5,686 research outputs found
Variación temporal y espacial del flujo de materia total particulada en un lago monomíctico cálido /
No full text\ua0tesis que para obtener el grado de Doctor en Ciencias del Mar y Limnología, presenta Luis Alberto Oseguera Pérez ; asesor Javier Alcocer Durand. viii, 97 páginas :\ua0diagramas. Doctorado en Ciencias del Mar y Limnología\ua0UNAM, Instituto de Ciencias del Mar y Limnología,\ua0201
Dinámica a largo plazo de la biomasa fitoplanctónica en un lago monomíctico cálido tropical /
No full text\ua0tesis que para obtener el grado de Doctor en Ciencias del Mar y Limnología, presenta Vilma Soledad Ardiles Gloria ; asesor Javier Alcocer Durand, Rosalba Alonso Rodríguez, Javier Carmona Jiménez, David Salas de León, Gloria Vilaclara Fatjó. V, 134 páginas :\ua0diagramas. Doctorado en Ciencias del Mar y Limnología\ua0UNAM, Instituto de Ciencias del Mar y Limnología,\ua0201
Selección in situ de presas de protistas picoplanctívoros del Lago Alchichica /
No full text\ua0tesis que para obtener el grado académico de Doctor en Ciencias (Limnología) presenta Fernando Bautista Reyes ; director de tesis: Dr. Miroslav Macek ; comité tutorial: Dr. Javier Alcocer Durand, Dr. Alfonso Lugo Vázquez, Dra. Cecilia Bulit Gámez, Dra. Rosaura Mayén Estrada. 87 páginas :\ua0ilustraciones, diagramas. Doctorado en Ciencias del Mar y Limnología\ua0UNAM, Posgrado en Ciencias del Mar y Limnología,\ua0201
Chironomus alchichica sp. n. (Diptera: Chironomidae) from Lake Alchichica, Mexico
No full textAcosta, Raúl, Prat, Narcís, Ribera, Carles, Michailova, Paraskeva, Hernández-Fonseca, María Del Carmen, Alcocer, Javier (2017): Chironomus alchichica sp. n. (Diptera: Chironomidae) from Lake Alchichica, Mexico. Zootaxa 4365 (1): 53-70, DOI: 10.11646/zootaxa.4365.1.
Estables y precarios : desregulación laboral y estratificación social en España
No full textJavier G. Polavieja.
ill. ; 22 cm.
Translation of: Insiders and outsiders : structure and consciousness effects of labour market deregulation in Spain, 1984-1997.
Thesis (doctoral) -- University of Oxford, 2001
Producción Package "1000 Maneras de matar a Adri"
No full textProyecto del package de producción del cortometraje 1000 maneras de matar a Adri.Correcher Alcocer, A.; Pastor Segura, J. (2012). Producción Package "1000 Maneras de matar a Adri". Universitat Politècnica de València. https://riunet.upv.es/handle/10251/18101Archivo delegad
Imaginar : dibujar y escribir : recorridos pedagógicos alrededor del proyectar junto a Javier Seguí
No full textEn la enseñanza de la arquitectura, el dibujo es tradicionalmente una materia propedéutica que requiere años de entrenamiento hasta conseguir la destreza necesaria para convertirse en herramienta de configuración y en lenguaje de comunicación del proyecto. El requerimiento de un dominio del dibujo eminentemente instrumental es el que encuentra en el año 1957 Javier Seguí, cuando entra en la Escuela Técnica Superior de Arquitectura de Madrid, y también en 1974, al obtener la cátedra de la asignatura de Análisis de Formas Arquitectónicas tras intentar, sin éxito, la cátedra de la asignatura Proyectos Arquitectónicos. Desde entonces, y durante treinta y nueve años como catedrático, ejerce de profesor en el ahora denominado Departamento de Ideación Gráfica Arquitectónica -agrupamiento de asignaturas encuadradas en un área de conocimiento- trabajando junto a un grupo de compañeros y alumnos que intentan desarrollar un proceso de cambio fundamental en la docencia del dibujo para abandonar la pura representación y convertirla en el dibujar para proyectar. Javier Seguí se jubila en el año 2010. Separado de la docencia y la investigación oficial, continúa dibujando y escribiendo, con el objeto de sistematizar y fundamentar todas aquellas prácticas desarrolladas y reivindicar el funcionamiento de la imaginación. Esta actividad de investigación, desde un extrañamiento extremo, permite elaborar tanto un listado de técnicas operativo-imaginarias de arranque de los procesos de proyectar, como reflexionar y recuperar algunas prácticas desarrolladas desde el grado cero y la radicalidad. Esta investigación aborda la práctica docente de Javier Seguí, ligándola a su producción investigadora desde sus propios dibujos, escritos y conversaciones realizadas en un momento en el que la crisis de la asignatura de dibujo es evidente en un contexto universitario desorientado, que constata el fracaso del cambio que Seguí soñara hace medio siglo. ABSTRACT In the teaching of architecture, drawing has traditionally been a propaedeutic subject requiring years of training to achieve the necessary skill to become a language and communication tool for project configuration. The requirement of a drawing domain aseminently instrumental is what Javier Seguí found in 1957 when he entered the Superior Technical School of Architecture of Madrid (Escuela Técnica Superior de Arquitectura de Madrid), and also in 1974, when he was awarded the position of Chair of Analysis of Architectural Forms after trying, unsuccessfully, the Chair of Architectural Projects. Since then, and for thirty-nine years as a Professor, he has taught at what now is called the Department of Architectural Graphic Ideation – group of subjects framed as an knowledge area -, in collaboration with a group of colleagues and students who try to develop a process of fundamental change in the teaching of drawing, through the abandonment of pure representation to transform drawing into a project. Javier Seguí retired in 2010. Separated from official teaching and research, he maintains a consistent practice of drawing and writing, in order to systematize and substantiate all practices developed and claim the use of the imagination. This research activity, from a one end distance, allows both a list of imaginary operational techniques to the start-up project processes, as much as recovering some practices developed from scratch and of a radical technical degree. This research addresses the teaching practice of Javier Segui, linking its research output of their own drawings, writings and conversations in a moment in which the crisis of the drawing subject is evident in a disoriented university context, demonstrating the failure of the exchange that Seguí has dreamed of since half a century ago
Planificación agregada de la producción en una empresa de suministros de automoción
No full text[ES] Se va a proceder en este proyecto a realizar un breve estado del
arte de la problemática que genera el diseño, la planificación y la gestión
de los sistemas de la producción en las empresas, en concreto, dentro de
la cadena de suministro ya que en ella se encuentran ubicados los dos
procesos de planificación a estudiar y más tarde a realizar: la previsión de
la demanda y planificación agregada de la producción. Todo ello, en el
sector de los recambios y accesorios para vehículos a motor, sector con un
porcentaje cómodo dentro de la economía de la Comunidad Valenciana.Cumplido Alcocer, J. (2013). Planificación agregada de la producción en una empresa de suministros de automoción. https://riunet.upv.es/handle/10251/180131Archivo delegad
Candona alchichica Acosta & Prat & Ribera & Michailova & Hernández-Fonseca & Alcocer 2017, sp. n.
No full textChironomus alchichica Acosta & Prat, sp. n. Type material Holotype: male (preparations in Euparal), obtained by breeding from larvae collected in Lake Alchichica (50 m deep), state of Puebla, Mexico (19°24.7’ N, 97°24.0’ W), 3.VI.2012 (CRBA 67541), Leg. J. Alcocer. Paratypes: 6 males (CRBA 67542- 67544), 3 pupae (CRBA 67552), 10 larvae (CRBA 67545- 67551) (preparations in Euparal), same locality as holotype, 02.I.2012, 02.V.2012, 03.VI.2012, 03.VII.2012, 04.XI.2012, Leg. J. Alcocer. Etymology. This species is named for the type locality of the specimens. Description. Male imago (Fig. 1) (n= 7). Total length 3.95–5.07, 4.34; wing length 2.99–4.25, 3.53; total length / wing length 1.19–1.41, 1.28; wing length/length of profemur 2.64–3.94, 3.14. Coloration. Head capsule and maxillary palps, yellowish brown. Eyes and antennal flagellum, dark brown. Thorax, dark brown with mesonotal stripes. Abdomen, pale brown, dorsally with dark brown markings on tergites I–VII, wider on tergite VII. Legs with all segments uniformly pale yellow. Head. Antennal flagellum: 1399–1621.1510; AR=3.75–3.83 3.79. Clypeus with 15–20 (6) setae, 30–40 (5) temporal setae. Palpomere lengths 2–5: 40–55.16, 47.12; 130.16–190, 171.46; 172–205, 188.89; 219.45–255, 244.76. Wings. Membrane transparent without setae. Alula and axillary area with brown spots. R 2+3 very thin, ends near to edge of wing. Sc, R, R2+3, M1+2, M3+4, Cu, Cu1 and An, pale brown; C, M, R1, R4+5 and RM dark brown. Squama with 20–26 (7) setae. Brachiolum with 2 (9) setae. R, R1 and R4+5 with 20–27 (9); 20–24 (9); 20–24 (8) setae respectively. M without setae. VR =0.91–0.95, 0.94. Legs (Fig. 1a). Segments lengths and main proportions are given in Table 1. Fore tibia with 2–3 thick apical setae. Mid and hind tibial combs with 2–5 short spurs. Pulvilli developed. Genitalia (Fig. 1b and c). Anal point proximally triangular, 61.73–70.88, 65.5. Superior volsella curved in the apex with an expanded knob, 112.68–131.96, 123.36. Gonostylus elongate 178.62–204.85, 195.4 long with 13–15 (7), 6–8 (7) and 6–7 (7) setae in the basal, medium and distal part, respectively. Gonocoxite short, 95.23–118.54, 105.19 long. HR: 0.47–0.64, 0.54. HV: 2.01–2.53, 2.26. Pupa (n = 3) (Fig. 2). Mean length of abdomen: 4.9–6.2, 5.4. Cephalothorax: cephalic tubercles conical: 145.2–209.72, 120.52; frontal setae: 46.32–99.6, 70.23; thoracic horn basal ring: 107.42–137.56, 122.44. Thorax is scarcely granulose (Fig. 2a). Thoracic chaetotaxy: two precorneal, four dorsocentral and antepronotal setae indistinguishable. Abdomen: without dorsal shagreenation patches evident. Abdominal segment II has a continuous row of hooklets (Fig. 2b). The spinules of tergite III–V diminish in size from the posterior to the anterior end. Spinules of tergite II, VI and VIIII are reduced, tergite VII without spinules (Fig. 2c). Pedes spurii B and A well developed on segments II and IV respectively. Segments I –IV=0, 3, 3, 3 lateral setae; V–VIII= 4, 4, 4, 5 lateral taeniae. Segment VIII spur with 5–6 apical teeth (Fig. 2d). Anal lobe on each side with more than 115 taeniate fringe setae. Larva (n=10) (Fig. 3). Body colour (live) bright red, at larva stage IV about 9–10 mm in length, with short posterolateral tubules (LT) on abdominal segment VII (Fig. 3a) and two pairs of ventral tubules (VT) on abdominal segment VIII (Fig. 3b), the anterior with “elbows” and the posterior coiled. Ventral head length: 0.26–0.31, 0.28. Frontoclypeus light brown or yellowish, with the gular region slightly darker (Fig. 3c). Mandible (Fig. 3d). Three very dark teeth (3, 4, 5). The rudimentary 1 st tooth is visible only in certain positions of the mandible. The 2nd and 6th teeth (fused or only partially free) are pale and well seen- a good diagnostic marker of the species. The 6th tooth is fused or only partially free. The pecten mandibularis is very sharp at the apical end. Antenna (Fig. 3e). Consists of 5 segments. Basal antennal segment 105.7–151.67, 118.23 long. The 3rd segment is smaller than the 4th segment, the 5th segment is the smallest. Segments (2–5): 29.69, 8.55, 15.98 and 7.8 long. AR: 1.69–2.39, 1.9. Antennal blade extends to the end of the antenna, 57.76–72.01, 65.8 long. Ring organ (RO) is located on the basal segment about one third of the length of the segment up (0.18–0.29, 0.23). Lauterborn organ (LO) is visible. Mentum (Fig. 3f). Teeth are dark with a median tooth trifid. The accessory tooth (c2) is slightly separated from the median tooth. The 4th lateral tooth is smaller than the 3rd and its height is similar to the 5th. The 6th tooth is pale and is the smallest. The anterior edge of the ventromental plate is smooth (Fig. 3g). Premandible (Fig. 3h). Pale, with two teeth. Ventral tooth thinner and slightly longer than the dorsal tooth, which is significantly larger. Pecten epipharyngis consists of a single comb with 13–14 simple teeth. Diagnostic characters: Adults. The male of C. alchichica sp. n. can now be distinguished from the other previously described species of Chironomus by its relatively small size, antennal ratio (AR) and bristle ratio (BR) of lower than 2, as well as its triangular anal point and its superior volsella (SV) that sharply attenuates to a point with an expanded knob (Type E, according to Strenzke 1959 and Martin 2017). Pupae. The pupae are smaller than 10mm. The thorax is scarcely granulose and there are no spinules in the pleura of the IV segment. In segments III –V, the spinules of the tergite diminish in size from the posterior to the anterior end. The species is distinguished by the presence of 9–10 spines on the spur of abdominal segment VIII. Larvae: According to the classification of types from Martin (2017), Proulx et al. (2013), Vallenduk & Moller Pillot (1997) and Webb & Scholl (1985), the larvae of C. alchichica sp. n. is of the “ plumosus - type ” since abdominal segment VIII has long anterior ventral tubules (VT) with “elbows” and a coiled posterior VT. In addition, abdominal segment VII has short lateral tubules. The head capsule is light brown without dark bands in the clypeus and the gula is mostly colourless. The mentum has six pairs of dark lateral teeth, the median tooth is trifid and does not have a basal part more narrow than the median part. The c2 teeth are slightly separated (Type IB), and the 4th lateral teeth are smaller, their height being about equal to that of the 5th lateral teeth (Type II), the last tooth are small. The mandible is Type IA with the 6th tooth (3rd inner) fused and lighter in colour than the others. The ventromental plates have a smooth anterior edge. The antenna has 5 antennomeres, the last one is very small in size, and the 3rd antennomere is shorter than the 2nd and 4th. The Ring organ (RO) is less than one third up from the base of the segment. The AR is higher than 1.5. Karyological description (Fig. 4). This species belongs to thummi cytocomplex (Keyl 1962), with chromosome arm combinations: AB CD EF G. It has three Balbiani rings (BRs), located on arms B and G, as well as three Nucleolar Organizers (NORs) on arms C, D and G. Those on arms C and D are not always well expressed in all studied cells. The chromosomes are very compact and have high levels of polyteny, which make analysis very difficult. Few cells with good band patterns of the polytene chromosomes were available for analysis. Chromosomes AB and CD are metacentric, chromosome EF is submetacentric, and chromosome G is acrocentric. The centromere regions in chromosomes AB CD and G appeared as dark heterochromatic bands, while those on chromosome EF had the appearance of a thin band (Fig. 4a). Arm A (Fig. 4b): Can be distinguished from C. riihimaekiensis via three steps of fixed homozygous inversion. C. riihimaekiensis: 1 – 2c – 10 – 12 – 3 – 2 d – 9 – 4 – 13 – 14 - 15 – 16 – 17 - 19 Intermediate sequences: 1 – 16 – 15 – 14 – 13 - 4 – 9 – 2 d – 3 – 12 - 10 - 2 c – 17 - 19 Intermediate sequences: 1 – 13 – 14 – 15 – 16 – 4 – 9 – 2 d – 3 – 12 – 10 – 2 c – 17 – 19 C. alchichica sp. n.: 1 – 13 – 14 – 15 – 16 – 2c – 10 – 12 – 3 – 2 d – 9 – 4 – 17 – 19 Arm B (Fig. 4b): With BR near to the telomere. Arm C (Fig. 4c): With a constriction near to the telomere (indicated by a small arrow) and a Nucleolar Organizer (NOR) near to the centromere. However, the Nucleolar Organizer (NOR) is not well seen in all studied cells. Arm D (Fig. 4c): With a NOR near to the centromere but not well expressed in all cells. Arm E (Fig. 4d): similar to C. riihimaekiensis but distinguished by fixed homozygous inversion. C. riihimaekiensis: 1 – 3e – 5 – 10b – 4 – 3f – 10c – 11 – 12- 13 C. alchichica sp. n. : 1 – 3e - 10c – 3f – 4 – 10b – 5 – 11 – 12 – 13 Arm F (Fig. 4d): similar to the band patterns of C. riihimaekiensis C. alchichica sp. n.: 1 – 8c – 12 – 17 – 10 – 8 d – 11 – 18 – 23 Arm G (Fig. 4e): Has one Nucleolar Organizer (NOR) located in one telomere region, and two Balbiani Rings (BRs). The chromosome is partly unconjugated. There is no inherited inversion polymorphism. In material from a depth of 30m, a somatic inversion on arm F was observed in a single individual. The molecular identity of C. alchichica sp. n. (Fig. 5, Table 2). Specimens, localities and sequences analyzed in the present study are listed in Appendix 1 with their corresponding GenBank accession numbers. The matrix used in the phylogenetic analysis includes 58 terminals and 696 aligned characters. Figure 5 shows the maximum likelihood tree obtained using partial sequences of the cox1 gene. Chironomus alchichica sp. n. clusters together with its sister species C. decorus (bootstrap support = 92%). Both species are the sister group of C. bifurcatus (93%), and this evolutionary line is the sister group of C. maturus. BETwEEN SPECIES WIThIN SPECIES C. maturus C. bifurcatus C. decorus C. maturus 0.001 C. bifurcatus 0.116 0.016 C. decorus 0.09 0.069 0.004 C. alchichica sp. n. 0.086 0.067 0.03 0.004 The evolutionary divergence over sequence pairs (uncorrected p-distances) of cox1 between C. alchichica sp. n. and its sister species C. decorus is 3% (Table 2). The uncorrected p-distances between the new species and C. bifurcatus and C. maturus are 6.7% and 8.6% respectively. The average internal distances within each species are low (C. alchichica sp. n. 0.4%; C. decorus 0.4; C. bifurcatus 1.6 and C. maturus 0.1). Habitat and ecological notes. C. alchichica sp. n. inhabits depths from the shallow littoral area down to the deepest portion of the lake (62 m), suggesting a tolerance of a broad range of environmental variables (Table 3). The littoral area where the species was found is sandy and rich in organic matter, and ranged from sediments without vegetation to some that were completely covered with macrophytes (i.e., Zoostera marina and Cyperus laevigatus) and/or benthic algae (filamentous chlorophytes and cyanobacteria, diatoms) (Ramírez-García & Novelo 1984). The deep benthic zone has fine sediments dominated by clayey silts with high organic matter content (algae detritus), while higher aquatic plants are absent in the aphotic depths. The water is clear, with temperatures varying from comparatively warm (18–25°C) in the littoral, to cold (down to 14°C) in the deepest part of the lake. Dissolved oxygen content was also variable ranging from 6.5–9.1 mg L– 1 in the littoral, and from 0.9–5.8 mg L– 1 in the hypolimnion (Alcocer & Bernal-Brooks 2010). TABLE 3. Averages (± standard deviation) and ranges of environmental variables of the littoral and profundal zone of Lake Alchichica, Puebla, where C. alchichica sp. n. is present (T = temperature, K25 = electric conductivity, DO = dissolved oxygen, OM = sediment organic matter, CO3 = sediment carbonates, Text = sediment texture). ZONE T K25 DO PH OM CO3 TExT (°C) (MS CM -1) (MgL -1) (%) (%) (ϕ) LITTORAL 20.7±1.0 12.6±0.6 8.3±1.6 9.0±0.0 5.6±3.6 11.2±1.7 1.4±0.0 18.3–24.9 11.0–13.2 6.5–12.3 8.9–9.0 2.8–8.4 1.9–29 0.2–2.3 PROFUNDAL 14.4±0.0 13.6±0.7 2.5±2.0 9.2±0.1 34.7±3.5 13.4±4.5 5.9±1.2 14.4–14.5 11.9–14.5 0.9–5.8 9.0–9.6 28.9–40.1 6.2–24.5 3.0–9.0 It should be noticed that while C. alchichica sp. n. is present all year around in the littoral zone, it was only present in the depth zone from January (or February) to April (or May), during the circulation to early stratification periods respectively, and during the same period when the bottom water remained oxygenated, as explained by Hernández et al. (2014). In the profundal zone, C. alchichica sp. n. shares its habitat with just one other species, the ostracod Candona patzcuaro (Hernández et al. 2014), while in the littoral zone up to 20 different taxa are present, although the oligochaete Limnodrillus hoffmeisteri and the amphipod Hyalella azteca widely dominate (Alcocer et al. 2016). Chironomus alchichica sp. n. could become the 9th endemic species described for Lake Alchichica, which include the diaptomid copepod Leptodiaptomus garciai (Montiel-Martínez et al. 2008; Osorio-Tafall 1942), the atherinid fish Poblana alchichica (De Buen 1945), the hemipteran Krizousacorixa tolteca (Jansson 1979), the salamander Ambystoma taylorii (Brandon et al. 1981), the isopod Caecidotea williamsi (Escobar-Briones & Alcocer 2002), the diatom Cyclotella alchichicana (Oliva et al. 20 06), the harpacticoid copepod Cletocamptus gomezi (Suárez-Morales et al.. 2013), and the candonid ostracod Candona alchichica (Cohuo et al. 20 17).Published as part of Acosta, Raúl, Prat, Narcís, Ribera, Carles, Michailova, Paraskeva, Hernández-Fonseca, María Del Carmen & Alcocer, Javier, 2017, Chironomus alchichica sp. n. (Diptera: Chironomidae) from Lake Alchichica, Mexico, pp. 53-70 in Zootaxa 4365 (1) on pages 56-63, DOI: 10.11646/zootaxa.4365.1.3, http://zenodo.org/record/111652
The construction of opinion in Javier Marías: rhetorical-argumentative analysis of the columns published by the author between 2009 and 2013
No full textEl presente artículo tiene como objeto de estudio las columnas escritas por Javier Marías, entre los años 2009 y 2013, en el espacio semanal La Zona Fantasma, ubicado en la última página de El País Semanal, suplemento dominical del diario El País. Para el estudio se ha recurrido a un análisis de contenido, a partir de la retórica aristotélica y su posterior renovación por Charles Perelman y Lucie Olbrechts Tyteca, expuesta en su Tratado de la argumentación. La metodología seguida ha permitido identificar las particularidades y características en cuanto a temas, enfoque, estructura y lenguaje que el autor utiliza. Cuantitativamente, se identificaron los temas, los argumentos, el léxico y las figuras literarias de cada columna, y cualitativamente, las temáticas, la construcción del Ethos del autor y la interpretación de los resultados, a la luz del contexto que
enmarca los años en los que se escriben las columnasThis article has as object of study the columns written by Javier Marías between the years 2009 and 2013 in the weekly space “La Zona Fantasma”, located in the last page of El País Semanal, a Sunday supplement in the News Paper El País. For study purposes we have used an analysis of content based on the Aristotelian Rhetoric and its posterior renovation by Charles Perelman and Lucie Olbrechts-Tyteca, exposed in their Treaty of Argumentation. The methodology followed allowed to identify the particularities and characteristics in relation to topics, approach, structure and language the author uses. The qualitative contribution consisted of the conclusions about the data obtained.
This analysis focuses on the reflection around the topics, the construction of the author´s Ethos and the interpretation of the results due to the context that frames eventually, the years the column is writte
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