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Hyperfine structure of Sc@C<sub>82</sub> from ESR and DFT
Morley, G W,Herbert, B J,Lee, S M,Porfyrakis, K,Dennis, T J S,Nguyen-Manh, D,Scipioni, R,van Tol, J,Horsfield, A P,Ardavan, A,Pettifor, D G,Green, J C,Briggs, G A D IOP Pub 2005 Nanotechnology Vol.16 No.11
<P>The electron spin <I>g</I>-?and hyperfine tensors of the endohedral metallofullerene Sc@C<SUB>82</SUB> are anisotropic. Using electron spin resonance (ESR) and density functional theory (DFT), we can relate their principal axes to the coordinate frame of the molecule, finding that the <I>g</I>-tensor is not axially symmetric. The Sc bond with the cage is partly covalent and partly ionic. Most of the electron spin density is distributed around the carbon cage, but 5% is associated with the scandium d<SUB><I>yz</I></SUB> orbital, and this drives the observed anisotropy. </P>
Dennis Grech,Zhifeng Li,Patrick Morcillo,Evelyne Kalyoussef,David D. Kim,Alex Bekker,Luis Ulloa 사단법인약침학회 2016 Journal of Acupuncture & Meridian Studies Vol.9 No.5
Neuronal stimulation improves physiological responses to infection and trauma, but the clinical potential of this strategy is unknown. We hypothesized that transdermal neural stimulation through low-frequency electroacupuncture might control the immune responses to surgical trauma and expedite the postoperative recovery. However, the efficiency of electroacupuncture is questioned due to the placebo effect. Here, electroacupuncture was performed on anesthetized patients to avoid any placebo. This is a prospective double-blinded pilot trial to determine whether intraoperative electroacupuncture on anesthetized patients improves postoperative recovery. Patients with electroacupuncture required 60% less postoperative analgesic, even they had pain scores similar to those in the control patients. Electroacupuncture prevented postoperative hyperglycemia and attenuated serum adrenocorticotropic hormone in the older and heavier group of patients. From an immunological perspective, electroacupuncture did not affect the protective immune responses to surgical trauma, including the induction of interleukin-6 and interleukin-10. The most significant immunological effect of electroacupuncture was enhancing transforming growth factor-β1 production during surgery in the older and lighter group of patients. These results suggest that intraoperative electroacupuncture on anesthetized patients can reduce postoperative use of analgesics and improve immune and stress responses to surgery.
Dennis D. Trinidad 경남대학교 극동문제연구소 2007 ASIAN PERSPECTIVE Vol.31 No.2
The article examines the recent changes in Japan’s official development assistance (ODA) in Southeast Asia in response to domestic and international challenges after the cold war. It argues that Japan is in a position where it has to choose between “spending” and “earning” strategies in the disbursement of aid. Influenced by external and internal developments, Japan has tilted toward a “spending” approach over the last decade. Due to a limited ODA budget, Japan has to optimize the use of aid and disburse it more strategically. Also significant is the noticeable across-the-board increase in the grant allocation to Southeast Asia and Vietnam’s emergence as a major recipient.
Electrical, electronic and optical properties of amorphous indium zinc tin oxide thin films
Denny, Y.R.,Lee, K.,Seo, S.,Oh, S.K.,Kang, H.J.,Yang, D.S.,Heo, S.,Chung, J.G.,Lee, J.C. New York] ; North-Holland 2014 APPLIED SURFACE SCIENCE - Vol.315 No.-
The electrical and optical properties of amorphous indium zinc tin oxide (a-IZTO) thin films were examined as a function of chemical composition. Effects of Sn/Zn composition ratio and In content on the electrical and optical properties of a-IZTO thin films are discussed. The electron mobility of thin film transistors with higher Sn/Zn composition ratio was dramatically improved due to a shorter zinc-zinc separation distance. The thin film transistor with the composition of In:Zn:Sn=20:48:32 exhibits a high mobility of 30.6cm<SUP>2</SUP>V<SUP>-1</SUP>s<SUP>-1</SUP> and a high on-off current ratio of 10<SUP>9</SUP>.
Institutional Mismatch and Chinese Aid in the Philippines: Challenges and Implications
( Dennis D. Trinidad ) 경남대학교 극동문제연구소 2016 ASIAN PERSPECTIVE Vol.40 No.2
Why is Chinese aid attractive to some recipient countries and controversial in others? This study advances the idea that Chinese aid is more attractive in countries that lack or have weak Development Assistance Committee.based aid institutions. When there is a mismatch between a non-DAC donor and a recipient country’s aid regimes, legal and political problems may arise, as the case of Chinese aid to the Philippines in the 2000s demonstrates. As a recipient country, the Philippines is more accustomed to DAC-based rules and practices governing development aid processes, while as a donor country, China’s aid institutions evolved outside the DAC club. The controversies that subsequently arose from institutional mismatch created a public perception that Chinese aid was illegal and prone to corruption, undermining China’s aid objectives.
Dennis D. Keiser,JAN-FONG JUE,BRANDON D. MILLER,JIAN GAN,ADAM B. ROBINSON,PAVEL MEDVEDEV,JAMES MADDEN,DAN WACHS,MITCH MEYER 한국원자력학회 2014 Nuclear Engineering and Technology Vol.46 No.2
In order to investigate how the microstructure of fuel/matrix-interaction (FMI) layers change during irradiation, differentU–7Mo dispersion fuel plates have been irradiated to high fission density and then characterized using scanning electronmicroscopy (SEM). Specifially, samples from irradiated U–7Mo dispersion fuel elements with pure Al, Al–2Si and AA4043(~4.5 wt.%Si) matrices were SEM characterized using polished samples and samples that were prepared with a focused ionbeam (FIB). Features not observable for the polished samples could be captured in SEM images taken of the FIB samples. Forthe Al matrix sample, a relatively large FMI layer develops, with enrichment of Xe at the FMI layer/Al matrix interface andevidence of debonding. Overall, a significant penetration of Si from the FMI layer into the U–7Mo fuel was observed forsamples with Si in the Al matrix, which resulted in a change of the size (larger) and shape (round) of the fission gas bubbles. Additionally, solid fission product phases were observed to nucleate and grow within these bubbles. These changes in thelocalized regions of the microstructure of the U–7Mo may contribute to changes observed in the macroscopic swelling of fuelplates with Al–Si matrices.
Keiser, Dennis D. Jr.,Jue, Jan-Fong,Miller, Brandon D.,Gan, Jian,Robinson, Adam B.,Medvedev, Pavel,Madden, James,Wachs, Dan,Meyer, Mitch Korean Nuclear Society 2014 Nuclear Engineering and Technology Vol.46 No.2
In order to investigate how the microstructure of fuel/matrix-interaction (FMI) layers change during irradiation, different U-7Mo dispersion fuel plates have been irradiated to high fission density and then characterized using scanning electron microscopy (SEM). Specifially, samples from irradiated U-7Mo dispersion fuel elements with pure Al, Al-2Si and AA4043 (~4.5 wt.%Si) matrices were SEM characterized using polished samples and samples that were prepared with a focused ion beam (FIB). Features not observable for the polished samples could be captured in SEM images taken of the FIB samples. For the Al matrix sample, a relatively large FMI layer develops, with enrichment of Xe at the FMI layer/Al matrix interface and evidence of debonding. Overall, a significant penetration of Si from the FMI layer into the U-7Mo fuel was observed for samples with Si in the Al matrix, which resulted in a change of the size (larger) and shape (round) of the fission gas bubbles. Additionally, solid fission product phases were observed to nucleate and grow within these bubbles. These changes in the localized regions of the microstructure of the U-7Mo may contribute to changes observed in the macroscopic swelling of fuel plates with Al-Si matrices.
Leigh, D.F.,Owen, J.H.G.,Lee, S.M.,Porfyrakis, K.,Ardavan, A.,Dennis, T.J.S.,Pettifor, D.G.,Briggs, G.A.D. Elsevier 2005 Chemical physics letters Vol.414 No.4
<P><B>Abstract</B></P><P>Two different structural isomers of Nd@C<SUB>82</SUB> have been isolated using two-stage high-performance liquid chromatography. Their molecular orbital structures have been studied by a combination of scanning tunneling microscopy (STM) and density functional theory (DFT). Matching filled and empty-states STM images to DFT calculations allowed us to distinguish directly between the two isomers on the surface.</P>