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Role of propagating ionisation fronts in semiconductor generation of sub-ps THz radiation
S.P. Jamison,B. Ersfeld,D.A. Jaroszynski 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
Observations of a directional asymmetry in the sub-ps THz radiation generated from ultrafast excitation of biased GaAs are presented. This asymmetry is inconsistent with the long standing and widely accepted surface-layer current-surge description of the THz emission process. Amodel based on propagating carrier excitation fronts during spectral-hole-burning is proposed to explain these observations. This model introduces new roles for the semiconductor optical and carrier transport properties in determining the efficiency of the THz generation process.
Slutskyy, Yuriy,Jamison, Christopher R.,Zhao, Peng,Lee, Juyeol,Rhee, Young Ho,Overman, Larry E. American Chemical Society 2017 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.139 No.21
<P>A short enantioselective synthesis of 6-substituted cis-2,8-dioxabicyclo[3.3.0]octan-3-ones is described. The pivotal step is coupling of a tertiary radical generated directly from a tertiary alcohol with a 3-chloro-5-alkoxybutenolide. This strategy is applied toward scalable 14-15 step syntheses of three rearranged spongian diterpenoids: cheloviolenes A and B and dendrillolide C.</P>
Lee, Frank,Jamison, David E.,Hurley, Robert W.,Cohen, Steven P. The Korean Pain Society 2014 The Korean Journal of Pain Vol.27 No.1
As our population ages and the rate of spine surgery continues to rise, the use epidural lysis of adhesions (LOA) has emerged as a popular treatment to treat spinal stenosis and failed back surgery syndrome. There is moderate evidence that percutaneous LOA is more effective than conventional ESI for both failed back surgery syndrome, spinal stenosis, and lumbar radiculopathy. For cervical HNP, cervical stenosis and mechanical pain not associated with nerve root involvement, the evidence is anecdotal. The benefits of LOA stem from a combination of factors to include the high volumes administered and the use of hypertonic saline. Hyaluronidase has been shown in most, but not all studies to improve treatment outcomes. Although infrequent, complications are more likely to occur after epidural LOA than after conventional epidural steroid injections.
Review Article : Epidural Lysis of Adhesions
( Frank Lee ),( David E Jamison ),( Robert W Hurley ),( Steven P Cohen ) 대한통증학회 2014 The Korean Journal of Pain Vol.27 No.1
As our population ages and the rate of spine surgery continues to rise, the use epidural lysis of adhesions (LOA) has emerged as a popular treatment to treat spinal stenosis and failed back surgery syndrome. There is moderate evidence that percutaneous LOA is more effective than conventional ESI for both failed back surgery syndrome, spinal stenosis, and lumbar radiculopathy. For cervical HNP, cervical stenosis and mechanical pain not associated with nerve root involvement, the evidence is anecdotal. The benefits of LOA stem from a combination of factors to include the high volumes administered and the use of hypertonic saline. Hyaluronidase has been shown in most, but not all studies to improve treatment outcomes. Although infrequent, complications are more likely to occur after epidural LOA than after conventional epidural steroid injections. (Korean J Pain 2014; 27: 3-15)
Effect of stress evolution on microstructural behavior in U-Mo/Al dispersion fuel
Jeong, G.Y.,Kim, Yeon Soo,Jamison, L.M.,Robinson, A.B.,Lee, K.H.,Sohn, Dong-Seong ELSEVIER 2017 JOURNAL OF NUCLEAR MATERIALS Vol.487 No.-
<P><B>Abstract</B></P> <P>U-Mo/Al dispersion fuel irradiated to high burnup at high power (high fission rate) exhibited microstructural changes including deformation of the fuel particles, pore growth, and rupture of the Al matrix. The driving force for these microstructural changes was meat swelling resulting from a combination of fuel particle swelling and interaction layer (IL) growth. In some cases, pore growth in the interaction layers also contributed to meat swelling. The main objective of this work was to determine the stress distribution within the fuel meat that caused these phenomena. A mechanical equilibrium between the stress generated by fuel meat swelling and the stress relieved by fission-induced creep in the meat constituents (U-Mo particles, Al matrix, and IL) was considered. Test plates with well-recorded fabrication data and irradiation conditions were used, and their post-irradiation examination (PIE) data was obtained. ABAQUS finite element analysis (FEA) was utilized to simulate the microstructural evolution of the plates. The simulation results allowed for the determination of effective stress and hydrostatic stress exerted on the meat constituents. The effects of fabrication and irradiation parameters on the stress distribution that drives microstructural evolutions, such as pore growth in the IL and Al matrix rupture, were investigated.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Post-irradiation data for irradiated miniplates were analyzed by using their optical microscopy images. </LI> <LI> ABAQUS finite element analysis (FEA) package was utilized to simulate the microstructural evolution of the selected plates. </LI> <LI> Stresses were assessed to analyze their effects on microstructural changes during irradiation. </LI> </UL> </P>
Garnsey, Michelle R.,Slutskyy, Yuriy,Jamison, Christopher R.,Zhao, Peng,Lee, Juyeol,Rhee, Young Ho,Overman, Larry E. American Chemical Society 2018 Journal of organic chemistry Vol.83 No.13
<P>The development of a convergent fragment coupling strategy for the enantioselective total syntheses of a group of rearranged spongian diterpenoids that harbor the <I>cis</I>-2,8-dioxabicyclo[3.3.0]octan-3-one unit is described. The key bond disconnection relies on a late-stage fragment coupling between a tertiary carbon radical and an electron-deficient alkene to unite two ring systems and form two new stereocenters, one of which is quaternary, in a stereoselective and efficient manner. This strategy is applied toward scalable 14-15 step syntheses of three rearranged spongian diterpenoids, cheloviolenes A and B, and dendrillolide C.</P> [FIG OMISSION]</BR>