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<br />analysis of variance. However, all of them have serious method()logical <br />problems (e.g., biased controls, no randomization, inappropriate tests, <br />etc.), and thus they can only be regarded as crude assessments. <br /> <br />· RRRDI appears to have recognized these problems and has stated: <br /> <br />"We recognize the need to upgrade the acquisition, processing, <br />and interpretation of data related to the warm cloud modif~ication <br />activities. <br /> <br />"A goal of the RRRDI is that the program be conducted and E~valuated on <br />a scientifically-sound level." <br /> <br />G. Research and Development Activities <br /> <br />Although the primary emphasis of the RRROI program is operationcll cloud <br />seeding for precipitation enhancement, some research and development pro- <br />jects are undertaken as time and funds become available. A number of these <br />projects were reported upon at liThe First ASEAN Seminar on Weather <br />Modification and Evaluation Techniques," Chiang Mai, Thailand, December <br />1984, which was sponsored by the World Meteorological Organization and the <br />United Nations Development Program. Volume 3 of the Proceedings of the <br />Seminar (RRRDI, 1984) presents these reports including studies on the <br />characteristics of eight chemicals used in cloud seeding (Padun9chit and <br />Rachaneewan, 1984), field comparisons of seven chemical substanc:es to <br />disperse fog (Saneh, 1984), the effects of meteorology and seeding chemi- <br />cals on ground precipitation (Subongkot, 1984), and the possible effects of <br />the seeding chemicals on personal health (Prakob, 1984). More recently <br />there has been work on the area of effect due to cloud seeding (Subongkot, <br />1985) and on the use of small solid propellant rockets for the seeding of <br />clouds. <br /> <br />The "Present Status of Royal Rainmaking in Thalland" (RRRDI, 1986) has <br />listed the following research and development activities for the RRRDI: <br /> <br />o Development of rainmaking techniques <br /> <br />- In-cloud seeding by rockets (launched from ground). <br />- Chemical dispersion (from mountain top into cloud bases). <br />- Supercooled chemical seeding (under cloud bases). <br /> <br />o Development of rainmaking chemicals <br /> <br />. <br />. <br /> <br />- T-1 Chemical. <br />- Calcium Oxide. <br />- Charged solution of endothermic chemicals. <br />- Improve hygroscopic properties of endotherm'lc chemicals. <br /> <br />~ <br /> <br />" <br />. <br /> <br />35 <br />