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20. Comparative Study of Human Age Estimation Based on Hand-Crafted and Deep Face Features

Author

Belver, C., Arganda-Carreras, I., Dornaika, F., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Nasrollahi, Kamal, editor, Distante, Cosimo, editor, Hua, Gang, editor, Cavallaro, Andrea, editor, Moeslund, Thomas B., editor, Battiato, Sebastiano, editor, and Ji, Qiang, editor

Published
2017
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27. Novel isoreticular UiO-66-NH2 frameworks by N-cycloalkyl functionalization of the 2-aminoterephtalate linker with enhanced solar photocatalytic degradation of acetaminophen

Author

Gómez-Avilés, A., Solís, R.R., García-Frutos, Eva M., Bedia, J., Belver, C., Gómez-Avilés, A., Solís, R.R., García-Frutos, Eva M., Bedia, J., and Belver, C.

Abstract

This work reports for the first time the functionalization of the 2-aminoterephtalate linker of UiO-66-NH2 with cyclopentyl or cyclohexyl rings. The resulting materials displayed reduced bandgaps with enhanced separation of the photogenerated charges due to the inductive electron effect of the cycloalkyl substituent. These functionalized materials displayed higher photocatalytic performance towards the solar abatement of acetaminophen than UiO-66-NH2. The photocatalytic activation mechanism was proposed based on the band alignment and scavenger tests, suggesting the major contribution of holes and superoxide radicals. In particular, UiO-66-NH-C5 exhibited high stability under reaction with low activity loss after reusing. The acetaminophen degradation pathway was also studied indicating that the ACE molecules were coupled to dimers and trimers that were further oxidized. The small bandgap, the band structure, and the photocatalytic performance resulting from the cycloalkyl functionalization of UiO-66-NH2 make it a promising approach to designing novel photocatalysts for solar abatement of emerging contaminants. © 2023 The Author(s)

Published
2023

32. Evaluation of Information Systems: A Bibliography, 1967-1972.

Author

ERIC Clearinghouse on Library and Information Sciences, Washington, DC., Krevitt, Beth I., and Griffith, Belver C.

Abstract

The scope of this bibliography has been limited to literature dealing with the design, testing and evaluation of information storage and retrieval systems. A number of papers describing the implementation of specific systems were selectively included because they contained substantial or innovative material on evaluation; however, the bibliography generally emphasizes techniques applicable to a wide variety of systems. Similarly, articles dealing with specific products and services have been included when they showed broad implications for evaluation. On the other hand, discussions of specific library systems have been excluded as they were considered outside the scope of the bibliography. You will not, therefore, find such articles as those dealing with "objective tests of library performance." The last comprehensive bibliography in the field was compiled by Madeline Henderson and published in 1967. For that reason, the earliest citations in this compilation are for 1967. (Author/SJ)

Published
1973

33. Information Flow in the Language Sciences: An Exploratory Case Study of the Washington, D.C. Area. LINCS Project Document Series.

Author

Center for Applied Linguistics, Washington, DC. Language Information Network and Clearinghouse System., Levy, Mary M., and Griffith, Belver C.

Abstract

This report is a case study of communication in the language sciences in the Washington, D.C. metropolitan area. The areas of investigation were: (1) the professional characteristics of the people working in the language sciences, their major fields, academic background, and professional activities; (2) the types of information desired by language professionals, the sources consulted, the problems encountered in obtaining needed information, and the role of the various channels of information in the processing of information exchange; (3) the relationship among different areas in the language sciences in terms of the flow of information and overlap of subject-matter interests. The two principal components of the study were a questionnaire survey designed to obtain general data on the community of language professionals, and a series of interviews designed to explore the individual's use of information in his work setting. For the purposes of the study subjects were divided by major field into linguists, foreign language specialists, and professionals in other fields, and results revealed that respondents from these three different groups have different patterns of professional characteristics and activities. Much of the information obtained from the study is displayed in tabular form. The questionnaire form and the interview schedule are appended. (Author/FWB)

Published
1969

34. Materiales con propiedades tecnológicas obtenidos por modificación química de un caolín natural

Author

Belver, C., Bañares, M. A., and Vicente, M. A.

Subjects
Kaolin, acid treatment, alkaline treatment, Caolín, activación ácida, activación básica, Clay industries. Ceramics. Glass, TP785-869
Abstract

The synthesis of materials of high added value from a natural kaolin has been studied. The kaolin was pre-activated by means of calcination to obtain the metakaolins, which are amorphous solids capable of being modified by simple and non expensive chemical treatments. These solids were then submitted to acid and basic treatments to modify their structure and properties. The acid activation under specific conditions gave place to the synthesis of solids mainly constituted by silica with good textural properties, developing so much their external and internal surface, these solids may be used like adsorbentes and catalytic supports. On the other hand, the basic activation produced the modification of the metakaolins and it gave place to the crystallisation of the zeolite K-F (Z), appearing as a simple and effective method for the synthesis of this material.En este trabajo se ha estudiado la síntesis de materiales de alto valor añadido a partir de un caolín natural. Para ello el caolín fue pre-activado mediante calcinación para dar lugar a la formación de metacaolines, sólidos amorfos susceptibles de ser modificados por tratamientos químicos de una manera sencilla y poco costosa. Estos sólidos fueron posteriormente sometidos a tratamientos ácidos y básicos para modificar su estructura y propiedades. La activación ácida bajo unas condiciones específicas dio lugar a la síntesis de sólidos constituidos mayoritariamente por sílice con buenas propiedades superficiales, desarrollándose tanto su superficie externa como interna, revelándose como sólidos que pueden ser empleados como adsorbentes y soportes catalíticos. Por su parte, la modificación causada por la activación básica dio lugar a la cristalización de la zeolita K-F (Z), presentándose como un método sencillo y eficaz para la síntesis de este material.

Published
2004

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