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Milankovitch-driven cycles in the Precambrian of China:The Wumishan Formation

Journal of Palaeogeography 2013年第4期2卷 369-389页

作者： Mei Mingxiang maurice E. Tucker State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences (Beijing) Department of Earth Sciences University of Durham

Carbonate strata of the Mesoproterozoic Wumishan Formation in the Jixian area near Tianjin are ~3300 m thick and were deposited over some 100 million years(from ~1310±20 Ma to ~1207±10 Ma).Metre-scale cycles(parasequences) dominate the *** are generally of the peritidal carbonate type,and mostly show an approximately symmetrical lithofacies succession with thick stromatolite biostromes and small thromboliteoncolite bioherms constituting the central part and tidal-flat dolomites forming the upper and lower ***-supratidal dolomitic shales with palaeosol caps make up the topmost *** boundaries of the Wumishan cycles are typically exposure surfaces,and there is abundant evidence for fresh-water *** 1:4 stacking patterns indicate that the individual Wumishan cycles are sixthorder parasequences,with 4 parasequences constituting one fifth-order parasequence ***,5-8 beds or couplets,can be discerned in some of the *** regular vertical stacking pattern of beds within the sixth-order parasequences,forming the fifth-order parasequence sets,are interpreted as the result of environmental fluctuations controlled by Milankovitch rhythms,namely the superimposition of precession,and short and *** widespread 1:4 stacking pattern in the cyclic succession,as well as the local 1:5-8 stacking patterns of the beds within the cycles,suggest that the Milankovitch rhythms had similar ratios in the Mesoproterozoic as in the *** on the cycle stacking patterns,26 thirdorder sequences can be distinguished and these group into 6 second-order,transgressiveregressive megasequences(or sequence sets),all reflecting a composite,hierarchical succession of relative sea-level changes.

关键词： peritidal carbonate cycles Milankovitch rhythms Wumishan Formation Mesoproterozoic Tianjin North China

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Spatial distribution characteristics of climate-induced landslides in the Eastern Himalayas

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Journal of Mountain Science 2024年第10期21卷 3396-3412页

作者： UWIZEYIMANA David LIU Weiming HUANG Yu HABUMUGISHA Jules maurice ZHOU Yanlian YANG Zewen State Key Laboratory of Mountain Hazards and Engineering Resilience Institute of Mountain Hazards and EnvironmentChinese Academy of Sciences(CAS)Chengdu 610299China China–Pakistan Joint Research Center on Earth Sciences CAS-HECIslamabad 45320Pakistan University of Chinese Academy of Sciences Beijing 100049China

Climate warming is constantly causing hydro-meteorological perturbations,especially in high-altitude mountainous regions,which lead to the occurrences of *** impact of climatic variables(i.e.,precipitation and temperature)on the distribution of landslides in the eastern regions of the Himalayas is poorly *** address this,the current study analyzes the relationship between the spatial distribution of landslide characteristics and climatic variables from 2013 to *** Earth Engine(GEE)was employed to make landslide inventories using satellite *** results show that 2163,6927,and 9601 landslides were heterogeneously distributed across the study area in 2013,2017,and 2021,*** maximum annual temperature was positively correlated with the distribution of landslides,whereas precipitation was found to have a non-significant impact on the landslide ***,most of the landslides occurred in areas with maximum annual precipitation ranging from 800 to 1600 mm and maximum annual temperature above 15℃.However,in certain regions,earthquake disruptions marginally affected the occurrence of *** were highly distributed in areas with elevations ranging between 3000 and 5000 m above sea level,and many landslides occurred near the lower permafrost limit and close to *** latter indicates that temperature change-induced freeze-thaw action influences landslides in the *** changes have shown a positive correlation with the number of landslides within elevations,indicating that temperature affects their spatial *** climate projections suggest that the region will experience further warming,which will increase the likelihood of landslides in the ***,it is crucial to enhance ground observation capabilities and climate datasets to effectively monitor and mitigate landslide risks.

关键词： Landslide inventory Climate variables Normalized difference vegetation index Cryosphere Eastern Himalaya

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Malware Guard Extension:abusing Intel SGX to conceal cache attacks

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Cybersecurity 2020年第1期3卷 22-41页

作者： Michael Schwarz Samuel Weiser Daniel Gruss Clementine maurice Stefan Mangard Graz University of Technology GrazAustria CNRS IRISARennesFrance.

In modern computer systems,user processes are isolated from each other by the operating system and the ***,in a cloud scenario it is crucial that the hypervisor isolates tenants from other tenants that are co-located on the same physical ***,the hypervisor does not protect tenants against the cloud provider and thus,the supplied operating system and *** SGX provides a mechanism that addresses this *** aims at protecting user-level software from attacks from other processes,the operating system,and even physical *** this paper,we demonstrate fine-grained software-based side-channel attacks from a malicious SGX enclave targeting co-located *** attack is the first malware running on real SGX hardware,abusing SGX protection features to conceal ***,we demonstrate our attack both in a native environment and across multiple Docker *** perform a Prime+Probe cache side-channel attack on a co-located SGX enclave running an up-to-date RSA implementation that uses a constant-time multiplication *** attack works,although in SGX enclaves,there are no timers,no large pages,no physical addresses,and no shared *** a semi-synchronous attack,we extract 96%of an RSA private key from a single *** extract the full RSA private key in an automated attack from 11 traces within 5 min.

关键词： Intel SGX Side channel Side-channel attack Prime+Probe

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Adults have more male-biased sex ratios than first-winter juveniles in wintering duck populations

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Avian Research 2021年第4期12卷 623-637页

作者： Kevin A.Wood Kane Brides maurice E.Durham Richard D.Hearn Wildfowl&Wetlands Trust SlimbridgeGloucestershire GL27BTUK

Background:The long-term monitoring of demographic changes in waterbird populations remains limited,but such information can be valuable for conservationists and waterbird *** sex ratios can indicate differences in survival rates between *** particular,differences in the sex ratios of fledged juveniles and adults can provide insight into the development of male bias among ***:In this study,we used data from individual birds captured over a 57-year period to assess the extent,and temporal variability in male bias in nine populations of ducks wintering in the United Kingdom:Gadwall(Mareca strepera),Northern Mallard(Anas platyrhynchos),Northern Pintail(Anas acuta),Common Pochard(Aythya ferina),Common Shelduck(Tadorna tadorna),Northern Shoveler(Spatula clypeata),Eurasian Teal(Anas crecca),Tufted Duck(Aythya fuligula),and Eurasian Wigeon(Mareca penelope).Results:Overall,eight of these populations were significantly male-biased and adults were more male-biased than first-winter juveniles for all nine *** increased male bias among adults is consistent with the hypothesis that factors such as higher mortality of reproductive-age females during the breeding season is a major cause of male bias in duck ***,such predation cannot explain the male bias detected in first-winter juveniles in four of the *** temporal trends in male bias differed between adults and first-winter juveniles in Northern Mallard,Northern Pintail,Common Pochard,Common Shelduck,Eurasian Teal,Tufted Duck,and Eurasian *** the study period we found increased male bias among adult Northern Mallard,Northern Pintail,Common Pochard,Common Shelduck,and Tufted Duck as well as both adult and first-winter juvenile Northern ***:We provide evidence that among wintering duck populations,sex ratios are typically male-biased,with adults exhibiting stronger male-biased sex ratios than first-winter *** monitoring

关键词： Anseriformes Bird ringing Demography Population structure Sex ratio Waterfowl

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Role of the floodplain lakes in the methylmercury distribution and exchanges with the Amazon River,Brazil

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Journal of Environmental Sciences 2018年第6期30卷 24-40页

作者： Poliana Dutra Maia Laurence maurice Emmanuel Tessier David Amouroux Daniel Cossa Patricia Moreira-Turcq Henri Etcheber Universidade de Brasilia-Faculdade UnB Planaltina Area Universitaria n. 1-Vila Nossa Senhora de Fatima Planaltina 73300-000 Brasilia DF Brazil Geosciences Environnement Toulouse (GET) Observatoire Midi Pyrenees Universite de Toulouse CNRS IRD14 Avenue Edouard Belin F-32400 Toulouse France CNRS/Univ Pau & Pays Adour Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Materiaux UMR5254 F-64000 Pau Prance Universite Grenoble Alpes CP 40700 F-38058 Grenoble Cedex 9 France EPOC UMR 5805 Universite de Bordeaux I Av. des Facultes F-33405 Talence France

Seasonal variability of dissolved and particulate methylmercury（F-MeHg, P-MeHg） concentrations was studied in the waters of the Amazon River and its associated Curuai floodplain during hydrological year 2005–2006, to understand the MeHg exchanges between these aquatic systems. In the oxic white water lakes, with neutral pH, high F-MeHg and P-MeHg concentrations were measured during the rising water stage（0.70 ± 0.37 pmol/L, n = 26） and flood peak（14.19 ± 9.32 pmol/g, n = 7） respectively, when the Amazon River water discharge into the lakes was at its maximum. The lowest mean values were reported during the dry season（0.18 ± 0.07 pmol/L F-MeHg, n = 10 and 1.35 ± 1.24 pmol/g P-MeHg, n = 8）, when water and suspended sediments were outflowing from the lakes into the River. In these lakes,the MeHg concentrations were associated to the aluminium and organic carbon/nitrogen changes. In the black water lakes, with acidic pH and reducing conditions, elevated MeHg concentrations were recorded（0.58 ± 0.32 pmol/L F-MeHg, n = 16 and 19.82 ± 15.13 pmol/g PMeHg, n = 6）, and correlated with the organic carbon and manganese concentrations. Elevated values of MeHg partition coefficient（4.87 〈 Kd〈 5.08 log（L/kg） indicate that MeHg is mainly transported associated with the particulate phase. The P-MeHg enrichment detected in all lakes suggests autochthonous MeHg inputs from the sediments into the water column. The MeHg mass balance showed that the Curuai floodplain is not the source of P-MeHg for the Amazon River.

关键词： Methylmercury Water Sediment Amazon River Floodplain lakes

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Gastroesophageal signet ring cell carcinoma morbidity and mortality: A retrospective review

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1629-1636页

作者： Megan Grinlinton Chris Furkert Andrew maurice Neville Angelo Michael Booth Department of General Surgery North Shore HospitalAuckland 0620New Zealand Department of Pathology North Shore HospitalAuckland 0620New Zealand

BACKGROUND Upper gastrointestinal(GI)signet ring cell carcinomas(SRCC)confer a poor *** benefit of operative intervention for this patient group is contro-versial in terms of overall *** To investigate factors relating to survival in patients with upper GI *** A retrospective,tertiary,single-centre review of patients who were diagnosed with oesophageal,gastroesophageal junction and gastric SRCC was *** primary outcome was to compare mortality of patients who underwent operative management with those who had nonoperative ***-dary outcomes included assessing the relationship between demographic and histopathological factors,and *** One hundred and thirty-one patients were *** one-year survival for the operative group was 81%and for the nonoperative group was 19.1%.The five-year survival in the operative group was 28.6%vs 1.5%in the nonoperative *** difference in overall survival between groups was statistically significant(HR 0.19,95%CI(0.13-0.30),P<0.001).There was no difference in survival when ad-justing for age,smoking status or *** multivariate analysis,patients who underwent surgical management,those with a lower stage of disease,and those with a lower Charlson Comorbidity Index(CCI)had significantly improved *** Well-selected patients with upper GI SRCC appear to have reasonable medium-term survival following *** surgery to a carefully selected patient group may improve the outcome for this disease.

关键词： Signet ring cell carcinoma Gastric cancer Oesophageal cancer Poorly cohesive gastric cancer Diffuse gastric cancer

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Development and characterization of 3D-printed electroconductive pHEMA-co-MAA NP-laden hydrogels for tissue engineering

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Bio-Design and Manufacturing 2024年第3期7卷 262-276页

作者： Sara De Nitto Aleksandra Serafin Alexandra Karadimou Achim Schmalenberger John J.EMulvihill maurice N.Collins DIBRIS Polytechnic Inter-School Section University of Genoa16126 GenoaItaly School of Engineering Bernal InstituteUniversity of LimerickLimerick V94 T9PXIreland School of Natural Sciences Department of Biological SciencesUniversity of LimerickLimerick V94 T9PXIreland Health Research Institute University of LimerickLimerick V94 T9PXIreland AMBER University of LimerickLimerick V94 T9PXIreland

Tissue engineering(TE)continues to be widely explored as a potential solution to meet critical clinical needs for diseased tissue replacement and tissue *** this study,we developed a poly(2-hydroxyethyl methacrylate-co-methacrylic acid)(pHEMA-co-MAA)based hydrogel loaded with newly synthesized conductive poly(3,4-ethylene-dioxythiophene)(PEDOT)and polypyrrole(PPy)nanoparticles(NPs),and subsequently processed these hydrogels into tissue engineered constructs via three-dimensional(3D)*** presence of the NPs was critical as they altered the rheological properties during ***,all samples exhibited suitable shear thinning properties,allowing for the development of an optimized processing window for 3D *** were 3D printed into pre-determined disk-shaped configurations of 2 and 10 mm in height and diameter,*** observed that the NPs disrupted the gel crosslinking efficiencies,leading to shorter degradation times and compressive mechanical properties ranging between 450 and 550 *** conductivity of the printed hydrogels increased along with the NP concentration to(5.10±0.37)×10^(−7)S/*** vitro studies with cortical astrocyte cell cultures demonstrated that exposure to the pHEMA-co-MAA NP hydrogels yielded high cellular viability and proliferation ***,hydrogel antimicrobial studies with staphylococcus epidermidis bacteria revealed that the developed hydrogels affected bacterial *** together,these materials show promise for various TE strategies.

关键词： Conductive nanoparticles Hydroxyethyl methacrylate(HEMA) Ultraviolet(UV)polymerization 3D printing

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The dynamics of ant mosaics in tropical rainforests characterized using the Self-Organizing Map algorithm

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Insect Science 2016年第4期23卷 630-637页

作者： Alain Dejean Frederic Azemar Regis Cereghino maurice Leponce Bruno Corbara Jereme Orivel Arthur Compin CNRS Laboratoire Ecologie Fonctionnelle et Environnement (UMR-CNRS 5245) 31062 Toulouse Universite de Toulouse UPS INP Ecolab 118 route de Narbonne 31062 Toulouse E-cologie des Forets de Guyane Campus agronomique BP 316 97387 Kourou cedex France Biodiversity Monitoring and Assessment Unit Royal Belgian Institute of Natural Sciences Rue Vautier 29 B-1000 Brussels Belgium CNRS Laboratoire Microorganismes Genome et Environnement (UMR-CNRS 6023) Universite Blaise Pascal Complexe Scientifique des Cezeaux 63177 Aubiere cedex Clermont Universite Universite Blaise Pascal LMGE BP 10448 F-63000 Clermont-Ferrand France

Ants, the most abundant taxa among canopy-dwelling animals in tropical rainforests, are mostly represented by territorially dominant arboreal ants （TDAs） whose territories are distributed in a mosaic pattern （arboreal ant mosaics）. Large TDA colonies regulate insect herbivores, with implications for forestry and agronomy. What generates these mosaics in vegetal formations, which are dynamic, still needs to be better understood. So, from empirical research based on 3 Cameroonian tree species （Lophira alata, Ochnaceae; Anthocleista vogelii, Gentianaceae; and Barteriafistulosa, Passifloraceae）, we used the Self-Organizing Map （SOM, neural network） to illustrate the succession of TDAs as their host trees grow and age. The SOM separated the trees by species and by size for L. alata, which can reach 60 m in height and live several centuries. An ontogenic succession of TDAs from sapling to mature trees is shown, and some ecological traits are highlighted for certain TDAs. Also, because the SOM permits the analysis of data with many zeroes with no effect of outliers on the overall scatterplot distributions, we obtained ecological information on rare species. Finally, the SOM permitted us to show that functional groups cannot be selected at the genus level as congeneric species can have very different ecological niches, something particularly true for Crematogaster spp., which include a species specifically associated with B. fistulosa, nondominant species and TDAs. Therefore, the SOM permitted the complex relationships between TDAs and their growing host trees to be analyzed, while also providing new information on the ecological traits of the ant species involved.

关键词： ant plant relationships dynamics of associations myrmecophytes tropicalrainforests

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Relative importance of long-term changes in climate and land-use on the phenology and abundance of legume crop specialist and generalist aphids

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Insect Science 2019年第5期26卷 881-896页

作者： Martin Luquet maurice Hulle Jean-Christophe Simon Nicolas Parisey Christelle Buchard2 Bruno Jaloux Agrocampus Ouest Centre of AngersInstitute of GeneticsEnvironment and Plant Protection (IGEPP-Joint Research Unit 1349) AngersFrance INRA Institute of GeneticsEnvironment and Plant Protection (IGEPP-Joint Research Unit 1349)Le Rheu France

Abstract Insect populations are prone to respond to global changes through shifts in phenology, distribution and abundance. However, global changes cover several factors such as climate and land-use, the relative importance of these being largely unknown. Here, we aim at disentangling the effects of climate, land-use, and geographical drivers on aphid abundance and phenology in France, at a regional scale and over the last 40 years. We used aerial data obtained from suction traps between 1978 and 2015 on five aphid species varying in their degree of specialization to legumes, along with climate, legume crop area and geographical data. Effects of environmental and geographical variables on aphid annual abundance and spring migration dates were analyzed using generalized linear mixed models. We found that within the last four decades, aphids have advanced their spring migration by a month, mostly due to the increase in temperature early in the year, and their abundance decreased by half on average, presumably in response to a combination of factors. The influence of legume crop area decreased with the degree of specialization of the aphid species to such crops. The effect of geographical variation was high even when controlling for environmental variables, suggesting that many other spatially structured processes act on aphid population characteristics. Multifactorial analyses helped to partition the effects of different global change drivers. Climate and land-use changes have strong effects on aphid populations, with important implications for future agriculture. Additionally, trait-based response variation could have major consequences at the community scale.

关键词： abundance climate warming degree of specialization land-use change legume aphids phenology

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Magnetic Characterization of Amphibolites from the Fomopéa Pluton(West Cameroon):Their Implication in the Pan-African Deformation of the Central African Fold Belt

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Acta Geologica Sinica(English Edition) 2012年第1期86卷 73-84页

作者： NJANKO Théophile FOZING Eric Martial KWéKAM maurice YAKEU SANDJO Angéline Flore NJONFANG Emmanuel Laboratory of Environmental Geology Department of Earth SciencesDschang University Laboratory of Geology ENS Yaounde I University

The Fomopea granitic pluton is emplaced in gnessic and amphibolitic basement. These gneissic and amphibolitic basement rocks are represented in the pluton＇s body as sub-rounded, elongated or stretched xenoliths. Amphibolitic xenoliths display testimonies of two main tectonic events namely：（i） El flattening deformation event characterized by a NW-SE to E-W foliation with a best pole at 246/57 and a mineral stretched lineation with a best line at 293/47; and （ii） E2 compressive event typified by （1） N-S to NNE-SSW steeply dipping foliation; （2） S-type flexion-fold indicating a sinistral shear movement. These amphibolite rocks indicate a magnetic susceptibility magnitude （Km） range from 418 ~SI to 90092 IISI for 87% of the stations showing a ferromagnetic behavior. K-T curves reveal the presence of Ti-poor magnetite as susceptibility mineral carrier. Magnetic foliation and lineation suggest that the N-S strike direction observed in the Bamendou amphibolite is, as pointed out elsewhere in the Central African Fold Belt, of paramount importance in the tectonic evaluation of the Fomopea area, since it has most likely acted as major deformation phase in the second tectonic event in the belt.

关键词： amphibolite anisotropy of magnetic susceptibility (AMS) Pan-African fold belt Cameroon

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