Multispectral Image Processing for Plants

The development of a machine vision system to monitor plant growth and health is one of three essential steps towards establishing an intelligent system capable of accurately assessing the state of a controlled ecological life support system for long-term space travel. Besides a network of sensors, simulators are needed to predict plant features, and artificial intelligence algorithms are needed to determine the state of a plant based life support system. Multispectral machine vision and image processing can be used to sense plant features, including health and nutritional status

The effects of the geosynchronous energetic particle radiation environment on spacecraft charging phenomena

The energetic electron environment at the geosynchronous orbit is responsible for a variety of adverse charging effects on spacecraft components. The most serious of these is the degradation and failure of a complementary-metal-oxide-semiconductor (CMOS) electronic components as a result of internal charge-buildup induced by the energetic electrons. Efforts to accurately determine the expected lifetime of these components in this orbit are hampered by the lack of detailed knowledge of the electron spectrum and intensity, particularly of the more penetrating energies greater than 1.5 MeV. This problem is illustrated through the calculation of the dose received by a CMOS device from the energetic electrons and associated bremsstrahlung as a function of aluminum shielding thickness using the NASA AE-6 and the Aerospace measured electron environments. Two computational codes which were found to be in good agreement were used to perform the calculations. For a given shielding thickness the dose received with the two radiation environments differ by as much as a factor of seven with a corresponding variation in lifetime of the CMOS

High resolution vertical profiles of wind, temperature and humidity obtained by computer processing and digital filtering of radiosonde and radar tracking data from the ITCZ experiment of 1977

Results are presented from computer processing and digital filtering of radiosonde and radar tracking data obtained during the ITCZ experiment when coordinated measurements were taken daily over a 16 day period across the Panama Canal Zone. The temperature relative humidity and wind velocity profiles are discussed

Psychological Foundations of Education

EDUC 6240 is an examination and application of foundational and emerging psychological theories and research which shape educators’ understanding of their students, as well as their instructional decision making. The course examines topics such as child development, motivation, sociocultural identity, cognition, memory, assessment, and classroom management

Fresh Water: Environment or Trade

fresh water and trade, fresh water and environmen

Taking Responsibility for Transboundary Environmental Effects

There are recent encouraging examples of cooperation in international environmental affairs. However, nations have made only disappointing progress in developing international law to assign liability among nations for environmental injury. One positive step was taken when the U.N.-sponsored World Commission on Environment and Development appointed an Experts Group on Environmental Law. This Article describes and critiques the report of the Experts Group, taking some guidance from its principles, but finding many conclusions that should be changed. The Article proposes that international law should include expanded strict liability concepts applied to actual damages from environmental injury