173,034 research outputs found
Catalogue of the Phycological Collection of Miguel Lillo Foundation. Part II: Material from the Kryptogamae exsiccatae
No full textEsta contribución tiene por objetivo dar a conocer el listado del material algal proveniente de la Kryptogamae exsiccatae, editada por el Museo de Historia Natural de Viena, que se encuentra resguardado en la Colección Ficológica de la Fundación Miguel Lillo. Las 489 muestras algales catalogadas están distribuidos en 198 géneros de las divisiones Cyanophyta (131 ejemplares), Chlorophyta (111), Charophyta (87), Rhodophyta (82), Ochrophyta (77) y Dinophyta (1). Los colectores más representados en el material revisado son S. Stockmayer (58 ejemplares), F. Filárszky (39), E. C. Teodorescu (36), C. Rechinger (36) y K. von Keissler (28). El material depositado representa principalmente la Flora Algal Europea de fines del siglo XIX y principios del XX.The aim of this contribution is to introduce the list of algal material coming from the Kryptogamae exsiccatae edited by the Museum of Natural History of Wien and preserved in the Phycological Collec- tion. The 489 algal samples catalogued are distributed among 198 genera of the Divisions: Cyanophyta (131 samples), Chlorophyta (111), Charophyta (87), Rhodophyta (82), Ochrophyta (77) and Dinophyta (1). The most relevant collectors represented in the collection are S. Stockmayer (58 ejemplares), F. Filárszky (39), E. C. Teodorescu (36), C. Rechinger (36) and K. von Keissler (28). The preserved material corresponds mainly to the european algal flora from the late 19th and early 20th centuries.Fil: Bustos, María Soledad. Fundación Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Martínez De Marco, Silvia N.. Fundación Miguel Lillo; ArgentinaFil: Taboada, María de Los Ángeles. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; ArgentinaFil: Mirande, Virginia. Fundación Miguel Lillo; ArgentinaFil: Tracanna, Beatriz Concepcion. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; Argentin
Prefazione
No full textPrefazione a quello che è il frutto del convegno “Il sociologo e le sirene. Nuovi paradigmi per la ricerca sociale”,dedicato al rapporto tra ricerca qualitativa e nuove tecnologie (Web 2.0 in particolare). Se la Rete ha favorito la contaminazione tra pratiche di ricerca di taglio “qualitativo” e “quantitativo”, complessità e caratteristiche della Rete pongono i sociologi di fronte alla necessità di inventare nuovi paradigmi o adeguare quelli già esistenti
Phytoplankton of the Escaba reservoir
No full textEn este capítulo se analizan las variaciones espaciales y temporales del fitoplancton de la zona limnética del embalse Escaba y la desembocadura de sus tributarios: ríos Chavarría, Las Moras, El Chorro y Singuil, respecto a variables físicas y químicas para caracterizar la calidad del agua desde agosto de 2010 a mayo de 2012. Se identificaron 135 taxones pertenecientes a las diatomeas (77), clorofitas (35), cianobacterias (12), carofitas (5), euglenoides (5) y dinoflagelado (1). La densidad algal fluctuó entre 84 a 6924 ind/ml y Ceratium hirundinella fue dominante excepto en primavera de 2011. La clorofila a tuvo un rango variable a nivel temporal y espacial que varió entre 6 y 2511 μg/l, encontrándose mayores registros en los afluentes. Los elevados valores de biomasa y la caracterización polisapróbica de sus aguas determinaron un estado ecológico deficiente o malo. La diversidad específica osciló entre 0-2,76. Por último, se contribuye al conocimiento de la biodiversidad algal del embalse Escaba y se amplía el área de distribución de C. hirundinella en la provincia de Tucumán.This chapter analyzes space-time variations of phytoplankton in the limnetic zone of the Escaba reservoir and the mouths of its tributary rivers, Chavarría, Las Moras, El Chorro and Singuil, considering physicochemical variables in order to characterize the water quality between 2010 and 2012. One hundred and thirty-five taxa were determined: 77 diatoms, 35 chlorophytes, 12 cyanobacteria, 5 charophytes, 5 eugle- noids and 1 dinoflagellate. Algal density varied between 84 and 6,924 individuals/ml with Ceratium hirundinella as the dominant species, except for the spring of 2011. Chlorophyll-a varied seasonally and in space with values between 6 and 2,511 μg/l, with higher numbers for the affluents. Elevated biomass values and the polysapro- bic character of the waters defined a deficient or bad ecological status. The specific diversity oscillated between 0 and 2.76. The present study provides new information regarding the algal biodiversity of the Escaba dam and the distribution area of C. hirundinella in the province of TucumánFil: Martinez Demarco, Solange Romina. Fundación Miguel Lillo. Dirección de Botánica. Instituto de Ficología; ArgentinaFil: Tracanna, Beatriz Concepcion. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; Argentina. Fundación Miguel Lillo. Dirección de Botánica. Instituto de Ficología; ArgentinaFil: Mirande, Virginia. Fundación Miguel Lillo. Dirección de Botánica. Instituto de Ficología; ArgentinaFil: Isasmendi, Sara Celina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; ArgentinaFil: Taboada, María de Los Ángeles. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; Argentina. Fundación Miguel Lillo. Dirección de Botánica. Instituto de Ficología; Argentin
Prefazione
No full textPrefazione a quello che è il frutto del convegno “Il sociologo e le sirene. Nuovi paradigmi per la ricerca sociale” ha avuto come oggetto di studio la ricerca qualitativa colta nelle sue varie e più attuali sfaccettature, il consolidamento delle pratiche di ricerca a orientamento qualitativo, e la ricomposizione tra “quali” e “quanti”, resa necessaria dall’intensificarsi delle tendenze di mutamento sociale. Il testo riporta gli interventi delle varie sessioni
The type specimens of Anthomyiidae, Muscidae and Sarcophagidae (Diptera: Calyptratae) housed at the Instituto – Fundación Miguel Lillo, Tucumán, Argentina
No full textSe estudiaron los ejemplares tipo de Anthomyiidae, Muscidae y Sarcophagidae depositados en la Colección Instituto - Fundación Miguel Lillo (IFML). Un total de 13 especímenes tipo de Anthomyiidae (cuatro especies nominales), 271 especímenes tipo de Muscidae (36 especies nominales) y seis especímenes tipos de Sarcophagidae (cuatro especies nominales) fueron examinados. Se provee información para cada taxón.The type specimens of Anthomyiidae, Muscidae and Sarcophagidae deposited in the Instituto-Fundación Miguel Lillo (IFML) are revised. A total of 13 type specimens of Anthomyiidae (four nominal species), 271 type specimens of Muscidae (36 nominal species), and six type specimens of Sarcophagidae (four nominal species) were examined. Information for each taxa is provided.Fil: Patitucci, Luciano Damián. Dirección Nacional de Instituto de Investigación. Administración Nacional de Laboratorio e Instituto de Salud “Dr. C. G. Malbrán”. Departamento de Vectores; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mulieri, Pablo Ricardo. Dirección Nacional de Instituto de Investigación. Administración Nacional de Laboratorio e Instituto de Salud “Dr. C. G. Malbrán”. Departamento de Vectores; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mariluis, Juan Carlos. Dirección Nacional de Instituto de Investigación. Administración Nacional de Laboratorio e Instituto de Salud “Dr. C. G. Malbrán”. Departamento de Vectores; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
The type specimens of Anthomyiidae, Muscidae and Sarcophagidae (Diptera: Calyptratae) housed at the Instituto – Fundación Miguel Lillo, Tucumán, Argentina
No full textSe estudiaron los ejemplares tipo de Anthomyiidae, Muscidae y Sarcophagidae depositados en la Colección Instituto - Fundación Miguel Lillo (IFML). Un total de 13 especímenes tipo de Anthomyiidae (cuatro especies nominales), 271 especímenes tipo de Muscidae (36 especies nominales) y seis especímenes tipos de Sarcophagidae (cuatro especies nominales) fueron examinados. Se provee información para cada taxón.The type specimens of Anthomyiidae, Muscidae and Sarcophagidae deposited in the Instituto-Fundación Miguel Lillo (IFML) are revised. A total of 13 type specimens of Anthomyiidae (four nominal species), 271 type specimens of Muscidae (36 nominal species), and six type specimens of Sarcophagidae (four nominal species) were examined. Information for each taxa is provided.Fil: Patitucci, Luciano Damián. Dirección Nacional de Instituto de Investigación. Administración Nacional de Laboratorio e Instituto de Salud “Dr. C. G. Malbrán”. Departamento de Vectores; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mulieri, Pablo Ricardo. Dirección Nacional de Instituto de Investigación. Administración Nacional de Laboratorio e Instituto de Salud “Dr. C. G. Malbrán”. Departamento de Vectores; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mariluis, Juan Carlos. Dirección Nacional de Instituto de Investigación. Administración Nacional de Laboratorio e Instituto de Salud “Dr. C. G. Malbrán”. Departamento de Vectores; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
On some arthropods associated with Ficus species (Moraceae) in the Maltese Islands
No full textAn account is given on the 39 arthropod species which were found on different Ficus trees in the Maltese Islands. Seventeen species represent new records for Malta including Anothopoda fici, Asetadiptacus emiliae, Astichus bachmaieri, Ecphylus caudatus, Empoasca alsiosa, Eupristina verticillata, Ficocyba ficaria, Gynaikothrips ficorum, Josephiella microcarpae, Philotrypesis caricae, Pleistodontes sp., Rhaphitelus maculats, Rhyncaphytoptus ficifoliae, Scobicia chevrieri, Silba adipata, Singhiella citrifolii and Zanchius breviceps. Anothopoda fici and Zanchius breviceps, also represent new records for the entire European territory. Of the 39 arthropods, 33 feed on Ficus trees, whereas the rest are either parasitoids or predators of some of these plant feeders. The 33 species which use Ficus as their host-plant spend most of their development on and utilise the aforementioned trees as their main source of food, at least during their larval development.peer-reviewe
The role of social determinants on men's and women's mobility in Italy : a comparison of discriminant analysis and artificial neural networks
No full textThe paper focuses on the role of the spouse's occupation as a resource for mobile individuals, from the perspective that social positions are held by families, rather than by individuals. Three groups are confronted in terms of the role of the key variables and other relevant factors: men whose spouse does not have a paid job (group 1), men and women whose spouse has a paid job (group 2 and 3). The data set is provided by the national survey on social mobility in Italy, carried out in 1985; social achievements of members of the three groups are considered, including social origins and destinations, social position corresponding to respondent's first job, cultural background (educational achievement of respondent's father and mother found), respondent's education and spouse's social position. The techniques used are discriminant analysis and back propagation Neural Networks. Both techniques traced a clear boundary between group 1 and groups 2 and 3, which were discriminated mainly on the basis of the spouse's occupation; Artificial Neural Networks reached better classification results and allowed a deeper insight into the nonlinear effects of the discriminating variables for the three groups
BAYESIAN CONTROL OF THE NUMBER OF SERVERS IN A GI/M/C QUEUING SYSTEM
No full textIn this paper we consider the problem of designing a GI/M/c queueing system. Given arrival and service data, our objective is to choose the optimal number of servers so as to minimize an expected cost function which depends on quantities, such as the number of customers in the queue. A semiparametric approach based on Erlang mixture distributions is used to model the general interarrival time distribution. Given the sample data, Bayesian Markov chain Monte Carlo methods are used to estimate the system parameters and the predictive distributions of the usual performance measures. We can then use these estimates to minimize the steady-state expected total cost rate as a function of the control parameter c. We provide a numerical example based on real data obtained from a bank in Madrid.
Bayesian control of the number of servers in a GI/M/c queuing system
No full textIn this paper we consider the problem of designing a GI/M/c queueing system. Given arrival and service data, our objective is to choose the optimal number of servers so as to minimize an expected cost function which depends on quantities, such as the number of customers in the queue. A semiparametric approach based on Erlang mixture distributions is used to model the general interarrival time distribution. Given the sample data, Bayesian Markov chain Monte Carlo methods are used to estimate the system parameters and the predictive distributions of the usual performance measures. We can then use these estimates to minimize the steady-state expected total cost rate as a function of the control parameter c. We provide a numerical example based on real data obtained from a bank in Madrid
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