showing 36 of ~574560 from 574555 documents
Les espaces fortifiés à l’âge du Fer en Europe. Actes du 43e colloque international de l’AFEAF
2021
Depuis le colloque de Bavay et Mons en 1982, dédié aux fortifications de l’âge du Fer, aucun colloque de l’AFEAF n’a spécifiquement traité de la question des espaces fortifiés à l’échelle européenne. Cette thématique, fondatrice de l’archéologie protohistorique en Europe, a vu les fondements méthodologiques qui la caractérisent dès les prémices de la discipline au XIXe siècle évoluer considérablement. Depuis les premières fouilles sur les grands sites de la Guerre des Gaules, conduites sous l’impulsion de Napoléon III, en passant par les inventaires généralisés en Europe au début du XXe siècle — on peut citer par exemple le travail de la Commission des Enceintes de la Société Préhistorique …
Les mousses des champs : quels effets sur les cultures ?
2021
Le développement de bryophytes dans les systèmes cultivés,notamment ceux limitant très fortement le travail du sol, pose la question de leur impact sur les cultures et la écessité ou non de les contrôler.CONTEXTE - Les bryophytes sont largement présentes dans les milieux occupés parl’homme. Comme pour beaucoup de communautés se développant dans de tels environnements (espèces adventices, insectes, etc.),leur présence peut être perçue positivementou négativement en fonction de la gêne, fondéeou infondée, qu’elle provoque.ÉTUDE - Cet article a pour objectif de mieuxconnaître cette composante de l’agroécosystème et de comprendre comment elle fonctionne et quelles sont ses interactions potentie…
Anatomía quirúrgica de la vascularización mesocólica aplicada a la colectomía oncológica mínimamente invasiva
2021
La evolución de la cirugía oncológica en el cáncer de colon plantea la necesidad de resecciones más amplias y radicales, que pueden aumentar el riesgo de complicaciones intraoperatorias, principalmente vasculares. El conocimiento detallado de la anatomía vascular del colon y sus posibles variaciones se ha vuelto crucial para el cirujano laparoscopista. El objetivo principal de este trabajo es analizar la variabilidad en la vascularización del colon derecho y del ángulo esplénico, así como su aplicabilidad en la cirugía mínimamente invasiva del cáncer de colon. MATERIAL Y MÉTODOS Estudio anatómico en 27 cadáveres humanos dividido en dos apartados: - Estudio anatómico del colon derecho: se ha…
Antroponimia latina mensual
2021
(Monthly Latin Anthroponymy) Recently, it has been proposed that the use of numerals for Roman personal names is due to an association with the lunar calendar (e.g. Octauius '[born in] the eighth [month]'). However, this new proposal could face some serious and important objections.
Public policy in families and successions regulations : the case of ?talaq?
2021
According to EU Regulations on transnational families and successions, a foreign rule remains without effect if it is deemed contrary to the so-called public policy (ordre public) of the forum?s legal system. As a consequence, judges have to evaluate whether the application of foreign law is incompatible with fundamental principles of the domestic law, especially whether it would constitute a violation against human rights. An outstanding controversial issue is today represented by Islamic repudiation (talaq): two contrasting Italian judicial decisions of August 2020 may illustrate how difficult it could be to determine what public policy is.
Declaration of will of persons with disabilities in the general theory of legal act and the new perspective based on supports. A study of peruvian law
2021
Indexado en Redib La Convención sobre los Derechos de las Personas con Discapacidad ha supuesto, en términos generales, un replanteamiento de la idea de autonomía de la voluntad al reconocer plena capacidad jurídica en todo sujeto con independencia de su discapacidad. Esta nueva realidad viene a modificar el modo de conceptuar e interpretar la declaración de voluntad en la teoría general del acto jurídico, y muy en especial, cuando la capacidad natural de conocer y querer puede venir naturalmente limitada por una discapacidad psíquica o por un estado de coma. La formación interna de la voluntad y su manifestación se vuelve un asunto complejo, sobre todo cuando los apoyos podrían no ser gara…
Influencia de factores epigeneticos en el desarrollo de la escoliosis idiopatica del adolescente
2021
La escoliosis idiopática del adolescente (EIA) es una enfermedad que afecta de forma tri-dimensional a la estructura de la columna vertebral. Aunque su prevalencia en la población adolescente es baja, entre el 1-3%, la repercusión económica que acarrea su cribado, diagnóstico y tratamiento son elevados. Los programas de cribado actuales carecen de suficiente evidencia científica de calidad que los respalde. Su manejo va a depender de la magnitud de la curva en cada valoración que se le haga al paciente y del potencial de crecimiento remanente, es decir, de su evolución. Es por ello que muchos especialistas involucrados en el manejo de la EIA sienten que las terapias viajan un paso por detrá…
Henri Tintant (1918-2002).
2021
1 page; National audience
Sancho López, M.: : Derecho al olvido y Big Data: dos realidades convergentes, Tirant lo Blanch, València.
2021
Arbeideridretten i Aust-Agder i mellomkrigstiden.
2021
Soustraire l’alimentation du débat sur les pesticides : traitement médiatique d’un problème en une
2021
International audience
Adaptación marginal en incrustaciones obtenidas a partir de dos sistemas de impresión: impresión convencional y escáner digital. Estudio in vitro
2021
El objetivo es conocer si los escáneres intraorales True Definition (3M ESPE, Seefeld, Germany) y Cerec Omnicam (Denstply Sirona, Ballaigues, Switzerland) ofrecen una buena adaptación marginal en incrustaciones comparándolos con impresiones convencionales con silicona (Express™ VPS Impression Material, 3M ESPE, Seefeld, Germany). Metodología Se seleccionaron 81 molares extraídos libres de caries, totalmente íntegros bajo consentimiento informado del paciente. Los dientes fueron embebidos en escayola 2 mm por encima de la unión amelocementaria en grupos de 10 dientes, imitando la forma de una arcada dentaria. Para la preparación de las incrustaciones se utilizaron fresas de diamante realizan…
Tratamiento de preservación de fertilidad en pacientes con cáncer de endometrio
2021
El carcinoma endometrial (CE) en mujeres jóvenes es un hecho infrecuente, tan solo el 4% de los diagnósticos se realizan en menores de 40 años. El estándar para el tratamiento es la cirugía con una supervivencia global a 5 años en torno al 93%. Como alternativa, en casos en los que existe un gran deseo genésico, se puede plantear un tratamiento conservador alternativo basado en progestágenos orales, fundamentalmente acetato de medroxiprogesterona o acetato de megestrol y más recientemente, DIU de levonorgestrel. Esta opción se podría considerar en pacientes con diagnóstico histológico de CE bien diferenciado (o enfermedad premaligna como hiperplasia atípica) en estadio inicial, cuando no ex…
Le monastère lacustre du Grandvaux
2021
International audience
Puits et chambres d’exploitation du silex à Vert-la-Gravelle (Vert-Toulon) « La Crayère » (Marne) [résumé]
2021
Pourquoi avons-nous besoin du témoignage ? Penser le témoignage avec Paul Ricœur
2021
International audience
Pioneering investigators 2021
2021
This themed issue of Polymer Chemistry highlights the work of pioneering investigators in the polymer chemistry field. Associate Editors Emily Pentzer and Holger Frey introduce the issue.
Beta-receptor desensitization evoked by a multistage ultralong distance exercise in the desert?
2021
Background Few studies addressed to the evolution of cardiac function during a multistage ultra-long duration exercise (MULDE). Methods Serial echocardiographic assessment of cardiac function was performed in male healthy subjects during the 2014 Marathon des Sables before the race (T1), at the second (T2) and fifth (T3) arrival (236 km) then after 48 h recovery. Analysis were performed by 2 sonographers blind for the results of the other and the time of measure. Statistical analysis was performed using ANOVA-RM to compare the evolution of the different parameters. Results Among the 20 athletes, 18 completed the study (mean age 42.4, median 42). RR intervals and (Left ventricular End Diasto…
Introducing a 1,1-diphenylethylene analogue for vinylpyridine: anionic copolymerisation of 3-(1-phenylvinyl)pyridine (m-PyPE)
2021
3-(1-Phenylvinyl)pyridine (m-PyPE), prepared by Wittig reaction from the readily available 3-benzoylpyridine, represents a structural analog of 1,1-diphenylethylene (DPE), one phenyl group being replaced by pyridine. The suitability of m-PyPE for the copolymerisation with vinylpyridine is reflected by the 13C NMR shifts of the β-carbon of 2-vinylpyridine (2-VP; 118.32 ppm) and m-PyPE (115.83 ppm, measured in CDCl3), which possess predictive character for carbanionic copolymerisation. In analogy to DPE and its manifold reported derivatives, carbanionic homopolymerisation of m-PyPE was not possible, due to its steric bulk. Copolymers of 2-VP and m-PyPE with varied composition have been synthe…
On survivor stocks in the S&P 500 stock index
2021
This paper investigates the performance and characteristics of survivor stocks in the S&P 500 index. Using both in-sample and out-of-sample comparisons, survivor stocks outperformed this market index by a considerable margin. Relative to other S&P 500 index companies, survivor stocks tend to be small value stocks that exhibit high profitability and invest conservatively. Surprisingly, survivor stocks tend to be loser stocks with negative exposure to the momentum factor. Further analyses show that the volatility of the survivor stocks portfolio is less exposed to tail risks and responds less to shocks in the innovation process.
An Attempt at Drawing an Artistic Family Tree
2021
In this chapter, the directors included in the book themselves take the floor. They reveal the major influences they have experienced as artists and, if they had to draw an artistic family tree, whom they would include on it. One of them, Krystian Lupa, has literally drawn his artistic family tree. The directors also outline the trends that have had the most formative impact on their aesthetics and work. All this is especially shared for the readers of this book. Only in the case of the late Lithuanian director Eimuntas Nekrosius is an excerpt of an existing interview used.
Considering lithium-ion battery 3D-printing via thermoplastic material extrusion and polymer powder bed fusion
2021
Abstract In this paper, the ability to 3D print lithium-ion batteries through Pmnbspace thermoplastic material extrusion and polymer powder bed fusion is considered. Focused on the formulation of positive electrodes composed of polypropylene, LiFePO4 as active material, and conductive additives, advantages and drawbacks of both additive manufacturing technologies, are thoroughly discussed from the electrochemical, electrical, morphological and mechanical perspectives. Based on these preliminary results, strategies to further optimize the electrochemical performances are proposed. Through a comprehensive modeling study, the enhanced electrochemical suitability at high current densities of va…
Soft Tissue Sarcomas (STS)
2021
Soft tissue sarcomas (STSs) represent a rare and heterogeneous group of solid tumors derived from mesenchymal progenitors and account for 1% of all adult malignancies. Although in the last decade anthracycline-based chemotherapy single agent or in combination has been able to improve clinical benefits, prognosis is still poor, and STSs represent an important unmet medical need.
Stress/strain effects on electrochemical activity: Metallurgical/mechanical/interactions and surface reactivity
2021
Abstract Tribocorrosion is of complex nature as it involves multiscale interactions between mechanical, (electro-)chemical, physical, and material factors. The influence of mechanical stresses/strains on the surface reactivity of metallic alloys is described here. The electrochemical behavior and the corrosion resistance of engineering alloys are discussed in the presence of compressive and tensile stresses through different examples. The role of physical (formation of steps, roughness, microcracks), metallurgical (dislocations, crystallographic texture, and grain size), and chemical (passive film composition) changes induced by plastic deformation on electrochemical behavior and corrosion …
The Organizational Culture in the Days Post 9/11
2021
In the recent years, terrorism has posed as one of the main threats of the West. In fact, TV programs, books, documentaries, and thousands of published papers have flooded not only the media screen but also the academic events. In spite of this exaggerated attention, little is known on the effects of terrorism in daily life. To be more exact, the effects of terrorism in the working culture. This paper focuses on how the life of lay-worker has been modified after the 9/11, as well as how the organizational culture and labor relations have radicalized in the days post 9/11.
Socioeconomic status and parent perceptions about the costs and benefits of youth sport.
2021
Objectives Describe what costs and benefits parents across the socioeconomic spectrum weight most heavily when making decisions about sport participation for their children. Method Cross-sectional survey of a nationally representative online panel of parents of children between the ages of 5 and 18 (n = 1025, 52% response rate). Parents rated the importance of a series of potential costs and benefits of youth sport and these responses were compared across tertiles of per capita family income. We first examined the association between family income tertiles and cost and benefit variables. Model-based cluster analysis was then used to identity homogeneous groups of responses to costs and ben…
Proton sponge lead halides containing 1D polyoctahedral chains
2021
Hybrid one-dimensional lead halides, containing the protonated 1,8-bis(dimethylamino)naphthalene moiety (C14H19N2, monoprotonated "proton sponge"), were prepared by simple one-pot methods and investigated in terms of crystal structure, morphology, thermal stability and electronic properties. The as-precipitated (C14H19N2)PbBr3 and (C14H19N2)PbI3 species are isostructural and crystallize in the orthorhombic Pbca space group, resulting in 1D crystal phases with ([PbX3](-))(infinity) chains (built by face-sharing [PbX6] octahedra; X = Br, I), among which the (C14H19N2)(+) cations are inserted. The two compounds display complete miscibility in the solid state: both (C14H19N2)PbI2Br and (C14H19N…
Towards digital cognitive clones for the decision-makers: adversarial training experiments
2021
Abstract There can be many reasons for anyone to make a digital copy (clone) of own decision-making behavior. This enables virtual presence of a professional decision-maker simultaneously in many places and processes of Industry 4.0. Such clone can be used as one’s responsible representative when the human is not available. Pi-Mind (“Patented Intelligence”) is a technology, which enables “cloning” cognitive skills of humans using adversarial machine learning. In this paper, we present a cyber-physical environment as an adversarial learning ecosystem for cloning image classification skills. The physical component of the environment is provided by the logistic laboratory with camera-surveilla…
Predicting the invasion of the acoustic niche: Potential distribution and call transmission efficiency of a newly introduced frog in Cuba
2021
8 pages; International audience; Leptodactylus fragilis is a recently introduced frog in Cuba, where it may impact local populations of amphibians in different ways. Here, we combined two methods to predict the invasion of the acoustic niche of Cuban amphibians by L. fragilis. We first use species distribution models to predict the spread and establishment of L. fragilis in Cuba. We then performed sound propagation experiments to evaluate the potential invasion of the acoustic niche in predicted suitable areas for the presence of L. fragilis. This species could have a successful establishment, spreading mainly in open areas, where its advertisement calls propagate efficiently, with low atte…
Reflections on the Other Side. A Southern Iberia Origin for the First Pottery Production of Northern Morocco?
2021
Archaeological works in Morocco (the Spanish-Moroccan team) were funded by a European Research Council Advanced Grant AGRIWESTMED (Origins and spread of agriculture in the western Mediterranean region) coordinated by L.P.-CH. Processing works were performed thanks to a IJCI-2016-27812 -Spanish Ministry of Science, Innovation and Universities-Universidad de Granada, Juan de la Cierva-Incorporacion Agreement (2016, by RMMS), and by funding provided in the framework of project "Archaeobiology of the Neolithic of the Southern Iberian Peninsula" (NeArqBioSI) A-HUM-460-UGR18 by Consejeria de Economia, Conocimiento, Empresas y Universidad. FEDER Programme - Andalusian CouncilGranada University. Fi…
Eight-membered heterocycles with two heteroatoms in a 1,2-relationship of interest in medicinal chemistry
2021
Abstract This chapter treats 1,2-diheterocines, eight membered heterocyclic systems with two heteroatoms, N, O and S, in an 1,2 relationship, exhibiting biological properties and exhaustively covers the literature from 2007 to the end of November 2019. In this period of time 1,2-diazocine, 1,2-oxazocine, 1,2-dioxocin and 1,5-dithiocin ring systems had derivatives exhibiting pharmacological activities. No articles on biological properties have been reported for 1,2-thiazocines and 1,2-oxathiocins. Besides uncondensed derivatives, 1,2-diheterocines fused with five-, six-, and seven-membered carbocycles or heterocycles have been reviewed, as well as bridged 1,2-diheterocines.
Infant gut microbiota modulation by human milk disaccharides in humanized microbiome mice
2021
Human milk glycans present a unique diversity of structures that suggest different mechanisms by which they may affect the infant microbiome development. A humanized mouse model generated by infant fecal transplantation was utilized here to evaluate the impact of fucosyl-α1,3-GlcNAc (3FN), fucosyl-α1,6-GlcNAc, lacto-N-biose (LNB) and galacto-N-biose on the fecal microbiota and host–microbiota interactions. 16S rRNA amplicon sequencing showed that certain bacterial genera significantly increased (Ruminococcus and Oscillospira) or decreased (Eubacterium and Clostridium) in all disaccharide-supplemented groups. Interestingly, cluster analysis differentiates the consumption of fucosyl-oligosacc…
BMI-BFMNU: A structural index linked to fat mass
2021
Abstract Introduction: Body mass index (BMI) provides little information on body composition. For example, two people with the same BMI might have different body compositions. In this sense, the development of a new BMI able to provide body composition information is of clinical and scientific interest. The aim of the study was to suggest a new modified BMI formula. Material and Methods: A total of 108 subject, females 56 and males 52, 0-73 years old, in various physiopathological conditions were evaluated. Data were collected and processed by a program that through anthropometric measurements calculates classic BMI, volume, surface, V/S (that we can defined like a body-thickness “pse…
Resistance training for chronic low back pain in the elderly: A systematic review
2021
Chronic low back pain is a musculoskeletal pathology with a considerably high prevalence in the elderly. This condition increases disability and negatively affects the quality of life. Muscular resistance training is being used as a cornerstone in interventions for elder people due to the numerous benefits associated with physical and functional health. For this reason, the purpose of this study was to systematically review the literature on the main characteristics of resistance training programs in the elder population with chronic low back pain. A literature search in five databases (PubMed, Scopus, Web of Science, Sports Discuss, and Cochrane Library) was carried out. Inclusion-exclusio…
Laboratory disruption of scaled astrophysical outflows by a misaligned magnetic field
2021
The shaping of astrophysical outflows into bright, dense, and collimated jets due to magnetic pressure is here investigated using laboratory experiments. Here we look at the impact on jet collimation of a misalignment between the outflow, as it stems from the source, and the magnetic field. For small misalignments, a magnetic nozzle forms and redirects the outflow in a collimated jet. For growing misalignments, this nozzle becomes increasingly asymmetric, disrupting jet formation. Our results thus suggest outflow/magnetic field misalignment to be a plausible key process regulating jet collimation in a variety of objects from our Sun’s outflows to extragalatic jets. Furthermore, they provide…