Helder Coelho
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- BWSS '10: Proceedings of the 2010 Second Brazilian Workshop on Social Simulation (5)
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- IAT '05: Proceedings of the IEEE/WIC/ACM International Conference on Intelligent Agent Technology (1)
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- Article
Bringing Underused Learning Objects to the Light: A Multi-agent Based Approach
- André Behr
NIDeS and FCT, University of the Azores, Ponta Delgada, Portugal
, - José Cascalho
NIDeS and FCT, University of the Azores, Ponta Delgada, Portugal
GRIA and LIACC, Ponta Delgada, Portugal
, - Armando Mendes
NIDeS and FCT, University of the Azores, Ponta Delgada, Portugal
GRIA and LIACC, Ponta Delgada, Portugal
, - Hélia Guerra
NIDeS and FCT, University of the Azores, Ponta Delgada, Portugal
Centro Algoritmi, University of Minho, Braga, Portugal
, - Luis Cavique
Open University, Lisbon, Portugal
LASIGE, University of Lisbon, Lisbon, Portugal
, - Paulo Trigo
ISEL, Lisbon, Portugal
GuIAA, Lisbon, Portugal
, - Helder Coelho
ULisbon, Lisbon, Portugal
, - Rosa Vicari
Informatics Institute, UFRGS, Porto Alegre, Brazil
Progress in Artificial Intelligence•August 2022, pp 751-763• https://doi.org/10.1007/978-3-031-16474-3_61AbstractThe digital learning transformation brings the extension of the traditional libraries to online repositories. Learning object repositories are employed to deliver several functionalities related to the learning object’s lifecycle. However, these ...
- 0Citation
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- André Behr
- Article
On Developing Ethical AI
- Helder Coelho
LASIGE, Mind-Brain College, Lisbon University, Lisbon, Portugal
Progress in Artificial Intelligence•August 2022, pp 512-521• https://doi.org/10.1007/978-3-031-16474-3_42AbstractTechnologies such as Artificial Intelligence (Analytics and Automation) can harm purposely persons (via fake news of social networks, drones, robots, apps, platforms) without any available regulations and forms of protection. We need not only ...
- 0Citation
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- Helder Coelho
- Article
Reflections on Social Simulation and Complexity
- Helder Coelho
MAS-BioISI and Mind-Brain College, FC, ULisbon, Lisbon, Portugal
Progress in Artificial Intelligence•September 2019, pp 633-641• https://doi.org/10.1007/978-3-030-30244-3_52AbstractAfter the involvement with a huge collection of case studies, where the experimentation may distinguish between luck and skill, our motivation was directed to see how agent-based modeling and model thinking were applied to general problem solving ...
- 0Citation
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- Helder Coelho
- Article
Legal Implications of Autonomous Vehicles: What We Know So Far and What’s Left to Work On
- Beatriz Assunção Ribeiro
Cognitive Science, University of Lisbon, Lisbon, Portugal
, - Hélder Coelho
Computation Department, University of Lisbon, Lisbon, Portugal
, - Ana Elisabete Ferreira
Law, University of Coimbra, Coimbra, Portugal
, - João Branquinho
Philosophy Department, University of Lisbon, Lisbon, Portugal
Progress in Artificial Intelligence•September 2019, pp 287-298• https://doi.org/10.1007/978-3-030-30241-2_25AbstractAutonomous Vehicles (AVs), from autonomy level 3 to 5 are expected to enter the EU market within a year and our infrastructures, as well as legal and social systems are hardly prepared to deal with this technology, which continues to advance ...
- 1Citation
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- Beatriz Assunção Ribeiro
- article
On Legitimacy Feedback Mechanisms in Agent-Based Modeling of Civil Violence
- Carlos Lemos,
- Rui Jorge Lopes,
- Helder Coelho
BioISI and Faculdade de Ciências da Universidade de Lisboa, Lisbon, Portugal
International Journal of Intelligent Systems, Volume 31, Issue 2•February 2016, pp 106-127 • https://doi.org/10.1002/int.21747Epstein's agent-based model ABM of civil violence has been very popular and successful due to its formulation soundness, simplicity, and explanatory power. Variants of this model have been proposed for the simulation of different types of social conflict ...
- 1Citation
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- Article
A Framework for Agent-Based Electricity Markets: Preliminary Report
DEXA '15: Proceedings of the 2015 26th International Workshop on Database and Expert Systems Applications (DEXA)•September 2015, pp 57-61• https://doi.org/10.1109/DEXA.2015.30The electricity industry has evolved to open marketsthat promote competition among suppliers and provide consumers with a choice of services. Most energy markets (EMs) were, however, designed without the notion that a significant part of the traded ...
- 0Citation
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- Article
An evolutionary spatial game-based approach for the self-regulation of social exchanges in MAS
- Luís F. K. Macedo
Universidade Federal do Rio Grande, Brazil
, - Graçaliz P. Dimuro
Universidade Federal do Rio Grande, Brazil
, - Marilton S. Aguiar
Universidade Federal de Pelotas, Brazil
, - Helder Coelho
Universidade de Lisboa, Portugal
ECAI'14: Proceedings of the Twenty-first European Conference on Artificial Intelligence•August 2014, pp 573-578An open problem in social simulation and MAS applications is the self-regulation of social exchange processes, aiming at the achievement/maintenance of equilibrated exchanges by the agents themselves, providing the continuation of the interactions in ...
- 0Citation
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- Luís F. K. Macedo
- research-article
The geometry of desire
- Luis Antunes
University of Lisbon, Lisbon, Portugal
, - Davide Nunes
University of Lisbon, Lisbon, Portugal
, - Helder Coelho
University of Lisbon, Lisbon, Portugal
AAMAS '14: Proceedings of the 2014 international conference on Autonomous agents and multi-agent systems•May 2014, pp 1169-1172In the BDI paradigm, much attention was devoted to beliefs, intentions, choice and commitment, whereas desire has traditionally been seen as given. However, desire is the key connection to the agents' creator, and the ultimate source of behaviour. ...
- 0Citation
- 79
- Downloads
MetricsTotal Citations0Total Downloads79Last 12 Months2
- Luis Antunes
Interdisciplinary Applications of Agent-Based Social Simulation and Modeling
Social simulation can be a difficult discipline to encompass fully. There are many methods, models, directions, and theories that can be discussed and applied to various social sciences. Anthropology, sociology, political science, economy, government, ...
- 1Citation
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- Article
Agent-Based Simulation of Retail Electricity Markets: Bilateral Trading Players
DEXA '13: Proceedings of the 2013 24th International Workshop on Database and Expert Systems Applications•August 2013, pp 189-193• https://doi.org/10.1109/DEXA.2013.50The electricity industry throughout the world, which has long been dominated by vertically integrated utilities, has experienced major changes. Deregulation, unbundling, wholesale and retail wheeling, and real-time pricing were abstract concepts a few ...
- 0Citation
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- Article
Negotiating Hour-Wise Tariffs in Multi-Agent Electricity Markets
- Fernando Lopes
LNEG-National Research Institute, Lisbon, Portugal
, - Hugo Algarvio
LNEG-National Research Institute, Lisbon, Portugal
, - Helder Coelho
University of Lisbon, Lisbon, Portugal
HoloMAS 2013: Proceedings of the 6th International Conference on Industrial Applications of Holonic and Multi-Agent Systems - Volume 8062•August 2013, pp 246-256• https://doi.org/10.1007/978-3-642-40090-2_22Electricity markets EMs are a constantly evolving reality, since both market players and market rules are constantly changing. Two major market models have been considered: pools and bilateral transactions. Pool prices tend to change quickly and ...
- 0Citation
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- Fernando Lopes
- Article
Replicating Hofstede's Cultured Negotiation: A First Update
BWSS '12: Proceedings of the 2012 Third Brazilian Workshop on Social Simulation•October 2012, pp 120-127• https://doi.org/10.1109/BWSS.2012.29Hofstede et al. cultured negotiating agents simulation produced realistic behavior by incorporating Hofstede's dimensional model of culture in the agent's negotiation protocol and overall behavior. Given such a promising model to generate actual human-...
- 0Citation
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- Article
Social Simulation, Seeing Ahead
BWSS '12: Proceedings of the 2012 Third Brazilian Workshop on Social Simulation•October 2012, pp 15-17• https://doi.org/10.1109/BWSS.2012.27The present paper introduces the aims of the BWSS-2012 Panel on scanning the future by looking to the tendencies of Computation and Complexity Sciences, namely Agents and Artificial Intelligence, in order to situate the power of current Social ...
- 0Citation
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- Article
Analyzing the Evolution of Social Exchange Strategies in Social Preference-Based MAS through an Evolutionary Spatial Approach of the Ultimatum Game
- Luis F. K. Macedo,
- Gracaliz P. Dimuro,
- Marilton S. Aguiar,
- Antonio C. R. Costa,
- Viviane L. D. Mattos,
- Helder Coelho
BWSS '12: Proceedings of the 2012 Third Brazilian Workshop on Social Simulation•October 2012, pp 83-90• https://doi.org/10.1109/BWSS.2012.26This paper presents a multiagent-based approach of an evolutionary and spatial version of the Ultimatum Game interpreted as Game of Social Exchange Processes, where the agents organized in a complex network evolve their exchange strategies considering ...
- 1Citation
MetricsTotal Citations1
- Article
Concession Strategies for Negotiating Bilateral Contracts in Multi-agent Electricity Markets
DEXA '12: Proceedings of the 2012 23rd International Workshop on Database and Expert Systems Applications•September 2012, pp 321-325• https://doi.org/10.1109/DEXA.2012.24Electricity markets are systems for effecting the purchase and sale of electricity using supply and demand to set energy prices. Market participants are commonly exposed to financial risks, particularly high price volatility. This article addresses the ...
- 1Citation
MetricsTotal Citations1
- Article
Moral minds as multiple-layer organizations
- Helder Coelho
LabMAg, Faculdade de Ciências da Universidade de Lisboa, Lisboa, Portugal
, - António Carlos Da Rocha Costa
C3, PPGMC, Universidade Federal do Rio Grande, Rio Grande, RS, Brazil
, - Paulo Trigo
LabMAg, Instituto Superior de Eng. de Lisboa, DEETC, Lisboa, Portugal
IBERAMIA'10: Proceedings of the 12th Ibero-American conference on Advances in artificial intelligence•November 2010, pp 254-263The design of a moral decision apparatus is always associated with the appropriate definition of the set of qualities and virtues of an agent which emerge from their feelings and desires. But, there are much more elements along the process of moral ...
- 0Citation
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- Helder Coelho
- Article
Simulating Argumentation about Exchange Values in Multi-agent Interactions
BWSS '10: Proceedings of the 2010 Second Brazilian Workshop on Social Simulation•October 2010, pp 103-110• https://doi.org/10.1109/BWSS.2010.29This article presents two dialogue protocols to support argumentation about the exchange values involved in multi-agent interactions. In this work, we adopt Piaget's theory of social exchanges, where interaction is seen as an exchange of services ...
- 0Citation
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- Article
Rehearsing Policies for GHGs Emission Control
BWSS '10: Proceedings of the 2010 Second Brazilian Workshop on Social Simulation•October 2010, pp 127-130• https://doi.org/10.1109/BWSS.2010.28We propose the use of a multiagent-based social simulation approach to help decision makers in their task of choosing the best policy/decision when facing complex scenarios. We show how we can use MABS tools an techniques to experiment/rehearse with ...
- 0Citation
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- Article
Simulation of Electrical Distributed Energy Resources for Electrical Vehicles Charging Process Strategy
BWSS '10: Proceedings of the 2010 Second Brazilian Workshop on Social Simulation•October 2010, pp 82-89• https://doi.org/10.1109/BWSS.2010.15This paper presents a simulation platform for control and monitor the Electric Vehicle charging process, based on existing power distribution limitations and Micro generation capacity. The goal of this research is to simulate the energy consumption and ...
- 0Citation
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- Article
Simulating a Multi-agent Electricity Market
BWSS '10: Proceedings of the 2010 Second Brazilian Workshop on Social Simulation•October 2010, pp 90-95• https://doi.org/10.1109/BWSS.2010.14This paper proposes a multi-agent based simulation (MABS) framework to construct an artificial electric power market populated with learning agents. The proposed frame-work facilitates the integration of two MABS constructs: i) the design of the ...
- 0Citation
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Author Profile Pages
- Description: The Author Profile Page initially collects all the professional information known about authors from the publications record as known by the ACM bibliographic database, the Guide. Coverage of ACM publications is comprehensive from the 1950's. Coverage of other publishers generally starts in the mid 1980's. The Author Profile Page supplies a quick snapshot of an author's contribution to the field and some rudimentary measures of influence upon it. Over time, the contents of the Author Profile page may expand at the direction of the community.
Please see the following 2007 Turing Award winners' profiles as examples: - History: Disambiguation of author names is of course required for precise identification of all the works, and only those works, by a unique individual. Of equal importance to ACM, author name normalization is also one critical prerequisite to building accurate citation and download statistics. For the past several years, ACM has worked to normalize author names, expand reference capture, and gather detailed usage statistics, all intended to provide the community with a robust set of publication metrics. The Author Profile Pages reveal the first result of these efforts.
- Normalization: ACM uses normalization algorithms to weigh several types of evidence for merging and splitting names.
These include:- co-authors: if we have two names and cannot disambiguate them based on name alone, then we see if they have a co-author in common. If so, this weighs towards the two names being the same person.
- affiliations: names in common with same affiliation weighs toward the two names being the same person.
- publication title: names in common whose works are published in same journal weighs toward the two names being the same person.
- keywords: names in common whose works address the same subject matter as determined from title and keywords, weigh toward being the same person.
The more conservative the merging algorithms, the more bits of evidence are required before a merge is made, resulting in greater precision but lower recall of works for a given Author Profile. Many bibliographic records have only author initials. Many names lack affiliations. With very common family names, typical in Asia, more liberal algorithms result in mistaken merges.
Automatic normalization of author names is not exact. Hence it is clear that manual intervention based on human knowledge is required to perfect algorithmic results. ACM is meeting this challenge, continuing to work to improve the automated merges by tweaking the weighting of the evidence in light of experience.
- Bibliometrics: In 1926, Alfred Lotka formulated his power law (known as Lotka's Law) describing the frequency of publication by authors in a given field. According to this bibliometric law of scientific productivity, only a very small percentage (~6%) of authors in a field will produce more than 10 articles while the majority (perhaps 60%) will have but a single article published. With ACM's first cut at author name normalization in place, the distribution of our authors with 1, 2, 3..n publications does not match Lotka's Law precisely, but neither is the distribution curve far off. For a definition of ACM's first set of publication statistics, see Bibliometrics
- Future Direction:
The initial release of the Author Edit Screen is open to anyone in the community with an ACM account, but it is limited to personal information. An author's photograph, a Home Page URL, and an email may be added, deleted or edited. Changes are reviewed before they are made available on the live site.
ACM will expand this edit facility to accommodate more types of data and facilitate ease of community participation with appropriate safeguards. In particular, authors or members of the community will be able to indicate works in their profile that do not belong there and merge others that do belong but are currently missing.
A direct search interface for Author Profiles will be built.
An institutional view of works emerging from their faculty and researchers will be provided along with a relevant set of metrics.
It is possible, too, that the Author Profile page may evolve to allow interested authors to upload unpublished professional materials to an area available for search and free educational use, but distinct from the ACM Digital Library proper. It is hard to predict what shape such an area for user-generated content may take, but it carries interesting potential for input from the community.
Bibliometrics
The ACM DL is a comprehensive repository of publications from the entire field of computing.
It is ACM's intention to make the derivation of any publication statistics it generates clear to the user.
- Average citations per article = The total Citation Count divided by the total Publication Count.
- Citation Count = cumulative total number of times all authored works by this author were cited by other works within ACM's bibliographic database. Almost all reference lists in articles published by ACM have been captured. References lists from other publishers are less well-represented in the database. Unresolved references are not included in the Citation Count. The Citation Count is citations TO any type of work, but the references counted are only FROM journal and proceedings articles. Reference lists from books, dissertations, and technical reports have not generally been captured in the database. (Citation Counts for individual works are displayed with the individual record listed on the Author Page.)
- Publication Count = all works of any genre within the universe of ACM's bibliographic database of computing literature of which this person was an author. Works where the person has role as editor, advisor, chair, etc. are listed on the page but are not part of the Publication Count.
- Publication Years = the span from the earliest year of publication on a work by this author to the most recent year of publication of a work by this author captured within the ACM bibliographic database of computing literature (The ACM Guide to Computing Literature, also known as "the Guide".
- Available for download = the total number of works by this author whose full texts may be downloaded from an ACM full-text article server. Downloads from external full-text sources linked to from within the ACM bibliographic space are not counted as 'available for download'.
- Average downloads per article = The total number of cumulative downloads divided by the number of articles (including multimedia objects) available for download from ACM's servers.
- Downloads (cumulative) = The cumulative number of times all works by this author have been downloaded from an ACM full-text article server since the downloads were first counted in May 2003. The counts displayed are updated monthly and are therefore 0-31 days behind the current date. Robotic activity is scrubbed from the download statistics.
- Downloads (12 months) = The cumulative number of times all works by this author have been downloaded from an ACM full-text article server over the last 12-month period for which statistics are available. The counts displayed are usually 1-2 weeks behind the current date. (12-month download counts for individual works are displayed with the individual record.)
- Downloads (6 weeks) = The cumulative number of times all works by this author have been downloaded from an ACM full-text article server over the last 6-week period for which statistics are available. The counts displayed are usually 1-2 weeks behind the current date. (6-week download counts for individual works are displayed with the individual record.)
ACM Author-Izer Service
Summary Description
ACM Author-Izer is a unique service that enables ACM authors to generate and post links on both their homepage and institutional repository for visitors to download the definitive version of their articles from the ACM Digital Library at no charge.
Downloads from these sites are captured in official ACM statistics, improving the accuracy of usage and impact measurements. Consistently linking to definitive version of ACM articles should reduce user confusion over article versioning.
ACM Author-Izer also extends ACM’s reputation as an innovative “Green Path” publisher, making ACM one of the first publishers of scholarly works to offer this model to its authors.
To access ACM Author-Izer, authors need to establish a free ACM web account. Should authors change institutions or sites, they can utilize the new ACM service to disable old links and re-authorize new links for free downloads from a different site.
How ACM Author-Izer Works
Authors may post ACM Author-Izer links in their own bibliographies maintained on their website and their own institution’s repository. The links take visitors to your page directly to the definitive version of individual articles inside the ACM Digital Library to download these articles for free.
The Service can be applied to all the articles you have ever published with ACM.
Depending on your previous activities within the ACM DL, you may need to take up to three steps to use ACM Author-Izer.
For authors who do not have a free ACM Web Account:
- Go to the ACM DL http://dl.acm.org/ and click SIGN UP. Once your account is established, proceed to next step.
For authors who have an ACM web account, but have not edited their ACM Author Profile page:
- Sign in to your ACM web account and go to your Author Profile page. Click "Add personal information" and add photograph, homepage address, etc. Click ADD AUTHOR INFORMATION to submit change. Once you receive email notification that your changes were accepted, you may utilize ACM Author-izer.
For authors who have an account and have already edited their Profile Page:
- Sign in to your ACM web account, go to your Author Profile page in the Digital Library, look for the ACM Author-izer link below each ACM published article, and begin the authorization process. If you have published many ACM articles, you may find a batch Authorization process useful. It is labeled: "Export as: ACM Author-Izer Service"
ACM Author-Izer also provides code snippets for authors to display download and citation statistics for each “authorized” article on their personal pages. Downloads from these pages are captured in official ACM statistics, improving the accuracy of usage and impact measurements. Consistently linking to the definitive version of ACM articles should reduce user confusion over article versioning.
Note: You still retain the right to post your author-prepared preprint versions on your home pages and in your institutional repositories with DOI pointers to the definitive version permanently maintained in the ACM Digital Library. But any download of your preprint versions will not be counted in ACM usage statistics. If you use these AUTHOR-IZER links instead, usage by visitors to your page will be recorded in the ACM Digital Library and displayed on your page.
FAQ
- Q. What is ACM Author-Izer?
A. ACM Author-Izer is a unique, link-based, self-archiving service that enables ACM authors to generate and post links on either their home page or institutional repository for visitors to download the definitive version of their articles for free.
- Q. What articles are eligible for ACM Author-Izer?
- A. ACM Author-Izer can be applied to all the articles authors have ever published with ACM. It is also available to authors who will have articles published in ACM publications in the future.
- Q. Are there any restrictions on authors to use this service?
- A. No. An author does not need to subscribe to the ACM Digital Library nor even be a member of ACM.
- Q. What are the requirements to use this service?
- A. To access ACM Author-Izer, authors need to have a free ACM web account, must have an ACM Author Profile page in the Digital Library, and must take ownership of their Author Profile page.
- Q. What is an ACM Author Profile Page?
- A. The Author Profile Page initially collects all the professional information known about authors from the publications record as known by the ACM Digital Library. The Author Profile Page supplies a quick snapshot of an author's contribution to the field and some rudimentary measures of influence upon it. Over time, the contents of the Author Profile page may expand at the direction of the community. Please visit the ACM Author Profile documentation page for more background information on these pages.
- Q. How do I find my Author Profile page and take ownership?
- A. You will need to take the following steps:
- Create a free ACM Web Account
- Sign-In to the ACM Digital Library
- Find your Author Profile Page by searching the ACM Digital Library for your name
- Find the result you authored (where your author name is a clickable link)
- Click on your name to go to the Author Profile Page
- Click the "Add Personal Information" link on the Author Profile Page
- Wait for ACM review and approval; generally less than 24 hours
- Q. Why does my photo not appear?
- A. Make sure that the image you submit is in .jpg or .gif format and that the file name does not contain special characters
- Q. What if I cannot find the Add Personal Information function on my author page?
- A. The ACM account linked to your profile page is different than the one you are logged into. Please logout and login to the account associated with your Author Profile Page.
- Q. What happens if an author changes the location of his bibliography or moves to a new institution?
- A. Should authors change institutions or sites, they can utilize ACM Author-Izer to disable old links and re-authorize new links for free downloads from a new location.
- Q. What happens if an author provides a URL that redirects to the author’s personal bibliography page?
- A. The service will not provide a free download from the ACM Digital Library. Instead the person who uses that link will simply go to the Citation Page for that article in the ACM Digital Library where the article may be accessed under the usual subscription rules.
However, if the author provides the target page URL, any link that redirects to that target page will enable a free download from the Service.
- Q. What happens if the author’s bibliography lives on a page with several aliases?
- A. Only one alias will work, whichever one is registered as the page containing the author’s bibliography. ACM has no technical solution to this problem at this time.
- Q. Why should authors use ACM Author-Izer?
- A. ACM Author-Izer lets visitors to authors’ personal home pages download articles for no charge from the ACM Digital Library. It allows authors to dynamically display real-time download and citation statistics for each “authorized” article on their personal site.
- Q. Does ACM Author-Izer provide benefits for authors?
- A. Downloads of definitive articles via Author-Izer links on the authors’ personal web page are captured in official ACM statistics to more accurately reflect usage and impact measurements.
Authors who do not use ACM Author-Izer links will not have downloads from their local, personal bibliographies counted. They do, however, retain the existing right to post author-prepared preprint versions on their home pages or institutional repositories with DOI pointers to the definitive version permanently maintained in the ACM Digital Library.
- Q. How does ACM Author-Izer benefit the computing community?
- A. ACM Author-Izer expands the visibility and dissemination of the definitive version of ACM articles. It is based on ACM’s strong belief that the computing community should have the widest possible access to the definitive versions of scholarly literature. By linking authors’ personal bibliography with the ACM Digital Library, user confusion over article versioning should be reduced over time.
In making ACM Author-Izer a free service to both authors and visitors to their websites, ACM is emphasizing its continuing commitment to the interests of its authors and to the computing community in ways that are consistent with its existing subscription-based access model.
- Q. Why can’t I find my most recent publication in my ACM Author Profile Page?
- A. There is a time delay between publication and the process which associates that publication with an Author Profile Page. Right now, that process usually takes 4-8 weeks.
- Q. How does ACM Author-Izer expand ACM’s “Green Path” Access Policies?
- A. ACM Author-Izer extends the rights and permissions that authors retain even after copyright transfer to ACM, which has been among the “greenest” publishers. ACM enables its author community to retain a wide range of rights related to copyright and reuse of materials. They include:
- Posting rights that ensure free access to their work outside the ACM Digital Library and print publications
- Rights to reuse any portion of their work in new works that they may create
- Copyright to artistic images in ACM’s graphics-oriented publications that authors may want to exploit in commercial contexts
- All patent rights, which remain with the original owner