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Finite Degree Holomorphic Covers of Compact Riemann Surfaces

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Acta Mathematica Sinica,English Series 2007年第1期23卷 89-94页

作者： jouni PARKKONEN Vesa RUUSKA Department of Mathematics and Statistics P.O.Box 35 40014 University of JyvskylFinland Department of Physics P.O.Box 3540014 University of JyvskylFinland

A conjecture of Ehrenpreis states that any two compact Riemann surfaces of genus at least two have finite degree unbranched holomorphic covers that are arbitrarily close to each other in moduli space. Here we prove a weaker result where certain branched covers associated with arithmetic Riemann surfaces are allowed, and investigate the connection of our result with the original conjecture.

关键词： Riemann surfaces covering maps quasiconformal maps

Survival of transplanted nests of the red wood ant Formica aquilonia （Hymenoptera： Formicidae）： The effects of intraspecific competition and forest clear-cutting

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Insect Science 2014年第4期21卷 486-492页

作者： jouni Sorvari Esa Huhta Harri Hakkarainen 1 Section of Ecology Department of Biology FI-20014 University of Turku Finland Department of Environmental Science University of Eastern Finland P.O. Box 1627 FI-70211 Kuopio Finland Finnish Forest Research Institute Rovaniemi Research Unit P.O. Box 16 FI-96301 Rovaniemi Finland

The fitness and survival of ant colonies depend on the resources near their nests. These resources may be limited due to poor habitat quality or by intra- and interspecific competitions, which in extreme cases may cause the ant colony to perish. We tested the effect of intraspecific competition and habitat degradation （forest clear-cutting） on colony survival by transplanting 26 nests of the red wood ant （Formica aquilonia Yarrow, 1955） in 26 different forest areas that contained 0-11 conspecific alien nests per hectare. F. aquilonia is highly dependent on canopy-dwelling aphids, thus the removal of trees should cause food limitation. During the course of the 4-year experiment, 9 of the forests were partially clear- cut. We found that while forest clear-cutting significantly decreased the colonies＇ survival, intraspecific competition did not. As a highly polygynous and polydomous species, E aquilonia seems to tolerate the presence of alien conspecific colonies to a certain extent.

关键词： colony survival habitat degradation polydomy red wood ants relocationexperiment

Sustainable earth observations for the Arctic,the Antarctic and the high-altitude mountain cold regions

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International Journal of Digital Earth 2019年第8期12卷 858-859页

作者： jouni Pulliainen Bin Cheng Yubao Qiu Arctic Research Center Finnish Meteorological Institute Finnish Meteorological Institute Institute of Remote Sensing and Digital Earth Chinese Academic of Science

The Arctic,the Antarctic as well as the Qinghai-Tibet Plateau(QTP)are cold regions on Earth where snow and ice dominate the local environment and impact the global climate via several strong feedback *** observations and information service for those cold regions are vital for the societal benefits,and support from the science to policy making(Qiu et al.2016).Earth cold regions exhibit strong sensitivity to global climate change and are thus some of the most fragile regions in terms of global ecology(Pulliainen et al.2017).Due to these inherent similarities,the Qinghai-Tibet Plateau area has been termed as the‘Third Pole’,which is experiencing profound environmental changes.

关键词： Arctic Antarctic Earth

Using Statistical Downscaling to Quantify the GCM-Related Uncertainty in Regional Climate Change Scenarios: A Case Study of Swedish Precipitation

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Advances in Atmospheric Sciences 2006年第1期23卷 54-60页

作者： Deliang CHEN Christine ACHBERGER jouni R■IS■NEN Cecilia HELLSTRM Earth Sciences Centre Gothenburg UniversityGothenburgSweden Laboratory for Climate Studies/National Climate CenterChina Meteorological AdministrationBeijingChina Earth Sciences Centre Gothenburg UniversityGothenburgSweden Department of Atmospheric Sciences University of HelsinkiFinland

There are a number of sources of uncertainty in regional climate change scenarios. When statistical downscaling is used to obtain regional climate change scenarios, the uncertainty may originate from the uncertainties in the global climate models used, the skill of the statistical model, and the forcing scenarios applied to the global climate model. The uncertainty associated with global climate models can be evaluated by examining the differences in the predictors and in the downscaled climate change scenarios based on a set of different global climate models. When standardized global climate model simulations such as the second phase of the Coupled Model Intercomparison Project （CMIP2） are used, the difference in the downscaled variables mainly reflects differences in the climate models and the natural variability in the simulated climates. It is proposed that the spread of the estimates can be taken as a measure of the uncertainty associated with global climate models. The proposed method is applied to the estimation of global-climate-model-related uncertainty in regional precipitation change scenarios in Sweden. Results from statistical downscaling based on 17 global climate models show that there is an overall increase in annual precipitation all over Sweden although a considerable spread of the changes in the precipitation exists. The general increase can be attributed to the increased large-scale precipitation and the enhanced westerly wind. The estimated uncertainty is nearly independent of region. However, there is a seasonal dependence. The estimates for winter show the highest level of confidence, while the estimates for summer show the least.

关键词： Statistical downscaling global climate model climate change scenario uncertainty

Annual performance analysis of different maximum power point tracking techniques used in photovoltaic systems

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Protection and Control of Modern Power Systems 2019年第1期4卷 183-192页

作者： Y.Chaibi A.Allouhi M.Salhi A.El-jouni 2EMI team ENSAMMoulay Ismail University50500B.P 15290 El MansourMeknesMorocco Ecole Supérieure de Technologie de Fès U.S.M.B.ARoute d’ImouzzerBP 2427FezMorocco Physics Department of the CRMEF TangierMorocco

This paper presents an annual performance evaluation of three maximum power point tracking (MPPT) methods. The used MPPT techniques (Perturb and Observe, Incremental Inductance and Sliding mode) are evaluated under an annual data of atmospheric conditions of the target site. The main contribution of this work is to consider real fluctuation conditions of solar irradiations, ambient temperatures and wind velocities. It was found that the Sliding mode provides higher energy yields independently of the period. Compared to the basic P&O and the IC techniques, sliding mode has the potential of generating up to 8.18% more electrical energy than other techniques.

关键词： Photovoltaic systems Maximum power point tracking(MPPT) Annual performance

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芬兰教育VS中国教育这些不同值得我们反思

A prospective cancer chemo-immunotherapy approach mediated by synergistic CD326 targeted porous silicon nanovectors

2019年

主讲人： jouni Kangasniemi

本期节目的嘉宾是来自芬兰文化与教育部国际司的处长jouni Kangasniemi先生，在互动访谈中，他将和大家分享芬兰教育体系的特点：授人以渔，轻松灵活。给学生指点迷津，给教育指明道路。欢迎收看！

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来源：爱迪科森网上报告厅评论

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Nano Research 2015年第5期8卷 1505-1521页

作者： Mohammad-Ali Shahbazi Neha Shrestha Ermei Makila Francisca Araujo Alexandra Correia Tomas Ramos Bruno Sarmento Jarno Salonen jouni Hirvonen Helder A. Santos Division of Pharmaceutical Chemistry and Technology Faculty of Pharmacy University ofHelsinki FI-00014 Helsinki Finland Laboratory of Industrial Physics Departmen t of Physics and Astronomy University of Turku FI-20014 Turku Finland INEB - Instituto de Engenharia Biomedica NewTherapies Group Universidade do Porto Rua do Campo Alegre 823 4150-180 Porto Portuga ICBAS - Instituto Ciencias Biomedicas Abel Salazar University of Porto Rua de Jorge Viterbo Ferreira 4050-313 Porto Portugal Faculty of Pharmacy University of Coimbra 3000-548 Coimbra Portugal IINFACTS - Instituto de Investigacao e Formacao Avancada em Ciencias e Tecnologias da Saude Instituto Superior de Ciencias da Saude-Norte Department of Pharmaceutical Sciences CESPU Rua Central de Gandra 4585-116 Gandra Portugal

Combination therapy via nanoparticulate systems has already been proposed as a synergistic approach for cancer treatment. Herein, undecylenic acid modified thermally hydrocarbonized porous silicon nanoparticles （UnTHCPSi NPs） loaded with sorafenib and surface-biofunctionalized with anti-CD326 antibody （Ab） were developed for cancer chemo-immunotherapy in MCF-7 and MDA-MB-231 breast cancer cells. The cytocompatibility study showed no significant toxicity for the bare and antibody-conjugated UnTHCPSi （Un-Ab） NPs at concentrations lower than 200 μg·mL^-1. Compared to the bare UnTHCPSi, Un-Ab NPs loaded with sorafenib reduced the premature drug release in plasma, increasing the probability of proper drug targeting. In addition, high cellular interaction and subsequent internalization of the Un-Ab NPs into the cells expressing CD326 antigen demonstrated the possibility of improving antigen-mediated endocytosis via CD326 targeting. While an in vitro antitumor study revealed a higher inhibitory effect of the sorafenib-loaded Un-Ab NPs compared to the drug-loaded UnTHCPSi NPs in the CD326 positive MCF-7 cells, there was no difference in the anti-proliferation impact of both the abovementioned NPs in the CD326 negative MDA-MB-231 cells, suggesting CD326 as an appropriate receptor for Ab-mediated drug delivery. It was also shown that the anti-CD326 Ab can act as an immunotherapeutic agent by inducing antibody dependent cellular cytotoxicity and enhancing the interaction of effector immune and cancer cells for subsequent phagocytosis and cytokine secretion. Hence, the developed nanovectors can be applied for simultaneous tumor-selective drug targeting and immunotherapy.

关键词： CD326 antibody porous silicon nanopartides chemo-immunotherapy breast cancer drug targeting

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改善制浆造纸厂污水处理结果的诸多机遇

中华纸业 2011年第16期32卷 18-19页

作者： jouni Starck

介绍了芬兰造纸工业废水处理的现状,并对芬兰造纸工厂采用的废水处理技术进行了简述,对未来造纸厂应选择采用的技术发展趋势进行了介绍。

关键词：芬兰污水处理现状发展趋势

On Assessment of Initial Cracks for RI-ISI Analysis Purposes

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材料科学与工程（中英文B版） 2011年第3期1卷 296-307页

作者： Otso Cronvall Mainnisto Ilkka Alhainen jouni VTT Technical Research Centre of Finland Espoo 02044 Finland

The assessment of initial cracks for Risk Informed In-Service Inspection (RI-ISI) analyses of Nuclear Power Plant (NPP) piping systems is considered here. In RI-ISI analyses piping component specific risks are assessed based on estimated failure and consequence potentials, and typical analysed locations are welds. In general there exist two main approaches for assessment of piping failure potential in current relevant RI-ISI procedures: qualitative and quantitative. Here discussion concerning assessment of initial cracks connects primarily to the latter approach. Estimates of initial crack sizes are among the most influential input parameters in terms of RI-ISI analysis response. Of the quantitative analysis approaches structural reliability procedures can best capture the relative piping component failure potential/probability differences caused by component specific differences in physical characteristics, loading conditions and inspection histories. The foremost of these procedures for piping components is probabilistic fracture mechanics (PFM). The initial crack sizes are part of the needed input data in the PFM analyses. Two developed approaches to recursively calculate estimates for initial cracks are covered here. According to application results by decreasing the average size of initial cracks from 1.0 mm to 0.3 mm leads to approximately 100 times smaller yearly pipe component failure probabilities.

关键词：风险评估 ISI 裂缝概率断裂力学管道系统故障概率定量分析方法裂纹尺寸