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1. |
Record Nr. |
UNINA9910131367803321 |
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Autore |
Peter Christophe |
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Titolo |
Goût pour les jeux vidéo, goût pour le sport, deux activités liées chez les adolescents / / Christophe Peter |
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Pubbl/distr/stampa |
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Paris, : Département des études, de la prospective et des statistiques, 2015 |
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ISBN |
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Descrizione fisica |
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Altri autori (Persone) |
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Soggetti |
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Sociology |
jeux vidéo |
pratiques culturelles |
adolescence |
sport |
déterminant sexué |
construction identitaire |
cultural participation |
computer games |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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Goût pour les jeux vidéo et goût pour le sport sont souvent opposés : en termes de types d’activités (les premiers d’intérieur, passifs, peu propices à la socialisation, le second de dépense physique, de plein air, bon pour la santé, etc.) ; en termes de genre : les garçons seraient les plus « touchés » par le monde virtuel ; enfin en termes de « politique », la consommation des jeux vidéo étant opposée aux « vraies » pratiques culturelles… Une analyse secondaire de l’enquête sur les loisirs culturels des 6-14 ans fournit un éclairage précis sur la façon dont pratiques numériques virtuelles et pratiques réelles s’opposent, se substituent ou s’articulent : elle met à jour les ressorts qui sont communs aux goûts pour les deux types d’activité et révèle une forte dimension identitaire. Elle met également en évidence la permanence |
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des déterminants sexués en matière de loisirs. La comparaison des interactions qui se nouent dans le monde réel avec les interactions virtuelles qui caractérisent les jeux vidéo dessine de nouvelles approches des phénomènes d’identification affective dans ces derniers. L’importance accordée à l’esthétique des corps virtuels pourrait ainsi être rapprochée de celle prise par l’apparence corporelle dans la construction identitaire des jeunes. Loin de constituer une pratique virtuelle séparée du reste de leur vie, qui serait porteuse d’addiction ou de comportements violents, les jeux vidéo prennent place dans une élaboration de soi à la fois personnelle et sociale qui facilite l’identification à un genre sexué et à un univers culturel. Contrasts are often drawn between the liking for video games and the liking for sport. First, as regards the kind of activity: one passive, indoors, cut off from others; the other physically active, outdoor, healthy, etc. Second, as regards gender: boys are considered to be more allured by the virtual dimension.Third, as regards policy: video game playing is often set against “real” cultural practices. A more… |
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2. |
Record Nr. |
UNINA9910566470303321 |
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Autore |
Assad Safwan El |
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Titolo |
Cryptography and Its Applications in Information Security |
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Pubbl/distr/stampa |
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Basel, : MDPI - Multidisciplinary Digital Publishing Institute, 2022 |
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Descrizione fisica |
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1 electronic resource (202 p.) |
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Soggetti |
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Technology: general issues |
History of engineering & technology |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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Nowadays, mankind is living in a cyber world. Modern technologies involve fast communication links between potentially billions of devices through complex networks (satellite, mobile phone, Internet, Internet |
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of Things (IoT), etc.). The main concern posed by these entangled complex networks is their protection against passive and active attacks that could compromise public security (sabotage, espionage, cyber-terrorism) and privacy. This Special Issue “Cryptography and Its Applications in Information Security” addresses the range of problems related to the security of information in networks and multimedia communications and to bring together researchers, practitioners, and industrials interested by such questions. It consists of eight peer-reviewed papers, however easily understandable, that cover a range of subjects and applications related security of information. |
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3. |
Record Nr. |
UNINA9910815368903321 |
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Titolo |
Reviews of accelerator science and technology . Volume 5, 2012 Applications of superconducting technology to accelerators / / editors, Alexander W. Chao, SLAC National Accelerator Laboratory, USA, Weiren Chou, Fermi National Accelerator Laboratory, USA |
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Pubbl/distr/stampa |
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[Hackensack] N.J., : World Scientific, c2012 |
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New Jersey : , : World Scientific, , [2012] |
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�2012 |
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ISBN |
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1-299-46278-2 |
981-4449-95-4 |
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Descrizione fisica |
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1 online resource (viii, 360 pages) : illustrations (some color) |
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Collana |
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Reviews of accelerator science and technology ; ; v. 5/2002 |
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Disciplina |
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Soggetti |
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Particle accelerators |
Superconductors |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references. |
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Nota di contenuto |
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Contents; Editorial Preface; Overview of Superconductivity and Challenges in Applications Rene Flukiger; 1. Overview of Superconducting Properties; 1.1. Introduction; 1.2. Historical; 1.3. Meissne reflect and penetration length; 1.4. Heat capacity of superconductors; 1.5. The mixed state; 1.6. The Bean critical state |
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model; 1.7. Stabilization criteria for superconducting wires; 1.8. Relation between Jc, Bc2 and Tc; 2. Challenges for Superconducting Materials and Conductors; 2.1. Time between discovery and application; 2.2. Superconducting materials with higher Tc values |
2.2.1. The search for new superconductors 2.3. Superconducting wires and tapes for applications; 2.4. Wires for high field magnets; 2.4.1. Field ranges and challenges; 2.5. Wires for magnets operating in the persistent mode; 2.6. Wires for accelerator magnets; 2.7. Wires for fusion magnets; 2.8. The critical current density; 2.8.1. Pinning strength in LTS compounds; 2.8.2. Pinning strength in HTS compounds; 2.8.3. High energy irradiation of superconductors; 3. Challenges in Superconducting Applications; 3.1. Applications in energy; 3.1.1. Superconducting magnetic energy storage |
3.1.2. Power cables 3.1.3. Fault current limiters; 3.1.4. Motors and generators; 3.2. Applications in medicine; 3.3. Applications in communications; 3.4. Energy storage; 4. Conclusions; References; Superconducting Materials and Conductors: Fabrication and Limiting Parameters Luca Bottura and Arno Godeke; 1. A Perspective on Applied Superconductivity for HEP Magnets; 2. Relevant Parameters for Application in Accelerator Magnets; 2.1. Critical current density; 2.2. Stabilizer; 2.3. Magnetization, flux jumps, AC loss; 2.4. Mechanical properties; 2.4.1. Axial strain sensitivity |
2.4.2. Transverse pressure on cables 2.5. Manufacturing properties; 3. State-of-the-Art Conductors for HEP; 3.1. Nb-Ti; 3.1.1. Discovery and beginnings; 3.1.2. State of the art; 3.1.3. Challenges; 3.2. Nb3Sn; 3.2.1. Discovery and beginnings; 3.2.2. State of the art; 3.2.3. Challenges; 4. Advances in HTS Materials; 4.1. Bi-2212; 4.2. YBCO; 4.3. Further challenges; 5. Superconducting Cables; 6. Summary; Acknowledgments; References; Superconducting Magnets for Particle Accelerators Lucio Rossi and Luca Bottura; 1. Introduction; 2. Main Characteristics of Superconducting Magnets for Accelerators |
2.1. Functions of superconducting magnets 2.2. Magnet design; 2.2.1. Electromagnetic design; 2.2.2. Alternative configurations; 2.2.3. High current density; 2.2.4. Superconductor, load line and margins; 2.2.5. The iron yoke; 2.2.6. Field quality and harmonic content; 2.3. Magnet structure and forces; 2.4. Quench detection and protection; 2.5. Integration; 3. Brief History of Superconducting Magnets for Accelerators; 3.1. Early history; 3.2. Tevatron and Isabelle; 3.3. HERA and UNK; 3.4. RHIC; 3.5. LHC and SSC; 3.5.1. The rise and fall of the giant: SSC; 3.5.2. LHC: "small and smart" |
3.5.3. LHC dipole magnet design |
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Sommario/riassunto |
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Over the past several decades major advances in accelerators have resulted from breakthroughs in accelerator science and accelerator technology. After the introduction of a new accelerator physics concept or the implementation of a new technology, a leap in accelerator performance followed. A well-known representation of these advances is the Livingston chart, which shows an exponential growth of accelerator performance over the last seven or eight decades. One of the breakthrough accelerator technologies that support this exponential growth is superconducting technology. Recognizing this major |
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