Darryll J. Pines - Böcker
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3 produkter
3 produkter
3 200 kr
Skickas inom 10-15 vardagar
This paper reviews some of the important technical barriers that must be overcome to achieve truly efficient flying adaptive micro air vehicles (MAVs). As defined by the Defense Advanced Research Agency (DARPA), MAVs are vehicles with no length dimension greater than 6 inches. These vehicles typically weigh less than 100 grams and some can fly for approximately 30 minutes. Over the past decade significant progress has been made in developing these small-scale mechanical flying machines. However, there is still much work to be done if these vehicles are to approach the efficiency and performance of biological fliers. This paper reviews the status of current miniature mechanical flying machines and compares their performance with common biological flyers such as birds, and small insects. This comparison reveals that advances in aerodynamic efficiency, lightweight and adaptive wing structures, energy conversion/propulsion systems and flight control are required to match or exceed the performance of nature’s great flyers.
904 kr
Skickas inom 10-15 vardagar
This paper reviews some of the important technical barriers that must be overcome to achieve truly efficient flying adaptive micro air vehicles (MAVs). As defined by the Defense Advanced Research Agency (DARPA), MAVs are vehicles with no length dimension greater than 6 inches. These vehicles typically weigh less than 100 grams and some can fly for approximately 30 minutes. Over the past decade significant progress has been made in developing these small-scale mechanical flying machines. However, there is still much work to be done if these vehicles are to approach the efficiency and performance of biological fliers. This paper reviews the status of current miniature mechanical flying machines and compares their performance with common biological flyers such as birds, and small insects. This comparison reveals that advances in aerodynamic efficiency, lightweight and adaptive wing structures, energy conversion/propulsion systems and flight control are required to match or exceed the performance of nature’s great flyers.
Progress Machine
How Universities Will Drive Innovation into the Next Century
Inbunden, Engelska, 2027
343 kr
Kommande
Why research universities remain society's most powerful engines of progress.Public trust in higher education is under strain. Expertise is questioned, costs are rising, and universities face mounting political pressure. In The Progress Machine, Darryll J. Pines responds to this moment with a clear argument: research universities remain uniquely equipped to confront the world's most urgent challenges. Pines, who serves as the President of the University of Maryland, examines how institutions of higher learning have driven technological, economic, and cultural change for generations. He identifies five elements that make this possible: a sense of purpose shaped during formative college years; a commitment to scientific inquiry; communities strengthened by diversity and disagreement; an entrepreneurial orientation toward real-world problem-solving; and the arts and humanities, which supply meaning, ethics, and imagination. Rather than treating universities as abstract ideals, Pines grounds his argument in institutional practice. He addresses criticisms head-on, including concerns about affordability, free speech, political polarization, and public accountability. These challenges, he argues, demand reform rather than retreat—and reaffirm the responsibility of universities to serve society at large. The Progress Machine offers an optimistic vision at a moment of uncertainty and presents the research university not as a relic of the twentieth century, but as an adaptable institution capable of guiding innovation, sustaining democracy, and preparing future generations to meet complex global problems.