2,245 research outputs found
Dataset for the paper "Climate model bias indicates higher projected future temperature extremes"
No full text<div>
<div>This repository holds data and scripts used to produce the paper entitled:</div>
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<div>"Climate model bias indicates higher projected future temperature extremes"</div>
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<div>by Lei Duan, Lyssa M. Freese, Govindasamy Bala, and Ken Caldeira.</div>
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<div>The paper is currently submitted for peer review.</div>
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<div>Any questions regarding the data and paper could be sent to the corresponding author: Lei Duan ([email protected])</div>
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Fig. 5. Linear correlation between the experimental and calculated 13C NMR chemical shifts for 1A and 1B in (±)-hyperzewalsins A D, four pairs of nor-monocyclic polyprenylated acylphloroglucinols with immunosuppressive activity from hypericum przewalskii maxim
No full textFig. 5. Linear correlation between the experimental and calculated 13C NMR chemical shifts for 1A and 1B.Published as part of Duan, Yulin, Bu, Pengfei, Xie, Shuangshuang, Guo, Yi, Shi, Zhengyi, Qi, Changxing & Zhang, Yonghui, 2021, (±)-hyperzewalsins A D, four pairs of nor-monocyclic polyprenylated acylphloroglucinols with immunosuppressive activity from hypericum przewalskii maxim, pp. 1-9 in Phytochemistry (112779) 187 on page 5, DOI: 10.1016/j.phytochem.2021.112779, http://zenodo.org/record/825877
Fig. 6 in (±)-hyperzewalsins A D, four pairs of nor-monocyclic polyprenylated acylphloroglucinols with immunosuppressive activity from hypericum przewalskii maxim
No full textFig. 6. Experimental ECD spectra (in MeOH) of 1a/1b–4a/4b.Published as part of Duan, Yulin, Bu, Pengfei, Xie, Shuangshuang, Guo, Yi, Shi, Zhengyi, Qi, Changxing & Zhang, Yonghui, 2021, (±)-hyperzewalsins A D, four pairs of nor-monocyclic polyprenylated acylphloroglucinols with immunosuppressive activity from hypericum przewalskii maxim, pp. 1-9 in Phytochemistry (112779) 187 on page 5, DOI: 10.1016/j.phytochem.2021.112779, http://zenodo.org/record/825877
Improved quantitative risk assessment of a natural gas pipeline considering high-consequence areas
No full textCurrently, quantitative risk assessment is often used for pipeline safety analysis. However, the low probability of pipeline failure may produce a false safety evaluation result because high-consequence areas with high population densities cannot be effectively identified. Furthermore, nearly half of the gas leakage accidents in China have occurred in densely populated areas. Therefore, an improved quantitative risk assessment method is proposed. First, we establish two models: (1) a failure probability model based on improved historical failure and disaster derivation probabilities and (2) a risk consequence model considering potential direct and indirect losses based on the probability of disaster evolution. Considering the concept of human rights equality and the social model of "life is first" in China, a method to correct the loss value of life according to population density is proposed, which can effectively avoid the hidden phenomenon of high-consequence areas mentioned above. A pipeline in China is evaluated using this improved method. Compared with traditional evaluation results, the new evaluation method can effectively identify a high-consequence area and obtain more reasonable results. Thus, a pipeline maintenance plan can ensure the interests of enterprises and fully respect the lives of individuals threatened by the potential risk of the pipeline
Transformable Plasmonic Helix with Swinging Gold Nanoparticles
No full textControl over multiple optical elements that can be dynamically rearranged to yield substantial three-dimensional structural transformations is of great importance to realize reconfigurable plasmonic nanoarchitectures with sensitive and distinct optical feedback. In this work, we demonstrate a transformable plasmonic helix system, in which multiple gold nanoparticles (AuNPs) can be directly transported by DNA swingarms to target positions without undergoing consecutive stepwise movements. The swingarms allow for programmable AuNP translocations in large leaps within plasmonic nanoarchitectures, giving rise to tailored circular dichroism spectra. Our work provides an instructive bottom-up solution to building complex dynamic plasmonic systems, which can exhibit prominent optical responses through cooperative rearrangements of the constituent optical elements with high fidelity and programmability
Changes in the Responsiveness of the Hypothalamic-Pituitary-Gonadal Axis to Kisspeptin-10 Administration during Pubertal Transition in Boys
No full textIn human, no studies are available regarding changes in kisspeptin1 receptor (KISS1R) sensitivity during pubertal transition. In this study, healthy boys were classified into 5 Tanner stages of puberty (n=5/stage). Human kisspeptin-10 was administered to boys at each Tanner stage and to adult men (n=5) as an IV bolus for comparison. Serial blood samples were collected for 30 min pre- and 120 min post-kisspeptin injection periods at 30 min interval for measuring plasma LH and testosterone levels. There was insignificant effect of kisspeptin on LH and testosterone levels in boys of Tanner stages I–III. At Tanner stage IV, the effect of kisspeptin on plasma LH was insignificant. However, a paired t-test on a log-transformed data showed a significant (P<0.05) increase in mean peak post-kisspeptin testosterone level. In Tanner stage V, a significant (P<0.05) increase was observed in mean post-kisspeptin peak LH level as compared to the mean basal LH value. Post-kisspeptin plasma testosterone levels were also significantly (P<0.05) increased as compared to the pre-kisspeptin level in Tanner stage V. Our data suggest that sensitivity of KISS1R on GnRH neurons with reference to LH stimulation in boys develops during the later part of puberty reaching to adult level at Tanner stage V. This trial is registered with WHO International Clinical Trial Registration ID NCT03286517
Analysis of the conform process: a specific form of aluminium extrusion.
No full textSince the Conform process was patented 30 years ago, there have only been approximately 200 machines sold worldwide. Given that Conform competes economically with conventional extrusion and is also reported to be a more energy
efficient process, it is surprising that the use of Conform is not more widespread in today's increasingly environmentally conscious and high-production focussed world. One explanation for this is likely to be due to the fact that there is still limited knowledge of the thermo-mechanical behaviour of the workpiece during extrusion.
Furthermore, for the aluminium industry, there are still issues remaining regarding the production of flash and the quality of the extrudate in terms of mechanical properties. This study provides the reader with the findings of the research and experimental work undertaken by the author, his co-workers and fellow specialists, in the field of aluminium extrusion including Conform. The experimental work includes both laboratory experiments performed with a direct extrusion press and an experimental machine set up to replicate the Conform process. The experimental work is also simulated using finite element modelling techniques. The results from these analyses are then validated by comparing industrial and experimental data. The finite element analyses are enhanced by using parallel processing technology and user sub-routines. The author proposes new models to allow for the study of the different sub-processes in Conform. These include the coining of the feedstock, formation of the upset zone, extrusion of the flash, the filling-up of the expansion chamber / feeder plate and the extrusion of the extrudate. The author also investigates methods which predict microstructure and surface cracks in the extrudate. The author suggests innovative techniques to improve the efficiency of finite element analysis in metal forming. Finally the author recommends procedures for the study of structural integrity and the optimisation of the tooling used in Conform
TAXONOMIC REVISION OF THE FERN GENUS CTENITIS (DRYOPTERIDACEAE) FROM AFRICA AND THE WESTERN INDIAN OCEAN
No full textA taxonomic revision of Ctenitis (C. Chr.) C. Chr. (Dryopteridaceae) from Africa and the Western Indian Ocean was carried out. Forty species are recognized, of which 12 are described as new, eight are transferred to Ctenitis from other genera, and one is elevated from variety to species and transferred from Aspidium Sw. to Ctenitis. These 21 nomenclatural novelties include C. analamazaotrensis (Rakotondr.) Hennequin & Rouhan (comb. nov.), C. brevipetiolulata Li Bing Zhang & Yi F. Duan (sp. nov.), C. bullescens Rouhan, Li Bing Zhang & Yi F. Duan (sp. nov.), C. cerea Li Bing Zhang & Yi F. Duan (sp. nov.), C. comorensis Li Bing Zhang & Yi F. Duan (sp. nov.), C. crinigera (C. Chr.) Hennequin & Rouhan (comb. nov.), C. decaryana (C. Chr.) Hennequin & Rouhan (comb. nov.), C dentata Li Bing Zhang & Yi F. Duan (sp. nov.), C. fibrillosa (Baker) Li Bing Zhang & Yi F. Duan (comb. nov.), C. hispida (Kuhn) Li Bing Zhang & Yi F. Duan (comb. & stat. nov.), C. jouyana (Rakotondr.) Hennequin & Rouhan (comb. nov.), C. longivillosa Li Bing Zhang & Yi F. Duan (sp. nov.), C. marginalisora Li Bing Zhang & Yi F. Duan (sp. nov.), C mayottensis Li Bing Zhang & Yi F. Duan (sp. nov.), C. multilobata Li Bing Zhang, Yi F. Duan & Rouhan (sp. nov.), C. reunionensis Hennequin, Li Bing Zhang & Yi F. Duan (sp. nov.), C. sieberiana (Kaulf.) Hennequin & Rouhan (comb. nov.), C sparsa Li Bing Zhang & Yi F. Duan (sp. nov.), C. spekei (Baker) Li Bing Zhang & Yi F. Duan (comb. nov.), C. subcrenulata (Baker) Li Bing Zhang, Rouhan & Yi F. Duan (comb. nov.), and C tardieu-blotiae Li Bing Zhang & Yi F. Duan (sp. nov.). A key to these species is provided; all species are described and illustrated; and information on their distribution and habitats is given. Twenty-three relevant species reported in the literature are excluded from the flora, and their taxonomy, distribution, and nomenclature are discussed. Seventeen related names are lectotypified or neotypified including Aspidium cirrhosum Schumach., A. crinitum (Poir.) Wall. var. hispida Kuhn, A. cyclochlamys Fee, A. nitidum Bory ex Willd., A. pauciflorum Kaulf., A. sulcatum Kaulf. ex Bory, C. anjenabensis Tardieu, Dryopteris blepharochlamys C. Chr., Gymnogramma subsimilis Hook., Nephrodium crinitum (Poir.) Desv. var. maritimum Cordem, N.. magnum Baker, N. spekei Baker, N. welwitschii Baker, Phegopteris biformis Mett. ex Kuhn, P. bivestita Mett., Polypodium baronii Baker, and P. efulense Baker; type information of related 262 names is also given
Highlights of the Chinese exposure factors handbook (adults) /
No full textThe Chinese Research Academy of Environmental Sciences (CRAES) has conducted the Environmental exposure related activity pattern research of Chinese population (Adults). Exposure Factors Handbook of Chinese Population (Adults) was compiled based on the results from this study. Highlights of the Chinese Exposure Factors Handbook is a brief introduction to the content of Exposure Factors Handbook of Chinese Population (Adults). In each chapter, definitions, possible influence factors, and survey methods have been introduced, followed by recommended values for urban/rural areas, different genders, age groups and regions with information of mean, median and P5, P25, P75, P95 values. With the abundant data and tables, readers are provided with an accessible and comprehensive overview of Chinese exposure factors.Includes bibliographical references.Vendor-supplied metadata.The Chinese Research Academy of Environmental Sciences (CRAES) has conducted the Environmental exposure related activity pattern research of Chinese population (Adults). Exposure Factors Handbook of Chinese Population (Adults) was compiled based on the results from this study. Highlights of the Chinese Exposure Factors Handbook is a brief introduction to the content of Exposure Factors Handbook of Chinese Population (Adults). In each chapter, definitions, possible influence factors, and survey methods have been introduced, followed by recommended values for urban/rural areas, different genders, age groups and regions with information of mean, median and P5, P25, P75, P95 values. With the abundant data and tables, readers are provided with an accessible and comprehensive overview of Chinese exposure factors.Front Cover -- Highlights of the Chinese Exposure Factors Handbook (Adults) -- Copyright Page -- Contents -- Preface -- Foreword -- Synopsis -- List of Tables -- 1 Introduction -- 1.1 Background and purpose -- 1.2 Targeted exposure factors -- 1.3 The approach to developing recommended values of exposure factors -- 1.4 Uncertainty and variability -- 1.5 Limitation and further research needs -- 2 Inhalation Rates -- 2.1 Introduction -- 2.2 Recommended values -- 3 Water Ingestion Rates -- 3.1 Introduction -- 3.2 Recommended values -- 4 Food Intake4.1 Introduction4.2 Recommended values -- 5 Time-Activity Factors Related to Air Exposure -- 5.1 Introduction -- 5.2 Recommended values -- 6 Time-Activity Factors Related to Water Exposure -- 6.1 Introduction -- 6.2 Recommended values -- 7 Time-Activity Factors Related to Soil Exposure -- 7.1 Introduction -- 7.2 Recommended values -- 8 Time-Activity Factors Related to Electromagnetic Exposure -- 8.1 Introduction -- 8.2 Recommended values -- 9 Body Weight -- 9.1 Introduction -- 9.2 Recommended values -- 10 Body Surface Area -- 10.1 Introduction10.2 Recommended values11 Life Expectancy -- 11.1 Introduction -- 11.2 Recommended values -- 12 Residential Factors -- 12.1 Introduction -- 12.2 Recommended values -- References -- AcknowledgmentsElsevie
Effective detection of security compromises in enterprises using feature engineering
No full textThe student, Jiayi Duan, submitted this Thesis for approval on 2016-12-07 at 23:45.This Thesis was approved for publication on 2016-12-08 at 09:38.DSpace SAF Submission Ingestion Package generated from Vireo submission #10478 on 2017-02-28 at 14:43:24Made available in DSpace on 2017-03-01T17:02:07Z (GMT). No. of bitstreams: 2
DUAN-THESIS-2016.pdf: 1112146 bytes, checksum: d77746635b466f3808926f8232c490a0 (MD5)
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Previous issue date: 2016-12-08Embargo set by: Seth Robbins for item 98738
Lift date: 2019-03-01T17:02:22Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98738
Lift date: 2019-03-01T17:03:32Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98738
Lift date: 2019-03-01T17:05:02Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system"We present a method to effectively detect malicious activity in the data of enterprise logs. Our method involves feature engineering, or generating new features by applying operators on the features of the raw data. We apply the Fourier expansion of Boolean functions to generate parity functions on feature subsets, or parity features. We also investigate a heuristic method of applying Boolean operators to raw data features, generating propositional features. We demonstrate with real data sets that the engineered features enhance the performance of classifiers and clustering algorithms. As compared to classification of raw data features, the engineered features achieve up to 50.6% improvement in malicious recall while sacrificing no more than 0.47% in accuracy. Clustering with respect to the engineered features finds up to 6 ""pure"" malicious clusters, as compared to 0 ""pure"" clusters with raw data features. In one case, exactly one (1) engineered feature could achieve higher performance than 91 raw data features. In general, a small number (<10) of engineered features achieve higher performance than raw data features."Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2018-12-01The student, Jiayi Duan, accepted the attached license on 2016-12-07 at 23:36.Embargo set by: Seth Robbins for item 98738
Lift date: 2019-03-01T17:06:55Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 98738 on 2019-03-02T10:15:30Z
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