Coupling of quantum angular momenta: an insight into analogic/discrete and local/global models of computation

In the past few years there has been a tumultuous activity aimed at introducing novel conceptual schemes for quantum computing. The approach proposed in (Marzuoli A and Rasetti M 2002, 2005a) relies on the (re)coupling theory of SU(2) angular momenta and can be viewed as a generalization to arbitrary values of the spin variables of the usual quantum-circuit model based on `qubits' and Boolean gates. Computational states belong to finite-dimensional Hilbert spaces labelled by both discrete and continuous parameters, and unitary gates may depend on quantum numbers ranging over finite sets of values as well as continuous (angular) variables. Such a framework is an ideal playground to discuss discrete (digital) and analogic computational processes, together with their relationships occuring when a consistent semiclassical limit takes place on discrete quantum gates. When working with purely discrete unitary gates, the simulator is naturally modelled as families of quantum finite states--machines which in turn represent discrete versions of topological quantum computation models. We argue that our model embodies a sort of unifying paradigm for computing inspired by Nature and, even more ambitiously, a universal setting in which suitably encoded quantum symbolic manipulations of combinatorial, topological and algebraic problems might find their `natural' computational reference model.Comment: 17 pages, 1 figure; Workshop `Natural processes and models of computation' Bologna (Italy) June 16-18 2005; to appear in Natural Computin

Teacher training: a model for introducing innovative digital Methodologies for learning Mathematics.

[EN] This paper shows a model of teacher training developed by the XXX of the ZZZ, aimed at introducing teachers to the use of innovative methodologies for learning Mathematics and for developing disciplinary and cross-cutting competences. The learning methodologies proposed are mainly based on Problem Posing and Problem Solving, the use of an Advanced Computing Environment, of a Virtual Learning Environment and of an Automated Assessment System. The training model, designed in blended modality, mainly relies on the creation of an online community of practice, where teachers, supported by tutors, collaborate in the creation of interactive learning materials for their classes. They acquire competences not only in the use of learning technologies, but also on sharing and collaborating in virtual environments; they learn how to develop self-tailored didactic methodologies. The key strengths of this model are highlighted and the results, achieved after the experimentation in several projects, are discussed, showing the effectiveness of the modelBarana, A.; Fioravera, M.; Marchisio, M. (2017). Teacher training: a model for introducing innovative digital methodologies for learning Mathematics. En Proceedings of the 3rd International Conference on Higher Education Advances. Editorial Universitat Politècnica de València. 608-616. https://doi.org/10.4995/HEAD17.2017.530360861

What do people want from their lifelogs?

The practice of lifelogging potentially consists of automatically capturing and storing a digital record of every piece of information that a person (lifelogger) encounters in their daily experiences. Lifelogging has become an increasingly popular area of research in recent years. Most current lifeloggiing research focuses on techniques for data capture or processing. Current applications of lifelogging technology are usually driven by new technology inventions, creative ideas of researchers, or the special needs of a particular user group, e.g. individuals with memory impairment. To the best of our knowledge, little work has explored potential lifelogs applications from the perspective of the desires of the general public. One of the difficulties of carrying out such a study is the balancing of the information given to the subject regarding lifelog technology to enable them to generate realistic ideas without limiting or directing their imaginations by providing too much specific information. We report a study in which we take a progressive approach where we introduce lifelogging in three stages, and collect the ideas and opinions of a volunteer group of general public participants on techniques for lifelog capture, and applications and functionality

International norms in regulating e-commerce: the electronic commerce chapter of the comprehensive Trans-pacific Partnership Agreement

The Malaysian government has introduced a number of flagship initiatives to leverage on digital economy and tap the economic trade benefits it promises to the country. For digital economy to grow to its utmost potentials, a supportive eco-legal system is warranted, both at domestic level and international level. As at the heart of digital economy is speedy access to Internet as well as latest gadgets, applications and data analytics, facilitating transfer of data from one country to another should be a matter of first priority. Whilst government seeks to achieve that domestically by introducing relevant laws and regulations, it is no surprise that international norms on data transfer is equally imperative. Using doctrinal analysis, this article explores the provisions of the E-Commerce Chapter of the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) and compares them with existing domestic legal obligations. The E-Commerce chapter that contains provisions on spam, online personal data, location of computing facilities, among others, are in some ways requiring enhancement of existing legal obligation. The paper concludes that implementing CPTPP would not require much structural changes to the existing suite of e-commerce related legislation in Malaysia

Fast Exact NPN Classification with Influence-aided Canonical Form

NPN classification has many applications in the synthesis and verification of digital circuits. The canonical-form-based method is the most common approach, designing a canonical form as representative for the NPN equivalence class first and then computing the transformation function according to the canonical form. Most works use variable symmetries and several signatures, mainly based on the cofactor, to simplify the canonical form construction and computation. This paper describes a novel canonical form and its computation algorithm by introducing Boolean influence to NPN classification, which is a basic concept in analysis of Boolean functions. We show that influence is input-negation-independent, input-permutation-dependent, and has other structural information than previous signatures for NPN classification. Therefore, it is a significant ingredient in speeding up NPN classification. Experimental results prove that influence plays an important role in reducing the transformation enumeration in computing the canonical form. Compared with the state-of-the-art algorithm implemented in ABC, our influence-aided canonical form for exact NPN classification gains up to 5.5x speedup.Comment: To be appeared in ICCAD'2

The urban screen as a socialising platform: exploring the role of place within the urban space

In this paper we explore shared encounters mediated by technologies in the urban space. We investigate aspects that influence the interactions between people and people and people and their surroundings when technology is introduced in the urban space. We highlight the importance of space and the role of place in providing temporal and spatial mechanisms facilitating different types of social interactions and shared encounters. An emperical experiment was condeucted with a prototype that was implemented in the form of a digital screen, embeded in the physical surrounding in selected locations with low, medium and high pedestrian flows in the heritage City of Bath, UK. The aim is to create a novel urban experience that triggers shared encounters among friends, observers or strangers. Using the body as an interaface, the screen acted as a non-traditional interface and a facilitator between people and people and people and their surrounding environment. Here we outline early findings from deploying the digital screen as a socialiasing platform in a city context. We describe the user experience and demonstrate how people move, congregate and socialize around the digital surface. We illustrate the impact of the spatial and syntactical properties on the type of shared interactions in and highlight related issues. The initial findings indicated that introducing a digital platform as a public interactive installation in the urban space may provide a stage for emergent social interactions among various people and motivate users to actively and collaboratively play with the media. However, situating the digital platform in various locations, and depending on the context, might generate diverse and unpredicted social behaviours designers might be unaware of. In this respect we believe that the final experience is shaped by interconnection of structural, social, cultural, temporal and perhaps personal elements. We conclude by mentioning briefly our on going work

Bridging global divides with tracking and tracing technology

Product-tracking technology is increasingly available to big players in the value chain connecting producers to consumers, giving them new competitive advantages. Such shifts in technology don't benefit small producers, especially those in developing regions, to the same degree. This article examines the practicalities of leveling the playing field by creating a generic form of tracing technology that any producer, large or small, can use. It goes beyond considering engineering solutions to look at what happens in the context of use, reporting on work with partners in Chile and India and reflecting on the potential for impact on business and community well-being

Introducing Preservice STEM Teachers to Computer Science: A Narrative of Theoretically Oriented Design

This paper narrates the process of designing a curricular unit that serves to introduce preservice science, technology, engineering, and mathematics (STEM) teachers to computer science (CS) education. Unlike most literature that focuses on results and findings, this paper explains how a justice-centered approach to CS education informed decisions about the theoretical underpinnings of curricular design choices. Situated in issues related to the gentrification of Austin, Texas, the described curricular unit explores how the increased use of CS and growth of the technology sector are having a direct impact on the historically marginalized residents of East Austin. Connected by a theme that maps are both a form of data visualization and political artifact, the described curricular unit uses CS as a tool to: critique the macro-ethics of politics and society; provide a CS learning environment that can be responsive to the multiple social identities of students; and connect CS to larger struggles for justice and liberation.Educatio