8,400 research outputs found
Clues, flow channels, and cognitive states: an exploratory study of customer experiences with e-brokerage services
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A design for Six Sigma case study: creating an IT change management system for a mid-size accounting firm
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Carbon isotopic composition and its implications on paleoclimate of the underground ancient forest ecosystem in Sihui, Guangdong
No full textWe present the carbon isotopic composition of the total organic carbon (TOC) and fine roots in the sedimentary profile from the underground ancient forest in Sihui to study the climatic and environmental changes from 4.5 ka BP to 0.6 ka BP. Results show that C(3) plant was the main vegetation from 4.5 ka BP to 0.6 ka BP in this region. The ancient forest began to develop in the wetland at around 4 ka BP and disappeared together with the wetland at about 3.0 ka BP, implying that the climate had changed greatly at around 3.0 ka BP. As indicated by the simulation results, the content of atmospheric CO(2) increased slightly during 3.5 ka BP to 3.0 ka BP, implying climate warming during that period. The interval of radiocarbon age between 3.0 ka BP to 1.2 ka BP was possibly caused by the strong erosion when the block was lifted in the neotectonic movement. From 1.2 ka BP to 0.6 ka BP, the region remained in terrestrial sedimentary environment, and the surface plant biomass declined gradually. Drought caused by the climate change was the likely cause for the disappearance of the ancient forest. South transition of Intertropical Convergence Zone (ITCZ) was probably the main mechanism for the climate change.Geosciences, MultidisciplinarySCI(E)EI3ARTICLE5638-6465
AMS measurements of Be-10 and C-14 in loess profile at Donglingshan, Beijing
No full textA loess profile in Donglingshan site (40 degrees 02'N, 115 degrees 27'E) near Beijing was chosen to study the loess formation process and paleo-climate variation. Thirty eight samples were collected and analyzed for C-14, Be-10 as well as MS. TOC and delta C-13. Based on C-14 measurements, we established a time scale for this loess profile during Holocene. The averaged Be-10 deposition flux was found to be 4.87 x 10(6) atoms/cm(2) year. This is similar to the flux of 4.2 x 10(6) atoms/cm(2) year estimated for Chinese Loess Plateau in central China. High Be-10 concentrations of 3.85-5.66 x 10(8) atoms/g for the samples in layer 23-39 cm from 2965 to 528 years BP suggest a warm and humid weather during this period. MS values have similar variation with Be-10 and reflect the similar paleo-climate information. TOC and delta C-13 suggest that the vegetation around Donlingshan area was C-3 type plants during entire Holocene. (C) 2009 Elsevier B.V. All rights reserved.Instruments & InstrumentationNuclear Science & TechnologyPhysics, Atomic, Molecular & ChemicalPhysics, NuclearSCI(E)EICPCI-S(ISTP)
Introduction to the special section on cocreating the customer service experience with high tech and high touch
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Carbon isotopic composition, turnover and origins of soil CO2 in a monsoon evergreen broadleaf forest in the Dinghushan Biosphere Reservoir, South China
No full textCarbon isotopic compositions of soil CO2 in rainy season (July) from two natural soil profiles (DHLS & DHS) in the monsoon evergreen broadleaf forest in the Dinghushan Biosphere Reservoir (DBR), South China, are presented. Turnover and origins of soil CO2 are preliminarily discussed in this paper. Results show that the content of soil CO2 varies between 6120 and 18718 ppmv, and increases with increasing depth until 75 cm, and then it declines. In DHLS, soil CO2 delta C-13 ranges from -24.71aEuro degrees to -24.03aEuro degrees, showing a significant inverse correlation (R (2)=0.91) with the soil CO2 content in the same layer. According to a model related to soil CO2 delta C-13, the soil CO2 is mainly derived from the root respiration (> 80%) in DHLS. While in DHS, where soil CO2 delta C-13 ranges from -25.19aEuro degrees to -22.82aEuro degrees, soil CO2 is primarily originated from the decomposition of organic matter (51%-94%), excluding the surface layer (20 cm, 90%). Radiocarbon data suggest that the carbon in soil CO2 is modern carbon in both DHLS and DHS. Differences in C-14 ages between the "oldest" and "youngest" soil CO2 in DHLS and DHS are 8 months and 14 months, respectively, indicating that soil CO2 in DHLS has a faster turnover rate than that in DHS. The Delta C-14 values of soil CO2, which range between 100.0aEuro degrees and 107.2aEuro degrees and between 102.5aEuro degrees and 112.1aEuro degrees in DHLS and DHS, respectively, are obviously higher than those of current atmospheric CO2 and SOC in the same layer, suggesting that soil CO2 is likely an important reservoir for Bomb-C-14 in the atmosphere.Multidisciplinary SciencesSCI(E)1ARTICLE232548-25565
Author Correction: A Satellite Imagery Dataset for Long-Term Sustainable Development in United States Cities
No full textCorrection to: Scientific Data, published online 04 December 2023 In this article the author name Jingtao Ding was incorrectly written as Jintao Ding. The original article has been corrected.</p
Ding: the life of Jay Norwood Darling
No full textThis is the bibliographic record of the book entitled Ding: the Life of Jay Norwood Darling that is in the NCTC Conservation Library collection. Bibliographic record: Personal Author: Lendt, David L. Title: Ding : the life of Jay Norwood Darling Edition: Iowa heritage collection ed. Publication info: Ames : Iowa State University Press, 1989, c1979. xi, 204 p., [60] p. of plates :NC ill. ; 22 cm. Series Title: (Iowa heritage collection
La dynamique de l´Art Ding Nzumguba Ibio
No full textnuloO trabalho trata de manifestações artísticas entre os Ding do Zaire, propondo contribuir para a tomada de consciência da natureza da arte negro-africana em geral através do caso particular desse complexo cultural. Situando o meio natural e social onde aflora a arte Ding, o autor realça o caráter de múltiplos significados de que se reveste, como proposta funcional, simbólica, mágico-religiosa e estética. Abordando vários aspectos da arte Ding (arquitetura, tecelagem, "poterie", escultura) o autor realça o papel do artista que, ao trabalhar com um fenômeno que não se configura como "arte pela arte", aparece essencialmente como símbolo da unidade, da concórdia e da paz comunitária.The Project examines the artistic manifestations among those of Ding of Zaire, proposing to talk the natural conscience of Black-African Art general through a particular case of this cultural complex. Citing a way natural and social where emerges the Ding Art, the author emphasizes the character of multiple meanings in with it has, like functional proposal, symbolic, magic religious, aesthetics. Examining various aspects of Ding Art (architecture, textile, ‘potterie’, sculpture) the author emphasizes the role of the artist who, to work a phenomena which doesn’t form itself “art of arts”, essentially appears like a symbol of unity, compromise and community peace
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