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An intercontinental comparison of insect seed predation between introduced and native oaks

Integrative Zoology 2022年第2期17卷 217-230页

作者： Xin SUN Haidong LI Aibing ZHANG AnikóHIRka györgy csóka Ian S.PEARSE Marcel HOLYOAK Zhishu XIAO State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture Institute of ZoologyChinese Academy of SciencesBeijingChina Institute of Physical Science and Information Technology Anhui University111 Jiulong RoadHefeiAnhuiChina University of Chinese Academy of Sciences BeijingChina College of Life Sciences Capital Normal UniversityBeijingChina Department of Forest Protection NARIC Forest Research InstituteHungary U.S.Geological Survey Fort Collins Science CenterFort CollinsCOUSA Department of Environmental Science and Policy University of CaliforniaDavisCAUSA

Novel interactions between introduced oaks and their natural enemies across different continents provide an opportunity to test the enemy release hypothesis(ERH)at local and global *** on the ERH,we assessed the impacts of native seed-feeding insects on introduced and native oaks within and among *** combined a common-garden experiment in China and biogeographic literature surveys to measure seed predation by insects and the proportion of acorn embryos surviving after insect infestation among 4 oak species with different geographical origins:Quercus mongolica origin from China,*** and *** from Europe,and *** from North *** supporting the ERH,oaks in introduced continents escaped seed predation compared to those in native continents and compared to other native oaks in introduced ***-garden comparisons showed that total acorn infestation rate of introduced ***(section Lobatae)was considerably lower than that of native oaks(section Quercus)in China and Europe,likely because of the differences in seed traits associated with different oak *** surveys showed that seed predation of introduced oaks was lower in the introduced continent than in the native *** survival was higher in introduced *** than native oaks in China and ***,insect seed predation of recently introduced *** in China was similar to that in Europe,which is not consistent with the *** results suggest that reduced acorn attack by native insects and higher embryo survival after acorn damage could increase the establishment success or invasion risk of introduced oaks in non-native continents.

关键词： acorn performance common garden plant-herbivore interactions species introduction the enemy release hypothesis

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Almost Everywhere Convergence of Fejér Means of L^1 Functions on Rarely Unbounded Vilenkin Groups

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Acta Mathematica Sinica,English Series 2007年第12期23卷 2269-2294页

作者： gyrgy GT College of Nyíregyháza Institute of Mathematics and Computer Science

A highly celebrated problem in dyadic harmonic analysis is the pointwise convergence of the Fejér （or （C, 1）） means of functions on unbounded Vilenkin groups. There are several papers of the author of this paper concerning this. That is, we know the a.e. convergence σnf → f （n → ∞） for functions f ∈ L^p, where p 〉 1 （Journal of Approximation Theory, 101（1）, 1-36, （1999）） and also the a.e. convergence σMnf → f （n → ∞） for functions f ∈ L^1 （Journal of Approximation Theory, 124（1）, 25-43, （2003））. The aim of this paper is to prove the a.e. relation limn→∞ σnf = f for each integrable function f on any rarely unbounded Vilenkin group. The concept of the rarely unbounded Vilenkin group is discussed in the paper. Basically, it means that the generating sequence m may be an unbounded one, but its ＂big elements＂ are not ＂too dense＂.

关键词： rarely unbounded Vilenkin groups Vilenkin series Fejér means a.e. convergence

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Almost Everywhere Convergence of Sequences of Cesàro and Riesz Means of Integrable Functions with Respect to the Multidimensional Walsh System

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Acta Mathematica Sinica,English Series 2014年第2期30卷 311-322页

作者： gyrgy GT Institute of Mathematics and Computer Science College of Nyíregyhza

The aim of this paper is to prove the *** of sequences of the Cesaro and Riesz means of the Walsh–Fourier series of d variable integrable *** is,let a=（a1,...,ad）：N→Nd（d∈P）such that aj（n＋1）≥δsupk≤n aj（k）（j=1,...,d,n∈N）for someδ〉0 and a1（＋∞）=···=ad（＋∞）=＋∞.Then,for each integrable function f∈L1（Id）,we have the *** for the Cesaro means limn→∞σαa（n）f=f and for the Riesz means limn→∞σα,γa（n）f=f for any 0〈αj≤1≤γj（j=1,...,d）.A straightforward consequence of our result is the so-called cone restricted *** of the multidimensional Cesaro and Riesz means of integrable functions,which was proved earlier by Weisz.

关键词： Walsh system d-dimensional Fejer and Riesz means subsequence almost everywhereconvergence

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On the Divergence of N(?)rlund Logarithmic Means of Walsh-Fourier Series

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Acta Mathematica Sinica,English Series 2009年第6期25卷 903-916页

作者： gyrgy GAT Ushangi GOGINAVA Institute of Mathematics and Computer Science College of Nyíregyháza Department of Mechanics and Mathematics Tbilisi State University

It is well known in the literature that the logarithmic means 1/logn ^n-1∑k=1 Sk（f）/k of Walsh or trigonometric Fourier series converge a.e. to the function for each integrable function on the unit interval. This is not the case if we take the partial sums. In this paper we prove that the behavior of the so-called NSrlund logarithmic means 1/logn ^n-1∑k=1 Sk（f）/n-k is closer to the properties of partial sums in this point of view.

关键词： Walsh function Norlund logarithmic means a.e. divergence.

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Convergence in L^p-norm of Fourier Series on the Complete Product of Quaternion Groups with Bounded Orders

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Acta Mathematica Sinica,English Series 2014年第9期30卷 1566-1578页

作者： gyrgy GAT Rodolfo TOLEDO College of Nyiregyhza Inst.of Math.and Comp.Sci.Nyiregyhza

A well-known result for Vilenkin systems is the fact that for all 1 〈 p 〈 oc the n-th partial sums of Fourier series of all functions in the space Lp converge to the function in LP-norm. This statement can not be generalized to any representative product system on the complete product of finite non-abelian groups, but even then it is true for the complete product of quaternion groups with bounded orders and monomial representative product system ordered in a specific way.

关键词： Fourier analysis Walsh-Paley system representative product systems complete product of quaternion groups convergence in norm

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Pointwise Convergence of Cone-like Restricted Two-dimensional Fejér Means of Walsh-Fourier Series

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Acta Mathematica Sinica,English Series 2010年第12期26卷 2295-2304页

作者： gyrgy GT Kroly NAgy Institute of Mathematics and Computer Sciences College of Nyíregyhza

For the two-dimensional Walsh system, Gat and Weisz proved the a.e. convergence of Fejer means σnf of integrable functions, where the set of indices is inside a positive cone around the identical function, that is, β^-1≤n1/n2 ≤β is provided with some fixed parameter ~ 〉 1. In this paper we generalize the result of Gat and Weisz. We not only generalize this theorem, but give a necessary and sufficient condition for cone-like sets in order to preserve this convergence property.

关键词： Walsh group Walsh system pointwise convergence Fejer means

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Factors Influencing Cities’ Publishing Efficiency

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Journal of Data and Information Science 2018年第3期3卷 43-80页

作者： csomós györgy Department of Civil Engineering University of Debrecen

Purpose:Recently,a vast number of scientific publications have been produced in cities in emerging *** has long been observed that the publication output of Beijing has exceeded that of any other city in the world,including such leading centres of science as Boston,New York,London,Paris,and *** have suggested that,instead of focusing on cities'total publication output,the quality of the output in terms of the number of highly cited papers should be ***,in the period from 2014 to 2016,Beijing produced as many highly cited papers as Boston,London,or New *** this paper,another method is proposed to measure cities'publishing performance by focusing on cities'publishing efficiency(i.e.,the ratio of highly cited articles to all articles produced in that city).Design/methodology/approach:First,554 cities are ranked based on their publishing efficiency,then some general factors influencing cities'publishing efficiency are *** general factors examined in this paper are as follows:the linguistic environment of cities,cities'economic development level,the location of excellent organisations,cities'international collaboration patterns,and their scientific field ***,the paper examines the fundamental differences between the general factors influencing the publishing efficiency of the top 100 most efficient cities and the bottom 100 least efficient ***:Based on the research results,the conclusion can be drawn that a city's publishing efficiency will be high if meets the following general conditions:it is in a country in the Anglosphere-Core;it is in a high-income country;it is home to top-ranked universities and/or world-renowned research institutions;researchers affiliated with that city most intensely collaborate with researchers affiliated with cities in the United States,Germany,England,France,Canada,Australia,and Italy;and the most productive scientific disciplines of highly cited articles are publi

关键词： Cities Publishing efficiency Spatial scientometrics Highly cited articles Web of Science

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Metabolic consequences of Helicobacter pylori infection and eradication

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World Journal of Gastroenterology 2014年第18期20卷 5226-5234页

作者： gy?rgy Miklós Buzás Department of Gastroenterology Ferencváros Health Centre1095 BudapestHungary

Helicobacter pylori(***)is still the most prevalent infection of the *** of the stomach by this agent will invariably induce chronic gastritis which is a low-grade inflammatory state leading to local complications(peptic ulcer,gastric cancer,lymphoma)and remote *** *** does not enter circulation,these extragastric manifestations are probably mediated by the cytokines and acute phase proteins produced by the inflammed *** epidemiologic link between the *** infection and metabolic changes is inconstant and *** delay was described mainly in low-income regions with high prevalence of the infection,where probably other nutritional and social factors contribute to *** timely eradication of the infection will lead to a more healthy development of the young population,along with preventing peptic ulcers and gastric cancer An increase of total,low density lipoprotein and high density liporotein cholesterol levels in some infected people creates an atherogenic lipid profile which could promote atherosclerosis with its complications,myocardial infarction,stroke and peripheral vascular *** designed and adequately powered long-term studies are required to see whether eradication of the infection will prevent these *** case of glucose metabolism,the most consistent association was found between *** and insulin resistance:again,proof that eradication prevents this common metabolic disturbance is *** results of eradication with standard regimens in diabetics are significantly worse than in non-diabetic patients,thus,more active regimens must be found to obtain better *** eradication itself led to an increase of body mass index and cholesterol levels in some populations,while in others no such changes were *** of the metabolic consequences of *** infection must be clarified in the future.

关键词： Diabetes mellitus Cytokines Glucose homeostasis Growth Helicobacter pylori Interleukins Lipid metabolism Metabolic syndrome

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First-line eradication of Helicobacter pylori:Are the standard triple therapies obsolete? A different perspective

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World Journal of Gastroenterology 2010年第31期16卷 3865-3870页

作者： gyrgy Miklós Buzás Department of Gastroenterology Fe-rencváros Health Service Non-Profit Ltd.

Studies concerning the eradication of Helicobacter pylori have resulted in a proliferation of meta-analyses. To date, there are 303 meta-analyses cited in PubMed, 113 dealing with the therapy of the infection. A chronological analysis of the results of meta-analyses performed between 1998 and 2010 shows that first-line standard triple therapies achieved eradication rates on an intention-to-treat basis of around 80%; prolonging treatment to 14, but not 10 d should improve the results. The proton pump inhibitors have a similar efficiency, and giving a double dose is more efficient than the standard doses of these drugs. Triple and quadruple therapies proved to be equivalent. Based on meta-analytical data, the decrease in efficiency over time cannot be substantiated: eradication rates < 80% followed from the introduction of triple therapies. As alternatives, ranitidine bismuth citrate-, levofloxacinor furazolidone-based therapies were shown to obtain the same eradication rates as standard triple regimens. Sequential therapies and quadruple non-bismuth-based therapies were superior to standard triple therapies but their use is limited to certain countries. In the author's opinion, and from a meta-analytical viewpoint, standard triple therapies cannot yet be considered obsolete. Furthermore, noninferiority trials are proposed for the future, including assessment of local contemporary antimicrobial resistance profi les and the CagA and CYP2C19 status of the enrolled patients.

关键词： Antibiotics Eradication Helicobacter pylori Meta-analysis

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Portal Hypertension in Nonalcoholic Fatty Liver Disease: Challenges and Paradigms

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Journal of Clinical and Translational Hepatology 2023年第5期11卷 1201-1211页

作者： Emilie K.Mitten Piero Portincasa györgy Baffy Division of Gastroenterology Department of MedicineMassachusetts General HospitalHarvard Medical SchoolBostonMAUSA Division of Internal Medicine and Department of Precision and Regenerative Medicine and Ionian Area University‘Aldo Moro’Medical SchoolBariItaly Division of Gastroenterology Hepatology and EndoscopyDepartment of MedicineBrigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA Section of Gastroenterology Department of MedicineVA Boston Healthcare SystemBostonMAUSA

Portal hypertension in cirrhosis is defined as an increase in the portal pressure gradient(PPG)between the portal and hepatic veins and is traditionally estimated by the hepatic venous pressure gradient(HVPG),which is the difference in pressure between the free-floating and wedged positions of a balloon catheter in the hepatic *** convention,􀀫HVPG≥10mmHg indicates clinically significant portal hypertension,which is associated with adverse clinical *** fatty liver disease(NAFLD)is a common disorder with a heterogeneous clinical course,which includes the development of portal *** is increasing evidence that portal hypertension in NAFLD deserves special ***,elevated PPG often precedes fibrosis in NAFLD,suggesting a bidirectional relationship between these pathological ***,HVPG underestimates PPG in NAFLD,suggesting that portal hypertension is more prevalent in this condition than currently ***,cellular mechanoresponses generated early in the pathogenesis of NAFLD provide a mechanistic explanation for the pressurefibrosis ***,a better understanding of liver mechanobiology in NAFLD may aid in the development of novel pharmaceutical targets for prevention and management of this disease.

关键词： Sinusoidal microcirculation Hepatic vascular resistance Portal venous pressure Hepatic venous pressure gradient Mechanobiology Mechanotransduction

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