bluuebunny/crossref_metadata_2025 huggingface dataset:
Ab initio study of adsorption and diffusion of lithium on transition metal dichalcogenide monolayers
Authors: Sun Xiaoli , Wang Zhiguo
Published: December 2017

Using first principles calculations, we studied the stability and electronic properties of transition metal dichalcogenide monolayers of the type MX2 (M = Ti, Zr, Hf, V, Nb, Ta, Mo, Cr, W; X= S, Se, Te). The adsorption and diffusion of lithium on the stable MX2 phase was also investigated for potential application as an anode for lithium ion batteries. Some of these compounds were found to be stable in the 2H phase and some are in the 1T or 1T' phase, but only a few of them were stable in both 2H/1T or 2H/1T' phases. The results show that lithium is energetically favourable for adsorption on MX2 monolayers, which can be semiconductors with a narrow bandgap and metallic materials. Lithium cannot be adsorbed onto 2H-WS2 and 2H-WSe2, which have large bandgaps of 1.66 and 1.96 eV, respectively. The diffusion energy barrier is in the range between 0.17 and 0.64 eV for lithium on MX2 monolayers, while for most of the materials it was found to be around 0.25 eV. Therefore, this work illustrated that most of the MX2 monolayers explored in this work can be used as promising anode materials for lithium ion batteries.
On the absence of the Green-tailed Trainbearer Lesbia nuna (Trochilidae) from Venezuela: an analysis based on environmental niche modelling
Authors: Ramoni Perazzi Paolo , Schuchmann Karl , Ablan Bortone Magdiel , Soto Werschitz Alejandra
Published: December 2017

Lesbia nuna, a hummingbird distributed in the tropical Andes, has been included in Venezuela's bird list on the basis of a specimen collected in 1873 at Sierra Nevada, Mérida and deposited in the Natural History Museum, London, with no further records for this country since then. This record, largely considered as valid by most authors, has been questioned by others, although without formal analyses.

The potential habitat range of the Green-Tailed Trainbearer, Lesbia nuna gouldii (Trochilidae), in the northern Andes from Ecuador to Venezuela was modelled, using maximum entropy niche modelling, environmental covariates and records from locations across the Colombian Andes. The predicted suitable habitat range corresponded well to the known range of the subspecies L. n. gouldii in Colombia and clearly excluded Sierra Nevada. Therefore, these analyses suggest that this species should be removed from the Venezuelan bird list.
De Nuremberg à Daech : entre la survie et l’obéissance
Authors: Michielsen Bernard
Published: December 2017

Les tribunaux internationaux chargés de juger les crimes de guerres ou les enquêtes ouvertes à propos d’exactions commises en temps de guerre, apportent un éclairage particulier sur les motivations qui ont animé les accusés. Une analyse, même non exhaustive, de certains récits de combattants dans des conflits du 20 e  siècle sont susceptibles de nous apporter quelques clés de compréhension des origines et de la croissance des fanatismes. Force est de constater que la plupart des justifications données par les auteurs de ces crimes se construisent invariablement sur trois concepts : une idéologie fondée sur la survie d’un système culturel, la croyance souvent erronée d’un danger immédiat, une soumission ou une obéissance à une autorité reconnue comme légitime. Dans cet article nous tenterons d’illustrer cette analyse en examinant les récits des criminels de guerre nazis durant le procès de Nuremberg mais également des témoignages d’officiers de l’armée française lors du conflit algérien.
Mise en perspective historique, politique et théologique de la radicalisation islamique
Authors: Ralet Olivier
Published: December 2017

Cet article fait le lien entre certaines formes de psychologie adolescente, notamment déculturées par un héritage morcelé (révolte contre les parents, idéal d’héroïsme, identité « entre deux chaises »...) et certaines sources anciennes et modernes des formes radicales d’islams (abrogation des versets mecquois pacifiques par les versets médinois guerriers, lectures littérales des textes, eschatologie apocalyptique..., normativité wahhabite-salafiste moderne, hégémonisme politique des Frères musulmans...). Il situe dans l’histoire le double éthos islamiste de fascination envieuse à l’égard de la puissance matérielle de la modernité occidentale et de mépris dégouté à l’égard de ses mœurs, ainsi que le désir de revanche face à la domination occidentale vécue comme humiliante. Il oppose les formes d’islams inscrites dans les cultures, généralement pacifiques, aux formes qui se veulent « pures », détachées des cultures, le plus souvent conquérantes. Il pointe l’escalade symétrique entre formes dominatrices de la modernité et suprématisme des islams radicaux. Il fraie des pistes de prévention, comme le renforcement de la fierté des islams locaux des grands-parents et de la civilisation islamique, l’alliance entre formes ouvertes d’islams et citoyennetés hospitalières, l’alliance avec les familles et approche trans-générationnelle, production commune du sens de vie dans la pluralité, l’amour et la joie.
Les dérives djihadistes de l’adolescent
Authors: Epstein Danièle
Published: December 2017

La dérive fanatique qui mène des jeunes au jihad est un des signes de la crise adolescente et un symptôme du malaise contemporain. Sur un terreau d’inespoir, ils rencontrent une fiction religieuse, qui fait barrage à leurs doutes et à leur angoisse et leur promet de devenir Tout, là où ils n’étaient Rien, élus là où ils étaient exclus. Entre mélancolie et mégalomanie, les causes psychologiques, sociologiques et politiques peuvent les mener au terrorisme comme un enjeu de vie qui les mène à la mort.
Entre « déformateurs de mémoire historique » et défenseurs d’un passé oublié : l’édition indépendante et l’histoire dans la Russie contemporaine
Authors: Ostromooukhova Bella
Published: December 2017

Dans la nébuleuse des petites maisons d’édition qui se revendiquent comme « indépendantes » au sein du champ éditorial russe, nombreuses sont celles qui proposent une vision du passé alternative à l’historiographie de célébration d’un passé glorieux que défendent les prescriptions des autorités politiques. L’article étudie plusieurs de ces initiatives : celles de maisons d’édition fondées au début des années 1990 par d’anciens dissidents soviétiques, Vozvrachtchenie [Le retour] et Novyi Hronograf [Le nouveau chronographe], celle d’un projet plus récent conduit par une génération postsoviétique de défenseurs du patrimoine historique urbain, Moskva, Kotoroi Net [Moscou qui n’est plus], et celle, enfin, d’Ad Marginem, une maison d’édition qui a connu au début des années 2000 une percée commerciale grâce à des succès à scandale. Le rapport complexe que les fondateurs de ces maisons d’édition entretiennent avec leur propre passé, les contraintes matérielles ou morales et les aléas de parcours qui perturbent leur politique éditoriale de petits éditeurs, influent sur la façon de construire une historiographie qui se distingue d’une vision héroïque du passé. L’approche de l’histoire qu’ils développent est également multiple et polymorphe, fruit de constructions parfois divergentes mais également du rapport à l’histoire complexe que chacun de ces éditeurs a élaboré dans son parcours biographique.
Un champ de bataille mémoriel : la guerre civile de 1917-1921 à Samara
Authors: Goloubinov Iaroslav
Published: December 2017

La société russe est aujourd’hui agitée par de multiples controverses liées à l’interprétation de différents événements historiques. La guerre de 1941-1945 et la période 1917-1920 suscitent même, en un sens, plus d’attention que les questions d’actualité. Ce phénomène se décline à différentes échelles géographiques. La construction et la défense de la mémoire du gouvernement antibolchevique de Samara pendant la guerre civile, allié aux légions tchécoslovaques, éclaire ce processus de commémoration collective du passé à l’échelle d’une région. L’analyse souligne que la société russe n’est pas encore parvenue à construire un langage commémoratif postsoviétique ; des événements vieux d’un siècle sont ainsi interprétés à travers des stéréotypes forgés par le discours soviétique sur la Seconde Guerre mondiale.
Des subjectivités homosexuelles dans une URSS multinationale
Authors: Clech Arthur
Published: December 2017

Cet article s’appuie sur l’analyse d’entretiens menés dans la Russie contemporaine avec des personnes qui ont vécu leur désir homosexuel durant la période soviétique tardive. Il cherche à montrer ce qu’il pouvait y avoir de commun dans ces parcours, sans qu’on puisse parler de communauté homosexuelle, et les voies suivies pour que leur subjectivité puisse s’affirmer. Ces discours s’articulent en des termes profondément soviétiques, encore perceptibles aujourd’hui, notamment à travers l’évocation des formes de sociabilité, de la diversité nationale de la population soviétique et de la diversité des circulations au sein de cet espace. Ils dessinent, ainsi, les formes d’une expérience homosexuelle soviétique partagée qui subsiste dans la Russie contemporaine.
Le corporatisme étudiant, matrice du mouvement écologiste russe (1960-2015)
Authors: Coumel Laurent
Published: December 2017

Cet article interroge l’histoire des organisations étudiantes de « protection de la nature » en URSS et dans la Russie contemporaine après 1991. Combinant une recherche dans les fonds d’archives centraux et régionaux avec des entretiens réalisés lors d’un séjour de terrain et des sources publiées, dont certaines sont issues des réseaux sociaux sur Internet, il revient sur les bases institutionnelles, le recrutement et les modes opératoires de cette forme méconnue d’activisme environnemental née à l’époque soviétique. Mêlant un fort élitisme social, une approche vigilantiste et une aspiration corporatiste à l’autonomie, celle-ci contribue à l’émergence d’un mouvement vert spécifique dans les années du moment démocratique en Russie (1987-1993) avant de s’effacer progressivement. Elle connaît un renouveau certain sous le régime de Vladimir Poutine, entre nostalgie pour le soviétisme tardif et reprise d’une expertise contestataire aux prises avec l’autoritarisme.
Légitimation et disqualification par l’histoire dans les manifestations de rue en Russie (2011-2016)
Authors: Arkhipova Alexandra , Doronin Dmitry , Iougaï Elena , Kirziouk Anna , Radtchenko Darya , Titkov Alexeï , Volkova Anna , Guichard Benjamin
Published: December 2017

L’article s’appuie sur un corpus de plus de 6 000 slogans et de symboles comportant des références historiques, collectés lors de manifestations de rue entre 2011 et 2016 en Russie dans le cadre de l’enquête collective du groupe de recherche « Analyse du folklore contemporain ». L’analyse quantitative de cet ensemble permet de dégager les grands traits de la représentation du passé dans les différents types de manifestations, qu’il s’agisse des organisations soutenant le régime, des actions politiques de l’opposition, des manifestations défendant des revendications sociales ou des marches organisées par les différentes forces partisanes. Il est ainsi possible de comparer l’intérêt porté à différentes périodes de l’histoire russe et d’analyser les formes d’instrumentalisation des références historiques qui servent à nourrir les différentes lectures politiques des événements contemporains, dominés par l’annexion de la Crimée, le conflit avec l’Ukraine et la répression des mouvements de contestation du pouvoir de Vladimir Poutine.
Une manifestation sans manifeste ?
Authors: Le Blanc Guillaume
Published: December 2017

Résumé L'article entend revenir sur les processus d'inaudibilité et d'invisibilité qui affectent les plus précaires. Dans ce contexte, il propose une nouvelle interprétation du Bartleby de Melville en s'employant à montrer que sa formule « I would prefer not to » peut être comprise comme le dernier stade d'une parole qui renonce à elle-même plutôt que comme la formulation d'une résistance. Généralisant ce cas littéraire, il propose une description du processus d'invisibilisation sociale qui caractérise les vies précaires rendues inaudibles du fait de leur précarité.
Être présent au monde
Authors: Vermeren Pauline
Published: December 2017

Résumé Cet article propose d'analyser la « subjectivation politique noire » en considérant les « mouvements nègres » de l'entre-deux-guerres. Les acteurs en question, identifiés à une communauté noire, se sont inscrits dans l'espace politique par la prise de parole à travers une occupation inédite des lieux, créant ainsi un espace de visibilité. La difficulté à formuler le problème racial en France amène à considérer la nécessité d'un changement de mode de pensée afin de comprendre en quoi l'usage anthropologique, politique et économique du corps de ces individus perçus en tant que Noirs, et notamment les enjeux sociopolitiques liés au corps de ceux qui ont été nommés « Nègres », a tenté d'occulter toute forme de subjectivité et de rendre inaudible leur voix, leur parole et donc leur présence au monde. Par la création de cette scène politique, ou encore de cette scène raciale, deux problématiques peuvent être explorées : le silence sur la race et l'embarras de l'identité.
La densité fait-elle la mixité ?
Authors: Rousseau Max
Published: December 2017

Résumé Par le biais d'une analyse des politiques de densification mises en œuvre au sein de la deuxième agglomération française (Lyon), l'objectif de cet article est de comprendre le semi-échec de la législation nationale française visant à substituer la ville dense à l'étalement urbain. En effet, si la densification des banlieues lyonnaises semble bien engagée depuis une décennie, l'un des objectifs de la loi Solidarité et renouvellement urbain était de doubler la mutation paysagère d'une mutation sociale ; la mixité sociale induite par la densification étant supposée briser les tendances ségrégatives constatées dans les grandes agglomérations françaises depuis l'échec de la première vague de suburbanisation post seconde guerre mondiale. Or, les politiques de densification mises en œuvre dans l'agglomération lyonnaise ne visent guère à infléchir la ségrégation historique entre la banlieue ouest, résidentielle et huppée, et la banlieue est, industrielle et populaire. Au contraire, le compromis politique noué entre les maires de l'ouest lyonnais et la communauté urbaine permet de transformer la densification en un vecteur de renforcement de la spécialisation résidentielle de l'Ouest. De même, celui noué entre les maires de l'Est et la communauté urbaine permet de transformer la densification en un vecteur de renforcement de la spécialisation de l'Est, tourné vers le développement économique. Cet article montre que la politisation de la densification ainsi que les règles du jeu intercommunal limitent dès lors les possibilités de répartir les fonctions et les populations à l'échelle de la métropole, en dépit d'un changement perceptible de la forme urbaine survenu au cours de la dernière décennie.
High frequency of microdeletion in TTY2 gene family in peripheral blood leukocytes of non-obstructive azoospermia patients
Authors: Zonozi Farideh , Mozdarani Hossein , Salimi Mahdieh , Mozdarani Sohail , Fallahi Parvin , Mozdarani Sahar , Heidari Zahra
Published: December 2017

About 10–15% of non-obstructive azoospermia (NOA) patients show AZFc microdeletion in their blood leukocytes. However, if AZF genes were involved in impaired spermatogenesis, a higher frequency of chromosomal microdeletions was expected. In this study the frequency of AZFc microdeletion was compared with TTY2 gene family, i.e., TTY2A2A and TTY2A12A in blood leukocytes of NOA patients and normal fertile control. In the present study 30 normal fertile individuals with mean age of 35.0 ± 6.0 and 30 NOA patients with mean age of 34.0 ± 7.0 were screened for microdeletion of TTY2L2A and TTY2L12A at Yq11 and Yp11 respectively and sequence-tagged site (STS) markers for AZFc gene using multiplex PCR technique. At the first step karyotyping was done for all subjects using standard G-banding technique to identify patients with normal karyotype as well as non-affected normal controls for molecular analysis.

Results showed no AZFc microdeletion in normal and NAO patients whereas one TTY2L2A microdeletion in normal control (3.3%) and 4 in NOA (13.3%) was observed (p < 0.05). However our data indicated that 6 of 30 NOA patients (20%) showed TTY2L12A microdeletion whereas there was no observed microdeletion in normal control (p < 0.01).

Results indicate that the studied genes might be involved in impaired spermatogenesis more effective than the routinely screened AZF genes in infertile men. Therefore, screening these genes along with AZF genes might be valuable for infertile patients. The reason why these genes are deleted from Y chromosome is not known but might be associated with genomic instability induced by environmental physico-chemical genotoxic agents.
Le château de Mugnano (Italie Centrale) au xiie siècle : révolution politique, évolution économique, stabilité naturelle
Authors: Dmitriev Nikita
Published: December 2017

Le château de Mugnano, sur une colline du littoral du Tibre (province de Viterbe, région du Latium, Italie) est un habitat de la Tuscie romaine, région de l'État pontifical relativement pauvre en documentations, qui, à cause de son éloignement de Rome, du point de vue de l'organisation de la société, occupait la position intermédiaire entre le Latium, hautement féodalisé, et l'Ombrie, hors la juridiction temporaire pontificale au Haut Moyen-Âge, où les rapports féodo-vassaliques, avant la fin du xiie siècle, étaient extrêmement rares. Au cœur de l'évolution de cette région au xiie siècle se sont placées l'augmentation progressive des charges paysannes, la dépersonnalisation des liens entre eux et leur seigneur, ainsi que la scripturalisation du droit foncier, autrefois oral, au profit des seigneurs, dont la finalité était la dépossession des paysans. En s'appuyant sur les chartes privées du xe-xiiie siècles provenant de Mugnano, l'article s'efforce de reconstruire ces trois grandes lignes d’évolution : économique, sociale et politique.
Révolution de l’architecture domestique du Proche-Orient protobyzantin (iv-viie siècle) : culture de l’élite au détriment de la culture classique ?
Authors: Dumas Marius
Published: December 2017

L’habitat urbain du Proche-Orient protobyzantin se distingue dans le domaine archéologique par une architecture domestique principalement monumentale. Le luxe et le caractère ostentatoire affichés des résidences, ont amené les archéologues à les assigner à une élite urbaine. L’état de conservation parfois surprenant des vestiges, a permis de relever de nombreuses caractéristiques susceptibles de qualifier chacune des époques, notamment lorsqu’il était possible de dresser une chronologie suffisamment précise pour isoler certaines transformations, au gré des réfections et des travaux qui se sont déroulés tout au long de la longue existence de ces demeures.Pendant la période protobyzantine, l’architecture domestique évolue, rompant avec son organisation initiale. En effet, les puissants n’hésitèrent pas à se confronter aux anciens plans de leurs demeures et à les repenser afin qu’ils correspondent davantage à de nouveaux besoins, stimulés par le fait d’amener dans la sphère privée des prérogatives initialement attachées à la sphère publique. Les transformations ont été jugées, tantôt en des termes de continuité ou d’évolution : tel le maintien de certaines composantes antiques au sein des phases les plus tardives ; tantôt en des termes plus dépréciatifs : synonymes de régression. En peu de mots de causer l’aliénation de l’héritage gréco-romain, quitte à négliger les éléments constitutifs de l’époque protobyzantine, qui fut même qualifiée de période de transition entre l’Antiquité et le Moyen-Age. Toutefois, il semble qu’aucun archéologue n’ait encore envisagé ces transformations en termes de révolution. Révolution au sens que les profondes mutations appartenant à l’Antiquité tardive imposaient de s’affranchir du carcan traditionnel imposé par la culture hellénistique, gréco-romaine et même indigène. Là, semble se terrer quelques innovations propres à cette période, terreau d’une véritable révolution : révolution des lieux du pouvoir, de son expression, tant dans son architecture que dans son exercice, à l’instar du développement des salles triconques dans les maisons attribuées aux « élites ».
Impacto da reconfiguração dos passivos contingentes no desempenho financeiro: Uma análise nas empresas brasileiras do setor de energia elétrica
Authors: Carmo Carlos Henrique Silva do , Ribeiro Alex Mussoi , Mesquita Krislâne Maria Pereira
Published: December 2017

O objetivo desta pesquisa é verificar qual o efeito da reconfiguração dos Passivos Contingentes no desempenho econômico-financeiro das empresas brasileiras do setor de energia elétrica nos anos de 2013 a 2015. A amostra foi composta por 53 empresas e foram analisados 153 demonstrativos financeiros. Como modelo de reconfiguração dos passivos contingentes para provisão foi utilizada a abordagem por níveis percentuais desenvolvida por Rosa (2014). A autora classifica a reversão em 5 cenários: Otimista (20%), Parcialmente Otimista (40%), Moderado (60%), Parcialmente Pessimista (80%) e Pessimista(100%). Para representar o desempenho econômico e financeiro foram selecionados três indicadores: Liquidez Geral (LG), Endividamento Geral (EG)e Retorno do Ativo (ROA). Os resultados obtidos revelam que, para os cenários mais pessimistas, existe uma diferença significativa entre os indicadores calculados com os dados originais em comparação com os mesmos calculados com os cenários reclassificados. A estatística D de Cohen (1988) apontou que, além de estatisticamente significativa, nos piores cenários, o tamanho do efeito também foi elevado, principalmente para o ROA e para o Endividamento. Na Liquidez as diferenças não foram tão expressivas. Os achados desta pesquisa servem de alerta aos usuários das demonstrações financeiras ao realizar suas análises acerca do desempenho econômico-financeiro das empresas, devendo os mesmos levarem em consideração os impactos das diferentes interpretações dos indivíduos envolvidos nas decisões acerca das probabilidades de perda das Provisões e dos Passivos Contingentes.
Fatores explicativos de Work-Life Balance e a gestão de tempo conduzindo ao bem estar na visão de contadores paranaenses
Authors: Altoé Stella Maris Lima , Voese Simone Bernardes
Published: December 2017

Recentemente, work-life balance tem sido foco de debates que visam abordar sobre a integração entre os diferentes domínios trabalho e família. As discussões procuram reduzir os conflitos de papéis inerentes a estas esferas. Em determinadas profissões, decorrente do trabalho intenso, observa-se a intensificação dos conflitos de papéis. Isto posto, constata-se que a profissão contábil apresenta demandas específicas em determinados períodos, logo, o profissional fica sobrecarregado de tarefas e necessita gerir adequadamente seu tempo. Dessa forma, o estudo objetiva identificar quais são os fatores que explicam a percepção de contadores paranaenses quanto ao seu work-life balance e a gestão de tempo. Por meio de survey online, a partir do instrumento de pesquisa adaptado do estudo de Wong e Ko (2009), 267 contadores registrados no estado do Paraná responderam ao questionário. Para analisar os dados, utilizou-se estatística descritiva e análise fatorial. A partir da técnica de análise fatorial, foram três os fatores identificados como explicativos de work-life balance: (1) apoio no trabalho; (2) comprometimento com o trabalho; e (3) comprometimento com a família e aspectos pessoais. Além dos três fatores de work-life balance identificados, considerou-se a gestão de tempo. Os resultados da presente pesquisa estão alinhados aos achados de Wong e Ko (2009). Como contribuição científica, este estudo possibilita discussões relevantes sobre aspectos relacionados a qualidade de vida e a performance dos profissionais contábeis.
Lucanus gradivus n. sp. from Vietnam, with new records of L. fujitai Katsura and Giang from Vietnam and Laos (Coleoptera, Lucanidae)
Authors: Sato Jin , Zilioli Michele
Published: December 2017

Lucanus gradivus n.sp. from Vietnam is described. It belongs to the large of L. fortunei Saunders, 1854 species group and is closely related to L. fujitai Katsura and Giang 2002. Lucanus gradivus differs mainly through the stronger and differently denticulated mandibles, larger and more pronounced posterolateral corners of the cephalic lobes, and the aedeagus, with longer flagellum, shorter and thinner median lobe, and longer apically curved parameres.
Therapeutic fasting as a potential effective treatment for type 2 diabetes: A 4-month case study
Authors: Ku Michael , Ramos Megan J. , Fung Jason
Published: December 2017

Lifestyle therapy is an integral part of type 2 diabetes (T2D) management, but there remains no consensus on an optimal diet. The objective of this study is to evaluate the efficacy of therapeutic fasting as a treatment for T2D. This case follows a male T2D patient treated at the Intensive Dietary Management Clinic in Scarborough, Ontario, over a 4-month period. The patient’s initial fasting regimen consisted of a 24-h fast, three times a week. Over the course of treatment, the patient gradually extended his fasting period, eventually fasting for 42 h, two to three times a week. By the end of treatment, the patient’s weight was reduced by 17.8% and his waist circumference was reduced by 11.0%. In addition, the patient’s glycated haemoglobin levels decreased from 7.7% to 7.2%, and he was able to completely discontinue his insulin treatment, despite over a decade of insulin usage. The patient did not find it difficult to adhere to the fasting schedule and did not experience any hypoglycaemic episodes or other significant adverse effects. These observations suggest that therapeutic fasting may be a viable treatment option for T2D patients.
A Note on Uniformly Bounded Cocycles into Finite Von Neumann Algebras
Authors: Boutonnet Remi , Roydor Jean
Published: December 2017

We give a short proof of a result of T. Bates and T. Giordano stating that any uniformly bounded Borel cocycle into a finite von Neumann algebra is cohomologous to a unitary cocycle. We also point out a separability issue in their proof. Our approach is based on the existence of a non-positive curvature metric on the positive cone of a finite von Neumann algebra.
Koszul pairs and applications
Authors: Jara Pascual , López Peña Javier , Ştefan Dragoş
Published: December 2017

Let

R

be a semisimple ring. A pair

(A,C)

is called almost-Koszul if

A

is a connected graded

R

-ring and

C

is a compatible connected graded

R

-coring. To an almost-Koszul pair one associates three chain complexes and three cochain complexes such that one of them is exact if and only if the others are so. In this situation

(A,C)

is said to be Koszul. One proves that a connected

R

-ring

A

is Koszul if and only if there is a connected

R

-coring

C

such that

(A,C)

is Koszul. This result allows us to investigate the Hochschild (co)homology of Koszul rings. We apply our method to show that the twisted tensor product of two Koszul rings is Koszul. More examples and applications of Koszul pairs, including a generalization of Fröberg Theorem [12], are discussed in the last part of the paper.
Smooth crossed product of minimal unique ergodic diffeomorphism of odd sphere
Authors: Liu Hongzhi
Published: December 2017

For minimal unique ergodic diffeomorphisms

\alpha_n

of

S^{2n+1} (n > 0)

and

\alpha_m

of

S^{2m+1}(m>0)

, the

C^*

-crossed product algebra

C(S^{2n+1})\rtimes_{\alpha_n} \mathbb{Z}

is isomorphic to

C(S^{2m+1})\rtimes_{\alpha_m} \mathbb{Z}

even though

n\neq m

. However, by cyclic cohomology, we show that smooth crossed product algebra

C^\infty(S^{2n+1})\rtimes_{\alpha_n} \mathbb{Z}

is not isomorphic to

C^\infty(S^{2m+1})\rtimes_{\alpha_m} \mathbb{Z}

if

n\neq m

.
The noncommutative Kalton–Peck spaces
Authors: Cabello Sánchez Félix
Published: December 2017

For every von Neumann algebra

\mathcal M

and

0<p<\infty

we construct a nontrivial exact sequence of

\mathcal M

-bimodules and homomorphisms

0\to L_p\to Z_p(\mathcal M)\to L_p\to 0

, where

L_p

is the Haagerup

L_p

space built over

\mathcal M

. The middle space

Z_p(\mathcal M)

can be seen as a noncommutative version of the Kalton–Peck space

Z_p

.
Spectral triples for nested fractals
Authors: Guido Daniele , Isola Tommaso
Published: December 2017

It is shown that, for nested fractals [31], the main structural data, such as the Hausdorff dimension and measure, the geodesic distance (when it exists) induced by the immersion in

\mathbb R^n

, and the self-similar energy can all be recovered by the description of the fractals in terms of the spectral triples considered in [18].
Ring-theoretic blowing down. I
Authors: Rogalski Daniel , Sierra Susan J. , Stafford J. Toby
Published: December 2017

One of the major open problems in noncommutative algebraic geometry is the classification of noncommutative projective surfaces (or, slightly more generally, of noetherian connected graded domains of Gelfand–Kirillov dimension 3). Earlier work of the authors classified the connected graded noetherian subalgebras of Sklyanin algebras using a noncommutative analogue of blowing up. In order to understand other algebras birational to a Sklyanin algebra, one also needs a notion of blowing down. This is achieved in this paper, where we give a noncommutative analogue of Castelnuovo’s classic theorem that (–1)-lines on a smooth surface can be contracted. The resulting noncommutative blown-down algebra has pleasant properties; in particular it is always noetherian and is smooth if the original noncommutative surface is smooth.

In a companion paper we will use this technique to construct explicit birational transformations between various noncommutative surfaces which contain an elliptic curve.
Oriented components and their separations
Authors: Stadler Baerbel M R , Stadler Peter F.
Published: December 2017

There is a tight connection between connectedness, connected components, and certain types of separation spaces. Recently, axiom systems for oriented connectedness were proposed leading to the notion of reaches. Here, we introduce production relations as a further generalization of connectivity spaces and reaches and derive associated systems of oriented components that generalize connected components in a natural manner. The main result is a characterization of generalized reaches in terms of equivalent separation spaces.
Generalized c-distance on cone b-metric spaces endowed with a graph and fixed point results
Authors: Fallahi Kamal , Abbas Mujahid , Soleimani Rad Ghasem
Published: December 2017

The aim of this paper is to present fixed point results of contractive mappings in the framework of cone b-metric spaces endowed with a graph and associated with a generalized c-distance. Some corollaries and an example are presented to support the main result proved herein. Our results unify, extend and generalize various comparable results in the literature.
African volcanic emissions influencing atmospheric aerosol particles over the Amazon rain forest
Authors: Saturno Jorge , Ditas Florian , Penning de Vries Marloes , Holanda Bruna A. , Pöhlker Mira L. , Carbone Samara , Walter David , Bobrowski Nicole , Brito Joel , Chi Xuguang , Gutmann Alexandra , Hrabe de Angelis Isabella , Machado Luiz A. T. , Moran-Zuloaga Daniel , Rüdiger Julian , Schneider Johannes , Schulz Christiane , Wang Qiaoqiao , Wendisch Manfred , Artaxo Paulo , Wagner Thomas , Pöschl Ulrich , Andreae Meinrat O. , Pöhlker Christopher
Published: December 2017

Abstract. Long-range transport (LRT) plays an important role in the Amazon rain forest by bringing in different primary and secondary aerosol particles from distant sources. The atmospheric oxidation of dimethyl sulfide (DMS), emitted from marine plankton, is considered an important sulfate source over the Amazon rain forest, with a lesser contribution from terrestrial soil and vegetation sulfur emissions. Volcanic sulfur emissions from Africa could be a source of particulate sulfate to the Amazonian atmosphere upon transatlantic transport but no observations have been published. By using satellite observations, together with ground‑based and airborne aerosol particle observations, this paper provides evidence of the influence that volcanic emissions have on the aerosol properties that have been observed in central Amazonia. Under the volcanic influence, sulfate mass concentrations reached up to 3.6 µg m−3 (hourly mean) at ground level, the highest value ever reported in the Amazon region. The hygroscopicity parameter was higher than the characteristic dry-season average, reaching a maximum of 0.36 for accumulation mode aerosol particles. Airborne measurements and satellite data indicated the transport of two different volcanic plumes reaching the Amazon Basin in September 2014 with a sulfate-enhanced layer at an altitude between 4 and 5 km. These observations show that remote volcanic sources can episodically affect the aerosol cycling over the Amazon rain forest and perturb the background conditions. Further studies should address the long-term effect of volcanogenic aerosol particles over the Amazon Basin by running long-term and intensive field measurements in the Amazon region and by monitoring African emissions and their transatlantic transport.
Phytoplankton growth and physiological responses to a plume front in the northern South China Sea
Authors: Li Qian P. , Zhou Weiwen , Chen Yinchao , Wu Zhengchao
Published: December 2017

Abstract. Due to a strong river discharge during April–June 2016, a persistent salinity front, with freshwater flushing seaward on the surface but seawater moving landward at the bottom, was formed in the coastal waters west of the Pearl River Estuary (PRE) over the Northern South China Sea (NSCS) shelf. Hydrographic measurements revealed that the salinity front was influenced by both river plume and coastal upwelling. Shipboard nutrient-enrichment experiments with size-fractionation chlorophyll-a measurements were performed on both sides of the front as well as the front zone to diagnose the spatial variations of phytoplankton physiology across the frontal system. We also assessed the size-fractionated responses of phytoplankton to the treatment of plume water at the frontal zone and the seaside of the front. Biological impact of vertical mixing or upwelling was further examined by the response of surface phytoplankton to the addition of local bottom water. Our results suggested that there was a large variation of phytoplankton physiology on the seaside of the front driven by dynamic nutrient fluxes, although P-limitation was prevailing on the shore-side of the front and at the frontal zone. The spreading of plume water at the frontal zone would directly improve the growth of micro-phytoplankton, while nano- and pico-phytoplankton growths could become saturated at high percentages of plume water. Also, the mixing of bottom water would stimulate the growth of surface phytoplankton on both sides of the front by altering the surface N / P ratio closer to the Redfield stoichiometry. In summary, phytoplankton growth and physiology could be profoundly influenced by physical dynamics of the frontal system during the spring–summer of 2016.
Forest transitions: a new conceptual scheme
Authors: Kull Christian A.
Published: December 2017

Abstract. Forest transitions have recently received much attention, particularly in the hope that the historical transitions from net deforestation to forest recovery documented in several temperate countries might be reproduced in tropical countries. The analysis of forest transitions, however, has struggled with questions of forest definition and has at times focussed purely on tree cover, irrespective of tree types (e.g. native forest or exotic plantations). Furthermore, it has paid little attention to how categories and definitions of forest are used to political effect or shape how forest change is viewed. In this paper, I propose a new heuristic model to address these lacunae, building on a conception of forests as distinct socio-ecological relationships between people, trees, and other actors that maintain and threaten the forest. The model draws on selected work in the forest transition, land change science, and critical social science literatures. It explicitly forces analysts to see forests as much more than a land cover statistic, particularly as it internalizes consideration of forest characteristics and the differential ways in which forests are produced and thought about. The new heuristic model distinguishes between four component forest transitions: transitions in quantitative forest cover (FT1); in characteristics like species composition or density (FT2); in the ecological, socio-economic, and political processes and relationships that constitute particular forests (FT3); and in forest ideologies, discourses, and stories (FT4). The four are interlinked; the third category emerges as the linchpin. An analysis of forest transformations requires attention to diverse social and ecological processes, to power-laden official categories and classifications, and to the discourses and tropes by which people interpret these changes. Diverse examples are used to illustrate the model components and highlight the utility of considering the four categories of forest transitions.
On the Role of the North Equatorial Counter Current in Transporting Heat during a Strong El Niño
Authors: Webb David J.
Published: December 2017

Abstract. An analysis of archived data from the Nemo 1/12th degree global ocean model shows the importance of the NECC in the development of the 1982-83 El Niño. The model results indicate that heat transport by the NECC is usually restricted by a combination of Ekman transport, geostrophic inflow and tropical instability waves. During the development of an El Niño these may be reduced near to and to the west of the region of increased atmospheric convection in the Pacific. This allows increased heat transport eastwards by the NECC which in turn may move the atmospheric convection further east across the Pacific Ocean.
Framework To Guide The Collection And Use Of Patient-Reported Outcome Measures In
The Learning Healthcare System
Authors: Franklin Patricia D. , Chenok Kate E. , Lavalee Danielle , Love Rebecca , Paxton Liz , Segal Courtney , Holve Erin
Published: December 2017

Background: Web-based collection of patient-reported outcome measures (PROMs) in
clinical practice is expanding rapidly as electronic health records include web portals
for patients to report standardized assessments of their symptoms. As the value of PROMs
in patient care expands, a framework to guide the implementation planning, collection,
and use of PROs to serve multiple goals and stakeholders is needed.Methods: We
identified diverse clinical, quality, and research settings where PROMs have been
successfully integrated into care and routinely collected and analyzed drivers of
successful implementation. Findings are based on key informant interviews with 46
individuals representing 38 organizations, of whom 40 participated in a webinars series,
and 25 attended an in-person workshop designed to enable broad stakeholder input, review
and refinement of the proposed PROMs implementation model. Stakeholders identified
differing uses of PROMs to support: 1) individual patient care decisions, 2) quality
improvement initiatives, 3) payer mandates, and 4) population health and
research.Results: The implementation framework and steps that are consistently
identified by stakeholders as best practices to guide PROM capture and use are
described. Of note, participants indicate that web-based informatics tools are necessary
but not sufficient for PROM use, suggesting that successful PROM implementation requires
integration into clinic operations and careful planning for user’s analytic needs. Each
of the four identified uses may require implementation modifications at each step to
assure optimal use.Conclusions: The proposed framework will guide future PROM
implementation efforts across learning health care systems to assure that complete PROMs
are captured at the correct time, and with associated risk factors, to generate
meaningful information to serve diverse stakeholders.
Analytical Methods for a Learning Health System: 3. Analysis of Observational
Studies
Authors: Stoto Michael , Oakes Michael , Stuart Elizabeth , Brown Randall , Zurovac Jelena , Priest Elisa L.
Published: December 2017

The third paper in a series on how learning health systems can use routinely
collected electronic health data (EHD) to advance knowledge and support continuous
learning, this review describes how analytical methods for individual-level electronic
health data EHD, including regression approaches, interrupted time series (ITS)
analyses, instrumental variables, and propensity score methods, can also be used to
address the question of whether the intervention “works.”The two major potential sources
of bias in non-experimental studies of health care interventions are that the treatment
groups compared do not have the same probability of treatment or exposure and the
potential for confounding by unmeasured covariates. Although very different, the
approaches presented in this chapter are all based on assumptions about data, causal
relationships, and biases. For instance, regression approaches assume that the
relationship between the treatment, outcome, and other variables is properly specified,
all of the variables are available for analysis (i.e., no unobserved confounders) and
measured without error, and that the error term is independent and identically
distributed. The instrumental variables approach requires identifying an instrument that
is related to the assignment of treatment but otherwise has no direct on the outcome.
Propensity score methods approaches, on the other hand, assume that there are no
unobserved confounders. The epidemiological designs discussed also make assumptions, for
instance that individuals can serve as their own control.To properly address these
assumptions, analysts should conduct sensitivity analyses within the assumptions of each
method to assess the potential impact of what cannot be observed. Researchers also
should analyze the same data with different analytical approaches that make alternative
assumptions, and to apply the same methods to different data sets. Finally, different
analytical methods, each subject to different biases, should be used in combination and
together with different designs, to limit the potential for bias in the final
results.
The impact of nephrectomy on bone health
Authors: Kakareko Katarzyna , Hryszko Tomasz , Naumnik Beata
Published: December 2017

Normal kidneys function plays a crucial role in maintaining bone health. This fact is highlighted by the mineral-bone disorder resulting from chronic kidney disease (CKD). CKD impairs the skeletal structure, which in turn leads to a higher prevalence of bone fractures. Because nephrectomy results in a reduced number of nephrons, the question arises if surgically induced nephron loss causes alterations in bone health similar to those observed in CKD.
A large number of studies draw attention to the fact that nephrectomy leads to mineral disturbances. Recent studies are consistent that nephrectomy leads to a decline in phosphate and calcitriol levels and an increase in parathyroid hormone levels. There is no consensus regarding the impact of surgically induced nephron loss on fibroblast growth factor 23 (FGF-23) levels. Whether the observed alterations translate into increased fractures rate is still unclear. Current data is sparse and further studies are required to evaluate the possible adverse impact of nephrectomy on bone health.
This is a review of the literature exploring the impact of nephrectomy on mineral disturbances and bone health.
Diagnosis and treatment of nasal and paranasal inverted papillomas – epidemiology and own experience
Authors: Nowosielska-Grygiel Joanna , Pietkiewicz Piotr , Owczarek Kalina , Olszewski Jurek , Miłoński Jarosław
Published: December 2017

Introduction. The aim of this study was to analyse the occurrence of inverted papillomas of the nose and paranasal
sinuses in patients that underwent endoscopic sinus surgery in our department.
Material and methods. Between 2006 and 2016, 3,574 patients underwent surgery due to paranasal sinus diseases.
Patients were qualified for surgery based on medical history, computed tomography, and laboratory tests. Data were
gathered from medical files, and they included age, sex, and histopathological diagnosis.
Results. Among 3,574 patients that underwent surgery due to chronic inflammatory changes, on histopathology, inverted
papillomas were diagnosed in 80 patients, including 31 women (38.75%) and 49 men (61.25%). Most patients
were aged 60-70 years (women, 12.5%; men, 15%) or 50-60 years (women, 5%; men, 21.25%). Between 2006 and 2016,
the number of surgeries ranged from 264 (7.38%) in 2013 to 355 (9.93%) in 2016, and the number of inverted papillomas
ranged from 4 in 2007 and 2015 (1.23%) to 12 in 2014 (3.87%). Over the last 4 years of the study period, the incidence
of inverted papillomas increased.
Conclusions. Among 3,574 patients operated on due to chronic inflammatory changes, on histopathology, inverted
papillomas were diagnosed in 80 cases (2.23%); thus, all patients qualified for endoscopic surgery due to inflammatory
or hypertrophic changes should undergo rhino-fiberoscopy. Recurrence of inverted papillomas was observed in
17.50%, typically in patients with nasal polyps that co-occurred with inverted papillomas. We regard rhino-fiberoscopy
as the most valuable method for detecting tumour recurrence in patients after surgery for inverted papillomas.
La mort de Papa Alexandre VI, segons un poema anònim italià de 1504
Authors: Benavent Júlia
Published: December 2017

Resum: Un poema en octaves sobre la mort d’Alexandre VI, inèdit i anònim, publicat a Itàlia, aporta noves dades sobre la literatura contra els Borja. En aquesta ocasió  Alexandre VI és mostrat com un nigromàntic que no sap veure l’anunci de la seua mort.   Paraules clau: Alexandre VI, nigromància, segle XVI, Borja, poema Abstract: A poem in octaves about the death of Alexandre VI, unpublished and anonymous, printed in Italy, provides new data on the literature against the Borja family. In this instance, the poem portrays Alexandre VI as a necromancer who cannot see the announcement of his own death. Keywords: Alexandre VI, necromancy, 16th century, Borja, poem