196,744 research outputs found
Description, modeling and forecasting of data with optimal wavelets
No full textCascade processes have been used to model many different self-similar systems, as they are able to accurately describe most of their global statistical properties. The so-called optimal wavelet basis allows to achieve a geometrical representation of the cascade process-named microcanonical cascade- that describes the behavior of local quantities and thus it helps to reveal the underlying dynamics of the system. In this context, we study the benefits of using the optimal wavelet in contrast to other wavelets when used to define cascade variables, and we provide an optimality degree estimator that is appropriate to determine the closest-to-optimal wavelet in real data. Particularizing the analysis to stock market series, we show that they can be represented by microcanonical cascades in both the logarithm of the price and the volatility. Also, as a promising application in forecasting, we derive the distribution of the value of next point of the series conditioned to the knowledge of past points and the cascade structure, i.e., the stochastic kernel of the cascade process.
Antonio Turiel, l'expert que va predir l'apagada: "Va ser una irresponsabilitat criminal per part de les grans companyies"
No full text[ES] El científico descarta que las centrales nucleares sean útiles frente a los cortes de luz y promueve el uso de energías renovables, pero estas deben contar con todas las garantías para asegurar un sistema estable[CAT] El científic descarta que les centrals nuclears siguin útils davant dels talls de llum i promou l'ús d'energies renovables, però aquestes han de comptar amb totes les garanties per assegurar un sistema establePeer reviewe
Hottentotta sousai Turiel 2014, sp. n.
No full text<i>Hottentotta sousai</i> Turiel, sp. n. <p>(Figs. 1–3, 6–13, 17, Tables 1–3)</p> <p> <b>http://zoobank.org/urn:lsid:zoobank.org:act:C76DA F62-C628-4AB5-BED1-1663874C964A</b></p> <p> TYPE MATERIAL: <i>Holotype</i> ♂, <b>Morocco</b>: <i>Tan-Tan Province</i>, Tan-Tan, 2011 (CIBIO Sc136). <i>Paratypes</i>: Tan-Tan, 2013, 1 ♀ (CIBIO Sc2389); 6 km ESE of Elkhalona, on R101 heading S from Tan-Tan, 28.028° N 11.357° W, 2011, 1 ♀ im. (CIBIO Sc137); Tan-Tan, 2011, 1 ♂ (CIBIO Sc138); right margin of Oued Draa Valley, 2 km W of the intersection with road N1 heading N from Tan-Tan, 28.544° N 10.957°E, 2011, 1 ♀ (CIBIO Sc142). All types leg. P. Coelho.</p> <p>DISTRIBUTION: Only known from the type locality (Fig. 1).</p> <p> ETYMOLOGY: The specific epithet honors Pedro Sousa, the first author of the work (Sousa et al., 2011) on the genetic diversity of Maghrebian <i>Hottentotta</i> which first pointed at the existence of the new species described herein.</p> <p>DIAGNOSIS: Total length 73–85 mm. Basic coloration dark brown except reddish brown chela of pedipalps. Pedipalps, mesosoma and metasoma reddish dark, brown to black. Carapace and tergites markedly granulated with strong carinae, lacking lyre-shaped configuration. Movable fingers of pedipalps with 14 rows of granules. Surfaces of femur and patella smooth and densely covered with long setation. Sexual dimorphism: a basal lobe/notch combination on the movable finger in males. Metasoma narrow, very densely hirsute, with 10- 8-8-8-5 carinae. Metasomal segment V lacks lobes and spines on the ventrolateral carinae, all granules of the ventrolateral carinae on the same level. Dorsal surface of metasoma smooth, segment V bears two short, inconspicuous carinae. All metasomal segments of both sexes longer than wide. Metasomal segment V length to width ratio 1.6–1.7 in males. Entire body hirsute, pedipalps, legs, lateral and ventral surfaces of metasomal segments usually densely hirsute in both sexes. Vesicle sparsely hirsute. Pectinal teeth number 34–36 in males, 30–31 in females.</p> <p>DESCRIPTION (based on male holotype):</p> <p> <i>Coloration</i>: Basic coloration dark brown except reddish brown chelae of pedipalp. Chelicerae reticulate. Vesicle reddish brown with darkening aculeus.</p> <p> <i>Carapace</i>: Central ocular, lateral ocular, central lateral, central median and posterior median carinae of carapace are strongly marked and covered by some marked granules, sparsely hirsute, most hairs along the anterior margin.</p> <p> <i>Mesosoma & Tergites</i>: All tergites markedly granulated and with three strong carinae. Almost all hairs along the posterior margin of the tergites, except the tergite VII; tergite VII with five carinae, one axial and in each case two proximal connected lateral carinae. Sternites finely granulated and sparsely hirsute; sternite V with two medial and two lateral carinae. Pectinal teeth number 34.</p> <p> <i>Pedipalps</i>: Chela externally with short macrosetation, movable finger with 14 rows of denticles and five terminal denticles. Trichobothrium <i>db</i> on fixed finger situated at the level of <i>et</i>. Conspicuous basal lobe/notch combination. Patella with eight carinae and covered densely with numerous setae; L/W ratio of 2.8. Femur with five carinae, internal carinae irregular scattered and covered densely with numerous setae with a L/W ratio of 3.2; manus slightly wider than patella in males; trichobothrial pattern orthobothriotaxic of type A-ss (beta).</p> <p> <i>Metasoma & Telson</i>: All metasomal segments of both sexes longer than wide and densely hirsute. Metasomal segment I with ten well-marked regular carinae, intercarinal tegument sparsely granulated except between the dorsal and dorsolateral area covered with two to three conspicuous granules. Metasomal segment II with eight well-marked regular carinae with incomplete lateral carinae reduced by four to five granules, intercarinal tegument sparsely granulated. Metasomal segment III with eight well-marked regular carinae, intercarinal tegument sparsely granulated; lateral carinae reduced to one granule; L/W ratio 1.4. Metasomal segment IV with eight well marked regular carinae, inter-carinal tegument sparsely granulated, L/W ratio 1.6. Metasomal segment V with eight well marked regular carinae, intercarinal tegument moderately granulated; dorsal furrow of metasoma smooth, only IV and V segments bear two inconspicuous carinae. Telson sparsely hirsute with some granules and becoming distally weaker.</p> <p> <i>Legs</i>: smooth except external surface of femur, covered with some finely granulation and with wellmarked carinae. Dorsal surface of patella smooth with well-marked carinae but without granules, internal surface with some scattered spines with macrosetae. Tibia and tarsus covered with macrosetae and ventrally with spiniform setae. Prolateral and retrolateral spurs presenting in all legs. Tibial spurs presenting in legs three and four. Tarsus ventrally with two rows of 6–7 spiniform setae each.</p> <p> <b>Ecological Notes</b></p> <p>Throughout the year, there is virtually no rainfall in the Tan-Tan region. About 95 mm of precipitation fall annually. The driest month is August. Most precipitation falls in winter, with an average of 30 mm in December. The average annual temperature is 20.4 °C. The warmest month is August with an average temperature of 24.2°C. In January, the average temperature is 16.1 °C, the lowest average temperature of the year. The difference in precipitation is 30 mm between the wettest and the driest months. The average temperatures vary during the year by 8.1 °C (http://de.climate-data.com).</p> <p> The new species could have been isolated during the past 192,000 years. Castañeda et al. (2009) reported three wet periods within this time. In this fertile age of the Sahara, there was a continuous stream presented in the Oued Draa River, which formed a natural barrier (Osborne et al., 2008) and may have separated the Low Draa clade from the central clade (<i>sensu</i> Sousa et al., 2011). Our specimen localities, however, show that this barrier is now overcome (see localities of Sc142 & Sc143) and more extensive distribution northwards could be possible.</p> <p> Unfortunately, I have no satisfying habitat information. Judging from similar tarsal armature, <i>H. sousai</i> <b>sp.n.</b> could be semi-lithophilic as its allopatric sister species <i>H. gentili</i>, which is found in rocky habitats, bark of palm trees, palm gardens, oases, and along river beds (Arabic: Oueds) with dense palm tree vegetation (personal observation in September 2013).</p> <p> <b>Affinities and Key</b></p> <p> <i>H. sousai</i> <b>sp. n.</b> is similar to <i>H. gentili</i>, with which it shares most combinations of characters, but can be distinguished from all other Maghreb <i>Hottentotta,</i> by a conspicuous basal lobe/notch combination in males; stronger setation in nearly all body parts, especially patella and femur of pedipalps; and lower length to wide ratio of the fourth metasomal segment in males. Furthermore, I want to note a difference in the intercarinal tegument between the dorsal and dorsolateral carinae of the first metasomal segment, which is covered with one to four granules, whereas all samples of <i>H. gentili</i> bear four to twelve granules and are not always arranged in parallel fashion. However, I am not sure if this feature represents a constant difference; this could be a random variation.</p> <p> Diagnosis of <i>H. gentili</i> was published by Kovařík & Ojanguren Affilastro (2013: 164) who also presented a key of all <i>Hottentotta</i> species. In #4 of their key to African <i>Hottentotta</i> on page 160 there is a printing error that should be, according to F. Kovařík (pers. comm.), corrected as follows:</p> <p> 4. Legs yellow................ <i> <i>H</i>. <i>franzwerneri</i> (Birula, 1914) – Legs black or reddish brown…………………………. ……………………………….. <i> <i>H</i>. <i>gentili</i> (Pallary, 1924)</i></i></p> <p> With inclusion of <i>H. sousai</i> <b>sp. n.</b>, this key to African <i>Hottentotta</i> changes as follows:</p> <p> 4. Legs yellow. ……...... <i> <i>H</i>. <i>franzwerneri</i> (Birula, 1914) – Legs black or reddish brown. ……………............. 4a.</i></p> <p> 4a. Pedipalp lobe/notch combination in males moderately expressed. Length/width ratio of metasomal segment IV>1.8. Dorsal surface of the patella and femur of the pedipalps and metasoma moderately hirsute ……. ………………………..…….... <i>H. gentili</i> (Pallary, 1924) - Pedipalp lobe/notch combination in males strongly expressed. Length/width ratio of metasomal segment IV <1.8. Dorsal surface of the patella and femur of the pedipalps and metasoma very densely hirsute ……….. …………………..…….……..… <i>H. sousai</i> Turiel, <b>sp. n.</b></p> <p> <b>Comparative Material Studied</b></p> <p> <i>Hottentotta franzwerneri</i> (Birula, 1914): <b>Morocco</b>, Figuig, 32.104° N, 1.225° W, 1 ♂, 1 ♀ im. (RTOC).</p> <p> <i>Hottentotta gentili</i> (Pallary, 1924): <b>Morocco</b>, near Quarzazate, leg. G. Molisani, 2 ♂, 1 ♀ im. (NHMW); near Quarzazate, leg. G. Molisani, 2 ♀ (RTOC); road N9 between Quarzazate and Agdz, 30.842° N, 6.873° W, leg. C. Weber, 2 ♂, 1 ♀ im. (RTOC); Tiguezmert, 29.712° N, 7.972° W, leg. M. Stockmann, 1 ♀ (RTOC); Agadir, 30.428° N, 9.613° W, leg. M. Stockmann, 1 ♂, 1 ♂ im. (RTOC); unknown locality, leg. L. Georg, 3 ♂ (NHMW).</p>Published as part of <i>Turiel, Carlos, 2014, A new species of Hottentotta Birula, 1908 (Scorpiones: Buthidae) from southern Morocco, pp. 1-9 in Euscorpius 181</i> on pages 1-8, DOI: 10.18590/euscorpius.2014.vol2014.iss181.1, <a href="http://zenodo.org/record/5508049">http://zenodo.org/record/5508049</a>
Análisis de materiales arqueológicos mediante ablación por laser-ICP-MS
No full textFernandez-Turiel J. L., Gimeno D., Cabañas M., López Vera A., Edo M., Blasco A., Villalba M.J. Análisis de materiales arqueológicos mediante ablación por laser-ICP-MS. Rubricatum, ISSN 1135-3791, 1995, 1: 223-225.[EN] This work shows the application of a system of inductively coupled plasma - mass spectrometry (ICP-MS) using a laser ablation microprobe (LAM) to determine the concentrations of more than forty trace elements in archaeological samples made up of the natural aluminum phosphate of green colour called varisicite.[ES] Se describe la técnica analítica de la espectrometría de masas con fuente de plasma acoplado inducidamente (ICP-MS) equipada con un sistema de ablación con láser, haciendo especial referencia a su aplicación al análisis de más de cuarenta elementos trazas en muestras arqueológicas compuestas por el fosfato alumínico natural de color verde denominado variscita.Peer reviewe
Mineralogía del prospecto Bajo Agua Tapada, Catamarca, Argentina
No full textGimeno Torrente D., Carrazana Di Lucia A., Bruna Novillo J., Fernandez–Turiel J. L. Mineralogía del prospecto Bajo Agua Tapada, Catamarca, Argentina. Macla, ISSN 2659-9864, 2011, 15, 99-100.[ES] El objeto de este trabajo es la definición por vez primera de las asociaciones minerales (menas productivas y paragénesis de alteración hidrotermal) del llamado Prospecto Bajo Agua Tapada, de cara a la realización de una primera valoración de su interés; este trabajo se ha realizado tanto mediante mapeo y muestreo superficial como tras el estudio (mineralógico y geoquímica) de unos 2800 m de sondeos realizados a testigo continuo.Empresa Minera Alumbrera Ltd.Peer reviewe
Dataset of total and nitric acid soluble element concentrations from stream sediments of the Upper Garonne Basin, Val d'Aran, Central Pyrenees
No full text1) For whole rock: sieved <180 µm size fraction, pulverized in a vibrating cup laboratory mill, 0.1 g sample digested in HNO3:HClO4:HF (2.5:2.5:5.0, v/v), doubly evaporated to incipient dryness, addition 1 mL HNO3, and made up to 100 mL with Milli-Q Plus ultrapure water type (18.2 MΩ/cm) ; 2) For nitric acid leaching: 0.1 g sample mixed with 1 mL de HNO3 in 12×100-mm polypropylene test tubes In batch experiments, and made up to 100 mL with Milli-Q Plus ultrapure water type (18.2 MΩ/cm). Final solutions were analysed by HR-ICP-MS. Contact person: Fernandez-Turiel, J. L., [email protected] dataset comprises the total and the acid nitric soluble element concentrations of major and trace elements (Si, Ti, Al, Fe, Mn, Mg, Ca, Na, K, P, LOI, As, Ba, Be, Ce, Co, Cr, Cs, Cu, Dy, Er, Eu, Ga, Gd, Ge, Hf, Ho, La, Li, Lu, Mo, Nd, Ni, Pb, Pr, Rb, Sb, Sc, Sm, Sn, Sr, Tb, Th, Tm, U, V, Y, Yb, Zn, Zr) in stream sediments of the Garonne River watershed in the Val d'Aran in the Central Pyrenees. We used samples collected in 1981 in a pilot project of stream sediment geochemistry. The results of nitric acid leachates are used as proxies of the environmentally available fraction of such elements. The samples represents the lithogeochemical units consisting of the Maladeta-Marimanya granitoids, and the metasediments occurring in an extensive area of the basin.Peer reviewe
Dataset of SEM images, modelled isopach map and topographic profiles, radiocarbon ages and data of parameters of Tephra2 and AshCalc codes of Holocene volcanic ashes of NW Argentina
No full textMaterial suplementario (Figuras S1-S4 y Tablas S1-S4 del artículo Fernandez-Turiel, J.-L.; Perez-Torrado, F. J.; Rodriguez-Gonzalez, A.; Saavedra, J.; Carracedo, J. C., Rejas, M.; Lobo, A.; Osterrieth, M.; Carrizo, J. I.; Esteban, G.; Gallardo, J.; Ratto, N. (2019). The large eruption 4.2 ka cal BP in Cerro Blanco, Central Volcanic Zone, Andes: Insights to the Holocene eruptive deposits in the southern Puna and adjacent regions. Estudios Geológicos 75(1): e088. https://doi.org/10.3989/egeol.43438.515This dataset compiles SEM images, modelled isopach map and topographic profiles, and data of radiocarbon ages, parameters of Tephra2 and AshCalc codes of Holocene volcanic ashes of of Southern Puna and neighbouring areas (NW Argentina). SEM images detail differences among the Bolsón de Fiambalá, Cerro Blanco and Cueros de Purulla fallout ash deposits. Tephra2 code was used to simulate the ash fallout, and the AshCalc code to compare different methods for ash volume estimates associated with the 4.2 ka cal BP eruption of the Cerro Blanco Volcanic Complex. Topographic profiles are used to explain the secondary thickening of fallout ash deposits.MINECO, CGL2011-23307, Proyecto QUECAPeer reviewe
Hemodynamic response to somatostatin at rest and during sympathetic activation in idiopathic orthostatic hypotension
No full textIdiopathic orthostatic hypotension (IOH) represents a degenerative disorder of the peripheral nervous system characterized by low values of arterial blood pressure during orthostatism, with reduction in serum catecholamines. Since treatment of symptomatic IOH has been unsatisfactory till now, we studied the hemodynamic response to somatostatin (S) (Octreotide, 100 micrograms sc) at rest (R) and during sympathetic activation (tilting, T) by means of 2D and/or color Doppler echocardiography, in 5 ambulatory IOH patients (4M, 1F; aged 65 +/- 5 years), with simultaneous recording of blood pressure and heart rate. Post-S, an increased blood pressure was evident during T without heart rate modifications (pre- vs post-S, SAP: 92 +/- 9 vs 148 +/- 12; DAP: 61 +/- 4 vs 90 +/- 9 mmHg; p less than 0.05), while systolic echo parameters did not change significantly. Doppler aortic velocity curve showed during T a reduction of Vmax (pre- vs post-S: 0.98 +/- 0.09 vs 0.73 +/- 0.03 m/s; p less than 0.05) and of cardiac output, due to unchanged preload. Pre-S, at rest, Doppler mitral velocity curve presented a normal E/A ratio as in normal subjects, with a reduced E peak and an increased A peak post-S, indirect signs of increased afterload. Pre-S, E and A peak velocities underwent progressive decrease during T, markedly more evident post-S. Total peripheral resistance, at rest and during T, increased post-S too (pre- vs post-S, rest: 2406 +/- 267 vs 3162 +/- 599; T: 1634 +/- 201 vs 2784 +/- 425 dyne*s/cm-5; p less than 0.05
Dataset of particle size distribution data of Holocene volcanic ashes of NW Argentina
No full textGrain size distributions were determined in volcanic ash samples using a Malvern Mastersizer 2000 particle analyser, equipped with a laser diffractometer (ultrasonic water disaggregation: Hydro MU system; absorption: 0.1; refractive index: 1.52; measurement time: 20 s; obscuration: 10–20%; and pump speed: 2500 rpm, 3 measures), following the recommended procedures of the International Volcanic Health Hazard Network (IVHHN, www.ivhhn.org). This technique measures particles of 0.1–1000 μm using the Mie Theory; due to this limitation, only distal ash samples with maximum grain sizes of < 1 mm for the complete deposit (not grain fractionated) were analysed. The particle-size abundance is reported as the volume percentage of equivalent spherical diameter. Contact person: Fernandez-Turiel, J. L., [email protected] dataset includes particle size distribution data of volcanic ashes of Southern Puna and neighbouring areas (NW Argentina). The content of particles of 0.1–1000 μm was determined by lasser diffraction. The studied volcanic materials are mainly associated with the 4.2 ka cal BP eruption of the Cerro Blanco Volcanic Complex. Some samples area related to the Cueros de Purulla volcano.MINECO, CGL2011–23307N
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