Search results for "Pf"
showing 10 items of 526 documents
Multiple Zeta Values
2017
We study in some detail the very important class of periods called multiple zeta values (MZV). These are periods of mixed Tate motives, which we discussed in Sect. 6.4. Multiple zeta values are in fact periods of unramified mixed Tate motives, a full subcategory of all mixed Tate motives.
D-TMS IN COCAINE ADDICTION: PRELIMINARY FINDINGS
2013
Drug addiction is a brain disease which leads to profound disturbances in an individual’s behaviour. In spite of the progress made in the understanding of the neurobiological mechanisms underlying addiction, expectations from a therapeutic point of view have not been satisfying. Given the modest efficacy of therapeutic tools available, Transcranial Magnetic Stimulation (TMS) seems to be a promising “non-pharmacologic” aid in various neuropathologies(1) including addiction(2) which is characterized by a decrease of dopaminergic activity (DA)(3-4). Thus, ‘restoring’ pre-pathology DA activity may yield clinical benefits in addicts(5). In particular, it has been reported(6) that TMS reduces the…
Targeted NGS for species level phylogenomics: “made to measure” or “one size fits all”?
2017
Targeted high-throughput sequencing using hybrid-enrichment offers a promising source of data for inferring multiple, meaningfully resolved, independent gene trees suitable to address challenging phylogenetic problems in species complexes and rapid radiations. The targets in question can either be adopted directly from more or less universal tools, or custom made for particular clades at considerably greater effort. We applied custom made scripts to select sets of homologous sequence markers from transcriptome and WGS data for use in the flowering plant genus Erica (Ericaceae). We compared the resulting targets to those that would be selected both using different available tools (Hyb-Seq; M…
Moringa oleifera Leaf Powder as Functional Additive in Cookies to Protect SH-SY5Y Cells
2021
The aim of this work is the evaluation of the addition of Moringa leaf powder (MLP) in cookies in terms of antioxidant properties, dough processability and sensorial properties of the cookies. The total content of biophenols and flavonoids in MLP was detected and the identification of the bioactive molecules was performed by HPLC-ESI-TOF-MS measurements, before and after oven treatment at 180 ◦C for 20 min. After a preliminary evaluation of the MLP water soluble fraction (MLPsf) cytotoxicity, its protective effect against an oxidative injury induced in the SH-SY5Y cells was assessed. Data evidence that the bioactive molecules present in MLPsf are effective in preventing ROS production and i…
Some Afterthoughts on Hopfield Networks
1999
In the present paper we investigate four relatively independent issues, which complete our knowledge regarding the computational aspects of popular Hopfield nets. In Section 2 of the paper, the computational equivalence of convergent asymmetric and Hopfield nets is shown with respect to network size. In Section 3, the convergence time of Hopfield nets is analyzed in terms of bit representations. In Section 4, a polynomial time approximate algorithm for the minimum energy problem is shown. In Section 5, the Turing universality of analog Hopfield nets is studied. peerReviewed
Is rootstock-induced dwarfing in olive an effect of reduced plant hydraulic efficiency?
2006
We investigated the hydraulic architecture of young olive trees either self-rooted or grafted on rootstocks with contrasting size-controlling potential. Clones of Olea europea L. (Olive) cv ''Leccino'' inducing vigorous scion growth (Leccino ''Minerva'', LM) or scion dwarfing (Leccino ''Dwarf'', LD) were studied in different scion/rootstock combinations (LD, LM, LD/LD, LM/LM, LD/LM and LM/LD). Shoots growing on LD root systems developed about 50% less leaf surface area than shoots growing on LM root systems. Root systems accounted for 60-70% of plant hydraulic resistance (R), whereas hydraulic resistance of the graft union was negligible. Hydraulic conductance (K = 1/R) of LD root systems w…
Comparison of MeSH terms and KeyWords Plus terms for more accurate classification in medical research fields. A case study in cannabis research
2021
Abstract KeyWords Plus and Medical Subject Headings (MeSH) are widely used in bibliometric studies for topic mapping. The objective of this study is to compare the two description systems in documents about cannabis research to find the concordance between systems and establish whether there is neutrality in topic mapping. A total of 25,593 articles from 1970 to 2019 were drawn from Web of Science's Core Collection and Medline and analyzed. The tidytext library, Zipf's law, topic modeling tools, the contingency coefficient, Cramer's V, and Cohen's kappa were used. The results included 10,107 MeSH terms and 28,870 KeyWords Plus terms. The Zipf distribution of the terms was different for each…
"Que inventen ellos"
2011
Malgrat la relació existent entre la inversió en ciència i tecnologia i el desenvolupament econòmic d’una societat, per a la Generalitat Valenciana la ciència és un afegit bonic que pot fer somiar però que no porta diners immediats. Per això han deixat amb un pressupost insuficient el Centre d'Investigació Principe Felipe (CIPF), cosa que ha comportat l'acomiadament de 114 investigadors i tècnics reconeguts internacionalment. Although a clear relationship exists between investment in science and technology and economic development of society, for the Generalitat Valenciana (Valencian Government) science is a nice addition that makes dream but can not bring immediate cash. Therefore they hav…
Demanda y escalas de equivalencia: evidencia para España
2004
El objetivo de este trabajo es plantear teoricamente el estudio de los efectos que los hijos imponen sobre las decisiones de demanda del hogar (los costes de los hijos, por ejemplo), tanto desde el punto de vista dinamico como estatico, utilizando el concepto de separabilidad demografica. Ademas, establecer la relacion entre ambos conceptos teoricos nos permitira investigar el grado de imprecision o el sesgo que se produce cuando se utiliza una medida estatica frente a una medida intertemporal. El ejercicio empirico se lleva a cabo utilizando un panel de datos extraido de la Encuesta Continua de Presupuestos Familiares, que cubre el periodo 1985-1995. Se estima un sistema de demanda Marshal…
Dracocephalum ruyschiana L. (Granstkalns pie Ikšķiles)
1901
Nordischer Drachenkopf finen in Livland, Kreis Riga. Grantkalns nordöstlich von Uexüll. /// Ruiša pūķgalve, atradne: Livlande, Rīgas apriņķī Granstkalnā ziemeļaustrumos no Ikšķiles. /// Northern Dragon-head, deposit: Livland, Riga district, Granstkalns, northeast of Ikšķile. [Attēls no LU Muzeja kolekcijas Herbarium Balticum (RIG I); (BOT 2791_1)]