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There must be ' <' and '> ' ordering operators having the same left and right input datatypes as the mergejoinable operator itself . Devoted to increasing awareness of engineering , she works throughout the year speaking at local schools , participating in science and career fairs , and attending professional development seminars , all of which contribute to the education of the public about science , engineering , and technology careers . As leaders in science , engineering , and education , we are concerned with the suggestion that the status quo for women in science and engineering may be natural , inevitable , and unrelated to social factors . Examples in this section can also be found in funcs.sql and funcs.c . It is time to create a broader awareness of those proven and effective means , including institutional policies and practices , which enable women and other underrepresented groups to step beyond the historical barriers in science and engineering . In our daily work thus far , we have regularly invited all the international and regional institutions involved in trade and development to participate . This will provide de-watering and maintenance on the Jonesville Lock , a vital link in navigation and commerce on the Ouachita / Black Waterway .