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Vakhtomin YB, Finkel MI, Antipov SV, Smirnov KV, Kaurova NS, Drakinskii VN, et al. The gain bandwidth of mixers based on the electron heating effect in an ultrathin NbN film on a Si substrate with a buffer MgO layer. J of communications technol & electronics. 2003;48(6):671–5.
Abstract: Measurements of the intermediate frequency band 900 GHz of mixers based on the electron heating effect (EHE) in 2-nm- and 3.5-nm-thick superconducting NbN films sputtered on MgO and Si substrates with buffer MgO layers are presented. A 2-nm-thick superconducting NbN film with a critical temperature of 9.2 K has been obtained for the first time using a buffer MgO layer.
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Amato MJ, Benford DJ, Moseley HS, Juan Roman. An engineering concept and enabling technologies for a large single aperture far-infrared observatory (SAFIR). In: Proc. SPIE. Vol 4850.; 2003. p. 1120–31.
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Stéphane Claude. Sideband-separating SIS mixer for ALMA band 7, 275–370 GHz. In: Proc. 14th Int. Symp. Space Terahertz Technol. Tucson, USA; 2003. 41.
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Grimes P, Kittara P, Yassin G, Withington S, Jacobs K. Investigation of the performance of a 700 GHz nline mixer. In: Proc. 14th Int. Symp. Space Terahertz Technol. Tucson, USA; 2003. 247.
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Albert Betz, Rita Boreiko, Yongdong Zhou, Jun Jhao, Yusuf Selamet, Yong Chang, et al. HgCdTe photoconductive mixers for 3-15 terahertz. In: Proc. 14th Int. Symp. Space Terahertz Technol. Tucson, USA; 2003. p. 102–11.
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Гольцман ГН, Лудков ДН. Сверхпроводниковые смесители на горячих электронах терагерцового диапазона и их применение в радиоастрономии. Изв. высших учебных заведений. Радиофизика. 2003;46(8/9).
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Tong C-YE, Meledin DV, Marrone DP, Paine SN, Gibson H, Blundell R. Near field vector beam measurements at 1 THz. IEEE Microw. Compon. Lett.. 2003;13(6):235–7.
Abstract: We have performed near-field vector beam measurements at 1.03 THz to characterize and align the receiver optics of a superconducting receiver. The signal source is a harmonic generator mounted on an X-Y translation stage. We model the measured two-dimensional complex beam pattern by a fundamental Gaussian mode, from which we derive the position of the beam center, the beam radius and the direction of propagation. By performing scans in the planes separated by 400 mm, we have confirmed that our beam pattern measurements are highly reliable.
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Aberle N, Witte U. Deep-sea macrofauna exposed to a simulated sedimentation event in the abyssal NE Atlantic: in situ pulse-chase experiments using 13C-labelled phytodetritus. Mar Ecol Prog Ser. 2003;251:37–47.
Abstract: Tracer experiments with 13C-labelled diatoms Thalassiosira rotula (Bacillariophycea, 98% 13C-labelled) were conducted at the Porcupine Abyssal Plain (PAP) in the NE Atlantic (BENGAL Station; 48<b0>50'N, 16<b0>30'W, 4850 m depth) during May/June 2000. In situ enrichment experiments were carried out using deep-sea benthic chamber landers: within the chambers a spring bloom was simulated and the fate of this food-pulse within the abyssal macrobenthic community was followed. In focus was the role of different macrofauna taxa and their vertical distribution within the sediment column in consuming and reworking the freshly deposited material. T. rotula is one of the most abundant pelagic diatoms in the NE Atlantic and therefore 0.2 g of freeze dried T. rotula, equivalent to 1 g algal C m-2 yr-1, was injected into each incubation chamber. Three different incubation times of 2.5, 8 and 23 d were chosen in order to follow the uptake of 13C-labelled phytodetritus by macrofauna. After only 2.5 d, 77% of all macrofauna organisms showed tracer uptake. After 23 d the highest degree of enrichment was measured and 95% of the individuals had taken up 13C from the introduced algal material. In addition to that a downward transport of organic matter was observed, even though the mixing was not very intense. The initial processing of carbon was dominated by polychaetes that made up a percentage of 52% of total macrofauna. In general macrofauna organisms that lived close to the sediment surface had higher access to the simulated food-pulse, confirming the hypothesis that individuals close to the sediment surface have the strongest impact on the decomposition of phytodetritus. In our study we observed only modest vertical entrainment of 13C tracers into the sediment. With regard to contradictory results from former 13C-enrichment experiments in bathyal regions, compared to results from our study site in the abyssal plain, we thus propose pronounced differences in feeding strategies between macrofauna communities from continental margins and abyssal plains.
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Kostiuk T. Heterodyne spectroscopy in the thermal infrared region: a window on physics and chemistry. In: University of Maryland Inn and Conference Center, editor. Proc. International Thermal Detectors Workshop (TDW'03), session 7 (Heterodyne detectors). 3501 University Boulevar East Adelphi, MD 20783; 2003.
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Snyder Hale DD. A thermal infrared heterodyne receiver with applications to astronomy. Berkeley, CA 94720; 2003.
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