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安徽女山橄榄岩包体的氧同位素比值和微量元素组成:地幔交代作用 被引量:12
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作者 于慧敏 夏群科 +1 位作者 Dallai L Chazot G 《岩石学报》 SCIE EI CAS CSCD 北大核心 2005年第3期829-838,共10页
本文的研究对象是9个来自安徽女山新生代玄武岩的橄榄岩包体,利用激光氟化技术系统分析了橄榄石、单斜辉石和斜方辉石的氧同位素比值;利用LA-ICPMS技术分析了单斜辉石的微量元素组成。结果显示,女山橄榄岩存在辉石与橄榄石之间的氧同位... 本文的研究对象是9个来自安徽女山新生代玄武岩的橄榄岩包体,利用激光氟化技术系统分析了橄榄石、单斜辉石和斜方辉石的氧同位素比值;利用LA-ICPMS技术分析了单斜辉石的微量元素组成。结果显示,女山橄榄岩存在辉石与橄榄石之间的氧同位素不平衡分馏现象,其中△Cpx-Ol18O(=δ18OCpx-δ18OOl)出现低至-0.5‰的负值;含角闪石包体中的单斜辉石明显富集大离子亲石元素(LILE,如Sr、Th、LREE)和亏损高场强元素(HFSE,如Nb、Zr、Ti)。氧同位素的数据表明,女山上地幔曾经经历过俯冲洋壳流体参与的交代作用,根据单斜辉石和橄榄石之间氧同位素分馏值△Cpx-Ol18O与包体形成深度之间的负相关性,提出了一个“上升+缓冲”的流体交代模型。虽然微量元素特征也表明女山上地幔受到过地壳流体的影响,但是氧同位素的不平衡分馏和LILE的富集/HFSE的亏损并不是同步的,对这种现象的可能解释是:引起氧同位素不平衡分馏的交代作用和造成女山单斜辉石微量元素特征的交代作用不是同一期的,即女山上地幔曾经发生过至少2次交代事件。 展开更多
关键词 氧同位素 微量元素 橄榄岩 地幔交代作用 女山
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Big Data Research in Italy: A Perspective 被引量:1
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作者 Sonia Bergamaschi Emanuele Carlini +9 位作者 Michelangelo Ceci Barbara Furletti Fosca Giannotti Donato Malerba Mario Mezzanzanica Anna Monreale Gabriella Pasi Dino Pedreschi Raffele Perego Salvatore Ruggieri 《Engineering》 SCIE EI 2016年第2期163-170,共8页
这篇文章的目的在于综述在大数据背景下一些意大利大学正在从事的研究项目。本文不求面面俱到,目的是提供从意大利不同领域收集到的有关大数据管理方面的问题的实际解决方案。
关键词 意大利 应用程序
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大数据研究在意大利的远景
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作者 Sonia Bergamaschi Emanuele Carlini +9 位作者 Michelangelo Ceci Barbara Furletti Fosca Giannotti Donato Malerba Mario Mezzanzanica Anna Monreale Gabriella Pasi Dino Pedreschi Raffele Perego Salvatore Ruggieri 《Engineering》 SCIE EI CAS 2016年第2期176-184,共9页
这篇文章的目的在于综述在大数据背景下一些意大利大学正在从事的研究项目。本文不求面面俱到,目的是提供从意大利不同领域收集到的有关大数据管理方面的问题的实际解决方案。
关键词 大数据 智慧城市 能源 工作机会 隐私
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Nutritional and physical improvements in older adults through the DOREMI remote coaching approach:a real-world study
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作者 Federico Vozzi Filippo Palumbo +8 位作者 Erina Ferro Karl Kreiner Franca Giugni Rachel Dutton Shirley Hall Daniele Musian Marina Parolini Patrizia Riso Oberdan Parodi 《Intelligent Medicine》 2022年第4期181-192,共12页
Background Malnutrition(excess or defect)and sedentariness act as an accelerator in the older people frailty process.A systemic solution has been developed to engage older people in a healthier lifestyle using serious... Background Malnutrition(excess or defect)and sedentariness act as an accelerator in the older people frailty process.A systemic solution has been developed to engage older people in a healthier lifestyle using serious games and food monitoring.The study aimed to evaluate protocol influence on variables related to unhealthy behaviors improving dietary habits through a remote nutritional coaching approach and stimulating the population to increase physical activity through Exergames.Methods Thirty-two subjects(25 Treatments and 7 Controls,aging 65-80 years),of which 15(11 Treatments and 4 Controls)living in the UK(ACCORD and ExtraCare Villages placed in Shenley Wood(Milton Keynes),St.Crispin(Northampton),and Showell Court(Wolverhampton))and 17(14 Treatments and 3 Controls)in Italy(Genoa,Liguria),were recruited and characterized in terms of nutritional status,physical,somatometric,hemodynamic and biochemical measurements,and body composition.Participants were stimulated to adopt the Mediterranean dietary pattern,by a food diary diet-app,and perform regular physical activity,by the Exergame app,for three months.At the end of the trial,users underwent the same test battery.Data were tested for normality of distribution by the Shapiro-Wilk test.Comparisons between groups were performed at baseline by unpaired Student’s t-test for continuous variables,chi-square test,or Fisher’s exact test for categorical variables.Analysis of Variance(ANOVA)for repeated measures was used to analyze the significance of changes over time between groups.Results At the end of the trial,significant reductions of systolic(15 mmHg,P=0.001),diastolic(5 mmHg,P=0.025),mean(10 mmHg,P=0.001)blood pressure,and rate-pressure product(RPP)(1,105 mmHg∗bpm,P=0.017)values were observed in DOREMI users.A trend of improvement of physical performance by the short physical performance battery(SPPB)was observed for balance and walk subtests.A significant decrease(0.91 kg,P=0.043)in Body Mass Index(BMI)was observed in overweight subjects(BMI>25 kg/m 2)after DOREMI intervention in the entire population.The Mini Nutritional Assessment(MNA)score(1,P=0.004)significantly increased after intervention,while waist measure(3 cm,P<0.001)significantly decreased in the DOREMI users.A reduction in glycated hemoglobin(Hb)was registered(0.20%,P=0.018)in the DOREMI UK users.Conclusions Improvement of healthy behavior by technological tools,providing feedback between user and remote coach and increasing user’s motivation,appears potentially effective.This information and communica-tion technologies(ICT)approach offers an innovative solution to stimulate healthy eating and lifestyle behaviors,supporting clinicians in patient management. 展开更多
关键词 NUTRITION Physical activity ELDERLY Healthy aging Information and communication technologies
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