Simplement Impressionnant !
Vivre une expérience unique à travers cette belle illustration du voyage à travers l'Univers Microscopique et Macroscopique
http://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.html
Les réseaux électriques intelligents, une opportunité pour le service public ...Réseau Tepos
LES RÉSEAUX ÉLECTRIQUES EN MILIEU RURAL : PRODUIRE ET CONSOMMER ; MINI ET SMART GRID
Quelles sont les possibilités pour les collectivités locales de faire évoluer leurs réseaux de transports et de distribution d’électricité afin de gérer et mettre en adéquation à chaque instant la demande en énergie d’une part et la production locale d’électricité à partir des renouvelables d’autre part ?
La maîtrise de la demande, le stockage de l’énergie et l’intelligence des réseaux sont des thèmes qui seront évoqués à partir d’expériences réelles.
Animé par Yvon Basset, directeur régional adjoint de l’ADEME Bretagne
Intervenants :
> Les réseaux électriques intelligents, une opportunité pour le service public local de l'électricité ?
> Et en France, où en sommes-nous sur la prédiction, le stockage de l'énergie et les réseaux intelligents ?
Julien Robillard, consultant
> Virvolt - Pays de Saint Brieuc
Roger Rouillé, vice-président du Pays de Saint Brieuc en charge de l’énergie, et Sébastien Fassy, directeur de l’agence locale de l’énergie du Pays de Saint-Brieuc
> Le projet "KombiKraftwerk"
Undine ZILLER, de l’Agence pour les énergies renouvelables de Berlin
> Projet "smart grid" en cours de développement à Montdidier
Laurent Morelle, directeur de la Régie Communale de Montdidier, et Nicolas Houdant, Énergies Demain
Cet atelier s'est déroulé le jeudi 16 juin 2011 dans le Mené, dans le cadre des 1ères rencontres nationales "énergie et territoires ruraux, vers des territoires à énergie positive".
Plus d'informations: www.territoires-energie-positive.fr
wireless electricity and power transmissionStudent
The document discusses various techniques for wireless transmission of energy including near field techniques like inductive coupling and resonant inductive coupling, and far field techniques like laser power transmission, microwave power transmission, and solar power satellites. It provides details on how inductive coupling, resonant inductive coupling, microwave power transmission, and solar power satellites work. The document also discusses advantages and disadvantages of near field and far field techniques as well as applications of wireless power transmission including electric vehicle charging, consumer electronics, and industrial uses.
The document discusses the memristor, a new type of circuit element. It provides an overview of what a memristor is, how it works, its properties and benefits. A memristor is a two-terminal semiconductor device that can remember the amount of charge that has passed through it. It was first proposed in 1971 and works by changing resistance based on the direction and amount of current flow. Memristors have advantages like non-volatility, high density storage and lower power consumption. They could replace transistors and enable new technologies like boot-free computers with high storage capacity. However, challenges remain around speed, design standards and heat dissipation.
The document discusses different modes of heat transfer including conduction, convection, and radiation. It provides examples of each process and how they apply in everyday contexts like heating liquids and gases, land and sea breezes, and applications like geothermal power stations, vacuum flasks, solar panels, water heaters, and refrigerators. Materials are chosen based on their ability to conduct or insulate heat transfer by different mechanisms.
Les réseaux électriques intelligents, une opportunité pour le service public ...Réseau Tepos
LES RÉSEAUX ÉLECTRIQUES EN MILIEU RURAL : PRODUIRE ET CONSOMMER ; MINI ET SMART GRID
Quelles sont les possibilités pour les collectivités locales de faire évoluer leurs réseaux de transports et de distribution d’électricité afin de gérer et mettre en adéquation à chaque instant la demande en énergie d’une part et la production locale d’électricité à partir des renouvelables d’autre part ?
La maîtrise de la demande, le stockage de l’énergie et l’intelligence des réseaux sont des thèmes qui seront évoqués à partir d’expériences réelles.
Animé par Yvon Basset, directeur régional adjoint de l’ADEME Bretagne
Intervenants :
> Les réseaux électriques intelligents, une opportunité pour le service public local de l'électricité ?
> Et en France, où en sommes-nous sur la prédiction, le stockage de l'énergie et les réseaux intelligents ?
Julien Robillard, consultant
> Virvolt - Pays de Saint Brieuc
Roger Rouillé, vice-président du Pays de Saint Brieuc en charge de l’énergie, et Sébastien Fassy, directeur de l’agence locale de l’énergie du Pays de Saint-Brieuc
> Le projet "KombiKraftwerk"
Undine ZILLER, de l’Agence pour les énergies renouvelables de Berlin
> Projet "smart grid" en cours de développement à Montdidier
Laurent Morelle, directeur de la Régie Communale de Montdidier, et Nicolas Houdant, Énergies Demain
Cet atelier s'est déroulé le jeudi 16 juin 2011 dans le Mené, dans le cadre des 1ères rencontres nationales "énergie et territoires ruraux, vers des territoires à énergie positive".
Plus d'informations: www.territoires-energie-positive.fr
wireless electricity and power transmissionStudent
The document discusses various techniques for wireless transmission of energy including near field techniques like inductive coupling and resonant inductive coupling, and far field techniques like laser power transmission, microwave power transmission, and solar power satellites. It provides details on how inductive coupling, resonant inductive coupling, microwave power transmission, and solar power satellites work. The document also discusses advantages and disadvantages of near field and far field techniques as well as applications of wireless power transmission including electric vehicle charging, consumer electronics, and industrial uses.
The document discusses the memristor, a new type of circuit element. It provides an overview of what a memristor is, how it works, its properties and benefits. A memristor is a two-terminal semiconductor device that can remember the amount of charge that has passed through it. It was first proposed in 1971 and works by changing resistance based on the direction and amount of current flow. Memristors have advantages like non-volatility, high density storage and lower power consumption. They could replace transistors and enable new technologies like boot-free computers with high storage capacity. However, challenges remain around speed, design standards and heat dissipation.
The document discusses different modes of heat transfer including conduction, convection, and radiation. It provides examples of each process and how they apply in everyday contexts like heating liquids and gases, land and sea breezes, and applications like geothermal power stations, vacuum flasks, solar panels, water heaters, and refrigerators. Materials are chosen based on their ability to conduct or insulate heat transfer by different mechanisms.
Ferrite Specifications and ACME Ferrites (1)Ray Lai
ACME Electronics Corporation provides a document summarizing specifications of ferrites used in electronics. It discusses key material specifications including initial permeability, amplitude permeability, saturation flux density, and core loss density. It explains that permeability is nonlinear and dependent on factors like temperature, load, and flux density. The document also illustrates hysteresis effects using SPICE simulations and explains how hysteresis properties like remanence and coercivity impact inductance values.
Poonan-wireless electricity and power transmissionPoonan Sahoo
Wireless electricity has several advantages over wired systems including more efficient and reliable power delivery, reduced dependence on wires and batteries, and a more eco-friendly solution. While Nikola Tesla first proposed wireless power transmission in 1891, recent technological advances allow for both short-range inductive coupling and mid-range resonant inductive coupling. Long-range microwave transmission also shows promise for applications like powering satellites and lunar projects. However, wireless power systems face challenges of power loss, safety concerns, and high installation costs that need to be addressed for broader adoption.
This document discusses power system stability in three chapters. It defines three types of stability - steady state, transient, and dynamic - and describes each. Steady state stability relates to gradual load increases, dynamic stability involves oscillations from small disturbances, and transient stability concerns large disturbances. The chapter continues by deriving the swing equation that models generator rotor dynamics and stability. It describes how this equation applies to both single and multi-machine systems. The document concludes by discussing power flow under steady state conditions, the equal area criteria for stability, critical clearing angles and times for faults.
A flexible alternating current transmission system (FACTS) is a system composed of static equipment used for the AC transmission of electrical energy. It is meant to enhance controllability and increase power transfer capability of the network. It is generally a power electronics-based system.
In conventional AC transmission system, the ability to transfer AC power is limited by several factors like thermal limits, transient stability limit, voltage limit, short circuit current limit etc. These limits define the maximum electric power which can be efficiently transmitted through the transmission line without causing any damage to the electrical equipments and the transmission lines. This is normally achieved by bringing changes in the power system layout. However this is not feasible and another way of achieving maximum power transfer capability without any changes in the power system layout. Also with the introduction of variable impedance devices like capacitors and inductors, whole of the energy or power from the source is not transferred to the load, but a part is stored in these devices as reactive power and returned back to the source. Thus the actual amount of power transferred to the load or the active power is always less than the apparent power or the net power. For ideal transmission the active power should be equal to the apparent power. In other words, the power factor (the ratio of active power to apparent power) should be unity. This is where the role of Flexible AC transmission System comes.
The document discusses a seminar presentation on Magneto Optical Current Transformers (MOCT). It begins with an introduction on the need for accurate current transformers and limitations of conventional transformers. It then covers the principles and workings of MOCT, which uses the Faraday effect to measure current through a glass prism. The document outlines the design, block diagram, applications and advantages of MOCT over conventional transformers, such as immunity to electromagnetic interference. It concludes by stating MOCT eliminates many drawbacks of conventional current transformers.
Dielectric Properties of Insulating Materialsrajendra purkar
Dielectric Properties of Insulating Materials, in Material Science
different material used in Power system as Insulators and their required properties and applications.
The document discusses various conductive materials including fuses, RTDs, and superconductors. It provides details on:
- How fuses work by melting when excessive current flows to interrupt circuits and prevent damage. Common types include low voltage cartridge and semi-enclosed fuses.
- RTDs which use materials like platinum that change resistance based on temperature, allowing highly accurate temperature measurement in applications like furnaces.
- Superconductors which have zero resistivity below a critical temperature, such as certain metals and compounds. They exhibit properties like the Meissner effect and have diverse applications in areas like power transmission, medical devices, and computing.
ARTIFICIAL TREE ENERGY HARVESTING"A FUTURE ELECTRICITY"Milind Kumar
A best way to harvest the sun power as well as the wind power for our domestic as well as the industries uses.The power output will depends on the size and the solar cell quality used.
Further this can modified and the solar cells can be replaced by the Thermo-Photo Voltaic cells which will be more efficient than the solar cells .we can gather the energy up-to 84% by using thermo photo voltaic cells.
The wind part structure can be also modified ,that means we can further design the trunk structure which can be able to rotate when the wind force falls upon that.
this chapter deals with fault analysis of a power system. under this topic, only symmetrical fault analysis is given. it will describe the methods used to determine fault current and voltage values.
Paper batteries provide a flexible, lightweight alternative to conventional batteries. They are constructed by combining carbon nanotubes with cellulose-based paper to form electrodes. During use, an oxidation reaction occurs at the anode while a reduction reaction occurs at the cathode, generating a flow of electrons. Paper batteries have advantages over conventional batteries like being bendable, biodegradable, and able to charge within 10 seconds. However, they also have disadvantages such as higher cost and challenges related to scaling up. Potential applications include use in electronics like watches, calculators, and laptops.
Moletronics or molecular electronics - technical seminarSUKHWINDER SINGH
Molecular electronics is an emerging technology that uses individual molecules as electronic components like diodes and transistors to build circuits. It works by manipulating molecules so they function together electronically. Materials used include organic polymers, polyphenylene chains, carbon nanotubes. Advantages over conventional electronics include smaller size and lower costs, while challenges remain in controlled fabrication at the molecular scale. Potential applications include molecular sensors, switches, memory storage that could revolutionize computing.
The document summarizes the history and development of wireless power transfer technology. It discusses Nikola Tesla's early experiments in the late 1800s, developments in the 1970s using highly elliptical antennas, and more recent inductive charging methods. The document then focuses on an MIT experiment that demonstrated efficient wireless power transfer over distances of several meters using resonant magnetic coupling between coils, an approach called "WiTricity". Advantages of this approach include more efficient power transfer without health or environmental effects compared to batteries. The technology is poised to enable wireless charging of many consumer electronic devices.
1. Load frequency control (LFC) is used to maintain the frequency and power flow between interconnected power systems within specified limits.
2. LFC is important for reliable electric power supply with good quality. Proportional-integral control is one strategy that has been proposed to improve LFC performance.
3. In this thesis, a proportional-integral controller technique is employed to design an efficient load frequency controller for a two-area interconnected hydro power system. The design aims to achieve zero steady-state error and ensure good transient response to disturbances while maintaining closed-loop stability.
The single electron transistor is made of an island/quantum dot connected through two tunneling junctions to a drain and a source electrode. When there is no bias on any electrode, electrons in the system do not have enough energy to tunnel through the junctions i.e. the transistor is in off state.
Ferrite Specifications and ACME Ferrites (1)Ray Lai
ACME Electronics Corporation provides a document summarizing specifications of ferrites used in electronics. It discusses key material specifications including initial permeability, amplitude permeability, saturation flux density, and core loss density. It explains that permeability is nonlinear and dependent on factors like temperature, load, and flux density. The document also illustrates hysteresis effects using SPICE simulations and explains how hysteresis properties like remanence and coercivity impact inductance values.
Poonan-wireless electricity and power transmissionPoonan Sahoo
Wireless electricity has several advantages over wired systems including more efficient and reliable power delivery, reduced dependence on wires and batteries, and a more eco-friendly solution. While Nikola Tesla first proposed wireless power transmission in 1891, recent technological advances allow for both short-range inductive coupling and mid-range resonant inductive coupling. Long-range microwave transmission also shows promise for applications like powering satellites and lunar projects. However, wireless power systems face challenges of power loss, safety concerns, and high installation costs that need to be addressed for broader adoption.
This document discusses power system stability in three chapters. It defines three types of stability - steady state, transient, and dynamic - and describes each. Steady state stability relates to gradual load increases, dynamic stability involves oscillations from small disturbances, and transient stability concerns large disturbances. The chapter continues by deriving the swing equation that models generator rotor dynamics and stability. It describes how this equation applies to both single and multi-machine systems. The document concludes by discussing power flow under steady state conditions, the equal area criteria for stability, critical clearing angles and times for faults.
A flexible alternating current transmission system (FACTS) is a system composed of static equipment used for the AC transmission of electrical energy. It is meant to enhance controllability and increase power transfer capability of the network. It is generally a power electronics-based system.
In conventional AC transmission system, the ability to transfer AC power is limited by several factors like thermal limits, transient stability limit, voltage limit, short circuit current limit etc. These limits define the maximum electric power which can be efficiently transmitted through the transmission line without causing any damage to the electrical equipments and the transmission lines. This is normally achieved by bringing changes in the power system layout. However this is not feasible and another way of achieving maximum power transfer capability without any changes in the power system layout. Also with the introduction of variable impedance devices like capacitors and inductors, whole of the energy or power from the source is not transferred to the load, but a part is stored in these devices as reactive power and returned back to the source. Thus the actual amount of power transferred to the load or the active power is always less than the apparent power or the net power. For ideal transmission the active power should be equal to the apparent power. In other words, the power factor (the ratio of active power to apparent power) should be unity. This is where the role of Flexible AC transmission System comes.
The document discusses a seminar presentation on Magneto Optical Current Transformers (MOCT). It begins with an introduction on the need for accurate current transformers and limitations of conventional transformers. It then covers the principles and workings of MOCT, which uses the Faraday effect to measure current through a glass prism. The document outlines the design, block diagram, applications and advantages of MOCT over conventional transformers, such as immunity to electromagnetic interference. It concludes by stating MOCT eliminates many drawbacks of conventional current transformers.
Dielectric Properties of Insulating Materialsrajendra purkar
Dielectric Properties of Insulating Materials, in Material Science
different material used in Power system as Insulators and their required properties and applications.
The document discusses various conductive materials including fuses, RTDs, and superconductors. It provides details on:
- How fuses work by melting when excessive current flows to interrupt circuits and prevent damage. Common types include low voltage cartridge and semi-enclosed fuses.
- RTDs which use materials like platinum that change resistance based on temperature, allowing highly accurate temperature measurement in applications like furnaces.
- Superconductors which have zero resistivity below a critical temperature, such as certain metals and compounds. They exhibit properties like the Meissner effect and have diverse applications in areas like power transmission, medical devices, and computing.
ARTIFICIAL TREE ENERGY HARVESTING"A FUTURE ELECTRICITY"Milind Kumar
A best way to harvest the sun power as well as the wind power for our domestic as well as the industries uses.The power output will depends on the size and the solar cell quality used.
Further this can modified and the solar cells can be replaced by the Thermo-Photo Voltaic cells which will be more efficient than the solar cells .we can gather the energy up-to 84% by using thermo photo voltaic cells.
The wind part structure can be also modified ,that means we can further design the trunk structure which can be able to rotate when the wind force falls upon that.
this chapter deals with fault analysis of a power system. under this topic, only symmetrical fault analysis is given. it will describe the methods used to determine fault current and voltage values.
Paper batteries provide a flexible, lightweight alternative to conventional batteries. They are constructed by combining carbon nanotubes with cellulose-based paper to form electrodes. During use, an oxidation reaction occurs at the anode while a reduction reaction occurs at the cathode, generating a flow of electrons. Paper batteries have advantages over conventional batteries like being bendable, biodegradable, and able to charge within 10 seconds. However, they also have disadvantages such as higher cost and challenges related to scaling up. Potential applications include use in electronics like watches, calculators, and laptops.
Moletronics or molecular electronics - technical seminarSUKHWINDER SINGH
Molecular electronics is an emerging technology that uses individual molecules as electronic components like diodes and transistors to build circuits. It works by manipulating molecules so they function together electronically. Materials used include organic polymers, polyphenylene chains, carbon nanotubes. Advantages over conventional electronics include smaller size and lower costs, while challenges remain in controlled fabrication at the molecular scale. Potential applications include molecular sensors, switches, memory storage that could revolutionize computing.
The document summarizes the history and development of wireless power transfer technology. It discusses Nikola Tesla's early experiments in the late 1800s, developments in the 1970s using highly elliptical antennas, and more recent inductive charging methods. The document then focuses on an MIT experiment that demonstrated efficient wireless power transfer over distances of several meters using resonant magnetic coupling between coils, an approach called "WiTricity". Advantages of this approach include more efficient power transfer without health or environmental effects compared to batteries. The technology is poised to enable wireless charging of many consumer electronic devices.
1. Load frequency control (LFC) is used to maintain the frequency and power flow between interconnected power systems within specified limits.
2. LFC is important for reliable electric power supply with good quality. Proportional-integral control is one strategy that has been proposed to improve LFC performance.
3. In this thesis, a proportional-integral controller technique is employed to design an efficient load frequency controller for a two-area interconnected hydro power system. The design aims to achieve zero steady-state error and ensure good transient response to disturbances while maintaining closed-loop stability.
The single electron transistor is made of an island/quantum dot connected through two tunneling junctions to a drain and a source electrode. When there is no bias on any electrode, electrons in the system do not have enough energy to tunnel through the junctions i.e. the transistor is in off state.
Conformité des Données Scientifiques avec les Récits Coraniques
L'ensemble des 1300 versets Coraniques (sur un ensemble d'environ 6325) sont tous conformes avec la science, témoignages de plusieur savants : Prof Keith L. Moore. Prof. MAurice Bucaille, Dr. Garry Miller....Dr. NAke Zakir, ...Youssef Estes...
Dieu a promis les croyants la jouissance dans deux paradis.
Le coran a décrit amplement la beauté du paradis éternel, constitué de 100 niveaux, dont l'espace d'un seul niveau est entre les cieux et la terre.
Ou se trouve le 1er paradis ?
c'est de vivre le Paradis sur terre avant le paradis éternel.
Étrangement, les trois clés ou piliers du paradis éternel (Porter la Foi, S'entre-aimer, Être un instrument de paix et d'apaisement) se retrouvent également les clés du paradis sur terre et en particulier au foyer.
Si Dieu aime du bien dans un foyer il y fait pénétrer la douceur (non la violence).
Sommaire:
1- Foyer de la MISÉRICORDE
2- Mérite du JIHAD est aussi pour les femmes
3- CLÉS DU PARADIS chez soi
4- DOUCEUR au foyer, NON à la Violence
5- Chez toi, ressembles-tu au Prophète, Mohamed, psl ?
6- DIX OUTILS pour entretenir le bonheur & l’amour
7- Pour une ENTENTE durable
8- Projets spéciaux urgents
9- CRITÈRES IDÉAUX DES CONJOINTS EN ISLAM
10- COMMENT AVOIR TON CONJOINT COMME PARTENAIRE ET ALLIÉ (E) ?
11- REMÈDES en cas de conflits
12- Relations DES PARENTS avec LES ENFANTS
13- Relation envers LES PARENTS
14- Quelques situations particulieres
Pour plus de détails consulter le site suivant :
www.ecole-a3p.com
http://www.hayat.ca/archives/category/chroniqueurs/dr-chraibi
http://www.ecole.ecole-a3p.com/mod/resource/view.php?id=483
Islam & relations avec les autres religions: Chrétienne et juive.
Celui qui fait du mal à un Dhimmi (Juif ou Chrétien) je serai son adversaire dans l'au delà, et je le poursuivrai devant Dieu dans l'au delà.
Yusuf Estes is an American who was brought up Protestant Christian in Texas but later converted to Islam. He served as the National Muslim Chaplain for the U.S. Bureau of Prisons and participated in the United Nations World Peace Conference for Religious Leaders.
Yusuf Estes tells the story of his conversion to Islam over 5 videos. He describes growing up Christian in the United States and his initial skepticism towards Islam. However, after studying the Quran and Islamic teachings, he was convinced of their truth and embraced Islam. Now he travels the world sharing his journey to help others learn about Islam from a former Christian perspective.
Zakir Naik is an Islamic preacher, lecturer, and writer from India who founded the Islamic Research Foundation. Since 1991, he has focused on preaching Islam full-time after abandoning his career as a medical doctor. He is known for his impressive memory of the Quran and Bible. The document provides biographical details on Naik such as his education, public lectures internationally, books authored, and fields of interest in comparative religion and Islamic propagation.
Khalid Yasin is an American-born Islamic teacher and lecturer who currently lives in Manchester, England. He founded several Islamic organizations in the UK, including the Islamic Broadcasting Corporation and The Purpose of Life Centre in Sheffield, which was accused of fraud. Yasin has faced some controversy over his views supporting Osama bin Laden after 9/11 and making claims about the AIDS virus. He produces numerous lectures and media promoting his interpretation of Islam.
Imam Zaid Shakir is an influential American Muslim scholar. He was born in California and served in the US Air Force before accepting Islam in 1977. He has extensive Islamic education, obtaining degrees from American University and Rutgers University before studying Arabic and Islamic sciences in Syria and Morocco for seven years. He has worked as an imam and lecturer in the US, establishing several Islamic centers and organizations. Shakir is considered one of the top Islamic scholars in the US and speaks frequently on issues related to Islam and the American Muslim community.
This document provides links to over 100 YouTube videos about people from various backgrounds converting to Islam. It includes stories of converts from Christianity, Judaism, and other religions and countries around the world such as France, Germany, the United States, China, Japan, and many others. The wide variety of conversion stories presented in the links suggest that people from all walks of life are accepting Islam.
Ouvrez la porte ou prenez un mur (Agile Tour Genève 2024)Laurent Speyser
(Conférence dessinée)
Vous êtes certainement à l’origine, ou impliqué, dans un changement au sein de votre organisation. Et peut être que cela ne se passe pas aussi bien qu’attendu…
Depuis plusieurs années, je fais régulièrement le constat de l’échec de l’adoption de l’Agilité, et plus globalement de grands changements, dans les organisations. Je vais tenter de vous expliquer pourquoi ils suscitent peu d'adhésion, peu d’engagement, et ils ne tiennent pas dans le temps.
Heureusement, il existe un autre chemin. Pour l'emprunter il s'agira de cultiver l'invitation, l'intelligence collective , la mécanique des jeux, les rites de passages, .... afin que l'agilité prenne racine.
Vous repartirez de cette conférence en ayant pris du recul sur le changement tel qu‘il est généralement opéré aujourd’hui, et en ayant découvert (ou redécouvert) le seul guide valable à suivre, à mon sens, pour un changement authentique, durable, et respectueux des individus! Et en bonus, 2 ou 3 trucs pratiques!
Le Comptoir OCTO - Qu’apporte l’analyse de cycle de vie lors d’un audit d’éco...OCTO Technology
Par Nicolas Bordier (Consultant numérique responsable @OCTO Technology) et Alaric Rougnon-Glasson (Sustainable Tech Consultant @OCTO Technology)
Sur un exemple très concret d’audit d’éco-conception de l’outil de bilan carbone C’Bilan développé par ICDC (Caisse des dépôts et consignations) nous allons expliquer en quoi l’ACV (analyse de cycle de vie) a été déterminante pour identifier les pistes d’actions pour réduire jusqu'à 82% de l’empreinte environnementale du service.
Vidéo Youtube : https://www.youtube.com/watch?v=7R8oL2P_DkU
Compte-rendu :
L'IA connaît une croissance rapide et son intégration dans le domaine éducatif soulève de nombreuses questions. Aujourd'hui, nous explorerons comment les étudiants utilisent l'IA, les perceptions des enseignants à ce sujet, et les mesures possibles pour encadrer ces usages.
Constat Actuel
L'IA est de plus en plus présente dans notre quotidien, y compris dans l'éducation. Certaines universités, comme Science Po en janvier 2023, ont interdit l'utilisation de l'IA, tandis que d'autres, comme l'Université de Prague, la considèrent comme du plagiat. Cette diversité de positions souligne la nécessité urgente d'une réponse institutionnelle pour encadrer ces usages et prévenir les risques de triche et de plagiat.
Enquête Nationale
Pour mieux comprendre ces dynamiques, une enquête nationale intitulée "L'IA dans l'enseignement" a été réalisée. Les auteurs de cette enquête sont Le Sphynx (sondage) et Compilatio (fraude académique). Elle a été diffusée dans les universités de Lyon et d'Aix-Marseille entre le 21 juin et le 15 août 2023, touchant 1242 enseignants et 4443 étudiants. Les questionnaires, conçus pour étudier les usages de l'IA et les représentations de ces usages, abordaient des thèmes comme les craintes, les opportunités et l'acceptabilité.
Résultats de l'Enquête
Les résultats montrent que 55 % des étudiants utilisent l'IA de manière occasionnelle ou fréquente, contre 34 % des enseignants. Cependant, 88 % des enseignants pensent que leurs étudiants utilisent l'IA, ce qui pourrait indiquer une surestimation des usages. Les usages identifiés incluent la recherche d'informations et la rédaction de textes, bien que ces réponses ne puissent pas être cumulées dans les choix proposés.
Analyse Critique
Une analyse plus approfondie révèle que les enseignants peinent à percevoir les bénéfices de l'IA pour l'apprentissage, contrairement aux étudiants. La question de savoir si l'IA améliore les notes sans développer les compétences reste débattue. Est-ce un dopage académique ou une opportunité pour un apprentissage plus efficace ?
Acceptabilité et Éthique
L'enquête révèle que beaucoup d'étudiants jugent acceptable d'utiliser l'IA pour rédiger leurs devoirs, et même un quart des enseignants partagent cet avis. Cela pose des questions éthiques cruciales : copier-coller est-il tricher ? Utiliser l'IA sous supervision ou pour des traductions est-il acceptable ? La réponse n'est pas simple et nécessite un débat ouvert.
Propositions et Solutions
Pour encadrer ces usages, plusieurs solutions sont proposées. Plutôt que d'interdire l'IA, il est suggéré de fixer des règles pour une utilisation responsable. Des innovations pédagogiques peuvent également être explorées, comme la création de situations de concurrence professionnelle ou l'utilisation de détecteurs d'IA.
Conclusion
En conclusion, bien que l'étude présente des limites, elle souligne un besoin urgent de régulation. Une charte institutionnelle pourrait fournir un cadre pour une utilisation éthique.
Le Comptoir OCTO - Équipes infra et prod, ne ratez pas l'embarquement pour l'...OCTO Technology
par Claude Camus (Coach agile d'organisation @OCTO Technology) et Gilles Masy (Organizational Coach @OCTO Technology)
Les équipes infrastructure, sécurité, production, ou cloud, doivent consacrer du temps à la modernisation de leurs outils (automatisation, cloud, etc) et de leurs pratiques (DevOps, SRE, etc). Dans le même temps, elles doivent répondre à une avalanche croissante de demandes, tout en maintenant un niveau de qualité de service optimal.
Habitué des environnements développeurs, les transformations agiles négligent les particularités des équipes OPS. Lors de ce comptoir, nous vous partagerons notre proposition de valeur de l'agilité@OPS, qui embarquera vos équipes OPS en Classe Business (Agility), et leur fera dire : "nous ne reviendrons pas en arrière".
MongoDB in a scale-up: how to get away from a monolithic hell — MongoDB Paris...Horgix
This is the slide deck of a talk by Alexis "Horgix" Chotard and Laurentiu Capatina presented at the MongoDB Paris User Group in June 2024 about the feedback on how PayFit move away from a monolithic hell of a self-hosted MongoDB cluster to managed alternatives. Pitch below.
March 15, 2023, 6:59 AM: a MongoDB cluster collapses. Tough luck, this cluster contains 95% of user data and is absolutely vital for even minimal operation of our application. To worsen matters, this cluster is 7 years behind on versions, is not scalable, and barely observable. Furthermore, even the data model would quickly raise eyebrows: applications communicating with each other by reading/writing in the same MongoDB documents, documents reaching the maximum limit of 16MiB with hundreds of levels of nesting, and so forth. The incident will last several days and result in the loss of many users. We've seen better scenarios.
Let's explore how PayFit found itself in this hellish situation and, more importantly, how we managed to overcome it!
On the agenda: technical stabilization, untangling data models, breaking apart a Single Point of Failure (SPOF) into several elements with a more restricted blast radius, transitioning to managed services, improving internal accesses, regaining control over risky operations, and ultimately, approaching a technical migration when it impacts all development teams.
2. Simplement Impressionnant !
Vivre une expérience unique à travers cette
belle illustration du voyage à travers l'Univers
Microscopique et Macroscopique :
http://micro.magnet.fsu.edu/primer/java/sci
enceopticsu/powersof10/index.html
3. Faisons un voyage dans l’univers, en sautant les
distances de 10 en 10.
On commence avec 100 et l’équivalence de 1 mètre,
puis on augmente puissance 10 à chaque fois.
Jusqu’à la limite de notre imagination, en direction
du macrocosme.
Ensuite, on repart en arrière, jusqu’au point de
départ et de là commencer un voyage vers
l’infiniment petit : le microcosme.
Observez les lois de l’univers et réfléchissez sur
votre condition humaine...
27. 10 22
1 million d’années-lumière
Notre galaxie et
d’autres...
28. 10 23 - 10 millions d’années-lumière
L’immensité, infinie, les galaxies
ne sont que de petites choses et,
entre elles, des espaces “vides”.
Partout la même loi qui régit tous
les corps de l’univers…
On pourrait partir encore très
loin mais revenons rapidement
sur le plancher des vaches !
61. 10 -10
1 Angstrom
Apparaîssent les
“nuages” d’électrons
de l’atome de
carbone.
Tout, dans notre
monde, est ainsi fait.
Voyez la
ressemblance entre
macro et
microcosme !
62. 10 -11
10 picomètres
Dans ce monde
infiniment petit,
on peut noter les
électrons dans le
champ de
l’atome…
On dirait le ciel !
66. 10 -15
1 Femtomètre
Nous sommes dans le
domaine de
l’imagination
scientifique : face à
face avec un proton !
67. 10 -16
100 Attomètres
Examinons les
particules de
quark…
Et arrêtons-nous :
nous avons atteint
les limites des
connaissances de
la science !
68. Et maintenant ?
Vous trouvez toujours que vous êtes le
nombril du monde ?
L’aboutissement parfait de toute
création ?
Qu’il y a-t-il au-delà des limites ?
Il y a-t-il des limites ?
69. Notre voyage dans l’infiniment petit
s’est arrêté à 100 attomètres et au
quark car on n’en sait pas plus.
On aurait pu continuer... dans l’espace
aussi !
Notre imagination est sans limites…
Question : sommes-nous seuls dans
l’univers ?