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Causes, effects and control of seasonal frost action in railways

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Research in Cold and Arid Regions 2013年第4期5卷 363-367页

作者： Antti Nurmikolu mika Silvast Railway Track Structures Tampere University of TechnologyTampere Finland Professor Railway Division Roadscanners OyTampere Finland Director

Seasonally cold climate and resulting frost action set great demands to railway track substructure in order to maintain Irack geomelry. Chal- lenges culminate on high-speed lines, where the tolerances for roughness are the tightest. Problems may result in highly increased Irack maintenance and need for temporary speed reslrictions. The causes of frost action can be associated with subsoil, subballast or ballast. The major concern in frost protection is to avoid the freezing of frost susceptible subsoil by using sufficient thickness of subballast and relying on non-fi＇ost-susctible subballast material. This paper provides an overview of the main research findings on the role of ballast, subballast and subsoil in frost acedon. In new comlruclion the material specificalions, design procedures and construction methods have been developed to ensure adequate performance of Irack subscatt, but special challenges exist in managing existing Wacks that were not designed for modem requirements. In order to perform cost-effective and sustainable track maintenance, it is necessary to recognize the problem areas and define the root-causes of problems. For locating the problem sections and defining the causes of defects, a sophisticated analysis based on integration of track geometry and ground penetrating radar （GPR） data has been developed and is summarized in this paper,

关键词： frost action railway Irack ballast subballast subsoil frost susceptibility ground peneWating radar, track geometry Irackmaintenance

俄乌战争中的网络行动(译文)--到目前为止的效果、限制和经验教训

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信息安全与通信保密 2023年第4期 38-45页

作者： Matthias Schulze mika Kerttunen 李祯静(译) 不详中国电子科学研究院北京100041 中国电科发展战略研究中心北京100041

在俄罗斯与乌克兰发生军事冲突一年后,有关战时网络行动效果的某些预测现在可以进行分析。网络行动对情报收集、颠覆和塑造信息领域有一定作用,但它们不能取代决定性的军事力量。俄罗斯此次网络活动主要集中在情报收集、数据破坏和对关... 详细信息

在俄罗斯与乌克兰发生军事冲突一年后,有关战时网络行动效果的某些预测现在可以进行分析。网络行动对情报收集、颠覆和塑造信息领域有一定作用,但它们不能取代决定性的军事力量。俄罗斯此次网络活动主要集中在情报收集、数据破坏和对关键基础设施的拒绝服务攻击上。俄罗斯利用网络和信息手段的方式,以及乌克兰设法避免或遏制攻击的方式,值得我们从中吸取经验。

关键词：网络行动信息战开源情报经验教训

Mobile Alert and Warning in the United States and Japan:Confronting the Challenges of International Harmonization

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International Journal of Disaster Risk Science 2021年第6期12卷 928-934页

作者： Hamilton Bean Ana Maria Cruz mika Shimizu Keri K.Stephens Matthew McGlone Sharon Strover Department of Communication University of ColoradoDenver.CO 80204USA Disaster Prevention Research Institute(DPRI).Kyoto University Kyoto 611-0011Japan Graduate School of Advanced Integrated Studies in Human Survivability Kyoto UniversityKyoto 606-8501Japan Department of Communication Studies The University of Texas at AustinAustinTX 78712USA School of Journalism and Media The University of Texas at AustinAustinTX 78712USA

A U.S.-Japan expert workshop on mobile alert and warning was held online 8–10 September *** by the Japan Foundation’s Center for Global Partnership(CGP)and responding to the Sendai Framework for Disaster Risk Reduction 2015–2030,the workshop compared *** Japanese mobile alert and warning contexts,systems,policies,and messages to investigate possibilities for international harmonization of mobile device-based early *** workshop’s sessions revealed two interrelated issues that repeatedly surfaced among workshop participants:culture and *** workshop illuminated several possibilities and problems confronting U.S.,Japanese,and global stakeholders as they develop,deploy,and seek to improve the effectiveness of mobile alert and warning systems and messages.

关键词： Alerts Disasters Warning Japan Mobile technology United States

Synthesis of novel adsorbent by intercalation of biopolymer in LDH for the removal of arsenic from synthetic and natural water

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Journal of Environmental Sciences 2020年第5期32卷 246-261页

作者： Hanen Bessaies Sidra Iftekhar Bhairavi Doshi Jamel Kheriji Mohamed Chaker Ncibi Varsha Srivastava mika Sillanpaa Bechir Hamrouni Laboratory of Desalination and Water Treatement LR19ES01 Faculty of Sciences of TunisTunis El Manar University2092El Manar ITunisia Department of Separation Science Lappeenranta-Lahti University of Technology(LUT)Sammonfeatu 12FI-50130MikkeliFinland International Water Research Institute MohammedⅥPolytechnic UniversityCity Ben Guerir 43150Morocco Department of Civil and Environmental Engineering Florida International UniversityMiamiFL 33174USA Department of Environmental Engineering University of Engineering and TechnologyTaxilaPakistan

This study focuses on the synthesis of nanocomposites named CCA and CZA that were prepared by the incorporation of cellulose(CL)in the Ca/Al and Zn/Al layered double hydroxide(LDH),*** materials were then used for the uptake of As(Ⅲ)and As(V)from aqueous *** of both nanocomposites(CCA and CZA)was done using FTIR and Raman analysis to identify the functional groups,N2 adsorption-desorption isotherms to determine the specific surface area and pore geometry and XPS analysis to obtain the surface atomic *** other characters were investigated using simultaneous TGA and DTA and elemental chemical analysis(CHNS/O).The crystallinity of the prepared nanocomposites was displayed by XRD ***,the sheet-like structure of the LDHs and the irregularity of surface morphology with porous structure were observed by TEM and SEM *** of maximum adsorption capacity was adjusted using different parameters including pH,contact time and adsorbent *** pseudo-second-order model was in good fitting with kinetics *** adsorption isotherm results showed that CZA exhibits better adsorption capacity for As(Ⅲ)than CCA and the Langmuir isotherm model described the data well for both *** studies illustrated the endothermic nature of CCA and exothermic nature on CZA,as well as the fact that the adsorption process is spontaneous.A real water sample collected from well located in Gabes(Tunisia),has also been *** obtained experimental results were confirmed that these sorbents are efficient for the treatment of hazardous toxic species such as.

关键词： Layered double hydroxide Adsorption Arsenic removal Kinetics Natural water treatment

Automating selective area electron diffraction phase identification using machine learning

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Journal of Materiomics 2024年第4期10卷 896-905页

作者： M.mika N.Tomczak C.Finney J.Carter A.Aitkaliyeva Nuclear Engineering Program in Department of Materials Science University of Florida100 Rhines HallGainesville32611FLUSA Department of Materials Science&Engineering Case Western Reserve University2111 Martin Luther King Jr DrCleveland44106OHUSA

Selective area electron diffraction(SAED)patterns can provide valuable insight into the structure of a ***,the manual identification of collected patterns can be a significant bottleneck in the overall phase classification *** this work,we utilize the recent advances in computer vision and machine learning(ML)to automate the indexing of SAED *** performance of six different ML algorithms is demonstrated using metallic plutonium-zirconium *** most successful approach trained a neural network(NN)to make a classification of the phase and zone axis,and then utilized a second NN to synthesize multiple independent predictions of different tilts in a single sample to make an overall phase *** results demonstrate that automated SAED phase identification using ML is a viable route to accelerate materials characterization.

关键词： Selective area electron diffraction Machine learning Phase identification Metallic fuels Pu alloys

Staying Moderately Active Benefits Our Brains

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新高考(英语进阶) 2017年第9期 34-35页

作者： mika

词数:475阅读难度:★★★☆☆建议阅读时间:5分钟Scientists studying Alzheimer’s have found that staying moderately active can lead to healthier brain functions in those at risk of developing the disease,potentially giving us another clue how to beat the *** particular the research looked at glucose metabolism,the process that gives brain cells the right amount of fuel,and that also happens to break down with the onset of Alzheimer’*** from the University of

关键词：阿兹海默症 Staying Moderately Active Benefits Our Brains

What Is a Kind of Feeling When Your Beauty Is Fading with Aging?

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新高考(英语进阶) 2017年第10期 34-35页

作者： mika

词数:512阅读难度:★★★☆☆建议阅读时间:6分钟How does it feel to once be extremely gorgeous and pretty,grow old,and now no one pays attention to you?I don’t know about"extremely gorgeous",but when I was younger I was often asked to model.l’m 53 now,and no one asks me to model ***’s *** is what it ***,I’d prefer the wrinkles go away.I’d love to be 110 pounds no matter what I eat again,and I do miss that long,blond,shiny

关键词： What Is a Kind of Feeling When Your Beauty Is Fading with Aging

Genomes Account for Your Marriage

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新高考(英语进阶) 2017年第4期 35-37页

作者： mika

词数:629阅读难度:建议阅读时间:7分钟Chances are,you’re going to marry someone a lot like *** intelligence,similar height,similar body weight.A new study of tens of thousands of married couples suggests that this isn’... 详细信息

关键词： Genomes Account for Your Marriage

Blocking Phone Alerts for just One Day can Change Your Habits for Years

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新高考(英语进阶) 2017年第11期 32-34页

作者： mika

词数:447阅读难度:★★★建议阅读时间:5分钟Almost half of the participants in a study who were asked to switch off their phone notifications for a day said it was still influencing their habits two years later-so maybe dealing with your phone addiction isn’t as difficult as you *** a day away from the pings and buzzes can make a difference,say the researchers behind the new *** also found participants felt less distracted

关键词： length Blocking Phone Alerts for just One Day can Change Your Habits for Years Phone 定语从句状语从句简单句