scholarly journals Assessing behavioural and physiological responses of three aquatic invertebrates to tributyltin and atrazine in a multi-species, early warning biomonitoring technology

2021 ◽  
Author(s):  
Gillian Claire Marshall

Recent global events and anthropogenic changes to the natural environment have raised concerns about the quality of drinking water consumed by the public throughout the world. Traditional chemical testing is slow and is not performed for all possible contaminants, necessitating the development of innovative new technology to detect and mitigate threats to human health. The development of a multi-species, early-warning biomonitoring technology, based on behavioural and physiological changes in aquatic organisms, greatly furthers this goal. In this study, changes in movement behaviour and respiration rates were examined in three aquatic species, Daphnia magna, Hyalella azteca and Lumbriculus variegates, exposed to varying concentrations of TBT and atrazine, using digital video analysis and direct oxygen measurement. Different parameters of movement were examined and evaluated for inclusion in a multi-species, early-warning biomonitoring technology and the utility of incorporating these parameters into a model to determine classes and concentrations of various contaminants is discussed. An evaluation of whether or not direct measurement of oxygen consumption rates is feasible and useful for inclusion in a multi-species, early-warning biomonitoring technology is also discussed.

2021 ◽  
Author(s):  
Gillian Claire Marshall

Recent global events and anthropogenic changes to the natural environment have raised concerns about the quality of drinking water consumed by the public throughout the world. Traditional chemical testing is slow and is not performed for all possible contaminants, necessitating the development of innovative new technology to detect and mitigate threats to human health. The development of a multi-species, early-warning biomonitoring technology, based on behavioural and physiological changes in aquatic organisms, greatly furthers this goal. In this study, changes in movement behaviour and respiration rates were examined in three aquatic species, Daphnia magna, Hyalella azteca and Lumbriculus variegates, exposed to varying concentrations of TBT and atrazine, using digital video analysis and direct oxygen measurement. Different parameters of movement were examined and evaluated for inclusion in a multi-species, early-warning biomonitoring technology and the utility of incorporating these parameters into a model to determine classes and concentrations of various contaminants is discussed. An evaluation of whether or not direct measurement of oxygen consumption rates is feasible and useful for inclusion in a multi-species, early-warning biomonitoring technology is also discussed.


2004 ◽  
Vol 1 (1) ◽  
pp. 78 ◽  
Author(s):  
Dimitrios Ptochos ◽  
Dimitrios Panopoulos ◽  
Kostas Metaxiotis ◽  
Dimitrios Askounis ◽  
John Psarras

2010 ◽  
pp. 1193-1205
Author(s):  
M. Manuela Cruz-Cunha ◽  
António Tavares ◽  
Isabel Miranda

The healthcare sector has been continuously growing in importance in the past years throughout the entire world, and particularly in most Western countries and the U.S., where we witness an increase of expenditure in health per capita every year. This is related to many aspects of contemporary society, including an increase in life expectancy, the public demand for a better quality of life and better health services. This must be met with more cost-efficient approaches, and new technology-based solutions for providing health and other services. The chapter contextualizes the utilization of electronic marketplaces (e-marketplaces) for the social and healthcare sectors, how this field has been evolving in recent years, current challenges and trends, and their contribut to society. The authors also discuss a pilot project of an e-marketplace for healthcare and social services currently being developed in the Guimarães Municipality, including its goal, definition and implementation, as well as the commercially available enabling technology and tools.


1990 ◽  
Vol 15 (2) ◽  
pp. 19-23
Author(s):  
Hélène David

In the last decade, some 60 videodiscs have been produced on aspects of the French cultural heritage. These represent nearly one-third of the total of videodiscs recorded in a national survey published in 1988. All types of collection, and every historical period, are represented. Videodiscs have been employed for the sake of their administrative benefits and to conserve visual material, but also to exploit that material more effectively and to make it more accessible to the public. Thus some videodiscs are available to the public while others are not. The requirements for producing a videodisc vary with the purpose which it is to serve; although there are several different methods of transferring images to videodisc, the quality of the image depends above all on the quality of the original; similarly, there are various ways of linking images to the supporting documentation without which a videodisc is as good as useless. Initiatives to date have explored the potential of this new technology in an innovative spirit; in so doing they have demonstrated, but have scarcely begun to fulfil, the variety of needs which, in this visual age, videodiscs have the capacity to meet.


Author(s):  
M. Manuela Cruz-Cunha ◽  
Ricardo Simões ◽  
António Tavares ◽  
Isabel Miranda

The healthcare sector has been continuously growing in importance in the past years throughout the entire world, and particularly in most Western countries and the U.S., where we witness an increase of expenditure in health per capita every year. This is related to many aspects of contemporary society, including an increase in life expectancy, the public demand for a better quality of life and better health services. This must be met with more cost-efficient approaches, and new technology-based solutions for providing health and other services. The chapter contextualizes the utilization of electronic marketplaces (e-marketplaces) for the social and healthcare sectors, how this field has been evolving in recent years, current challenges and trends, and their contribut to society. The authors also discuss a pilot project of an e-marketplace for healthcare and social services currently being developed in the Guimarães Municipality, including its goal, definition and implementation, as well as the commercially available enabling technology and tools.


2021 ◽  
Author(s):  
Xiaoyan Li ◽  
Lixia Cao ◽  
Tonghui Wang ◽  
Xiangchu Feng

Abstract In order to improve the scientific quality of the public, the Chinese Association for Science and Technology has put forward a call to combine popular science education with leisure and entertainment. In view of the fact that online shopping involves a wide range of areas, and the people pay more attention to it, the paper completed the innovation of online shopping risk warning science knowledge, the design of popular science mechanism and the dissemination of popular science knowledge. The paper used complex network’s knowledge discovery methods and decision theory to design online shopping risk warning science knowledge; Using the complex network public opinion dissemination trust analysis realize the dissemination of popular science knowledge and promote the improvement of the public's quality of popular science. The spread of risk early warning science knowledge in the network shows that the risk early warning mechanism designed can achieve the purpose of improving public science knowledge when the reward and punishment measures are appropriate.


Author(s):  
Marlene Kunst

Abstract. Comments sections under news articles have become popular spaces for audience members to oppose the mainstream media’s perspective on political issues by expressing alternative views. This kind of challenge to mainstream discourses is a necessary element of proper deliberation. However, due to heuristic information processing and the public concern about disinformation online, readers of comments sections may be inherently skeptical about user comments that counter the views of mainstream media. Consequently, commenters with alternative views may participate in discussions from a position of disadvantage because their contributions are scrutinized particularly critically. Nevertheless, this effect has hitherto not been empirically established. To address this gap, a multifactorial, between-subjects experimental study ( N = 166) was conducted that investigated how participants assess the credibility and argument quality of media-dissonant user comments relative to media-congruent user comments. The findings revealed that media-dissonant user comments are, indeed, disadvantaged in online discussions, as they are assessed as less credible and more poorly argued than media-congruent user comments. Moreover, the findings showed that the higher the participants’ level of media trust, the worse the assessment of media-dissonant user comments relative to media-congruent user comments. Normative implications and avenues for future research are discussed.


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