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The Intel 80286 (also marketed as the iAPX 286 and often called Intel 286) is a 16-bit microprocessor that was introduced on February 1, 1982. It was the first 8086-based CPU with separate, non-multiplexed address and data buses and also the first with memory management and wide protection abilities. The 80286 used approximately 134,000 transistors in its original nMOS (HMOS) incarnation and, just like the contemporary 80186, it can correctly execute most software written for the earlier Intel 8086 and 8088 processors. Source: https://en.wikipedia.org/wiki/Intel_80286
Why in general relativity the vacuum is redundant
Stefan Bernhard Rüster
Parana J. Sci. Educ., v.11, n.1, (1-3), February 1, 2025.
DOI: tiny.cc/PJSE24476153v11i1p001-003
Abstract
In this article it is shown that the vacuum in general relativity is redundant, since the terms with the contribution of the vacuum cancel each other out. Because of this, general relativity is a classical and no quantum theory, in which the cosmological constant Λ in no way represents the energy density of the vacuum, but a scalar curvature of space-time, Λ=R/4, when considering matter-free space-time.
Download: Article (in English)
Estudo exploratório de crianças de 11 anos da Escola Rural Municipal Capoeira dos Dinos, Piraquara, Paraná, e suas percepções as inter-relações da fauna e flora, aos Mananciais da Serra em Piraquara, sul do Brasil. (Estudo de caso)
Amauri Betini Bartoszeck
Parana J. Sci. Educ., v.11, n.1, (4-9), February 1, 2025.
Abstract
Esse artigo visa encorajar a gradual introdução de observações de objetos naturais em determinado habitat pelos alunos de uma escola no sul do Brasil antes e depois de lago coletor de águas (manancial) e anotar a presença de vertebrados e invertebrados no local. Os alunos desenharam o que viram na segunda visita ao local por meio de desenhos.
Download: Article (in Portuguese)
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