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Presence Vision Innovation Success Seismic Insight Welcome Seismic Insight , Inc. is a waveform research and consulting company focused on finding direct hydrocarbon indicators ( DHI 's ) and revealing other hidden geologic information for oil and gas companies . Evaluation of these tools will be made using at least five 3-D seismic surveys , multiple 2-D seismic surveys and a large database of geological , petrophysical and production information . Since random initial conditions were used , there are fronts between the left-handed and right-handed ideal helixes in the above figure . Dr. Ulrik Gether and collaborators have previously identified an endogenous high affinity zinc binding site on the DAT which involves the close association in space of histidine at position 193 ( extracellular loop 2 ) , histidine 375 ( transmembrane helix 7 ) , and glutamate 396 ( extracellular loop 4 , top of transmembrane helix 8 ) . This narrower definition excludes such techniques as sonar , geomagnetic and seismic sounding , as well as medical imaging , but includes a wide and fairly coherent set of techniques , often known by the alternative name of Earth Observation , that form the subject of this book . Section 3.0presents the specific data for the lifeline systems and the seismic data and codes available to determine the earthquake impact on those lifelines . MsbA is organized as a homodimer with each subunit containing six transmembrane - helices and a nucleotide-binding domain . Gene targeting via triple helix formation . The two-fold symmetry involving the 2nd and 3rd alpha helices does _ not _ show up as an obvious sequence repeat , though it could reflect an ancient divergent internal duplication still visisble in the tertiary structure . These classifications , which are based on secondary structural compositions and topology are the " alpha " helices , " beta " strands , and two mixes of helices and strands , one called " alpha plus beta " and the other " alpha slash beta . Helix is one of the haves , at least at first . " " Media representatives are welcome to join Double Helix members and friends all around Australia who will be enjoying a science bonanza , " says Double Helix Coordinator Rebecca Scott . A fieldtrip featuring the seismic retrofit of historic structures will also be included .