LudoScience

Diffusion de nos travaux 712 références

Cette page rassemble nos écrits (scientifiques ou non) ainsi que nos participations à des conférences, ateliers et autres évènements.

a-b-a-c-a design

game-based learning

jouabilité

-

-

3

3d

3d environment

5

5g mobile communication

A

Academic education

Academie

Accelerometer

Accompagnement

Accompagnements

Acquisition de connaissances

Action

Activisme

Activity theory

Activité

Adaptation

Adaptation models

Adaptivity

Advergame

Advergames development companies

Advertainment

Advertaising tools

Advertising companies

Advertising tools

Aesthetic experience

Affacturage

Affective computing

Aide

Air traffic management

Airplanes

Algorithm design and analysis

Algorithmie

Alimentation

Allemagne

  • Jennifer Bohn, Maximilian Eibl, Arne Berger, Stefanie Müller
    "Study-Town: a Game for Cultural Awareness"
    SeriousGames '14 Proceedings of the 2014 ACM International Workshop on Serious Games Pages 51-56 ACM New York, NY, USA ©2014, 2014.
    Download

Ambient awareness

Ambient learning

Analyse

Analyse lexicométrique

Analyse activité

Analyse de traces

Analyse des compétences

Analyse lexicométrique

Analyse quantitative

Analysis

Analysis framework

Anatomy

Ancrage mémoriel

Animation

App

  • Julian Alvarez, Jean-Pierre Jessel, Gilles Methel
    "PBL and Serious Games"
    Actes du colloque "7th ALE International Workshop: Experience and Reflection on Active Learning in Engineering Education", Toulouse, Geneviève Moore, Anne Hernandez, ISBN : 978-2-87649-051-2, 2007.
    Download paper (PDF - 150ko)

Applications in subject areas

Apprendre

Apprentissage

Apprentissage collaboratif

Apprentissage de la programmation

Apprentissage multi-modal

Apprentissage par l'action

Apprentissage par le jeu

Apprentissage par problème

  • Julian Alvarez, Jean-Pierre Jessel, Gilles Methel
    "PBL and Serious Games"
    Actes du colloque "7th ALE International Workshop: Experience and Reflection on Active Learning in Engineering Education", Toulouse, Geneviève Moore, Anne Hernandez, ISBN : 978-2-87649-051-2, 2007.
    Download paper (PDF - 150ko)

Apprentissage par projet

  • Julian Alvarez, Jean-Pierre Jessel, Gilles Methel
    "PBL and Serious Games"
    Actes du colloque "7th ALE International Workshop: Experience and Reflection on Active Learning in Engineering Education", Toulouse, Geneviève Moore, Anne Hernandez, ISBN : 978-2-87649-051-2, 2007.
    Download paper (PDF - 150ko)

Apprentissages

Approche du jeu par génome

  • Duin, H., Hauge, J. B., Hunecker, F., & Thoben, K.
    "Application of Serious Games in Industrial Contexts"
    Industrial Contexts. In M. Cruz-Cunha, V. Varvalho, & P. Tavares (Eds.) Business, Technological, and Social Dimensions of Computer Games: Multidisciplinary Developments (pp. 331-347). Hershey, PA: Information Science Reference. doi:10.4018/978-1- 60960-567-4.ch020 Application of Serious Games in , 2011.
    Lien / Link

Appropriation

Arami alphabets

Architecture

Architecture d'environnement

Architecture informatique

Aref 2013

Art

Art game

Artefact

Artificial intelligence

Artificial intelligence (incl. robotics)

Assessment grid

Assistance à la conception

Atelier

Attitude ludique

Attitudinal change

Audience

Augmented reality

Augmented reality (réalité augmentée)

Authenticity

Authoring environment

Autism

Auto organisation

Auto-efficacité

Auto-organisation

Automatic knowledge extraction

Autonomy

Autorégulation

Avantages

Avatar

Avatars

Awards

Awareness

B

Bacteriology

  • Sugimura, Ryo; Kawazu, Sotaro; Tamari, Hiroki; Watanabe, Kodai; Nishimura, Yohei; Oguma, Toshiki; Watanabe, Katsushiro; Kaneko, Kosuke; Okada, Yoshihiro; Yoshida, Motofumi; Takano, Shigeru; Inoue, Hitoshi
    "Mobile Game for Learning Bacteriology"
    International Association for Development of the Information Society, Paper presented at the International Conference on Mobile Learning 2014 (10th, Madrid, Spain, Feb 28-Mar 2, 2014), 2014.
    Download

Bandes-dessinées

Banque

Base de données

Best practice

Biases

Bibliothèque

Big five

Biofeedback

Biological control systems

Biological system modeling

Biomedical ethics

Biomedical monitoring

Biosensors

Bloc opératoire

Bloom's taxonomy

Bluetooth

Board game

Bomberman x

Bpm

Brique de gameplay

Briques

Briques

  • Julian Alvarez, Damien Djaouti, Jean-Pierre Jessel, Gilles Methel, Pierre Molinier
    "Morphologie des jeux vidéo"
    Actes du colloque "H2PTM'07 (Collaborer, Echanger, Inventer : Expériences de réseaux)", Hammamet, Tunisie, Hermes science, ISBN : 978-2-7462-1891-8, Lavoisier, 2007.
    Télécharger l'article (PDF - 400ko)

Briques de gameplay

Briques gameplay

Budget

Buildings

Bulimia nervosa

Business

Business administration

Business data processing

Business game

Business games

Business management simulation game

Business process

Business process management

Business simulation games

C

Cac 40

Caméras

Carmageddon

Carmageddon tv

Cartographie

Casual game

Casual games

Charactérisation

Chaîne éditoriale scenarichain

Children

Chris crawford

Chronologie

Chômage

Cities and towns

Citizen science

  • Alexey Voinov, Nagesh Kolagani, Michael K. McCall, Pierre D. Glynn, Marit E. Kragt, Frank O. Ostermann, Suzanne A. Pierce, Palaniappan Ramu
    "Modelling with stakeholders - Next generation"
    Elsevier, Environmental Modelling & Software Volume 77, March 2016, Pages 196-220, 2016.
    Download

City

Civil defence training

Classification

Classification des jeux video

Climat motivationnel

Co design

Cognition

Cognitive rehabilitation

Cognitive stimulation

Cohérence

Coi

Collaboration

Collaborative agent-based architecture

Collaborative distance

Collaborative learning

Collaborative training

Collective memory

Collectivités territoriales

Colloque

Collège

Commerce électronique

Commitment

Communautés

Communication

Compagnon virtiel

Companies

Comparative study

Complexité

Comportements informationnels

Composante ludique

Computer gaming

Computer science

Computer-based training

Computer-supported design

Computers

Computers and education

Compétition

Concentration

Concept

Conception

Conception pédagogique

Concepts

Concours

Conduite au changement

Conferences

Conflit instrumental

Connaissance

Conscience de la situation

Console

Consommateur

Constructivist psychocognitive theories

  • Houda Mouaheb, Ahmed Fahli, Mohammed Moussetad, Said Eljamali
    "The Serious Game: What Educational Benefits?"
    Procedia - Social and Behavioral Sciences Volume 46, 2012, Pages 5502-5508 4th WORLD CONFERENCE ON EDUCATIONAL SCIENCES (WCES-2012) 02-05 February 2012 Barcelona, Spain, 2012.
    Download

Content implementation

Controlled natural language

Convivialité

Coopération

Corps

Correlational study

Costs

Counsels

Coût

Creation

Creativity

Creativité

Crisis management

Crisis management training

Critical theory

Critique

Cross-cultural

Crowdsourcing

  • Alexey Voinov, Nagesh Kolagani, Michael K. McCall, Pierre D. Glynn, Marit E. Kragt, Frank O. Ostermann, Suzanne A. Pierce, Palaniappan Ramu
    "Modelling with stakeholders - Next generation"
    Elsevier, Environmental Modelling & Software Volume 77, March 2016, Pages 196-220, 2016.
    Download

Création

Créativité

Cultural differences

Cultural heritage

Cultural heritage

Cultural heritage (héritage culturel)

Cultural resources

Culture

Culture numérique

Culture of memory

Customer loyalty

Cyber security

Cyberbullying

Cycle de vie de l'organisation

  • Duin, H., Hauge, J. B., Hunecker, F., & Thoben, K.
    "Application of Serious Games in Industrial Contexts"
    Industrial Contexts. In M. Cruz-Cunha, V. Varvalho, & P. Tavares (Eds.) Business, Technological, and Social Dimensions of Computer Games: Multidisciplinary Developments (pp. 331-347). Hershey, PA: Information Science Reference. doi:10.4018/978-1- 60960-567-4.ch020 Application of Serious Games in , 2011.
    Lien / Link

D

Data

Data collections

Data exploration

Data modeling learning

Data powered collective intelligence and action

  • David Osimo, Katarzyna Szkuta, Stefano Armenia, Fenareti Lampathaki, Sotiris Koussouris, Spiros Mouzakitis, Yannis Charalabidis, Dimitris Askounis, Melanie Bicking, Gianluca Misuraca, Roberto Pizzicannella
    "CROSSROAD project"
    ICT-2009.7.3 ICT for Governance and Policy Modelling FP7-ICT-2009-4 Support Action (SA) Project, 2010.
    Lien / Link

Datagame

Decision making

Decision trees

Decision-making

Definition

Dermatology

Description grid

Design

Design de jeux vidéo

Design game

Design support

Design thinking

Design-based research

Designers

Development

Development kits

Dewey

Diabetes

Dialogue humain-machine

Didactique

Didactique des mathématiques

Diffusion

Digital circuit course

Digital collaborative environment

Digital educational games (deg)

Digital game

Digital game development

Digital game-based learning

Digital games

Digital serious game

Digital serious games

Diplôme

Discussion forums

Diseases

Dispositif formation

Dispositifs

Distributed data

Documentaire

Domain specific modeling language

Dossier

Dynamic

Débat

Décrochage

Défense

Définition

Détournement

Détournement de jeux

Développement

Développement

Développement logiciel

Développeurs

E

E-commerce

E-formation

E-health

E-learning

E-mental health

E-santé

E-sport

E-training

Eating disorders

Echange étudiants

  • Jennifer Bohn, Maximilian Eibl, Arne Berger, Stefanie Müller
    "Study-Town: a Game for Cultural Awareness"
    SeriousGames '14 Proceedings of the 2014 ACM International Workshop on Serious Games Pages 51-56 ACM New York, NY, USA ©2014, 2014.
    Download

Echec scolaire

Ecole

Ecoles

Ecologie

Economics

Economie

Ecosystem

Ecosystème

Ecrans

Ecriture

Edgeware

Education

Educational board games

Educational business game

Educational contents

  • Ryo Sugimura, Hiroki Tamari, Hiromi Kitaguchi, Sotaro Kawatsu, Kaiki Oya, Yuya Ono, Kosuke Kaneko, Saki Nakazono, Yoshihiro Okada, Motofumi Yoshida, Yukiko Kono
    "Serious Games for Education and Their Effectiveness for Higher Education Medical Students and for Junior High School Students"
    International Journal of Information Technology & Computer Science ( IJITCS ) ( http://www.ijitcs.com ) (ISSN : 2091-1610 ) on volume No : 19 , Issue No : 1 , 2015.
    Download
  • Sugimura, Ryo; Kawazu, Sotaro; Tamari, Hiroki; Watanabe, Kodai; Nishimura, Yohei; Oguma, Toshiki; Watanabe, Katsushiro; Kaneko, Kosuke; Okada, Yoshihiro; Yoshida, Motofumi; Takano, Shigeru; Inoue, Hitoshi
    "Mobile Game for Learning Bacteriology"
    International Association for Development of the Information Society, Paper presented at the International Conference on Mobile Learning 2014 (10th, Madrid, Spain, Feb 28-Mar 2, 2014), 2014.
    Download

Educational game

Educational game design checklist

Educational game design framework

Educational game development

Educational games

Educational games for children

Educational games in sweden

Educational innovation

Educational institutions

Educational serious games

Educational standards

Educational video games

Edugame

Edugaming

Edumarket game

Edutainment

Edutainment game

Effectiveness

  • Esther Kuindersma , Jelke van der Pal, Jaap van den Herik, Aske Plaat
    "Voluntary Play in Serious Games"
    Games and Learning Alliance Volume 9599 of the series Lecture Notes in Computer Science pp 131-140, Springer, 2016.
    Download

Ehealth

Eiah

Elderly

Elderly health care

Electrodermal activity

Electroencephalogram

Emergence

Emergent learning

Emotion

Emotion/affect

Emotions

Emotions in hci

Empathy

Emploi

Enaction

Encadrement

Engagement

Engagement utilisateur

Engagés

Engines

Enjoyment

Enseignant

Enseignement

Enseignement des systèmes d'informations (si)

Enseignement numérique

Enseignements

Enseigner

Enterprise systems

Entertainment

Entertainment industry

Entertainment systems

Entrepreneurial learning

  • Rachid Lamrani , El Hassan Abdelwahed, Souad Chraibi, Sara Qassimi, Meriem Hafidi, Abdelaziz El Amrani
    "Serious Game to Enhance and Promote Youth Entrepreneurship"
    Europe and MENA Cooperation Advances in Information and Communication Technologies Volume 520 of the series Advances in Intelligent Systems and Computing pp 77-85, Springer, 2016.
    Download

Entrepreneurship education

  • Rachid Lamrani , El Hassan Abdelwahed, Souad Chraibi, Sara Qassimi, Meriem Hafidi, Abdelaziz El Amrani
    "Serious Game to Enhance and Promote Youth Entrepreneurship"
    Europe and MENA Cooperation Advances in Information and Communication Technologies Volume 520 of the series Advances in Intelligent Systems and Computing pp 77-85, Springer, 2016.
    Download

Entreprise

Entreprises

Environnement virtuel

Environnements réflexifs

Environnements virtuels informes

Erreurs médicale

Espace

Esprit critique

Estime de soi

Etat de flow

Etat de l'art

Ethical evaluation

Ethique professionnelle

Ethnométhodologie

Etudes urbaines

European parliament

Evaluation

Evaluation individualisze

Evaluation methods and techniques

Evolution

Evolutions

Exemple

Exemples

Exergames

Experiential service platform

Experiment

Experimental design

Experimentation

Expression

Expérience de jeu

Expérimentation

Eyetracking

F

Faa

Facet analysis

Facial emotion recognition

Facial ex-pression recognition

Feedback

Fiction

Fictional immersion

Financements

Finances

Flow

Fonctions

Fonctions utilitaires

Football (soccer)

Formalism

Formalisme

Formation

Formation aux déplacements

Formation des adultes

Formation professionnelle

Formation à distance

Formatting

Forum de discussion

Framework

Free to play

Freedom of choice

  • Esther Kuindersma , Jelke van der Pal, Jaap van den Herik, Aske Plaat
    "Voluntary Play in Serious Games"
    Games and Learning Alliance Volume 9599 of the series Lecture Notes in Computer Science pp 131-140, Springer, 2016.
    Download

Fun architecture

Fun food

G

Game

Game analytics

  • Manuel Freire, Ángel Serrano-Laguna, Borja Manero Iglesias, Iván Martínez-Ortiz, Pablo Moreno-Ger, Baltasar Fernández-Manjón
    "Game Learning Analytics: Learning Analytics for Serious Games"
    Living Reference Work Entry Learning, Design, and Technology pp 1-29, Springer, 2016.
    Download
  • Christian Sebastian Loh (Southern Illinois University), Yanyan Sheng (Southern Illinois University), Dirk Ifenthaler (University of Mannheim)
    "SERIOUS GAMES ANALYTICS: THEORETICAL FRAMEWORK"
    In C. S. Loh, Y. Sheng, & D. Ifenthaler (Eds). Serious Games Analytics: Methodologies for Performance Measurement, Assessment, and Improvement. New York, NY: Springer. [Chapter 1], 2015.
    Download

Game based learning

Game components

Game creation toolkits

Game design

Game design competition

Game development kits

Game development life cycle

Game development methodology

Game development processes

Game development workflows

Game elements-attributes model (geam)

Game engine

Game evaluation

Game jam

Game learning analytics

Game level design

Game mechanics

Game one

Game settings

Game software quality evaluation

Game-based learning

Game-based learning model

  • Mariya Gachkova, Elena Somova
    "Game-based Approach in e-Learning"
    Institute of Mathematics and Informatics Bulgarian Academy of Sciences, Association for the Development of the Information Society - Proceedings of the National Conference on "Education and Research in the Information Society", Plovdiv, May, 2016, 143p-152p, 2016.
    Download

Game-based training

Gameplay

Games

Games design

Games for health

Games for social change

Gamification

Gamification element

Gaming

Gaming 2.0

Gaming aspects

Gaming experience

Gaming styles

Gamplay

Gbls

Genre

Genre jeu vidéo

Geste médical

Gestion

Gestion d'entreprise

Gestion de crise

Gesture-based interaction

Gestures

Global game jam

Goal orientation

Government service utility

  • David Osimo, Katarzyna Szkuta, Stefano Armenia, Fenareti Lampathaki, Sotiris Koussouris, Spiros Mouzakitis, Yannis Charalabidis, Dimitris Askounis, Melanie Bicking, Gianluca Misuraca, Roberto Pizzicannella
    "CROSSROAD project"
    ICT-2009.7.3 ICT for Governance and Policy Modelling FP7-ICT-2009-4 Support Action (SA) Project, 2010.
    Lien / Link

Governmentality

Gps

Grand challenges

  • David Osimo, Katarzyna Szkuta, Stefano Armenia, Fenareti Lampathaki, Sotiris Koussouris, Spiros Mouzakitis, Yannis Charalabidis, Dimitris Askounis, Melanie Bicking, Gianluca Misuraca, Roberto Pizzicannella
    "CROSSROAD project"
    ICT-2009.7.3 ICT for Governance and Policy Modelling FP7-ICT-2009-4 Support Action (SA) Project, 2010.
    Lien / Link

Grands groupes

Graphical notation

Graphics

Grille

Guide

Gynecology

Génie mécanique

Health

Health game

Health games

Health technology

Healthcare

Histoire

Histoire du jeu vidéo

Histoire du serious game

History

How to learn

Html5

Human factors

Human performance assessment

  • Christian Sebastian Loh (Southern Illinois University), Yanyan Sheng (Southern Illinois University), Dirk Ifenthaler (University of Mannheim)
    "SERIOUS GAMES ANALYTICS: THEORETICAL FRAMEWORK"
    In C. S. Loh, Y. Sheng, & D. Ifenthaler (Eds). Serious Games Analytics: Methodologies for Performance Measurement, Assessment, and Improvement. New York, NY: Springer. [Chapter 1], 2015.
    Download

Human resources

Human-computer interaction

Hypermédia

Héritage culturel

Héritage culturel (cultural heritage)

Hôpital

I

Ict efficiency

Idea assessment

Image processing

Image processing and computer vision

Imaginaire

Immersion

Impact

Implementation process

Implémentation

Improductif

Impulsivity

In-game advertising

Incapacités intellectuelles

Indoor

Industrie

Industrie vidéoludique

Industries

Industries culturelles

Information

Information systems

Ingénierie

Ingénierie pédagogique

Initiation

Initiative

Injuries

Innov8

Innovation

Innovation minitrack

Innovation pédagogique

Input devices

Insertion

Instructional design

Instructional game design

Instructional technology

Intelligence artificielle

Intelligence artificielle (ia)

Intelligent agent

Intelligent tutoring systems

Intentionnalité

Interaction

Interaction design

Interactive cultural exhibition

  • Chairi Kiourt, Anestis Koutsoudis, Stella Markantonatou, George Pavlidis
    "THE ?SYNTHESIS? VIRTUAL MUSEUM"
    Mediterranean Archaeology and Archaeometry, Vol. 16, No 5,(2016), pp. 1-9, Greece, 2016.
    Lien / Link

Interactive learning environments

Interactivité

Interface

International

Interview

Interviews

Inter­professional collaboration

Intrinsic motivation

  • Houda Mouaheb, Ahmed Fahli, Mohammed Moussetad, Said Eljamali
    "The Serious Game: What Educational Benefits?"
    Procedia - Social and Behavioral Sciences Volume 46, 2012, Pages 5502-5508 4th WORLD CONFERENCE ON EDUCATIONAL SCIENCES (WCES-2012) 02-05 February 2012 Barcelona, Spain, 2012.
    Download

Introduction

Intégration

Intérêt

Iron

Is learning

Iterative design

J

Javascript

Jeu

Jeu casual

Jeu de rôle

Jeu de simulation

Jeu de société

Jeu en ligne

Jeu pédagogique

Jeu sérieux

Jeu video

Jeu vidéo

Jeunesse

Jeux

Jeux dangereux

Jeux de société

Jeux du web

Jeux en ligne

Jeux numériques

Jeux numériques éducatifs

Jeux pour enfants

Jeux serieux

Jeux sociaux

Jeux sérieux

Jeux thérapeutiques

Jeux vidéo

Jeux vidéo thérapeutiques

Jeux éducatifs

Jeuxvideo.com

Jouabilité

Jouet sérieux

Joueur instrumental

Journalisme

Jury

Jáchym topol

K

Kalisto

Kinect

Kinect sensor

Kinésithérapie

Knowledge

Knowledge engineering

Korean language

Korean learning

Korean wave

Kurdish language

L

Laboratoire

Langue naturelle

Langues

Large companies

Learner assessment

Learner behaviors

Learning

Learning analytics

  • Manuel Freire, Ángel Serrano-Laguna, Borja Manero Iglesias, Iván Martínez-Ortiz, Pablo Moreno-Ger, Baltasar Fernández-Manjón
    "Game Learning Analytics: Learning Analytics for Serious Games"
    Living Reference Work Entry Learning, Design, and Technology pp 1-29, Springer, 2016.
    Download
  • Christian Sebastian Loh (Southern Illinois University), Yanyan Sheng (Southern Illinois University), Dirk Ifenthaler (University of Mannheim)
    "SERIOUS GAMES ANALYTICS: THEORETICAL FRAMEWORK"
    In C. S. Loh, Y. Sheng, & D. Ifenthaler (Eds). Serious Games Analytics: Methodologies for Performance Measurement, Assessment, and Improvement. New York, NY: Springer. [Chapter 1], 2015.
    Download

Learning assessment

Learning effect

Learning experience

Learning from games

Learning game

Learning game 2.0

Learning games

Learning mechanics

Learning path

Learning process

Learning programming

Learning scenarios

Learning video game

Learning-scenario design

Learnstrument

Legend

Lego

Level design

Libraries archives

Library

Limite

Limites

Little big planet

Littérature

Living lab

Localization

Logiciel libre

Logistic regression model

Logo

Longlife learning

Ludicisation

Ludification

Ludification adaptative

Ludo-pédagogie

Ludo-éducatif

Ludopédagogie

Ludothèque

M

Magic surrealism

Management

Management interculturel

Mandatory play

Mapping

Marché

Marchés

Market research

Marketing

Material discourse analysis

Maternelle

Maths

Mathématiques

Media archaeology

Medical computing

Medical education

Medical ethics

Medical games

Medical training

Medical treatment

Mental training

Merci dorian

Message

Methode

Methodes

Metonymy

Microscope

Microéconomie

Middle school science

Militaire

Militants

Military making-decision

Military teaching

Minimally invasive surgery

Mise en abyme

Mit

Mixers

Mmog-s (massively multiplayer on-line games)

  • Jaak Henno
    "On structure of games"
    Proceedings of the 2010 conference on Information Modelling and Knowledge, Information Modelling and Knowledge Bases XXI, 2010, vol. 206, p. 344., 2010.
    Lien / Link

Mmorpg

Mobile

Mobile learning

Modding

Modding game

Model

Model-based collaborative governance

  • David Osimo, Katarzyna Szkuta, Stefano Armenia, Fenareti Lampathaki, Sotiris Koussouris, Spiros Mouzakitis, Yannis Charalabidis, Dimitris Askounis, Melanie Bicking, Gianluca Misuraca, Roberto Pizzicannella
    "CROSSROAD project"
    ICT-2009.7.3 ICT for Governance and Policy Modelling FP7-ICT-2009-4 Support Action (SA) Project, 2010.
    Lien / Link

Model-driven authoring

Modeling

Models

Mods

Modèle

Modèle de conception

Modèle formel

Modèle évaluatif

Modèles

Modèles économiques

Modélisation

Monde virtuel

Monde-virtuel

Monitoring

Montpellier

Mooc

Morphologie

Moteurs de jeux

Motivation

Multi-agent simulation

Multi-agent system

Multiagent integration architecture

Multijoueur

Multimodal metaphor

Multimodal metaphorical scenario chain reaction

Multimédia

Musée

Mécanique de jeux

Médecin

Médecine

Média interactif

Médiathèque

Médiation

Médiation culturelle

Métalepse

Métaphore

Méthode

Méthode cas

Méthode d'évaluation

Méthode expérimentale

Méthodes

Méthodologie

Métiers