检索结果-南通市图书馆

Spinal intradural electrodes: opportunities, challenges and translation to the clinic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第3期19卷 503-504页

作者： bruce Harland Chien Yew Kow Darren Svirskis School of Pharmacy University of AucklandAucklandNew Zealand Department of Neurosurgery Auckland City HospitalAucklandNew Zealand

Damage to the spinal cord disrupts the electrically active nerve cells which normally transmit afferent and efferent signals,resulting in loss of motor,sensory,and autonomic *** treatments for spinal cord injury utilizing implanted spinal electrodes can be broadly classified into three different *** first of these approaches is“spinal stimulation”where electrodes,usually positioned above the level of injury,provide electrical stimulation to target and disrupt pain signals before they reach the *** second approach uses“activity-dependent neuro-technologies”,in which electrodes positioned below the level of injury initiate a complex spatiotemporal pattern of stimulation at the lumbar spinal cord to generate a walking gait in the limbs(Minev et al.,2015;Wagner et al.,2018).

关键词： stimulation electrodes utilizing

Propulsive matrix of a helical flagellum

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2014年第11期23卷 51-56页

作者：张何朋刘斌 bruce Rodenborn Harry L.Swinney Department of Physics and Astronomy and Institute of Natural Sciences School of Natural Sciences University of California Department of Physics and Center for Nonlinear Dynamics University of Texas at Austin

We study the propulsion matrix of bacterial flagella numerically using slender body theory and the regularized Stokeslet method in a biologically relevant parameter regime. All three independent elements of the matrix are measured by computing propulsive force and torque generated by a rotating flagellum, and the drag force on a translating flagellum. Nu- merical results are compared with the predictions of resistive force theory, which is often used to interpret micro-organism propulsion. Neglecting hydrodynamic interactions between different parts of a flagellum in resistive force theory leads to both qualitative and quantitative discrepancies between the theoretical prediction of resistive force theory and the numerical results. We improve the original theory by empirically incorporating the effects of hydrodynamic interactions and propose new expressions for propulsive matrix elements that are accurate over the parameter regime explored.

关键词： low-Reynolds-number flows micro-organism dynamics bacterial swimming

The role of preoperative immune modulating nutrition

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2020年第2期9卷 221-222页

作者： bruce R.Bistrian Department of Medicine Harvard Medical SchoolBeth Israel Deaconess Medical CenterBostonMAUSA

The meta-analysis by Adiamah et al.(1)clearly identifies the value of preoperative feeding with immune modulating nutrition(IMN)preoperatively in patients undergoing surgery for gastrointestinal cancer sufficient to make this a general recommendation by the relevant nutrition societies such as in future ESPEN and the Society of Critical Care Medicine-ASPEN guidelines(2,3).Previously ESPEN has recommended IMN in malnourished patients following major cancer surgery(2,4),but there has been some controversy as to whether IMN offered benefit beyond that seen with standard supplemental feeding in preoperative patients(5).However this present analysis appears to firmly establish the value of IMN in preoperative preparation of the gastrointestinal cancer patient undergoing *** said there are significant and important characteristics of their analysis of 16 randomized trials of solely preoperative feeding in patients with gastrointestinal cancer that may have been critical in determining the significant outcomes of a marked reduction in infectious complications by nearly 1/2(OR=0.52)with a P<0.0001 and length of hospital stay by 1.57 days(-2.48 to-0.66)with a P value<*** there was no impact on non-infectious complications,which might be anticipated,since enhancement of immune function would be expected to principally impact on the risk of infectious complications which could then secondarily influence length of *** the authors restricted the included studies to have only those patients with malignant disease with the preoperative feeding period to be at least 3 days,which included studies up to a total of 8 days *** former restriction tends to identify a group most likely to benefit from immune enhancement.

关键词： preoperative nutrition likely

A review of cavability evaluation in longwall top coal caving

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2017年第6期27卷 907-915页

作者： Tien Dung Le Rudrajit Mitra Joung Oh bruce Hebblewhite School of Mining Engineering The University of New South Wales Sydney NSW 2052 Australia

Longwall Top Coal Caving has been considered as one of the most effective technologies for the extraction of underground thick coal seams. A large number of studies on the applicability of Longwall Top Coal Caving into new mine sites have linked the success of its application to the geo mechanical understanding of the cavability of the top coal. The paper aims to improve the knowledge of the top coal cavability evaluation. A range of parameters that affect the top coal cavability were first identified. Afterward, a number of cavability assessment methods and classifications were reviewed. The result is important in that it assists researchers in developing an advanced and reliable tool for the top coal cavability evaluation.

关键词： Longwall top coal caving Cavability Numerical modelling Caving mechanism Caving classification

The response of ecosystem carbon and nitrogen pools to experimental warming in grasslands: a meta-analysis

在线全文

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2022年第4期15卷 733-742页

作者： Junliang Zou Juying Wu bruce Osborne Yiqi Luo Beijing Research&Development Centre for Grass and Environment Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China UCD School of Biology and Environmental Science and UCD Earth Institute University College DublinBelfeldDublin 4Ireland Center for Ecosystem Science and Society Department of Biological SciencesNorthern Arizona UniversityFlagstaffAZUSA

Carbon(C)and nitrogen(N)coupling processes in terrestrial ecosystems have the potential to modify the sensitivity of the global C cycle to climate *** the degree to which C–N interactions contribute to the sequestration of terrestrial ecosystem C(C_(seq)),both now and in the future,remains *** this study,we used a meta-analysis to quantitatively synthesize C and N responses from feld experiments on grasslands subjected to simulated warming and assessed the relative importance of three properties(changes in ecosystem N amount,redistribution of N among soil,litter and vegetation,and modifcations in the C:N ratio)associated with grassland C_(seq) in response to *** increased soil,litter and vegetation C:N ratios and approximately 2%of N shifted from the soil to vegetation and ***-induced grassland C_(seq) was the result of the net balance between increases in vegetation and litter C(111.2 g·m^(−2))and decreases in soil C(30.0 g·m^(−2)).Warming-induced accumulation of C stocks in grassland ecosystems indicated that the three processes examined were the main contributors to C_(seq),with the changes in C:N ratios in soil,litter and vegetation as the major contributors,followed by N redistribution,whilst a decrease in total N had a negative effect on C_(seq).These results indicate that elevated temperatures have a signifcant infuence on grassland C and N stocks and their coupling processes,suggesting that ecological models need to include C–N interactions for more accurate predictions of future terrestrial C storage.

关键词： climate change carbon sequestration carbon–nitrogen interactions grasslands nitrogen limitation stoichiometry

Elastic Optimization for Stragglers in Edge Federated Learning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Big Data Mining and Analytics 2023年第4期6卷 404-420页

作者： Khadija Sultana Khandakar Ahmed bruce Gu Hua Wang Institute for Sustainable Industries and Liveable Cities(ISILC) Victoria UniversityMelbourne 3011Australia Intelligent Technology Innovation Lab(ITIL) Institute for Sustainable Industries and Liveable Cities(ISILC)Victoria UniversityMelbourne 3011Australia. Shandong Computer Science Center(National Supercomputer Center) Jinan 250101China

To fully exploit enormous data generated by intelligent devices in edge computing,edge federated learning(EFL)is envisioned as a promising *** distributed collaborative training in EFL deals with delay and privacy issues compared to traditional centralized model ***,the existence of straggling devices,responding slow to servers,degrades model *** consider data heterogeneity from two aspects:high dimensional data generated at edge devices where the number of features is greater than that of observations and the heterogeneity caused by partial device *** large number of features,computation overhead on the devices increases,causing edge devices to become *** incorporation of partial training results causes gradients to be diverged which further exaggerates when more training is performed to reach local *** this paper,we introduce elastic optimization methods for stragglers due to data heterogeneity in edge federated ***,we define the problem of stragglers in ***,we formulate an optimization problem to be solved at edge *** customize a benchmark algorithm,FedAvg,to obtain a new elastic optimization algorithm(FedEN)which is applied in local training of edge *** mitigates stragglers by having a balance between lasso and ridge penalization thereby generating sparse model updates and enforcing parameters as close as to local *** have evaluated the proposed model on MNIST and CIFAR-10 *** experiments demonstrate that our approach improves run time training performance by achieving average accuracy with less communication *** results confirm the improved performance of our approach over benchmark algorithms.

关键词： edge computing federated learning distributed machine learning regularization stragglers

Clinical implications of reconsideration of enthesitis/enthesopathy/enthesial erosion,as tendon attachmentlocalized avulsions and stress fracture equivalents

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2024年第10期15卷 902-907页

作者： bruce M Rothschild Department of Medicine Indiana University Ball Memorial HospitalMuncieIN 47303United States

Recognizing the mechanical origin of enthesitis/enthesopathy and the avulsion-nature of what had previously been considered erosions,it seems inappropriate to attribute it to stresses related to a person’s normal ***,sudden or unconditioned repetitive stresses appears the more likely *** of enthesial reaction have lacked standardization as to findings present among individuals who appear to be *** evaluation by palpation and mani-pulation may be as effective as application of radiologic *** of the mechanical nature of the disease,including individuals with inflammatory arthritis suggests prescription of mechanical solutions that reduce stresses across the involved enthesis.

关键词： Enthesitis Epicondylitis Erosion Avulsion Clinical examination

Designation of a new genus Bathymenes for the deep-sea pontoniine shrimps of the 'Periclimenes alcocki species group'(Decapoda,Caridea,Palaemonidae),with a checklist of the species assigned to the genus

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 2016年第1期34卷 170-176页

作者：寇琦李新正 Alexander J.bruce Institute of Oceanology Chinese Academy of Sciences Crustacea Section Queensland Museum

A new genus of the deep-sea pontoniine shrimps,Bathymenes gen. nov.,is established for the 'Periclimenes alcocki species group' of the genus Periclimenes Costa,1844. The new genus is distinguished from other genera of the Pontoniinae by a combination of characters: the posteriormost dorsal rostral tooth remote from other teeth,situated in the epigastric position,cornea usually reduced,the propodus of second pereiopods covered with fine granules,the dactylus of the major second chela being generally flanged,the ambulatory pereiopods with the dactyli being biunguiculate and telson with more than two pairs of dorsolateral spines. The genus is mainly distributed in the tropical to warm-temperate Indo-West Pacific waters at depths greater than 200 m. Fifteen species previously recognized as belonging to the 'P.a lcocki species group' are now placed in Bathymenes gen. nov. A key for their identification and a checklist of congeneric species are provided.

关键词： Palaemonidae Pontoniinae Periclimenes Bathymenes deep-sea new genus

Performance enhancement of futuristic airplanes by nature inspired biomimetic fish scale arrays--A design approach

在线全文

学校读者我要写书评

暂无评论

Biomimetic Intelligence & Robotics 2022年第2期2卷 32-47页

作者： Ganesh Natarajan S bruce Ralphin Rose J Department of Mechanical Engineering Anna University Regional Campus TirunelveliTamilnaduIndia

Biomimetics has an immense potential to drive the next generation of technologies forward by propounding competent solutions from *** decades,the nonsmooth topography of most living creatures has been critical to their existence and *** to human-made smooth surfaces,when adapted for fluid flow applications,nonsmooth surfaces can enhance the overall aerodynamic performance by reducing the drag ***,the bioinspired scale structure of fish has been identified as a key biomimetic derivative for improving the aerodynamic efficiency in various cross-domain *** study investigates the aerodynamics of a fish scale array(FSA)NACA 0021 model at a specific Reynolds number(Re)of approximately 2.46×105 that is meant for laminar flow conditions using Computational Fluid Dynamics(CFD)tools and a subsonic wind tunnel facility.A 3D printed biomimetic FSA film is developed and affixed on the NACA 0021 wing profile for the experimental investigation,followed by flow visualization through the smoke tunnel *** proved qualitatively under specific aerodynamic conditions,the creation of velocity streaks has a major role in the drag reduction *** obtain a clear perspective of flow across the overlapping fish scale structures,the results are focused on the central and overlapping regions of the FSA *** experiment has proved the existence of a combined formation of low and high velocity streaks in central and overlapping *** FSA 0021 model showed a maximum drag reduction of 9.57%,which was attributed to the streak formation phenomenon observed in the overlapping FSA configuration.

关键词： Biomimetics Aerodynamics Fish scale arrays Drag reduction Bioinspired design