change type
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2021 ◽  
Vol 13 (24) ◽  
pp. 5031
Author(s):  
Lixiao Yang ◽  
Stéphanie Horion ◽  
Chansheng He ◽  
Rasmus Fensholt

Large-scale ecological restoration (ER) projects have been implemented in northwest China in recent decades as a means to prevent desertification and improve ecosystem services. However, previous studies have demonstrated adverse impacts in the form of widespread soil water deficit caused by intensive ER activities. Understanding the role of climate change and ER efforts in vegetation dynamics and soil moisture consumption is essential for sustainable ecosystem management. Here, we used the break for additive season and trend (BFAST) method to analyse spatial patterns in the normalized difference vegetation index (NDVI) variation over the agro-pastoral ecotone of northwest China (APENC) for 2000–2015. From the combined use of generalized additive modelling (GAM) and residual-trend analysis (RESTREND), we distinguished and quantified the effects of climate and human management on vegetation and soil water dynamics. Approximately 78% of the area showed vegetation variations representing a significant change in NDVI, of which more than 68% were categorized as abrupt changes. Large areas of the abrupt change type, interrupted increase and monotonic increase in NDVI were observed before 2006, and small areas of the change type of negative reversals were observed after 2012. Anthropogenic activity was found to be the major driving factor of variation in vegetation (contribution rate of 56%) and soil moisture (contribution rate of 78%). The vegetation expansion, which was mainly related to the large number of ER programs that started in 2000, was found to increase soil moisture depletion. By comparing areas where anthropogenic activities had a high contribution rate to vegetation increase and areas where soil moisture consumption was severely increased, we identify and discuss hotspot areas of soil moisture consumption caused by the ER programs. The current methodological workflow and results represent a novel foundation to inform and support water resource management and ecological-restoration-related policy making.


2021 ◽  
Vol 9 ◽  
Author(s):  
Senlin Yin ◽  
Baiyu Zhu ◽  
Youxin Wu ◽  
Feng Xu

As the controlling effect of complex lithofacies of lacustrine mixed fine-grained rocks on the shale oil sweet spot remains unclear, core, outcrop, general logging, nuclear magnetic resonance (NMR) logging, testing, and production data were used to study the types, combination pattern, and genesis of lithofacies architectures of lacustrine mixed fine-grained rocks in the study area by lithofacies hierarchy analysis, X-ray fluorescence (XRF) logging, UAV, and 3D geological modeling. The research shows that: 1) According to lithology and sedimentary structure, the mixed fine-grained rocks can be divided into 13 lithofacies types of different origins in 5 sub-categories and 2 categories. 2) UAV photography was combined with a traditional field survey to characterize the 3D spatial distribution of lithofacies architecture of the Lucaogou Formation on the outcrop, and it is found that the lithofacies architecture patterns of mixed fine-grained rocks include three types: gradual change type, abrupt change type, and special type. The gradual change type with higher sand development degree and symmetrical lithofacies architecture has a high quality reservoir with dissolution pores, and is mixed beach-bar sand in the mixed zone. It is high in development degree and often appears as several similar cycles stacking over each other. The abrupt change type can be subdivided into two sub-types, asymmetric and smaller in reservoir thickness. It is very high in development degree and often comes in several similar cycles. The special type belongs to thick clastic rock relatively independent in the mixed fine-grained rocks with a high development degree of sand. The sand is a higher quality reservoir with properties of tight reservoir. It often appears as stacking of single cycle sand. 3) The different lithofacies architectures in the mixed fine-grained rocks have significant differences in distribution. The gradual change type is mainly composed of mudstone, dolomitic siltstone, and sandy dolomite, dolomitic siltstone, and mudstone, and appears in lenticular shape overlapping with each other on the plane. The abrupt change type is made up of felsic siltstone, dolomitic siltstone, sandy dolomite, and mudstone, and appears as isolated thin layers on the plane. The special type is mainly composed of mudstone and felsic siltstone, and mudstone, and turns up as lenses of different sizes on the plane.


2021 ◽  
Vol 11 (2) ◽  
pp. 52-68
Author(s):  
Danlami Joseph Aduku ◽  
◽  
Olanrewaju Makinde Hassan ◽  
Akeem Tunde Nafiu ◽  
◽  
...  

This study aimed at analysing perceived change acceptance and change rejection in banks in North Central Nigeria. The study used review strategy and survey strategy. Staff of Systematic Important Banks (SIBs) was the object of interest. For the sample size, given the population for each state (Benue- 168 and Kogi- 202) in the North Central, Sallant and Dillman’s method was used to arrive at 189. Data were analysed using descriptive analytical techniques. Finding showed that employees’ change rejection factors such as perceived change outcomes and change methods are the strongest factors in Benue State while bank employees are likely to reject organizational change on the basis of change type or methods in Kogi State. Finding further showed that the attitude of employees towards change is the strongest factors influencing acceptance of organizational change in Benue State, and that change based on complexity is the strongest factors influencing acceptance of organizational change in banks in Kogi State. The study concluded that employees’ change resistance or rejection is subject to numerous factors. The study recommended that bank leaders should monitor change outcomes and change methods in Benue State, and that change type or methods should be given strong attention in Kogi State.


2021 ◽  
Vol 4 (4) ◽  
pp. 172-177
Author(s):  
Dellia Erdita

This research aims to find out the similes found in the novel “Game of Thrones” and its Indonesian translation “Perebutan Tahta”, and to investigate what translation strategies are used in translating the similes from the source text to the target text. The method applied in this research is descriptive qualitative which is used to describe the phenomena occuring in the translation of similes from English into Indonesian. The data were collected from the first three chapters of the novel Game of Thrones by George R. R. Martin and its Indonesian version entitled Perebutan Tahta. The similes are identified by using the theories of similes proposed by Israel (2014), Harding (2017), Knowles and Moon (2006), and Kridalaksana (2013). In analyzing the data, the translation strategies proposed by Chesterman (2016) are used. The result shows that there are 32 data found, 28 of them are similes translated into similes, while 4 of them are similes translated into non-similes. The translation strategy used to translate similes into similes is trope change type A, while the translation strategy used to translate similes into non-similes are trope change type C. The findings show that the translation of similes into similes are dominant in the first three chapter of the novel with the percentage 87,5% from out of 32 data found, while the translation from similes to non-similes is only 12,5%. The findings also show that there is secondary strategy found while analyzing the data, namely compression. Nevertheless, regardless of the fact that the similes in the source text are translated into similes and non-similes in the target text, the main translation strategy used is still trope change, although the types are different. For the reason that the trope change strategy is specifically stated by Chesterman to translate figurative expressions, which includes simile. Furthermore, the secondary strategy, compression, occurred because due to the structure of Indonesian language, the translation in the target text tends to be shorter than the original source text in English.


2021 ◽  
Vol 87 (4) ◽  
pp. 249-262
Author(s):  
Ting Bai ◽  
Kaimin Sun ◽  
Wenzhuo Li ◽  
Deren Li ◽  
Yepei Chen ◽  
...  

A single-scale object-based change-detection classifier can distinguish only global changes in land cover, not the more granular and local changes in urban areas. To overcome this issue, a novel class-specific object-based change-detection method is proposed. This method includes three steps: class-specific scale selection, class-specific classifier selection, and land cover change detection. The first step combines multi-resolution segmentation and a random forest to select the optimal scale for each change type in land cover. The second step links multi-scale hierarchical sampling with a classifier such as random forest, support vector machine, gradient-boosting decision tree, or Adaboost; the algorithm automatically selects the optimal classifier for each change type in land cover. The final step employs the optimal classifier to detect binary changes and from-to changes for each change type in land cover. To validate the proposed method, we applied it to two high-resolution data sets in urban areas and compared the change-detection results of our proposed method with that of principal component analysis k-means, object-based change vector analysis, and support vector machine. The experimental results show that our proposed method is more accurate than the other methods. The proposed method can address the high levels of complexity found in urban areas, although it requires historical land cover maps as auxiliary data.


2020 ◽  
Vol 73 (1) ◽  
pp. 98-106
Author(s):  
Jan-Peter George ◽  
Mait Lang ◽  
Maris Hordo ◽  
Sandra Metslaid ◽  
Piia Post ◽  
...  

Abstract Global change-type droughts will become more frequent in the future and threaten forest ecosystems around the globe. A large proportion of the Estonian forest sector is currently subject to artificial drainage, which could probably lead to negative feedbacks when water supply falls short because of high temperatures and low precipitation during future drought periods. In this short article, we propose a novel research perspective that could make use of already gathered data resources, such as remote sensing, climate data, tree-ring research, soil information and hydrological modelling. We conclude that, when applied in concert, such an assembled dataset has the potential to contribute to mitigation of negative climate change consequences for the Estonian forest sector. In particular, smart-drainage systems are currently a rare phenomenon in forestry, although their implementation into existing drainage systems could help maintain the critical soil water content during periods of drought, while properly fulfilling their main task of removing excess water during wet phases. We discuss this new research perspective in light of the current frame conditions of the Estonian forest sector and resolve some current lacks in knowledge and data resources which could help improve the concept in the future.


Author(s):  
Sinem Ermin ◽  
Özgür Batum ◽  
Merve Saka Güvenç ◽  
Gülden Diniz ◽  
Aysu Ayrancı ◽  
...  

2020 ◽  
Vol 15 (2) ◽  
pp. 205-214
Author(s):  
Som Ratana ◽  
Chan Raksmey ◽  
Dumitrascu Danut

AbstractAlthough approaches to manage change dated back to as early as human history, managing effective change is still the topic of today’s debates. One of the undeniable facts about this is that change per se keeps changing, and so does its management methodology. While this fact comes, on the one hand, to validate the reason why none of the early theories stands relevant across time, it, on the other hand, proofs that change methodology is certainly fluid, giving no room for an approach to really last. An effective change is achievable [not] by a prescription, but by a thorough consolidation of the various aspects relevant to change. This paper aims therefore at identifying those [managerial] aspects of change, in hope that they could be used to construct a common base to deal with change. To that end, relevant change management hypotheses, approaches, theories dated back to the 50s are taken for thorough reviews. Results from this digest confirm that to manage change, one must factor in change type, change process, and change elements, and yet, to manage it effectively, one must go further to ensure that all the above factors work well together as they are all symbiotically related.


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