Although in Portugal it is not something common,
institutions that have renewable energy sources
can use Blockchain to generate, buy and sell
energy to their neighbors, avoiding the need for
intermediary regulatory entities, thus monetizing
the surplus of energy;
Smart contracts can be used to sign contracts
automatically as soon as certain predefined
conditions are met;
Another indisputable advantage of Blockchain is
the dematerialization of documents, by replacing
physical for digital support. It is also possible to
eliminate the risk of loss and/or falsification of
those documents;
Libraries can also expand their services by
building a metadata file and facilitating more
efficient management of digital rights;
In the publishing sector, this technology has the
capacity to revolutionize multiple areas, from the
management of copyright to piracy. Blockchain-
based platforms offer better conditions that
encourage collaboration between authors, editors,
translators and journalists;
With this technology, it is also possible to
streamline the public social security system by
dividing the aid into separate funds for different
expenditure, allowing for greater transparency and
ensuring that the aid is being used for the intended
purposes, as these would be transferred directly to
a given entity without being passed by the citizen.
For example, a student of higher education who
benefits from a scholarship does not receive the
monthly tuition amount, which is automatically
transferred to the educational institution.
Blockchain can be used for the issuance, monitoring,
validation and sharing of diplomas (Kolvenbach et al.,
2018). Although physical diplomas are easily stored,
they can be presented to anyone for any purpose and
are difficult to falsify if they have built-in security
methods. For a third party, an extra effort is required
to validate the diploma. This verification is obtained
by contacting the entity that issued the said diploma;
that is, they have to maintain a file with all the
diplomas issued in the long term.
It can also serve to create a system of credits and
evaluation as demonstrated in EduCTX (Turkanović
et al., 2018). This platform is based on the European
Credit Transfer and Accumulation System (ECTS)
system. This is a credit system with the aim of
facilitating their transfer between European countries.
Taking into account that it is based on the
competencies developed and the workload of a
curricular unit, a student of higher education can
transfer ECTS credits among Universities in order to
continue her/his studies. EduCTX represents a
credible and decentralized assessment and credit
system that provides a unified view for students and
higher education institutions, as well as for other
potential stakeholders such as companies and
organizations. Based on a distributed global network,
the platform processes, manages and controls tokens
that represent the credits students receive for
completing curricular units, equivalent to ECTS. This
proposal is the first step towards a more transparent
and technologically advanced system applied to
higher education.
Another similar platform, though based on
Ethereum, is used to store student classifications and
provide a cryptocurrency (Rooksby and Dimitrov,
2017). In this platform, the following problems were
identified:
The use of Blockchain in storing and managing
grades is interesting because it supports auditing.
However, the most important thing would be to
make this functionality stand-alone rather than
simply being used as an auditable database;
Grades are not generated by an algorithm. The use
of smart contracts stored in a Blockchain to
calculate grades is problematic since there is no
formal algorithm to calculate them. Some
discretion on the part of the teacher is used in
specific cases, and the limits of the grades are
usually flexible (In the case of a student who
obtains a final grade of 9.4 but who has good
results in another component, the teacher may
have the wisdom to pass the student, thus sparing
a new evaluation phase, if any);
Reputation and trust are linked. Universities use
their status to build trust and a Blockchain can be
counterproductive in the sense that trust is based
on an external audit rather than on the reputation
of the institution;
Ownership and scope would be problematic
considering that it is not known who the
Blockchain system will belong to and whether it
will even be controlled by a University, or by a
group of Universities or even by a public network
just like Ethereum. Where and what limits to set
are quite uncertain.
Thus, in order to solve these problems, the proposed
system would keep all the information regarding the
students' academic progress, their grades and the
equivalent final certification. It would have a specific
cryptocurrency for each University that would be
automatically paid by smart contracts to the best
students of each course, promoting and rewarding the
merit of the school. In this way, the best students from
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