Search results for "block"
showing 10 items of 1177 documents
Optimal Sampling Period and Required Number of Samples for OSTBC-MIMO Rayleigh Fading Channel Capacity Simulators
2014
The purpose of this paper is to contribute to the performance assessment of channel capacity simulators. Here, we consider the instantaneous capacity (also referred to as the mutual information) in orthogonal space-time block code (OSTBC) transceiver systems over multiple-input multiple-output (MIMO) Rayleigh fading channels. To ensure that the level-crossing rate (LCR) of the instantaneous capacity can efficiently and accurately be simulated, we derive closed-form approximate solutions to the optimal sampling period and the required number of samples to be generated. Several numerical examples will be presented to illustrate the usefulness of our procedure. It will also be shown that the d…
Bollettino di Matematica pura e applicata
2020
The paper emphasizes some the advances of knowledge in mathematics problems ad new applications. The Bollettino is open to the contribution of Italian or foreign researchers.
Examples of additive designs
2012
In this paper we present some additive designs.
On the representations in GF(3)^4 of the Hadamard design H_11
2020
In this paper we study the representations of the 2-(11,5,2) Hadamard design H_11 = (P,B) as a set of eleven points in the 4-dimensional vector space GF(3)^4, under the conditions that the five points in each block sum up to zero, and dim ‹P› = 4. We show that, up to linear automorphism, there exist precisely two distinct, linearly nonisomorphic representations, and, in either case, we characterize the family S of all the 5-subsets of P whose elements sum up to zero. In both cases, S properly contains the family of blocks B, thereby showing that a previous result on the representations of H_11 in GF(3)^5 cannot be improved.
Mathematical problem-solving in early school years with Bee-bot
2018
Los entornos relacionados con la robótica y los lenguajes visuales de programación por bloques permiten plantear tareas que pueden ser entendidas como problemas con contenido matemático aptos para edades escolares tempranas. Estos entornos permiten proponer situaciones problemáticas en edades en las que el formalismo o el escaso conocimiento matemático impide a los estudiantes abordar problemas matemáticos más complejos. En este trabajo se da cuenta de cómo el robot programable Bee-bot constituye un dispositivo privilegiado donde poder observar cómo los estudiantes toman decisiones durante el proceso de resolución. The environments related to robotics and the visual block-based programming …
Foster Carbon-Neutrality in the Built Environment: A Blockchain-Based Approach for the Energy Interaction Among Buildings
2022
Decarbonizing urban environments and reducing their energy consumption is one of modern society biggest commitments. In this regard, both the scientific community and international governments have been giving special consideration on improving the energy-environmental performance of mostly single buildings; recently the focus has been shifting towards a broader Positive Energy District (PED)/ Energy Community (EC) vision, from small clustered group of buildings to neighborhoods up until urban settlements. In this respect, integrating the use of renewable energy resources (RES) and actively involving building users can have a significant environmental impact on local areas. Within this fram…
Blockchain e criptovalute: strumento di democratizzazione imprenditoriale o bolla speculativa?
2018
L’obiettivo di questo lavoro (che costituisce il primo step di un più articolato percorso di ricerca) è di fornire un quadro teorico di riferimento utile alla comprensione delle possibili conseguenze che l’avvento della blockchain e delle criptovalute può avere sul contesto imprenditoriale e strategico-competitivo. Nello specifico, si vuole indagare se l’utilizzo della tecnologia blockchain possa rappresentare un effettivo strumento di “democratizzazione imprenditoriale” e di enfatizzazione del personal power dei singoli attori oppure sia il driver di una bolla speculativa basata sulle criptovalute.
Blockchain-Based Decentralized Business Models in the Sharing Economy: A Technology Adoption Perspective
2018
Recently, blockchain technology has increasingly been deemed to enable novel “decentralized” business models for the sharing economy and thereby potentially provide an alternative to extant “centralized” sharing economy business models. Using a technology adoption perspective, our chapter explores under which circumstances such blockchain-based decentralized sharing economy business models may be widely adopted. Building on extant research, we theorize on the factors that are relevant for adoption from the individual users’ perspective. We then derive eight potential adoption scenarios of blockchain-based decentralized sharing economy business models and explore adoption using an agent-base…
“Right to erasure” and private blockchain in the European Union: legal requirements and technical possibilites
2020
Blockchain, serving as one of the most complex networks used within an organization may be regarded as challenging for the applicability and realization of the General Data Protection Regulation Article 17, which gives the data subject right to erasure or a “right to be forgotten” to ones’ personal data. The immutability and decentralized character of the system does not prescribe the erasure of personal data on the chain, as well as poses problems in determining the competent authority responsible for data protection compliance, when the data subject needs to exercise its rights under the GDPR. The thesis examines whether the compliance with the General Data Protection Regulation’s Article…
Blockchain e pubblica amministrazione: stato dell'arte e prospettive
2021
La tecnologia blockchain sta catturando sempre più l’attenzione degli operatori del settore tecnologico e delle istituzioni italiane ed europee. Le molteplici applicazioni di questa tecnologia, in una prima fase accostate esclusivamente al settore finanziario, sembrano oggi avere una portata sterminata: servizi pubblici, tutela della privacy, identità digitale, tracciamento delle filiere produttive sono soltanto alcuni degli ambiti compatibili con quella che sembra poter essere una nuova rivoluzione industriale. Solo di recente, però, esse sono state oggetto di studio nell’ambito del diritto pubblico, aprendo nuovi orizzonti che non possono essere più esclusi dal dibattito della scienza del…