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2003

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Articles 1351 - 1380 of 3876

Full-Text Articles in Physical Sciences and Mathematics

Two-Active Electron Approach To Multi-Electron Systems In Intense Ultrashort Laser Pulses: Application To Li–, G. Lagmago Kamta, Anthony F. Starace May 2003

Two-Active Electron Approach To Multi-Electron Systems In Intense Ultrashort Laser Pulses: Application To Li–, G. Lagmago Kamta, Anthony F. Starace

Anthony F. Starace Publications

The interaction of Li– with an ultrashort intense laser pulse is investigated by solving the time-dependent Schrödinger equation (TDSE) in the dipole approximation using a two-active electron approach. We describe the numerical solution of the TDSE and give a more detailed presentation of a technique for obtaining angular distributions for double ionization by intense ultrashort laser pulses. We show how selection rules observed in the angular distributions for double ionization by an intense laser field can be derived from the symmetry properties of the wave function. In an attempt to elucidate the mechanisms for double ionization in the multiphoton …

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The Babar Mini, Duncan Brown May 2003

The Babar Mini, Duncan Brown

Physics - All Scholarship

BaBar has recently deployed a new event data format referred to as the Mini. The Mini uses efficient packing and aggressive noise suppression to represent the average reconstructed BaBar event in under 7 KBytes. The Mini packs detector information into simple transient data objects, which are then aggregated into roughly 10 composite persistent objects per event. The Mini currently uses Objectivity persistence, and it is being ported to use Root persistence. The Mini contains enough information to support detailed detector studies, while remaining small and fast enough to be used directly in physics analysis. Mini output is customizable, allowing users …

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Introduction (2003), Association Of Christians In The Mathematical Sciences May 2003

Introduction (2003), Association Of Christians In The Mathematical Sciences

ACMS Conference Proceedings 2003

Fourteenth Conference of the Association of Christians in the Mathematical Sciences

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Discovery, Visualization And Analysis Of Gene Regulatory Sequence Elements In Genomes, Daniel F. Simola May 2003

Discovery, Visualization And Analysis Of Gene Regulatory Sequence Elements In Genomes, Daniel F. Simola

Dartmouth College Undergraduate Theses

The advent of rapid DNA sequencing has produced an explosion in the amount of available sequence information, permitting us to ask many new questions about DNA. There is a pressing need to design algorithms that can provide answers to questions related to the control of gene expression, and thus to the structure, function, and behavior of organisms. Such algorithms must filter through massive amounts of informational noise to identify meaningful conserved regulatory DNA sequence elements. We are approaching these questions with the notion that visualization is a key to exploring data relationships. Understanding the exact nature of these relationships can …

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A Progressive Folding Algorithm For Rna Secondary Structure Prediction, Samuel J. Stearns May 2003

A Progressive Folding Algorithm For Rna Secondary Structure Prediction, Samuel J. Stearns

Dartmouth College Master’s Theses

RNA secondary structure prediction is an area where computational techniques have shown great promise. Most RNA secondary structure prediction algorithms use dynamic programming to compute a secondary structure with minimum free energy. Energy minimization algorithms are less accurate on larger RNA molecules. One potential reason is that larger RNA molecules do not fold instantaneously. Instead, several studies show that RNA molecules fold progressively during transcription. This process could encourage the molecule to fold into a structure that is not at the global lowest energy level. Additionally, dynamic programming algorithms do not allow for a important type of structure called a …

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Aspects Of Financial Dualism In Less Developed Country., Rajalaxmi Mallik Dr. May 2003

Aspects Of Financial Dualism In Less Developed Country., Rajalaxmi Mallik Dr.

Doctoral Theses

One significant aspect of the economic dualism that characterises less developed countries (LDCS) is financial dualism. This is manifested through the co-existence of formal-lenders (FLs) and informal-lenders (ILs), in the credit markets of LDCS, which stands in stark contrast to the integrated, organised and efficiently functioning credit markets of the developed countries. FLs refer to the large institutional lenders, like commercial banks and other government owned banks that are subject to various central bank regulations. The ILs on the other hand are a heterogeneous lot and consist of non-institutional lenders like indigenous bankers, moneylenders, traders, landlords etc., who are outside …

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Schedule (2003), Association Of Christians In The Mathematical Sciences May 2003

Schedule (2003), Association Of Christians In The Mathematical Sciences

ACMS Conference Proceedings 2003

Fourteenth Conference of the Association of Christians in the Mathematical Sciences

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Table Of Contents (2003), Association Of Christians In The Mathematical Sciences May 2003

Table Of Contents (2003), Association Of Christians In The Mathematical Sciences

ACMS Conference Proceedings 2003

Fourteenth Conference of the Association of Christians in the Mathematical Sciences

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Selective Corrosion In Duplex Stainless Steel, Wen-Ta Tsai, Kuen-Ming Tsai, Chang-Jian Lin, Yan Fu May 2003

Selective Corrosion In Duplex Stainless Steel, Wen-Ta Tsai, Kuen-Ming Tsai, Chang-Jian Lin, Yan Fu

Journal of Electrochemistry

In duplex stainless steel, the two constituent phases, namely ferritic (α)and austenitic(γ) phases, have different crystal structure and chemical composition. They may thus exhibit different corrosion resistances in aqueous environment. In this investigation, an electrochemical technique with spatial resolution was employed to measure the potential difference between these two constituent phases in 2205 duplex stainless steel. Image analyzing techniques were also used to examine the preferential corrosion between α and γ phases. The experimental results showed that ferrite had a higher potential than austenite in0.01 mol/L NaCl solution. In 2 mol/L H2SO4+x mol/L HCl solution, two distinct peaks appeared in …

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A Bilayer Self-Assembled Membrane Electrode For Fluorescence And Its Electrochemical Characterization, Xiang-Ying Sun, Bin Liu, Yun-Bao Jiang May 2003

A Bilayer Self-Assembled Membrane Electrode For Fluorescence And Its Electrochemical Characterization, Xiang-Ying Sun, Bin Liu, Yun-Bao Jiang

Journal of Electrochemistry

The bilayer membrane was assemblied on Au electrode by the electrostatic interaction between the fluorescence regent 1_naphthylamine diacetate acid(NADA) and DL_Cysteine. The SAMs electrode NADA/Cys/Au can be used as fluorescence and electrochemical sensor for metal ions. This paper states the electrochemical characterization of NADA/Cys/Au and SAMs' application in continous determination for Cu2+ and Ni2+.

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Corrosion Behavior Of Mg_(1.85)Mm_(0.15)Ni Hydrogen Storage Alloy Modified By Electroless Cu In Ch_3oh·H_2o Solutions, Hua-Bin Yang, Hai-Chang Zhang, Hua Sun, Xiao-Dan Wang, Zuo-Xiang Zhou May 2003

Corrosion Behavior Of Mg_(1.85)Mm_(0.15)Ni Hydrogen Storage Alloy Modified By Electroless Cu In Ch_3oh·H_2o Solutions, Hua-Bin Yang, Hai-Chang Zhang, Hua Sun, Xiao-Dan Wang, Zuo-Xiang Zhou

Journal of Electrochemistry

The corrosion behavior of the Mg1.85Mm0.15Ni (Mm:Ce_rich mischmetal) alloy modified by electroless Cu coating in different CH3OH_H2O solutions has been investigated by potentiodynamic polarization and electrochemical impedance spectroscopy. These results showed that the corrosion behavior was improved after electroless Cu. The potentiodynamic polarization and electrochemical impedance spectroscopy results showed that the alloy electrode had more promising anti_corrosion behavior after coated in a 40%CH3OH_H2O solution. The values of corrosion current density and electrode reaction resistance were 5.6 mA·cm-2(11.7 mA·cm-2 for uncoated alloy electrode) and 22.25 Ω·cm2 (1.99 Ω·cm2 for the uncoated alloy electrode), respectively.

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Oxidation Behavior Of Zr-Cu-Al-Ni Amorphous Alloys In Air At 300～500 ℃, H. Hsieh H., Kai W., G. Neih T., Kawamura Y. May 2003

Oxidation Behavior Of Zr-Cu-Al-Ni Amorphous Alloys In Air At 300～500 ℃, H. Hsieh H., Kai W., G. Neih T., Kawamura Y.

Journal of Electrochemistry

The oxidation behavior of the Zr_based bulk amorphous alloy (BMG; Zr_30Cu_10Al_5Ni in at.%) was studied in dry air over the temperature range 300～500 ℃. The kinetic results indicated that the amorphous alloy oxidized linearly at 300 ℃,while the parabolic oxidation was observed at 350～425 ℃, and the oxidation behavior at 500 ℃ was irregular and complicated. In general, the scales formed on the surface of the amorphous alloy were temperature_dependent, consisting of tetragonal_ZrO2 at 300　℃, and of mostly tetragonal_ZrO2 as well as minor amounts of monoclinic_ZrO2 and CuO at T≥350　℃.

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Study Of Marine Biocorrosion Using Afm And Molecular Techniques, Herbert H.P.Fang, Lichong Xu, Tong Zhang May 2003

Study Of Marine Biocorrosion Using Afm And Molecular Techniques, Herbert H.P.Fang, Lichong Xu, Tong Zhang

Journal of Electrochemistry

Biofilm is ubiquitous in nature.However,corrosin caused by biofilm is still by and large overlooked.This presentation is to demonstrate the applications of several newly developed analytical techniques in chemisrty and microbiology for the study of marine biocorrosion on steel.AFM(atomic force microscopy) was applied to investigate the initial formation mechanism of biofilm and the degree of corrosion of steel in polluted seawater.DNA/RNA_related molecular techniques were used to analyze the microbial composition corrosive biofilm. Results showed that microbial corrosion began within six days, and the corroded volume in the increased as a power function of time with an index 2.83. Most of the …

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Electrochemical Monitoring On The Deactivation Of A Metallic Oxide Anode, Li-Kun Xu, Shi-Zhe Song, Ting-Yong Wang, Guang-Zhang Chen May 2003

Electrochemical Monitoring On The Deactivation Of A Metallic Oxide Anode, Li-Kun Xu, Shi-Zhe Song, Ting-Yong Wang, Guang-Zhang Chen

Journal of Electrochemistry

The process of accelerated life test of an IrO2/Ta2O5 coated titanium anode was monitored using cyclic voltammetry and electrochemical impedance spectroscopy.The vatiation with electrolysis time of anodic voltammetric charge Q*,the double layer capacitance Cdl,the oxide film resistance Rf and the charge transfer resistance Rct for oxygen evolution was measured.A deactivation mechanism was proposed based on the observation results.

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Corrosion Behavior Of Reinforcing Steel In Concrete Subjected To Chloride Contamination By Eis, Rong-Gang Hu, Rong-Gui Du, Chang-Jian Lin May 2003

Corrosion Behavior Of Reinforcing Steel In Concrete Subjected To Chloride Contamination By Eis, Rong-Gang Hu, Rong-Gui Du, Chang-Jian Lin

Journal of Electrochemistry

Electrochemical impedance spectroscopy(EIS) was employed to study the influence of chloride on the corrosion behavior of reinforcing steel in concrete.In Nyquist plot,the spectrum consists of two semicircles,indicating that the reinforced concrete system contained two time constants,one derived from electrical double layer of reinforcing steel and the other from the deposition film of concrete layer.The depressed semicircle in lower frequency featured the non_faradic behavior of the electrical double layer (EDL) deviated from idea capacitor due to diffusive effect which was attributed to the surface roughness of rebar and the inhomogenity of concrete layer.Then the EDL was denoted by a constant phase …

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Synthesis And Electrochemical Characteristics Of Nickel-Based Complex Oxide Li_Ani_(0.78)Co_(0.2)Cd_(0.02)O_2, Rong-Zhong Yuan, Mei-Zhen Qu, Zuo-Long Yu May 2003

Synthesis And Electrochemical Characteristics Of Nickel-Based Complex Oxide Li_Ani_(0.78)Co_(0.2)Cd_(0.02)O_2, Rong-Zhong Yuan, Mei-Zhen Qu, Zuo-Long Yu

Journal of Electrochemistry

The nickel_based complex oxide LiaNi0.78Co0.02O2 cathode materials for lithium_ion rechargeable batteries was synthesized by the improved solid_state reaction method with LiOH·H2O, ball_like Cd_doped Ni(OH)2 and Co2O3 as raw materials. The analysis ICP_AES proved that the as_prepared compounds were near the stoichiometric form. The XRD, SEM and electrochemical characteristics testing were also carried out. The results showed that the complex cathode material LiaNi0.78Co0.2Cd0.02O2 has layered structure, homogeneous surface distributions,uniform particles with good crystal morphology as well as stable electrochemical performances. At ambient temperature the resulted materials have a high reversible capacity and good cycling stability.Its highest initial reversible capacity is more …

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Effect Of Scn~- On The Transition Current Of Zn During The Electrodeposition Zn-Co Alloys, Ren-He Yin, Wei-Min Cao, Zheng-Hua Fang May 2003

Effect Of Scn~- On The Transition Current Of Zn During The Electrodeposition Zn-Co Alloys, Ren-He Yin, Wei-Min Cao, Zheng-Hua Fang

Journal of Electrochemistry

For co_deposition of Zn_Co alloys at sufphate baths with micro_concentration of SCN- the transition current of Zn was found with the deposition process changing from normal Co_deposition to anomalous co_deposition, and the value of transition current increased with increasing SCN- concentration, but decreased with increasing value of pH. The existence of SCN- decreases the evolution overpotential of Co metal, but has no effects on the evolution overpotential of Zn metal and H2.

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Recent Progress In The Research On Electrodeposition Of Composite Coatings, Xiao-Bing Liu, Xu-Cheng Wang, Yu Chen, Dan-Hong Cheng, Zu-Zhan Yu May 2003

Recent Progress In The Research On Electrodeposition Of Composite Coatings, Xiao-Bing Liu, Xu-Cheng Wang, Yu Chen, Dan-Hong Cheng, Zu-Zhan Yu

Journal of Electrochemistry

Recent progress in the research on composite coatings prepared by electroplating technology is reviewed. The nanoscaled particles, electrocatalytic, photoactive composite coatings are emphatically discussed. The composite coatings prepared by dispersing nanoscaled particles could attain better hardness, wear resistance and corrosion resistance than those of composite coatings which prepared by adding micronscaled particles. As compared with pure metal electrode and alloy electrode, some electrocatalytic composite coatings electrode could markedly reduce the overvoltages of cathodic and anodic electrode reaction. In recent years, the electrocatalytic composite coatings which based on metal oxides and conductive polymer as matrix materials become a newest field of …

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Initial Stages Of Pd Deposition Onto Au(111) Electrodes From Pdso_4 Solution, Jing Tang, Petri M., Kibler L.A., Kolb D.M. May 2003

Initial Stages Of Pd Deposition Onto Au(111) Electrodes From Pdso_4 Solution, Jing Tang, Petri M., Kibler L.A., Kolb D.M.

Journal of Electrochemistry

Metal thin films have attracted considerable interest in relation to catalysis, energy, material, corrosion and environmental protection. Pd thin film is capable of proton reduction and strong hydrogen absorption, which has shown electrocatalytic activity to the oxidation of small organic molecules. In this paper, in_situ STM measurements are performed to study the deposition process and the influence of the surface structure and anion adsorption. When Pd is deposited from PdSO4 solution on Au(111) in the UPD range, a monolayer of Pd with pseudomorphic (1×1) structure was formed on the substrate with induced (3×7) R19° SO2-4 adsorption. With decreasing potential the …

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Preparation And Electrochemical Preformance Of Zn-La Alloys, Xian-Ling Meng, Hua-Bin Yang, En-Dong Yang, Xiao-Dan Wang, Hai-Chang Zhang, Jun-Hong Wang, Zuo-Xiang Zhou May 2003

Preparation And Electrochemical Preformance Of Zn-La Alloys, Xian-Ling Meng, Hua-Bin Yang, En-Dong Yang, Xiao-Dan Wang, Hai-Chang Zhang, Jun-Hong Wang, Zuo-Xiang Zhou

Journal of Electrochemistry

Zn_La alloys were prepared by solid phase diffusion method and the effects of La on the electrochemical performance of zinc electrodes were investigated using potentiostatic polarization technique and charging/discharging cycle test. The results showed that adding La to zinc electrode remarkably suppressed the zinc dendrite, the shape of zinc electrode and zinc corrosion, and hence, markedly improved the cycle performance of zinc electrodes. The discharging capacity of the zinc electrode containing 0.5at.% La which was the optimum was still 520 mAh/g after it cycled 80s at the current of 100 mA. The XPS showed that La element mainly adhered on …

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Microstructure And Electrochemical Characteristics Of The Anodic Film Formed On Aluminum Surface, Jeng-Kuei Chang, Chi-Min Liao, Chih-Hsiung Chen, Wen-Ta Tsai May 2003

Microstructure And Electrochemical Characteristics Of The Anodic Film Formed On Aluminum Surface, Jeng-Kuei Chang, Chi-Min Liao, Chih-Hsiung Chen, Wen-Ta Tsai

Journal of Electrochemistry

The thickness, morphology, chemical composition, and crystallinity of the anodized film formed on aluminum were examined in a transmission electron microscope (TEM). Thin foil for TEM analysis was prepared by ultramicrotomy. The relationship between the microstructure and the electrochemical characteristics of the alumina film forming on the pure aluminum was discussed in this investigation. At the forming voltage less than 100V, the anodized films formed at 85 ℃in aqueous ammonium adipate electrolyte was amorphous in nature. Although the film resistance was increased with the forming voltage, its dielectric constant was not changed significantly. As the forming voltage exceeded 100V, crystalline …

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Cavitation Erosion Behavior Of Ni-Al Intermetallic Coatings, Chang J.T., H. Yeh C., He J.L., Chen K.C. May 2003

Cavitation Erosion Behavior Of Ni-Al Intermetallic Coatings, Chang J.T., H. Yeh C., He J.L., Chen K.C.

Journal of Electrochemistry

A cathodic arc plasma ion plating process was demonstrated to deposit Ni_Al film on AISI 1045 carbon steel to evaluate the cavitation protection. Three target materials with Ni52Al48, Ni60Al40, and Ni70Al30 compositions were used to reveal the microstructural of coatings. Experimental results show that the nickel content in these deposits increased with the nickel content of the target material. The major phase of deposited film was Ni3Al regardless of the target materials. All of the as_deposited films presented very strong adhesion and reflects their cavitation erosion behavior in fresh water. All coatings increased the cavitation erosion resistance of the bare …

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Metastable Pitting Of Aluminum Anodic Film In Neutral Sodium Chloride Solution, Jing-Mao Zhao, Zhi-Jun Bai, Yu Zuo May 2003

Metastable Pitting Of Aluminum Anodic Film In Neutral Sodium Chloride Solution, Jing-Mao Zhao, Zhi-Jun Bai, Yu Zuo

Journal of Electrochemistry

Potentiodynamic polarization,electrochemical noise and SEM were used to study the corrosion behavior of L2 aluminum anodic film in 1 mol/L NaCl solutions.The results showed that anodic oxidization of aluminum increases its corrosion resistance greatly.However metastable pits were also observed when the film was thin or was exposed to the solutions for a long time.These pits with a diameter less than 10μm often occurred around the metallic inclusions in film.

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Perfluorinated Sulfonic Acid Lithium Conductivity Humidity Sensor, Hong-Feng Xu, Jing Liu, Li Wan May 2003

Perfluorinated Sulfonic Acid Lithium Conductivity Humidity Sensor, Hong-Feng Xu, Jing Liu, Li Wan

Journal of Electrochemistry

Treat carbon paper with 3% PTFE solution and dried in 340 ℃ for 40 minutes to enhance its intension, and level off the surface of the carbon paper with a mixture of XC_72 carbon black and PTFE solution. With those treated carbon paper as electrodes,recast Nafion thin film from 5% Nafion solution as humidity sensitive material, a solid polymer electrolyte humidity sensor was prepared on a thin PET film.Take the relative humidity data from several saturated salt solutions, the relationship between conductivity response and relative humidity was studied at different relative humidies.The results showed: when the polymer electrolyte was H+ …

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Conductance Properties For Electrolyte Of Lithium Ion Battery At Low Temperature, Jing-Li Han, Yan-Mei Yu, Jian Chen, Chun-Tong Wang May 2003

Conductance Properties For Electrolyte Of Lithium Ion Battery At Low Temperature, Jing-Li Han, Yan-Mei Yu, Jian Chen, Chun-Tong Wang

Journal of Electrochemistry

The system of LiPF6_ethylene carbonate (EC) _methy1 acetate (MA) was studied. The conductivities of this system were measured under various composition and various salt concentrations at temperature range of 20～-50 ℃. The optimum composition of this system was selected. The tests of cyclic voltammography and charge_discharge were carried out. This system was compared with commercial electrolyte solution.

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Corrosion Prediction Of Carbon Steel In Concentrated Lithium Bromide Solutions At High Temperature Using Bp Neural Network, Nai-Bao Huang, Cheng-Hao Liang May 2003

Corrosion Prediction Of Carbon Steel In Concentrated Lithium Bromide Solutions At High Temperature Using Bp Neural Network, Nai-Bao Huang, Cheng-Hao Liang

Journal of Electrochemistry

Neutral network model has been developed for the computation of corrosion rate of carbon steel in LiBr solutions.The results indicate that the model is capable of reproducing the effects of changes in alkalinity,temperatures,LiBr and Na2MoO4 concentrations on the rates of general corrsion and good agreement between calculated and experimental corrosion rate is obtained.The model can be used to satisfactorily predict the corrosion rate of carbon steel in different concentrations of LiBr solutions containing different inhibitors at different temperatures.It also provides a novel method for corrosion monitoring of metals used in LiBr absorption chiller.

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The Electrochemical Behaviors Of A Novel Ferrocene Alkylthiol Sams On Au Electrode, Xiao-Gang Zhang, Yan-Li Shi, Hu-Lin Li May 2003

The Electrochemical Behaviors Of A Novel Ferrocene Alkylthiol Sams On Au Electrode, Xiao-Gang Zhang, Yan-Li Shi, Hu-Lin Li

Journal of Electrochemistry

A novel alkylthiol molecule containing ferrocene and pyridium moieties and its hydrogenated products were synthesized and subsequently assembled on Au electrode as SAMs. Cyclic voltammogram(CV) was used to investigate the structure_dependent electrochemical response of the SAMs in 0.1 mol/L HClO4 aqueous solution.

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Development Of A Mechanistic Understanding Of High-Temperature Deformation Of Alloy Ep-823 For Transmutation Applications Trp Task-10: Quarterly Progress Report (March 01 – May 31, 2003), Ajit K. Roy, Brendan O'Toole May 2003

Development Of A Mechanistic Understanding Of High-Temperature Deformation Of Alloy Ep-823 For Transmutation Applications Trp Task-10: Quarterly Progress Report (March 01 – May 31, 2003), Ajit K. Roy, Brendan O'Toole

Transmutation Sciences Materials (TRP)

The purpose of this project is to evaluate the elevated temperature tensile properties of Alloy EP- 823, a leading target material for accelerator-driven waste transmutation applications. This alloy has been proven to be an excellent structural material to contain the lead-bismuth-eutectic (LBE) nuclear coolant needed for fast spectrum operations. Very little data exist in the open literature on the tensile properties of this alloy. The test material will be thermally treated prior to the evaluation of its tensile properties at temperatures relevant to the transmutation applications. The deformation characteristics of tensile specimens, upon completion of testing, will be evaluated by …

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Spatially Resolved Spectroscopy Of Coma Cluster Early-Type Galaxies - Iii. The Stellar Population Gradients, D. Mehlert, D. Thomas, R. P. Saglia, R. Bender, G Wegner May 2003

Spatially Resolved Spectroscopy Of Coma Cluster Early-Type Galaxies - Iii. The Stellar Population Gradients, D. Mehlert, D. Thomas, R. P. Saglia, R. Bender, G Wegner

Dartmouth Scholarship

Based on Paper I of this series (Mehlert et al. 2000), we derive central values and logarithmic gradients for the Hβ, Mg and Fe indices of 35 early-type galaxies in the Coma cluster. We find that pure elliptical galaxies have on average slightly higher velocity dispersions, lower Hβ, and higher metallic line-strengths than galaxies with disks (S0). The latter form two families, one comparable to the ellipticals and a second one with significantly higher Hβ, and weaker metallic lines. Our measured logarithmic gradients within the effective radius are ⟨△Mg b⟩ ≈ −0.037, ⟨△⟨Fe⟩⟩ ≈ −0.029, ⟨△Hβ⟩ ≈ +0.017 and ⟨△σ⟩ …

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Study Of Scalar Mesons And Related Radiative Decays, Joseph Schechter, Deirdre Black, Masayasu Harada May 2003

Study Of Scalar Mesons And Related Radiative Decays, Joseph Schechter, Deirdre Black, Masayasu Harada

Physics - All Scholarship

After a brief review of the puzzling light scalar meson sector of QCD, a brief summary will be given of a paper concerning radiative decays involving the light scalars. There, a simple vector meson dominance model is constructed in an initial attempt to relate a large number of the radiative decays involving a putative scalar nonet to each other. As an application it is illustrated why a_0(980)-f_0(980) mixing is not expected to greatly alter the f_0/a_0 production ratio for radiative \phi decays.

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