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Open Access
Book part
Publication date: 4 May 2018

Salahuddin, Bakhtiar, Yusman and Fadhli

Purpose – This study aims to design and build a wireless supervisory control and data acquisition (SCADA) system based on Protocol AX.25 with the aim of monitoring the performance…

Abstract

Purpose – This study aims to design and build a wireless supervisory control and data acquisition (SCADA) system based on Protocol AX.25 with the aim of monitoring the performance of several parameters in Microhydro Power Plant (MHPP). This system can monitor several MHPP parameters such as voltage, current, frequency, and turbine rotation so that it can be accessed directly at one central location.

Design/Methodology/Approach – The design is done by taking into account the real parameters that exist in the MHPP. Some parameters that become the main object to see the performance of MHPP are voltage, current, frequency, and turbine rotation. The voltage generated by the MHPP must be adjusted to the voltage supplied by State Electricity Company to the consumer, including the phase used. The resulting stream should also be monitored for power to be adjusted to the turbine spin. The generator frequency is kept stable according to the standard frequency of the State Electricity Company generator.

Findings – The remote terminal unit (RTU) system has been simulated using 2 ACS712 current sensors, voltage sensor, zero crossing point, frequency sensor, and rotation sensor functionalized to monitor MHPP parameters. The AX.25 protocol has been applicable in the wireless SCADA network for monitoring the performance of MHPP by embedding in KYL-1020UA transceiver radio using the 433 MHz frequency and the audio frequency shift keying modulation system. Radio transmitter KYL-1020UA has been successfully simulated to send data from sensors to display on the computer through SCADA built applications. The data changes in the RTU section can be displayed properly on the graphic user interface in accordance with the existing display at the MHPP location.

Research Limitations/Implications – There are only two RTUs that will be connected to communicate, in this case MHPP-1 with callsign “RTU-001” and MHPP-2 with callsign “RTU-002.” While the existing devices in the data access section parameters MHPP as master station with callsign “MSSCADA” monitoring the performance of parameters sent from the RTU. There is no collision or error in data transmission. Baudrate is varied at 1,200 bps, 2,400 bps, 4,800 bps, and 9,600 bps for effective throughput calculation and AX.25 protocol efficiency. The transmission distance is varied at 100 m, 200 m, 300 m, and 500 m to see the bit error rate with baudrate 1,200 bps and 9,600 bps.

Practical Implications – This product is expected to be applied to several MHPP locations in Aceh Province so that its monitoring system is more centralized and efficient.

Originality/Value – This research if for the efficient monitoring of several MHPP located far apart and can be monitored in one central location so that operators do not have to be located at the plant site.

Article
Publication date: 22 February 2008

Kamaruzaman Jusoff

The aim of this paper is to present the latest advances in real‐time airborne hyperspectral sensing applications in identifying and mapping the likely spots to be zeroed in for…

Abstract

Purpose

The aim of this paper is to present the latest advances in real‐time airborne hyperspectral sensing applications in identifying and mapping the likely spots to be zeroed in for the SAR operations.

Design/methodology/approach

A Sabah Air GAF Nomad N22B low altitude fixed wing aircraft equipped with an AISA airborne hyperspectral imaging system flew over the steep gradient carved by very narrow valleys, ridges, precipitous escarpments and ravines, extensively covered by thick virgin forest of the highlands. The study was carried out by an AISA sensor, which is a complete system that consists of a compact hyperspectral sensor head, miniature GPS/INS sensor for precise positioning, data acquisition unit and Caligeo post‐processing software.

Findings

These UPM‐APSB's AISA flights demonstrated that quality real‐time hyperspectral images could be pre‐processed on‐board the aircraft and become accessible to the SAR committee members for quick ground SAR within two hours after the flight. The combined geospatial information technologies were a major breakthrough in the Malaysian SAR real‐time imaging technique.

Originality/value

It is expected that future precise locations of the suspected targets can be transmitted via very high frequency radio communications and become accessible to the SAR ground members such as the commandos VAT 69. Real‐time airborne hyperspectral imaging will benefit strategic SAR and help reduce the loss of lives in future helicopter crashes in the Bario‐Ba'Kelalan areas.

Details

Disaster Prevention and Management: An International Journal, vol. 17 no. 1
Type: Research Article
ISSN: 0965-3562

Keywords

Open Access
Book part
Publication date: 4 May 2018

Abstract

Details

Proceedings of MICoMS 2017
Type: Book
ISBN:

Article
Publication date: 1 June 2002

George K. Chacko

Develops an original 12‐step management of technology protocol and applies it to 51 applications which range from Du Pont’s failure in Nylon to the Single Online Trade Exchange…

3740

Abstract

Develops an original 12‐step management of technology protocol and applies it to 51 applications which range from Du Pont’s failure in Nylon to the Single Online Trade Exchange for Auto Parts procurement by GM, Ford, Daimler‐Chrysler and Renault‐Nissan. Provides many case studies with regards to the adoption of technology and describes seven chief technology officer characteristics. Discusses common errors when companies invest in technology and considers the probabilities of success. Provides 175 questions and answers to reinforce the concepts introduced. States that this substantial journal is aimed primarily at the present and potential chief technology officer to assist their survival and success in national and international markets.

Details

Asia Pacific Journal of Marketing and Logistics, vol. 14 no. 2/3
Type: Research Article
ISSN: 1355-5855

Keywords

Article
Publication date: 22 February 2008

James A. Hunt

The aim of this paper is to provide an update on the status of current fieldbuses and high‐speed Ethernet technologies for industrial automation.

1163

Abstract

Purpose

The aim of this paper is to provide an update on the status of current fieldbuses and high‐speed Ethernet technologies for industrial automation.

Design/methodology/approach

The paper provides information on the various fieldbus technologies for industrial automation connectivity and examines high‐speed deterministic Ethernets for automated manufacturing and assembly plant.

Findings

The paper finds that the standards issue has still not been fully resolved, that Ethernets reduce manufacturing costs compared with conventional fieldbuses, that most effort has gone into making Ethernets work deterministically, rather than concentrating on IT and enterprise resource planning (ERP) integration, and that the internet will increasingly feed real‐time data to ERP levels.

Originality/value

The paper provides information on recent developments in Ethernet technologies.

Details

Assembly Automation, vol. 28 no. 1
Type: Research Article
ISSN: 0144-5154

Keywords

Abstract

Details

Documents on Modern History of Economic Thought: Part C
Type: Book
ISBN: 978-0-76230-998-6

Abstract

Details

Documents on Modern History of Economic Thought: Part C
Type: Book
ISBN: 978-0-76230-998-6

Abstract

Details

Documents on Modern History of Economic Thought: Part C
Type: Book
ISBN: 978-0-76230-998-6

Book part
Publication date: 26 January 2023

Rachel Elizabeth Fish, David Enrique Rangel, Nelly De Arcos and Olivia Friend

In this chapter, we examine how the schooling experiences of disabled children have changed during COVID-19, how families' engagement, advocacy and support of their children have…

Abstract

Purpose

In this chapter, we examine how the schooling experiences of disabled children have changed during COVID-19, how families' engagement, advocacy and support of their children have shifted during the pandemic, and how race, class, and other axes of inequality shape these processes.

Methods/Approach

We used a semi-structured interview protocol with families of disabled children, asking them about their experiences with their children's schools before and during the pandemic. We analyzed the interview data using “flexible coding” and the constant comparative method.

Findings

COVID-19 has had wide-reaching effects on disabled children's schooling experiences, yet these effects varied, particularly at the intersections of disability with race, class, linguistic status, and gender. Remote learning and other pandemic-related changes to schools exacerbated extant inequalities in children's educational experiences, as well as in families' ability to effectively advocate for their children in school.

Implications/Value

This research provides important information about how the pandemic has exacerbated inequality at the intersection of disability, race, and other axes of inequality. Moreover, it provides a lens to examine ableism and other systems of oppression in schools. The findings have crucial policy implications, pointing to the necessity of equitably allocated, high quality, inclusive educational services for disabled students, as well as to the need for special education policy that does not rely on individual family advocacy to allocate appropriate services.

Details

Disability in the Time of Pandemic
Type: Book
ISBN: 978-1-80262-140-2

Keywords

Article
Publication date: 1 April 2003

Georgios I. Zekos

Aim of the present monograph is the economic analysis of the role of MNEs regarding globalisation and digital economy and in parallel there is a reference and examination of some…

88270

Abstract

Aim of the present monograph is the economic analysis of the role of MNEs regarding globalisation and digital economy and in parallel there is a reference and examination of some legal aspects concerning MNEs, cyberspace and e‐commerce as the means of expression of the digital economy. The whole effort of the author is focused on the examination of various aspects of MNEs and their impact upon globalisation and vice versa and how and if we are moving towards a global digital economy.

Details

Managerial Law, vol. 45 no. 1/2
Type: Research Article
ISSN: 0309-0558

Keywords

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