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The Impact of Work Relations,Micromanagement,and Flexibility on employee Dissatisfaction: A Study Amongst Public Servants in the Seychelles

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The Impact of Work Relations,Micromanagement,and Flexibility...

作者： Sally Stanio Paul bruce 上海财经大学

学位级别：硕士

With greater concerns and observations on the human resources landscape,employee wellbeing has motivated many entities to research deeper into the best practices that attracts a healthy,motivated,and loyal *** small island nation of Seychelles is no *** institutions also known as the public sector employs a significantly large portion of the ***,with little to no research,the area has been seldom mentioned in academic ***,the study bridges the gap and attempts to gather perceptions of public servants(workers within the public sector)and measures the extent to which specific factors(micromanagement,inflexibility,work relations)influence / affect job satisfaction within the public sector of *** study poses various theoretical as well as practical significance alongside a magnitude of benefits.

关键词： satisfaction,amongst,sector,motivation,employee,gathered,retention,questionnaire,likely,Motivation,

Rail temperature variation under heavy haul operations

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Railway engineering Science 2022年第2期30卷 148-161页

作者： Chris Bosomworth Maksym Spiryagin Sanath Alahakoon Colin Cole Ben Sneath bruce Makin Centre for Railway engineering Central Queensland UniversityRockhampton 4702Australia Australasian Centre for Rail Innovation Canberra 2601Australia ARC Infrastructure Perth 6105Australia

There currently does not exist in industry a reliable method for the detection of rail foot *** their head-based counterparts,foot flaws result in broken rail with potentially catastrophic consequences.A proposed area of research for the detection of these flaws is thermography,a non-contact method of measuring and analysing infrared emissions from an object under *** industry,active excitation thermography is the most common,requiring an excitation *** paper will present a temperature measurement system and a method of transient temperature extraction from the running rails for the effects of a passing train to evaluate heat transfer in the practical rail *** outcomes of these results will provide future direction in the development of a rail heat transfer model and determine if train passage provides enough active excitation for a thermography-based detection technique.

关键词： Rail heat transfer Rail foot flaws Field temperature measurement Transient temperature extraction

Bioreduction of vanadium(V) in groundwater by autohydrogentrophic bacteria:Mechanisms and microorganisms

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Journal of environmental Sciences 2015年第4期27卷 122-128页

作者： Xiaoyin Xu Siqing Xia Lijie Zhou Zhiqiang Zhang bruce e.Rittmann State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Swette Center for environmental Biotechnology Biodesign Institute at Arizona State University Key Laboratory of Yangtze River Water environment Ministry of Education College of Environmental Science and EngineeringTongji University

As one of the transition metals, vanadium（V）（V（V）） in trace amounts represents an essential element for normal cell growth, but becomes toxic when its concentration is above 1 mg/L. V（V） can alter cellular differentiation, gene expression, and other biochemical and metabolic phenomena. A feasible method to detoxify V（V） is to reduce it to V（IV）, which precipitates and can be readily removed from the water. The bioreduction of V（V） in a contaminated groundwater was investigated using autohydrogentrophic bacteria and hydrogen gas as the electron donor. Compared with the previous organic donors,H2 shows the advantages as an ideal electron donor, including nontoxicity and less production of excess biomass. V（V） was 95.5% removed by biochemical reduction when autohydrogentrophic bacteria and hydrogen were both present, and the reduced V（IV）precipitated, leading to total-V removal. Reduction kinetics could be described by a first-order model and were sensitive to p H and temperature, with the optimum ranges of p H 7.5–8.0 and 35–40°C, respectively. Phylogenetic analysis by clone library showed that the dominant species in the experiments with V（V） bioreduction belonged to theβ-Proteobacteria. Previously known V（V）-reducing species were absent, suggesting that V（V）reduction was carried out by novel species. Their selective enrichment during V（V）bioreduction suggests that Rhodocyclus, a denitrifying bacterium, and Clostridium, a fermenter known to carry out metal reduction, were responsible for V（V） bioreduction.

关键词： Vanadium Bioreduction Hydrogen Rhodocyclus Clostridium

Biodegradable magnesium materials regulate ROS-RNS balance in pro-inflammatory macrophage environment

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Bioactive Materials 2023年第5期23卷 261-273页

作者： Maria P.Kwesiga Amani A.Gillette Fatemeh Razaviamri Margaret e.Plank Alexia L.Canull Zachary Alesch Weilue He bruce P.Lee Roger J.Guillory II Department of Biomedical engineering Michigan Technological UniversityHoughtonMIUSA Morgridge Institute for Research MadisonWIUSA Department of Biomedical engineering University of Wisconsin-MadisonMadisonWIUSA

The relationship between reactive oxygen and nitrogen species(ROS-RNS)secretion and the concomitant biocorrosion of degradable magnesium(Mg)materials is poorly *** found that Mg foils implanted short term in vivo(24 h)displayed large amounts of proinflammatory F4/80+/iNOS+macrophages at the *** sought to investigate the interplay between biodegrading Mg materials(98.6%Mg,AZ31&AZ61)and macrophages(RAW 264.7)stimulated with lipopolysaccharide(RAW 264.7^(LPS))to induce ROS-RNS *** test how these proinflammatory ROS-RNS secreting cells interact with Mg corrosion in vitro,Mg and AZ61 discs were suspended approximately 2 mm above a monolayer of RAW 264.7 cells,either with or without ^(LPS).The surfaces of both materials showed acute(24 h)changes when incubated in the proinflammatory RAW 264.7^(LPS) *** discs incubated with RAW 264.7^(LPS) macrophages showed greater corrosion pitting,while AZ61 showed morphological and elemental bulk product changes via scanning electron microscopy-energy dispersive X-ray spectroscopy(SeM-eDX).X-ray photoelectron spectroscopy(XPS)analysis showed a reduction in the Ca/P ratio of the surface products for AZ61 disc incubated with RAW 264.7^(LPS),but not the Mg ***,RAW 264.7^(LPS) macrophages were found to be more viable in the acute biodegradative environment generated by Mg materials,as demonstrated by calcein-AM and cleaved(active)caspase-3 staining(CC3).^(LPS) stimulation caused an increase in ROS-RNS,and a decrease in antioxidant peroxidase *** and AZ61 were found to change this ROS-RNS balance,independently of physiological antioxidant *** findings highlight the complexity of the cellular driven acute inflammatory responses to different biodegradable Mg,and how it can potentially affect performance of these materials.

关键词： Biocorrosion Macrophage activation Nitroso-redox balance Mg

Nested Metal Catalysts:Metal Atoms and Clusters Stabilized by Confinement with Accessibility on Supports

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Precision Chemistry 2023年第1期1卷 3-13页

作者： bruce C.Gates Alexander Katz Jingyue Liu Department of Chemical engineering University of CaliforniaDavisDavisCalifornia 95616United States Department of Chemical and Biomolecular engineering University of CaliforniaBerkeleyBerkeleyCalifornia 94720United States Department of Physics Arizona State UniversityTempeArizona 85287United States

Supported catalysts that are important in technology prominently include atomically dispersed metals and metal *** the metals are noble,they are typically unstablesusceptible to sinteringespecially under reducing *** the metals in supports such as organic polymers,metal oxides,and zeolites confers stability on the metals but at the cost of catalytic activity associated with the lack of accessibility of metal bonding sites to *** approach to stabilizing noble metal catalysts while maintaining their accessibility involves anchoring them in molecular-scale nests that are in or on *** nests include zeolite pore mouths,zeolite surface cups(half-cages),raft-like islands of oxophilic metals bonded to metal oxide supports,clusters of non-noble metals(e.g.,hosting noble metals as single-atom alloys),and nanoscale metal oxide islands that selectively bond to the catalytic metals,isolating them from the *** examples illustrate a trend toward precision in the synthesis of solid catalysts,and the latter two classes of nested catalysts offer realistic prospects for economical large-scale application.

关键词： catalyst synthesis supported metal catalysts encapsulated catalysts nested catalysts atomically dispersed metal catalysts

Congenital diaphragmatic hernia survival in an english regional eCMO center

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World Journal of Pediatric Surgery 2023年第2期6卷 77-84页

作者： elizabeth O'connor Ryo Tamura Therese Hannon Sundeep Harigopal bruce Jaffray Paediatric surgery The Great North Children's HospitalNewcastle upon TyneTyne&WearUK Fetal medicine and obstetrics Royal Victoria InfirmaryNewcastle upon TyneTyne&WearUK Neonatal medicine Royal Victoria InfirmaryNewcastle upon TyneTyne&WearUK

Introduction Congenital diaphragmatic hernia(CDH)remains a cause of neonatal *** aims are to describe contemporary rates of survival and the variables associated with this outcome,contrasting these with our study of two decades earlier and recent *** and methods A retrospective review of all infants diagnosed in a regional center between January 2000 and December 2020 was *** outcome of interest was *** explanatory variables included side of defect,use of complex ventilatory or hemodynamic strategies(inhaled nitric oxide(iNO),high-frequency oscillatory ventilation(HFOV),extracorporeal membrane oxygenation(eCMO),and Prostin),presence of antenatal diagnosis,associated anomalies,birth weight,and *** changes were studied by measuring outcomes in each of four consecutive 63-month *** A total of 225 cases were *** was 60%(134 of 225).Postnatal survival was 68%(134 of 198 liveborn),and postrepair survival was 84%(134 of 159 who survived to repair).Diagnosis was made antenatally in 66%of *** associated with mortality were the need for complex ventilatory strategies(iNO,HFOV,Prostin,and eCMO),antenatal diagnosis,right-sided defects,use of patch repair,associated anomalies,birth weight,and *** has improved from our report of a prior decade and did not vary during the study *** survival has improved despite fewer *** multivariate analysis,the need for complex ventilation was the strongest predictor of death(OR=50,95%CI 13 to 224,ped anomalies ceased to be *** Survival has improved from our earlier report,despite reduced numbers of *** may be related to increased use of complex ventilatory strategies.

关键词： Survival termination sided

Smart Sediment Particle: A novel approach to investigating fluvial bed entrainment using instrumented sensors

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International Journal of Sediment Research 2023年第1期38卷 66-82页

作者： Yushu Xie bruce W.Melville Asaad Y.Shamseldin Colin N.Whittaker Yifan Yang Department of Civil and environmental engineering The University of Auckland School of engineering The University of Waikato

The Smart Sediment Particle(SSP) instrumented with multiple sensors to obtain tri-axial linear accelerations is used for studying the mechanism of coarse grain entrainment. Three bed arrangements are tested to examine their influences on entrainment processes and the threshold force and impulse conditions. The SSP shows satisfactory precision to capture the imperceptible movement tendencies immediately(e.g., 0.15 s) after the dislodgement. The experimental results show that bed packing can significantly affect the particle’s entrainment threshold and the path of movement. Lateral movement is predominant for some cases because the entrainment path is based on the least work done by the flow,even if the direction is not aligned with the flow. The concept of effective protrusion height is proposed to quantify the effect of local bed arrangement on entrainment. The mean velocity field around the SSP is also measured together with the acceleration data. The mean threshold velocity and resultant impulse show consistent dependence on the bed arrangement. In general, the SSP shows a good prospect of being used to study small-scale entrainment mechanism.

关键词： Smart Sediment Particle Instrumented sensors entrainment behaviours Tri-axial acceleration Hydrodynamic force impulse

exploring Inflation Options for Warm Dark Matter Coupled to the Higgs Boson

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International Journal of Astronomy and Astrophysics 2023年第3期13卷 217-235页

作者： bruce Hoeneisen Universidad San Francisco de Quito Quito Ecuador

We extend the Standard Model with a scalar warm dark matter field S with an interaction with the Higgs boson ∅. This warm dark matter scenario is in agreement with cosmological observations if S and ∅ come into thermal and diffusive equilibrium before the temperature drops below the Higgs boson mass mH. We study inflation driven by the fields ∅ or S, and also study preheating and reheating, in order to constrain the parameters of this extension of the Standard Model. It is remarkable that, with the current data, these models pass a closure test with no free parameters.

关键词： Warm Dark Matter Inflation Preheating Reheating

Warm Dark Matter and the Formation of First Galaxies

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Journal of Modern Physics 2022年第6期13卷 932-948页

作者： bruce Hoeneisen Universidad San Francisco de Quito Quito Ecuador

By numerical integration of hydro-dynamical equations, we study the formation of elliptical and spiral galaxies starting from primordial linear density-velocity-gravitational perturbations. Both dark matter and baryons are included. Warm dark matter perturbations acquire two low mass cut-offs: the free-streaming cut-off due to the power spectrum free-streaming cut-off factor τ2(k), and the velocity dispersion cut-off. The Press-Schechter mass distribution does not include velocity dispersion, and should not be used below the velocity dispersion cut-off mass. From the formation of first galaxies and reionization, we estimate limits on the non-relativistic warm dark matter velocity dispersion at expansion parameter , with .

关键词： Warm Dark Matter First Galaxies First Stars Population III Stars Reioniza-tion