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A new four-dimensional chaotic system with first Lyapunov exponent of about 22,hyperbolic curve and circular paraboloid types of equilibria and its switching synchronization by an adaptive global integral sliding mode control

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Chinese Physics B 2018年第4期27卷 214-227页

作者： jay Prakash Singh Binoy Krishna roy Zhouchao Wei Department of Electrical Engineering National Institute of Technology Silchar Silchar 788010 India School of Mathematics and Physics China University of Geosciences Wuhan 430074 China

This paper presents a new four-dimensional（4 D） autonomous chaotic system which has first Lyapunov exponent of about 22 and is comparatively larger than many existing three-dimensional（3 D） and 4 D chaotic *** proposed system exhibits hyperbolic curve and circular paraboloid types of *** system has all zero eigenvalues for a particular case of an equilibrium *** system has various dynamical behaviors like hyperchaotic,chaotic,periodic,and *** system also exhibits coexistence of *** behavior of the new system is validated using circuit *** an interesting switching synchronization phenomenon is proposed for the new chaotic *** adaptive global integral sliding mode control is designed for the switching synchronization of the proposed *** the switching synchronization,the synchronization is shown for the switching chaotic,stable,periodic,and hybrid synchronization *** of the controller designed in the paper is compared with an existing controller.

关键词： new hyperchaotic system maximum chaos an infinite number of equilibria hidden attractors switching synchronization global sliding mode control

New Sensor Concepts for Enhancing Heat Treatment Processes and Analysis

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材料热处理学报 2004年第5期25卷 443-446页

作者： jay I. Frankel Mechanical Aerospace and Biomedical Engineering Department University of Tennessee Knoxville Tennessee USA

The need for developing accurate quenching models requires an extensive experimental database that includes surface heat flux characterization. Quantification of the quenching process permits i) the development of high-quality heat treated products, ii) the evaluation of new quenchants and quenchant systems, and iii) the evaluation of quenchant quality over usage time. The surface heat transfer coefficient (or heat flux) is rarely measured, calculated or modeled in sufficient detail for real scientific use. Many single-thermocouple based probes are designed for the purpose of measuring the cooling power of a liquid quenchant or for monitoring quenchant quality. Lumped based probes are sufficient for these types of applications. However, the lack of sufficient distributed detail impedes the development of future high-quality heat-treated products. Frankel and his coworkers are developing a new family of transient thermal-rate sensors that will improve both diagnostic and real-time analyzes in heat transfer studies. Analyzes have been performed indicating that there exists a novel, thermal-rate sensor hierarchy that stabilizes predictions when used with analysis. This concept can be used for investigating both (i) direct surface heat transfer effects, and (ii) projective surface analysis based on embedded sensors. This new sensor family includes the ability to measure temperature, T; heat flux, q"; and their temporal derivatives, i.e., dT/dt, d^T/dt2 and dq’Vdt.

关键词：传感器热处理热通量传热系数

Wernicke encephalopathy in children and adolescents

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World Journal of Pediatrics 2014年第4期10卷 293-298页

作者： Matt Lallas jay Desai Division of Neurology Children's Hospital Los AngelesCaliforniaUSA Keck School of Medicine of University of Southern California CaliforniaUSA

Background:Wernicke encephalopathy is caused by thiamine(vitamin B1)defi *** is generally considered to be a disease of adult ***,it is known to occur in the pediatric population and in non-alcoholic *** sources:We searched PubMed with the key words Wernicke,thiamine,pediatric,children and adolescents and selected publications that were deemed ***:The global prevalence rates of hunger,poverty and resultant nutrient deprivation have decreased in the 21st ***,several scenarios which may predispose to Wernicke encephalopathy may be increasingly prevalent in children and adolescents such as malignancies,intensive care unit stays and surgical procedures for the treatment of *** predisposing conditions include magnesium defi ciency and defects in the SLC19A3 gene causing thiamine transporter-2 *** classic triad consists of encephalopathy,oculomotor dysfunction and gait ataxia but is not seen in a majority of *** should be instituted immediately when the diagnosis is suspected clinically without waiting for laboratory confi *** magnetic resonance findings include symmetric T2 hyperintensities in dorsal medial thalamus,mammillary bodies,periaqueductal gray matter,and tectal ***:Wernicke encephalopathy is a medical *** in its recognition and treatment may lead to significant morbidity,irreversible neurological damage or even *** article aims to raise the awareness of this condition among pediatricians.

关键词： ataxia ophthalmoplegia thiamine vitamin B1 Wernicke encephalopathy

Children with Disabilities and Disaster risk reduction: A review

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International Journal of Disaster risk Science 2015年第1期6卷 38-48页

作者： Steve ronoh JC Gaillard jay Marlowe School of Environment The University of Auckland School of Counselling Human Services and Social WorkThe University of Auckland

Children with disabilities are often excluded from disaster risk reduction (Drr) initiatives and, as a result, can experience amplified physical, psychological, and educational vulnerabilities. research on children with disabilities during disasters is lacking, and their potential value in helping shape inclusive policies in Drr planning has been largely overlooked by both researchers and policymakers. This article highlights the existing research and knowledge gap. The review includes literature from two areas of scholarship in relation to disasters—children, and people with disabilities—and provides a critique of the prevailing medical, economic, and social discourses that conceptualize disability and associated implications for Drr. The article analyzes the different models in which disability has been conceptualized, and the role this has played in the inclusion or exclusion of children with disabilities in Drr activities and in determining access to necessary resources in the face of disaster. Finally, the study explores possible pathways to studying the contribution and involvement of children with disabilities in Drr.

关键词： Children with disabilities Disability concepts Disaster risk reduction Vulnerability

Topographic Influence on Wetland Distribution and Change in Maduo County, Qinghai-Tibet Plateau, China

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Journal of Mountain Science 2012年第3期9卷 362-371页

作者： jay GAO LI Xilai Gary BrIErLEY School of Environment University of Auckland lo Symonds Street Auckland New Zealand College of Agriculture andAnimal Husbandry Qinghai University Xining 810016 China

Accurate information on the spatial distribution and temporal change of wetlands is vital to devise effective measures for their protection. This study uses satellite images in 1994 and 2001 to assess the effects of topography and proximity to channels on wetland change in Maduo County on the Qinghai-Tibet Plateau, western China. In 1994 wetlands in the study area extended over 6,780.0 km2. They were distributed widely throughout the county, with a higher concentration in the south, and were especially prominent close to streams. The pattern of wetlands demonstrated a bell-shaped distribution curve with elevation, ranging over hill slopes with gradients from 0-19°, the commonest gradient being around 3°. Although the aspects of these hill slopes range over all directions, there is a lower concentration of wetlands facing east and southeast. The extent of wetlands in 2001 decreased to 6,181.1 km2. Marked spatial differentiation in the pattern of wetlands is evident, as their area increased by 1,193.3 km2 at lower elevations but decreased by 1,792.2 km2 at higher ground, resulting in a net decrease of 598.8 km2. In areas with a gradient r >9° the area of wetlands remained approximately consistent from 1994-2001. Newly retained wetlands are situated in relatively flat lowland areas, with no evident preference in terms of aspect. Wetlands on north-, east- and northeast-facing hillslopes with a bearing of 1-86° were more prone to loss of area than other orientations. The altered pattern of wetland distribution from higher to lower elevation on north-facing slopes coincided with the doubling of annual temperature during the same period, suggesting that climate warming could be an important cause.

关键词： Wetland change detection Topographicinfluence remote Sensing GIS Qinghai-TibetPlateau

Female mate choice for multimodal courtship and the importance of the signaling background for selection on male ornamentation

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Current Zoology 2013年第2期59卷 200-209页

作者： jay A. STAFSTrOM Eileen A. HEBETS School of Biological Sciences University of Nebraska Lincoln NE 68588-0118 USA

Conspicuous visual ornaments are frequently incorporated into complex courtship displays that integrate signal com- ponents from multiple sensory modalities. Mature male Schizocosa crassipes （Walckenaer, 1837） wolf spiders wave, arch, and tap their ornamented forelegs in a visual courtship display that simultaneously incorporates seismic components. To determine the importance of modality-specific signal components in female mate choice, we used a signal ablation design and compared the mating frequency of female-male pairs across signaling environments with manipulated modality-specific transmission properties. We found that the successful transmission of isolated visual or seismic signaling was sufficient for mating success; neither sig- naling modality was necessary. Additionally, the environment enabling the successful transmission of composite, multimodal dis- plays yielded the highest mating frequencies. Our results indicate the presence of selection from S. crassipes females for multi- modal courtship and suggest that multimodal signaling may facilitate mating across variable signaling environments. We next ex- plored the influence of ornamentation per se on female choice by phenotypically manipulating males into two groups：（i） intact （brushes present） and （ii） shaved （brushes absent）. We compared the mating frequencies of intact versus shaved males in the presence versus absence of seismic signaling. Males with brushes intact had higher mating frequencies than shaved males, but only under specific signaling conditions - in the presence of seismic signaling. Female choice for male brushes then appears de- pendent on the signaling background, making brushes themselves an unlikely target of direct selection. Our results emphasize the complex nature of female choice, highlighting the potential for both trait interactions and environment-dependent selection [Cur- rent Zoology 59 （2）： 200-209, 2013].

关键词： Enhancement Environmental variability Inter-signal interaction Sexual selection

Understanding Spatial Genome Organization:Methods and Insights

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Genomics, Proteomics & Bioinformatics 2016年第1期14卷 7-20页

作者： Vijay ramani jay Shendure Zhijun Duan Department of Genome Sciences University of WashingtonSeattleWA 98195USA Institute for Stem Cell and regenerative Medicine University of WashingtonSeattleWA 98109USA Division of Hematology University of WashingtonSeattleWA 98195USA Department of Medicine University of WashingtonSeattleWA 98195USA Howard Hughes Medical Institute SeattleWA 98195USA

The manner by which eukaryotic genomes are packaged into nuclei while maintaining crucial nuclear functions remains one of the fundamental mysteries in biology. Over the last ten years, we have witnessed rapid advances in both microscopic and nucleic acid-based approaches to map genome architecture, and the application of these approaches to the dissection of higher- order chromosomal structures has yielded much new information. It is becoming increasingly clear, for example, that interphase chromosomes form stable, multilevel hierarchical structures. Among them, self-associating domains like so-called topologically associating domains （TADs） appear to be building blocks for large-scale genomic organization. This review describes features of these broadly-defined hierarchical structures, insights into the mechanisms underlying their formation, our current understanding of how interactions in the nuclear space are linked to gene regulation, and important future directions for the field.

关键词： Chromatin ChromosomeEpigenomics 4D nucleomeHi-C

Chromium steel from chromite ore processing residue——A valuable construction material from a waste

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Frontiers of Environmental Science & Engineering 2011年第2期5卷 159-166页

作者： jay N.MEEGODA Wiwat KAMOLPOrNWIJIT Department of Civil&Environmental Engineering New Jersey Institute of TechnologyUniversity HeightsNewarkNJ 07102USA

As species we humans generate excessive amounts of waste and hence for sustainability we should explore innovative ways to recover *** primary objective of this study is to demonstrate an efficient and optimum way to recover chromium and iron from chromite ore processing residues(COPr)for the production of chrome steel and stainless *** Hudson County,New Jersey,there are more than two million tons of leftover *** of COPr was used as fill materials for construction sites,which spread the problem to a larger *** high solubility along with their toxicity leached chromate from COPr is threatening the environment as well as human *** this research,COPr was thermally treated to recover iron with chromium by applying techniques used in steel *** extensive experimental program was performed using a Thermo-Gravimetric Analyzer(TGA)and bench scale tests to thermally treat the processed chromium contaminated soils with carbon and sand at varying temperatures and under reducing *** optimum chemical composition of COPr and additives to be used in the melts were evaluated based upon the thermodynamic properties of the mixture to ensure good phase separation,least amounts of iron and chromium oxides in the slag and minimum variability of final product(steel or iron with chromium).The impact of other oxides on the steel making process was evaluated to minimize the adverse impact on the *** research demonstrated the feasibility of recovering a valuable construction material(chrome steel)from a waste(COPr).

关键词： chromite ore processing residue chromium steel reduction thermal treatment beneficial use

Effect of Ca:Mg ratio and high ammoniacal nitrogen on characteristics of struvite precipitated from waste activated sludge digester effluent

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Journal of Environmental Sciences 2019年第12期31卷 65-77页

作者： Chathurani Moragaspitiya jay rajapakse Graeme J.Millar Science and Engineering Faculty Queensland University of Technology (QUT)

This study revealed the relationship between the presence of calcium impurities and ammoniacal nitrogen concentration upon crystallization of *** research hypothesis was that the presence of both calcium and high concentrations of ammoniacal nitrogen(328–1000 mg/L)in waste activated sludge may influence the struvite quality and acid ***,we studied the impact of Ca:Mg ratio upon morphology,particle size,purity and dissolution of struvite,in the presence of varying levels of excess ammoniacal nitrogen.X-ray diffraction revealed that up to 31.4%amorphous material was made which was assigned to *** the ammoniacal nitrogen concentration and elevation of the Mg:Ca ratio maximized the presence of *** particle size was also increased by ammoniacal nitrogen as was twinning of the *** with dilute solutions of organic acid revealed the sensitivity of struvite dissolution to the physical characteristics of the *** particles(21.2μm)dissolved at higher rates than larger particles(35.86μm).However,struvite dissolved rapidly as the p H was further reduced irrespective of the physical ***,addition of struvite to low p H soils was not viewed as beneficial in terms of controlled nutrient ***,this study revealed that waste activated sludge effluent with high ammoniacal nitrogen was prospective for synthesis of high quality struvite material.

关键词： Struvite Purity Calcium Ammoniacal nitrogen Waste activated sludge