نتایج جستجو برای: kbr

تعداد نتایج: 750  

Journal: :Russia and the moslem world 2021

The Kabardino-Balkarian Republic (KBR) has civil society institutions that have become active actors in public life. COVID-19 pandemic caused a significant change the way of holding annual history and culture related festivities mourning ceremonies, which were taking place online via social networks.

2017
Tatyana L. Rakitskaya Tatyana A. Kiose Kristina O. Golubchik Alim A. Ennan Vitalia Y. Volkova

Samples of natural clinoptilolite were modified by an acid-thermal method at nitric acid concentrations of 0.25, 0.5, 1.0, and 3.0 M and a contact time of 30 min. A series of catalysts, K2PdCl4-Cu(NO3)2-KBr/S (S = 0.25H-CLI, 0.5H-CLI, 1H-CLI, and 3H-CLI) was obtained. All samples were investigated by X-ray phase and thermogravimetric analysis, FT-IR spectroscopy, water vapor ad/desorption and p...

Journal: :Inf. Sci. 2012
Mustansar Ali Ghazanfar Adam Prügel-Bennett Sándor Szedmák

Recommender systems apply machine learning techniques for filtering unseen information and can predict whether a user would like a given item. In this paper, we propose kernel based recommender (KBR) algorithms that solve the recommender system problem based on a novel structure learning technique. This paper makes contribution on the followings: we show how (1) user-based and item-based versio...

2004
Jobin Cyriac T. Pradeep

We have investigated the effect of ice substrate on the temperature dependent structural changes of formic acid. Infrared spectra of HCOOH@KBr, HCOOH@H2Oamorphous and HCOOH@H2Ocrystalline were measured in the temperature range of 18–180 K (X@Y represents X deposited on Y). At 18 K formic acid deposited over ice exists principally as its dimer. Upon increase of temperature, the dimer gets conver...

1999
Juan I. Larruquert José A. Méndez José A. Aznárez Anton S. Tremsin Oswald H.W. Siegmund

The optical constants of thin films of CsI, KI, and KBr in the spectral range of 53.6-174.4 nm were obtained from the measurements of reflectivity as a function of the incidence angle. The effect of film heating to 420 K and exposure to UV radiation on the optical constants of the three materials was also investigated. The quantum efficiencies (QEs) of the planar photocathodes made with the thr...

2011
Thilo Glatzel Lars Zimmerli Shigeki Kawai Ernst Meyer Leslie-Anne Fendt Francois Diederich

The growth of molecular assemblies at room temperature on insulating surfaces is one of the main goals in the field of molecular electronics. Recently, the directed growth of porphyrin-based molecular wires on KBr(001) was presented. The molecule-surface interaction associated with a strong dipole moment of the molecules was sufficient to bind them to the surface; while a stabilization of the m...

2004
Andresa Carla Obici Mário Alexandre Coelho Sinhoreti Elisabete Frollini Lourenço Correr Sobrinho Simonides Consani

The purpose of this study was to evaluate the degree of conversion (DC) of the Z250 composite, using six photo-activation methods, two storage periods and two preparation techniques of the FTIR specimens (n = 3). For the KBr pellet technique, the composite was placed into a metallic mold and photo-activated as follows: continuous light, exponential light, intermittent light, stepped light, PAC ...

2016
S. Bangaru

The comparison of Optical absorption, Photoluminescence (PL), Thermoluminescence (TL) and other optical studies of X-ray irradiated Ce 3+ doped KBr and KI single crystals were discussed. Photoluminescence of these crystals exhibits characteristic Ce 3+ emission due to 5d-4f transition in both the studied material in addition to the host emission. Optical absorption and PL studies confirm the pr...

2017
Faming Gao

We demonstrate that a hardening rule exists in cubic solid solutions with various combinations of ionic, covalent and metallic bonding. It is revealed that the hardening stress ∆τFcg is determined by three factors: shear modulus G, the volume fraction of solute atoms fv, and the size misfit degree δb. A simple hardening correlation in KCl-KBr solid-solution is proposed as ∆τFcg = 0.27 G. It is ...

Journal: :Journal of Physics: Conference Series 2009

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