Search results for " assignment"

Clerodane diterpenoids from Salvia splendens.

2006

Four new clerodane diterpenoids, salvisplendins A-D (1-4), have been isolated from an acetone extract of the flowers of SalVia splendens, together with an artifact (5), arising from salvisplendin D (4) by addition of diazomethane, and the already known clerodane olearin (6). The structures of the new compounds (1-5) were established mainly by 1D and 2D NMR spectroscopic studies and, in the case of salvisplendin A (1), by chemical correlation with splenolide B (7). Complete 1H and 13C NMR assignments for olearin (6), not published hitherto, are also reported.

Solving Graph Coloring Problems Using Learning Automata

2008

The graph coloring problem (GCP) is a widely studied combinatorial optimization problem with numerous applications, including time tabling, frequency assignment, and register allocation. The growing need for more efficient algorithms has led to the development of several GCP solvers. In this paper, we introduce the first GCP solver that is based on Learning Automata (LA). We enhance traditional Random Walk with LA-based learning capability, encoding the GCP as a Boolean satisfiability problem (SAT). Extensive experiments demonstrate that the LA significantly improve the performance of RW, thus laying the foundation for novel LA-based solutions to the GCP.

Syllabic composition and use frequency: how do they affect stress assignment? A comparison between slow readers and fluent readers

2013

Italian words can be stressed either on penultimate or antepenultimate syllables. In both cases, stress assignment is not predictable by rules, but requires a lexical check. Italian words with stress on the penultimate syllable are defined as regular because the proportion of these words is much larger than words with stress on the antepenultimate syllable, defined as irregular. We propose to investigate the influence (in terms of correct stress positioning) of different syllabic and stress structures during "decoding” by both slow readers and fluent readers. Forty-eight children, twenty-four slow and twenty-four fluent readers, decoded “target words” selected on the basis of frequency (hig…

A graph colouring model for assigning a heterogeneous workforce to a given schedule

1996

Abstract We analyze a heterogeneous workforce assignment problem in which the minimum number of workers required to carry out a machine load plan is calculated. The problem is formulated as a restricted vertex colouring problem and a branch and bound algorithm is presented. The special characteristics of the graph to be coloured allow an efficient implementation of the branch and bound. Computational results show that the algorithm can solve problems of 50 activities, 5, 10 and 15 machines and between 2 to 15 different types of workers in just a few seconds.

HACANCOi : a new Hα-detected experiment for backbone resonance assignment of intrinsically disordered proteins

2020

AbstractUnidirectional coherence transfer is highly efficient in intrinsically disordered proteins (IDPs). Their elevated ps-ns timescale dynamics ensures long transverse (T2) relaxation times allowing sophisticated coherence transfer pathway selection in comparison to folded proteins. 1Hα-detection ensures non-susceptibility to chemical exchange with the solvent and enables chemical shift assignment of consecutive proline residues, typically abundant in IDPs. However, many IDPs undergo a disorder-to-order transition upon interaction with their target protein, which leads to the loss of the favorable relaxation properties. Long coherence transfer routes now result in prohibitively large dec…

Innovació en la manera d'avaluar de treballs en grup per motivar l'atenció dels alumnes

2014

En el nou escenari educatiu de l'Espai Europeu d'Educació Superior (EEES) cobra gran rellevància l'aprenentatge dels alumnes alhora que desenvolupen competències que els ajudin en el seu futur exercici professional. Entre aquestes habilitats es troben la capacitat de treball en equip i la capacitat d'exposar els resultats d'aquest treball d'una manera clara, concisa i rigorós. Per això el professor ha d'incentivar als alumnes a que es prenguin aquesta activitat amb la suficient motivació i fomentant la dedicació de la mateixa. Tradicionalment, l'exposició d'aquests treballs només interessava als propis membres del grup mentre que els seus companys veien aquesta activitat de forma passiva qu…

Kieli kasvattajana äidinkielen opetuksessa Venäjällä

2013

Iz opyta raboty nad učebnym kompleksom "Vsë prosto!"

2016

The article presents the comments of the authors of the textbook series "Vsye Prosto!" ("Everything Is Easy!") on ways of meeting the challenges related to teaching the Russian language at the initial stage. In particular, it involves the introduction of the Russian alphabet, ways of explaining assignments, monitoring achievements and evaluation, as well as the presentation of cross-cultural materials.

The King’s Lace Bug Recaredus rex Distant, 1909 (Hemiptera: Heteroptera: Tingidae): Systematic Position, First Palaearctic and Afrotropical Rec…

2022

The systematic position and actual distribution of Recaredus rex, for a long time one of the most enigmatic lace bug genus and species, is very obscure because only the type specimen and three other individuals from India are known to date. In the present paper, we report the first records of R. rex from the Palaearctic region (Iran) and tropical Africa (Ghana). Based on the occurrence localities and climatic variables, we predict potentially useful ecological niches for this species using Maxent software. The areas with the best environmental conditions for R. rex indicated in our studies suggest its possible Palaeotropical distribution. Moreover, we regard these results as a good starting…

Data from: Can we rely on selected genetic markers for population identification? evidence from coastal Atlantic cod

2019

The use of genetic markers under putative selection in population studies carries the potential for erroneous identification of populations and misassignment of individuals to population of origin. Selected markers are nevertheless attractive, especially in marine organisms that are characterized by weak population structure at neutral loci. Highly fecund species may tolerate the cost of strong selective mortality during early life stages, potentially leading to a shift in offspring genotypes away from the parental proportions. In Atlantic cod, recent genetic studies have uncovered different genotype clusters apparently representing phenotypically cryptic populations that coexist in coastal…