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Search Results: 1 - 10 of 403471 matches for " Mónica;Vences "
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Influence of temperature and humidity on the biology of Triatoma mexicana (Hemiptera: Reduviidae: Triatominae) under laboratory conditions
Martínez-Ibarra, José Alejandro;Salazar-Schettino, Paz María;Solorio-Cibrián, Miriam;Cabrera Bravo, Margarita;Novelo-López, Mónica;Vences, Mauro Omar;Montes-Ochoa, Jazmín Yesenia;Nogueda-Torres, Benjamín;
Memórias do Instituto Oswaldo Cruz , 2008, DOI: 10.1590/S0074-02762008000700015
Abstract: several biological parameters related to the triatoma mexicana life-cycle were evaluated in this study. three cohorts were maintained under different combinations of temperature and relative humidity (rh): 25oc/50% rh; 25oc/75% rh; and 30oc/75% rh. observed hatching rates varied from 49-57.5% whereas the average time of hatching varied from 19.5-22.7 days. in the three cohorts studied, the mean time-lapse between presentation of the blood meal and the beginning of feeding was less than 5 min in all instars; the mean feeding time was longer than 10 min in all the instars; the post-feed defecation delay was over 10 min in all the instars. less than 50% of nymphs in each cohort completed the cycle and the average time from 1st instar nymph to adult was more than 255 days for the three cohorts. the number of blood meals before molt at each nymphal instar varied from 1-9. our results appear to indicate a lack of influence of temperature and rh on the biological parameters of t. mexicana that were studied, which could reflect the adaptation capacity of this species. we also conclude that t. mexicana can not be considered an effective transmitter of trypanosoma cruzi to human populations in areas where this species is currently present.
Facts and Perceptions Regarding Software Measurement in Education and in Practice: Preliminary Results  [PDF]
Mónica Villavicencio, Alain Abran
Journal of Software Engineering and Applications (JSEA) , 2011, DOI: 10.4236/jsea.2011.44025
Abstract: How is software measurement addressed in undergraduate and graduate programs in universities? Do organizations consider that the graduating students they hire have an adequate knowledge of software measurement? To answer these and related questions, a survey was administered to participants who attended the IWSM-MENSURA 2010 conference in Stuttgart, Germany. Forty-seven of the 69 conference participants (including software development practitioners, software measurement consultants, university professors, and graduate students) took part in the survey. The results indicate that software measurement topics are: 1) covered mostly at the graduate level and not at the undergraduate level, and 2) not mandatory. Graduate students and professors consider that, of the measurement topics covered in university curricula, specific topics, such as measures for the requirements phase, and measurement techniques and tools, receive more attention in the academic context. A common observation of the practitioners who participated in the survey was that students hired as new employees bring limited software measurement-related knowledge to their organizations. Discussion of the findings and directions for future research are presented.
Relevance of Epistemological Pluralism for Resource Management Policies  [PDF]
Mónica Gómez Salazar
Open Journal of Philosophy (OJPP) , 2015, DOI: 10.4236/ojpp.2015.56039
Abstract: The common believe of a single successful form of knowing the reality is misleading. A brief analysis of many human activities reveals a pluralistic perspective of several coexisting conceptual schemes that underlie the form in which women and men know and constitute the world in which we live. Here, I will discuss the necessity of taking seriously this pluralistic perspective when developing conceptual frameworks of human activities. As an example of great interest and importance, I will consider the case of resource management that has to contemplate the conservation and the response of ecosystems to human activities that may lead to irreversible damage. Ecosystems’ activity occurs over a wide range of space and time scales and, hence, policies and proposals of solutions to ecological problems should avoid narrow and monochromatic approaches. Specifically, the Pemon perspective of fire is a good example to show that for more robust and flexible resource management we need the knowledge and experience of different cultural and disciplinary groups.
Rivaling the World's Smallest Reptiles: Discovery of Miniaturized and Microendemic New Species of Leaf Chameleons (Brookesia) from Northern Madagascar
Frank Glaw, J?rn K?hler, Ted M. Townsend, Miguel Vences
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0031314
Abstract: Background One clade of Malagasy leaf chameleons, the Brookesia minima group, is known to contain species that rank among the smallest amniotes in the world. We report on a previously unrecognized radiation of these miniaturized lizards comprising four new species described herein. Methodology/Principal Findings The newly discovered species appear to be restricted to single, mostly karstic, localities in extreme northern Madagascar: Brookesia confidens sp. n. from Ankarana, B. desperata sp. n. from Forêt d'Ambre, B. micra sp. n. from the islet Nosy Hara, and B. tristis sp. n. from Montagne des Fran?ais. Molecular phylogenetic analyses based on one mitochondrial and two nuclear genes of all nominal species in the B. minima group congruently support that the four new species, together with B. tuberculata from Montagne d'Ambre in northern Madagascar, form a strongly supported clade. This suggests that these species have diversified in geographical proximity in this small area. All species of the B. minima group, including the four newly described ones, are characterized by very deep genetic divergences of 18–32% in the ND2 gene and >6% in the 16S rRNA gene. Despite superficial similarities among all species of this group, their status as separate evolutionary lineages is also supported by moderate to strong differences in external morphology, and by clear differences in hemipenis structure. Conclusion/Significance The newly discovered dwarf chameleon species represent striking cases of miniaturization and microendemism and suggest the possibility of a range size-body size relationship in Malagasy reptiles. The newly described Brookesia micra reaches a maximum snout-vent length in males of 16 mm, and its total length in both sexes is less than 30 mm, ranking it among the smallest amniote vertebrates in the world. With a distribution limited to a very small islet, this species may represent an extreme case of island dwarfism.
The integrative future of taxonomy
José M Padial, Aurélien Miralles, Ignacio De la Riva, Miguel Vences
Frontiers in Zoology , 2010, DOI: 10.1186/1742-9994-7-16
Abstract: Integrative taxonomy has been proposed as a framework to bring together these conceptual and methodological developments. Here we review perspectives for an integrative taxonomy that directly bear on what species are, how they can be discovered, and how much diversity is on Earth.We conclude that taxonomy needs to be pluralistic to improve species discovery and description, and to develop novel protocols to produce the much-needed inventory of life in a reasonable time. To cope with the large number of candidate species revealed by molecular studies of eukaryotes, we propose a classification scheme for those units that will facilitate the subsequent assembly of data sets for the formal description of new species under the Linnaean system, and will ultimately integrate the activities of taxonomists and molecular biologists.There is little doubt that the central unit for taxonomy is the species, and that associating scientific names unequivocally to species is pivotal for a reliable reference system of biological information [1]. Since the advent of Linnaean nomenclature in 1758, taxonomists have been describing and naming thousands of species every year--currently around 15.000-20.000 among animals only [2,3]--numbers that rapidly increase for many groups of organisms due to the incorporation of new tools for discovery and the exploration of poorly known areas of the planet [4-8]. Indeed, this progress is being made possible despite important impediments [9] because species taxonomy is resurging as a solid scientific discipline [10] that incorporates technological advances, such as virtual access to museum collections [11], high-throughput DNA sequencing [12], computer tomography [13], geographical information systems [14], and multiple functions of the internet [15]. Also, taxonomic information is increasingly digitized and made available through several global initiatives, such as Species2000, The Encyclopaedia of Life (EOL), The Global Biodiversity Information Fac
Manifestaciones de la religiosidad popular en torno a tres imágenes marianas originarias: la unidad del ritual y la diversidad formal
Vences Vidal, Magdalena;
Latinoamérica. Revista de estudios Latinoamericanos , 2009,
Abstract: the article deals about the popular religiosity through the cult to three marian images during the colony: "the virgen de guadalupe del tepeyac" (mexico), the "virgen del rosario de chiquinquirá" (colombia) and "the virgen de el quinche" (ecuador). this three hispanic-american cases are a reference the author uses to reflect, in the first part, about the concept used to explain the religious behavior of the people -mainly the religiosity, the popular and the official-; through spanish authors which study those concepts, exposes the roll the external collective manifestations had about the images and phenomena like miracles and celebrations. in the second part, the author describes the means used to strengthen and to expand the cult to sacred images and she highlights the important roll that the translation of those images and their reproductions had. finally she analyses the concepts of culture and baroque.
Magdalena Vences Vidal
Latinoamérica. Revista de estudios Latinoamericanos , 2009,
Abstract: El artículo aborda el tema de la religiosidad popular a través del culto a tres imágenes marianas durante la Colonia: la Virgen de Guadalupe del Tepeyac (México), la Virgen del Rosario de Chiquinquirá (Colombia) y la Virgen de El Quinche (Ecuador). Estos tres casos hispanoamericanos son referente para que la autora reflexione, en la primera parte, sobre los conceptos utilizados para explicar el comportamiento religioso del pueblo-principalmente la religiosidad, lo popular y lo oficial-; a partir del análisis de autores espa oles que tratan estos conceptos, expone el papel que desempe aron las manifestaciones colectivas externas en torno a las imágenes y fenómenos como el milagro y la fiesta. En la segunda parte, la autora describe los medios usados para afianzar y expandir el culto a las imágenes sagradas, en donde destaca el importante papel que tuvieron los traslados de las imágenes y sus reproducciones plásticas. Finalmente, analiza los conceptos de cultura y del barroco.
A Matching Model on the Use of Immigrant Social Networks and Referral Hiring  [PDF]
Mónica García-Pérez
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.24070
Abstract: Using a simple search model, with urn-ball derived matching function, this paper investigates the effect of firm owner’s and coworkers’ nativity on hiring patterns and wages. In the model, social networks reduce search frictions and wages are derived endogenously as a function of the efficiency of the social ties of current employees. As a result, individuals with more efficient connections tend to receive higher wages and lower unemployment rate. However, because this efficiency depends on matching with same-type owners and coworkers, there is also a differential effect among workers’ wages in the same firm. This analysis highlights the potential importance of social connections and social capital for understanding employment opportunities and wage differentials between these groups.
Assessing spatial genetic structure from molecular marker data via principal component analyses: A case study in a Prosopis sp. forest  [PDF]
Ingrid Teich, Aníbal Verga, Mónica Balzarini
Advances in Bioscience and Biotechnology (ABB) , 2014, DOI: 10.4236/abb.2014.52013

Advances in genotyping technology, such as molecular markers, have noticeably improved our capacity to characterize genomes at multiple loci. Concomitantly, the methodological framework to analyze genetic data has expanded, and keeping abreast with the latest statistical developments to analyze molecular marker data in the context of spatial genetics has become a difficult task. Most methods in spatial statistics are devoted to univariate data whereas the nature of molecular marker data is highly dimensional. Multivariate methods are aimed at finding proximities between entities characterized by multiple variables by summarizing information in few synthetic variables. In particular, Principal Component analysis (PCA) has been used to study genetic structure of geo-referenced allele frequency profiles, incorporating spatial information with a posteriori analysis. Conversely, the recently developed spatially restricted PCA (sPCA) explicitly includes spatial data in the optimization criterion. In this work, we compared the results of the application of PCA and sPCA in the study of the spatial genetic structure at fine scale of a Prosopis flexuosa and P. chilensis hybrid swarm. Data consisted in the genetic characterization of 87 trees sampled in Córdoba, Argentina and genotyped at six microsatellites, which yielded 72 alleles. As expected, principal components explained more variance than sPCA components, but were less spatially autocorrelated. The maps obtained by the interpolation of sPC1 values allowed a better visualization of a patchy spatial pattern of genetic variability than the PC1 synthetic map. We also proposed a PC-sPC scatter plot of allele loadings to better understand the allele contributions to spatial genetic variability.

Recognition in the Communication Processes of Diverse Young the Experience of Living in a Park in the City of Cali  [PDF]
Mónica Marión Cata?o
Advances in Journalism and Communication (AJC) , 2015, DOI: 10.4236/ajc.2015.31004
Abstract: Artisan Park La Loma de la Cruz, is a park located in a suburb of the city of Cali, a place where different groups converge youth from youth cultures. The park is a place for meeting, socializing, communication practices through which young people interact and build relationships. The park is set up as a stage of “coexistence” in which rockers, punks, emos, skaters and members of the LGBTI community stay together and share the same dwelling place (Figure 1). In the worlds of life of these young people, the words in different languages are a part of his being and his feelings, hence the affectations of joy and sadness, as defined by Spinoza (1980)1, are a way of weaving links and establish relationships communication. It is also possible to identify forms of recognition, Honneth’s way, recognition of love and solidarity2. These forms of recognition collide when young people, relate to the adult world, in the park, are made by artisans, police and neighbors. From the adult world, the form of contempt is evident in the rejection of the young by their expressions, especially those with expressing his affectations manifest. If young people recognize the existence of other people, as well as their own differences in the way they think, if they recognize the action in their own inter-subjective relationships and in the same way they construct a “we”, we would be spectators of new ways of being together; of ethical and political linking which go through new ways of living together and in which the sense and the shared meaning of life are negotiated that show a way of understanding in communication.
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