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- ACE '11: Proceedings of the 8th International Conference on Advances in Computer Entertainment Technology (1)
- ARTECH '19: Proceedings of the 9th International Conference on Digital and Interactive Arts (1)
- FTfJP 2023: Proceedings of the 25th ACM International Workshop on Formal Techniques for Java-like Programs (1)
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- research-articleOpen Access
Published By ACM
Published By ACM
From overtourism to REC-OVERtourism. A digital experience for sustainable tourism
Sónia Rafael
Fine-Arts Faculty. ITI/LARSyS, University of Lisbon, Portugal
,Mattia Mertens
School of Design, Politecnico di Milano, Italy
,Pedro Ângelo
Fine-Arts Faculty. ITI/LARSyS, University of Lisbon, Portugal
,Mónica Mendes
Fine-Arts Faculty. ITI/LARSyS, University of Lisbon, Portugal
KUI '23: Proceedings of the 20th International Conference on Culture and Computer Science: Code and Materiality•September 2023, Article No.: 16, pp 1-8• https://doi.org/10.1145/3623462.3623468Access to various locations in recent years has been restricted. Some places have had to close due to overtourism, which was fueled by TV shows, movies, and Instagram posts, as well as unsustainable practices that surpassed the projected tourism ...
- 0Citation
- 572
- Downloads
MetricsTotal Citations0Total Downloads572Last 12 Months505Last 6 weeks61
- research-articleOpen Access
Published By ACM
Published By ACM
Gradual Guarantee for FJ with lambda-Expressions
Pedro Ângelo
University of Porto, Portugal
,Viviana Bono
University of Turin, Italy
,Mariangiola Dezani-Ciancaglini
University of Turin, Italy
,Mário Florido
University of Porto, Portugal
FTfJP 2023: Proceedings of the 25th ACM International Workshop on Formal Techniques for Java-like Programs•July 2023, pp 32-38• https://doi.org/10.1145/3605156.3606453We present FJ&λ⋆, a new core calculus that extends Featherweight Java (FJ) with interfaces, λ-expressions, intersection types and a form of dynamic type. Intersection types can be used anywhere, in particular to specify target types of λ-expressions. ...
- 0Citation
- 117
- Downloads
MetricsTotal Citations0Total Downloads117Last 12 Months68Last 6 weeks11- 1
Supplementary Materialisstaws23ftfjpmain-id2-p-archive.zip
- Article
Type Inference for Rank-2 Intersection Types Using Set Unification
Pedro Ângelo
LIACC, Departamento de Ciência de Computadores, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
,Mário Florido
LIACC, Departamento de Ciência de Computadores, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
Theoretical Aspects of Computing – ICTAC 2022•September 2022, pp 462-480• https://doi.org/10.1007/978-3-031-17715-6_29AbstractSeveral type inference approaches for rank-2 idempotent and commutative intersection types have been presented in the literature. Type inference relies on two stages: type constraint generation and solving. Defining constraint generation rules is ...
- 1Citation
MetricsTotal Citations1
- research-articleOpen Access
Published By ACM
Published By ACM
A Typed Lambda Calculus with Gradual Intersection Types
Pedro Ângelo
Faculdade de Ciências & LIACC, Universidade do Porto, Portugal
,Mário Florido
Faculdade de Ciências & LIACC, Universidade do Porto, Portugal
PPDP '22: Proceedings of the 24th International Symposium on Principles and Practice of Declarative Programming•September 2022, Article No.: 9, pp 1-13• https://doi.org/10.1145/3551357.3551382Intersection types have the power to type expressions which are all of many different types. Gradual types combine type checking at both compile-time and run-time. Here we combine these two approaches in a new typed calculus that harness both of their ...
- 0Citation
- 129
- Downloads
MetricsTotal Citations0Total Downloads129Last 12 Months72Last 6 weeks13
- research-article
Published By ACM
Published By ACM
Expanded Boundaries: Art and Non-human Essence as Playful Inspirations for Children's Prosthetics
Juliana Maria Moreira Soares
Universidade de São Paulo Faculdade de Arquitetura e Urbanismo Brazil and Interactive Technologies Institute - ITI/LARSyS, Portugal
,João Pedro Farinha Nunes da Costa
Universidade de Lisboa Faculdade de Belas-Artes, Portugal
,Pedro Ângelo
Universidade de Lisboa Faculdade de Belas-Artes and Interactive Technologies Institute - ITI/LARSyS, Portugal
,Mónica Mendes
Universidade de Lisboa Faculdade de Belas-Artes and Interactive Technologies Institute - ITI/LARSyS, Portugal
TEI '21: Proceedings of the Fifteenth International Conference on Tangible, Embedded, and Embodied Interaction•February 2021, Article No.: 36, pp 1-8• https://doi.org/10.1145/3430524.3440655There is an important gap in Assistive Technology related to the multiple capabilities of exploratory creativity, as with multi-aesthetic and inter-mediatic surfaces, especially in the design and development of child prosthetics. This in-progress ...
- 1Citation
- 229
- Downloads
MetricsTotal Citations1Total Downloads229Last 12 Months21Last 6 weeks1
- demonstration
Published By ACM
Published By ACM
Data Self-Portrait
Catarina Sampaio
Faculdade de Belas-Artes da Universidade de Lisboa, Lisboa Portugal
,Luísa Ribas
CIEBA/ Faculdade de Belas-Artes da Universidade de Lisboa, Lisboa Portugal
,Pedro Ângelo
CIEBA/ Faculdade de Belas-Artes da Universidade de Lisboa, Lisboa Portugal
ARTECH '19: Proceedings of the 9th International Conference on Digital and Interactive Arts•October 2019, Article No.: 87, pp 1-5• https://doi.org/10.1145/3359852.3359963The Data Self-Portrait project aims to explore the creative possibilities associated with the concept of data portrait as a mechanism of representation and expression of individual identity. The project consists in the conception and implementation of a ...
- 0Citation
- 91
- Downloads
MetricsTotal Citations0Total Downloads91Last 12 Months5
- Article
Type Inference for Rank 2 Gradual Intersection Types
Pedro Ângelo
Faculdade de Ciências & LIACC, Universidade do Porto, Porto, Portugal
,Mário Florido
Faculdade de Ciências & LIACC, Universidade do Porto, Porto, Portugal
AbstractIn this paper, we extend a rank 2 intersection type system with gradual types. We then show that the problem of finding a principal typing for a lambda term, in a rank 2 gradual intersection type system is decidable. We present a type inference ...
- 1Citation
MetricsTotal Citations1
- research-article
Published By ACM
Published By ACM
Hug a tree in Africa
Mónica Mendes
Universidade de Lisboa and M-ITI
,Pedro Ângelo
void.io
,Nuno Correia
Universidade Nova de Lisboa and CITI
,Valentina Nisi
Universidade da Madeira
,Nuno Nunes
Universidade da Madeira
,Donovan Costa
Universidade da Madeira
PDC '14: Proceedings of the 13th Participatory Design Conference: Short Papers, Industry Cases, Workshop Descriptions, Doctoral Consortium papers, and Keynote abstracts - Volume 2•October 2014, pp 161-163• https://doi.org/10.1145/2662155.2662220A healthy and sustainable relationship between humans and the built and surrounding natural environment requires a deep rethinking of concepts and models. In this context the exploration of new forms of expression enabled by emerging technologies plays ...
- 3Citation
- 96
- Downloads
MetricsTotal Citations3Total Downloads96Last 12 Months10Last 6 weeks1
- research-article
Published By ACM
Published By ACM
Digital art, HCI and environmental awareness evaluating play with fire
Mónica Mendes
Universidade de Lisboa, Portugal
,Pedro Ângelo
Universidade do Porto, Portugal
,Valentina Nisi
Madera Interactive Technology, Institute Madeira, Portugal
,Nuno Correia
Universidade Nova de Lisboa, Portugal
NordiCHI '12: Proceedings of the 7th Nordic Conference on Human-Computer Interaction: Making Sense Through Design•October 2012, pp 408-417• https://doi.org/10.1145/2399016.2399079Play with Fire (PWF) is an interactive installation challenging its participants to ignite generative fires over live streaming video of forests. The installation is designed to raise awareness towards sustainability issues such as climate change and ...
- 4Citation
- 422
- Downloads
MetricsTotal Citations4Total Downloads422Last 12 Months37Last 6 weeks2
- research-article
Published By ACM
Published By ACM
Play with fire
Mónica Mendes
University of Lisbon and CIEBA, Lisbon, Portugal
,Pedro Ângelo
Audiência Zero, Porto, Portugal
,Valentina Nisi
University of Madeira, Madeira, Portugal
,Nuno Correia
New University of Lisbon and IMG, Lisbon, Portugal
ACE '11: Proceedings of the 8th International Conference on Advances in Computer Entertainment Technology•November 2011, Article No.: 89, pp 1-2• https://doi.org/10.1145/2071423.2071530Play with Fire is an interactive art installation that proposes participants to ignite generative fires over live streaming video of selected forests. This experience paradoxically encourages playing with fire to stimulate awareness and prevention of ...
- 1Citation
- 165
- Downloads
MetricsTotal Citations1Total Downloads165Last 12 Months10Last 6 weeks1
- abstract
Published By ACM
Published By ACM
Hug@ree: a RTiVISS experience
Mónica Mendes
Universidade de Lisboa, Lisbon, Portugal
,Pedro Ângelo
Laboratório de Criação Digital, Porto, Portugal
,Nuno Correia
Universidade Nova de Lisboa, Lisbon, Portugal
TEI '11: Proceedings of the fifth international conference on Tangible, embedded, and embodied interaction•January 2011, pp 415-416• https://doi.org/10.1145/1935701.1935807Hug@ree is an interactive installation that provides a bond between urban beings and the forest. Participants hug a real tree, triggering their registration in the virtual world for further interaction.
- 2Citation
- 160
- Downloads
MetricsTotal Citations2Total Downloads160Last 12 Months11Last 6 weeks1
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