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An Efficient Algorithm for Real-Time 3D Terrain Walkthrough
Hesse, Michael,Gavrilova, Marina L. Society for Computational Design and Engineering 2003 International Journal of CAD/CAM Vol.3 No.1
The paper presents an efficient algorithm based on ROAM for visualization of large scale terrain models in real-time. The quality and smoothness of the terrain data visualization within a 3D interactive environment is preserved, while the complexity of the algorithm is kept on a reasonable level. The main contribution of the paper is an introduction of a number of efficient techniques such as implicit coordinates method within the patch array representing ROAM and the viewpoint dependent triangle rendering method for dynamic level of detail (LOD) updates. In addition, the paper presents experimental comparison of a variety of culling techniques, including a newly introduced method: relational position culling. These techniques are incorporated in the visualization software, which allows to achieve more realistic terrain representation and the real-time level of detail reduction.
Bacterial Nanofluidic Structures for Medicine and Engineering
Hesse, William R.,Freedman, Kevin J.,Yi, Dong Kee,Ahn, Chi Won,Kim, MinJun WILEY-VCH Verlag 2010 Small Vol.6 No.8
<P>Bacteria are microscopic, single-celled organisms that utilize a variety of nanofluidic structures. One of the best known and widely used nanofluidic structures that are derived from bacteria is the α-hemolysin pore. This pore, which self-assembles in lipid bilayers, has been used for a wide variety of sensing applications, most notably, DNA sensing. Synthetic pores drilled in a wide variety of materials, such as silicon nitride and polymers have been developed that use inspiration from the α-hemolysin pore. Higher-aspect-ratio nanofluidic structures, akin to nanotubes, are also synthesized by bacteria. Examples of such structures include those that are associated with bacterial transport apparatus, such as pili, and are used by bacteria to facilitate the transfer of genetic material from one bacterium to another. Flagella, and its associated structures, such as the rod and hook, are also tubular nanostructures, through which the protein, flagellin, travels to assemble the flagellum. Genetic engineering allows for the creation of modified bacterial nanopores and nanotubes that can be used for a variety of medical and engineering purposes.</P><P>Frontispiece images reproduced with permission from References 55,8,85. Copyrights 1996, American Association for the Advancement of Scicnce, 2009, Elsevier, and 2007, Institute of Physics, respectively.</P><P> <img src='wiley_img_2010/16136810-2010-6-8-SMLL200901576-gra001.gif' alt='wiley_img_2010/16136810-2010-6-8-SMLL200901576-gra001'> </P> <B>Graphic Abstract</B> <P>Bacteria provide scientists and engineers with a multitude of nanoscale structures that may be engineered, adapted, or used for inspiration to create new medical diagnostic techniques or therapies. This Review highlights recent advances in both nanopore technologies and emerging technologies that make use of bacterial nanotubes. In addition, synthetic techniques that have striking similarity to bacterial nanofluidics are discussed. <img src='wiley_img_2010/16136810-2010-6-8-SMLL200901576-content.gif' alt='wiley_img_2010/16136810-2010-6-8-SMLL200901576-content'> </P>
Paclitaxel-albumin interaction in view of molecular engineering of polymer-drug conjugates
Hess, Michael,Jo, Byung-Wook,Wunderlich, Stefan De Gruyter 2009 Pure and Applied Chemistry Vol.81 No.3
<P>The interaction of water-soluble polymer conjugates of the anticancer agent paclitaxel and albumin as model protein has been investigated using fluorescence spectroscopy and NMR. Drugs and drug conjugates can enter the hydrophobic core of albumin; the kinetics of the interaction with the fluorophore, however, differs. Given the information about the steric situation of the formed complexes, some aspects of molecular engineering of the drug are discussed.</P>
CHILES: H i morphology and galaxy environment at <i>z</i> = 0.12 and <i>z</i> = 0.17
Hess, Kelley M,Luber, Nicholas M,Ferná,ndez, Ximena,Gim, Hansung B,van Gorkom, J H,Momjian, Emmanuel,Gross, Julia,Meyer, Martin,Popping, Attila,Davies, Luke J M,Hunt, Lucas,Kreckel, Kathryn,Luce Oxford University Press 2019 MONTHLY NOTICES- ROYAL ASTRONOMICAL SOCIETY Vol.484 No.2
Hess, David,Rane, Anandkumar,deMello, Andrew J.,Stavrakis, Stavros American Chemical Society 2015 ANALYTICAL CHEMISTRY - Vol.87 No.9
<P>Droplet-based microfluidic systems offer a range of advantageous features for the investigation of enzyme kinetics, including high time resolution and the ability to probe extremely large numbers of discrete reactions while consuming low sample volumes. Kinetic measurements within droplet-based microfluidic systems are conventionally performed using single point detection schemes. Unfortunately, such an approach prohibits the measurement of an individual droplet over an extended period of time. Accordingly, we present a novel approach for the extensive characterization of enzyme–inhibitor reaction kinetics within a single experiment by tracking individual and rapidly moving droplets as they pass through an extended microfluidic channel. A series of heterogeneous and pL-volume droplets, containing varying concentrations of the fluorogenic substrate resorufin β-<SMALL>d</SMALL>-galactopyranoside and a constant amount of the enzyme β-galactosidase, is produced at frequencies in excess of 150 Hz. By stroboscopic manipulation of the excitation laser light and adoption of a dual view detection system, “blur-free” images containing up to 150 clearly distinguishable droplets per frame are extracted, which allow extraction of kinetic data from all formed droplets. The efficiency of this approach is demonstrated via a Michaelis–Menten analysis which yields a Michaelis constant, <I>K</I><SUB>m</SUB>, of 353 μM. Additionally, the dissociation constant for the competitive inhibitor isopropyl β-<SMALL>d</SMALL>-1-thiogalactopyranoside is extracted using the same method.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancham/2015/ancham.2015.87.issue-9/acs.analchem.5b00766/production/images/medium/ac-2015-00766c_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ac5b00766'>ACS Electronic Supporting Info</A></P>