Electrochemical NOx Sensors for Automotive Diesel Exhaust

2002 ◽  
Vol 756 ◽  
Author(s):  
Louis P. Martin ◽  
Ai-Q. Pham ◽  
Robert S. Glass
Keyword(s):  
High Sensitivity ◽  
Response Speed ◽  
Fast Response ◽  
Exhaust Gas ◽  
Oxides Of Nitrogen ◽  
Monitoring And Control ◽  
Stabilized Zirconia ◽  
Exact Role ◽  
And Control

ABSTRACTNew emissions regulations will increase the need for compact, inexpensive sensors for monitoring and control of automotive exhaust gas pollutants. Species of interest include hydrocarbons, carbon monoxide, and oxides of nitrogen (NOx). The current work is directed towards the development of fast, high sensitivity electrochemical NOx sensors for automotive diesel applications. We have investigated potentiometric NO sensors with good sensitivity and fast response when operated in 10% O2. The sensors consist of yttria-stabilized zirconia substrates attached with NiCr2O4 sensing electrodes and Pt reference electrodes. A composite NiCr2O4:Rh sensing electrode is shown to give significantly faster response than NiCr2O4 alone. The exact role of the Rh in enhancing the response speed is not clear at present. However, the Rh appears to accumulate at the contacts between the NiCr2O4 particles and may enhance the inter-particle electronic conduction. Ongoing testing of these sensors is being performed to elucidate the sensing mechanisms and to quantify cross sensitivity to, for example, NO2.

scholarly journals Tin Disulfide-Coated Microfiber for Humidity Sensing with Fast Response and High Sensitivity

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 648
Author(s):  
Aijie Liang ◽  
Jingyuan Ming ◽  
Wenguo Zhu ◽  
Heyuan Guan ◽  
Xinyang Han ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
Small Diameter ◽  
High Sensitivity ◽  
Large Change ◽  
Small Variation ◽  
Response Speed ◽  
Fast Response ◽  
Tin Disulfide ◽  
Recovery Times ◽  
Response And Recovery

Breath monitoring is significant in assessing human body conditions, such as cardiac and pulmonary symptoms. Optical fiber-based sensors have attracted much attention since they are immune to electromagnetic radiation, thus are safe for patients. Here, a microfiber (MF) humidity sensor is fabricated by coating tin disulfide (SnS2) nanosheets onto the surface of MF. The small diameter (~8 μm) and the long length (~5 mm) of the MF promise strong interaction between guiding light and SnS2. Thus, a small variation in the relative humidity (RH) will lead to a large change in optical transmitted power. A high RH sensitivity of 0.57 dB/%RH is therefore achieved. The response and recovery times are estimated to be 0.08 and 0.28 s, respectively. The high sensitivity and fast response speed enable our SnS2-MF sensor to monitor human breath in real time.

scholarly journals The role of monitoring and control of toxicinfections and toxicoses in providing biosafety of Ukraine’s population

2018 ◽  
Vol 32 (2) ◽  
pp. 585-592
Author(s):  
T. I. Fotina ◽  
H. A. Fotina ◽  
Zh. E. Klishchova ◽  
V. L. Arefiev ◽  
О. М. Chemych
Keyword(s):  
Monitoring And Control ◽  
And Control

Managing Corporate E-Mail Systems

2011 ◽  
pp. 254-281
Author(s):  
Aidan Duane ◽  
Patrick Finnegan
Keyword(s):  
Major Elements ◽  
Electronic Business ◽  
Monitoring And Control ◽  
Negative Effects ◽  
Multiple Case ◽  
And Control ◽  
Mail System ◽  
E Mail

As the criticality of e-mail for electronic business activity increases, adhoc e-mail implementation, prolonged management neglect and user abuse of e-mail systems have generated negative effects. However, management’s ability to rectify problems with e-mail systems is hindered by our understanding of its organisational use. Research on e-mail systems is often dated and based on quantitative methodologies that cannot explain the interaction between various controls in organisational settings. Updating our understanding of the organisational aspects of e-mail systems utilizing qualitative methods is necessary. This chapter presents a multiple case study investigation of e-mail system monitoring and control. The study examines the interaction between key elements of e-mail control identified by previous researchers and considers the role of such controls at various implementation phases. The findings reveal eight major elements to be particularly important in monitoring and controlling e-mail systems within the organisations studied. These are: (1) form a cross-functional e-mail system management team; (2) implement and regularly update e-mail management software; (3) formulate a detailed and legally sound e-mail policy; (4) engage in structured e-mail system training; (5) create and maintain ongoing awareness of e-mail policy; (6) engage in a process of hybrid feedback and control-based e-mail monitoring; (7) firmly enforce discipline in accordance with the e-mail policy; and (8) conduct regular reviews and updates of the e-mail management programme.

Development of Metacognition and Self-Regulated Learning in Young Children: Role of Collaborative and Peer-Assisted Learning

2007 ◽  
Vol 6 (3) ◽  
pp. 433-455 ◽  
Author(s):  
David Whitebread ◽  
Sue Bingham ◽  
Valeska Grau ◽  
Deborah Pino Pasternak ◽  
Claire Sangster
Keyword(s):  
Young Children ◽  
Small Groups ◽  
Educational Practice ◽  
Monitoring And Control ◽  
Peer Assisted Learning ◽  
Self Regulated Learning ◽  
The United Kingdom ◽  
Age Range ◽  
And Control

The authors present findings from a large 2-year study exploring the development of self-regulatory and metacognitive abilities in young children (aged 3 to 5 years) in educational naturalistic settings in the United Kingdom (English Nursery and Reception classrooms). Three levels of analysis were conducted based on observational codings of categories of metacognitive and self-regulatory behaviors. These analyses supported the view that, within the 3- to 5-year age range, there was extensive evidence of metacognitive behaviors that occurred most frequently during learning activities that were initiated by the children, involved them in working in pairs or small groups, unsupervised by adults, and that involved extensive collaboration and talk (i.e., learning contexts that might be characterized as peer-assisted learning). Relative to working individually or in groups with adult support, children in this age range working in unsupervised small groups showed more evidence of metacognitive monitoring and control. Relative to children in supervised groups, they also showed more evidence of “other” and “shared” regulation. The implications for research, theory, and educational practice are discussed.

The role of serotonin (5-HT) in performance monitoring and control: A combined genetic and pharmacological EEG study

2014 ◽  
Vol 94 (2) ◽  
pp. 184
Author(s):  
Adrian G. Fischer ◽  
Tanja Endrass ◽  
Martin Reuter ◽  
Christian Kubisch ◽  
Markus Ullsperger
Keyword(s):  
Performance Monitoring ◽  
Monitoring And Control ◽  
And Control

Information for business — the future of Scotland

1979 ◽  
Vol 1 (3) ◽  
pp. 177-179 ◽  
Author(s):  
J.A. Kennerley
Keyword(s):  
Information System ◽  
Monitoring And Control ◽  
Business Information ◽  
Demand Structure ◽  
Information Demand ◽  
The Future ◽  
Modern Business ◽  
And Control

In this paper the author distinguishes between the busi ness manager's task of making decisions and the supervisor's role of monitoring and control, and urges that the former must be aware of the modern business information system. The importance of firms developing an 'Information Demand Structure' is discussed to allow the making of instant com parisons of various courses of action in response to informa tion on events which are outside of their usual planning and which are likely to affect their business.

scholarly journals The role of answer fluency and perceptual fluency in the monitoring and control of reasoning: Reply to

Cognition ◽  
2013 ◽  
Vol 128 (2) ◽  
pp. 256-258 ◽  
Author(s):  
Valerie A. Thompson ◽  
Rakefet Ackerman ◽  
Yael Sidi ◽  
Linden J. Ball ◽  
Gordon Pennycook ◽  
...  
Keyword(s):  
Perceptual Fluency ◽  
Monitoring And Control ◽  
And Control

scholarly journals The Role of the Ambon City’s Population and Civil Registration Office in Controlling Incoming Migration

2019 ◽  
Vol 23 (2) ◽  
pp. 163
Author(s):  
Rahmawati Sururama ◽  
Tiara Nanuru
Keyword(s):  
Personal Data ◽  
Secondary Data ◽  
Population Monitoring ◽  
Monitoring And Control ◽  
Population Mobility ◽  
Civil Registration ◽  
The Government ◽  
Using Data ◽  
And Control

The objectives of this study are to find out the role of the Ambon City’s Population and Civil Registration Office in Controlling Incoming Migration and to find out the obstacles faced by the Ambon City's Population and Civil Registration Office in Controlling Incoming Migration. This study used a qualitative descriptive research method. Data Collection was obtained through observation, interview, and documentation. Data were analyzed using data reduction, display data, and verification. Primary and secondary data were used as the sources for analysis. The informants in this study were the chief of the Population and Civil Registration Office Ambon City and the Population Monitoring and Control Division, as well as the migrants. Ambon City’s Government, through the Population and Civil Registration Office, has carried out its duties as regulated by the Mayor of Ambon Regulation No. 17/ 2009 article 14 paragraph 2, namely: Coordinating the monitoring of urbanization of population and supervising the registration of population mobility flows. The constraints faced by the Ambon City population and civil registration office, namely: Most of the population who migrated to Ambon City did not report themselves so the authorities had difficulty monitoring the flow of urbanization and monitoring population mobility; inspected and supervised residents, who have not lived in Ambon city for six months, have moved to other areas; there is no effort and awareness of people who have been examined and under supervision to change by reporting personal data to the government.

scholarly journals New traps for the capture of Aedes aegypti (Linnaeus) and Aedes albopictus (Skuse) (Diptera: Culicidae) eggs and adults

2020 ◽  
Author(s):  
Karina Rossi da Silva ◽  
William Ribeiro da Silva ◽  
Bianca Piraccini Silva ◽  
Adriano Nobre Arcos ◽  
Francisco A. da Silva Ferreira ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
High Efficiency ◽  
Low Cost ◽  
High Sensitivity ◽  
Ease Of Use ◽  
Monitoring And Control ◽  
Density Index ◽  
Egg Density ◽  
And Control

AbstractThe control of arboviruses carried by Aedes aegypti (Linnaeus) and Aedes albopictus (Skuse) can be performed with tools that monitor and reduce the circulation of these vectors. Therefore, the efficiency of four types of traps in capturing A. aegypti and A. albopictus eggs and adults, with the biological product Vectobac WG®, was evaluated in the field. For this, 20 traps were installed in two locations, which were in the South (Londrina, Paraná) and North (Manaus, Amazonas) Regions of Brazil, from March to April 2017 and January to February 2018, respectively. The UELtrap-E and UELtrap-EA traps captured A. aegypti and A. albopictus eggs: 1703/1866 eggs in Londrina, and 10268/2149 eggs in Manaus, respectively, and presented high ovitraps positivity index (OPI) values (averages: 100%/100% in Londrina, and 100%/96% in Manaus, respectively); and high egg density index (EDI) values (averages: 68/75 in Londrina, and 411/89 in Manaus, respectively), so they had statistically superior efficiency to that of the CRtrap-E and CRtrap-EA traps in both regions, that captured less eggs and adults: 96/69 eggs in Londrina, and 1091/510 eggs in Manaus, respectively. Also presented lower OPI values (averages: 28%/4% in Londrina, and 88%/60% in Manaus, respectively); and lower EDI values (averages: 10.5/9 in Londrina, and 47/30 in Manaus, respectively). The capture ratios of Aedes adults in the UELtrap-EA and CRtrap-EA traps in Londrina and Manaus were 53.3%/29.5% and 0%/9.8%, respectively. UELtrap-E and UELtrap-EA can be adopted as efficient tools for Aedes monitoring due to their high sensitivity, low cost and ease of use.Author summaryAedes aegypti and Aedes albopictus are species of mosquitoes responsible for the transmission of several arboviruses that cause infections worldwide. However, there are still no effective and safe vaccines or medications to prevent or treat arboviruses transmitted by these vectors, except for yellow fever. Moreover, current methodologies for monitoring and controlling A. aegypti and A. albopictus are not fully effective, as evidenced by the increasing cases of the arbovirus transmitted by these mosquitoes or have incompatible costs with the socioeconomic conditions of a large number of people. Thus, the traps tested in this study can be used as more effective and economical tools for monitoring and controlling A. aegypti and A. albopictus, since they are made with low cost material and they showed high efficiency in the capture of eggs, evidenced by the high values of ovitraps positive index and eggs density index, besides that one of the models captured Aedes spp. adults in both regions where they were tested. Therefore, the traps have potential for reducing Aedes spp. eggs and adults in the environment and sensibility for determining the local infestation index, which can be reconciled with official government strategies for more accurate vector monitoring and control actions.

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