نتایج جستجو برای: gap chromic film

تعداد نتایج: 230399  

Journal: :Optics express 2014
Junshan Lin Sang-Hyun Oh Hoai-Minh Nguyen Fernando Reitich

This paper investigates the millimeter electromagnetic waves passing through a metal nanogap. Based upon the study of a perfect electrical conductor model, we show that the electric field enhancement inside the gap saturates as the gap size approaches zero, and the ultimate enhancement strength is inversely proportional to the thickness of the metal film. In addition, no significant enhancement...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1392

این تحقیق به منظور یافتن تاثیر دو نوع task به نام های information gap و opinion gap بر روی نوشتار زبان آموزان برون گرا بوده است. به این منظور گروهی از 110 دانش آموز دبیرستانی به پرسشنامه آیزنک پاسخ دادند که از بین آنها 91 دانش آموز برون گرا انتخاب شد. این 91 نفر قبل از شروع کار برای همگون سازی در آزمون پت شرکت کردند. در نهایت دو گروه که یک گروه شامل 32 دانش آموز با opinion gap taskو یک گروه 30 ...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم انسانی 1390

this study investigated the effects of manipulating the cognitive complexity of tasks along +/- few elements and the time limits on l2 learners writing performance. to conduct the study, 60 iranian efl learners with two levels of proficiency, low and high intermediate, were selected and assigned to three groups based on the time devoted to task completion. the participants performed both a simp...

Cu2ZnSnS4 (CZTS) thin films were prepared by directly sputteringCu (In,Ga)Se2 quaternary target consisting of (Cu: 25%, Zn: 12.5%, Sn; 12.5%and S: 50%). The composition and structure of CZTS layers have beeninvestigated after annealing at 200 0C, 350 0C and 500 0C under vacuum. Theresults show that recrystallization of the CZTS thin film occurs and increasingthe grain size with a preferred orie...

Journal: :Gut 1979
F G Simpson G P Hall J Kelleher M S Losowsky

Thirty-seven patients undergoing routine investigation for malabsorption were given radio-opaque pellets (ROP) which were compared with polyethylene glycol and chromic oxide as continuous faecal markers. Percentage recovery of all markers showed a wide range. The recovery of all markers was very similar, and radio-opaque pellet-corrected daily faecal fat correlated very closely with PEG-and chr...

Journal: :Chemical communications 2003
Yqing Wang Belma Erdogan James N Wilson Uwe H F Bunz

The synthesis of a poly(paraphenyleneethynylene) with macromolecular side chains and its irreversible thermo-chromic behaviour are reported herein.

Nanocrystalline cadmium sulfide thin films as antireflection materials for solar cells have been prepared by a new chemical solution deposition route in an aqueous medium at 50 °C. as-deposited thin films were studied using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and optical absorption spectra. X-ray diffraction data indicated the formation of hexagonal na...

2010
Mehmet Akgul Bongsang Kim Zeying Ren

Capacitively transduced micromechanical disk resonators that exhibit simultaneous low motional resistance (< 130 Ω) and high Q (>70,000) at 61 MHz are demonstrated using an improved ALDpartial electrode-to-resonator gap filling technique that reduces the Q-limiting surface losses of previous renditions by adding an alumina pre-coating before ALD of the gap-filling high-k dielectric. This work i...

Journal: :The British journal of radiology 1997
M Stasi V Casanova Borca C Fiorino

An important step in the verification of the reliability of portal films as in vivo dosemeters is the evaluation of the agreement between exit dose profiles and optical density profiles measured on the portal film. To test the possibilities of a conventional portal film system in 60Co beams suitable for head and neck irradiation, we verified the agreement between relative exit doses (measured b...

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