Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 2 )

2018 ( 16 )

2017 ( 13 )

2016 ( 14 )

Custom range...

Search Results: 1 - 10 of 4906 matches for " MIRIAM; MCALLIS TER "
All listed articles are free for downloading (OA Articles)
Page 1 /4906
Display every page Item
Dosis diagnósticas para vigilar la resistencia a insecticidas de los vectores de malaria en Colombia
Revista Colombiana de Entomología , 2010,
Abstract: the control of mosquito vectors of malaria is largely based on insecticide applications, either on the inside walls of dwellings or on treated nets. for that reason, the surveillance of insecticide resistance in these species is essential for the definition of plans and strategies of malaria control. the purpose of this study was to determine the diagnostic doses of several insecticides used in public health for the main vectors of malaria in colombia: anopheles darlingi, a. albimanus and a. nuneztovari, using the methodology of impregnated bottles developed by the centers for disease control and prevention. natural populations of the three species, submitted to low or no insecticide pressure, were selected with which bioassays were conducted to determine baseline susceptibility. diagnostic doses (insecticide concentration and diagnostic time), or saturation curves, were established for the insecticides lambda-cyhalothrin, deltamethrin, fenitrothion, malathion and ddt for the three vectors; cyfluthrin, permethrin and propoxur for a. albimanus and a. darlingi, and etofenprox and bendiocarb for a. darlingi. the diagnostic doses determined in these susceptible populations will allow an evaluation of the status of insecticide resistance of the main malaria vectors across their distribution in colombia, strengthening the resistance surveillance system and facilitating decision making for a more appropriate use of insecticides to control malaria in the country.
El trabajo cooperativo en la búsqueda de aprendizajes significativos en clase de matemáticas de la educación básica
Terán de Serrentino,Miriam; Pachano Rivera,Lizabeth;
Educere , 2009,
Abstract: the importance of cooperative work in order to achieve meaningful learning in mathematic classes during the first two stages of basic education motivated doing a qualitative study, based on research-action. following the suggested steps for this type of methodology, we performed a diagnose to then design and apply strategies based on cooperative work. during the evaluation we were able to see the importance of cooperative work in mathematic classes, aiming to promote motivation, interaction and meaningful learning. in the conclusions we point out as fundamental characteristics to design cooperative strategies: previous knowledge of the students, attention to the four areas of math (arithmetic, algebra, geometry and statistic), the interrelation with the other curricular areas and the incorporation of playful activities.
Evaluating Cultural and Technical Obstacles in School-Based ICT Programs: An Analysis of Two Case Studies  [PDF]
Miriam Judge
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.49B006

The emergence of a knowledge-based economy has been identified as a central trend in modern economies as a result of the increasingly important role of information technology and learning in economic performance. In recognition of this most governments throughout the developed world have responded with a series of policy initiatives since the late 1990’s to either introduce or significantly increase information technology provision in schools to prepare students for life in the twenty first century. Ireland, with its growing reliance on the knowledge economy sector for employment and continued economic prosperity, developed its own policy initiative for computerizing the nations’ schools known as“Schools IT 2000: A Policy Framework for the New Millennium”. It was an ambitious programme with high expectations for the integration of ICT (Information and Communications Technology) in education. This paper examines two longitudinal educational ICT projects in Ireland in the first decade of the new millennium to query how far schools have travelled along the information superhighway and to ponder how well the catalytic capabilities of ICT have become embedded in the realities of classroom life and teachers pedagogic practices, with attendant implications for Ireland’s economic development.

Excision margins in squamous cell carcinoma of the tongue: A retrospective audit and review of the literature  [PDF]
Miriam Thake, Athanasis Kalantzis
Open Journal of Stomatology (OJST) , 2013, DOI: 10.4236/ojst.2013.31013

The incidence of close and involved tongue resection margins for squamous cell carcinoma (SCC) were reviewed with the aim to identify any possible need for change in the surgical approach to glossectomies. The histopathological reports of 101 partial glossectomies for SCC between 2006 and 2012 were retrospectively reviewed. Results: Overall 52 (51.5%) patients had one or more close or involved margin and 9 (8.9%) had both close and involved margins. 42 (41.5%) patients had close margins and 11 (10.9%) had involved margins. The inferior/lateral muscoal margin was most frequently close/involved (32%) followed by deep margin (27%). The anterior margin was least close/involved (5%). The posterior and superior/medical margins were close/involved in 12% and 11% of cases respectively. Conclusions: 52.5% of patients had close or involved margins following surgery, potentially requiring further treatment to avoid an increased risk of tumour recurrence and the associated increase in morbidity and mortality. The inferior/lateral and deep margins were most frequently involved possible due to the anatomical difficulties visualising and dissecting these margins. The potential explanations for these disparities and possible solutions are discussed.

Rings in which nilpotents form a subring
Janez ?ter
Mathematics , 2015,
Abstract: Let R be a ring with the set of nilpotents Nil(R). We prove that the following are equivalent: (i) Nil(R) is additively closed, (ii) Nil(R) is multiplicatively closed and R satisfies Koethe's conjecture, (iii) Nil(R) is closed under the operation x\circ y=x+y-xy, (iv) Nil(R) is a subring of R. Some applications and examples of rings with this property are given, with an emphasis on certain classes of exchange and clean rings.
Nil Clean Involutions
Janez ?ter
Mathematics , 2015,
Abstract: We prove that if an involution in a ring is the sum of an idempotent and a nilpotent then the idempotent in this decomposition must be 1. As a consequence, we completely characterize weakly nil-clean rings introduced recently in [Breaz, Danchev and Zhou, Rings in which every element is either a sum or a difference of a nilpotent and an idempotent, J. Algebra Appl., DOI: 10.1142/S0219498816501486].
Role of Endocannabinoids and Cannabinoid-1 Receptors in Cerebrocortical Blood Flow Regulation
András Iring, éva Ruisanchez, Miriam Leszl-Ishiguro, Béla Horváth, Rita Benk?, Zsombor Lacza, Zoltán Járai,ter Sándor, Vincenzo Di Marzo, Pál Pacher, Zoltán Benyó
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0053390
Abstract: Background Endocannabinoids are among the most intensively studied lipid mediators of cardiovascular functions. In the present study the effects of decreased and increased activity of the endocannabinoid system (achieved by cannabinoid-1 (CB1) receptor blockade and inhibition of cannabinoid reuptake, respectively) on the systemic and cerebral circulation were analyzed under steady-state physiological conditions and during hypoxia and hypercapnia (H/H). Methodology/Principal Findings In anesthetized spontaneously ventilating rats the CB1-receptor antagonist/inverse agonist AM-251 (10 mg/kg, i.v.) failed to influence blood pressure (BP), cerebrocortical blood flow (CoBF, measured by laser-Doppler flowmetry) or arterial blood gas levels. In contrast, the putative cannabinoid reuptake inhibitor AM-404 (10 mg/kg, i.v.) induced triphasic responses, some of which could be blocked by AM-251. Hypertension during phase I was resistant to AM-251, whereas the concomitant CoBF-increase was attenuated. In contrast, hypotension during phase III was sensitive to AM-251, whereas the concomitant CoBF-decrease was not. Therefore, CoBF autoregulation appeared to shift towards higher BP levels after CB1-blockade. During phase II H/H developed due to respiratory depression, which could be inhibited by AM-251. Interestingly, however, the concomitant rise in CoBF remained unchanged after AM-251, indicating that CB1-blockade potentially enhanced the reactivity of the CoBF to H/H. In accordance with this hypothesis, AM-251 induced a significant enhancement of the CoBF responses during controlled stepwise H/H. Conclusion/Significance Under resting physiological conditions CB1-receptor mediated mechanisms appear to have limited influence on systemic or cerebral circulation. Enhancement of endocannabinoid levels, however, induces transient CB1-independent hypertension and sustained CB1-mediated hypotension. Furthermore, enhanced endocannabinoid activity results in respiratory depression in a CB1-dependent manner. Finally, our data indicate for the first time the involvement of the endocannabinoid system and CB1-receptors in the regulation of the cerebral circulation during H/H and also raise the possibility of their contribution to the autoregulation of CoBF.
Gene frequencies in the blood group systems of the Cuban Charolais
Ribas Miriam
Genetics Selection Evolution , 1981, DOI: 10.1186/1297-9686-13-3-293
Dimensión metropolitana de la globalización: Lima a fines del siglo XX
EURE (Santiago) , 2002, DOI: 10.4067/S0250-71612002008500005
Abstract: the spatial transformation of metropolitan lima represents an important case study because of the dramatic changes in places where people work, live, and play and the relationships among them. this case study sketches important elements to be considered in the development of metropolitan regions, which are expanding their international links. this article includes also a conceptual review of metropolitan spaces and networks, as well as an empirical assessment of the reorganization of metropolitan activities and networks in lima, which have been driven by the ability of local actors to tap international capital and information
Cultura institucional y homogeneizacion mental: un analisis de impacto en universitarios
Interdisciplinaria , 2005,
Abstract: this study tests hypotheses included in the psycho-sociocommunicational paradigm, which emphasizes the long term cognitive effects of the media and the role of the psychosocial subject as recipient: the hypothesis of agenda-setting. the primary objectives were: (1) to elucidate such effects in audiences with different levels of education, (2) to detect levels of manipulation and homogenization of the mental maps linked with the centralization of the fourth power, to ascertain personality factors which condition differential receptivity of the addresses (filter of the news) related to the socio-evaluative context. two lines interest us: the first emphasizes the effects of the media according to individual psychology, and the second, centered on different parameters linked with psychosocial characteristics of the youths and the messages. finally, the central hypotheses are offered, taking into account that forty nine were considered: (a) there would be a marked correlation between the order of importance assigned to the information by the media and the one adopted by youths (high incidence of mental construing), (b) receptivity of the addresses would vary according to cognitive competence and (c) certain psychological characteristics would render the subject less impressionable to media influence. the sample was made up of graduates (n = 516) and drop-outs from eighteen careers in universidad nacional de cuyo (argentina) between 1980-1993. the sampling was stratified and of random start, confidence interval was taken at 95% and error margin at 4%. quanti-qualitative techniques were complemented: semistructured survey, indepth interviews, life stories and anecdote accounts. also, tests were applied in order to observe the behavior of certain psychosocial variables (such as locus of control, stress, aggressiveness, self-esteem). some of these tests (e.g. cep, j.l. pinillos, maudsley's inventory, j. eysenck) have been validated in argentina by the author. the analysis wa
Page 1 /4906
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.