bluuebunny/crossref_metadata_2025 huggingface dataset:
A Novel Thiophene-Fused Polycyclic Aromatic with a Tetracene Core: Synthesis, Characterization, Optical and Electrochemical Properties
Authors: Duan Zong-Fan , Huang Xian-Qiang , Yang Zhi-Gang , Hoshino Daiki , Kitanaka Susumu , Zhao Gao-Yang , Nishioka Yasushiro
Published: May 2011

FeCl3-mediated oxidative cyclization was successfully used to construct an extended thiophene-pendant pyrene skeleton and synthesize a novel thiophene-fused polycyclic aromatic (THTP-C) with a tetracene core. The identity of the compound was confirmed by 1H-NMR, 13C-NMR, MS, and elemental analysis. Meanwhile, a single crystal of THTP-C was obtained and analyzed by X-ray single-crystal diffraction. THTP-C has a “saddle” shaped π-conjugated 1-D supramolecular structure, and favors highly ordered self-assembly by π-π interactions as evidenced by its concentration-dependent 1H-NMR spectra in solution. The optical properties of THTP-C were investigated by ultraviolet-visible (UV-Vis) and photoluminescence (PL) spectroscopy and its electrochemical properties were investigated by cyclic voltammetry (CV). The relatively large band gap (2.86 eV), low EHOMO level (−5.64 eV) and intermolecular π-π interactions imply that THTP-C has a high stability against photo-degradation and oxidation, and may be a promising candidate for stable hole-transporting materials.
Catalytic Synthesis of α-Oxoketene S,S-Acetals in a Wet Ionic Liquid [Bmim]Cl/H2O Homogeneous System
Authors: Yu Ping , Zu Yuangang , Fu Yujie , Efferth Thomas
Published: May 2011

A clean, practical and environmentally friendly synthesis in a homogeneous system has been developed for α-oxoketene S,S-acetals. A mixture of [Bmim]Cl and water was used as medium. The best economical and practical molar ratio of [Bmim]Cl to substrate was 4 to 1. With various types of 1,3-dicarbonyl compounds as substrate, the corresponding α-oxoketene S,S-acetals have been prepared under mild reaction conditions with yields of 53–74% after purification with silica gel column. [Bmim]Cl/water can be recycled several times.
Using Light Scattering to Screen Polyelectrolytes (PEL) Performance in Flocculation
Authors: Rasteiro Maria G. , Pinheiro Ineide , Garcia Fernando A. P. , Ferreira Paulo , Hunkeler David
Published: May 2011

Flocculation of precipitated calcium carbonate (PCC) was monitored using light diffraction spectroscopy (LDS). Four cationic polyacrylamides of high molar mass and with different degrees of branching, all copolymers of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (Q9), were tested. LDS supplied information about the kinetic curves for flocs growth and also for the flocs structure evolution. Flocculation kinetics, flocs size and structure, flocs resistance and reflocculation capacity could be correlated with the degree of branching of the polyelectrolytes (PEL). Furthermore, PEL with different degrees of branching corresponded to different values for the intrinsic viscosity, indicating differences in the polymer conformation, which explained well the performance differences in flocculation.
Assessment of Acacia Koa Forest Health across Environmental Gradients in Hawai‘i Using Fine Resolution Remote Sensing and GIS
Authors: Morales Rodolfo Martinez , Idol Travis , Friday James B.
Published: May 2011

Koa (Acacia koa) forests are found across broad environmental gradients in the Hawai‘ian Islands. Previous studies have identified koa forest health problems and dieback at the plot level, but landscape level patterns remain unstudied. The availability of high-resolution satellite images from the new GeoEye1 satellite offers the opportunity to conduct landscape-level assessments of forest health. The goal of this study was to develop integrated remote sensing and geographic information systems (GIS) methodologies to characterize the health of koa forests and model the spatial distribution and variability of koa forest dieback patterns across an elevation range of 600–1,000 m asl in the island of Kaua‘i, which correspond to gradients of temperature and rainfall ranging from 17–20 °C mean annual temperature and 750–1,500 mm mean annual precipitation. GeoEye1 satellite imagery of koa stands was analyzed using supervised classification techniques based on the analysis of 0.5-m pixel multispectral bands. There was clear differentiation of native koa forest from areas dominated by introduced tree species and differentiation of healthy koa stands from those exhibiting dieback symptoms. The area ratio of healthy koa to koa dieback corresponded linearly to changes in temperature across the environmental gradient, with koa dieback at higher relative abundance in warmer areas. A landscape-scale map of healthy koa forest and dieback distribution demonstrated both the general trend with elevation and the small-scale heterogeneity that exists within particular elevations. The application of these classification techniques with fine spatial resolution imagery can improve the accuracy of koa forest inventory and mapping across the islands of Hawai‘i. Such findings should also improve ecological restoration, conservation and silviculture of this important native tree species.
Effects of Al(III) and Nano-Al13 Species on Malate Dehydrogenase Activity
Authors: Yang Xiaodi , Cai Ling , Peng Yu , Li Huihui , Chen Rong Fu , Shen Ren Fang
Published: May 2011

The effects of different aluminum species on malate dehydrogenase (MDH) activity were investigated by monitoring amperometric i-t curves for the oxidation of NADH at low overpotential using a functionalized multi-wall nanotube (MWNT) modified glass carbon electrode (GCE). The results showed that Al(III) and Al13 can activate the enzymatic activity of MDH, and the activation reaches maximum levels as the Al(III) and Al13 concentration increase. Our study also found that the effects of Al(III) and Al13 on the activity of MDH depended on the pH value and aluminum speciation. Electrochemical and circular dichroism spectra methods were applied to study the effects of nano-sized aluminum compounds on biomolecules.
Innovative LIDAR 3D Dynamic Measurement System to Estimate Fruit-Tree Leaf Area
Authors: Sanz-Cortiella Ricardo , Llorens-Calveras Jordi , Escolà Alexandre , Arnó-Satorra Jaume , Ribes-Dasi Manel , Masip-Vilalta Joan , Camp Ferran , Gràcia-Aguilá Felip , Solanelles-Batlle Francesc , Planas-DeMartí Santiago , Pallejà-Cabré Tomàs , Palacin-Roca Jordi , Gregorio-Lopez Eduard , Del-Moral-Martínez Ignacio , Rosell-Polo Joan R.
Published: May 2011

In this work, a LIDAR-based 3D Dynamic Measurement System is presented and evaluated for the geometric characterization of tree crops. Using this measurement system, trees were scanned from two opposing sides to obtain two three-dimensional point clouds. After registration of the point clouds, a simple and easily obtainable parameter is the number of impacts received by the scanned vegetation. The work in this study is based on the hypothesis of the existence of a linear relationship between the number of impacts of the LIDAR sensor laser beam on the vegetation and the tree leaf area. Tests performed under laboratory conditions using an ornamental tree and, subsequently, in a pear tree orchard demonstrate the correct operation of the measurement system presented in this paper. The results from both the laboratory and field tests confirm the initial hypothesis and the 3D Dynamic Measurement System is validated in field operation. This opens the door to new lines of research centred on the geometric characterization of tree crops in the field of agriculture and, more specifically, in precision fruit growing.
Antihypertensive and Metabolic Effects of Telmisartan in Hypertensive HIV-Positive Patients
Authors: Vecchiet Jacopo , Ucciferri Claudio , Falasca Katia , Mancino Paola , Iorio Angelo Di , De Caterina Raffaele
Published: May 2011

Background

Hypertension is more prevalent among HIV-infected individuals than in the general population and contributes to increased cardiovascular risk. The angiotensin II receptor blocker telmisartan is also a partial peroxisome proliferator activated receptor-γ agonist with documented effects on glucose and lipid homeostasis. The aim of this study was to evaluate the antihypertensive and metabolic effects of telmisartan in hypertensive HIV-positive patients.

Methods

A total of 18 HIV-positive men treated with antiretroviral therapy and recently diagnosed with hypertension were administered 80 mg telmisartan daily. Systolic blood pressure (SBP) and diastolic blood pressure (DBP), viroimmunological and metabolic parameters, insulin resistance, C-reactive protein, microalbuminuria, cystatin C and plasma levels of interleukin-18 and endothelin-1 were measured at baseline (T0), 1 month (T1), 3 months (T3) and 6 months (T6).

Results

Treatment with telmisartan not only decreased SBP and DBP levels, but also improved insulin resistance and microalbuminuria by T1. Levels of triglycerides significantly decreased and high-density lipoprotein cholesterol increased at T1, whereas total and low-density lipoprotein cholesterol levels were statistically reduced at T3 and T6. Cystatin C and endothelin-1 showed a significant reduction at T1, whereas interleukin-18 decreased at both T3 and T6.

Conclusions

Telmisartan was effective in reducing blood pressure and improving lipid metabolism and renal function. Reduction of endothelin-1 might be related to an endothelial protective effect. On the basis of these findings, and because of properties unrelated to blood pressure lowering, telmisartan might be the first choice antihypertensive drug for the treatment of HIV-positive patients.
Intime conviction et subjectivation de l'acte criminel : quelle actualité dans le champ judiciaire ?
Authors: Grihom Marie-José , Ducousso-Lacaze Alain , Massé Michel
Published: May 2011

Résumé L’évolution dans le champ social et judiciaire de la place accordée à la victime a-t-elle des incidences sur la construction de l’intime conviction du magistrat ? Notre intérêt pour l’élaboration de cette croyance, construite en appui sur la logique et la confrontation des éléments à charge et à décharge, vient entre autres motifs de la nécessaire implication personnelle du magistrat dans la construction de son jugement et dans l’adhésion à celui-ci. Or, l’analyse dans la perspective psychanalytique du processus d’intime conviction met en relief un double niveau de conflictualité : d’une part un « conflit psychique induit » par les exigences légales, spécifique au processus lui-même, d’autre part un conflit psychique inhérent à la subjectivité du magistrat. En appui sur l’analyse d’entretiens avec des magistrats à propos d’un dossier de viol intra-familial, sans autre élément de preuve que le poids des paroles et des aveux de la victime, nous dégageons en quoi « la subjectivation de l’acte criminel » est dépendante du rapport du juge aux représentations sociales de la victime mais aussi de sa propre capacité à supporter le conflit psychique induit.
La crise du symbolique et le déclin de l'institution : quels sont les arguments ?
Authors: Ehrenberg Alain
Published: May 2011

Résumé Pour de nombreux observateurs de la vie sociale, nous vivons désormais dans un individualisme non de personnalisation, mais de déliaison, un individualisme devenu destructeur des appartenances collectives et donc des assises personnelles de chacun. Ce discours implique d’examiner de plus près ce que le concept d’institution désigne exactement.
Les psychanalystes au risque de l'idéologie
Authors: Chapelier Jean-Bernard
Published: May 2011

Résumé La psychanalyse et sa capacité à donner du sens aux actes humains est naturellement attractive pour le champ social, mais en sortant de l’espace qui l’a constituée il y a de grands risques qu’elle participe à l’idéologie du moment, cette idéologie est nécessaire à la constitution des groupes sociaux mais elle est aussi impliquée dans les rapports de pouvoir. Ainsi, devenant freudisme ou psychanalysme, la psychanalyse s’érige comme la grande normalisatrice et échoue naturellement dans sa capacité d’écoute de la souffrance humaine. L’auteur, reprenant les travaux de l’anthropologie psychanalytique qui a dû très tôt se poser la question du lien entre l’individuel et le collectif, ainsi que la problématique de l’intériorisation de la culture, propose quelques solutions pour amoindrir ces risques idéologiques.
Les fonctions paternelles aujourd'hui
Authors: De Neuter Patrick
Published: May 2011

Résumé Après avoir précisé les différentes fonctions dites paternelles qui se dégagent de l’enseignement de Lacan et examiné comment ces fonctions s’avèrent très effectives chez les Moso de Chine, une société « sans père ni mari », l’auteur examine comment ces diverses fonctions sont soutenues aujourd’hui, chez nous comme là-bas, par divers agents autres que le père biologique. Il en conclut que, moyennant certaines conditions, la subjectivité d’aujourd’hui n’est pas plus en danger que celle d’hier. Il termine par la question de savoir s’il ne serait pas opportun de parler dorénavant de fonctions tierces symboligènes, subjectivantes et structurantes plutôt que de fonctions paternelles.
À propos de la psychanalyse face à la guerre
Authors: Stitou Rajaa
Published: May 2011

Résumé Quel éclairage théorique ou conceptuel peut apporter la psychanalyse sur ce qui pousse les hommes à la violence et à l’agression ? Que peut-elle dire d’un point de vue clinique face aux extrêmes du lien social, et lorsque la pratique analytique elle même, ou le temps de la cure est traversé par une menace de guerre ou de barbarie, lorsque la pulsion de mort s’éveille à la terreur ? La réponse de Freud à Einstein autour de la question de la guerre est riche d’enseignements. Elle permet un regard autre pour penser ce qui résonne dans le tourment actuel de la civilisation, à travers les nouvelles formes de destructivités et de rigidités identitaires. La mondialisation et ses enjeux de pouvoir, l’hétérogénéité grandissante du fait des émigrations participent à cette actualité, actualité qui ne devrait pas nous faire perdre de vue qu’à travers les remaniements dans l’histoire, c’est le rapport de chaque sujet au désir et à l’inconscient qui est mis en question.
Notre société, une réponse obsessionnelle ?
Authors: Rose Sébastien
Published: May 2011

Résumé Il s’agit de reconnaître, dans les phénomènes actuels de l’évaluation et de la recrudescence des croyances auxquels notre société doit faire face, un fonctionnement proprement psychopathologique. En voulant faire taire l’inconscient et la singularité, notre société scientifique et rationnelle s’avise en fait à exacerber l’incontrôlable et l’imprévu. Elle tend ainsi, pour une part, à favoriser la réponse obsessionnelle face au malaise de la civilisation.
La vie, la mort, l'éthique et le sujet : une exposition de cadavres controversée
Authors: Bouvier-Müh Christine
Published: May 2011

Résumé Des événements récents montrent que notre relation au vivant a changé. Les médias ont largement commenté la spécificité de l’exposition Our Body/À corps ouvert, présentée puis interdite en mars 2009 à Paris. Annoncée comme « artistique » et « éducative », cette exhibition de cadavres et d’organes plastifiés mis en scène a remporté un vif succès dans de nombreux pays où des foules se bousculent pour voir et cotoyer le cadavre promu au rang d’ objet de contemplation. En effaçant la mort de la sphère sociale, nous avons modifié depuis plus d’un siècle notre comportement de vivants. Dans un contexte sociétal marqué par « un individualisme de déliaison » selon l’expression de M. Gauchet, nous introduisons la question de la place du sujet qui dans une logique de démarche scientifique quantitative en sciences du vivant est toujours nécessairement relégué, évacué.
Une protection à haut risque
Authors: Lamour Martine
Published: May 2011

Résumé L’accueil d’un petit enfant maltraité en grande souffrance psychique et affective peut mettre à mal l’équipe d’une pouponnière et exposer l’enfant au risque d’être de nouveau maltraité quand la maltraitance familiale se propage de lien en lien, c’est ce qu’illustre l’histoire de Vincent. Dans ce genre de situation à haut risque, la gravité des processus psychopathologiques à l’œuvre impose des soins psychiques pour l’enfant et ses parents associés à un accompagnement des professionnels.
Le monde à l'envers, enfants qui battent les parents
Authors: Popper Haydée
Published: May 2011

Résumé Au travers de deux situations d’enfants battant les parents, l’auteur construit des hypothèses pour saisir les enjeux individuels, de couple et familiaux sous-jacents à ce phénomène. Dans le cadre plus général des changements sociaux produits sur la représentation de la fonction parentale, l’article aborde les problématiques infantiles des parents instituant des pactes narcissiques de couple et une indifférenciation familiale menant à une défaillance des rôles parentaux. L’auteur s’interroge aussi sur ces enjeux au niveau intrapsychique et examine enfin la période particulière, préadolescence ou adolescence, à laquelle cette problématique se dévoile clairement.
Les évolutions du droit français face aux violences conjugales
Authors: Couturier Mathias
Published: May 2011

Résumé Jusqu’à la fin du xx e siècle, la conception patriarcale de la famille que le système juridique français faisait prévaloir maintenait l’épouse dans une situation de soumission. Face aux violences conjugales, l’autorité publique réagissait peu, voire pas du tout, l’important étant de préserver l’ordre social incarné par une institution familiale traditionnelle pérenne. À partir des années 1970, l’avènement d’une conception personnaliste de la société a amené le droit à modifier son intervention. La protection s’est déplacée de l’institution familiale vers les personnes composant le couple (marié, pacsé, en union libre, homosexuel). La répression s’est durcie et les moyens juridiques de prévention se sont multipliés. La police des mœurs a laissé la place à une police des personnes . Celle-ci n’est désormais pas loin d’une police des corps qui questionne l’auteur : jusqu’où l’État peut-il intervenir dans la vie intime du couple ?
Approche métapsychologique des adolescents et de leur famille en milieu rural
Authors: Haza Marion , Grolleau Émeline
Published: May 2011

Résumé L’article présente une nouvelle approche métapsychologique de l’adolescence en milieu rural développée à partir d’une expérience clinique, celle du dispositif « Lieux-Dits » qui propose dans des communes isolées une prise en charge des jeunes et éventuellement des familles. La fragilisation des liens familiaux amplifiée par l’adolescence et la précarité sociale ne permet plus l’existence d’un espace interne contenant où se subjectiver. Quand les valeurs rurales ne tiennent pas, que l’identité personnelle est menacée par les valeurs familiales, l’adolescent se trouve pris dans un conflit de loyauté. Le passage à l’acte devient moyen de mobiliser la famille et de s’éloigner de l’appareil psychique familial. La création dans la coconstruction de nouveaux espaces, tels les « Lieux-Dits », prend ici tout son sens, comme substitut ou appui apporté au contenant familial.
Les voix, la voix
Authors: Porge Erik
Published: May 2011

Résumé Nous étudions comment Lacan a isolé la voix comme objet  a (avant le regard), en 1959, à partir de son analyse des hallucinations verbales. Comme l’exemplifient des formes d’automatisme verbal, où la sensorialité ne fait pas partie de l’hallucination, neutres, anidéiques, les voix se définissent plus par le rapport du sujet au langage que par l’imaginaire sensoriel. En interprétant les hallucinations de Schreber à l’aide de la topologie du graphe, Lacan est amené à positionner la voix avec celle-ci. Ensuite, après avoir inscrit la formule du fantasme ($<> a ) sur le graphe, il promeut la voix comme objet  a , en référence aux voix, et insiste sur son essence plus temporelle que sonore. Nous avancerons que les particularités de la voix comme objet  a nécessitent une modification du tracé de la pulsion invoquante par rapport aux autres pulsions et que la référence à celle-ci ouvre un accès possible au « se faire entendre » pour ceux qui entendent des voix.
Je n'écrirai jamais sur Lacan
Authors: Jaeglé Claude
Published: May 2011

Résumé Comment celui qui voulut ignorer Lacan finit par lui consacrer un livre.
Eyes wide shut
Authors: Longé Thierry
Published: May 2011

Résumé Que la conception modifiée du rêve que Freud élabore dans son traité travaille à faire la lumière sur les psychoses, tel est l’un des enjeux expressément énoncé dans cet effort d’élucidation du secret du rêve. Qu’on ferme grand les yeux et on hallucine ; qu’on les ouvre, nous dit Freud, et on pense en mots.
La Voix de Sirène
Authors: Bentata Hervé
Published: May 2011

Résumé Le trajet de l’élaboration lacanienne de l’objet  a « voix » rencontre chemin faisant ce que Lacan désigne comme pulsion invocante. C’est à partir de ce point que le présent travail tente une analyse de la structure de l’ Odyssée tant dans la nature des épreuves qui se présentent au héros d’Homère que dans leur succession. C’est ainsi que l’épisode du chant des Sirènes est particulièrement pris en compte dans les différentes dimensions de la voix qui s’y déploient. J’essaierai d’interroger en quoi ces différents aspects de la voix correspondent à la pulsion qui, entre autres, pousse Ulysse dans son périple. Au-delà du pouvoir de capture irrésistible sur autrui de la voix des Sirènes, l’objet  a « voix » se trouve interrogé dans la clinique de l’autisme, ne serait-ce qu’à voir comment les enfants autistes se détournent de la présence d’autrui, et notamment de la voix humaine.
Grasshopper = Grace hoper = Grausssssss… Opr ! (homme)ophonie et rejoycance
Authors: Lauth Marie-Lise
Published: May 2011

Résumé Le titre évoque le plaisir éprouvé par Joyce à tordre le langage. Evidemment ce jeu ne pouvait qu’interpeller Lacan. Joyce nous aide à ouvrir nos oreilles « matelas ». En tant qu’homme, Joyce toujours en dette envers ses amis, est fort peu sympathique, en tant qu’écrivain il, nous fascine. Grâce à une mécène : Miss Weaver, Finnegans Wake, le dernier ouvrage de Joyce, gigantesque, a pu voir le jour. L’auteur avait la prétention d’occuper les universitaires pendant des siècles. Lacan souligne son aspect maniaque. Joyce alla jusqu’à injecter dans son anglais un grand nombre d’autres langues. Finnegans Wake serait une sorte de roue tournant inlassablement, illisible en français. Jacques Aubert, spécialiste de l’écriture joycienne a dû répondre à cette question de Lacan : Joyce était-il fou ? Tenons-nous en à la devise de Joyce : « in risu veritas », mais on peut aussi s’intéresser à la façon dont l’auteur a voulu titiller le réel de la langue à savoir : essayer de décrocher le signifiant du poids du signifié.
La différence des sexes : quelle différence ?
Authors: Hatzfeld Marjolaine
Published: May 2011

Résumé Après un quart de siècle de mise en jachère, Lacan, dans son séminaire La relation d’objet (1956-1957), se réaffronte aux paradoxes de la phase phallique telle que décrite et théorisée par Freud, spécialement dans son versant féminin : le Penisneid. Cet article reprend les données freudiennes de la question, jusque dans leurs conséquences sur la fin de l’analyse, et en retrace les impasses. Il indique comment, fidèle à la découverte freudienne, Lacan en élabore une nouvelle intelligibilité – par l’introduction de ces trois registres de l’imaginaire, du réel et du symbolique, qui permettra de préciser les différentes modalités du manque phallique qui a à être subjectivé. De là, une nouvelle façon d’appréhender la notion d’ objet en psychanalyse. Ces derniers points devraient être développés plus amplement dans un prochain article.
Le chaînon manquant
Authors: Magnard Pierre
Published: May 2011

Résumé Passer directement de Nicolas de Cues à Leibniz, comme le fait Ernst Cassirer, introduit de l’un à l’autre une filiation abusive, génératrice de malentendus. Avec l’œuvre capitale de Charles de Bovelles, nous voulons restituer le chaînon manquant à une histoire des idées défigurée par de telles simplifications. L’œuvre du chanoine picard, laboratoire de concepts et d’opérateurs nouveaux, constitue l’indispensable transition d’un mentalisme sans « je » aux philosophies du sujet.
Infini mathématique et infini métaphysique : d'un bon usage de Leibniz pour lire Cues (... et d'autres)
Authors: Rabouin David
Published: May 2011

Résumé Il est courant d’inscrire Leibniz dans une lignée qui, passant par Nicolas de Cues et Giordano Bruno, aurait marqué le triomphe de l’infini actuel dans la pensée moderne, qu’elle soit scientifique ou métaphysique. Pourtant Leibniz n’acceptait nullement un tel infini en mathématiques et s’en est expliqué à diverses reprises de manière particulièrement claire. Dans cet article, je voudrais rappeler cette position élaborée dès le début du séjour parisien (Accessio ad Arithmeticam infinitorum, fin 1672) et montrer son effectivité dans l’élaboration du « fictionalisme » leibnizien en ce qui concerne les infiniment petits. Rappelant les différentes stratégies de comparaison entre les pensées de Leibniz et Nicolas de Cues, je voudrais indiquer la manière dont des textes récemment édités permettent aujourd’hui une meilleure appréciation de l’écart qui peut les séparer.
La puissance de l'infini et les paradoxes de la singularité. Infini et contraction chez Nicolas de Cues
Authors: Vengeon Frédéric
Published: May 2011

Résumé Nicolas de Cues élabore au xv e  siècle une métaphysique de la singularité à partir de l’infinité du Principe et de son expression dans le fini. Cependant ce processus de singularisation universel ne va pas sans soulever des difficultés. Comment la singularité de la créature peut-elle s’ouvrir à l’infini ? Comment les créatures singulières peuvent-elles former un monde commun et se rapporter à leur Principe sans perdre leur distinction ?
Moments of the Rank of Elliptic Curves
Authors: Miller Steven J. , Wong Siman
Published: May 2011

Fix an elliptic curve E/Qand assume the Riemann Hypothesis for the L-function L(ED, s) for every quadratic twist ED of E by D ϵ Z. We combine Weil's explicit formula with techniques of Heath-Brown to derive an asymptotic upper bound for the weighted moments of the analytic rank of ED. We derive from this an upper bound for the density of low-lying zeros of L(ED, s) that is compatible with the randommatrixmodels of Katz and Sarnak. We also show that for any unbounded increasing function f on R, the analytic rank and (assuming in addition the Birch and Swinnerton-Dyer conjecture) the number of integral points of ED are less than f (D) for almost all D.
Casselman’s Basis of Iwahori Vectors and the Bruhat Order
Authors: Bump Daniel , Nakasuji Maki
Published: May 2011

W. Casselman defined a basis fu of Iwahori fixed vectors of a spherical representation of a split semisimple p-adic group G over a nonarchimedean local field F by the condition that it be dual to the intertwining operators, indexed by elements u of the Weyl group W. On the other hand, there is a natural basis , and one seeks to find the transition matrices between the two bases. Thus, let and . Using the Iwahori–Hecke algebra we prove that if a combinatorial condition is satisfied, then , where z are the Langlands parameters for the representation and α runs through the set S(u, v) of positive coroots (the dual root systemof G) such that with rα the reflection corresponding to α. The condition is conjecturally always satisfied if G is simply-laced and the Kazhdan–Lusztig polynomial Pw0v,w0u = 1 with w0 the long Weyl group element. There is a similar formula for conjecturally satisfied if Pu,v = 1. This leads to various combinatorial conjectures.
Coherence of long-term stratospheric ozone vertical distribution time series used for the study of ozone recovery at a northern mid-latitude station
Authors: Nair P. J. , Godin-Beekmann S. , Pazmiño A. , Hauchecorne A. , Ancellet G. , Petropavlovskikh I. , Flynn L. E. , Froidevaux L.
Published: May 2011

Abstract. The coherence of stratospheric ozone time series retrieved from various observational records is investigated at Haute-Provence Observatory (OHP–43.93° N, 5.71° E). The analysis is accomplished through the intercomparison of collocated ozone measurements of Light Detection and Ranging (lidar) with Solar Backscatter UltraViolet(/2) (SBUV(/2)), Stratospheric Aerosol and Gas Experiment II (SAGE~II), Halogen Occultation Experiment (HALOE), Microwave Limb Sounder (MLS) on Upper Atmosphere Research Satellite (UARS) and Aura and Global Ozone Monitoring by Occultation of Stars (GOMOS) satellite observations as well as with in situ ozonesondes and ground-based Umkehr measurements performed at OHP. A detailed statistical study of the relative differences of ozone observations over the whole stratosphere is performed to detect any specific drift in the data. On average, all instruments show their best agreement with lidar at 20–40 km, where deviations are within ±5 %. Discrepancies are somewhat higher below 20 and above 40 km. The agreement with SAGE II data is remarkable since average differences are within ±1 % at 17–41 km. In contrast, Umkehr data underestimate systematically the lidar measurements in the whole stratosphere with a near zero bias at 16–8 hPa (~30 km). Drifts are estimated using simple linear regression for the data sets analysed in this study, from the monthly averaged difference time series. The derived values are less than ±0.5 % yr−1 in the 20–40 km altitude range and most drifts are not significant at the 2σ level. We also discuss the possibilities of extending the SAGE II and HALOE data with the GOMOS and Aura MLS data in consideration with relative offsets and drifts since the combination of such data sets are likely to be used for the study of stratospheric ozone recovery in the future.
Studies of ionospheric F-region response in the Latin American sector during the geomagnetic storm of 21–22 January 2005
Authors: Sahai Y. , Fagundes P. R. , de Jesus R. , de Abreu A. J. , Crowley G. , Kikuchi T. , Huang C.-S. , Pillat V. G. , Guarnieri F. L. , Abalde J. R. , Bittencourt J. A.
Published: May 2011

Abstract. In the present investigation, we have studied the response of the ionospheric F-region in the Latin American sector during the intense geomagnetic storm of 21–22 January 2005. This geomagnetic storm has been considered "anomalous" (minimum Dst reached −105 nT at 07:00 UT on 22 January) because the main storm phase occurred during the northward excursion of the Bz component of interplanetary magnetic fields (IMFs). The monthly mean F10.7 solar flux for the month of January 2005 was 99.0 sfu. The F-region parameters observed by ionosondes at Ramey (RAM; 18.5° N, 67.1° W), Puerto Rico, Jicamarca (JIC; 12.0° S, 76.8° W), Peru, Manaus (MAN; 2.9° S, 60.0° W), and São José dos Campos (SJC; 23.2° S, 45.9° W), Brazil, during 21–22 January (geomagnetically disturbed) and 25 January (geomagnetically quiet) have been analyzed. Both JIC and MAN, the equatorial stations, show unusually rapid uplifting of the F-region peak heights (hpF2/hmF2) and a decrease in the NmF2 coincident with the time of storm sudden commencement (SSC). The observed variations in the F-region ionospheric parameters are compared with the TIMEGCM model run for 21–22 January and the model results show both similarities and differences from the observed results. Average GPS-TEC (21, 22 and 25 January) and phase fluctuations (21, 22, 25, 26 January) observed at Belem (BELE; 1.5° S, 48.5° W), Brasilia (BRAZ; 15.9° S, 47.9° W), Presidente Prudente (UEPP; 22.3° S, 51.4° W), and Porto Alegre (POAL; 30.1° S, 51.1° W), Brazil, are also presented. These GPS stations belong to the RBMC/IBGE network of Brazil. A few hours after the onset of the storm, large enhancements in the VTEC and NmF2 between about 20:00 and 24:00 UT on 21 January were observed at all the stations. However, the increase in VTEC was greatest at the near equatorial station (BELE) and enhancements in VTEC decreased with latitude. It should be pointed out that no phase fluctuations or spread-F were observed in the Latin American sector during the post-sunset pre-reversal time in the geomagnetic disturbance (21 January). The disturbance dynamo electric field possibly resulted in downward drift of the F-region plasma and inhibited the formation of spread-F.
Modeling biogeochemical processes in sediments from the Rhône River prodelta area (NW Mediterranean Sea)
Authors: Pastor L. , Cathalot C. , Deflandre B. , Viollier E. , Soetaert K. , Meysman F. J. R. , Ulses C. , Metzger E. , Rabouille C.
Published: May 2011

Abstract. In situ oxygen microprofiles, sediment organic carbon content, and pore-water concentrations of nitrate, ammonium, iron, manganese, and sulfides obtained in sediments from the Rhône River prodelta and its adjacent continental shelf were used to constrain a numerical diagenetic model. Results showed that (1) the organic matter from the Rhône River is composed of a fraction of fresh material associated to high first-order degradation rate constants (11–33 yr−1); (2) the burial efficiency (burial/input ratio) in the Rhône prodelta (within 3 km of the river outlet) can be up to 80 %, and decreases to ~20 % on the adjacent continental shelf 10–15 km further offshore; (3) there is a large contribution of anoxic processes to total mineralization in sediments near the river mouth, certainly due to large inputs of fresh organic material combined with high sedimentation rates; (4) diagenetic by-products originally produced during anoxic organic matter mineralization are almost entirely precipitated (>97 %) and buried in the sediment, which leads to (5) a low contribution of the re-oxidation of reduced products to total oxygen consumption. Consequently, total carbon mineralization rates as based on oxygen consumption rates and using Redfield stoichiometry can be largely underestimated in such River-dominated Ocean Margins (RiOMar) environments.
Preface Results of the open session on "Documentation and monitoring of landslides and debris flows" for mathematical modelling and design of mitigation measures, held at the EGU General Assembly 2009
Authors: Franzi L. , Giordan D. , Arattano M. , Allasia P. , Arai M.
Published: May 2011

Abstract. The papers that are here presented and summarised represent the recent scientific contributions of some authors coming from different countries and working in the fields of monitoring, modelling, mapping and design of mitigation measures against mass movements. The authors had the opportunity to present their recent advancements, discuss each other needs and set forth future research requirements during the 2009 EGU General Assembly, so that their scientific contributions can be considered the result of the debates and exchanges that were set among scientists and researchers, either personally or during the review phase since that date. In this resume, the scientific papers of the special issue are divided according to different thematic areas and summarised. The most innovative scientific approaches proposed in the special issue, regarding the monitoring methodologies, simulation techniques and laboratory equipment are described and summarised. The obtained results are very promising to keep on future research at a very satisfactory level.
Comparison of SeaWiFS and MODIS time series of inherent optical properties for the Adriatic Sea
Authors: Mélin F.
Published: May 2011

Abstract. Time series of inherent optical properties (IOPs) derived from SeaWiFS and MODIS are compared for the Adriatic Sea. The IOPs are outputs of the Quasi-Analytical Algorithm and include total absorption a, phytoplankton absorption aph, absorption associated with colored detrital material (CDM) acdm, and particle backscattering coefficient bbp. The average root-mean square difference Δ computed for log-transformed distributions decreases for $a$ from 0.084 at 412 nm to 0.052 at 490 nm, is higher for aph(443) (0.149) than for acdm(443) (0.071), and is approximately 0.165 for bbp at various wavelengths. The SeaWiFS a at 443 and 490 nm, aph at 443 nm and bbp are on average higher than the MODIS counterparts. Statistics show significant variations in space and time. There is an overall increasing gradient for Δ associated with the absorption terms from the open southern and central Adriatic to the northwest part of the basin, and a reversed gradient for the particulate backscattering coefficient. For time series analysis, only a(412) and acdm(443) currently present an unbiased continuity bridging the SeaWiFS and MODIS periods for the Adriatic Sea.
ELECTRON BEAM MODIFICATION OF CHLORINATED POLYETHYLENE
Authors: Mandal K. , Mongal N. R. , Singha Nikhil K.
Published: May 2011

Modification of polymers by electron beam (EB) radiation is a potential method for the development of new polymers and composites. This investigation reports the modification of chlorinated polyethylene (CPE) using electron beam radiation. In this case, the modification was carried out by using different dose of EB radiation. Different sensitizers at different concentrations were used to minimize the dose of EB radiation for effective crosslinking of the polymer. The optimum level of the radiation dose and the sensitizer concentration was determined by studying the gel content, mechanical, and electrical properties of the modified CPE. The percentage of the loss of chlorine during electron beam modification was calculated by monitoring the chlorine content in the modified CPE. The modified polymers were characterized by using Fourier transform infrared, thermogravimetric analysis, and differential scanning calorimetry analysis. Electrical properties of the modified CPE were also studied.
CHARACTERIZING THE TIME DEPENDENCE OF FILLED EPDM
Authors: Koprowski-Theiss N. , Johlitz M. , Diebels S.
Published: May 2011

The mechanical properties of a carbon black filled rubber are investigated. The main focus lays on the theoretical modeling of the basic elasticity and the viscoelastic behavior. Therefore, uniaxial tension tests at different feedrates are performed. The occurring Mullins effect can be neglected due to adequate pretreatment of the specimens. Healing effects are also verified and investigated in the examined material. The constitutive model for the basic elasticity is based on the Yeoh model, while the theory of finite viscoelasticity with an intermediate configuration is used to describe the rate dependent behavior. The healing effects are constituted with large relaxation times and not with an additional structural parameter. As the material has a strong nonlinear behavior with respect to the deformation rate, nonlinearity in the relaxation time with respect to this behavior is introduced. The material parameters of the model are estimated using a stochastic identification algorithm.
UNRAVELING THE MYSTERY OF NATURAL RUBBER BIOSYNTHESIS. PART I: INVESTIGATION OF THE COMPOSITION AND GROWTH OF IN VITRO NATURAL RUBBER USING HIGH RESOLUTION SIZE EXCLUSION CHROMATOGRAPHY
Authors: Chiang Chengching K. , Xie Wenshuang , McMahan Colleen , Puskas Judit E.
Published: May 2011

Monitoring the growth of in vitro natural rubber was accomplished by high resolution size exclusion chromatography, SEC. Washed rubber particles isolated from H. brasiliensis latex, containing the rubber transferase enzyme, were used to catalyze the polymerization of synthetic isopentenyl pyrophosphate monomer in the presence of farnesyl pyrophosphate initiator. The high-resolution SEC was able to detect the formation of new rubber. Changes in the low molecular weight fraction were also detected. Gravimetric analysis revealed ∼30% mass gain after the in vitro synthesis. The overall gel content was found to be reduced, which further supported the formation of new rubber. This is the first report that utilizes high-resolution SEC to monitor the in vitro NR growth without the use of radiolabeling.
FACTORS INFLUENCING REINFORCEMENT OF NR AND EPDM RUBBERS WITH SHORT ARAMID FIBERS
Authors: Shirazi M. , Noordermeer J. W. M.
Published: May 2011

Among short fiber reinforced composites, those with rubbery matrices have gained great importance due to the advantages they have in processing and low cost, coupled with high strength. These composites combine the elastic behavior of rubbers with strength and stiffness of fibers. Aramid fibers have been chosen because of their significantly higher modulus and strength, compared to other commercial fibers. Compounds based on NR and EPDM are prepared. Short aramid fibers with different kinds of surface treatments, standard finish, and resorcinol formaldehyde latex (RFL)-coating result in different rubber–fiber interfaces. The reinforcing effect of these short aramid fibers is characterized by mechanical and viscoelastic experiments, and by studying the fracture surfaces with electron microscopy techniques. Related to the fiber coating and rubber curing system, sulfur- or peroxide-based, different reinforcement mechanisms are observed, where the combination of peroxide-cured EPDM with RFL-treated fibers is the only case showing clear signs of chemical adhesion. In all other combinations there are only indications of mechanical interactions of the fibers with the rubber matrices, due to bending/buckling of fibers, dog-bone shaped fiber ends, and surface roughness due to the RFL-coating.
Commitment as a Mediator Variable Used to Predict Future Service Consumption Intentions: An Empirical Approach to Consumers of Performing Arts in Spain
Authors:   Departamento de Economía y Administración de Empresas, Área de Comercialización e Investigación de Mercados. Facultad de Ciencias Económicas y Empresariales. Universidad de Málaga. Campus El Ejido nº 6, 29071 Málaga. E-mail: mqg@uma.es, Quero Gervilla María José , Ventura Fernández Rafael ,   Departamento de Economía y Administración de Empresas, Área de Comercialización e Investigación de Mercados. Facultad de Ciencias Económicas y Empresariales. Universidad de Málaga. Campus El Ejido nº 6, 29071 Málaga. E-mail: rventura@uma.es
Published: May 2011

The aim of this research project is to gain some insight into the relationships between the following variables: Satisfaction, Commitment, Trust, and Future Purchasing Intentions. In order to achieve this aim, a Model for the Management of Service Sector Customer Relations is proposed, and this Model shows that the most important variable for achieving positive results in terms of future attendance intentions amongst consumers is Commitment. This empirical work focuses on the services sector, specifically on the field of performing arts. In order to carry out the analyses, 1005 performing art consumers were interviewed at the entrances or exits to shows. 150 public and private theatres from throughout the whole of Spain have collaborated in the project.
Causes and consequences of consumer dissatisfaction with external attributions
Authors:   Universidad de Valencia. Departamento de Comercialización e Investigación de Mercados, Facultad de Economía. Av. Dels Tarongers, s/n, Edificio Departamental Oriental, 46022 Valencia. Correo electrónico: beatriz.moliner@uv.es, Moliner Velázquez Beatriz , Fuentes Blasco María ,   Universidad Pablo de Olavide. Departamento de Dirección de Empresas, Facultad de Ciencias Empresariales. Ctra. de Utrera, km. 1, 41013 Sevilla. Correo electrónico: mfuebla@upo.es
Published: May 2011

This paper deals with the process of how consumer dissatisfaction is formed, both from a cognitive and an affective perspective, and also with how it translates into complaint behavior intentions. Our main objective is, on the one hand, to gain an insight into the effect that the disconfirmation of expectations has on dissatisfaction judgments, not only directly, but also indirectly through negative affects. On the other hand, we intend to analyze the influence these judgments exert on complaint behavior intentions, which can develop into complaint responses, third party responses, or private responses. From a sample of customers who have experienced an unsatisfactory situation with a restaurant and show different external attribution level, we have put forward a causal model to study the causal relationships. The results confirm a direct effect of disconfirmation on dissatisfaction and on affects, a direct effect of that dissatisfaction on complaint behaviour intentions and there are not significant differences according to external attribution level. The findings suggest management implications and future research.
VA/Department of Defense Clinical Practice Guideline for PTSD and ASD
Authors: Schnurr Paula P. , Sall James A. , Riggs David
Published: May 2024

This Viewpoint discusses the Department of Veterans Affairs and Department of Defense clinical practice guideline for posttraumatic stress disorder and acute stress disorder were developed.
Enhanced Antimicrobial Activity of Laser‐Induced Graphene‐Wrapped Trimetal Organic Framework Nanocomposites
Authors: Sharma Chetan Prakash , Modi Akshay , Jose Ajesh , Rostovsky Irina , Sal‐Man Neta , Be'er Avraham , Kasher Roni , Arnusch Christopher J.
Published: May 2024

Crystalline and porous metal–organic frameworks (MOFs) are potential candidates for different antibacterial, photocatalytic, and adsorption applications. Moreover, multiprincipal element nanoparticles are effective against multidrug‐resistant bacteria, and combining metals with carbon nanomaterials can enhance activity. Herein, a Tri‐MOF comprised of iron, zinc, cobalt and 2‐methyl imidazole is grown together with laser‐induced graphene (LIG) powder. Electron microscopy imaging shows the successful preparation and the crystalline nature of the LIG/Tri‐MOF composite. Fourier‐transform infrared and X‐Ray photoelectron spectroscopy confirm a noncovalent mixture of LIG and Tri‐MOF. Compared with the negligible activity of LIG alone, low doses (0.91–4.54 mg mL−1) of the prepared LIG/Tri‐MOF composite show excellent antibacterial activity (≥95% bacterial removal) and a MIC of 0.6 mg mL−1 for Gram‐negative bacteria, via the gradual leaching of metal ions and organic linker from the material enhanced by bacterial aggregation near the LIG/Tri‐MOF. Compared to a mixture of separately synthesized Tri‐MOF and LIG, the LIG/Tri‐MOF composite shows improved antibacterial effects. All materials show cytotoxicity for L929 mouse cell lines, the solids showing a disrupting effect on cells grown in vitro. Performance‐enhancing combinations of various materials leading to synergistic or additive antimicrobial effects are essential strategies for minimizing the possible emergence of antibiotic‐resistant strains.
“Stiff‐Elastic” Binary Synergistic Fibrous Tape with Thermal‐Triggered Shrinkable and Shape Recoverable Performances for Wound Closure
Authors: Dong Yuping , Zhang Xiaohua , Chen Yuxin , Yu Jianyong , Li Xiaoran , Ding Bin
Published: May 2024

The emerging mechanically active wound dressing has been perceived as one of the most effective strategies to accelerate wound closure in a non‐invasive manner. However, the development of wound dressing with body temperature‐stimulated shrinkage behavior and superior mechanical capability is still a severe challenge. Here, a thermal‐shrinkable, stretchable, and tough fibrous tape is developed via the construction of “stiff‐elastic” binary component, as well as manipulation of the fiber stretching and phase separation. The resultant polyurethane (PU)/polyvinyl butyral (PVB) fibrous membrane (FM) shows a rapid and considerable shrinkage of 70.0% after exposure at 37 °C for 12 h. The shrunk PU/PVB FMs exhibit excellent mechanical performance including high elongation of 364.4%, large toughness of 26.6 MJ m−3 and rapid thermal‐recoverable capability with 80.4% and 71.8% restoration of stress and dissipated energy respectively. The in vivo study in rat full‐thickness skin model with 2 cm‐diameter circular wounds demonstrates that the thermal‐shrinkable PU/PVB FMs can enhance wound contraction and healing. Furthermore, the ex vivo rabbit organ model indicates the possibility of thermal‐shrinkable PU/PVB FMs in defect contraction of diverse tissues. This work may offer a promising way in the development of body temperature‐triggered mechanically active fibrous dressings for defects repair.