Discovering Semantic Mobility Pattern from Check-in Data

Author(s):  
Ji Yuan ◽  
Xudong Liu ◽  
Richong Zhang ◽  
Hailong Sun ◽  
Xiaohui Guo ◽  
...  
Keyword(s):  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Flavio De Angelis ◽  
Maura Pellegrini ◽  
Cristina Martínez-Labarga ◽  
Laura Anzivino ◽  
Gabriele Scorrano ◽  
...  

AbstractAs a means for investigating human mobility during late the Neolithic to the Copper Age in central and southern Italy, this study presents a novel dataset of enamel oxygen and carbon isotope values (δ18Oca and δ13Cca) from the carbonate fraction of biogenic apatite for one hundred and twenty-six individual teeth coming from two Neolithic and eight Copper Age communities. The measured δ18Oca values suggest a significant role of local sources in the water inputs to the body water, whereas δ13Cca values indicate food resources, principally based on C3 plants. Both δ13Cca and δ18Oca ranges vary substantially when samples are broken down into local populations. Statistically defined thresholds, accounting for intra-site variability, allow the identification of only a few outliers in the eight Copper Age communities, suggesting that sedentary lifestyle rather than extensive mobility characterized the investigated populations. This seems to be also typical of the two studied Neolithic communities. Overall, this research shows that the investigated periods in peninsular Italy differed in mobility pattern from the following Bronze Age communities from more northern areas.


Author(s):  
Xu Yajing ◽  
Li Gongfu ◽  
Xue Chao ◽  
Luo Angen ◽  
Song Yizhe

2008 ◽  
Vol 54 (11) ◽  
pp. 957-963 ◽  
Author(s):  
Dafinka I. Koleva ◽  
Ventsislava Y. Petrova ◽  
Anna V. Kujumdzieva

The enzymatic defence system in the 2 yeasts Kluyveromyces marxianus and Rhodotorula glutinis , differing in their mode of oxygen uptake and energy generation, was characterized and compared with the well-studied facultatively fermentative Crabtree-positive Saccharomyces cerevisiae strain. Twofold higher superoxide dismutase (SOD) and catalase activities were detected in K. marxianus and R. glutinis when cells were cultured on glucose. Further increases of 10%–15% in SOD activity and 30%–50% in catalase were measured in all studied yeasts strains after transfer to media containing ethanol. An evaluation of the ratio of Cu/Zn SOD / Mn SOD was performed as a measure of the oxidative metabolism. A 20% decrease was observed when the respiratory source of energy was ethanol, with the lowest ratio being observed for the oxidative type of K. marxianus yeasts. Electrophoretic analysis revealed that all tested strains possess active Cu/Zn and Mn SODs. A reverse electrophoretic mobility pattern of K. marxianus and R. glutinis SOD enzymes was observed in comparison with the same couple in S. cerevisiae. The investigation of electrophoretic profile of catalase enzymes showed that alongside their different taxonomic status and fermentative capacity, all tested strains possess 2 separate catalases. The role of antioxidant enzymes in preventing oxidant-induced cytotoxicity (treatment with hydrogen peroxide, paraquat, and menadione) was shown.


Sign in / Sign up

Export Citation Format

Share Document