Results 11 to 20 of about 31,863 (175)

Lógica de las tautologías

open access: yesIngeniería y Ciencia, 2012
Se presenta como extensión del cálculo proposicional clásico, el sistema deductivo LT: lógica de las tautologías. En el sistema LT, se formalizan las nociones meta-lógicas de tautología, contradicción, satisfacible, refutable y contingencia.
Manuel Sierra A.
doaj   +1 more source

LÓGICA MODAL DO OPERADOR DE CONSEQUÊNCIA: HISTÓRICO, REPRESENTAÇÃO POLINOMIAL E DECIDIBILIDADE

open access: yesKínesis, 2014
Este texto apresenta um breve histórico da lógica TK, originalmente motivada pelo conceito de operador de consequência de Tarski, a sua adequação segundo os Espaços de Tarski e uma caracterização como uma lógica modal não normal.
Hércules de Araújo Feitosa   +1 more
doaj   +1 more source

EL NIHILISMO MODAL FRENTE AL ARGUMENTO DE McFRETIDGE A FAVOR DE LA NECESIDAD DE LA CREENCIA EN LA NECESIDAD

open access: yesTópicos, 2013
In this paper I examine McFetridge’s (1990) argument for the necessity of the belief in necessity. The argument purports to establish a fatal dilemma for the modal “nihilist”, he who does not believe that at least some proposition is necessary.
José Edgar González Varela
doaj   +1 more source

Evaluating Youth Participatory Action Research in the Americas: Comparative Insights on Empowerment, Methodologies, and Social Change

open access: yesJournal of Adolescence, Volume 98, Issue 3, Page 698-723, April 2026.
ABSTRACT Introduction Youth Participatory Action Research (YPAR) positions adolescents as co‐researchers to investigate and address social issues affecting their lives. While YPAR has gained global prominence, comparative research examining how it is conceptualized and practiced across regional contexts remains limited.
John Diaz   +5 more
wiley   +1 more source

Descolonizando Decolonizing Linguistics, or the Perils of Refusing Pero no Mucho

open access: yesJournal of Sociolinguistics, Volume 30, Issue 2, Page 198-206, April 2026.
Kakaretso Tshekatsheko eno e e tseneletseng ya Decolonizing Linguistics e baya kgatiso eno mo gare ga dikganetsano tsa Amerika Borwa ka ga sekolone go botsolotsa melelwane ya dipuisano tsa segompieno tsa go tlosa bokolone mo thutapuong ya Seesemane. Ke ikaegile ka tshekatsheko ya ga Cusicanqui ya mogopolo wa go ganetsa sekolone, le mogopolo wa ga Bispo,
Rodrigo Borba
wiley   +1 more source

TEMPO, MODALIDADE E LÓGICA TRIVALENTE EM PEIRCE E LUKASIEWICZ

open access: yesKínesis, 2018
A descoberta de sistemas formais polivalentes foi acompanhada de diferentes motivações filosóficas para o abandono da semântica bivalente e de teoremas da lógica clássica, como o Princípio do Terceiro Excluído.
José Renato Salatiel
doaj   +1 more source

Operatividad lógica de los sistemas maestros [PDF]

open access: yes, 2017
35 p.En el presente capítulo se plantearán las características de los sistemas jurídicos maestros, su aplicabilidad interna y externa, e inclusive se hará alusión a su operatividad lógica sistémica, pero lo más interesante del mismo es que rescata una de
León-Molina, Jorge Enrique
core  

3D‐Printed Titanium Implants with Bioactive Peptide‐Polysaccharide Scaffolds for Personalized Bone Reconstruction

open access: yesAdvanced Healthcare Materials, Volume 15, Issue 12, 25 March 2026.
Porous 3D‐printed titanium implants are made bioactive by integration with a supramolecular peptide‐hyaluronic acid nanofibrillar scaffold, without the addition of exogenous cells or growth factors. Uniform filling of the implant architecture promotes vascularized, spatially homogeneous bone regeneration, significantly enhancing osteogenesis throughout
Noam Rattner   +8 more
wiley   +1 more source

Willard Van Orman Quine's Philosophical Development in the 1930s and 1940s [PDF]

open access: yes, 2018
As analytic philosophy is becoming increasingly aware of and interested in its own history, the study of that field is broadening to include, not just its earliest beginnings, but also the mid-twentieth century.
Janssen-Lauret, Frederique
core  

Street‐Level Institutional Work: How Social Workers Maintain, Disrupt, and Create the Rules of Social Organizations

open access: yesEuropean Policy Analysis, Volume 12, Issue 2, Spring 2026.
ABSTRACT Research has shown that street‐level workers may shape public policies, yet less is known about the processes through which they attempt to influence institutional arrangements. This gap is particularly evident in corporatist welfare states, where multiple organizations are involved in social policy implementation.
Olivia Mettang
wiley   +1 more source

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