Search results for " Central"
showing 10 items of 560 documents
Auditory brain stem responses in patients with human immunotropic virus infection of different stages.
1992
Thirty patients (26 men, 4 women) with human immunotropic virus infection of different stages were examined. Eleven patients had a history of i.v. drug abuse, nine patients had a history of treated lues infection, and one patient suffered from Kaposi's sarcoma. At the time of the examination, opportunistic infections or acute encephalitis were not apparent in any patient. All patients underwent otoneurological examinations, including pure-tone audiometry, caloric vestibular testing, and recording of the auditory brain stem responses (ABR). Six patients reported onset of hearing impairment during the last 3 yr. Two of them had flat sensorineural hearing loss; in the other cases, pure-tone au…
Silene crassiuscula (Caryophyllaceae), a new species from Sicily
2015
Silene crassiuscula,, a new species of S. sect. Dipterosperma, is described and illustrated from North-Western Sicily. It is an annual halophyte with succulent growing on carbonatic or calcarenitic rocks of coastal stands. From the morphological point of view , S. crassiuscula appears to be similar to the species belonging to the S. colorata group especially to S. nummica, from Sardinia, from which it differs in several features chiefly regarding the habit, leaves, inflorescences, floral pieces and seed micro-morphology. An analytical key of the taxa belonging to this section is also provided.
Alteraciones del sistema nervioso central en la discapacidad intelectual: Síndromes
2010
Se describen las alteraciones en el desarrollo del sistema nervioso central, las partes del encéfalo y sus funciones, el funcionamiento de las neuronas y sinapsis y sus repercusiones en algunos síndromes asociados a la discapacidad intelectual
Differentiating Multiple Sclerosis From AQP4-Neuromyelitis Optica Spectrum Disorder and MOG-Antibody Disease With Imaging.
2023
Background and ObjectivesRelapsing-remitting multiple sclerosis (RRMS), aquaporin-4 antibody–positive neuromyelitis optica spectrum disorder (AQP4-NMOSD), and myelin oligodendrocyte glycoprotein antibody–associated disease (MOGAD) may have overlapping clinical features. There is an unmet need for imaging markers that differentiate between them when serologic testing is unavailable or ambiguous. We assessed whether imaging characteristics typical of MS discriminate RRMS from AQP4-NMOSD and MOGAD, alone and in combination.MethodsAdult, nonacute patients with RRMS, APQ4-NMOSD, and MOGAD and healthy controls were prospectively recruited at the National Hospital for Neurology and Neurosurgery (L…
Le pluralisme politique par la pluralité des modes d'expression : les initiatives populaires comme palliatif des insuffisances de la représentation ?
2007
En France, seul le référendum à l'initiative des gouvernants ou des représentants est institué. La participation directe des citoyens semble effrayer les hommes politiques. Ces réticences françaises montrent bien la spécificité des procédures d'initiative populaire car elles lient les gouvernants et les représentants. Qu'est-ce qui détermine le choix d'adopter une procédure d'initiative populaire ? L'étude des pays de l'Europe centrale et orientale offre un terrain intéressant puisque ce choix s'est opéré lors de l'adoption de leur constitution respective à la suite de leur indépendance. Dans ces sept pays, le choix résulte certes d'un souci de démocratie, mais peut-être aussi d'un manque d…
Nuovi dati biologici e geonemici su Lehmannia melitensis (Lessona & Pollonera, 1882) e Ambigolimax valentianus (A. Férussac, 1823) (Gastropoda: Limac…
2018
Nuovi dati biologici e geonemici sono riportati per Lehmannia melitensis (Lessona & Pollonera, 1882) e Ambigolimax valentianus (A. Férussac, 1823). In particolare, vengono fornite nuove località siciliane di L. melitensis mentre A. valentianus viene segnalato per la prima volta nelle isole italiane di Sardegna, Sicilia e Pantelleria e nell’isola maltese di Gozo. Le due specie, a volte simili nella morfologia esterna, si distinguono con certezza solo attraverso l’esame degli organi genitali. New records from Sicily are provided for Lehmannia melitensis (Lessona & Pollonera, 1882). Ambigolimax valentianus (A. Férussac, 1823) is recorded for the first time from the italian islands of S…
Impact of centrality on cooperative processes
2016
The solution of today's complex problems requires the grouping of task forces whose members are usually connected remotely over long physical distances and different time zones. Hence, understanding the effects of imposed communication patterns (i.e., who can communicate with whom) on group performance is important. Here, we use an agent-based model to explore the influence of the betweenness centrality of the nodes on the time the group requires to find the global maxima of NK-fitness landscapes. The agents cooperate by broadcasting messages, informing on their fitness to their neighbors, and use this information to copy the more successful agents in their neighborhood. We find that for ea…
Correlations among Game of Thieves and other centrality measures in complex networks
2021
Social Network Analysis (SNA) is used to study the exchange of resources among individuals, groups, or organizations. The role of individuals or connections in a network is described by a set of centrality metrics which represent one of the most important results of SNA. Degree, closeness, betweenness and clustering coefficient are the most used centrality measures. Their use is, however, severely hampered by their computation cost. This issue can be overcome by an algorithm called Game of Thieves (GoT). Thanks to this new algorithm, we can compute the importance of all elements in a network (i.e. vertices and edges), compared to the total number of vertices. This calculation is done not in…
Revista española de educación comparada
2016
Monográfico con el título: “La educación en América Latina hoy” Resumen basado en el de la publicación Título, resumen y palabras clave también en inglés Se aborda una comprensión de la infancia centroamericana y su derecho a la educación desde los enfoques de Derechos Humanos y de Capacidades de Sen y Nussbaum. Así, partiendo de las premisas de que niños, niñas y adolescentes son sujetos de derechos; la infancia constituye una etapa con identidad propia, clave en el desarrollo de las personas y la educación es un derecho humano fundamental, se profundiza en el establecimiento y estudio de diversos escenarios educativos en los países centroamericanos y en el impacto de las desigualdades de …
Mbandakamine-Type Naphthylisoquinoline Dimers and Related Alkaloids from the Central African Liana Ancistrocladus ealaensis with Antiparasitic and An…
2018
Four new dimeric naphthylisoquinoline alkaloids, michellamine A5 (2) and mbandakamines C–E (4–6), were isolated from the Congolese plant Ancistrocladus ealaensis, along with the known dimer mbandakamine A (3). They represent constitutionally unsymmetric dimers, each consisting of two 5,8′-coupled naphthylisoquinoline monomers. While the molecular halves of michellamine A5 (2) are linked via C-6′ of both of the naphthalene moieties, i.e., via the least-hindered positions, so that the central biaryl axis is configurationally unstable and not an additional element of chirality, the mbandakamines 3–6 possess three consecutive stereogenic axes. Their monomeric units are linked through an unprece…