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1.
We propose a realistic model of the optical properties of silver, in which inter-band transition with a threshold energy of ~4 eV is described phenomenologically by an ensemble of oscillators with same damping constant and a certain distribution of resonant frequencies from the interband transition threshold to infinity. The contribution of the conduction electrons in the dielectric function is determined by the Drude formula. The proposed model actually contains the features of both the Drude-Lorentz model (Rakicet al., 1998) and Tauc-Lorentz model (Jian-Hong Qiu et al., 2005). However, unlike these works proposed model contains only six fitting parameters, with the square root of the mean square deviation of the absorption coefficient and refractive index of silver from the experimental values in the range of 0.6–6.0 nm being of the order of 0.05. 相似文献
2.
Allowing users to actively participate in the development and implementation of a new IS is supposed to increase their satisfaction with it. This type of participation, representing aspects relating to distributive and procedural justice, is increasingly impractical in current organizational settings, because many IS are used by thousands of employees and having them involved is impossible. Nonetheless, there are still benefits to be gained in other ways. Extrapolating from interactional justice, we proposed a passive participation method of engaging users. Its effect was tested in a large company in the USA and proved effective. Interactional justice, the perception of fairness in the way that people were treated at an interpersonal level, was found to increase user assessment of the value of their IS. Implications and expansions to interactional justice theory and how this antecedent affects IS implementation are discussed. 相似文献
3.
Melikyan H Hovsepyan A Sargsyan T Yoon Y Yoo H Babajanyan A Lee K 《Ultramicroscopy》2008,108(10):1030-1033
We investigated the electromagnetic properties of metals of iron, nickel, cobalt, aluminum, gold, copper, silver, and permalloy thin films on SiO(2) substrates using a near-field microwave microprobe. The electromagnetic properties of metal sheets were estimated by measuring the microwave reflection coefficient S(11) and compared with the theoretical values. We observed the hysteresis behavior of permalloy thin films on SiO(2) substrates using a near-field scanning microwave microprobes (NSMM) system. Experimental results are in good agreement with the theoretical model of transmission theory. In order to better characterize the electromagnetic properties of metals and magnetic metals instead of the usual method, we take advantage of the noncontact microprobing evaluation capabilities using a near-field microwave. 相似文献
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Jagadeesh Nagendra Manda Milica Markovic Prof. Ellen M. Zimmermann Prof. Shimon Ben-Shabat Prof. Arik Dahan Prof. Aaron Aponick 《ChemMedChem》2020,15(17):1639-1644
Novel phospholipid (PL)-cyclosporine conjugates were prepared and studied as potential prodrugs for inflammatory bowel disease (IBD). Our approach relies on phospholipase A2 (PLA2), which is overexpressed in the inflamed intestinal tissues, as the prodrug activator to potentially release cyclosporine at the site of inflammation. PL-cyclosporine prodrug conjugates with methylene linkers of various lengths between the sn-2 position of the PL and cyclosporine were synthesized and evaluated for in vitro activation. Surprisingly, despite previous work indicating that conjugates with six methylene linkers between the lipid and drug would suffer rapid enzymatic hydrolysis, with cyclosporine this was not observed. However, compounds with longer linkers (n=10, 12 methylene units) display complete release of the drug by PLA2-catalyzed hydrolysis, thus demonstrating the importance and profound impact of structural fine-tuning. This study represents a proof-of-concept for our hypothesis and a first step towards a truly targeted IBD treatment with cyclosporine that could be administered throughout the GI tract. 相似文献
6.
Arsen Babajanyan Harutyun Melikyan Jerome Carnis Youngwoon Yoon Hanju Lee Hyung Keun Yoo Kiejin Lee Barry Friedman 《Synthetic Metals》2011,161(11-12):931-936
Direct probing of the conductivity distribution in organic materials is motivated by the need to obtain a deeper understanding of carrier behavior in organic thin-film transistors (OTFT), organic electro-luminescent devices, organic photoconductors, and organic biosensors. Here we used a near-field scanning microwave microscope to visualize conductivity profiles in OTFT channel. Applying this technique to pentacene field-effect transistors has revealed changes of the conductivity distribution in the channel arising from the development and exhaustion of an accumulated charge region. The electric field profiles, the complementary image of conductivity profiles, which are visualized by using an optical second harmonic generation method, support the results. We anticipate that direct observation by this microwave method will find wide application in measurement of carrier conductivity in organic and nonorganic materials. 相似文献
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A Multi-Level Approach to Measuring the Benefits of an Erp System in Manufacturing Firms 总被引:1,自引:0,他引:1
This research study examines associations between the business characteristics of manufacturing firms and their perceived benefits from ERP system investments. the perceived ERP benefits are measured at two levels: (1) an enterprise level and (2) a specific IT module level. the perceived value for ERP investments was consistently better explained at the specific IT module level. 相似文献
10.
V. O. Chaltikyan E. M. Laziev A. O. Melikyan A. O. Vardanyan 《Journal of Modern Optics》2013,60(7):919-929
A new single-shot multibeam cross-correlation technique is proposed for the measurement of a bunched electron beam temporal structure. As an optical laser pulse modulated by the Coulomb field of the electron bunch in an electro-optical crystal, it is proposed to use a non-uniform pulse modulated both in time and in space. In the proposed technique, measurement of the time profile is realized during a single laser shot. In this case, as a result of electro-optical modulation of a non-uniform femtosecond pulse, the information on the time profile of the Coulomb field is contained in only the spatially shifted spectral components of the modulated pulse. 相似文献