A review of tin oxide-based catalytic systems: Preparation, characterization and catalytic behavior

This paper reviews the important aspects of the preparation, characterization and catalytic behavior of tin oxide-based catalytic systems including doped tin oxide, mixed oxides which contain tin oxide, Pt supported on tin oxide and Pt/Sn supported on alumina. These systems have a broad range of applications and are continually increasing in importance. However, due to their complex nature, much remains to be understood concerning how they function catalytically

ISS and TPD study of the adsorption and interaction of CO and H2 on polycrystalline Pt

The adsorption and interaction of CO and H2 on polycrystalline Pt has been studied using ion scattering spectroscopy (ISS) and temperature programmed desorption (TPD). The ISS results indicate that the initial CO adsorption on Pt takes place very rapidly and saturates the Pt surface with coverage close to a monolayer. ISS also shows that the CO molecules adsorb at an angular orientation from the surface normal and perhaps parallel to the surface. A TPD spectrum obtained after coadsorbing C-12 O-16 and C-13 O-18 on Pt shows no isotopic mixing, which is indicative of molecular CO adsorption. TPD spectra obtained after coadsorbing H2 and CO on polycrystalline Pt provides evidence for the formation of a CO-H surface species

Proceedings

Conference held on Aug. 22-25, 1989, Centre of Urban Studies and Urban Planning, University of Hong Kong, Hong Kong.Sponsored by Hong Kong Institute of Planners and others.published_or_final_versionBoolean maps and the rationalization of opportunities and constraints in physical planning Brimicomble, Allan J. Brimicombe, Allan J. 13Computer aided landslip potential mapping and its application to land use planning and development control Siddle, H.J. Siddle, H.J. Turner, M.D. Turner, M.D. Bentley, S.P. Bentley, S.P. 1List of contributors 531Preface Yeh, Anthony G.O. Yeh, Anthony G.O. xiAuthor index viiGEOTECS - a simple computer mapping system for planning and resource inventory in Hong Kong Styles, K.A. Styles, K.A. Hansen, A. Hansen, A. 23Computer aided landuse transport environment analysis system Seetharam, K.E. Seetharam, K.E. Shibasaki, R. Shibasaki, R. Ishibashi, H. Ishibashi, H. 37Land-use and transport modelling in the Perth Metropolitan region: an integrated approach Neal, Bill Neal, Bill 49Developments in computer-aided teaching of land-use and transport planning techniques Black, J.A. Black, J.A. Ton, Tu T. Ton, Tu T. 51A computerized passenger information system for Melbourne's railway network Tong, C.O. Tong, C.O. 65Computer-based parking system for local authorities in Malaysia Wahab, Ibrahim Bin Wahab, Ibrahim Bin 77Computerized school bussing (CSB) system in Israel Mandel, Shmuel Mandel, Shmuel Finemesser, Ahura Finemesser, Ahura 89The application of GIS for urban land use planning and monitoring: a case study of low income housing development in Kuala Lumpur Yaakup, Ahirs B. Yaakup, Ahris B. Healey, Richard G. Healey, Richard G. Hughes, George C. Hughes, George C. 91Hypermedia-assisted creativity in identifying ways to shelter the homeless Dickey, John W. Dickey, John W. 93Computers, telecommunications and planning Newton, P.W. Newton, P.W. 105Integrating urban information systems and spatial models Brail, Richard K. Brail, Richard K. 107The study of microcomputer-based urban planning and management information system Cheng, Bingzhao Cheng, Bingzhao Song, Xiaodong Song, Xiaodong Lin, Changqin Lin, Changqin 119Urban planning processes and strategic information systems Worrall, L. Worrall, L. 123Computerized development feasibility models in urban policy development and density rights transfer negotiations Code, William R. Code, William R. 135Computers and statutory planning Falkiner, Timothy S. Falkiner, Timothy S. 143Planning appeals in the planning information base Lamb, Robert E. Lamb, Robert E. 145A methodology for efficiently structuring a set of activities Yim, Fun-kan, Claudia Yim, Fun-kan, Claudia Dickey, John W. Dickey, John W. 159Implementation of geographic information system technology (GIS) for use in urban planning and management Chambers, Donald D. Chambers, Donald D. 529Evaluating the impact of computers on urban planning activities Farthing, Stuart Farthing, Stuart 519The organizational and management implications of computer use in U.K. local authority planning departments Bardon, Keith S. Bardon, Keith S. 511Windows on order and chaos: the role of microcomputers in planning and management Cartwright, T.J. Cartwright, T.J. 491Emerging perspective on computer-aided planning Klosterman, Richard Klosterman, Richard 489A system dynamics model of urban land use TUDY: a computer aided education programme for urban planning at University of Tsukuba Kaji, Hideki Kaji, Hideki 469Computer graphics primer: the introduction of computer techniques in teaching planning graphics Melotte, Barrie Melotte, Barrie 467Using microcomputer-based imaging to evaluate urban design proposals Sherrill, Sam Sherrill, Sam 169Land information system in the programming and monitoring of new town development Yeh, Anthony Yeh, Anthony 171What is the next step? - training in information systems design Lindsay, John Lindsay, John 457Conditions for the effective utilisation of computers in urban planning in developing countries Masser, Ian Masser, Ian Campbell, Heather Campbell, Heather 439Use of computers in urban planning and management in Bangladesh Hossain, Hemayet Hossain, Hemayet 427SLIP: a microcomputer tool for accessibility- centrality analysis and planning in developing countries Kammeier, H. Detlef Kammeier, H. Detlef 425Applying an integrated expert system to urban management and planning Bouille, Francois Bouille, Francois 423Text animation or knowledge engineering?: two approaches to the design of urban planning expert systems Webster, Chris J. Webster, Chris J. Wislocki, Y. Wislocki, Y. Ho, C.S. Ho, C.S. 421A planner - modified expert system for strategic planning Wyatt, Ray Wyatt, Ray 419Integration of programming models and expert systems: an application to facility management and planning Han, Sang -yun Han, Sang-yun Kim, T. John Kim, T. John Adiguzel, Ilker Adiguzel, Ilker 391An expert system for forecasting roadside development Edamura, Toshiro Edamura, Toshiro Kawai, Takashi Kawai, Takashi 379Expert systems for urban and building planning and management Sharpe, Ron Sharpe, Ron Marksjo, Bertil Marksjo, Bertil Chen, Qian Chen, Qian 369GPM: geographical project monitoring Yapa, Lakshman S. Yapa, Lakshman S. Dilley, Maxx Dilley, Maxx 185Traffic planning by a 'Desktop expert' Taylor, Michael A.P. Taylor, Michael A.P. 353A decision support and expert system for retail planning Borgers, Aloys Borgers, Aloys Timmermans, Harry Timmermans, Harry 341A knowledge-based computer system for zoning Yan, Wanglin Yan, Wanglin Shimizu, Eihan Shimizu, Eihan 339The development of urban and regional information system in medium sized cities of China Cao, Guifa Cao, Guifa Hsu, Mei-ling Hsu, Mei-ling 333The application of the geotechnical data management system 'STRATA3' to urban planning Bentley, Stephen P. Bentley, Stephen P. Greenshaw, Lutaf Mark Greenshaw, Lutaf Mark Rice, Stephen M.M. Rice, Stephen M.M. 323Application of geographic information systems in an urban environment Lee, Yuk-cheung Lee, Yuk-cheung 321Value added of a geographical information system De Man, Eric W.H. De Man, Eric W.H. 315Building of micro-GIS tool and its application Wang, Zheng Wang, Zheng Ren, Fuhu Ren, Fuhu Cheng, Ji-cheng Cheng, Ji-cheng 299Planning agency experiences with automated mapping and geographic information systems French, Steven P. French, Steven P. Heffernon, Kelly M. Heffernon, Kelly M. Wiggins, Lyna L. Wiggins, Lyna L. 289The application of land information systems in planning in Western Australia Rogers, Mark B. Rogers, Mark B. 287A GKS-based microcomputer graphics package for urban and regional analysis and planning Wegener, Michael Wegener, Michael Spiekermann, Klaus Spiekermann, Klaus 205Brisbane city council digital mapping system: a major tool for urban planning and management in Brisbane Butler, John L.T. Butler, John L.T. 275Designing a digital urban topographic database for applications in urban planning and management Yeung, Albert K.W. Yeung, Albert K.W. 263How to use decomposing method of mixed pixel to renew the city's green area data bank using landsat-CCT data? Xu, Xiru Xu, Xiru Chen, Kai Chen, Kai 255Integrating remote sensing and geographic information system knowledge in an expert system for change detection Newkirk, Ross T. Newkirk, Ross T. Wang, Fangju Wang, Fangju 245Monitoring land use in the metropolitan region with remote sensing data Martin, Larry R.G. Martin, Larry R.G. Howarth, Philip J. Howarth, Philip J. Gong, Peng Gong, Peng Holder, Glenn H. Holder, Glenn H. 233Applications of micro computer based spatial analysis for urban and regional planning Simmons, Michael Simmons, Michael 231Using a microcomputer to explore relationships in information: utilising graphical and spreadsheet techniques Banister, Chris Banister, Chris 219Designing advanced spreadsheet templates for novice microcomputer users Bossard, Earl G. Bossard, Earl G. 20

Platinized tin oxide catalysts for CO2 lasers: Effects of pretreatment

Platinized tin oxide surfaces used for low-temperature CO oxidation in CO2 lasers have been characterized before and after reduction in CO at 125 and 250 C using ion scattering spectroscopy (ISS) and X ray photoelectron spectroscopy (XPS). XPS indicates that the Pt is present initially as PtO2. Reduction at 125 C converts the PtO2 to Pt(OH)2 while reduction at 250 C converts the PtO2 to metallic Pt. ISS shows that the Pt in the outermost atomic layer of the catalyst is mostly covered by substrate species during the 250 C reduction. Both the ISS and XPS results are consistent with Pt/Sn alloy formation. The surface dehydration and migration of substrate species over surface Pt and Sn appear to explain why a CO pretreatment at 250 C produces inferior CO oxidation activities compared to a 125 C pretreatment

Electron stimulated desorption of atomic oxygen from silver

The electron stimulated desorption (ESD) of neutral oxygen atoms from polycrystalline silver and of oxygen ions from Ag(110) has been studied. Polycrystalline Ag charged with (16)O2 and (18)O2 and bombarded by low-energy electrons (approx 100 eV) under ultrahigh vacuum (UHV) conditions emitted O atom flux levels of 1 x 10 to the 12th power/sq cm/s at a Ag temperature of 300 C. The flux was detected with a quadrupole mass spectrometer operating in the appearance potential mode. The neutral cross section at about 100 C was determined to be 7 x 10 to the -19 sq cm. Ancillary experiments conducted in a UHV chamber equipped with a cylindrical mirror analyzer and rigged for ion energy distribution and ion angular distribution were used to study O ions desorbed from Ag(110). Two primary O(+) energies of 2.4 and 5.4 eV were detected from the Ag(110) after having been dosed with 2500 L of (16)O2. It also appears that in both experiments there was strong evidence for directionality of the emitted flux. The results of this study serve as a proof of concept for the development of a laboratory atomic oxygen beam generator that simulates the gas flux environment experienced by orbiting vehicles

Characterization study of polycrystalline tin oxide surfaces before and after reduction in CO

Polycrystalline tin oxide surfaces have been examined before and after reduction in 40 Torr of CO at 100 and 175 C using Auger electron spectroscopy (AES), electron spectroscopy for chemical analysis (ESCA), ion scattering spectroscopy (ISS) and electron stimulated desorption (ESD). The changes in the surface composition and chemical states of the surface species generally are subtle for the reductive conditions used. However, significant changes do occur with regard to the amounts and the chemical forms of the hydrogen-containing species remaining after both the 100 and 175 C reductions

Building a competitive Pearl River Delta region: cooperation, coordination, and planning

Includes bibliographical references.Papers mainly originated from the Seminar on Building a Competitive Pearl River Delta Region: Cooperation, Coordination and planning held on 8 July 2000 at the Hong Kong Convention and Exhibition Centrepublished_or_final_versionTransport10 Competition, cooperation and government of airports in the greater Pearl River Delta region James Wang and Cherry Ho Wang, James Ho, Cherry 1079 Issues on the development and cooperation of Marine technology in the Pearl River Delta region Zhou Houcheng, Li Ping, Zhang Bixiong and Yu Xijun Zhou, Houcheng Li, Ping Zhang, Bixiong Yu, Xijun 998 From cross-border manufacturing operations to regional economic integration: evolution of Hong Kong's economy and the Guangdong factor Chyau Tuan and Linda 817 Trade and commerce in the Pearl River Delta Region C.C. Tung Tung, C.C. 756 Regionalization of the World economy and economic cooperation in the Pearl River Delta Region Chen Guanghan Chen, Guanghan 65Conclusion2 Hong Kong and the Pearl River Region - competing together Victor Fung Fung, Victor 27Urban and regional planning14 Fighting air pollution in Hong Kong Thomas Chow Chow, Thomas 15313 An overview of environmental protection in Guangdong province Chen Min Chen, Min 14512 A study on an integrated cross-border transport network for the Pearl River Delta Xu Xueqiang and Xu Yongjian Xu, Xueqiang Xu, Yongjian 12715 Photochemical Smog: An air-pollution problem requiring regional solutions Wang Tao Wang, Tao 1595 Further strengthening economic cooperation between Guangdong and Hong Kong : the promotion of an export- oriented economy in the Pearl River Delta Region Yang Qifan Yang, Qifan 5916 Air pollution considerations in town planning in Hong Kong Johnny C.L. Chan, Andrew Y.S. Cheng, Liu Heping and Andrew Walton Chan, Johnny C.L. Cheng, Andrew Y.S. Liu, Heping Walton, Andrew 16517 Sustainable development in the Pearl River Delta region: assumptions and parameters for public policy Christine LOH LOH, Christine 18311 Port planning for the Pearl River Delta region: a Hong Kong perspective Alex Fong Fong, Alex 12118 Thoughts on the environment and sustainable development for the Pearl River Delta region Kim A. Salkeld Salkeld, Kim A. 189List of figures viiList of boxes, tables and appendices xi19 Guangdong - Hong Kong environmental cooperation: problem, solution and urgency Ma Xiaoling Ma, Xiaoling 193List of contributors xiii20 Towards effective regional environmental governance for the Hong Kong - Pearl River Delta border zong: the relevance of some international experiences Yok-shiu F. Lee Lee, Yok-shiu F. 20521 Towards a shared prosperity through cross-border cooperation Sun Huasheng Sun, Huasheng 23722 A study on developing the Hong Kong - Shenzhen border zone Shiu Sin-por and Yang Chun Shiu, Sin-por Yang, Chun 24523 Cross-boundary planning: the interface between Hong Kong and the Mainland Ava Ng Ng, Ava 27124 The Pearl River Delta region: our economic space, our life space Mee-kam Ng Ng, Mee-kam 283Foreword Zhou Ganzhi 1Environment25 The Pearl River Delta region: future scenarios Tunney Lee, Ralph Gakenheimer, Nien Dak Sze and Ming Zhang Lee, Tunney Gakenheimer, Ralph Sze, Nien-dak Zhang, Ming 30126 Further cooperation between Hong Kong and the Pearl River Delta in creating a more competitive region Anthony Gar-on Yeh Yeh, Anthony Gar-on 319Preface 5Introduction3 Modernization of the Pearl River Delta Region and the stability and prosperity of Hong Kong Dong Hong Dong, Hong 33Economic development27 Building a competitive Pearl River Delta Region: future prospects Alex Chan Chan, Alex 3474 Managing the Hong Kong-Guangdong relationship: issues and challenges Peter T.Y. Cheung Cheung, T.Y. Peter 391 The Pearl River Delta: an evolving region Thomas J. Campanella, Ming Zhang, Tunney Lee and Nien Dak Sze Campanella, Thomas J. Zhang, Ming Lee, Tunney Sze, Nien-dak

Efficient tree-listing algorithm

Electronics LettersThe article of record may be found at http://dx.doi.org/10.1049/el:19700192An algorithm, based on the T-triangle method, is given for the generation of all the trees in a nonoriented connected graph. The efficiency of the algorithm is verified by computer results