Anonymous Hidden Transaction Model for Blockchain Systems

Author(s):  
Jingyu Zhang ◽  
Guoyao Zhou ◽  
Jin Wang ◽  
Lisha Huang
Keyword(s):  
2021 ◽  
pp. 1356336X2110258
Author(s):  
Eli-Karin S Åsebø ◽  
Helga S Løvoll ◽  
Rune J Krumsvik

The purpose of this study is to explore students’ perceptions of visibility in physical education (PE) using a single cumulative case study approach. Data were generated from the descriptive field notes of seven participant observations ( n = 77), individual semi-structured interviews ( n = 13) and five focus group interviews ( n = 18) with ninth-grade students (ages 14–15 years) from three classes in a public lower secondary school in Norway. The findings show that students perceive visibility differently depending on the context; some students like being visible in PE, while others dread it. Perceptions change rapidly and are situation-specific, influenced by the lesson content, the way the teacher facilitates the lessons, self-perception shaped by past experiences, the presence, actions, and attitudes of fellow students, body pressure and societal body ideals. The findings actualise the relevance of the transaction model of stress and coping ( Lazarus and Folkman, 1984 ) in determining when visibility in PE is and is not perceived as stressful. Consequently, the organization of the PE environment benefits from these insights.


1990 ◽  
Vol 19 (1) ◽  
pp. 3-7 ◽  
Author(s):  
M. E. Rusinkiewicz ◽  
A. K. Elmagarmid ◽  
Y. Leu ◽  
W. Litwin
Keyword(s):  

2009 ◽  
Vol 24 (1-2) ◽  
pp. 85-100 ◽  
Author(s):  
Francis Gropengießer ◽  
Katja Hose ◽  
Kai-Uwe Sattler
Keyword(s):  
Xml Data ◽  

Water ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 577 ◽  
Author(s):  
Lizhen Wang ◽  
Yong Zhao ◽  
Yuefei Huang ◽  
Jianhua Wang ◽  
Haihong Li ◽  
...  

Water-rights trade has proved to be an effective method for coping with water shortages through the transfer of water resources between users. The water allocation system is classified into two categories based on information transparency and water rights transaction goals: administered system (AS) and market-based system (MS). A multi-agent and multi-objective optimal allocation model, built on a complex adaptive system, was introduced to direct the distribution of water resources under an AS in the Shiyang River Basin; it was compared with a market-based water rights transaction model using the bulletin-board approach. Ideal economic agent equations played a dominant role in both models. The government and different water users were conceptualized as agents with different behaviors and goals in water allocation. The impact of water-saving cost on optimal water allocation was also considered. The results showed that an agent’s water-saving behavior was incentivized by high transaction prices in the water market. Under the MS, the highest bid in the quotation set had a dominant influence on how trade was conducted. A higher transaction price will, thus, result in a better benefit ratio, and a lower one will result in inactivity in terms of water rights trade. This will significantly impact the economic benefit to the basin.


Author(s):  
Zainul Efendy

This research is done to find a simple solution how to find a normalization techniques are appropriate in database design, normalization techniques has several steps of which are forms of abnormal, normalization first, normalization 2st and normalization 3st, only 3 stages rare to be discussed in this study, as in lectures often find their students do not understand to implement this normalization techniques. The results of this study include determining the database data structures, forming sql (structural query language) by using MySQL DBMS and prototype transaction model form.


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