Categorial Status of Yoruba Attributive Modifiers

This paper re-examines claims in the literature that Yoruba attributive words such as dúdú black’, pupa ‘red’, funfun ‘white’, etc., which function as modifiers of N, are adjectives. It provides data and analytic evidence to show that the items have the morphology and syntax of nominals. The fact that the items in question have the syntactic distribution and morphology of nouns; semantically refer to attributive features such as colour, size, quantity, etc. of concrete nouns; and sometimes function as verbs with the same phonetic forms informs the conclusion that they are not canonic adjectives but derived nouns converted to verbs and possibly adjectives, respectively, via a N→V/A conversion process. It equally argues that forms like burúkú ‘bad’ and wé ̣é ̣ré ̣‘small (-bits)’are morpho-syntactically fused compounds consisting of verb + degree adverb

Prepositions in Igálà

Previous studies on Igala grammar are unanimous on the claim that the language employs body parts, place nouns, and certain verbs as prepositions. This study questions the claim from both syntactic and semantic points of view and argues to the contrary that the items analysed as body parts and/or place prepositions are N1 spatial nouns in an [N1 N2] genitive phrase complement of preposition in a structural context where the preposition head is phonetically spelt-out null in the syntax. Given its exclusive locative-goal denotation, the paper argues that tú in contexts like tú unyí un ‘to his/her house’ is a lexicalization of preposition in Igálà

Magneto-Rotational Augmentation of Bioconvective Transport in Plasma-Nanofluid Flowing through a Penetrable Spinning Disc

The phenomenon of bioconvective transport through the manipulation of motile microorganisms is considered a promising process control technique in several biological processes and microdevices. Inducing convective transport in self-propelling microbes could be tailored to improve mixing, reaction propensity, and concentration transport within the media. This paper examined the combined effect of magnetic and rotational fields on the argumentation of bioconvective transport in the nanofluid-mediated plasma flow. A detailed analysis of the transport and dynamics of reactive forces during bioconvection in a rotary disclike microchannel is presented. The physics of the problem was described by coupled nonlinear ordinary differential equations, which were numerically computed using the spectral relaxation scheme of the spectral homotopy analysis method. It was observed that the imposition of a magnetic field constituted viscous drag in the plasma-nanofluid media, which consequently increases the thermophoretic parameter in the bioconvective flow. It was ascertained that coupled magnetic and rotational effects significantly augmented the motility of microorganisms and translated to growth in momentum and concentration fields which is noticeable in the generation of stretching effect on the bacterium-containing plasma-nanofluid flow. The findings of this study could provide an essential basis for the design of bioreactors, centrifugal microfluidics technologies, and microdevices for use in a broad spectrum of biotechnology

Preliminaries and Content

Preliminaries and Conten

Negation in Igálà Negation in Igálà

Unlike other Yoruboid languages, Igálà uses a double negation syntax which combines two independent but mutually obligatory elements to generate a single semantic unit of negation. Apart from providing a description of Igálà negatio nsystem, this paper, relying on instruments of minimalist grammar as propounded in Chomsky (1995, 1998, 2002), argues for a negative clause projection in which there are two separate but interdependent Neg projections – NegP1 and NegP2 - such that Negº2 takes NegP1 as complement to project NegP2. Spell-out constituent ordering derives from Negº2 <strong>ń/nóò</strong> attracting NegP1 to Spec-NegP2 resulting in the word order where Negº2 obligatorily ends negative clause expressions in Igálà. This grammar structurally predicts that nothing follows Negº2 <strong>ń/nóò</strong> in the linear orderof words in Igálà negative clause constructions.Diferentemente de outras línguas Yoruboid, Igalá usa uma sintaxe da dupla negação que combina dois elementos independentes, mas mutuamenteo brigatórios para gerar uma única unidade semântica de negação. Além de prover uma descrição do sistema de negação do Igalá, esse artigo, apoiado em instrumentos da gramática minimalista, como proposta por Chomsky (1995, 1998, 2002), defende uma projeção da oração negativa em que há duas projeções Neg separadas, mas interdependentes - NegP1 e NegP2 - de tal modo que Negº2 toma NegP1 como complemento para projetar NegP2. A ordenação do constituinte explícito deriva de a Negº2 <strong>ń/nóò</strong> atrair NegP1 para SpecNegP2, resultando numa ordem de palavras em que Negº2 obrigatoriamente fica no final de orações negativas em Igalá. Esta gramática prevê estruturalmente que nada segue Negº2 <strong>ń/nóò</strong> na ordem linear de palavras em construções oracionais negativas em Igalá