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Articles 1 - 30 of 549
Full-Text Articles in Physical Sciences and Mathematics
Anneli Lax: In Memoriam, Elena Anne Corie Marchisotto
Anneli Lax: In Memoriam, Elena Anne Corie Marchisotto
Humanistic Mathematics Network Journal
No abstract provided.
Teaching A Humanities Course: A Mathematician’S View, Bill Marion
Teaching A Humanities Course: A Mathematician’S View, Bill Marion
Humanistic Mathematics Network Journal
No abstract provided.
Word Problems, Don Pfaff
A Response To Dancis, Margaret Schaffer
A Response To Dancis, Margaret Schaffer
Humanistic Mathematics Network Journal
No abstract provided.
Another Response To Dancis, Ted Eisenberg
Another Response To Dancis, Ted Eisenberg
Humanistic Mathematics Network Journal
No abstract provided.
Evaluation In The Mathematics Classroom, Emam Hoosain, B. Naraine
Evaluation In The Mathematics Classroom, Emam Hoosain, B. Naraine
Humanistic Mathematics Network Journal
No abstract provided.
What Is The Thing Called “Humanistic Mathematics?”, Tamar Apel
What Is The Thing Called “Humanistic Mathematics?”, Tamar Apel
Humanistic Mathematics Network Journal
No abstract provided.
Mathematics Is An Art: The Story Of A One-Time Course, Paul Fjelstad
Mathematics Is An Art: The Story Of A One-Time Course, Paul Fjelstad
Humanistic Mathematics Network Journal
No abstract provided.
A Reflection On The Word: Remembering The Word “Word” Is Reflexive, Paul Fjelstad, Ivan Ginchev
A Reflection On The Word: Remembering The Word “Word” Is Reflexive, Paul Fjelstad, Ivan Ginchev
Humanistic Mathematics Network Journal
No abstract provided.
Calculus For The Liberal Arts: A Humanistic Approach, Kathleen Shannon
Calculus For The Liberal Arts: A Humanistic Approach, Kathleen Shannon
Humanistic Mathematics Network Journal
No abstract provided.
Ode To Mathematics, Sandra Z. Keith
Ode To Mathematics, Sandra Z. Keith
Humanistic Mathematics Network Journal
No abstract provided.
Excerpts From Ivan’S Commandments To Himself, Ivan Niven
Excerpts From Ivan’S Commandments To Himself, Ivan Niven
Humanistic Mathematics Network Journal
No abstract provided.
Divisibility: A Problem Solving Approach Through Generalizing And Specializing, Rina Zazkis
Divisibility: A Problem Solving Approach Through Generalizing And Specializing, Rina Zazkis
Humanistic Mathematics Network Journal
No abstract provided.
The Role Of Values In Mathematics Education, Murad Jurdak
The Role Of Values In Mathematics Education, Murad Jurdak
Humanistic Mathematics Network Journal
No abstract provided.
Book Review: A Tour Of The Calculus By David Berlinski, Bernard Fleishman
Book Review: A Tour Of The Calculus By David Berlinski, Bernard Fleishman
Humanistic Mathematics Network Journal
No abstract provided.
Book Review: Mathematical Reflections By Peter Hilton, Derek Holton And Jean Pedersen, Ladnor Geissinger
Book Review: Mathematical Reflections By Peter Hilton, Derek Holton And Jean Pedersen, Ladnor Geissinger
Humanistic Mathematics Network Journal
No abstract provided.
Roots, Don Pfaff
Tea Tasting And Pascal Triangles, Paul Alper, Yongzhi Yang
Tea Tasting And Pascal Triangles, Paul Alper, Yongzhi Yang
Humanistic Mathematics Network Journal
No abstract provided.
What Else Do We Forget To Tell Our Teachers?: A Response To Dancis, Stephen Sproule
What Else Do We Forget To Tell Our Teachers?: A Response To Dancis, Stephen Sproule
Humanistic Mathematics Network Journal
No abstract provided.
The Preparation Of Flexible Polymeric Anode And The Measurement Of Its Protective Ability For Cathodic Protection, Ailing Du, Heming Zhang, Mingzong Zhang
The Preparation Of Flexible Polymeric Anode And The Measurement Of Its Protective Ability For Cathodic Protection, Ailing Du, Heming Zhang, Mingzong Zhang
Journal of Electrochemistry
The flexible electrode,whose shape can be changed freely,was made of ethenyl copolymer and conductive component and proper amount of additive for cathodic protection.The resistance of electrode was measured.In low concentration of H 2SO 4,the flexible electrode can be used as auxiliary anode to protect the carbon steel.The protection ability of the flexible auxiliary anode was measured too.
Surface Enhanced Raman Spectroscopic Study Of Scn - Adsorbed At The Copper And Gold Nanowire Arrays, Jianlin A Yao, Guoping Pan, Kuanhong Xue, Yong Xie, Jing Tang, Bin Ren, Dongmei Sun, Bingwei Mao, Zhongqun Tian
Surface Enhanced Raman Spectroscopic Study Of Scn - Adsorbed At The Copper And Gold Nanowire Arrays, Jianlin A Yao, Guoping Pan, Kuanhong Xue, Yong Xie, Jing Tang, Bin Ren, Dongmei Sun, Bingwei Mao, Zhongqun Tian
Journal of Electrochemistry
Two_dimensional arrays of Cu and Au nanowires have been fabricated by template synthesis method, using the anodic aluminum oxidation films as the template. The morphology of the nanowire array was monitored by atomic force microscope (AFM) in the dissolution processes of the alumina film. Based on the probe molecule strategy, the spectral feature of SCN - adsorbed at the Cu and Au nanowires with different diameters has been investigated by surface enhanced Raman spectroscopy (SERS). The results reveal that the intensity of the SERS bands depends on the length of the exposed nanowires. The C≡N stretching vibration frequency (ν CN …
Study On Electrochemical Reduction Properties Of Nitrobenzene, Chuna Ma, Wenkui Zhang, Hui Huang, Yongping Gan
Study On Electrochemical Reduction Properties Of Nitrobenzene, Chuna Ma, Wenkui Zhang, Hui Huang, Yongping Gan
Journal of Electrochemistry
The electrochemical reduction characteristics of nitrobenzene was extensively investigated by using the techniques such as quasi_steady_state polarization,cyclic voltammetry,fast linear potential sweep method and chronoamperometry in this paper.The electroanalytic properties of Cu,Cu_Hg and Cu_Ni electrodes were evaluated.Based on the study of the transient steping behaviour of nitrobenzene to PAP,the reduction mechanism was discussed.The results showed that the transition steps existed on the electrochemical reduction of nitrobenzene in acidic solution,the reactant is also absorbed on electrodes surface. The control step in the reduction of nitrobenzene was ascribed to the diffusion of nitrobenzene and its electrochemical reductive products in the acid solution.
A Novel Reaction Region Moving Electrode System For Electrochemical Power Sources, Jinkua You, Que Tu, Zhengjian Wang, Jie Sun, Zugeng Lin
A Novel Reaction Region Moving Electrode System For Electrochemical Power Sources, Jinkua You, Que Tu, Zhengjian Wang, Jie Sun, Zugeng Lin
Journal of Electrochemistry
In most of practical rechargeable batteries, charging/discharging process is always concerned with phase_transformation in the solid state. Due to the irreversibility of the phase_transformation, the cyclic performance of the rechargeable batteries are limited. In this paper, a novel reaction_region moving counter electrode system is constructed in our laboratory. The electrode system is operated at room temperature and cycled in solid_liquid phase during charging/discharging processes. With this electrode, the metal_complexes are firstly deposited(i.e. charging process) on the nearest working electrode and gradually extended to those another working electrodes several centimeters away from the counter electrode. The deposite is dissolved again into …
High Performance Proton Exchange Membrane Fuel Cells, Jingrong Yu, Baolian Yi, Ming Han, Xiaoliang Cheng, Zhigang Shao, Jingxin Zhang
High Performance Proton Exchange Membrane Fuel Cells, Jingrong Yu, Baolian Yi, Ming Han, Xiaoliang Cheng, Zhigang Shao, Jingxin Zhang
Journal of Electrochemistry
Proton_exchange membrane fuel cells(PEMFC) using a perfluorosulfonic acid proton exchange membrane as an electrolyte can simplify water and electrolyte management.In this paper,the effects of thickness of PEM on the performance of PEMFC were studied.The Nafion_112 PEM and low platinum loading E_TEK electrode yielded very high power density,of the order of 0.95 W/cm 2.The energy_conversion efficiency,the degree of platinum utilization and stability for PEMFC using Nafion 112 and E_TEK electrode were also investigated.
Electrochemical Studies Of Metal Complexes In Solution, Yexiang Tong, Beisheng Kang, Qiqin Yang
Electrochemical Studies Of Metal Complexes In Solution, Yexiang Tong, Beisheng Kang, Qiqin Yang
Journal of Electrochemistry
The prospectus of electrochemical studies of metal complexes in solution have been introduced as a background of our research work. The electrochemical behaviors of the metal complexes and clusters have been investigated by many kinds of electrochemical methods.The content includes the standard electrode potential and the related equilibrium constant, electrochemical kinetics and the related behavior of structure, electrocatalysis and electrosynthesis of metal complexes. The electrode reaction mechanisms of the complexes have been approached. The methods for measuring some thermodynamic and kinetic parameters of the complexes are also given. Electrochemical studies would provid many kinds of important information for studying the …
Photoelectrochemical Studies On The Tio_2 Nanostructured Porous Film Sensitized By Cyanine Dye, Li Zhang, Maizhi Yang, Xuebin Qiao, Yanzhong Hao, Enqing Gao, Shengmin Cai
Photoelectrochemical Studies On The Tio_2 Nanostructured Porous Film Sensitized By Cyanine Dye, Li Zhang, Maizhi Yang, Xuebin Qiao, Yanzhong Hao, Enqing Gao, Shengmin Cai
Journal of Electrochemistry
The photoelectrochemical behaviors of the TiO 2 nanostructured porous film sensitized by cyanine dye were investigated in this paper.The results showed that the excitaed state level matched the conduction band edge of TiO 2 nanoparticle.Therefore the sensitization of the dye can increase the photocurrent intensity of the TiO 2 nanostructured electrode obviously and results in a red-shift of optical absorption from the ultra_violet region to the visible.As a result,the light_to _electricity conversion efficiency was improved evidently,the maximum value of IPCE has reached 12.1%.
Investigation Of Sodium Hypophosphite Anodic Oxidizing Behavior In The Process Of Acid Electroless Nickel Deposition, Meiyuan Wang, Yafei Kuang, Yan Xu
Investigation Of Sodium Hypophosphite Anodic Oxidizing Behavior In The Process Of Acid Electroless Nickel Deposition, Meiyuan Wang, Yafei Kuang, Yan Xu
Journal of Electrochemistry
The anodic oxidizing behavior of sodium hypophosphite in the process of electroless nickle deposition(pH=5.5) was investigated with the linear potential sweep method and alternating current impedance.The results indicated that,the oxidation of NaH 2PO 2 was a complicated electrochemical process and affected by the concentration of NaH 2PO 2, the temperature of the bath,the sweep rate and the existence of nickel ion. The NaH 2PO 2 electrooxidation reaction was very likely preceded by heterogeneous interface transformation process,which might be the control step of the whole anodic process.
Prparation Of Nanocrystaline Tio_2(Anatase)With High Thermal And Textural Sability By Electrochemical Method, Daobao Chu, Xingfu Zhou
Prparation Of Nanocrystaline Tio_2(Anatase)With High Thermal And Textural Sability By Electrochemical Method, Daobao Chu, Xingfu Zhou
Journal of Electrochemistry
Titanium alkoxides were prepared by anodic dissolution of metallic titanium in absolute ethanol in the presence of HN(C 2H 5) 2·HCl (electro_conductive additives).The solution was directly hydrolyzed to prepare nanocrystalline of TiO 2 (about 10nm)by a sol_gel process.The precursor gels was calcined at T =450 ℃ and 720 ℃for 30 min,and nanocrystalline of TiO 2 (anatase) with high textural and thermal stability was obtained.FTIR,XRD,TEM,were used to characterize the structure of titanium alkoxides and nanocrystalline of TiO 2.The characteristics of nanocrystalline of TiO 2 was depended on the properties of titanium alkoxides.The Ti(OEt) 4 as a source of titanium yielded the …
Studies Of The Electrode Preparation Of Electrode From Lead Carbonate For Lead Acid Battery Ⅰ The Activation Of The Pme, Zhongxu Dai, Dihua Wang, Junwei Jiang, Yunhong Zhou, Jinyun Zou
Studies Of The Electrode Preparation Of Electrode From Lead Carbonate For Lead Acid Battery Ⅰ The Activation Of The Pme, Zhongxu Dai, Dihua Wang, Junwei Jiang, Yunhong Zhou, Jinyun Zou
Journal of Electrochemistry
Lead carbonate which was an intermediate product in lead hydrometallurgy without pollution of lead vapor and sulfur dioxide was selected as electrode material of lead_acid batteries. In the present work,the performances of PbO 2/PbSO 4 or PbSO 4/Pb electrode transformed from PbCO 3 have been investigated by powder microelectrode technique combined with cyclic voltammetry.The results show that the CV characteristics of either negative or positive electrode prepared from PbCO 3 is as good as that of both electrodes made from lead oxide produced by mill machine,when a powder microelectrode with PbCO 3 transformed into PbSO 4 in 1.0 mol/L H …
A Gas Analysis Method For Determining The Perchlorate Current Efficiency And Other Applications, Zhigang Shao, Baolian Yi
A Gas Analysis Method For Determining The Perchlorate Current Efficiency And Other Applications, Zhigang Shao, Baolian Yi
Journal of Electrochemistry
A method for determining the current efficiency by means of measuring the flow capacity of the cell gas in a perchlorate cell has been proposed. The perchlorate cell system was equipped with an oxygen cathode or a Na + ion exchange membrane. This method is simple and convenient as well as accurate in the evaluation of the perchlorate current efficiency in the perchlorate cell as compared with the traditional methods of analysis. It is useful in the investigation of electrochemical problems with high perchlorate concentration,as well as for the assessment of electrocatalytic performance of anode materials.With an oxygen cathode in …