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Articles de revues sur le sujet « Pisco Basin »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

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1

Bosio, Giulia, Elisa Malinverno, Igor Maria Villa, Claudio Di Celma, Karen Gariboldi, Anna Gioncada, Valentina Barberini, Mario Urbina et Giovanni Bianucci. « Tephrochronology and chronostratigraphy of the Miocene Chilcatay and Pisco formations (East Pisco Basin, Peru) ». Newsletters on Stratigraphy 53, no 2 (25 mars 2020) : 213–47. http://dx.doi.org/10.1127/nos/2019/0525.

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Uhen, Mark D., Nicholas D. Pyenson, Thomas J. Devries, Mario Urbina et Paul R. Renne. « New Middle Eocene Whales from the Pisco Basin of Peru ». Journal of Paleontology 85, no 5 (septembre 2011) : 955–69. http://dx.doi.org/10.1666/10-162.1.

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DeVries, T. J. « Oligocene deposition and Cenozoic sequence boundaries in the Pisco Basin (Peru) ». Journal of South American Earth Sciences 11, no 3 (mai 1998) : 217–31. http://dx.doi.org/10.1016/s0895-9811(98)00014-5.

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Steffen, Damian, Fritz Schlunegger et Frank Preusser. « Drainage basin response to climate change in the Pisco valley, Peru ». Geology 37, no 6 (juin 2009) : 491–94. http://dx.doi.org/10.1130/g25475a.1.

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Belia, Emilia R., et Kevin E. Nick. « Earliest Miocene calcareous nannofossil biostratigraphy from the low-latitude Pisco Basin (Peru) ». Stratigraphy 16, no 2 (juin 2019) : 87–105. http://dx.doi.org/10.29041/strat.16.2.87-105.

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Belia, Emilia R., Kevin E. Nick, Erika Bedoya Agudelo et David K. Watkins. « Earliest Miocene calcareous nannofossil biostratigraphy from the low-latitude Pisco Basin (Peru) ». Stratigraphy 16, no 2 (juin 2019) : 87–105. http://dx.doi.org/10.29041/strat/16.2.87-105.

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Collareta, Alberto, Olivier Lambert, Felix G. Marx, Christian de Muizon, Rafael Varas-Malca, Walter Landini, Giulia Bosio et al. « Vertebrate Palaeoecology of the Pisco Formation (Miocene, Peru) : Glimpses into the Ancient Humboldt Current Ecosystem ». Journal of Marine Science and Engineering 9, no 11 (27 octobre 2021) : 1188. http://dx.doi.org/10.3390/jmse9111188.

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The northward-flowing Humboldt Current hosts perpetually high levels of productivity along the western coast of South America. Here, we aim to elucidate the deep-time history of this globally important ecosystem based on a detailed palaeoecological analysis of the exceptionally preserved middle–upper Miocene vertebrate assemblages of the Pisco Formation of the East Pisco Basin, southern Peru. We summarise observations on hundreds of fossil whales, dolphins, seals, seabirds, turtles, crocodiles, sharks, rays, and bony fishes to reconstruct ecological relationships in the wake of the Middle Miocene Climatic Optimum, and the marked cooling that followed it. The lowermost, middle Miocene Pisco sequence (P0) and its vertebrate assemblage testify to a warm, semi-enclosed, near-shore palaeoenvironment. During the first part of the Tortonian (P1), high productivity within a prominent upwelling system supported a diverse assemblage of mesopredators, at least some of which permanently resided in the Pisco embayment and used it as a nursery or breeding/calving area. Younger portions of the Pisco Formation (P2) reveal a more open setting, with wide-ranging species like rorquals increasingly dominating the vertebrate assemblage, but also local differences reflecting distance from the coast. Like today, these ancient precursors of the modern Humboldt Current Ecosystem were based on sardines, but notably differed from their present-day equivalent in being dominated by extremely large-bodied apex predators like Livyatan melvillei and Carcharocles megalodon.
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Marx, Felix G., et Naoki Kohno. « A new Miocene baleen whale from the Peruvian desert ». Royal Society Open Science 3, no 10 (octobre 2016) : 160542. http://dx.doi.org/10.1098/rsos.160542.

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The Pisco-Ica and Sacaco basins of southern Peru are renowned for their abundance of exceptionally preserved fossil cetaceans, several of which retain traces of soft tissue and occasionally even stomach contents. Previous work has mostly focused on odontocetes, with baleen whales currently being restricted to just three described taxa. Here, we report a new Late Miocene rorqual (family Balaenopteridae), Incakujira anillodefuego gen. et sp. nov., based on two exceptionally preserved specimens from the Pisco Formation exposed at Aguada de Lomas, Sacaco Basin, southern Peru. Incakujira overall closely resembles modern balaenopterids, but stands out for its unusually gracile ascending process of the maxilla, as well as a markedly twisted postglenoid process of the squamosal. The latter likely impeded lateral (omega) rotation of the mandible, in stark contrast with the highly flexible craniomandibular joint of extant lunge-feeding rorquals. Overall, Incakujira expands the still meagre Miocene record of balaenopterids and reveals a previously underappreciated degree of complexity in the evolution of their iconic lunge-feeding strategy.
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Molina, Rubén Rojas, Gerardo Maghella Seminario, José Maguiña León et Mirella Tejerina Caisan. « Contribution of Isotopic Techniques in the Hydrological Study of the Aquifers of Ica, Villacuri and Lanchas ». Environmental Management and Sustainable Development 9, no 2 (3 mai 2020) : 72. http://dx.doi.org/10.5296/emsd.v9i2.16954.

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Ica Aquifer located at the coastal zone of Ica River Valley, supplies 40% of the water to a number of farms of Ica Region which is one of the most productive valley of Peru that covers an area of 30,000 hectares of area, in which a diverse agricultural product are grown for local and external market. In the last 15 years, water-table of the aquifer was lowering at an elevated rate that concerned to farmers and authorities of the Peruvian Government, so a number of studies was carried out to increase the water supply to the agriculture areas.The main purpose of the study using isotope techniques, was to have a first insight of the hydrodynamics of Ica, Villacuri and Lanchas Aquifers and the possible interconnection between them and with Pisco River. For such purpose, 31 wells, lakes, rivers and springs of Ica and Pisco Basin where sampled during the years 2014 to 2016 both in rain and dry seasons, getting 189 samples for isotope and chemical analysis. The sampling schedule didn’t include rain sampling, instead of it, selected springs were sampled and nearby basin rain data was used.18O,2H and 13C stable isotopes and 3H, 14C radioactive isotopes of the water samples were analyzed in the laboratory of “Isotope Tracer Technologies INC”; the results of the stable isotope analysis confirm the hydraulic interconnection of the three aquifers mentioned above; it also was confirmed that the main source of recharge was provided by Ica River and evidences were found about the contribution of Pisco River in the recharge of Villacuri and Lanchas Aquifers.Analysis of 14C reveals that some wells are overexploited. All the results of 3H analysis were out of range, so it was not useful for the conclusions of the study, and a new sampling of water is required; the reason of this out of range result should be the possible contamination of the samples with no environmental Tritium.
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DeVries, Thomas J. « Early Paleogene brackish-water molluscs from the Caballas Formation of the East Pisco Basin (Southern Peru) ». Journal of Natural History 53, no 25-26 (17 décembre 2018) : 1533–84. http://dx.doi.org/10.1080/00222933.2018.1524032.

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Collareta, Alberto, Rafael Varas-Malca, Giulia Bosio, Mario Urbina et Giovanni Coletti. « Ghosts of the Holobiont : Borings on a Miocene Turtle Carapace from the Pisco Formation (Peru) as Witnesses of Ancient Symbiosis ». Journal of Marine Science and Engineering 11, no 1 (29 décembre 2022) : 45. http://dx.doi.org/10.3390/jmse11010045.

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In spite of the widespread occurrence of epibiotic turtle barnacles (Coronuloidea: Chelonibiidae and Platylepadidae) on extant marine turtles (Chelonioidea: Cheloniidae and Dermochelyidae), and although the association between these cirripedes and their chelonian hosts has existed for more than 30 million years, only a few studies have investigated the deep past of this iconic symbiotic relationship on palaeontological grounds. We describe probable platylepadid attachment scars in the form of hemispherical/hemiellipsoidal borings on an Upper Miocene (Tortonian) fragmentary turtle carapace, identified herein as belonging to Cheloniidae, from the Pisco Lagerstätte (East Pisco Basin, southern Peru). When coupled with the available molecular data, this and other similar ichnofossils allow for hypothesising that platylepadid symbionts were hosted by sea turtles as early as in early Oligocene times and became relatively widespread during the subsequent Miocene epoch. Chelonian fossils that preserve evidence of colonisation by platylepadid epibionts in the form of pits on the turtle shell should be regarded as fossil holobionts, i.e., palaeontological witnesses of discrete communal ecological units formed by a basibiont and the associated symbionts (including the epibiota). A greater attention to the bone modifications that may be detected on fossil turtle bones is expected to contribute significantly to the emerging field of palaeosymbiology.
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Bosio, Giulia, Elisa Malinverno, Alberto Collareta, Claudio Di Celma, Anna Gioncada, Mariano Parente, Fabrizio Berra et al. « Strontium Isotope Stratigraphy and the thermophilic fossil fauna from the middle Miocene of the East Pisco Basin (Peru) ». Journal of South American Earth Sciences 97 (janvier 2020) : 102399. http://dx.doi.org/10.1016/j.jsames.2019.102399.

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Di Celma, C., E. Malinverno, A. Collareta, G. Bosio, K. Gariboldi, O. Lambert, W. Landini et al. « Facies analysis, stratigraphy and marine vertebrate assemblage of the lower Miocene Chilcatay Formation at Ullujaya (Pisco basin, Peru) ». Journal of Maps 14, no 2 (10 avril 2018) : 257–68. http://dx.doi.org/10.1080/17445647.2018.1456490.

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Di Celma, C., P. P. Pierantoni, E. Malinverno, A. Collareta, O. Lambert, W. Landini, G. Bosio et al. « Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru ». Journal of Maps 15, no 2 (5 mai 2019) : 393–405. http://dx.doi.org/10.1080/17445647.2019.1604439.

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Rustichelli, Andrea, Claudio Di Celma, Emanuele Tondi et Giovanni Bianucci. « Deformation within the Pisco Basin sedimentary record (southern Peru) : Stratabound orthogonal vein sets and their impact on fault development ». Journal of South American Earth Sciences 65 (janvier 2016) : 79–100. http://dx.doi.org/10.1016/j.jsames.2015.11.002.

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Lambert, Olivier, Christian de Muizon, Mario Urbina et Giovanni Bianucci. « A new longirostrine sperm whale (Cetacea, Physeteroidea) from the lower Miocene of the Pisco Basin (southern coast of Peru) ». Journal of Systematic Palaeontology 18, no 20 (21 septembre 2020) : 1707–42. http://dx.doi.org/10.1080/14772019.2020.1805520.

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Bianucci, Giovanni, Alberto Collareta, Giulia Bosio, Walter Landini, Karen Gariboldi, Anna Gioncada, Olivier Lambert et al. « Taphonomy and palaeoecology of the lower Miocene marine vertebrate assemblage of Ullujaya (Chilcatay Formation, East Pisco Basin, southern Peru) ». Palaeogeography, Palaeoclimatology, Palaeoecology 511 (décembre 2018) : 256–79. http://dx.doi.org/10.1016/j.palaeo.2018.08.013.

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Coletti, Giovanni, Giulia Bosio, Alberto Collareta, Elisa Malinverno, Valentina Alice Bracchi, Claudio Di Celma, Daniela Basso et al. « Biostratigraphic, evolutionary, and paleoenvironmental significance of the southernmost lepidocyclinids of the Pacific coast of South America (East Pisco Basin, southern Peru) ». Journal of South American Earth Sciences 96 (décembre 2019) : 102372. http://dx.doi.org/10.1016/j.jsames.2019.102372.

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Gariboldi, Karen, Anna Gioncada, Giulia Bosio, Elisa Malinverno, Claudio Di Celma, Chiara Tinelli, Gino Cantalamessa, Walter Landini, Mario Urbina et Giovanni Bianucci. « The dolomite nodules enclosing fossil marine vertebrates in the East Pisco Basin, Peru : Field and petrographic insights into the Lagerstätte formation ». Palaeogeography, Palaeoclimatology, Palaeoecology 438 (novembre 2015) : 81–95. http://dx.doi.org/10.1016/j.palaeo.2015.07.047.

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Rustichelli, Andrea, Claudio Di Celma, Emanuele Tondi, Patrick Baud et Sergio Vinciguerra. « Fibrous gypsum veins as diffuse features and within fault zones : the case study of the Pisco Basin (Ica desert, southern Peru) ». Journal of the Geological Society 173, no 3 (5 février 2016) : 405–18. http://dx.doi.org/10.1144/jgs2015-084.

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Malinverno, Elisa, Giulia Bosio, Claudio Di Celma, Karen Gariboldi, Anna Gioncada, Pietro Paolo Pierantoni, Alberto Collareta et al. « (Bio)stratigraphic overview and paleoclimatic-paleoceanographic implications of the middle-upper Eocene deposits from the Ica River Valley (East Pisco Basin, Peru) ». Palaeogeography, Palaeoclimatology, Palaeoecology 578 (septembre 2021) : 110567. http://dx.doi.org/10.1016/j.palaeo.2021.110567.

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Cadena, Edwin, Juan Abella et Maria Gregori. « The first Oligocene sea turtle (Pan-Cheloniidae) record of South America ». PeerJ 6 (23 mars 2018) : e4554. http://dx.doi.org/10.7717/peerj.4554.

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The evolution and occurrence of fossil sea turtles at the Pacific margin of South America is poorly known and restricted to Neogene (Miocene/Pliocene) findings from the Pisco Formation, Peru. Here we report and describe the first record of Oligocene (late Oligocene, ∼24 Ma) Pan-Cheloniidae sea turtle remains of South America. The fossil material corresponds to a single, isolated and well-preserved costal bone found at the Montañita/Olón locality, Santa Elena Province, Ecuador. Comparisons with other Oligocene and extant representatives allow us to confirm that belongs to a sea turtle characterized by: lack of lateral ossification, allowing the dorsal exposure of the distal end of ribs; dorsal surface of bone sculptured, changing from dense vermiculation at the vertebral scute region to anastomosing pattern of grooves at the most lateral portion of the costal. This fossil finding shows the high potential that the Ecuadorian Oligocene outcrops have in order to explore the evolution and paleobiogeography distribution of sea turtles by the time that the Pacific and the Atlantic oceans were connected via the Panama basin.
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Collareta, Alberto, René Kindlimann, Alessio Baglioni, Walter Landini, Giovanni Sarti, Alí Altamirano, Mario Urbina et Giovanni Bianucci. « Dental Morphology, Palaeoecology and Palaeobiogeographic Significance of a New Species of Requiem Shark (Genus Carcharhinus) from the Lower Miocene of Peru (East Pisco Basin, Chilcatay Formation) ». Journal of Marine Science and Engineering 10, no 10 (10 octobre 2022) : 1466. http://dx.doi.org/10.3390/jmse10101466.

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Nowadays, the requiem sharks comprise one of the most diverse and widespread families of selachians, i.e., Carcharhinidae. Among the carcharhinids, the genus Carcharhinus has the largest number of living species, namely, at least 35. Known from fossils as old as the Cretaceous, the requiem sharks did not significantly radiate before the Eocene (when Carcharhinus also appeared), and their diversification mainly occurred in Neogene times. Here, we describe a new species of requiem shark, Carcharhinus dicelmai sp. nov., based on fossil teeth from Lower Miocene (18.4–18.1 Ma) strata of the Chilcatay Formation of the East Pisco Basin (southern Peru). Upper teeth of C. dicelmai sp. nov. are typically provided with a slender, smooth-edged cusp; a marked coronal twist; and a distal heel that bears 1–5 coarse, angularly lobate serrae that become more prominent toward the base of the cusp. The dentition of C. dicelmai sp. nov. appears less akin to that of most other carcharhines to the cutting-clutching type, and seemingly testifies to the development of more predominantly clutching adaptations. A carcharhinid tooth from the Burdigalian to lower Langhian Cantaure Formation of Venezuela is reassigned to C. dicelmai sp. nov., suggesting a trans-Panamanian distribution for this extinct shark species.
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DeVries, Thomas J., John A. Barron, Mario Urbina-Schmitt, Diana Ochoa, Raúl Esperante et Lawrence W. Snee. « The Miocene stratigraphy of the Laberinto area (Río Ica Valley) and its bearing on the geological history of the East Pisco Basin (south-central Peru) ». Journal of South American Earth Sciences 111 (novembre 2021) : 103458. http://dx.doi.org/10.1016/j.jsames.2021.103458.

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Coletti, Giovanni, Alberto Collareta, Giulia Bosio, Mario Urbina-Schmitt et John Buckeridge. « Perumegabalanus calziai gen. et sp. nov., a new intertidal megabalanine barnacle from the early Miocene of Peru ». Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 294, no 2 (1 novembre 2019) : 197–212. http://dx.doi.org/10.1127/njgpa/2019/0856.

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Living members of the tribe Austromegabalanini are large balanid barnacles (Crustacea: Cirripedia: Neobalanoformes) that live in temperate and cold waters of the Southern Hemisphere. During the Neogene, however, the austromegabalanines also inhabited the Northern Hemisphere, as well as some low- latitude tropical environments. This paper describes a new taxon of austromegab-alanines, Perumegabalanus calziai gen. et sp. nov., from the shallow-marine, nearshore, lower Miocene (19 to 17 Ma, Burdigalian) deposits of the Chilcatay Formation (East Pisco Basin, southern Peru). Among austromegabalanines, this new taxon is characterised by the presence of thick, ornamented, multitubiferous parietes, where the parietal tubes are irregularly partitioned by auxiliary sep - ta; in addition, the sheath is vesicular. Based on morphofunctional considerations, the peculiar shell architecture of P. calziai is here interpreted as well-suited for an existence in the intertidal zone. In the Chilcatay strata, two taxa of Austromegabalanini (i. e., Austromegabalanus carrioli and P. calziai) coexist, representing some of the geologically oldest records of austromegabalanines worldwide – an observation that strongly supports the hypothesis of a circum-equatorial origin and early diversification for this successful lineage of acorn barnacles.
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Bianucci, Giovanni, Claudio Di Celma, Alberto Collareta, Walter Landini, Klaas Post, Chiara Tinelli, Christian de Muizon et al. « Fossil marine vertebrates of Cerro Los Quesos : Distribution of cetaceans, seals, crocodiles, seabirds, sharks, and bony fish in a late Miocene locality of the Pisco Basin, Peru ». Journal of Maps 12, no 5 (10 janvier 2016) : 1037–46. http://dx.doi.org/10.1080/17445647.2015.1115785.

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Moya-Álvarez, Aldo S., Daniel Martínez-Castro, José L. Flores et Yamina Silva. « Sensitivity Study on the Influence of Parameterization Schemes in WRF_ARW Model on Short- and Medium-Range Precipitation Forecasts in the Central Andes of Peru ». Advances in Meteorology 2018 (2018) : 1–16. http://dx.doi.org/10.1155/2018/1381092.

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A sensitivity study of the performance of the Weather Research and Forecasting regional model (WRF, version 3.7) to the use of different microphysics, cumulus, and boundary layer parameterizations for short- and medium-term precipitation forecast is conducted in the Central Andes of Peru. Lin-Purdué, Thompson, and Morrison microphysics schemes were tested, as well as the Grell–Freitas, Grell 3d, and Betts–Miller–Janjic cumulus parameterizations. The tested boundary layer schemes were the Yonsei University and Mellor–Yamada–Janjic. A control configuration was defined, using the Thompson, Grell–Freitas, and Yonsei University schemes, and a set of numerical experiments is made, using different combinations of parameterizations. Data from 19 local meteorological stations and regional and global gridded were used for verification. It was concluded that all the configurations overestimate precipitation, but the one using the Morrison microphysical scheme had the best performance, based on the indicators of bias (B) and root mean square error (RMSE). It is recommended not to use the Betts–Miller–Janjic scheme in this region for low resolution domains. Categorical forecast verification of the occurrence of rainfall as a binary variable showed detection rates higher than 85%. According to this criterion, the best performing configuration was the combination of Betts–Miller–Janjic and Morrison. Spatial verification showed that, even if all the configurations overestimated precipitation in some degree, spatial patterns of rainfall match the TRMM and PISCO rainfall data. Morrison’s microphysics scheme shows the best results, and consequently, this configuration is recommended for short- and medium-term rainfall forecasting tasks in the Central Andes of Peru and particularly in the Mantaro basin. The results of a special sensitivity experiment showed that the activation or not of cumulus parametrization for the domain of 3 km resolution is not relevant for the precipitation forecast in the study region.
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Filippelli, G. M., M. L. Delaney, R. E. Garrison, S. K. Omarzai et R. J. Behl. « Phosphorus accumulation rates in a Miocene low oxygen basin : The Monterey Formation (Pismo Basin), California ». Marine Geology 116, no 3-4 (février 1994) : 419–30. http://dx.doi.org/10.1016/0025-3227(94)90055-8.

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Liddicoat, Joseph C. « Palaeomagnetism of the Pico Formation, Santa Paula Creek, Ventura Basin, California ». Geophysical Journal International 110, no 2 (août 1992) : 267–75. http://dx.doi.org/10.1111/j.1365-246x.1992.tb00872.x.

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Kondraciuk, Konrad. « Another view on handwriting samples : „inverted repeatability” ». Issues of Forensic Science 307 (2020) : 37–50. http://dx.doi.org/10.34836/pk.2020.307.1.

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The article takes up the issue of a different approach to materials being subject to classical document examination and refers to repeatable forms, which have an important function in handwriting analysis. Basing on examinations of writing samples originating from different individuals, an occurrence of a repeatable form departing from the official definition has been observed, i.e. “inverted repeatability”. It constitutes a variation of the traditional repeatable form, i.e. the compared elements are inverted and executed in opposite directions. Below, examples and results of the research work are presented. The very nature of the “inverted repeatability” in classical document examination is emphasized with reference to writing habits and traditional repeatable forms.
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Nieves-Vilchez, Ines Aberlí, Hiram Joshua Castillo-Infante, Josué Isac Carillo-Espinoza et Noé Benjamín Pampa-Quispe. « Estudio hidrológico de una cuenca para la evaluación del potencial de una pico central hidroeléctrica en una zona rural ». Tecnología y ciencias del agua 13, no 1 (1 janvier 2022) : 292–332. http://dx.doi.org/10.24850/j-tyca-2022-01-07.

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Rudolph, Kurt W., Wolfgang Schlager et Kevin T. Biddle. « Seismic models of a carbonate foreslope-to-basin transition, Picco di Vallandro, Dolomite Alps, northern Italy ». Geology 17, no 5 (1989) : 453. http://dx.doi.org/10.1130/0091-7613(1989)017<0453:smoacf>2.3.co;2.

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Schouten, Stefan, Martin Schoell, W. Irene C. Rijpstra, Jaap S. Sinninghe Damsté et Jan W. de Leeuw. « A molecular stable carbon isotope study of organic matter in immature Miocene Monterey sediments, Pismo basin ». Geochimica et Cosmochimica Acta 61, no 10 (mai 1997) : 2065–82. http://dx.doi.org/10.1016/s0016-7037(97)00062-8.

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Langhals, Heinz, et Sigrid Saulich. « Chromophores as Elements of Structure for Pico Technology Optical Computers ». Zeitschrift für Naturforschung B 58, no 7 (1 juillet 2003) : 695–97. http://dx.doi.org/10.1515/znb-2003-0715.

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The transfer of the energy of optical excitation between the different chromophores of anthraquinone and perylene dyes has been controlled by their relative orientation. Such assemblies are basic components for optical computers on the picometer scale.
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Zakariz, Naufal Praska, et Anggara Trisna Nugraha. « The Effect of Inlet Notch Variations on Turbine Speed in Pico-hydro Power Plants ». Journal of Electronics, Electromedical Engineering, and Medical Informatics 4, no 1 (16 janvier 2022) : 35–41. http://dx.doi.org/10.35882/jeeemi.v4i1.4.

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Energy is an important element in the continuity of human activities. Indonesia has the potential to produce 94.3GigaWatt of electricity in the hydropower sector, but only a few can be utilized, which is only 4.2GigaWatt [1]. This study aims to utilize renewable energy that has not been utilized optimally, especially in Indonesia. This study exploits the potential of water flow from the Coban Wonoasri River, Bangun Village, Munjungan District, Trenggalek Regency which has a low head but has a fairly heavy discharge. The basin cone for making vortex flow has a canal length of 1450mm, a canal width of 231.5mm, and a canal height of 500mm with a basin cone diameter of 560mm, a basin cone height of 700mm, and a water outlet diameter of 90mm. A vortex turbine with a diameter of 270mm and a height of 210mm with a total of 8 blades, a blade curvature of 30°, and a blade tilt of 22.5° was used for research on this low head river. The inlet notch variations that will be used are angles of 0°, 17.82°, 19.30°, and 19.98°. The inlet notch with a width of 0° and a discharge of 8.81l/s cannot produce turbine rotation because the vortex flow is not formed properly. Inlet notch with a width of 17.82° and 19.30° produces an average turbine speed of 157.2 rpm and 159.2 rpm. The variation of the inlet notch with a width of 19.98° produces the best turbine speed of 162.7 rpm with a flowrate of 7.72l/s.
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Trinidad Hernández, Oswaldo, Katrin Sieron et Francisco Córdoba Montiel. « Susceptibilidad a erosión hídrica y procesos gravitacionales en la subcuenca de alta montaña del río Jamapa, Veracruz, México ». UVserva, no 8 (25 octobre 2019) : 16–28. http://dx.doi.org/10.25009/uvs.v0i8.2632.

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En el presente trabajo se determinó la susceptibilidad actual a procesos de erosión hídrica y procesos gravitacionales en la subcuenca de alta montaña del río Jamapa en el flanco Norte del volcán Citlaltépetl o Pico de Orizaba. El estudio se llevó a cabo mediante el empleo de Sistemas de Información Geográfica (SIG), con la aplicación los modelos USLE y Mora-Vahrson. Los resultados mostraron una concordancia de ambos modelos de acuerdo con la distribución de los mayores grados de susceptibilidad. Contrario a lo que se esperaba, los modelos arrojaron mayores susceptibilidades tanto de erosión hídrica como a procesos gravitacionales en la parte baja y media de la subcuenca, lo cual se debe a que los principales activadores hídricos se presentan con mayores índices en las partes bajas y disminuyen con la altitud.Palabras clave: Erosión hídrica; remoción en masa; susceptibilidad; Citlaltépetl (Pico de Orizaba); Sistemas de Información GeográficaAbstractIn the present work, the current susceptibility to water erosion- and gravitational processes in the high mountain sub-basin of the Jamapa River on the North flank of the Citlaltépetl or Pico de Orizaba volcano was determined. The study was carried out through the employment of Geographic Information Systems (GIS), with the application of the ERU and Mora-Vahrson models. The results show a concordance of both models according to the distribution of the highest degrees of susceptibility. Contrary to what was expected, the models show a greater susceptibility to both water erosion and gravitational processes in the lower and middle part of the sub-basin, which is due to the fact that the main water activators are presented with higher rates in the lower parts and decrease with altitude.Keywords: Water Erosion; Mass Removal; Susceptibility; Citlaltépetl (Pico de Orizaba); Geographic Information Systems.
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Carrick, Hunter J., Emon Butts, Daniella Daniels, Melanie Fehringer, Christopher Frazier, Gary L. Fahnenstiel, Steven Pothoven et Henry A. Vanderploeg. « Variation in the abundance of pico, nano, and microplankton in Lake Michigan : Historic and basin-wide comparisons ». Journal of Great Lakes Research 41 (2015) : 66–74. http://dx.doi.org/10.1016/j.jglr.2015.09.009.

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Sammartino, M., A. Di Cicco, S. Marullo et R. Santoleri. « Spatio-temporal variability of micro-, nano- and pico-phytoplankton in the Mediterranean Sea from satellite ocean colour data of SeaWiFS ». Ocean Science Discussions 12, no 1 (9 février 2015) : 161–201. http://dx.doi.org/10.5194/osd-12-161-2015.

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Abstract. The seasonal and year-to-year variability of the spatial distribution of the Phytoplankton Size Classes (PSCs) has been examined in the Mediterranean Sea using the entire time series of Sea-viewing Wide Field-of-view Sensor (SeaWiFS) space observations (1998 to 2010). PSCs daily maps have been determined using an empirical model based on a synoptic relationship between surface chlorophyll a and diagnostic pigments referred to different taxonomic groups. The validation of model PSCs estimates using a Mediterranean HPLC pigments dataset revealed that the model is able to correctly detect the contribution of pico-, nano- and micro-phytoplankton to TChl a. The analysis of micro-, nano- and pico-phytoplankton satellite time series (1998–2010) describes quantitatively the seasonal and inter-annual variability of the spatial distribution of the algal assemblage structure over the basin. The analysis reveals that in most of the Mediterranean Sea the main contribution to the chlorophyll a all around the year comes from the pico-phytoplankton component, above all in poor nutrient conditions. Regions with different and peculiar features are the northwestern Mediterranean Sea, the Alborán Sea and several coastal areas, such as the north Adriatic Sea. In these areas, local interactions between physical and biological components modulate the competition between the three phytoplankton size classes. It results that, during the spring bloom season, micro-phytoplankton dominates in areas of intense vertical winter mixing and deep/intermediate water formation; while, in coastal areas, micro-phytoplankton dominates in all seasons, thanks to the nutrients supply that comes from the terrestrial inputs. In the Alborán Sea, in which the Atlantic inflow modulates the nutrient availability, any predominance of one class over the other two has been observed. Nano-phytoplankton component instead remains widespread over the entire basin along the year, and its contribution to the TChl a is of the order of 30–50%. The inter-annual variability is observed in the whole basin, but the largest inter-annual signal occurs in the northwestern Mediterranean Sea, driven by the year-to-year variation in intensity and extension of the spring bloom. In absence of sufficient in situ data of community composition, the satellite-based analysis demonstrated that pico, nano and micro classes often coexist. The predominance of one group over the other ones is strongly dependent on the physical-biological processes occurring at mesoscale. These processes directly influence the nutrient and light availability, which are the principal forcing for the algae growth.
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Fukushima, Michio, Noriko Tomioka, Tuantong Jutagate, Mikiya Hiroki, Tomoyoshi Murata, Chatchai Preecha, Piyathap Avakul, Pisit Phomikong et Akio Imai. « The dynamics of pico-sized and bloom-forming cyanobacteria in large water bodies in the Mekong River Basin ». PLOS ONE 12, no 12 (22 décembre 2017) : e0189609. http://dx.doi.org/10.1371/journal.pone.0189609.

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P., Dr Karrupusamy. « Performance Analysis of Multiple Pico Hydro Power Generation ». Journal of Electrical Engineering and Automation 2, no 2 (29 mai 2020) : 92–101. http://dx.doi.org/10.36548/jeea.2020.2.005.

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Electric energy has become a basic and essential thing in human life. The electricity is not only utilized for entertainment, it also helpful in powering many devices utilized in medicine, emergency and assisting. Generation of electric power is not a simple task in any medium. There are several medium of power generation is possible in the present scenario. At present, renewable source of energy generation has become popular because of its atmosphere friendly nature and reduced cost of installation for generating station. Hydro power generation is one among such method of power generation produces electricity by means of rotating a turbine blades with running water. The traditional hydro power plants were made to produce electric energy from the river water movement and falls water movement. The proposed MPH (Multiple Pico Hydro) power generation scheme is developed to make power generation from the domestic running water flowing in the pipeline of a home or apartment. The produced power is stored to a battery source and inverted in to an alternating current supply for powering the home. To make an efficient model the pico power generators are fixed to multiple pipelines. The performance of the proposed model is analyzed and it can be connected to another renewable energy sources for making a hybrid structure of power generation.
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Irwansyah, Ridho, Warjito, Budiarso, Christopher Clement Rusli et Sanjaya BS Nasution. « Analysing Hydraulic Efficiency of Water Vortex Pico-Hydro Turbine using Numerical Method ». Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 77, no 2 (14 novembre 2020) : 91–101. http://dx.doi.org/10.37934/arfmts.77.2.91101.

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To overcome the lack of rural electricity in Indonesia vortex pico-hydro turbines are used as an option solution. This is due to the ability of the vortex turbine to work in low head conditions effectively. This study is conducted with comparison of curved and straight blade to obtain a more optimum turbine performance. Two methods are carried out in this study, analytical and computational method. Analytical methods are used to determine blade geometry and its performance while computational methods are used to analyse internal flow of turbine. As a result, the study concludes that hydraulic efficiency of vortex turbine in this study doesn’t affect much between straight and curved blades. The hydraulic efficiency for those blades is around 0.63. In addition, the study continued by analysing the optimum location of the blade in the basin. The results of the study show that the optimum ratio of depth and diameter of the blade is 0.33 with turbine efficiency is 0.84. Thus, the location of the blades is more important than the type of blades.
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Peloso, Vincent C. « Transformación de la sociedad campesina, articulación y subdesarrollo en las haciendas algodoneras peruanas : el valle de Pisco, 1883-1925 ». Allpanchis 15, no 21 (1 octobre 2020) : 193–223. http://dx.doi.org/10.36901/allpanchis.v15i21.890.

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Dos de las hipótesis más difundidas que explican cómo se plasmó el subdesarrollo capitalista en el Perú del siglo XX se basan en el análisis de clases. Una de ellas subraya el papel condescendiente de la clase gobernante, en especial el sector terrateniente, al someter la economía a un predominio de la agricultura de exportación y la minería, obstaculizando así que las relaciones sociales se transformasen para dar paso a un proletariado así que las relaciones sociales se transformasen para dar paso a un proletariado independiente y con conciencia de clase. La otra hipótesis destaca la respuesta de las masas rurales a la política agroexportadora de la clase gobernante, y señala que según fueron éstas contestando al orden hegemónico de los terratenientes, las haciendas y plantaciones se tornaron en instituciones críticas a través de las cuales surgieron y luego fueron obstruidas las oportunidades para una transformación de la sociedad rural. Estas ideas han estimulado la investigación sobre hacendados y campesinos, examinando los ejes en torno a los cuales se desplazaban sus relaciones en las primeras etapas de modernización de las economías rurales.
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Wei, W. L., B. Lv, Y. L. Liu et X. F. Yang. « Numerical Simulation of Flow on Stepped Spillway Combined with Wide Tailing Piers and Stilling Basin ». Applied Mechanics and Materials 170-173 (mai 2012) : 2047–50. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.2047.

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In this paper, a two-phase flow model combined with the Realizable k–ε turbulence model was used to simulate hydraulic characteristics of two-type dissipaters: the stepped spillway combined with stilling pool and the stepped spillway combined with wide tailing pier and stilling pool. The distributions of physical parameters, such as velocity field, pressure field, turbulence kinetic energy and turbulence dissipation rate were obtained. The grid was generated by using the regional division method, the unstructured grids used for the irregular and complex parts and the structured grids for the regular and simple parts, and the grid density is arranged according to the flow gradient size. The finite volume method was adopted to discretized the control equations; and the VOF method was adopted to deal with the free water surface; and the PISO algorithm was used to solve the velocity and pressure coupling equations. A comparative analysis of the two energy-dissipators in the velocity field, pressure field, turbulence kinetic energy and turbulence kinetic energy dissipation rate shows that the dissipation of overflow for a stepped spillway together with wide tailing piers and a stilling pool jointing energy dissipator is better than that with pier situation.
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Neto, Antonio Gomes da Costa. « O PISO NACIONAL DOS TRABALHADORES DA EDUCAÇÃO ESCOLAR BÁSICA / THE NATIONAL SALARY FOR BASIC SCHOOL EDUCATION WORKES ». Brazilian Journal of Development 7, no 1 (2021) : 11284–93. http://dx.doi.org/10.34117/bjdv7n1-771.

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Rotzien, J. R., D. R. Lowe et J. R. Schwalbach. « Processes of Sedimentation and Stratigraphic Architecture of Deep-Water Braided Lobe Complexes : The Pliocene Repetto and Pico Formations, Ventura Basin, U.S.A ». Journal of Sedimentary Research 84, no 10 (14 octobre 2014) : 910–34. http://dx.doi.org/10.2110/jsr.2014.71.

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Caputo Neto, V., A. Ribeiro, F. O. Nepomuceno, I. A. Dussin et R. A. J. Trouw. « The Pico do Itapeva Formation : A record of gravitational flow deposits in an Ediacaran intracontinental basin, southern Brasília Orogen, SE Brazil ». Journal of South American Earth Sciences 84 (juillet 2018) : 34–47. http://dx.doi.org/10.1016/j.jsames.2018.03.006.

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Łubocki, Jakub Maciej. « Pismo jako obiekt muzealny (na przykładzie zbiorów Działu Sztuki Wydawniczej Muzeum Narodowego we Wrocławiu) ». Z Badań nad Książką i Księgozbiorami Historycznymi 16, no 2 (29 juillet 2022) : 215–37. http://dx.doi.org/10.33077/uw.25448730.zbkh.2022.695.

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Writing systems and typefaces embodimented in any form (letter sketches, designs of typefaces, resources of sorts and matrices, prints and manuscripts, printing specimens, type foundries catalogues, typefaces specimens) are objects worth to become museum objects. Based on these, the museum will generate knowledge about script and lettering through: giving insight into conceptual work on designs of typefaces, acknowledging about history of development writing systems and typefaces, storaging of materials for the future correct digitization of the typeface, saving typefaces and writing systems from total annihilation. Hence: the catalogue of basic types of artefacts relevant to process of embodiment the script was present; the benefits that can result from the deliberate and conscious collecting of this type of artefacts as museum objects was outlined; the importance of the museum collection in research on script, typefaces and writing systems and its preservation as an element of heritage was indicated.
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Zheng, Wendi, Wen Zhou, Wenxi Cao, Yupeng Liu, Guifen Wang, Lin Deng, Cai Li, Yu Zhang et Kai Zeng. « Vertical Variability of Total and Size-Partitioned Phytoplankton Carbon in the South China Sea ». Remote Sensing 13, no 5 (5 mars 2021) : 993. http://dx.doi.org/10.3390/rs13050993.

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The standing stock of phytoplankton carbon is a basic and essential property for understanding oceanic ecosystems, biogeochemical cycles, and regional climates. However, current related algorithms mainly focus on remote-sensed application, which cannot describe the vertical profile of phytoplankton carbon throughout the whole euphotic zone. In this study, we modified a previous absorption-based bio-optical algorithm to acquire vertical variabilities of the total and size-partitioned phytoplankton carbon based on field data from the South China Sea (SCS). The mean absolute errors and the biases between estimated and field picophytoplankton carbon were <2.14 and 0.6–2.0, respectively. The results showed that the vertical profile of total phytoplankton carbon displayed a Gaussian distribution in the stratified SCS basin. The picophytoplankton carbon was always the fundamental component of the total phytoplankton carbon within the whole euphotic zone. The dominant picophytoplankton species changed from Synechococcus-like cyanobacteria at the sea surface to pico-sized haptophytes at the phytoplankton carbon maximum layer. The strong covariation between total phytoplankton carbon and chlorophyll-a concentration suggested that they can be converted into each other through an accurate carbon-to-chlorophyll ratio in the open SCS. These results provide essential information that can be used to decipher the three-dimensional structure of total and size-partitioned phytoplankton carbon in the open SCS.
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Celic, Zeljka. « UKRAINIAN WRITERS AND LITERARY WORKS AS A COMMUNICATIONAL DIMENSION FACTOR OF UKRAINIAN LANGUAGE IN CROATIAN CONTEXT – TRANSLITERATION AND ADAPTATION ». Naukovì zapiski Nacìonalʹnogo unìversitetu «Ostrozʹka akademìâ». Serìâ «Fìlologìâ» 1, no 9(77) (30 janvier 2020) : 321–25. http://dx.doi.org/10.25264/2519-2558-2020-9(77)-321-325.

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Communicational dimension of particular language, that is not native or L1 language, is conditioned geographically and by sociohistorical factors, such as shared state and state language. Communicational dimension of Ukrainian language in Croatian context is variable, in most cases the knowledge of Ukrainian realia or simply acquaintance with the basic information is on a zero level, especially beyond the academic circle. Though Ukrainian and Croatian language belong to common language family, there was no any geographical connection between them after the settlement of Slavs in the Early Middle Ages. There was no physical contact, only the political one: the West part of modern Ukraine (Galicia region) was a part of a common Austro-Hungarian Empire including regions of Croatia and Slavonia. Ukrainian Galicia is a shared historical component for Ukrainian and Croatian context in the Great War. Communicational dimension of Ukrainian language in Croatian context is channeled by Russian language and Russian literature. Communicational dimension of Ukrainian language raises from a zero level in the last decade of the 21st century. We shall ignore amplitudes on a zero level connected with temporarily football championships, which throw a short-term light on Ukrainian trivia. The first decade shows the intention to upgrade the level of communicational dimension related to Ukrainian language with a help of Ukrainian contemporary literary works translations. Proper names of Ukrainian authors with their works potentially should widen communicational dimension of Ukrainian language in a Croatian context, at least in the culturological context. However, the result is an opposite one.
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Sammartino, M., A. Di Cicco, S. Marullo et R. Santoleri. « Spatio-temporal variability of micro-, nano- and pico-phytoplankton in the Mediterranean Sea from satellite ocean colour data of SeaWiFS ». Ocean Science 11, no 5 (25 septembre 2015) : 759–78. http://dx.doi.org/10.5194/os-11-759-2015.

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Abstract. The seasonal and year-to-year variability of the phytoplankton size class (PSC) spatial distribution has been examined in the Mediterranean Sea by using the entire time series of Sea-viewing Wide Field-of-view Sensor (SeaWiFS) space observations (1998–2010). Daily maps of PSCs have been determined using an empirical model based on a synoptic relationship between surface chlorophyll a and diagnostic pigments referred to different taxonomic groups. The analysis of micro-, nano- and pico-phytoplankton satellite time series (1998–2010) describes, quantitatively, the algal assemblage structure over the basin and reveals that the main contribution to chlorophyll a in most of the Mediterranean Sea comes from the pico-phytoplankton component, especially in nutrient-poor environments. Regions with different and peculiar features are the Northwestern Mediterranean Sea, the Alborán Sea and several coastal areas, such as the North Adriatic Sea. In these areas, local interactions between physical and biological components modulate the composition of the three phytoplankton size classes. It results that, during the spring bloom season, micro-phytoplankton dominates in areas of intense vertical winter mixing and deep/intermediate water formation, while in coastal areas micro-phytoplankton dominates in all seasons because of the nutrient supply from the terrestrial inputs. In the Alborán Sea, where the Atlantic inflow modulates the nutrient availability, any predominance of one class over the other two has been observed. The nano-phytoplankton component instead remains widespread over the entire basin along the year, and its contribution to chlorophyll a is of the order of 30–40 %. The largest inter-annual signal occurs in the Northwestern Mediterranean Sea, driven by the year-to-year variation in intensity and extension of the spring bloom, followed by the Alborán Sea, in which the inter-annual variability is strongly modulated by the Atlantic inflow. In absence of sufficient in situ data of community composition, the satellite-based analysis demonstrated that pico-, nano- and micro-phytoplankton classes often coexist. The predominance of one group over the other ones is strongly dependent on the physical and biological processes occurring at the mesoscale. These processes directly influence the nutrient and light availability, which are the principal forcing for the algae growth.
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