Development Of Algorithms For Control Of Humidity In Plant Growth Chambers

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Development of Algorithms for Control of Humidity in Plant Growth Chambers

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721671281
Total Pages : 28 pages
Book Rating : 4.6/5 (712 download)

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Book Synopsis Development of Algorithms for Control of Humidity in Plant Growth Chambers by : National Aeronautics and Space Administration (NASA)

Download or read book Development of Algorithms for Control of Humidity in Plant Growth Chambers written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-21 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Algorithms were developed to control humidity in plant growth chambers used for research on bioregenerative life support at Kennedy Space Center. The algorithms used the computed water vapor pressure (based on measured air temperature and relative humidity) as the process variable, with time-proportioned outputs to operate the humidifier and de-humidifier. Algorithms were based upon proportional-integral-differential (PID) and Fuzzy Logic schemes and were implemented using I/O Control software (OPTO-22) to define and download the control logic to an autonomous programmable logic controller (PLC, ultimate ethernet brain and assorted input-output modules, OPTO-22), which performed the monitoring and control logic processing, as well the physical control of the devices that effected the targeted environment in the chamber. During limited testing, the PLC's successfully implemented the intended control schemes and attained a control resolution for humidity of less than 1%. The algorithms have potential to be used not only with autonomous PLC's but could also be implemented within network-based supervisory control programs. This report documents unique control features that were implemented within the OPTO-22 framework and makes recommendations regarding future uses of the hardware and software for biological research by NASA. Costello, Thomas A. Kennedy Space Center

Design, Implementation, and Evaluation of an Algorithm to Control Crop to Air Vapor Pressure Deficit in a Sunlit Plant Growth Chamber

Author : Christian Anthony Mach
Publisher :
ISBN 13 :
Total Pages : 464 pages
Book Rating : 4.:/5 (464 download)

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Book Synopsis Design, Implementation, and Evaluation of an Algorithm to Control Crop to Air Vapor Pressure Deficit in a Sunlit Plant Growth Chamber by : Christian Anthony Mach

Download or read book Design, Implementation, and Evaluation of an Algorithm to Control Crop to Air Vapor Pressure Deficit in a Sunlit Plant Growth Chamber written by Christian Anthony Mach and published by . This book was released on 2000 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Plant Growth Chamber Handbook

Author : Robert W. Langhans
Publisher :
ISBN 13 :
Total Pages : 254 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Plant Growth Chamber Handbook by : Robert W. Langhans

Download or read book Plant Growth Chamber Handbook written by Robert W. Langhans and published by . This book was released on 1997 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Bioregenerative Life-Support Systems for Crewed Missions to the Moon and Mars

Author : Cyprien Verseux
Publisher : Frontiers Media SA
ISBN 13 : 2832503012
Total Pages : 318 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis Bioregenerative Life-Support Systems for Crewed Missions to the Moon and Mars by : Cyprien Verseux

Download or read book Bioregenerative Life-Support Systems for Crewed Missions to the Moon and Mars written by Cyprien Verseux and published by Frontiers Media SA. This book was released on 2022-10-20 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Development of Smart Ventilation Control Algorithms for Humidity Control in High-Performance Homes in Humid U.S. Climates

Author :
Publisher :
ISBN 13 :
Total Pages : 129 pages
Book Rating : 4.:/5 (985 download)

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Book Synopsis Development of Smart Ventilation Control Algorithms for Humidity Control in High-Performance Homes in Humid U.S. Climates by :

Download or read book Development of Smart Ventilation Control Algorithms for Humidity Control in High-Performance Homes in Humid U.S. Climates written by and published by . This book was released on 2017 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Past field research and simulation studies have shown that high performance homes experience elevated indoor humidity levels for substantial portions of the year in humid climates. This is largely the result of lower sensible cooling loads, which reduces the moisture removed by the cooling system. These elevated humidity levels lead to concerns about occupant comfort, health and building durability. Use of mechanical ventilation at rates specified in ASHRAE Standard 62.2-2013 are often cited as an additional contributor to humidity problems in these homes. Past research has explored solutions, including supplemental dehumidification, cooling system operational enhancements and ventilation system design (e.g., ERV, supply, exhaust, etc.). This project's goal is to develop and demonstrate (through simulations) smart ventilation strategies that can contribute to humidity control in high performance homes. These strategies must maintain IAQ via equivalence with ASHRAE Standard 62.2-2013. To be acceptable they must not result in excessive energy use. Smart controls will be compared with dehumidifier energy and moisture performance. This work explores the development and performance of smart algorithms for control of mechanical ventilation systems, with the objective of reducing high humidity in modern high performance residences. Simulations of DOE Zero-Energy Ready homes were performed using the REGCAP simulation tool. Control strategies were developed and tested using the Residential Integrated Ventilation (RIVEC) controller, which tracks pollutant exposure in real-time and controls ventilation to provide an equivalent exposure on an annual basis to homes meeting ASHRAE 62.2-2013. RIVEC is used to increase or decrease the real-time ventilation rate to reduce moisture transport into the home or increase moisture removal. This approach was implemented for no-, one- and two-sensor strategies, paired with a variety of control approaches in six humid climates (Miami, Orlando, Houston, Charleston, Memphis and Baltimore). The control options were compared to a baseline system that supplies outdoor air to a central forced air cooling (and heating) system (CFIS) that is often used in hot humid climates. Simulations were performed with CFIS ventilation systems operating on a 33% duty-cycle, consistent with 62.2-2013. The CFIS outside airflow rates were set to 0%, 50% and 100% of 62.2-2013 requirements to explore effects of ventilation rate on indoor high humidity. These simulations were performed with and without a dehumidifier in the model. Ten control algorithms were developed and tested. Analysis of outdoor humidity patterns facilitated smart control development. It was found that outdoor humidity varies most strongly seasonally--by month of the year--and that all locations follow the similar pattern of much higher humidity during summer. Daily and hourly variations in outdoor humidity were found to be progressively smaller than the monthly seasonal variation. Patterns in hourly humidity are driven by diurnal daily patterns, so they were predictable but small, and were unlikely to provide much control benefit. Variation in outdoor humidity between days was larger, but unpredictable, except by much more complex climate models. We determined that no-sensor strategies might be able to take advantage of seasonal patterns in humidity, but that real-time smart controls were required to capture variation between days. Sensor-based approaches are also required to respond dynamically to indoor conditions and variations not considered in our analysis. All smart controls face trade-offs between sensor accuracy, cost, complexity and robustness.

Phenomics

Author : John Doonan
Publisher : Frontiers Media SA
ISBN 13 : 2889456072
Total Pages : 222 pages
Book Rating : 4.8/5 (894 download)

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Book Synopsis Phenomics by : John Doonan

Download or read book Phenomics written by John Doonan and published by Frontiers Media SA. This book was released on 2018-11-08 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Phenomics" is an emerging area of research whose aspiration is the systematic measurement of the physical, physiological and biochemical traits (the phenome) belonging to a given individual or collection of individuals. Non-destructive or minimally invasive techniques allow repeated measurements across time to follow phenotypes as a function of developmental time. These longitudinal traits promise new insights into the ways in which crops respond to their environment including how they are managed. To maximize the benefit, these approaches should ideally be scalable so that large populations in multiple environments can be sampled repeatedly at reasonable cost. Thus, the development and validation of non-contact sensing technologies remains an area of intensive activity that ranges from Remote Sensing of crops within the landscape to high resolution at the subcellular level. Integration of this potentially highly dimensional data and linking it with variation at the genetic level is an ongoing challenge that promises to release the potential of both established and under-exploited crops.

Phenotyping at plant and cell levels: The quest for tolerant crop development

Author : Ulrich Schurr
Publisher : Frontiers Media SA
ISBN 13 : 2832541437
Total Pages : 563 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis Phenotyping at plant and cell levels: The quest for tolerant crop development by : Ulrich Schurr

Download or read book Phenotyping at plant and cell levels: The quest for tolerant crop development written by Ulrich Schurr and published by Frontiers Media SA. This book was released on 2024-02-05 with total page 563 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Transactions of the ASAE.

Author : American Society of Agricultural Engineers
Publisher :
ISBN 13 :
Total Pages : 1012 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Transactions of the ASAE. by : American Society of Agricultural Engineers

Download or read book Transactions of the ASAE. written by American Society of Agricultural Engineers and published by . This book was released on 1995 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Transplant Production in the 21st Century

Author : Chieri Kubota
Publisher : Springer Science & Business Media
ISBN 13 : 940159371X
Total Pages : 312 pages
Book Rating : 4.4/5 (15 download)

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Book Synopsis Transplant Production in the 21st Century by : Chieri Kubota

Download or read book Transplant Production in the 21st Century written by Chieri Kubota and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are facing global issues concerning environmental pollution and shortages of food, feed, phytomass (plant biomass) and natural resources, which will become more serious in the forthcoming decades. To solve these issues, immeasurable numbers of various plants and huge amounts of phytomass are required every year for food, feed and for the improvement of amenities, the environment and our quality of life. Increased phytomass is also required as alternative raw material for producing bio-energy, biodegradable plastics and many other plant-originated industrial products. Only by using phytomass as a reproducible energy source and raw material, instead of fossil fuels and atomic power, we can save natural resources and minimize environmental pollution. To increase phytomass globally, we need billions of quality transplants (small plants) to be grown yearly, in the field or in the greenhouse, under various environmental conditions. However, these high quality transplants can be produced only under carefully controlled, rather than variable environment al conditions. Recent research has shown that the closed transplant production system requires considerably small amounts of electricity, water, fertilizer, CO) and pesticide to produce value-added transplants as scheduled with minimum release of environmental pollutants and minimum loss of transplants. The closed or closed-type transplant production system is defined as a transplant production system covered with opaque walls with minimized or controlled ventilation rates, using artificial lighting. With this system, photoperiod, light intensity and quality, air temperature, humidity, CO) concentration and air current speed can be controlled as desired.

Intelligent Computing & Optimization

Author : Pandian Vasant
Publisher : Springer Nature
ISBN 13 : 3031199588
Total Pages : 1215 pages
Book Rating : 4.0/5 (311 download)

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Book Synopsis Intelligent Computing & Optimization by : Pandian Vasant

Download or read book Intelligent Computing & Optimization written by Pandian Vasant and published by Springer Nature. This book was released on 2022-10-20 with total page 1215 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book of Springer Nature is another proof of Springer’s outstanding and greatness on the lively interface of Smart Computational Optimization, Green ICT, Smart Intelligence and Machine Learning! It is a Master Piece of what our community of academics and experts can provide when an Interconnected Approach of Joint, Mutual and Meta Learning is supported by Modern Operational Research and Experience of the World-Leader Springer Nature! The 5th edition of International Conference on Intelligent Computing and Optimization took place at October 27–28, 2022, via Zoom. Objective was to celebrate “Creativity with Compassion and Wisdom” with researchers, scholars, experts and investigators in Intelligent Computing and Optimization across the planet, to share knowledge, experience, innovation—a marvelous opportunity for discourse and mutuality by novel research, invention and creativity. This proceedings book of ICO’2022 is published by Springer Nature—Quality Label of wonderful.

Dissertation Abstracts International

Author :
Publisher :
ISBN 13 :
Total Pages : 884 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Dissertation Abstracts International by :

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

International Aerospace Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 1016 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis International Aerospace Abstracts by :

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook of Smart Materials, Technologies, and Devices

Author : Chaudhery Mustansar Hussain
Publisher : Springer Nature
ISBN 13 : 3030842053
Total Pages : 2831 pages
Book Rating : 4.0/5 (38 download)

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Book Synopsis Handbook of Smart Materials, Technologies, and Devices by : Chaudhery Mustansar Hussain

Download or read book Handbook of Smart Materials, Technologies, and Devices written by Chaudhery Mustansar Hussain and published by Springer Nature. This book was released on 2022-11-09 with total page 2831 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook brings together technical expertise, conceptual background, applications, and societal aspects of Industry 4.0: the evolution of automation and data exchange in fabrication technologies, materials processing, and device manufacturing at both experimental and theoretical model scales. The book assembles all the aspects of Industry 4.0, starting from the emergence of the concept to the consequences of its progression. Drawing on expert contributors from around the world, the volume details the technologies that sparked the fourth revolution and illustrates their characteristics, potential, and methods of use in the industrial and societal domains. In addition, important topics such as ethics, privacy and security are considered in a reality where all data is shared and saved remotely. The collection of contribution serve a very broad audience working in the fields of science and engineering, chemical engineering, materials science, nanotechnology, energy, environment, green chemistry, sustainability, electrical and electronic engineering, solid-state physics, surface science, aerosol technology, chemistry, colloid science, device engineering, and computer technology. This handbook ideal reference libraries in universities and industrial institutions, government and independent institutes, individual research groups and scientists.

Branching and Rooting Out with a CT Scanner: The Why, the How, and the Outcomes, Present and Possibly Future

Author : Pierre Dutilleul
Publisher : Frontiers Media SA
ISBN 13 : 2889197913
Total Pages : 93 pages
Book Rating : 4.8/5 (891 download)

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Book Synopsis Branching and Rooting Out with a CT Scanner: The Why, the How, and the Outcomes, Present and Possibly Future by : Pierre Dutilleul

Download or read book Branching and Rooting Out with a CT Scanner: The Why, the How, and the Outcomes, Present and Possibly Future written by Pierre Dutilleul and published by Frontiers Media SA. This book was released on 2016-04-13 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Until recently, a majority of the applications of X-ray computed tomography (CT) scanning in plant sciences remained descriptive; some included a quantification of the plant materials when the root-soil isolation or branch-leaf separation was satisfactory; and a few involved the modeling of plant biology processes or the assessment of treatment or disease effects on plant biomass and structures during growth. In the last decade, repeated CT scanning of the same plants was reported in an increasing number of studies in which moderate doses of X-rays had been used. Besides the general objectives of Frontiers in Plant Science research topics, “Branching and Rooting Out with a CT Scanner” was proposed to meet specific objectives: (i) providing a non-technical update on knowledge about the application of CT scanning technology to plants, starting with the type of CT scanning data collected (CT images vs. CT numbers) and their processing in the graphical and numerical approaches; (ii) drawing the limits of the CT scanning approach, which because it is based on material density can distinguish materials with contrasting or moderately overlapping densities (e.g., branches vs. leaves, roots vs. non-organic soils) but not the others (e.g., roots vs. organic soils); (iii) explaining with a sufficient level of detail the main procedures used for graphical, quantitative and statistical analyses of plant CT scanning data, including fractal complexity measures and statistics appropriate for repeated plant CT scanning, in experiments where the research hypotheses are about biological processes such as light interception by canopies, root disease development and plant growth under stress conditions; (iv) comparing plant CT scanning with an alternative technology that applies to plants, such as the phenomics platforms which target leaf canopies; and (v) providing current and potential users of plant CT scanning with up-to-date information and exhaustive documentation, including clear perspectives and well-defined goals for the future, for them to be even more efficient or most efficient from start in their research work.

Hydroponics: The Future Of Agriculture

Author : Mark LaHive
Publisher : Mark LaHIve
ISBN 13 :
Total Pages : 139 pages
Book Rating : 4./5 ( download)

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Book Synopsis Hydroponics: The Future Of Agriculture by : Mark LaHive

Download or read book Hydroponics: The Future Of Agriculture written by Mark LaHive and published by Mark LaHIve. This book was released on 2024-01-09 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Hydroponics: The Future of Agriculture" is an in-depth exploration of hydroponic systems, offering valuable knowledge for both beginners and experienced practitioners. This book serves as an essential resource, providing a thorough understanding of the principles and practices of hydroponic farming. Key features include: Detailed history and evolution of hydroponic methods. Comprehensive guide to different hydroponic systems, including setup and maintenance. In-depth discussion on optimizing plant growth and nutrient delivery. Practical solutions for common challenges like pest control and energy management. Insights into the technical expertise required for successful hydroponic farming. Exploration of future trends and technological advancements in hydroponics. Analysis of hydroponics' role in transforming global agriculture and enhancing food security. Whether you're a hobbyist, a commercial grower, or an academic researcher, "Hydroponics: The Future of Agriculture" is an invaluable guide to understanding and implementing this revolutionary farming method. This book not only provides the technical know-how but also inspires innovative thinking in the field of sustainable agriculture.

The 1991/92 Graduate Student Researchers Program, Including the Underrepresented Minority Focus Component

Author : United States. National Aeronautics and Space Administration
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis The 1991/92 Graduate Student Researchers Program, Including the Underrepresented Minority Focus Component by : United States. National Aeronautics and Space Administration

Download or read book The 1991/92 Graduate Student Researchers Program, Including the Underrepresented Minority Focus Component written by United States. National Aeronautics and Space Administration and published by . This book was released on 1991 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Intelligent Control for Agricultural Applications 2001

Author : H.K. Purwadaria
Publisher : Pergamon
ISBN 13 :
Total Pages : 340 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Intelligent Control for Agricultural Applications 2001 by : H.K. Purwadaria

Download or read book Intelligent Control for Agricultural Applications 2001 written by H.K. Purwadaria and published by Pergamon. This book was released on 2002-05-14 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Proceedings contains the papers presented at the second IFAC-CIGR Workshop on Intelligent Control For Agricultural Applications, held in Bali, Indonesia, 22-24 August 2001. The workshop provided a forum for the presentation and discussion of new results and approaches in the area of intelligent control application in agriculture and industry. The topics covered in the Proceedings range from precision farming to applications of control, neural networks and fuzzy algorithms in greenhouse technology, agricultural production and industrial processes. Also covered are quality evaluation using non-destructive methods such as ultrasonic, visible light and near infrared reflectance (NIR), as well as agricultural commodities, including fishery products as well as plants. Altogether over 50 papers are presented, including keynote papers by leading world experts.