检索结果-南通市图书馆

International Journal of Disaster Risk Science 2022年第5期13卷 691-704页

作者： Douglas Thomas jennifer Helgeson National Institute of Standards and Technology GaithersburgMD 20899USA

This study examined the effect of natural hazards on manufacturing industry value added and the sensitivity of the results from changes to spatiotemporal resolution of the *** measured the negative effects of hazards,rather than the net *** models were developed with varying spatio temporal units for the continental United States:annual/county units;annual/state units;and quarterly/state *** simulations were run using each model to estimate the negative effect of damage from all natural hazards on value added across spatiotemporal ***,an investment analysis was conducted to examine the return from public investments in hazard *** results do not demonstrate that,locally,natural hazards reduce value ***,the evidence suggests that natural hazards in the upstream supply chain have statistically significant impact when modeled at the annual/county scale and at the quarterly/state *** local nor supply chain hazards have a statistically significant effect when modeled at the annual/state scale,suggesting that broader spatiotemporal units may obscure the true downstream effects of natural *** investment analysis,utilizing model results,suggests that an investment of USD 100 billion or less is economical if it results in a reduction in losses of 10% or more.

关键词： Manufacturing Natural hazards Spatiotemporal impacts United States Value added

Klotho and neurons: mutual crosstalk between autophagy, endoplasmic reticulum, and inflammatory response

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2021年第8期16卷 1542-1543页

作者： jennifer Mytych Department of Animal Physiology and Reproduction Institute of Biology and BiotechnologyCollegium Scientarium NaturaliumUniversity of RzeszowWerynia 236-100 KolbuszowaPoland

Klotho is one of a number of well-known longevity-associated *** depletion in aging or disease may promote several neuropathologies associated with the central nervous system,including hypomyelination and phosphorylat... 详细信息

关键词： Klotho inflammation reticulum

Turbulent burst around experimental spur dike

在线全文

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2011年第4期26卷 471-486+523页

作者： jennifer DUAN Department of Civil Engineering and Engineering Mechanics University of Arizona

Three-dimensional turbulent flow field was measured around an experimental spur dike by using a micro-acoustic Doppler *** fractions of turbulent burst events including outward interaction,ejection,inward interaction,and sweep were analyzed in each quadrant at the neighbor of the dike before and after the formation of scour *** 80%of burst events near the bed have lower-order of magnitudes for both flat and scoured bed *** and sweeps are prevalent before the local scour was initiated,and then outward interactions are dominant after the scour hole was *** Reynolds stresses and high-order moments of turbulent velocities were analyzed along the *** magnitudes of u’-w’ pair were much larger than those of v’-vv’ pair in the scour *** four burst events,ejections and sweeps are the higher order events contributing to the Reynolds *** sediment entrainment and transport are closely associated with turbulent bursts near bed,the development of scour hole greatly depends on the higher order event near the bed.

关键词： Turbulent burst Spur dike Quadrant analysis High-order momentums

Sub-Compartmental Organization of Golgi-Resident N-Glycan Processing Enzymes in Plants

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2011年第2期4卷 220-228页

作者： jennifer Schoberer Richard Strasser School of Life Sciences Oxford Brookes University Headington Campus Gipsy Lane Oxford OX3 OBP UK Department of Applied Genetics and Cell Biology University of Natural Resources and Life Sciences Vienna Austria

In all eukaryotes, the Golgi apparatus is the main site of protein glycosylation. It is widely accepted that the glycosidases and glycosyltransferases involved in N-glycan processing are found concentrated within the Golgi stack where they provide their function. This means that enzymes catalyzing early steps in the processing pathway are located mainly at the cis-side, whereas late-acting enzymes mostly locate to the trans-side of the stacks, creating a non-uniform distribution along the cis-trans axis of the Golgi. There is compelling evidence that the information for their sorting to specific Golgi cisternae depends on signals encoded in the proteins themselves as well as on the trafficking machinery that recognizes these signals and it is believed that cisternal sub-compartmentalization is achieved and maintained by a combination of retention and retrieval mechanisms. Yet, the signals, mechanism（s）, and molecular factors involved are still unknown. Here, we address recent findings and summarize the current understanding of this fundamental process in plant cell biology.

关键词： Endomembrane system Golgi apparatus glycosylation glycosyltransferase.

Application of Artificial Neural Networks to Rainfall Forecasting in Queensland,Australia

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2012年第4期29卷 717-730页

作者： John ABBOT jennifer MAROHASY Centre for Plant and Water Science Central Queensland UniversityBruce Highway Rockhampton Q.4702Australia

In this study, the application of artificial intelligence to monthly and seasonal rainfall forecasting in Queensland, Australia, was assessed by inputting recognized climate indices, monthly historical rainfall data, and atmospheric temperatures into a prototype stand-alone, dynamic, recurrent, time-delay, artificial neural network. Outputs, as monthly rainfall forecasts 3 months in advance for the period 1993 to 2009, were compared with observed rainfall data using time-series plots, root mean squared error （RMSE）, and Pearson correlation coefficients. A comparison of RMSE values with forecasts generated by the Australian Bureau of Meteorology＇s Predictive Ocean Atmosphere Model for Australia （POAMA）-I.5 general circulation model （GCM） indicated that the prototype achieved a lower RMSE for 16 of the 17 sites compared. The application of artificial neural networks to rainfall forecasting was reviewed. The prototype design is considered preliminary, with potential for significant improvement such as inclusion of output from GCMs and experimentation with other input attributes.

关键词： general circulation models artificial neural networks rainfall forecast

Tooth loss patterns in older adults with special needs:a Minnesota cohort

在线全文

学校读者我要写书评

暂无评论

International Journal of Oral Science 2011年第1期3卷 27-33页

作者： jennifer J.Clark Department of Dental Ecology University of North CarolinaChapel HillNC 27599USA

This study was conducted to detail tooth loss patterns in older adults with special needs. A total of 491 elderly subjects with special needs were retrospectively selected and followed during 10/1999-12/2006. Medical, dental, cognitive, and functional assessments were abstracted from dental records and used to predict risk of tooth loss. Tooth loss events were recorded for subjects during follow-up. Chi-squared tests were used to study the association between tooth loss and the selected risk factors. Logistic, poisson, and negative binomial regressions were developed to study tooth loss patterns. Overall, 27% of the subjects lost at least one tooth during follow-up. Fourteen subjects had tooth loss events per 100 person-years. Tooth loss pattern did not differ significantly among different special-needs subgroups （i.e. community-dwelling vs. long-term care, physically disabled vs. functionally independent）. Special-needs subjects with three or more active dental conditions at arrival had more than twice the risk of losing teeth than those without any existing conditions. After adjusting other factors, the number of carious teeth or retained roots at arrival was a significant predictor of tooth loss for older adults with special needs （P=0.001）. These findings indicate that appropriately managing active caries and associated conditions is important to prevent tooth loss for older adults with special needs.

关键词： tooth loss elderly special needs

Endoscopic treatment of Barrett's esophagus:From metaplasia to intramucosal carcinoma

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2010年第30期16卷 3780-3785页

作者： jennifer Chennat Irving Waxman Center for Endoscopic Research and Therapeutics Section of GastroenterologyDepartment of MedicineUniversity of Chicago Pritzker School of MedicineChicagoIL 60637United States

The annual incidence of adenocarcinoma arising from Barrett’s esophagus (BE) is approximately 0.5%. Through a process of gradual transformation from lowgrade dysplasia to high-grade dysplasia (HGD), adenocarcinoma can develop in the setting of BE. The clinical importance of appropriate identifi cation and treatment of BE in its various stages, from intestinal metaplasia to intramucosal carcinoma (IMC) hinges on the dramatically different prognostic status between early neoplasia and more advanced stages. Once a patient has symptoms of adenocarcinoma, there is usually locally advanced disease with an approximate 5-year survival rate of about 20%. Esophagectomy has been the gold standard treatment for BE with HGD, due to the suspected risk of harboring occult invasive carcinoma, which was traditionally estimated to be as high as 40%. In recent years, the paradigm of BE early neoplasia management has recently evolved, and endoscopic therapies (endoscopic mucosal resection, radiofrequency ablation, and cryotherapy) have entered the clinical forefront as acceptable non-surgical alternatives for HGD and IMC. The goal of endoscopic therapy for HGD or IMC is to ablateall BE epithelium (both dysplastic and non-dysplastic) due to risk of synchronous/metachronous lesion development in the remaining BE segment.

关键词： Barrett’s esophagus High-grade dysplasia Intramucosal carcinoma Esophagectomy Endoscopic mucosal resection Radiofrequency ablation Cryotherapy

A defect in the PINOID serine/threonine kinase affects leaf shape in cucumber

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2019年第9期61卷 966-967页

作者： jennifer Mach Peridot Scientific Communications

Examining the plants in any forest or meadow reveals a remarkable diversity of leaf shape,suggesting the importance of this trait for adaptation to various environmental conditions(reviewed in Nicotra et al.2011).Indeed,leaf shape may be constrained by biomechanical factors and affects thermoregulation,susceptibility to herbivory,the available light for photosynthesis,and water balance.

关键词： the PINOID serine/threonine kinase leaf shape in cucumber Examining

Evaluation of the plasmonic effect of Au and Ag on Ti-based photocatalysts in the reduction of CO2 to CH4

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2017年第2期26卷 277-283页

作者： Martin Dilla Anna Pougin jennifer Strunk Max-Planck-Institute for Chemical Energy conversion Stiftstraße 34-3645470 Mülheim/RuhrGermany Laboratory of Industrial Chemistry Ruhr-University BochumUniversitätsstraße 15044780 BochumGermany Center for Nanointegration Duisburg-Essen University of Duisburg-EssenCarl-Benz-Straße 19947057 DuisburgGermany

Crystalline TiO（P25） and isolated titanate species in a ZSM-5 structure（TS-1） were modified with Au and Ag, respectively, and tested in the gas-phase photocatalytic COreduction under high purity conditions. The noble metal modification was performed by photodeposition. Light absorbance properties of the catalysts are examined with UV–Vis spectroscopy before and after the activity test. In the gas-phase photocatalytic COreduction, it was observed that the catalysts with Ag nanostructures are more active than those with Au nanostructures. It is thus found that the energetic difference between the band gap energy of the semiconductor and the position of the plasmon is influencing the photocatalytic ***, plasmon excitation due to visible light absorption results in plasmon resonance energy, which affects the excitation of the semiconductor positively. Therefore, an overlap between band gap energy of the semiconductor and metal plasmon is needed.

关键词： Photocatalytic CO2 reduction Plasmon resonance Methane formation TS-1 P25 Noble metal photodeposition High-purity gas-phase photoreactor

The effect of gas phase polydimethylsiloxane surface treatment of metallic aluminum particles： Surface characterization and flow behavior

在线全文

学校读者我要写书评

暂无评论

Particuology 2017年第1期15卷 92-101页

作者： Bellamarie Ludwia jennifer L. Gray Applied Research Laboratory The Pennsylvania State University North Atherton Street State College PA 16801 USA Materials Research Institute The Pennsylvania State University USA

Aluminum particles were exposed to gaseous polydimethylsiloxane （PDMS） to produce a hydropho- bic surface coating for enhanced flow and fluidity. Surface retention of the intact PDMS was confirmed through infrared and X-ray photoelectron spectroscopy. Transmission electron microscopy was used to image cross-sections of the treated particles and energy dispersive spectroscopy element maps demon- strated the presence of a surface layer consisting of silicon and oxygen. Density measurements provided evidence for improvements in the Hausner ratio and Carr index of the PDMS-treated aluminum, indicating a reduction in inter-particulate cohesion through increased bulk density. Stability, compressibility, shear, aeration, and permeability of the particles were assessed by powder rheometer. The compressibility was reduced by approximately 32% following surface treatment, revealing a reduction in void space, while Mohr＇s circle analysis and shear testing determined that the extrapolated cohesion value was reduced by approximately 53% and the flow factor at 6 kPa was doubled. Aeration testing showed that the air velocity required to obtain a fluidized bed was on the order of 0.35 mm/s for the treated powder, whereas the raw powder could not be uniformly fluidized. PDMS may be a viable option for the large-scale treatment of aluminum powder for flow applications.

关键词： Aluminum powder Polydimethylsiloxane X-ray photoelectron spectroscopy Diffuse reflectance infrared Fourier transform spectroscopy Flowability FT4 powder rheometer