Changes in Wetland Landscape Pattern and Its Driving Forces of Binhai New Area of Tianjin City in the Past Three Decades

2010 ◽  
Vol 12 (3) ◽  
pp. 436-443 ◽  
Author(s):  
Weiqing MENG ◽  
Hongyuan LI ◽  
Cui HAO ◽  
Xunqiang MO
2018 ◽  
Vol 38 (12) ◽  
Author(s):  
吕金霞 LÜ Jinxia ◽  
蒋卫国 JIANG Weiguo ◽  
王文杰 WANG Wenjie ◽  
陈坤 CHEN Kun ◽  
邓越 DENG Yue ◽  
...  

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1956
Author(s):  
Yang Yao ◽  
Sen Zhang ◽  
Yuqing Shi ◽  
Mengqi Xu ◽  
Jiaquan Zhang ◽  
...  

Rapid urbanization influences the landscape pattern of impervious surfaces, and potentially affects surface water quality. Using ArcGIS and Fragstats, this study analyzed the temporal change of the landscape pattern of impervious surfaces in Shanghai over the past 45 years, and its driving forces and impact on water quality were also analyzed. The results show that both low and high impervious surfaces showed different degrees of expansion, and as a result, the pervious surfaces and water area reduced by 40.1% and 13.8%, respectively. It proves that the fragmentation and diversity of impervious surfaces in Shanghai notably increased in the past decades, and especially the low and high impervious surfaces show substantial changes. The primary driving forces of the landscape pattern change are population density, unit area Gross Domestic Product (GDP), and the percentage of primary industry. The result of Redundancy analysis (RDA) is that the explanatory ability of landscape pattern to water quality variations decreased from 68.7% to 46.4% in the period 2000–2010. It should be stressed that the contribution of the configuration of impervious surfaces to water quality variation is less than that of the percentage of impervious surfaces.


2021 ◽  
Vol 787 (1) ◽  
pp. 012053
Author(s):  
D G Wang ◽  
Y J Dou ◽  
A Q Shi ◽  
J Cheng ◽  
D A Lv

Author(s):  
GORDON F. McEWAN

Linguistic studies have shown that the traditional idea that the expansion of the Inca Empire was the driving force behind the spread of all Quechua cannot be correct. Across much of its distribution, Quechua has far greater time-depth than can be accounted for by the short-lived Inca Empire. Linguistics likewise suggests that Aymara spread not from the south into Cuzco in the late Pre-Inca period, but also from an origin to the north. Alternative explanations must be sought for the expansion of these language families in the culture history of the Andes. Archaeological studies over the past two decades now provide a broad, generally agreed-upon outline of the cultural history of the Cuzco region. This chapter applies those findings to examine alternative possibilities for the driving forces that spread Quechua and Aymara, offering a clearer cross-disciplinary view of Andean prehistory.


Author(s):  
R. C. MacGregor ◽  
P. N. Hyland ◽  
C. Harvie

Information and Communication Technology (ICT) is today seen as a catalyst for change in the way work is carried out. Over the past decade there have been a number of studies examining both the decision-making behind ICT adoption (the driving forces for adoption) as well as the perceived benefits from that adoption. However, no studies have attempted to determine, or indeed map whether emphasis given to specific driving forces have manifested in differing perceptions of perceived benefits. The purpose of this chapter is to examine whether emphasis on particular driving forces for ICT adoption are associated with the perception of particular benefits. A study was undertaken amongst 198 Australian GPs. Results suggest that greater emphasis on improving communications gives rise to higher perceived benefits both in terms of communications and practice effectiveness, while emphasis on other drivers does not significantly alter the perception of benefits derived from adoption.


2018 ◽  
Vol 28 (5) ◽  
pp. 544-562 ◽  
Author(s):  
P. L. de Zwart ◽  
B. F. Jeronimus ◽  
P. de Jonge

Aims.For the past quarter of a century, Frank et al.’s (1991) consensus-based definitions of major depressive disorder (MDD) episode, remission, recovery, relapse and recurrence have been the paramount driving forces for consistency in MDD research as well as in clinical practice. This study aims to review the evidence for the empirical validation of Frank et al.’s proposed concept definitions and to discuss evidence-based modifications.Methods.A literature search of Web of Science and PubMed from 1/1/1991 to 08/30/2017 identified all publications which referenced Frank et al.’s request for definition validation. Publications with data relevant for validation were included and checked for referencing other studies providing such data.Results.A total of 56 studies involving 39 315 subjects were included, mainly presenting data to validate the severity and duration thresholds for defining remission and recovery. Most studies indicated that the severity threshold for defining remission should decrease. Additionally, specific duration thresholds to separate remission from recovery did not add any predictive value to the notion that increased remission duration alleviates the risk of reoccurrence of depressive symptoms. Only limited data were available to validate the severity and duration criteria for defining a depressive episode.Conclusions.Remission can best be defined as a less symptomatic state than previously assumed (Hamilton Rating Scale for Depression, 17-item version (HAMD-17) ⩽4 instead of ⩽7), without applying a duration criterion. Duration thresholds to separate remission from recovery are not meaningful. The minimal duration of depressive symptoms to define a depressive episode should be longer than 2 weeks, although further studies are required to recommend an exact duration threshold. These results are relevant for researchers and clinicians aiming to use evidence-based depression outcomes.


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