by using Scopus database and analysed through VOSviewer software and MS Excel. PRISMA guidelines were used to screen the records. </span></p><p class="0abstractCxSpMiddle"><span lang="EN-US">Analysis: Co-authorship, Co-occurrence, Bibliographic Coupling and Co-citation analysis were executed to identify the links and collaborations among the authors, countries, author keywords and documents globally. </span></p><p class="0abstractCxSpMiddle"><span lang="EN-US">Findings: Results showed that <em>Yang X</em>. had the highest association with other authors and <em>Sood, S.K.</em> had published more documents than others. <em>Australia</em> was found to have the highest association with other countries, and <em>India</em> was leading other countries in publications. <em>Computers and Electrical Engineering</em> was found to be the leading journal in publication of documents. </span></p><p class="0abstractCxSpLast"><span lang="EN-US">Originality:<em> </em>This study, to best of our knowledge, was the first of its kind in mapping the ‘<em>mobile healthcare</em>’ search which was designed till 2020. This will aid in shaping and understanding the central theme and set the future research directions for the researchers.</span></p>

scholarly journals ANSWER TO COMMENTS (COMMENT FOR THE ARTICLE OF L.G. ANTIPENKO)

Metaphysics ◽  
2020 ◽  
pp. 125-130
Author(s):  
Yu. S Vladimirov
Keyword(s):  
Research Area ◽  
The World

The article proposes an answer to those expressed in our group by L.G. Antipenko comments on the development of the relational picture of the world, as well as on the proposal of Antipenko, explain the foundations of binary pregeometry and show what has already been carried out in the framework of this research area.

scholarly journals Challenges of Urban Transport in the Face of Studentification – A Case Study of Toruń

2018 ◽  
Vol 11 (4) ◽  
pp. 90-109
Author(s):  
Mirosław Wylon ◽  
Agnieszka Kempa ◽  
Alicja Słowy ◽  
Justyna Chodkowska-Miszczuk
Keyword(s):  
Public Transport ◽  
Research Area ◽  
Urban Transport ◽  
Research Approach ◽  
Relative Speed ◽  
Multi Stage ◽  
The World ◽  
The Face ◽  
Different Dimensions

Summary Subject and purpose of work: Urban transport is a key element of the functioning of urban agglomerations around the world. As it is of strategic importance, the needs of its users have to be diagnosed. Due to the fact that students are the most numerous social group using public transport, particular attention should be paid to students as the real creators of the needs of urban transport. The paper aims to diagnose the challenges in urban transport shaped by the process of studentification based on the case study of Toruń. Materials and methods: The multi-stage research approach was adopted, among others a survey among students. The choice of the research area was determined by the fact that Toruń is one of the largest academic centres in Poland. Results: Toruń is experiencing the effects of the studentification process in different dimensions, including the spatial and transport facets. Conclusions: The majority of students use public transport, daily or several times a week. The most preferred means of transport is the tram owing to its relative speed and punctuality.

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