scholarly journals Response of Tall Buildings to Weak, Long-distance Earthquakes

2015 ◽  
pp. 87-113
Author(s):  
J.M.W. Brownjohn ◽  
T-C. Pan
Keyword(s):  
Tall Buildings ◽  
Long Distance

Seismic hazard in Buenos Aires, Argentina: A preliminary study on the effects of long-distance earthquakes on tall buildings

2018 ◽  
Vol 47 (11) ◽  
pp. 2333-2339
Author(s):  
Raúl D. Bertero ◽  
Sebastián Vaquero ◽  
Juan M. Mussat ◽  
Agustín Bertero
Keyword(s):  
Seismic Hazard ◽  
Buenos Aires ◽  
Tall Buildings ◽  
Long Distance ◽  
Preliminary Study

scholarly journals Hybrid Urban Canyon Pedestrian Navigation Scheme Combined PDR, GNSS and Beacon Based on Smartphone

2019 ◽  
Vol 11 (18) ◽  
pp. 2174 ◽  
Author(s):  
Junhua Ye ◽  
Yaxin Li ◽  
Huan Luo ◽  
Jingxian Wang ◽  
Wu Chen ◽  
...  
Keyword(s):  
Smart Phone ◽  
Tall Buildings ◽  
Urban Canyon ◽  
Positioning Error ◽  
Fusion Algorithm ◽  
Long Distance ◽  
Filter Model ◽  
Fusion Procedure ◽  
Pedestrian Navigation ◽  
Navigation Scheme

This study presents a comprehensive urban canyon pedestrian navigation scheme. This scheme combines smart phone internal MEMS sensors, GNSS and beacon observations together. Heading estimation is generally a key issue of the PDR algorithm. We design an orientation fusion algorithm to improve smart phone heading using MEMS measurements. Static and kinematic tests are performed, superiority of the improved heading algorithm is verified. We also present different heading processing solutions for comparison and analysis. Heading bias increases with time due to error accumulation and model inaccuracy. Thus, we develop a related heading calibration method based on beacons. This method can help correct smart phone headings continuously to decrease cumulative error. In addition to PDR, we also use GNSS and beacon measurements to integrate a fusion location. In the fusion procedure, we design related algorithms to adjust or limit the use of these different type observations to constrain large jumps in our Kalman filter model, thereby making the solution stable. Navigation experiments are performed in the streets of Mong Kok and Wanchai, which are typically the most crowded areas of Hong Kong, with narrow streets and many pedestrians, vehicles and tall buildings. The first experiment uses the strategy PDR + GNSS + beacon, in east–west orientation street, in which 10 m positioning error is improved from 30 % (smart phone internal GNSS) to 80 % and in south–north orientation street, in which 15 m positioning error is improved from 20 % (smart phone internal GNSS) to 80 % . The second experiment performs two long-distance tests without any beacons, in which the fusion scheme also has significant improvement, that is, 10 m positioning error is improved from 38 % to 60 % .

Site-Dependent Building Response in Singapore to Long-Distance Sumatra Earthquakes

1997 ◽  
Vol 13 (3) ◽  
pp. 475-488 ◽  
Author(s):  
Tso-Chien Pan
Keyword(s):  
Tall Buildings ◽  
Long Distance ◽  
Quaternary Deposit ◽  
High Exposure ◽  
Highly Active ◽  
Geological Conditions ◽  
Measurement Results ◽  
Microtremor Measurement ◽  
City State ◽  
Sumatra Earthquakes

Singapore is a city state located in a low seismicity area with mild winds. The country is a classic example of low seismic hazard and high exposure scenario. It is about 400 km away from a highly active earthquake belt, the Sumatra subduction complex, where great earthquakes have occurred in the past. Twenty-seven earthquakes have been reportedly felt in Singapore since the British settlement in 1819. The frequency of these felt events seems to be rising with time as the country develops. The response of a building to long-distance earthquakes is dependent on the type of structural systems and the local geological conditions. Tall buildings founded on Quaternary deposit, i.e. the Kallang Formation, are particularly apt to respond to the long-distance Sumatra earthquakes. Microtremor measurement results correlate well with the geological conditions and give evidence to the phenomenon of site dependent building response in Singapore to the long-distance Sumatra earthquakes.

Response of tall buildings to weak long distance earthquakes

2001 ◽  
Vol 30 (5) ◽  
pp. 709-729 ◽  
Author(s):  
James Mark William Brownjohn ◽  
Tso Chien Pan
Keyword(s):  
Tall Buildings ◽  
Long Distance

The Fine Structure of Phloem Cells

1985 ◽  
Vol 43 ◽  
pp. 632-635
Author(s):  
James Cronshaw
Keyword(s):  
Structural Studies ◽  
High Concentration ◽  
Long Distance ◽  
Phloem Tissue ◽  
Sieve Elements ◽  
Long Distance Transport ◽  
P Protein ◽  
Companion Cells ◽  
Electron Microscopical ◽  
Distance Transport

Long distance transport in plants takes place in phloem tissue which has characteristic cells, the sieve elements. At maturity these cells have sieve areas in their end walls with specialized perforations. They are associated with companion cells, parenchyma cells, and in some species, with transfer cells. The protoplast of the functioning sieve element contains a high concentration of sugar, and consequently a high hydrostatic pressure, which makes it extremely difficult to fix mature sieve elements for electron microscopical observation without the formation of surge artifacts. Despite many structural studies which have attempted to prevent surge artifacts, several features of mature sieve elements, such as the distribution of P-protein and the nature of the contents of the sieve area pores, remain controversial.

Popliteal entrapment syndrome and age

VASA ◽  
2012 ◽  
Vol 41 (4) ◽  
pp. 262-268 ◽  
Author(s):  
Schweizer ◽  
Hügli ◽  
Koella ◽  
Jeanneret
Keyword(s):  
Risk Factors ◽  
Leg Pain ◽  
Walking Distance ◽  
Therapeutic Approaches ◽  
Long Distance ◽  
Entrapment Syndrome ◽  
Long Distance Running ◽  
Popliteal Entrapment ◽  
Popliteal Entrapment Syndrome ◽  
Atherosclerotic Risk Factors

On the occasion of diagnosing a popliteal entrapment syndrome in a 59-year old man with no cardiovascular risk factors, who developed acute ischemic leg pain during long distance running, we give an overview on this entity with emphasis on patients’age. The different types of the popliteal artery compression syndrome are summarized. The diagnostic and therapeutic approaches are discussed. The most important clinical sign of a popliteal entrapment syndrome is the lack of atherosclerotic risk factors in patients with limited walking distance. Not only in young athletes but also in patients more than 50 years old the popliteal entrapment syndrome has to be taken into account.

Attachment Styles, Physical Proximity, and Relational Satisfaction

2014 ◽  
Vol 4 (2) ◽  
pp. 106-112
Author(s):  
Anita Shrivastava ◽  
Andrea Burianova
Keyword(s):  
Attachment Styles ◽  
Romantic Relationship ◽  
Distinct Type ◽  
Relational Satisfaction ◽  
Long Distance ◽  
Avoidant Attachment ◽  
Geographic Separation ◽  
Relationship Of ◽  
Attachment Dimensions

This study aimed to explore the relationships between attachment styles, proximity, and relational satisfaction. This was achieved by assessing a distinct type of long distance romantic relationship of flying crews, compared with proximal (non-flying crew) romantic relationships. The responses of 139 expatriate professionals revealed significant associations between proximity and anxious and avoidant attachment dimensions. The role of the avoidant dimension in comparison with that of the anxious dimension was found to be a significant predictor of relational satisfaction. This study contributes significantly toward addressing the role of proximity and attachment in relational satisfaction in a new context of geographic separation.

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