1,039 research outputs found
Directorio de consultores, recursos y sitios de Internet relacionados con bibliotecas mexicanas = Directory of consultants, resources & Internet sites relating to Mexican libraries
No full textThis guidebook was compiled for: 1) foreign librarians, 2) Mexican students enrolled in programs of study in the field of librarianship or in certificate programs in library science, 3) volunteers or those in practicum service, 4) paraprofessionals or the recently degreed Mexican librarian, 5) non-experts. This work, a bilingual annotated directory, contains basic information on a wide range of resources relevant to librarianship as presently practiced in Mexico: books, articles, useful web pages, events, possible contacts in institutions. To find specific phrases or words use your navigator’s BUSCAR/FIND search tool, or scroll down. There is no intention to publish the list at this time. The information is being provided as a free service. This directory database is not exhaustive; the user is encouraged to verify all data from the source. Please provide us with your opinion concerning this Directory. All additions, suggestions, or modifications will be welcome. To contact the compiler, email: William Abrams Indexing Services, [email protected] . Your comments will help us to improve future editions. Terms of Use: This Directory is not copyrighted. It is a document in the public domain. No rights are reserved, either for the original or for derivative works. The file may be freely copied without prior permission, preferably using a CD-ROM data disc (but if access is from the website, one should first verify that the download has completed before copying). (Abstract taken verbatim from author's)
Increased efficiency of dye sensitized solar cells through the localization of light
No full textThe effects of tuning and scattering on the enhancement of conventional nanocrystalline TiO 2 dye sensitized solar cells were investigated when coupled to an inverse opal photonic crystal or disordered macroporous TiO 2 film. Multiple scattering events and localization between the nanocrystalline TiO 2 film and the coupled films have led to an increase in the molar absorption to the red edge of the stop band for the Ruthenium535 dye as compared to a standard Gratzel cell. This enhancement has shown an improvement ≤ 26percent over conventional DSSC. Both Bragg diffraction and diffuse scattering events were attributed to this efficiency enhancement. The effect of introducing scattering centers, tuning the bilayer structure, and novel cell designs were presented. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA, 8-22-26-2004)
Performance of a micro-engineered ultrasonic particle manipulator
No full textAn ultrasonic microfluidic particle manipulator has been modeled and its experimentally measured separation performance has been compared with the modeled results for 1 µm latex particles, and yeast particles in water
Religious and philosophical psychology in the works of N.M. Bogolyubov
No full textWe present the results of historical and psychological research filling the gaps of contemporary knowledge about personalities of religious and philosophical direction of Russian psychology in late XIX – early XX centuries. The author introduces the biography of events and the views of Russian psychologist N.M. Bogolyubov – a man of uneasy fate, embodied in his work the idea of spiritual practice in the analysis and description of a person's inner world. Psychological works of N.M. Bogolyubov reflect the views common for Russian spiritual direction in psychology: consideration of man's inner world by revealing how mental experience is given to the person, his self, recognition of the soul as a sphere of inner reality, recognition of the mental world of a person as an independent entity, living by its own laws, which do not depend on the laws of the material world, asserting that faith can be a valid knowledge. In the arsenal of creative achievements of N.M. Bogolyubov are determination of the value of psychology in studying the problem of religious consciousness and professionalism as a necessary quality of a researcher psychologist in the field
Increasing the conversion efficiency of dye-sensitized TiO 2 photoelectrochemical cells by coupling to photonic crystals
No full textThe mechanism of enhancing the light harvesting efficiency of dye-sensitized TiO 2 solar cells by coupling TiO 2 inverse opals or disordered scattering layers to conventional nanocrystalline TiO 2 films has been investigated. Monochromatic incident photon-to-current conversion efficiency (IPCE) at dye-sensitized TiO 2 inverse opals of varying stop band wavelengths and at disordered titania films was compared to the IPCE at bilayers of these structures coupled to nanocrystalline TiO 2 films and to the IPCE at nanocrystalline TiO 2 electrodes. The results showed that the bilayer architecture, rather than enhanced light harvesting within the inverse opal structures, is responsible for the bulk of the gain in IPCE. Several mechanisms of light interaction in these structures, including localization of heavy photons near the edges of a photonic gap, Bragg diffraction in the periodic lattice, and multiple scattering events at disordered regions in the photonic crystal or at disordered films, lead ultimately to enhanced backscattering. This largely accounts for the enhanced light conversion efficiency in the red spectral range (600-750 nm), where the sensitizer is a poor absorber. © 2005 American Chemical Society.Albada M. P. V., 1985, PHYS REV LETT, V55, P2692, DOI 10.1103-PhysRevLett.55.2692; ANDERSON PW, 1958, PHYS REV, V109, P1494; Barbe CJ, 1997, J AM CERAM SOC, V80, P3157; CARLSON RJ, 1984, APPL SPECTROSC, V38, P297, DOI 10.1366-0003702844555548; DOWLING JP, 1994, J APPL PHYS, V75, P1896, DOI 10.1063-1.356336; DOWLING JP, 1994, J MOD OPTIC, V41, P345, DOI 10.1080-09500349414550371; Ferber J, 1998, SOL ENERG MAT SOL C, V54, P265, DOI 10.1016-S0927-0248(98)00078-6; FLAUGH PL, 1984, APPL SPECTROSC, V38, P847, DOI 10.1366-0003702844554693; GARCIA N, 1991, PHYS REV LETT, V66, P1850, DOI 10.1103-PhysRevLett.66.1850; Huang SY, 1997, J PHYS CHEM B, V101, P2576, DOI 10.1021-jp962377q; Jiang P, 1999, CHEM MATER, V11, P2132, DOI 10.1021-cm990080+; JOHN S, 1984, PHYS REV LETT, V53, P2169, DOI 10.1103-PhysRevLett.53.2169; JOHN S, 1987, PHYS REV LETT, V58, P2486, DOI 10.1103-PhysRevLett.58.2486; Kalyanasundaram K., 1998, COORDINATION CHEM RE, V77, P347; Kang MG, 2003, SOL ENERG MAT SOL C, V75, P475, DOI 10.1016-S0927-0248(02)00202-7; Kishimoto H, 1998, J MATER CHEM, V8, P2019, DOI 10.1039-a801499j; Koenderink AF, 2000, PHYS LETT A, V268, P104; NAZEERUDDIN MK, 1993, J AM CHEM SOC, V115, P6382, DOI 10.1021-ja00067a063; Nishimura S, 2002, APPL PHYS LETT, V81, P4532, DOI 10.1063-1.1524693; Nishimura S, 2003, J AM CHEM SOC, V125, P6306, DOI 10.1021-ja034650p; OREGAN B, 1991, NATURE, V353, P737, DOI 10.1038-353737a0; Park NG, 2000, J PHYS CHEM B, V104, P8989, DOI 10.1021-jp994365l; Rothenberger G, 1999, SOL ENERG MAT SOL C, V58, P321, DOI 10.1016-S0927-0248(99)00015-X; SCALORA M, 1994, PHYS REV LETT, V73, P1368, DOI 10.1103-PhysRevLett.73.1368; Schlichthorl G, 1997, J PHYS CHEM B, V101, P8141, DOI 10.1021-jp9714126; Schuurmans FJP, 1999, PHYS REV LETT, V83, P2183, DOI 10.1103-PhysRevLett.83.2183; SOUKOULIS CM, 1989, PHYS REV LETT, V62, P575, DOI 10.1103-PhysRevLett.62.575; Stanley A., 1995, AUST J CHEM, V48, P1294; Stoytchev M, 1997, PHYS REV B, V55, pR8617; Tachibana Y, 2002, CHEM MATER, V14, P2527, DOI 10.1021-cm011563s; Tocci MD, 1996, PHYS REV A, V53, P2799, DOI 10.1103-PhysRevA.53.2799; Usami A, 1999, SOL ENERG MAT SOL C, V59, P163, DOI 10.1016-S0927-0248(99)00068-9; Usami A, 1997, CHEM PHYS LETT, V277, P105, DOI 10.1016-S0009-2614(97)00878-6; VANDERMARK MB, 1988, PHYS REV B, V37, P3575, DOI 10.1103-PhysRevB.37.3575; Vlasov YA, 1999, PHYS REV E, V60, P1030, DOI 10.1103-PhysRevE.60.1030; Wang W, 2001, J AM CHEM SOC, V123, P12528, DOI 10.1021-ja011262j; Wiersma DS, 1997, NATURE, V390, P671; WOLF PE, 1985, PHYS REV LETT, V55, P2696, DOI 10.1103-PhysRevLett.55.269618018718
An improved thick-film piezoelectric material by powder blending and enhanced processing parameters
No full textThis paper details improvements of the d33 coefficient for thick-film lead zirconate titanate (PZT) layers. In particular, the effect of blending ball and attritor milled powders has been investigated. Mathematical modeling of the film structure has produced initial experimental values for powder combination percentages. A range of paste formulations between 8:1 and 2:1 ball to attritor milled PZT powders by weight have been mixed into a screen-printable paste. Each paste contains 10% by weight of lead borosilicate glass and an appropriate quantity of solvent to formulate a screen printable thixotropic paste. A d33 of 63.5 pC/N was obtained with a combination of 4:1 ball milled to attritor milled powder by weight. The improved paste combines the high d33 values of ball and the consistency of attritor milled powder. The measured d33 coefficient was further improved to 131 pC/N by increasing the furnace firing pro-file to 100
Hades, N.M.
No full textCarlsbad Cavern. Artist: W. E. Mruk. Image printed on 11 x 15 inch, 100% rag, Arches (cold Press) watercolor paper, with large border. Block printed in Laughing Horse, # 11, Sept. 192
Spectral characterisation of shortened pulse position modulation format
No full textShortened pulse position modulation (SPPM) is a new modulation format that has recently been proposed for underwater wireless optical communications. A full spectral characterisation of SPPM is considered and original expressions are presented, which are validated numerically for predicting both the continuous and discrete spectrum
N.M. JADRINTSEV AND ALTAY: RESEARCH ACTIVITIES OF THE PUBLICIST AND HIS ROLE IN THE DEVELOPMENT OF ALTAI PERIODICALS
No full textPurpose. The purpose of this article is to study the role of Nikolai Mikhailovich Yadrintseva in the course of development of the Altai periodicals and its research and statistical activities in the Altai.
Methodology. When writing the article were used General scientific methods like analysis, comparison, generalization.
Results. As a result, the author analyzed the research, ethnographic and statistical activities of Nikolai Mikhailovich Yadrintsev in the Altai. Visiting with the research mission Altai, N.M. Yadrintsev published grandiose essays and articles not only about the ethnographic side of the Altaian “aliens”, but also was able to give his inhabitants a map of the locality and a detailed description of meteorological observations. The role of N.M. Yadrintsev in the development of the Altai periodicals and gives a general description of the newspaper “Eastern Review” under his leadership. Despite the fact that publications on behalf of N.M. Yadrintsev in the Altai were not preserved, with the exception of a small quatrain, he managed to raise the provincial periodicals to a completely new level. Together with Siberian correspondents, he was able to inspire a whole generation, as a result of which universities, museums and numerous Siberian publishing houses began to develop in the cities of Siberia. With the arrival of Nikolai Mikhailovich in the Altai, the periodical press noticeably developed and strengthened.
Practical implications. The article can be used in the teaching of local history, the history of Russia and Russian journalism
Spectral characterisation of nk pulse position modulation format
No full textnk pulse position modulation (PPM) is a new modulation format that has recently been proposed for the optical wireless channel. This Letter considers, for the first time, a full spectral characterisation of -PPM and presents original expressions, which are validated numerically, for predicting both the continuous and discrete spectrum
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