scholarly journals Solid-State Hydrogen Storage: Materials, Systems and the Relevance of a Gender Perspective

2021 ◽  
Author(s):  
Erika Michela Dematteis ◽  
Jussara Barale ◽  
Marta Corno ◽  
Alessandro Sciullo ◽  
Marcello Baricco ◽  
...  
Keyword(s):  
Solid State ◽  
Hydrogen Storage ◽  
Operating Conditions ◽  
Hydrogen Sorption ◽  
Enthalpy Of Reaction ◽  
Gender Perspective ◽  
The Social ◽  
The Impact ◽  
Kinetics Of

This paper aims at addressing the exploitation of solid-state carriers for hydrogen storage, with attention paid both to the technical aspects, through a wide review of the available integrated systems, and to the social aspects, through a preliminary overview of the connected impacts from a gender perspective. As for the technical perspective, carriers to be used for solid-state hydrogen storage for various applications can be classified into two classes: metal and complex hydrides. Related crystal structures and corresponding hydrogen sorption properties are reviewed and discussed. Fundamentals of thermodynamics of hydrogen sorption evidences the key role of the enthalpy of reaction, which determines the operating conditions (i.e. temperatures and pressures). In addition, it rules the heat to be removed from the tank during hydrogen absorption and to be delivered to the tank during hydrogen desorption. Suitable values for the enthalpy of hydrogen sorption reaction for operating conditions close to ambient (i.e. room temperature and 1-10 bar of hydrogen) are close to 30 kJ·molH2 1. The kinetics of hydrogen sorption reaction is strongly related to the microstructure and to the morphology (i.e. loose powder or pellets) of the carriers. Usually, kinetics of hydrogen sorption reaction is rather fast, and the thermal management of the tank is the rate determining step of the processes. As for the social perspective, various scenarios for the applications in different socio-economic contexts of solid-state hydrogen storage technologies are described. As it occurs with the exploitation of other renewables innovative technologies, a wide consideration of the social factors connected to these processes is needed to assess the extent to which a specific innovation might produce positive or negative impacts in the recipient socio-economic system and to explore the potential role of the social components and dynamics in fostering the diffusion of the innovation itself. Attention has been addressed to the gender perspective, in view of the enhancement of hydrogen-related energy storage systems, intended both in terms of the role of women in triggering the exploitation of hydrogen-based storage as well as to the impact of this innovation in their current conditions, at work and in daily life.

scholarly journals Solid-State Hydrogen Storage Systems and the Relevance of a Gender Perspective

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6158
Author(s):  
Erika Michela Dematteis ◽  
Jussara Barale ◽  
Marta Corno ◽  
Alessandro Sciullo ◽  
Marcello Baricco ◽  
...  
Keyword(s):  
Solid State ◽  
Hydrogen Storage ◽  
Storage Systems ◽  
Operating Conditions ◽  
Hydrogen Sorption ◽  
Enthalpy Of Reaction ◽  
Gender Perspective ◽  
The Social ◽  
Kinetics Of

This paper aims at addressing the exploitation of solid-state carriers for hydrogen storage, with attention paid both to the technical aspects, through a wide review of the available integrated systems, and to the social aspects, through a preliminary overview of the connected impacts from a gender perspective. As for the technical perspective, carriers to be used for solid-state hydrogen storage for various applications can be classified into two classes: metal and complex hydrides. Related crystal structures and corresponding hydrogen sorption properties are reviewed and discussed. Fundamentals of thermodynamics of hydrogen sorption evidence the key role of the enthalpy of reaction, which determines the operating conditions (i.e., temperatures and pressures). In addition, it rules the heat to be removed from the tank during hydrogen absorption and to be delivered to the tank during hydrogen desorption. Suitable values for the enthalpy of hydrogen sorption reaction for operating conditions close to ambient (i.e., room temperature and 1–10 bar of hydrogen) are close to 30 kJ·molH2−1. The kinetics of the hydrogen sorption reaction is strongly related to the microstructure and to the morphology (i.e., loose powder or pellets) of the carriers. Usually, the kinetics of the hydrogen sorption reaction is rather fast, and the thermal management of the tank is the rate-determining step of the processes. As for the social perspective, the paper arguments that, as it occurs with the exploitation of other renewable innovative technologies, a wide consideration of the social factors connected to these processes is needed to reach a twofold objective: To assess the extent to which a specific innovation might produce positive or negative impacts in the recipient socioeconomic system and, from a sociotechnical perspective, to explore the potential role of the social components and dynamics in fostering the diffusion of the innovation itself. Within the social domain, attention has been paid to address the underexplored relationship between the gender perspective and the enhancement of hydrogen-related energy storage systems. This relationship is taken into account both in terms of the role of women in triggering the exploitation of hydrogen-based storage playing as experimenter and promoter, and in terms of the intertwined impact of this innovation in their current conditions, at work, and in daily life.

Enhanced hydrogen storage kinetics of an Mg–Pr–Al composite by in situ formed Pr3Al11 nanoparticles

2019 ◽  
Vol 48 (22) ◽  
pp. 7735-7742 ◽  
Author(s):  
Caiqin Zhou ◽  
Can Li ◽  
Yongtao Li ◽  
Qingan Zhang
Keyword(s):  
Hydrogen Storage ◽  
Catalytic Effect ◽  
Sorption Kinetics ◽  
Hydrogen Sorption ◽  
Hydrogen Storage Kinetics ◽  
Al Composite ◽  
Kinetics Of

Hydrogen sorption kinetics for Mg–Pr–Al is enhanced by the inhibiting role of Pr3Al11 and catalytic effect of PrH3/PrH2.

scholarly journals Particle size effect in the mechanically assisted synthesis of ß-cyclodextrin mesitylene sulfonate

2020 ◽  
Author(s):  
Stéphane Menuel ◽  
Sébastien Saitzek ◽  
Eric Monflier ◽  
Frédéric HAPIOT
Keyword(s):  
Solid State ◽  
Reaction Pathway ◽  
Particle Size Effect ◽  
Data Series ◽  
Modified Cyclodextrins ◽  
Diffusion Phenomena ◽  
The Impact ◽  
Kinetics Of ◽  
Over Time

Mechanically assisted synthesis of organic compounds has recently focused considerable attention as it may be unique in features to selectively orient the reaction pathway. In the continuation of our work on the synthesis of modified cyclodextrins (CDs) via mechanochemical activation, we sought to discriminate the contribution of supramolecular effects and grinding during the course of a reaction in the solid state. As such, we recently investigated the influence of the particles size of β-CD in the synthesis of β-CD mesitylene sulfonate (β-CDMts) in the solid state using a vibrating ball-mill. We were particularly interested in the role of the particles size on the kinetics of the reaction. In this study, we show that grinding β-CD reduces the particles size over time down to a limit of 167 nm. The granulometric composition remains rather invariant for grinding times over 1 h. Each type of β-CD particles reacted with mesitylene sulfonic chloride (MtsCl) to produce β-CDMts. Contrary to what could be intuitively anticipated, smaller particles did not lead to the highest conversions. The impact of grinding over the conversions was limited. Interestingly, the proportion of β-CDMts mono-substituted on the primary face significantly increased over time when the reaction was carried out in the presence of KOH as a base. The data series were confronted with kinetics models to get clues on the way the reactions proceeded. The diversity of possible models suggests that multiple mechanochemical processes can account for the syntheses of β-CDMts in the solid state. Throughout this study, we found that the reactivity depends more upon diffusion phenomena in the crystalline parts of the material than upon the increase in the surface area of the CD particles resulting from grinding.

scholarly journals Particle size effect in the mechanically assisted synthesis of β-cyclodextrin mesitylene sulfonate

2020 ◽  
Vol 16 ◽  
pp. 2598-2606
Author(s):  
Stéphane Menuel ◽  
Sébastien Saitzek ◽  
Eric Monflier ◽  
Frédéric Hapiot
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Reaction Pathway ◽  
Particle Size Effect ◽  
Data Series ◽  
Diffusion Phenomena ◽  
The Impact ◽  
Kinetics Of ◽  
Over Time

The mechanically assisted synthesis of organic compounds has recently focused considerable attention as it may be unique in features to selectively direct the reaction pathway. In the continuation of our work on the synthesis of modified cyclodextrins (CDs) via mechanochemical activation, we sought to discriminate the contribution of supramolecular effects and grinding during the course of a reaction in the solid state. As such, we recently investigated the influence of the particle size of β-CD in the synthesis of β-CD mesitylene sulfonate (β-CDMts) in the solid state using a vibrating ball-mill. We were particularly interested in the role of the particle size on the kinetics of the reaction. In this study, we show that grinding β-CD reduces the particles size over time down to a limit of 167 nm. The granulometric composition remains rather invariant for grinding times over 1 h. Each type of β-CD particles reacted with mesitylenesulfonyl chloride (MtsCl) to produce β-CDMts. Contrary to what could be intuitively anticipated, smaller particles did not lead to the highest conversions. The impact of grinding on the conversion was limited. Interestingly, the proportion of β-CDMts mono-substituted on the primary face significantly increased over time when the reaction was carried out in the presence of KOH as a base. The data series were confronted with kinetics models to get insight in the way the reactions proceeded. The diversity of possible models suggests that multiple mechanochemical processes can account for the formation of β-CDMts in the solid state. Throughout the study, we found that the reactivity depended more upon diffusion phenomena in the crystalline parts of the material than on the increase in the surface area of the CD particles resulting from grinding.

Research on the Effects of Over-the-Counter Drug Advertising

1974 ◽  
Vol 4 (3) ◽  
pp. 223-226 ◽  
Author(s):  
Donald L. Kanter
Keyword(s):  
Drug Misuse ◽  
Pharmaceutical Advertising ◽  
Drug Usage ◽  
Over The Counter ◽  
Drug Advertising ◽  
The Social ◽  
The Media ◽  
Commercial Advertising ◽  
The Impact

Dr. Kanter presents a summary of his research assessing the role of OTC advertising in Influencing drug usage. His work represents the only systematic study of the impact of commercial advertising on drug usage. He stresses that advertising in itself does not directly lead to drug misuse but should be considered as part of a host of factors in the social environment and in the media environment that have significant influence in determining people's behavior. He also urged that the existing pharmaceutical advertising codes, which are often violated, be reviewed and strengthened.

scholarly journals Exploring the effectiveness of a COVID-19 contact tracing app using an agent-based model

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jonatan Almagor ◽  
Stefano Picascia
Keyword(s):  
High Rate ◽  
Contact Tracing ◽  
Agent Based Model ◽  
Agent Based ◽  
The Social ◽  
Behavioural Factors ◽  
The Impact ◽  
Different Levels ◽  
User Rate

AbstractA contact-tracing strategy has been deemed necessary to contain the spread of COVID-19 following the relaxation of lockdown measures. Using an agent-based model, we explore one of the technology-based strategies proposed, a contact-tracing smartphone app. The model simulates the spread of COVID-19 in a population of agents on an urban scale. Agents are heterogeneous in their characteristics and are linked in a multi-layered network representing the social structure—including households, friendships, employment and schools. We explore the interplay of various adoption rates of the contact-tracing app, different levels of testing capacity, and behavioural factors to assess the impact on the epidemic. Results suggest that a contact tracing app can contribute substantially to reducing infection rates in the population when accompanied by a sufficient testing capacity or when the testing policy prioritises symptomatic cases. As user rate increases, prevalence of infection decreases. With that, when symptomatic cases are not prioritised for testing, a high rate of app users can generate an extensive increase in the demand for testing, which, if not met with adequate supply, may render the app counterproductive. This points to the crucial role of an efficient testing policy and the necessity to upscale testing capacity.

scholarly journals Migration infrastructures and the production of migrants’ irregularity in Japan and the United Kingdom

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Nando Sigona ◽  
Jotaro Kato ◽  
Irina Kuznetsova
Keyword(s):  
Legal Status ◽  
Qualitative Interviews ◽  
Legal Violence ◽  
The United Kingdom ◽  
The Social ◽  
Access And Quality ◽  
The Uk ◽  
The Impact

AbstractThe article examines the migration infrastructures and pathways through which migrants move into, through and out of irregular status in Japan and the UK and how these infrastructures uniquely shape their migrant experiences of irregularity at key stages of their migration projects.Our analysis brings together two bodies of migration scholarship, namely critical work on the social and legal production of illegality and the impact of legal violence on the lives of immigrants with precarious legal status, and on the role of migration infrastructures in shaping mobility pathways.Drawing upon in-depth qualitative interviews with irregular and precarious migrants in Japan and the UK collected over a ten-year period, this article develops a three-pronged analysis of the infrastructures of irregularity, focusing on infrastructures of entry, settlement and exit, casting a comparative light on the mechanisms that produce precarious and expendable migrant lives in relation to access to labour and labour conditions, access and quality of housing and law enforcement, and how migrants adapt, cope, resist or eventually are overpowered by them.

Party-Political and Socio-Economic Сonsequences of Elections to the German Bundestag

2021 ◽  
pp. 24
Author(s):  
V.B. Belov
Keyword(s):  
Point Of View ◽  
The European Union ◽  
Social Democrats ◽  
The Social ◽  
Angela Merkel ◽  
The Face ◽  
German Bundestag ◽  
The Impact ◽  
Further Development

The article examines the results of the last Bundestag elections. They marked the end of the Angela Merkel era and reflected the continuation of difficult party-political and socio-economic processes in the informal leader of the European Union. The main attention of the research focuses on the peculiarities of the election campaign of the leading parties and of the search for ways of further development of Germany in the face of urgent economic and political challenges. These challenges include the impact of the coronavirus crisis, the impact of the energy and digital transition to a climate-neutral economy, and the complex international situation. Based on original sources, the author analyzes the causes of the SPD victory and the CDU/CSU bloc defeat, the results of the negotiations of the Social Democrats with the Greens and Liberals, the content of the coalition agreement from the point of view of the prospects for the development of domestic and foreign policy and the economy of Russia's main partner in the west of the Eurasian continent. The conclusion is made about the absence of breakthrough ideas, the consistent continuation of the course started by the previous government for a carbon-free economy and the strengthening of the role of Germany in Europe and the world. For this course, conflicts and problems in achieving the set goals will be immanent due to the compromising nature of the coalition agreements.

The role of public libraries in the development of social capital in local communities – a theoretical study

2021 ◽  
Vol 42 (3) ◽  
pp. 184-196
Author(s):  
Maja Dorota Wojciechowska
Keyword(s):  
Social Capital ◽  
Social Engagement ◽  
Social Life ◽  
Public Libraries ◽  
Local Communities ◽  
Social Needs ◽  
Content Type ◽  
The Social ◽  
The Impact

PurposeSocial capital, understood as intangible community values available through a network of connections, is a factor in the development of societies and improving quality of life. It helps to remove economic inequalities and prevent poverty and social exclusion, stimulate social and regional development, civic attitudes and social engagement and build a civic society as well as local and regional identity. Many of these tasks may be implemented by libraries, which, apart from providing access to information, may also offer a number of services associated with social needs. The purpose of this paper is to present the roles and functions that libraries may serve in local communities in terms of assistance, integration and development based on classical social capital theories.Design/methodology/approachThe paper reviews the classical concepts of social capital in the context of libraries. It analyses the findings of Pierre-Félix Bourdieu, James Coleman, Francis Fukuyama, Robert Putnam, Nan Lin, Ronald Stuart Burt, Wayne Baker and Alejandro Portes. Based on their respective concepts, the paper analyses the role of the contemporary library in the social life of local communities. In particular, it focuses on the possible new functions that public libraries may serve.FindingsA critical review of the concept of social capital revealed certain dependencies between libraries and their neighbourhoods. With new services that respond to the actual social needs, libraries may serve as a keystone, namely they may integrate, animate and engage local communities. This, however, requires a certain approach to be adopted by the personnel and governing authorities as well as infrastructure and tangible resources.Originality/valueThe social engagement of libraries is usually described from the practical perspective (reports on the services provided) or in the context of research on the impact of respective projects on specific groups of users (research reports). A broader approach, based on original social theories, is rarely encountered. The paper draws on classical concepts of social capital and is a contribution to the discussion on possible uses of those concepts based on an analysis of the role of libraries in social life and in strengthening the social capital of local communities.

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