Four studies investigated whether people feel inhibited from engaging in social action incongruent with their apparent self-interest. Participants in Study 1 predicted that they would be evaluated negatively were they to take action on behalf of a cause in which they had no stake or in which they had a stake but held stake-incongruent attitudes. Participants in Study 2 reported both surprise an...

We introduce Casper, a proof of stake-based finality system which overlays an existing proof of work blockchain. Casper is a partial consensus mechanism combining proof of stake algorithm research and Byzantine fault tolerant consensus theory. We introduce our system, prove some desirable features, and show defenses against long range revisions and catastrophic crashes. The Casper overlay provi...

Bitcoin and its underlying blockchain mechanism have been attracting much attention. One of their core innovations, Proof-of-Work (PoW), is notoriously inefficient which potentially motivates a centralization of computing power, defeating the original goal of decentralization. Proof-of-Stake (PoS) is later proposed to replace PoW. However, both PoW and PoS have different inherent advantages and...

Publicado no ano de 2011, contendo 263 páginas, o livro Pesquisa Qualitativa: estudando como as coisas funcionam, Robert Edward Stake apresenta em uma descrição dialógica partes constituintes um projeto pesquisa, caracterizando os elementos desde planejamento à execução da pesquisa qualitativa. O processo elaboração bem cada etapa desenvolvimento mesma requer alguns cuidados fundamentais quais ...