734 research outputs found

    Analysis of antenal sensilla patterns of Rhodnius prolixus from Colombia and Venezuela

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    Antennal sensilla patterns were used to analyze population variation of domestic Rhodnius prolixus from six departments and states representing three biogeographical regions of Colombia and Venezuela. Discriminant analysis of the patterns of mechanoreceptors and of three types of chemoreceptors on the pedicel and flagellar segments showed clear differentiation between R. prolixus populations east and west of the Andean Cordillera. The distribution of thick and thin-walled trichoids on the second flagellar segment also showed correlation with latitude, but this was not seen in the patterns of other sensilla. The results of the sensilla patterns appear to be reflecting biogeographic features or population isolation rather than characters associated with different habitats and lend support to the idea that domestic R. prolixus originated in the eastern region of the Andes.Fil: Esteban, Lyda. Universidad Industrial de Santander; ColombiaFil: Angulo, Víctor Manuel. Universidad Industrial de Santander; ColombiaFil: Dora Feliciangeli, M.. Universidad de Carabobo; VenezuelaFil: Catala, Silvia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de Catamarca. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Secretaría de Industria y Minería. Servicio Geológico Minero Argentino. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Provincia de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja; Argentin

    Inferencialidad y participación: Humor, ironía y metáfora en la publicidad actual.

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    Photo-induced luminescence

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    The present paper is a critical review dealing with the characteristics, reaction mechanisms and photoproducts, instrumentation and analytical applications of the photo-induced either chemiluminescence or fluorescence. Special attention is paid to the determination of pesticides by continuous-flow methodologies. The paper is divided into several sections covering the most relevant published papers.Catalá Icardo, M.; Martínez Calatayud, JM. (2008). Photo-induced luminescence. Critical Reviews in Analytical Chemistry. 38(2):118-130. doi:10.1080/10408340802039609S118130382Lukasiewicz, R. J., & Fitzgerald, J. M. (1973). Digital integration method for fluorimetric studies of photochemically unstable compounds. Analytical Chemistry, 45(3), 511-517. doi:10.1021/ac60325a002Aaron, J. J., Villafranca, J. E., White, V. R., & Fitzgerald, J. M. (1976). A Quantitative Photochemical-Fluorimetric Method for Measurement of Nonfluorescent Vitamin K1. Applied Spectroscopy, 30(2), 159-162. doi:10.1366/000370276774456408Coly, A., & Aaron, J.-J. (1998). Fluorimetric analysis of pesticides: Methods, recent developments and applications. Talanta, 46(5), 815-843. doi:10.1016/s0039-9140(97)00366-4Aaron, J.-J., & Coly, A. (2000). Luminescence methods in pesticide analysis. Applications to the environment. Analusis, 28(8), 699-709. doi:10.1051/analusis:2000280699Catalá Icardo, M., Garcı́a Mateo, J. V., & Martı́nez Calatayud, J. (2002). Multicommutation as a powerful new analytical tool. TrAC Trends in Analytical Chemistry, 21(5), 366-378. doi:10.1016/s0165-9936(02)00505-8Coly, A. (1999). Photochemically-induced fluorescence determination of sulfonylurea herbicides using micellar media. Talanta, 49(1), 107-117. doi:10.1016/s0039-9140(98)00349-xWerkhoven-Goewie, C. E., Boon, W. M., Praat, A. J. J., Frei, R. W., Brinkman, U. A. T., & Little, C. J. (1982). Preconcentration and LC analysis of chlorophenols, using a styrene-divinyl-benzene copolymeric sorbent and photochemical reaction detection. Chromatographia, 16(1), 53-59. doi:10.1007/bf02258869Scholten, A. H. M. T., Welling, P. L. M., Brinkman, U. A. T., & Frei, R. W. (1980). Use of PTFE coils in post-column photochemical reactors for liquid chromatograph — application to pharmaceuticals. Journal of Chromatography A, 199, 239-248. doi:10.1016/s0021-9673(01)91376-7Batley, G. E. (1984). Use of Teflon components in photochemical reactors. Analytical Chemistry, 56(12), 2261-2262. doi:10.1021/ac00276a066Engelhardt, H., & Neue, U. D. (1982). Reaction detector with three dimensional coiled open tubes in HPLC. Chromatographia, 15(7), 403-408. doi:10.1007/bf02261598Coly, A., & Aaron, J.-J. (1994). Photochemical–spectrofluorimetric method for the determination of several aromatic insecticides. The Analyst, 119(6), 1205-1209. doi:10.1039/an9941901205ALBERTGARCIA, J., ICARDO, M., & CALATAYUD, J. (2006). Analytical strategy photodegradation/chemiluminescence/continuous-flow multicommutation methodology for the determination of the herbicide Propanil. Talanta, 69(3), 608-614. doi:10.1016/j.talanta.2005.10.044Coly, A., & Aaron, J.-J. (1998). Cyclodextrin-enhanced fluorescence and photochemically-induced fluorescence determination of five aromatic pesticides in water. Analytica Chimica Acta, 360(1-3), 129-141. doi:10.1016/s0003-2670(97)00721-6Poulsen, J. B., Birks, K. S., Gandelman, M. S., & Birks, J. W. (1986). Crocheted PTFE reactors for post-column photochemistry in HPLC. Chromatographia, 22(7-12), 231-234. doi:10.1007/bf02268764Martínez Calatayud, J. 1988.Flow Injection Analysis of Pharmaceuticals. Automation in the Laboratory, 458London, UK: Taylor and Francis Ltd.Palomeque, M., Garcı́a Bautista, J. ., Catalá Icardo, M., Garcı́a Mateo, J. ., & Martı́nez Calatayud, J. (2004). Photochemical-chemiluminometric determination of aldicarb in a fully automated multicommutation based flow-assembly. Analytica Chimica Acta, 512(1), 149-156. doi:10.1016/j.aca.2004.02.031Chivulescu, A., Catalá-Icardo, M., Garcı́a Mateo, J. ., & Martı́nez Calatayud, J. (2004). New flow-multicommutation method for the photo-chemiluminometric determination of the carbamate pesticide asulam. Analytica Chimica Acta, 519(1), 113-120. doi:10.1016/j.aca.2004.05.046PAWLICOVÁ, Z., ALBERT-GARCÍA, J. R., SAHUQUILLO, I., GARCÍA MATEO, J. V., CATALÁ ICARDO, M., & MARTÍNEZ CALATAYUD, J. (2006). Chemiluminescent Determination of the Pesticide Bromoxynil by On-line Photodegradation in a Flow-Injection System. Analytical Sciences, 22(1), 29-34. doi:10.2116/analsci.22.29Mervartová, K., Calatayud, J. M., & Icardo, M. C. (2005). A Fully Automated Assembly Using Solenoid Valves for the Photodegradation and Chemiluminometric Determination of the Herbicide Chlorsulfuron. Analytical Letters, 38(1), 179-194. doi:10.1081/al-200043477Coly, A., & Aaron, J.-J. (1999). Sensitive and rapid flow injection analysis of sulfonylurea herbicides in water with micellar-enhanced photochemically induced fluorescence detection. Analytica Chimica Acta, 392(2-3), 255-264. doi:10.1016/s0003-2670(99)00229-9Garcı́a-Campaña, A. M., Aaron, J.-J., & Bosque-Sendra, J. M. (2001). Micellar-enhanced photochemically induced fluorescence detection of chlorophenoxyacid herbicides. Flow injection analysis of mecoprop and 2,4-dichlorophenoxyacetic acid. Talanta, 55(3), 531-539. doi:10.1016/s0039-9140(01)00470-2Parrilla�V�zquez, P., Gil�Garc�a, M. D., Barranco�Mart�nez, D., & Mart�nez�Galera, M. (2005). Application of coupled-column liquid chromatography combined with post-column photochemically induced fluorimetry derivatization and fluorescence detection to the determination of pyrethroid insecticides in vegetable samples. Analytical and Bioanalytical Chemistry, 381(6), 1217-1225. doi:10.1007/s00216-004-3043-xIrace-Guigand, S., Leverend, E., Seye, M. D. G., & Aaron, J. J. (2005). A new on-line micellar-enhanced photochemically-induced fluorescence method for determination of phenylurea herbicide residues in water. Luminescence, 20(3), 138-142. doi:10.1002/bio.817Liu, L., & Guo, Q.-X. (2002). Journal of Inclusion Phenomena and Macrocyclic Chemistry, 42(1/2), 1-14. doi:10.1023/a:1014520830813Frankewich, R. P., Thimmaiah, K. N., & Hinze, W. L. (1991). Evaluation of the relative effectiveness of different water-soluble .beta.-cyclodextrin media to function as fluorescence enhancement agents. Analytical Chemistry, 63(24), 2924-2933. doi:10.1021/ac00024a023Patel, B. M., Moye, H. A., & Weinberger, R. (1991). Postcolumn formation of fluorophores from nitrogenous pesticides by UV photolysis. Talanta, 38(8), 913-922. doi:10.1016/0039-9140(91)80272-2Torrents, A., Anderson, B. G., Bilboulian, S., Johnson, W. E., & Hapeman, C. J. (1997). Atrazine Photolysis:  Mechanistic Investigations of Direct and Nitrate-Mediated Hydroxy Radical Processes and the Influence of Dissolved Organic Carbon from the Chesapeake Bay. Environmental Science & Technology, 31(5), 1476-1482. doi:10.1021/es9607289Dogliotti, L., & Hayon, E. (1967). Flash photolysis of per[oxydi]sulfate ions in aqueous solutions. The sulfate and ozonide radical anions. The Journal of Physical Chemistry, 71(8), 2511-2516. doi:10.1021/j100867a019Pérez-Ruiz, T. (2001). Flow injection determination of methamidophos using online photo-oxidation and fluorimetric detection. Talanta, 54(5), 989-995. doi:10.1016/s0039-9140(01)00369-1Pérez-Ruiz, T., Martínez-Lozano, C., Tomás, V., & Martín, J. (2002). FLOW INJECTION SPECTROFLUORIMETRIC DETERMINATION OF MALATHION IN ENVIRONMENTAL SAMPLES USING ON-LINE PHOTOOXIDATION. Analytical Letters, 35(7), 1239-1250. doi:10.1081/al-120005976Pérez-Ruiz, T., Martínez-Lozano, C., Tomás, V., & Martín, J. (2002). Fluorimetric determination of arsanilic acid by flow-injection analysis using on-line photo-oxidation. Analytical and Bioanalytical Chemistry, 372(2), 387-390. doi:10.1007/s00216-001-1173-yPérez-Ruiz, T., Martı́nez-Lozano, C., Tomás, V., & Martı́n, J. (2001). Flow-injection fluorimetric method for the determination of dimethylarsinic acid using on-line photo-oxidation. Analytica Chimica Acta, 447(1-2), 229-235. doi:10.1016/s0003-2670(01)01299-5Baird, C. 1995.Environmental Chemistry, 509–510. New York: W. H. Freeman and Company.Bauer, R., & Fallmann, H. (1997). The Photo-Fenton Oxidation — A cheap and efficient wastewater treatment method. Research on Chemical Intermediates, 23(4), 341-354. doi:10.1163/156856797x00565Huston, P. L., & Pignatello, J. J. (1999). Degradation of selected pesticide active ingredients and commercial formulations in water by the photo-assisted Fenton reaction. Water Research, 33(5), 1238-1246. doi:10.1016/s0043-1354(98)00330-3CATASTINI, C., SARAKHA, M., MAILHOT, G., & BOLTE, M. (2002). Iron (III) aquacomplexes as effective photocatalysts for the degradation of pesticides in homogeneous aqueous solutions. The Science of The Total Environment, 298(1-3), 219-228. doi:10.1016/s0048-9697(02)00219-xZepp, R. G., Schlotzhauer, P. F., & Sink, R. M. (1985). Photosensitized transformations involving electronic energy transfer in natural waters: role of humic substances. Environmental Science & Technology, 19(1), 74-81. doi:10.1021/es00131a008Pérez-Ruiz, T., Lozano, C. M., Tomás, V., & Martı́n, J. (2003). Flow injection chemiluminescence determination of carbaryl using photolytic decomposition and photogenerated tris (2,2′-bipyridyl)ruthenium(III). Analytica Chimica Acta, 476(1), 141-148. doi:10.1016/s0003-2670(02)01355-7Pérez-Ruiz, T., Martínez-Lozano, C., Tomás, V., & Martín, J. (2002). Chemiluminescence determination of carbofuran and promecarb by flow injection analysis using two photochemical reactions. The Analyst, 127(11), 1526-1530. doi:10.1039/b207460pMiles, C. J., & Moye, H. A. (1988). Postcolumn photolysis of pesticides for fluorometric determination by high-performance liquid chromatography. Analytical Chemistry, 60(3), 220-226. doi:10.1021/ac00154a007Soto-Chinchilla, J. J., Garcı́a-Campaña, A. M., Gámiz-Gracia, L., Cuadros-Rodrı́guez, L., & Vidal, J. L. M. (2004). Determination of a N-methylcarbamate pesticide in environmental samples based on the application of photodecomposition and peroxyoxalate chemiluminescent detection. Analytica Chimica Acta, 524(1-2), 235-240. doi:10.1016/j.aca.2004.05.084And, S. T., & Aaron, J. J. (1987). Fluorimetric Determination of Non-Fluorescent Dinitroaniline Derivative Herbicides, Using the Photoreduction of Anthraquinone - 2, 6-Disulfonate. Analytical Letters, 20(12), 1995-2009. doi:10.1080/00032718708078040Miles, C. J., & Anson Moye, H. (1987). High performance liquid chromatography with post-column photolysis of pesticides for generation of fluorophores. Chromatographia, 24(1), 628-632. doi:10.1007/bf02688556Patel, B. M., Moye, H. A., & Weinberger, R. (1990). Formation of fluorophores from nitrogenous pesticides by photolysis and reaction with OPA-2-mercaptoethanol for fluorescence detection in liquid chromatography. Journal of Agricultural and Food Chemistry, 38(1), 126-134. doi:10.1021/jf00091a027Durand, G., Barceló, D., Albaigés, J., & Mansour, M. (1990). Utilisation of liquid chromatography in aquatic photodegradation studies of pesticides: A comparison between distilled water and seawater. Chromatographia, 29(3-4), 120-124. doi:10.1007/bf02268696Rosen, J. D., Strusz, R. F., & Still, C. C. (1969). Photolysis of phenylurea herbicides. Journal of Agricultural and Food Chemistry, 17(2), 206-207. doi:10.1021/jf60162a046Lay, J. P., Klein, W., & Korte, F. (1975). Beiträge zur ökologischen Chemie C. Chemosphere, 4(3), 161-168. doi:10.1016/0045-6535(75)90094-6Tanaka, F. S., Hoffer, B. L., & Wien, R. G. (1985). Detection of halogenated biphenyls from sunlight photolysis of chlorinated herbicides in aqueous solution. Pesticide Science, 16(3), 265-270. doi:10.1002/ps.2780160309Pelizzetti, E., Maurino, V., Minero, C., Carlin, V., Tosato, M. L., Pramauro, E., & Zerbinati, O. (1990). Photocatalytic degradation of atrazine and other s-triazine herbicides. Environmental Science & Technology, 24(10), 1559-1565. doi:10.1021/es00080a016Chukwudebe, A., March, R. B., Othman, M., & Fukuto, T. R. (1989). Formation of trialkyl phosphorothioate esters from organophosphorus insecticides after exposure to either ultraviolet light or sunlight. Journal of Agricultural and Food Chemistry, 37(2), 539-545. doi:10.1021/jf00086a058Durand, G., De Bertrand, N., & Barceló, D. (1991). Applications of thermospray liquid chromatography-mass spectrometry in photochemical studies of pesticides in water. Journal of Chromatography A, 554(1-2), 233-250. doi:10.1016/s0021-9673(01)88453-3WOLFE, N., ZEPP, R., & PARIS, D. (1978). Carbaryl, propham and chlorpropham: A comparison of the rates of hydrolysis and photolysis with the rate of biolysis. Water Research, 12(8), 565-571. doi:10.1016/0043-1354(78)90134-3Samanidou, V., Fytianos, K., Pfister, G., & Bahadir, M. (1988). Photochemical decomposition of carbamate pesticides in natural waters of northern Greece. Science of The Total Environment, 76(1), 85-92. doi:10.1016/0048-9697(88)90287-2Konstantinou, I. K., Sakkas, V. A., & Albanis, T. A. (2001). Photocatalytic degradation of the herbicides propanil and molinate over aqueous TiO2 suspensions: identification of intermediates and the reaction pathway. Applied Catalysis B: Environmental, 34(3), 227-239. doi:10.1016/s0926-3373(01)00218-1Machado, F., Collin, L., & Boule, P. (1995). Photolysis of bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) in aqueous solution. Pesticide Science, 45(2), 107-110. doi:10.1002/ps.2780450203Boule, P., Guyon, C., & Lemaire, J. (1982). Photochemistry and environment IV- Photochemical behaviour of monochlorophenols in dilute aqueous solution. Chemosphere, 11(12), 1179-1188. doi:10.1016/0045-6535(82)90031-5Almansa Lopez, E. (2003). Simultaneous quantification of chlorophenoxyacid herbicides based on time-resolved photochemical derivatization to induce fluorescence in micellar medium. Talanta, 60(2-3), 355-367. doi:10.1016/s0039-9140(03)00109-7Garcia, L. F., Eremin, S., & Aaron, J.-J. (1996). Flow-Injection Analysis of Chlorophenoxyacid Herbicides using Photochemically Induced Fluorescence Detectiona. Analytical Letters, 29(8), 1447-1461. doi:10.1080/00032719608001493Lahuerta Zamora, L., Fuster Mestre, Y., Duart, M. J., Antón Fos, G. M., García Doménech, R., Gálvez Álvarez, J., & Martínez Calatayud, J. (2001). Prediction of the Chemiluminescent Behavior of Pharmaceuticals and Pesticides. Analytical Chemistry, 73(17), 4301-4306. doi:10.1021/ac010133iGómez-Taylor Corominas, B. (2003). Prediction of the chemiluminescent behaviour of phenols and polyphenols. Talanta, 60(2-3), 623-628. doi:10.1016/s0039-9140(03)00105-xPolo Martí, E., Catalá Icardo, M., Lahuerta Zamora, L., Antón Fos, G. M., & Martínez Calatayud, J. (2004). Theoretical prediction of the chemiluminescence behaviour of the ergot alkaloids. Analytica Chimica Acta, 527(2), 177-186. doi:10.1016/j.aca.2004.07.026P�rez-Ruiz, T., Mart�nez-Lozano, C., Tom�s, V., Sanz, A., & Garre, R. (2003). Flow Injection Spectrophotometric Determination of Ferbam Based on a Photochemical Reaction. Microchimica Acta, 142(4), 231-235. doi:10.1007/s00604-003-0027-zRoda, A., Rauch, P., Ferri, E., Girotti, S., Ghini, S., Carrea, G., & Bovara, R. (1994). Chemiluminescent flow sensor for the determination of Paraoxon and Aldicarb pesticides. Analytica Chimica Acta, 294(1), 35-42. doi:10.1016/0003-2670(94)85043-7Maniasso, N., Zagatto, E. A. G., Reis, S., Santos, J. L. M., & Lima, J. L. F. C. (1999). Exploitation of micellar medium for photochemical-spectrofluorimetric flow-injection determination of fenvalerate. Laboratory Automation & Information Management, 34(2), 143-148. doi:10.1016/s1381-141x(99)00016-7Vı́lchez, J. ., Valencia, M. ., Navalón, A., Molinero-Morales, B., & Capitán-Vallvey, L. . (2001). Flow injection analysis of the insecticide imidacloprid in water samples with photochemically induced fluorescence detection. Analytica Chimica Acta, 439(2), 299-305. doi:10.1016/s0003-2670(01)01039-

    CAMERA – Mobility Report 3

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    The EU-funded CAMERA (Coordination and Support Action for Mobility in Europe: Research and Assessment) project is coordinated by The Innaxis Foundation and Research Institute (Spain), in partnership with the University of Westminster (UK), Bauhaus Luftfahrt (Germany), EUROCONTROL (France-Belgium) and DeepBlue (Italy). It was launched in November 2017 for a duration of 48 months. The project investigates research initiatives into the European transport system from 2007, with a special focus on air travel, its integration with other transport modes, and passenger experience. Each year CAMERA assesses projects from different research programmes to deliver a European view of the state of aviation and mobility-related research activities. For this, the team relies on two main corner stones to its project approach: 1) the systematic development of a Performance Framework to provide a means of measuring; and 2) state-of-the-art algorithms for an automated analysis of the research projects

    Cultural differences in personality and aggressive behavior in intimate partner violence offenders: a comparison of English and Spanish offenders

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    Intimate partner violence (IPV) is a ubiquitous and serious problem, the prevalence of which varies greatly around the world. Previous research shows that cultural factors interact with personality and that this interaction influences cognitions, attitudes, and behaviors that are related to personal and individual styles of resolving conflicts. In relation to this, the present study has three aims: comparing the self-reported IPV (physical, psychological and sexual) of English and Spanish offenders, comparing the Millon Clinical Multiaxial Inventory III (MCMI-III) scores of the two groups, and examining the association between country of origin, psychopathology, and IPV. The sample consists of 147 IPV offenders (80 English and 67 Spanish). The measures used were the MCMI-III and the Conflict Tactics Scale 2. The Mann−Whitney U tests were used to compare the English and Spanish sample, and independent logistic regressions were used to examine the relationship between personality patterns, psychopathology and culture, and IPV. Higher frequencies of physical and psychological aggression were found in the English group compared with the Spanish group as well as several differences in personality patterns and psychopathology between the groups. Some MCMI-III subscales also interact with nationality and predict physical and psychological aggression. The relevance of these results for intervention is discussed. </jats:p

    Preliminary assessment of terrestrial microalgae isolated from lichens as testing species for environmental monitoring: Lichen phycobionts present high sensitivity to environmental micropollutants

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    Bioassays constitute a tool for pollution analysis providing a holistic approach and high-quality indication of the toxicity. Microbioassays allow evaluating the toxicity of many samples, implying lower costs and enabling routine monitoring and pollution control. But tests conducted so far are limited to the use of a small number of taxa. Lichens are excellent bioindicators of pollution with great ecological significance. Studies show that the phycobiont is more sensitive to pollutants than the mycobiont. Phycobiont have features such as adaptation to anhydrobiosis and relatively rapid growth in vitro, making them suitable for microbioassays. Our aim is to determine the sensitivity of phycobionts to the pharmaceutical micropollutants carbamazepine and diclofenac as a preliminary step for the development of a toxicity microbioassay based on phycobionts. Optical dispersion and chlorophyll autofluorescence were used as endpoints of toxicity on two algal species showing that suspensions present cyclic and taxon specific patterns of aggregation. Trebouxia TR9 suspensions present a very high grade of aggregation while Asterochloris erici cells do not. Both micropollutants alter optical properties of the suspensions of both species. No significant alteration of chlorophyll autofluorescence by carbamazepine is observed. A. erici chlorophyll autofluorescence is extremely sensitive to diclofenac but the effect is not dependent on the drug concentration or on the time of exposure. Differently, TR9 only shows punctual chlorophyll alterations. Fluctuations in optical dispersion may indicate changes in the population structure of the species, including reproductive strategy. A. erici seems more sensitive to micropollutants, is better characterized and is available from commercial collections

    Stretched exponential relaxation for growing interfaces in quenched disordered media

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    We study the relaxation for growing interfaces in quenched disordered media. We use a directed percolation depinning model introduced by Tang and Leschhorn for 1+1-dimensions. We define the two-time autocorrelation function of the interface height C(t',t) and its Fourier transform. These functions depend on the difference of times t-t' for long enough times, this is the steady-state regime. We find a two-step relaxation decay in this regime. The long time tail can be fitted by a stretched exponential relaxation function. The relaxation time is proportional to the characteristic distance of the clusters of pinning cells in the direction parallel to the interface and it diverges as a power law. The two-step relaxation is lost at a given wave length of the Fourier transform, which is proportional to the characteristic distance of the clusters of pinning cells in the direction perpendicular to the interface. The stretched exponential relaxation is caused by the existence of clusters of pinning cells and it is a direct consequence of the quenched noise.Comment: 4 pages and 5 figures. Submitted (5/2002) to Phys. Rev.

    Optimal Production Planning of Concentrated Apple and Pear Juice Plants

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    This paper presents a mathematical model aimed at optimizing the yearly profit of a concentrated apple and pear juice plant through the appropriate design of its production plan. This study assumes a business scenario where the products are devoted to the international market and therefore the production schedule is dictated by a fluctuating prices scenario due to the worldwide supply/demand tradeoff. Moreover, raw fruit is available only during the relatively short harvest season and suffers juice yield reduction during storage. In this context, decisions related to the manufacturing of each juice variety to exploit favorable prices, while minimizing juice yield loss due to fruit aging are not intuitive. Scenario studies, together with sensitivity analysis on some model parameters are developed to illustrate the performance of the proposed approach.Sociedad Argentina de Informática e Investigación Operativ

    Optimal Production Planning of Concentrated Apple and Pear Juice Plants

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    This paper presents a mathematical model aimed at optimizing the yearly profit of a concentrated apple and pear juice plant through the appropriate design of its production plan. This study assumes a business scenario where the products are devoted to the international market and therefore the production schedule is dictated by a fluctuating prices scenario due to the worldwide supply/demand tradeoff. Moreover, raw fruit is available only during the relatively short harvest season and suffers juice yield reduction during storage. In this context, decisions related to the manufacturing of each juice variety to exploit favorable prices, while minimizing juice yield loss due to fruit aging are not intuitive. Scenario studies, together with sensitivity analysis on some model parameters are developed to illustrate the performance of the proposed approach.Sociedad Argentina de Informática e Investigación Operativ

    Ecological Imagination in Spanish Comics

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    En este ensayo, señalamos la gran diversidad de obras en la historia del cómic español que se preocupan por temas ecológicos, establecen alianzas con movimientos ecologistas, y que desarrollan una crítica ecológica del capitalismo contemporáneo y la cultura de consumo. Abogamos por el estudio ecocrítico del cómic de cualquier temática (un enfoque relativamente ausente en el campo) y por el empleo del cómic para una concienciación ecológica fundamentalmente crítica de las estructuras de poder y el metabolismo del capitalismo globalizado y para el desarrollo de formas «ecológicas» de representar la actualidad.In this essay, we highlight the significant diversity of works in the history of Spanish comics that engage ecological concern, alliances with environmentalist movements, and ecological critiques of contemporary capitalism and consumer society. We signal the need for more ecocritical studies of comics of all topics and highlight the potential of comics for promoting an ecological awareness that is fundamentally critical of the power structures and metabolism of global capitalism and for developing «ecological» modes of storytelling
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