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Now showing items 18-37 of 45

An evaluation of iron bioavailability and speciation in western Lake Superior with the use of combined physical, chemical, and biological assessment

Hassler Christel; Havens S; Bullerjahn G; Mckay R; Twiss M (Amer Soc Limnology and Oceanography, 2009)

An iron-dependent cyanobacterial bioreporter (Synechococcus strain KAS101) was used in unison with sizefractionated iron content (.0.45, ,0.45, ,0.02 mm), and chemical characterization of iron complexation (C18 resin column) ...
Flux Distribution at the Cross-Section Stacked Nanostructured Magnetic Ribbon

Lin Zhi Wei (Jack); Zhu Jianguo; Guo Youguang; Johansen T; Yoshizawa Y. (IEEE, 2009)

Conventional magnetization methods only measure the average magnetic properties over the whole sample. The information is insufficient to understand the local character. This paper presents the visualized magnetization ...
Heat budget and thermal microenvironment of shallow-water corals: Do massive corals get warmer than branching corals?

Jimenez Denness Isabel; Kuhl Michael; Larkum Anthony; Ralph Peter (Amer Soc Limnology Oceanography, 2008)

Coral surface temperature was investigated with multiple temperature sensors mounted on hemispherical and branching corals under (a) artificial lighting and controlled flow; (b) natural sunlight and controlled flow; and ...
High Temperature Superconducting Energy Storage Techniques

Jin Jianxun; Wang Zheng; Guo Youguang; Zhu Jianguo (Japanese Society of Applied Electromagnetics and Mechanics, 2007)
Hysteretic model for magnetorheological fluid dampers using a curve fitting approach

Hong Sia Minh; Nguyen Minh Tam; Kwok Ngai Ming; Ha Quang; Li Jianchun (Japanese Society of Applied Electromagnetics and Mechanics, 2007)

This paper presents a novel and simple model that describes the hysteretic force-velocity relationship of Magneto-Rheological (MR) fluid dampers and proposes an approach for the model parameter identification. The model ...
Improved Phase Variable Model and Field-Circuit Coupling Method for Performance Analysis of High Speed Brushless DC Motor

Chen Jiaxin; Guo Youguang; Zhu Jianguo (Japanese Society of Applied Electromagnetics and Mechanics, 2007)

This paper presents an improved phase variable model and field-circuit coupling method to evaluate the comprehensive performance of brushless DC (BLDC) motors in both steady and dynamic conditions. In the proposed model, ...
Improved Sequential Optimization Method for High Dimensional Electromagnetic Optimization Problem

Lei Gang; Shao Ke; Guo Youguang; Zhu Jianguo; Lavers J (IEEE, 2009)

Improved sequential optimization method (SOM) and dimension reduction optimization method (DROM) are presented for high dimensional optimization design problems of electromagnetic devices. Improved SOM can simultaneously ...
Light dependence of selenium uptake by phytoplankton and implications for predicting selenium incorporation into food webs

Baines Stephen; Fisher Nicholas; Doblin Martina; Cutter Gregory; Cutter Lynda; Cole Brian (American Society of Limnology and Oceanography, Inc., 2004)

The potentially toxic element selenium is first concentrated from solution to a large but highly variable degree by algae and bacteria before being passed on to consumers. The large loads of abiotic and detrital suspended ...
Links between ecotoxicology biomonitoring and water chemistry in the integration of water quality into environmental flow assessments.

Palmer Carolyn; Scherman Patrica; Muller Wilhelmina (John Wiley and Sons, 2003)

Aquatic organisms have physico-chemical as well as flow habitat requirements. There are three main kinds of data which are useful in quantifying these requirements: chemical data which describe in-stream chemical conditions; ...
Magnetization Modeling of SMC Material with Rotating Fluxes

Guo Youguang; Zhu Jianguo; Zhong Jin Jiang; Lin Zhi Wei (Jack) (Japanese Society of Applied Electromagnetics and Mechanics, 2007)

This paper investigates a modified Stoner-Wahlfarth model, and a truncated asteroid is employed to model the magnetic characteristics of the SMC material under rotating field excitation. Through adjusting the truncation ...
Magnetorheological damper semiactive control for civil structures with symmetric quantised sliding mode controllers

Nguyen Thanh; Nguyen Minh Tam; Kwok Ngai Ming; Ha Quang; Samali Bijan (Japanese Society of Applied Electromagnetics and Mechanics, 2007)

A symmetric quantised sliding mode controller (SMC) is presented in this paper for semiactive control of civil structures using magnetorheological (MR) dampers. The application of high performance control is needed to ...
A microfluidic chemotaxis assay to study microbial behavior in diffusing nutrient patches

Seymour Justin; Ahmed T; Marcos M; Stocker R (American Society of Limnology and Oceanography Inc., 2008)

The nutrient environment experienced by planktonic microorganisms is patchy at spatiotemporal scales commensurate with their motility and the efficiency with which chemotactic microbes can exploit this heterogeneous seascape ...
Multilevel Optimisation for Surface Mounted PM Machines Incorporating with FEM

Wang Shuhong; Meng Xiangjun; Guo Ningning; Li Haibo; Qiu Jie; Zhu Jianguo; Guo Youguang; Liu Dikai; Wang Yi; Xu Wei (IEEE, 2009)

In this paper, multilevel genetic algorithm (MLGA) is presented to solve the optimization of surface mounted permanent magnet synchronous machine (SPMSM), which has features of mixed continuous and discrete design variables, ...
Performance Analysis of an SMC Transverse Flux Motor with Brushless DC Control Scheme

Guo Youguang; Chen Jiaxin; Zhu Jianguo; Lu Hai Yan; Jin Jianxun (Japanese Society of Applied Electromagnetics and Mechanics, 2007)

Due to their unique properties such as magnetic isotropy and low eddy current loss, soft magnetic composite (SMC) materials are particularly suitable for electrical machines with complex structure and three-dimensional ...
A Permanent Magnet Synchronous Motor Model with Core Loss

Yan Ying; Zhu Jianguo; Guo Youguang (Japanese Society of Applied Electromagnetics and Mechanics, 2007)

This paper presents an improved model of permanent magnet synchronous motors (PMSMs) considering core losses. The core losses of a surface mounted PMSM were measured at no-load and load, and the analysis on experimental ...
A Phase Variable Model of Flyback Switching Converters Based on Numerical Magnetic Field Analysis Coupled With External Circuits

Chen Jiaxin; Guo Youguang; Zhu Jianguo (Japanese Society of Applied Electromagnetics and Mechanics, 2007)

This paper presents a fast and accurate phase variable model of flyback switching converters. A modified dynamic circuit model of high frequency transformer, capable of including the effect of all types of core loss, is ...
Photosynthetic Pigment Concentrations, Gas Exchange and Vegetative Growth for Selected Monocots and Dicots Treated with Two Contrasting Coal Fly Ashes

Yunusa Isa; Burchett Margaret; Veeragathipillai Manoharan; Desilva Lionel; Eamus Derek; Skilbeck Charles (Amer Soc Agronomy, 2009)

There is uncertainty as to the races of coal fly ash needed for optimum physiological processes and growth. In the current study we tested the hyothesis that photosynthetic pigments concentrations and CO2 assimilation (A) ...
Porous underwater chamber (PUC) for in-situ determination of nutrient and pollutant bioavailability to microorganisms

Hassler Christel; Twiss M; Simon D; Wilkinson K (American Society of Limnology and Oceanography Inc., 2008)

Physical (e.g., temperature and light) and biogeochemical (e.g., cycling) parameters are known to affect bioavailability and toxicity of nutrients and pollutants to microorganisms. A system that would allow exposure of ...
Radiocarbon dating and sedimentation rates for holocene-upper pleistocene sediments, eastern equatorial pacific and Peru continental margin

Skilbeck Charles; Fink David (Texas A&M University, 2006)
Reduced performance of native infauna following recruitment to a habitat-forming invasive marine alga

Gribben Paul; Wright Jeffrey; O'Connor Wayne; Doblin Martina; Eyre Bradley; Steinberg Peter (Springer, 2009)

Despite well-documented negative impacts of invasive species on native biota, evidence for the facilitation of native organisms, particularly by habitat-forming invasive species, is increasing. However, most of these studies ...

Now showing items 18-37 of 45

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