The 2001 Benjamin Franklin medal in physics presented to Alan Guth, Ph.D. of Cambridge, Massachusetts

The Franklin Institute, Philadelphia, Pennsylvania, awarded the 2001 Benjamin Franklin Medal in Physics to Alan H. Guth for his efforts to advance our knowledge of physical science and its application of the inflationary scenario, in which the universe undergoes a rapid expansion in the first stages of the Big Bang.     

The 2001 Benjamin Franklin medal in chemistry presented to K. Barry Sharpless

The Franklin Institute, Philadelphia, PA awarded the 2001 Benjamin Franklin Medal in Chemistry to K. Barry Sharpless for his important innovative scientific contributions to the field of asymmetric catalytic oxidation, which resulted in highly enantioselective processes for the epoxidation, dihydroxylation and aminohydroxylation of olefins.     

The finite element method and earthquake engineering: The 2006 Benjamin Franklin Medal in civil engineering presented to Ray W. Clough

The Franklin Institute, Philadelphia, PA awarded the 2006 Benjamin Franklin Medal in civil engineering to Ray W. Clough for revolutionizing engineering and scientific computation, and engineering design methods through his formulation and development of the finite element method, and for his innovative leadership in applying the method to the field of earthquake engineering with special emphasis on the seismic performance of dams.     

Reprint of: The 2011 Benjamin Franklin medal in earth and environmental science presented to Jillian F. Banfield

The Franklin Institute, Philadelphia, Pennsylvania awards the 2011 Benjamin Franklin Medal in Earth and Environmental Science to Professor Jillian F. Banfield for her pioneering work in the fields of geochemistry and environmental microbiology, in particular her discoveries of the underlying principles of mineral formation and alteration by microbes and her efforts to advance the understanding of the form, composition, and distribution of minerals in the presence of living organisms.     

The 2004 Benjamin Franklin Medal in Engineering presented to Robert E. Newnham

The Franklin Institute, Philadelphia, Pennsylvania, awarded the Benjamin Franklin Medal in Engineering to Robert E. Newnham for his invention of multiphase piezoelectric transducers and their spatial architecture which revolutionized the field of acoustic imaging. The background and significance of his research is presented. Attention is focused on the impact his research prompted in the field of medical imaging, in particular non-invasive, real-time visualization of internal tissue and organs of human body using ultrasound energy. Societal impact of Dr. Newnham's work is also pointed out.     

Developing the Agrobacterium Ti plasmid as a vector for plant genetic engineering: the 2002 Benjamin Franklin Medal in life sciences presented to Mary-Dell Chilton

The Franklin Institute, Philadelphia, Pennsylvania, awarded the 2002 Benjamin Franklin Medal in Life Sciences to Mary-Dell Chilton for her key discoveries and wide-ranging contributions in the development of the Agrobacterium tumefaciens Ti plasmid as a major vector system for plant genetic engineering.     

The Benjamin Franklin Medal in Life Science presented to Judah Folkman

The Franklin Institute, Philadelphia, Pennsylvania awarded the 2001 Benjamin Franklin Medal in Life Science to Judah Folkman for his founding of the field of angiogenesis research and demonstration that angiogenesis is a necessary factor in the conversion of abnormal cells to malignant tumors.     

The 2011 Benjamin Franklin Medal in Physics presented to Nicola Cabibbo

The Franklin Institute of Philadelphia awards the 2011 Benjamin Franklin Medal in Physics to Nicola Cabibbo for his pioneering work in the field of elementary particle physics, with special emphasis on his role in furthering our understanding of the underlying symmetries that relate one elementary particle interaction to another.     

The 2005 Benjamin Franklin medal in physics presented to Yoichiro Nambu

The Franklin Institute, Philadelphia, Pennsylvania, awarded the 2005 Benjamin Franklin medal in physics to Yoichiro Nambu for his seminal contributions which introduced the modern concept of broken symmetry to elementary particle physics, for his invention of the particle property called color which is the key to quark confinement, and for his ground-breaking work on the theory of string-like elementary particles.     

The 2001 Benjamin Franklin Medal in Earth Science presented to Rob Van der Voo

The Franklin Institute, Philadelphia, Pennsylvania, awarded the 2001 Benjamin Franklin Medal in Earth Science to Rob Van der Voo for his outstanding contributions to the field of paleomagnetism and his reconstruction of ancient continental positions that have lead to a better understanding of plate tectonic processes for the past billion years of Earth history.     

The 2005 Benjamin Franklin Medal in Electrical Engineering presented to Andrew Viterbi

The Franklin Institute, Philadelphia, PA, awarded the 2005 Benjamin Franklin Medal in Electrical Engineering to Andrew Viterbi for developing an efficient technique that has advanced the design and implementation of modern space and wireless communication systems. He also was a leader in the development of Code Division Multiple Access wireless technologies.     

Molecular mechanics—modeling molecular structure and energetics: the 2002 Benjamin Franklin Medal in Chemistry presented to Norman Allinger

The Franklin Institute of Philadelphia awarded the 2002 Benjamin Franklin Medal in Chemistry to Norman L. Allinger for his pioneering work in computational chemistry in the field of molecular mechanics with his development of the MM series of force fields, their widespread application to the fundamental understanding of molecular structure and energetics, and their implementation as a significant tool to practicing chemists.     

The 2004 Benjamin Franklin Medal in Mechanical Engineering presented to Roger Bacon

The Franklin Institute, Philadelphia, PA, awarded the 2004 Benjamin Franklin Medal in Mechanical Engineering to Roger Bacon for his fundamental research on the production of graphite whiskers and the determination of their microstructure and properties, for his pioneering development efforts in the production of the world's first continuously processed carbon fibers and the world's first high modulus and high-strength carbon fibers, and for his contributions to the development of carbon fibers from alternative starting materials.     

The 2008 Benjamin Franklin medal for physics is presented to Dr. Deborah Jin

The Benjamin Franklin Medal for Physics is awarded to Dr. Deborah Jin (JILA, NIST and the University of Colorado) “in recognition of her pioneering investigations into the quantum properties of an ultra-cold gas of fermionic atoms and, in particular, for her creation of the first degenerate Fermi gas of atoms”.     

The 2004 Benjamin Franklin Medal in Chemistry presented to Harry B. Gray

The Franklin Institute, Philadelphia, Pennsylvania, awarded the 2004 Benjamin Franklin Medal in Chemistry to Harry B. Gray for his pioneering contributions in the field of electron transfer in metalloproteins. In a series of elegant and challenging experiments beginning in the late 70s, Gray and his coworkers have shown that the transfer of electrons in metalloproteins can proceed over long distances (~ 20 Å) and at fast rates. These experiments have involved the regiospecific functionalization of structurally characterized electron transfer proteins with ruthenium complexes, coupled with laser excitation and transient spectroscopy. Probing the effects of thermodynamic driving force, temperature, donor-acceptor distance and electronic coupling, Gray has shaped our detailed current understanding of the principles governing biological electron flow. The mechanism of electron transfer has been identified as electron tunneling mediated by the molecules separating donor and acceptor. Tunneling timetables have been established for various intervening media. Important biological processes like respiration and photosynthesis depend on facile electron transfer, and Gray's contribution serves as the fundamental basis for understanding these and many related reactions.     

The 2003 Benjamin Franklin Medal in Earth Science presented to Norman Phillips and Joseph Smagorinsky

The Franklin Institute, Philadelphia, Pennsylvania, awarded the 2003 Benjamin Franklin medal in Earth Science to Norman Phillips and Joseph Smagorinsky for their seminal and pioneering studies that led to the first successful predictions of the weather using numerical methods, and to an understanding of the general circulation of the atmosphere. In addition, Smagorinsky played a leading role in establishing the current global observational network for the atmosphere, and Phillips’ leadership fostered the development of effective methods for the use of observations in data assimilation systems.     

After the double helix: Rosalind Franklin's research on Tobacco mosaic virus

Rosalind Franklin is best known for her informative X-ray diffraction patterns of DNA that provided vital clues for James Watson and Francis Crick's double-stranded helical model. Her scientific career did not end when she left the DNA work at King's College, however. In 1953 Franklin moved to J. D. Bernal's crystallography laboratory at Birkbeck College, where she shifted her focus to the three-dimensional structure of viruses, obtaining diffraction patterns of Tobacco mosaic virus (TMV) of unprecedented detail and clarity. During the next five years, while making significant headway on the structural determination of TMV, Franklin maintained an active correspondence with both Watson and Crick, who were also studying aspects of virus structure. Developments in TMV research during the 1950s illustrate the connections in the emerging field of molecular biology between structural studies of nucleic acids and of proteins and viruses. They also reveal how the protagonists of the "race for the double helix" continued to interact personally and professionally during the years when Watson and Crick's model for the double-helical structure of DNA was debated and confirmed.     

The 2011 Benjamin Franklin Medal in Chemistry Presented to Kyriacos C. Nicolaou

The Franklin Institute, Philadelphia, Pennsylvania, awards the 2011 Benjamin Franklin Medal in Chemistry to Professor Kyriacos C. Nicolaou for his extraordinary contributions to chemistry, biology, and medicine through the advancement of the art of synthesis as exemplified by the elegant total syntheses of some of nature's most complex biologically active molecules. Nicolaou is recognized as a world leader in the field of total synthesis for his work in chemical synthesis and chemical biology. His total syntheses are legendary, distinguished for their elegance and practicality. Among his most celebrated achievements are the total syntheses of calicheamicin γ₁^I, Taxol^®, brevetoxin B, vancomycin, and thiostrepton. The impact of his work transcends total synthesis, for it often leads to the discovery and invention of new synthetic strategies and technologies as well as biological tools and drug candidates, thereby facilitating discoveries in biology and medicine. Nicolaou's influence on science and society extends beyond his research discoveries. Through his didactic lectures and writings, he motivates and inspires students into the sciences and informs the public about the importance of science and education to society.     

密码学技术在网络信息安全中的应用

现代计算机网络面临着信息泄露、黑客攻击、病毒感染等多种威胁,使用密码学可以保障信息的机密性和完整性,防止信息被篡改、伪造。本文概括介绍了密码学在现代网络信息安全体系建设中的地位,同时对如何合理地利用密码学技术来保障网络信息安全进行了分析。     

Controllability of Volterra-Fredholm type systems in Banach spaces

We show the results in Chalishajar [Controllability of mixed Volterra-Fredholm-type integro-differential systems in Banach space, J. Franklin Inst. 344(1) (2007) 12-21] and Chang and Chalishajar [Controllability of mixed Volterra-Fredholm type integro-differential systems in Banach space, J. Franklin Inst., doi:10.1016/j.jfranklin.2008.02.002] are only valid for ordinary differential control systems. As a result the examples provided cannot be recovered as applications of the abstract results.