PDF superior Behaviour of fixed and critical points of the (α, c) −family of iterative methods

Behaviour of fixed and critical points of the  (α, c) −family of iterative methods

Behaviour of fixed and critical points of the (α, c) −family of iterative methods

methods can be applied in the reaction-diffusion equations that arise in auto- catalytic chemical reactions (see [10]) or in the analysis of electronic structure of the hydrogen atom in strong magnetic fields (see [9]). Moreover, numerical treatments of some chemical problems allow to check the models of observable phenomena [8]. Even more, many problems from Chemistry consist in finding chemical potentials that are basic for studying other thermodynamic proper- ties; the modeling of such potentials leads to nonlinear integral equations that can be reduced to a set of nonlinear algebraic equations (see [11] for exam- ple). This encourages the mathematicians to study and improve the numerical methods implied.
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Dynamics of the family of c iterative methods

Dynamics of the family of c iterative methods

In this section we study the dynamical planes corresponding to values of c inside different connected components in the parameter space. These dynamical planes have been obtained by using the software included in [7], implemented in Matlab. The colors used also give us important information: orange regions are the basins of attraction of the fixed point 0; blue regions correspond to the basin of the infinity and the area of convergence of other strange fixed points are shown in other colors. Moreover, black regions are associated to attractive periodical orbits.
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Dynamical Analysis to Explain the NumericalAnomalies in the Family of Ermakov KalitkinType Methods

Dynamical Analysis to Explain the NumericalAnomalies in the Family of Ermakov KalitkinType Methods

such that R 0 (z) = 0 (see [3], for example). Those critical points that do not correspond with any root of polynomial f are called free critical points. All periodic Fatou components are related to critical points being that the basins of attraction of attracting and rationally indifferent points contain, at least, a critical point (see, for example, [15]). Moreover, when R is obtained from a family of iterative methods depending on a parameter α, a free critical point depending on α can be used as an initial estimation of R. Each value of α is related with a member of the class of iterative methods. In this case, a parameter plane is obtained by iterating a free critical point on R. In this parameter plane, we use different colors depending if the orbit of this critical point converges to the roots or not. So, when the orbit does not converge to the root, it means that there are some values of the parameter for which the corresponding numerical methods have pathological behavior.
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Bulbs of Period Two in the Family of Chebyshev Halley Iterative Methods on Quadratic Polynomials

Bulbs of Period Two in the Family of Chebyshev Halley Iterative Methods on Quadratic Polynomials

The set of points 𝑧 ∈ ̂ C such that their families {𝑅 𝑛 (𝑧)} 𝑛∈𝑁 are normal in some neighborhood 𝑈(𝑧) is the Fatou set, F(𝑅), that is, the Fatou set is composed by the set of points whose orbits tend to an attractor (fixed point, periodic orbit, or infinity). Its complement in C ̂ is the Julia set, J(𝑅); therefore, the Julia set includes all repelling fixed points, periodic orbits, and their pre images. That means that the basin of attraction of any fixed point belongs to the Fatou set. On the contrary, the boundaries of the basins of attraction belong to the Julia set.
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Dynamics of a multipoint variant of Chebyshev–Halley’s family

Dynamics of a multipoint variant of Chebyshev–Halley’s family

In this paper, a complex dynamical study of a parametric Chebyshev-Halley type fam- ily of iterative methods on quadratic polynomial is presented. The stability of the fixed points is analyzed in terms of the parameter of the family. We also calculate the crit- ical points building their corresponding parameter planes which allow us to analyze the qualitative behaviour of this family. Moreover, we locate some dynamical planes showing different pathological aspects of this family.
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Élargissement de l'empire de la justice transitionnelle: Réaffirmation de la valeur de la transition paradigmatique

Élargissement de l'empire de la justice transitionnelle: Réaffirmation de la valeur de la transition paradigmatique

The expansion of the conception of justice, while com- mendable, has placed some strain on the conception of what is ‘transitional’. This element of the field has always been somewhat elusive, its very liminality making it ad- verse to precise definition. The scope of TJ has always been contested spatially in terms of geographical area and type of injustice. As the mechanisms and contexts it applies to proliferate, it is also contested temporally, to the degree that to label certain processes ‘transitional’ risks concep- tual incoherence. The focus on crimes of the past opens up the possibility of retrospective accountability in the demo- cratic future far beyond a point which can truly be said to be transitional or, at the other end of the spectrum, imme- diate accountability for crimes of the past before a transi- tion is reached or even in view. Of course, one can argue that this is merely a semantic point and that ‘transitional justice’ has perhaps outgrown its composite words and no longer simply refers to justice during transition, but rather to processes aimed at dealing with the past generally. Ter- minological inconsistency, it might be argued, should not concern us if the concept of TJ provides a platform and ral- lying point for positive action in redressing past injustices of all types, and can be adjusted to cope with the infinite variation of transitional exigencies. That the expansion of TJ has occurred in response to pressing necessities and blind spots is beyond question. However, at a time when scholars, activists and (perhaps most importantly) funding agencies increasingly question whether TJ can actually jus- tify claims of being able to satisfy those necessities, there may be some advantage in re-examining the elasticity in the conception of transition catalysed by the wider scope of justice.
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How do doctors and nurses manage delirium in intensive care units? A qualitative study using focus groups

How do doctors and nurses manage delirium in intensive care units? A qualitative study using focus groups

An element of group pressure was identi fi ed within the organisation of nursing work, which in fl uenced the decision-making process and patient care. This pressure was in fl uenced by: seniority, duty and group consensus. Regarding seniority, the approval of more experienced nurses was deemed necessary in order to perform certain care measures. A sense of duty was acknowl- edged as nurses felt they could not stop performing certain care measures because these were seen as part of their duty ‘ as nurses ’ (timetable control, postural changes), despite the fact that these procedures could cause patients discomfort, and because failure to do so could lead to criticism by the nurses in the ensuing shift. Finally, a ‘ non-written rule ’ was described in which the implementation of new protocols or care procedures had to be approved by the remaining nurses in the ICU. Things could not be performed differently or against the group ’ s opinion. Some nurses described a feeling of fear associated with performing changes to an already established work routine or any other innovation.
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The use of You and Thou in The Two Gentlemen of Verona

The use of You and Thou in The Two Gentlemen of Verona

The aim of this paper is to analyse the different factors which determine the choice of one of the two variants of the second person singular pronoun, You or Thou, by the various chara[r]

12 Lee mas

The role of morphology in the process of language acquisition and learning

The role of morphology in the process of language acquisition and learning

Word formation rules allow the combination, in a fixed order, of words and affixes and affixes and words to form new derived and compound lexical units.. They opérate on words and affi[r]

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“I am not one of his followers”: The Rewriting of the Cultural Icon of the Virgin in Colm Tóibín’s The Testament of Mary

“I am not one of his followers”: The Rewriting of the Cultural Icon of the Virgin in Colm Tóibín’s The Testament of Mary

In Tóibín’s novel, the Crucifixion scene acquires a whole new meaning. Disguised with her companions among the crowd, Mary witnesses with horror her son’s procession carrying the Cross, his face all bloody and the crown of thorns pushing into his forehead. On the hill, she is horrified when she hears Jesus’s howls of pain. Paralysed by terror, Mary and her companions remain still and silent, aware that they could also receive a similar punishment. When she notices that they are being singled out, Mary herself insists that they must escape. Guilt consumes the mother as she confesses that “perhaps I was right to save myself when I could. But it does not feel like that now and it never has. But I will say it now because it has to be said by someone once: I did it to save myself” (85). In contrast to the religious figure of the Holy Mother that all believers turn to when they are in despair, Tóibín’s depiction of Mary offers no romanticism, no consolation, no final and comforting union, no self-sacrificing mother. Years later, the sheer violence of the Crucifixion still preys on Mary’s mind. Surprisingly, she also reveals that “despite the pain that I felt, a pain that has never lifted, and will go with me into the grave, despite all of this, the pain was his and not mine” (84). Indeed, a recurring image in Christian art is that of statues and pictures of a weeping Virgin holding a mortally wounded Jesus in her arms, the human mother and the divine son united in total suffering. In the case of Tóibín’s narrative, her pain is no longer a mere symbol, an artistic cliché, a means to show a pure heart or a communion with God. Mary’s pain, filled with remorse and regret, is private and uniquely her own.
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Coming out of the closet "six feet under": textual silences and the social construction of the family stage in the obituary genres

Coming out of the closet "six feet under": textual silences and the social construction of the family stage in the obituary genres

The present study examines the 'Family stage' from a study corpus of more than two hundred obituaries and death notices published in diverse American newspapers and in the four nationa[r]

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Comportamiento de causalidad en el espacio-tiempo de Carter

Comportamiento de causalidad en el espacio-tiempo de Carter

With this background in mind, it is interesting to ask if, in last definition 3.7 and in definition 3.2, it would be possible to relax the condition of strongly causal to just causal. As a matter of fact, it has been shown that since it is possible to do it in definition 3.3, it is inmedi- ately possible to do it in definition 3.2 (see [3]). For the other case, we tried to find a counterexample in Carter spacetime, because it seemed to be the best candidate due to the literature. Indeed, this spacetime is very sim- ple and, since it is a foliation of compact manifolds, if the time separation or Lorentzian distance was finite for the metric g, then it would also be finite for every met- ric conformal to the original. However, as proven in Proposition 2.1, Carter spacetime does not work as a counterexample. In any case, this result is interesting per se and yields some implications and ideas for alter- nate approaches described in the following section.
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“Sons of Two Empires”: The Idea of Nationhood in Anzac and Turkish Poems of the Gallipoli Campaign

“Sons of Two Empires”: The Idea of Nationhood in Anzac and Turkish Poems of the Gallipoli Campaign

LMR?@JC QR?EC UFCPC RFCW NPMTCB RFCGP UMPRF ?Q RFC BCQACLB?LRQ MD ? KGEFRW CKNGPC (MUCTCP AMLRP?PW RM RFCQC CQR?@JGQFCB TGCUQ KMPC PCACLR QRSBGCQ GKNJW RF?R RFC GLDJSCLAC MD RFC A?KN?GEL U?Q LMR ?ARS?JJW OSGRC JGIC GR F?B ?JU?WQ @CCL BCNGARCB 5LBCPKGLGLERFCqKWRFr?@MSRRFC@GPRFMD?LRGNMBC?LL?RGMLQ4FMKQML?PESCQRF?RRFC PC?J KMRGTCQ @CFGLB RFC qQ?APCB ?LB SL?QQ?GJ?@JCr QRMPW MD RFC !LX?AQ U?Q MLJW ? EMTCPLKCLRBCQGELCB ?RRCKNR RM AMTCP SN RFC D?GJSPC MD RFC "PGRGQF %KNGPC ?LB FCP BMKGLGMLQGLRFCDGPQRF?JDMDRFC'PC?R7?P (C@CJGCTCQRF?RRFCQRMPGCQ?@MSR RFC@P?TCPWMDRFC!LX?AQGL'?JJGNMJGUCPCA?PCDSJJWAP?DRCBqKWRFQr?LBPCQC?PAFCPQ LCCBqRMAF?JJCLECFGQRMPGA?JKWRFQRF?RCKNMUCPQMKCNCMNJC?RRFCCVNCLQCMDMRFCPQr ;4;6 !QGKGJ?PNMGLRMDTGCUGQ?JQM?BTMA?RCB@W,?DDGL"?QCBMLRFCAPGRGAGQK
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Concentraciones críticas nutrimentales y normas DRIS para árboles de medio turno de Cedrela odorata L.

Concentraciones críticas nutrimentales y normas DRIS para árboles de medio turno de Cedrela odorata L.

Verification of critical concentrations and DRIS standards in the field According to Table 7, when applying the fertilization experiment to the critical concentrations in the present study, the absolute control showed deficiencies of N, P, K and Mg; however, the most deficient nutrient was K and IDAP was 0.25 cm. Based on this diagnosis, a second treatment of the fertilization experiment was selected (Table 7), which provided 600 g of potassium sulfate and 600 g of urea. The foliar analysis indicated that the application of the aforementioned materials caused an increase in the foliar concentrations of N and K. When applying the generated critical concentrations to this treatment, K proved to be still the most deficient nutrient, but the N deficiency was counteracted. This treatment increased the IDAP from 0.25 cm to 1.27 cm; that is, there was an increase five times higher than that of the absolute control. Such increase means that the critical concentrations developed in the present study correctly predicted the nutritional status of the absolute control.
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Predictive value of the number of symptoms during pH monitoring for the diagnosis of Gastroesophageal Reflux Disease

Predictive value of the number of symptoms during pH monitoring for the diagnosis of Gastroesophageal Reflux Disease

hypothesis with a likelihood ratio of only 1.1 to not ex- perience symptoms during pHmonitoring in GERD - patients. On the other side, we theorized that hypersen- sitivity, hypervigilance and psychiatric disorders would bring a higher number of symptoms during the test in GERD - patients. Again, our results; however, showed a higher number of symptoms in GERD + patients. Hypersensitivity occur in patients with symptoms trig- gered by reflux events despite normal acid exposure. 12

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Bologna Process within the Italian University

Bologna Process within the Italian University

Diploma Supplement: the European Commission, the Council of Eu- rope and the UNESCO/CEPES collaborated to work out the Diploma Sup- plement, aiming at improving international transparency and at facilitating the academic and professional recognition of qualifications (diplomas, de- grees, certificates etc.). In a widespread European language, the Supple- ment – attached to the higher education diploma – describes the nature, lev- el, context, content and status of the studies carried out and completed. The Diploma Supplement provides further information about the system of high- er education of the issuing country, so that it becomes possible to set the diploma within the educative context of reference.
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Acetone gas sensor based on α Ag2WO4 nanorods obtained via a microwaveassisted hydrothermal route

Acetone gas sensor based on α Ag2WO4 nanorods obtained via a microwaveassisted hydrothermal route

This manuscript addresses the gas sensing properties of 1D α -Ag 2 WO 4 nanorod- like structures obtained by MAH route. The morphological characteristics of as- prepared nanorods were analyzed by field emission scanning electron microscopy (FE- SEM). The α -Ag 2 WO 4 nanorods were tested for the detection of acetone, ethanol, and ammonia. The gas sensing experiments performed at 350 o C revealed their higher sensitivity to acetone in comparison to other gases, fast response-recovery time and excellent repeatability.
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TítuloOptimization of "Saccharomyces cerevisiae" α galactosidase production and application in the degradation of raffinose family oligosaccharides

TítuloOptimization of "Saccharomyces cerevisiae" α galactosidase production and application in the degradation of raffinose family oligosaccharides

ScAGal not only has strong resistance to treatment with all the proteases tested, but also a higher enzy- matic activity in their presence (Fig.  3a). After 37 °C for 1  h with trypsin, chymotrypsin, proteinase K, subtili- sin and pepsin, the enzyme’s residual activity was 122, 132, 142, 117 and 164%, respectively, varying slightly up to 16  h. The protease resistance of several α-Gals has been tested, but it was noted that most trials used short incubation times of 30–60  min, without longer incu- bation times being tested. ScAGal was more protease- resistance compared to most others. The enzymes PCGI from Pleurotus citrinopileatus [23] and Aga-BC7050 [38] were activated with α-chymotrypsin and trypsin, but were inhibited by proteinase K. ABGI from Agari- cus bisporus only showed resistance to α-chymotrypsin [34]. TtGal27A from Thielavia terrestris [32], PDGI from Pleurotus djamor [35] and rAgas2 isolated from the gut metagenome of Hermetia illucens [42] retained 90, 60 and 70%, respectively, of the initial activity in the pres- ence of neutral proteases. On the other hand, the degly- cosylated ScAGal was also slightly activated by pepsin (103% residual activity) and showed strong resistance to subtilisin (98% residual activity), and some tolerance to trypsin (52% residual activity), chymotrypsin (53% residual activity) and proteinase K (45% residual activity) after 1 h treatment (Fig. 3b). In the food and feed indus- try, combinations of enzymes are used, including α-Gals,
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Analysis of the Impact of Problem Based Learning: An Innovation in the Teaching-Learning Process to Enhance the Development of Writing Abilities in the English Language-Edición Única

Analysis of the Impact of Problem Based Learning: An Innovation in the Teaching-Learning Process to Enhance the Development of Writing Abilities in the English Language-Edición Única

Observation reference points for the research about the impact of using Problem- based learning in the development of writing skills and critical thinking in English as a foreign langua[r]

224 Lee mas

Making use of the Food and Drug Administration briefing documents to reconsider the safety of the antipsychotic sertindole

Making use of the Food and Drug Administration briefing documents to reconsider the safety of the antipsychotic sertindole

The FDA’s SCoP analysis was made public in April 2009 and the journal publication appeared 18 months later in November 2010. Sertindole’s manufacturer funded the published SCoP trial but it is not known if the SCoP authors where aware of the FDA sudden cardiac death analysis at the time their manuscript was being prepared. Nevertheless, briefing documents have been posted on the FDA’s Web site since 2000 and are indexed in Iowa Drug Information Service (IDIS) from the University of Iowa College of Pharmacy (http://itsnt14.its.uiowa.edu). These documents are in the public domain and can be freely used with proper attribution.
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