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Final dissertation for MSc in Artificial Intelligence at @unibo

gmurro/master-thesis

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🎓 final thesis for msc in artificial intelligence 📄.

This repository contains a final thesis realized for the Master's degree in Artificial Intelligence , University of Bologna.

With the advent of high-performance computing devices, deep neural networks have gained a lot of popularity in solving many Natural Language Processing tasks. However, they are also vulnerable to adversarial attacks, which are able to modify the input text in order to mislead the target model. Adversarial attacks are a serious threat to the security of deep neural networks, and they can be used to craft adversarial examples that steer the model towards a wrong decision. In this dissertation, we propose SynBA, a novel contextualized synonym-based adversarial attack for text classification. SynBA is based on the idea of replacing words in the input text with their synonyms, which are selected according to the context of the sentence. We show that SynBA successfully generates adversarial examples that are able to fool the target model with a high success rate. We demonstrate three advantages of this proposed approach: (1) effective - it outperforms state-of-the-art attacks by semantic similarity and perturbation rate, (2) utility-preserving - it preserves semantic content, grammaticality, and correct types classified by humans, and (3) efficient - it performs attacks faster than other methods.

Citing SynBA

If you use SynBA for your research, please cite as follows:

The full text of the thesis is available at this link for online dissemination and communication through AMSLaurea, the institutional archive of the University of Bologna. Otherwise it is also accessible at this path .

Slides presented during the thesis discussion held on campus on 6th December 2022 can be retrieved from this directory .

LaTeX compilation

If you want to re-compile the LaTeX code or use it as template for your own thesis, you need to have a LaTeX distribution installed on your machine. I recommend TeX Live . Follow this tutorial to configure LaTeX with VSCode.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

• Python 80.3%
• Jupyter Notebook 5.5%

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Dissertation

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Information on the final exam

All PhD students enrolled in the last year of the course must apply for admission to the final exam and submit their thesis within the deadlines established for each PhD cycle.

Each thesis is subject to the judgment of at least two evaluators, chosen by the Teaching Commission from persons external to the institutions that compete for the award of the degree and not part of the jury. The evaluators express a written opinion on the thesis and propose its admission to public discussion or postponement.

The PhD students admitted to the public discussion in the first instance following the favourable judgment by the evaluators will take the final exam in the presence of the jury on a date established by the Academic Board of the PhD Course. The students for whom the evaluators have foreseen the postponement of the public discussion will take the final exam in the presence of the judging commission at a later date, again established by the Teaching Commission of the PhD Course.

We request the publication in indexed international journals of at least five original works per year, the active participation with the presentation of abstracts at least two congresses per year or the publication of a book chapter or a monograph. At the end of the three years, it is also necessary to publish at least 3 articles reviewed on PUBMED with impact factor.

Already enrolled PhD students who have to apply for the final exam and thesis can find information on administrative deadlines in the link listed in the right sidebar.Already enrolled PhD students who have to apply for the final exam and thesis can find information on administrative deadlines in the link listed in the right sidebar.

• Final exam and PhD thesis
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Information on writing a dissertation

Choosing the subject and the rules on preparing the dissertation for the final examination.

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The final examination (in your study plan the Final Examination is worth 15 credits) consists of the defense of a thesis/dissertation in front a Committee (composed by 3 professors of the School of Economics and management). The dissertation should be prepared under the guidance of a supervisor (relatore).

The dissertation should be prepared under the guidance of a supervisor (relatore) and could be based on a project/ work/internship experience. The purpose of a thesis is to enable the student to develop deeper knowledge, understanding, capabilities and attitudes in the context of the programme of study. The thesis should be written at the end of the programme and offers the opportunity to delve more deeply into and synthesize knowledge acquired in previous studies.

Choosing the supervisor  

The supervisor: only full, associate and assistant professors and adjunct lecturers holding a teaching activity within the School of Economics, Management ans Statistics can act as supervisors. Visiting teachers and seminar speakers  cannot  be supervisors (unless provided by a specific agreement). However, they can act as " controrelatore ".

The " controrelatore " is optional and must be suggested by the supervisor according to the relevance of the thesis, in order to get the 2 extra-points. The supervisor should submit the request of the  controrelatore  to the Vice-Presidency offices within a reasonable time, at least one month before the graduation, to allow the Director of the program to confirm or change the  controrelatore  and to allow the student to provide him/her with a copy of the thesis at least 15 days before the graduation. The  controrelatore  may take part in the graduation session, if he/she is available. In case of absence he/she has to send the assessment of the thesis through a letter or email to the President of the Graduation Commission.

The title of the thesis has to be agreed with the supervisor and should be submitted with the application for graduation within the specified deadlines (see below).

Proposing the subject

The graduating student may choose to major in a  teaching activity of the study plan , both from the first or second year, even if the student attended part of the second year abroad (Erasmus or Overseas). The student has to prove to be able to put together and summarize a bibliography on the subject and re-elaborate it based on the required editorial rules.

Students are suggested to ask the availability of the prospective  supervisor  as soon as possible (since he/she might not be available), and according to the internship experience and/or to the topic chosen for the dissertation 

Editorial rules

Basic editorial rules to write a dissertation:

• Length: between 50-100 pages including notes, tables and attachments.
• §  pages with 32-35 text lines, each containing 65-70 characters;
• Line space: 1 or 1,5;
• font: Times New Roman or Arial;font size: 12 or 13 (10 for footnotes);
• Margins: 2-2-2-2;
• The use of the  Unibo  logo is strictly forbidden in the title page. The Unibo will proceed legally against violators for counterfeiting the seal. (R.D. 21/6/1942, as amended by Legislative Decree No. 480 of 1992 issued in implementation of the EU Directive No. 10 of 1989 and further amended by Legislative Decree No. 198 of 1996).

Accurate referencing and bibliography is an important element of the thesis. Students should adopt a standard quotation system and bibliography format. Please note that besides these general  guidelines , students will refer to each supervisor in order to use the appropriate referencing style.

However, the quality of the thesis depends on its content, not on its length. Graduating students are expected to know the literature sorrounding the topic under investigation, to master the methodology, and to advance the state of the art by submitting a piece of original research. The novelty can be in the theoretical / empirical approach, in the data used or collected, in the case-study analysed, or in the critical approach taken. Remember to precisely quote all the reference material that has been consulted and used and that plagiarism is strictly forbidden and is considered a serious offence.

The university takes  plagiarism  very seriously and  has legal implications : concepts and statements taken from the literature should be appropriately reworded and referenced.

Final grade

The Board expresses its assessment with a grade out of one hundred and ten. The exam is deemed to be passed with a minimum grade of 66/110 and a maximum grade of 110/110. In the case of granting a maximum grade, the Board may also grant honours (lode) by unanimous decision.

The criteria to assess dissertations are:

• originality of the subject,
• correct methodology,
• level of in-depth analysis,
• adequate writing and editing,
• ability to express and present the dissertation.

Students can calculate the weighted average score of their marks with respect to the credits of the exams.

Additional points 

Rounding: The value resulting from previous calculations is rounded up to the nearest value.

IMPORTANT: The courses and activities that provide an assessment passed/failed ( idoneità ) such as laboratories, seminars or internships are not counted in the weighted average.  The averages will be published online a few days before the graduation. You can contact the Students Administrative Office (Segreteria studenti) to check it before your discussion.

For further information on the matriculation of the previous years, see the  website page .

The Final Examination Board, having taken into consideration the dissertation discussion and your curriculum, will decide the final grade, which will be proclaimed after the discussion (or published on the last day of the Graduation Session on  Studenti Online ).

Graduation ceremony 

At the end of the discussion the Committee President will pronounce the student Dottore Magistrale "Master". Graduation certificate is available online under “ autocertificazioni online ” a few days after the declaration, while the parchment ( pergamena  - the original handwritten diploma) will be sent to the correspondence address (domicile or residence) registered on Studenti Online. All students are invited to carefully check the address used in the graduation application and, if necessary, amend it. Any errors could cause serious delays in delivery.

The certificates will be sent at the expense of the University, following notice to your university e-mail address, within four months from the final date of the graduation session in which the degree was obtained. In any case, it is possible to obtain a degree certificate even a few days after the final examination. 

Degree Certificate

Certificates of graduation may be requested to the Registrar office or downloaded by “autocertificazioni online” a few days after the proclamationThe University now sends degree certificates to your home address.  Graduates will receive their certificate (pergamena) directly at the address (domicile or residence) registered in Studenti online for correspondence. All students are invited to carefully check the address used in the graduation application and modify it if necessary. Any errors could cause serious delays in delivery. The certificates will be sent at the expense of the University, following notice to your university e-mail address, within four months from the final date of the graduation session. It is possible to obtain a degree certificate even a few days after the final examination.

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Depositing a dissertation/final paper in the library

Instructions for depositing a hard copy of a dissertation/final paper in the Aquaculture Section of the Cesena Campus Library

Each graduating student is invited to deposit a hard copy of their dissertation/final paper in the Aquaculture Section of the Cesena Campus Library; doing so is optional . The candidate must fill in a disclaimer in which he/she authorises others to consult his/her dissertation/final paper. The work must be personally delivered by the candidate; otherwise the person who delivers the work must bring along: a mandate, indicating the general details of the delegating and delegated parties; his/her valid proof of identity; (copy of) valid proof of identity of the delegating party; a disclaimer authorising the consultation of the work, already filled in and signed (please see in the Attachments).

Attachments

Disclaimer authorising the consultation of the thesis / final paper - Aquaculture Library (in Italian) [.pdf 124 KB]

Cesena Campus Library - Aquaculture and Fish Production Hygiene Section

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