173 research outputs found
Le linge sale du président Mao [The Private Life of Chairman Mao, de Li Zhisui]
No full textFensterbank François. Le linge sale du président Mao [The Private Life of Chairman Mao, de Li Zhisui]. In: Perspectives chinoises, n°26, 1994. pp. 63-70
Le linge sale du président Mao [The Private Life of Chairman Mao, de Li Zhisui]
No full textFensterbank François. Le linge sale du président Mao [The Private Life of Chairman Mao, de Li Zhisui]. In: Perspectives chinoises, n°26, 1994. pp. 63-70
Operações e representações discursivas da enunciação da hipotese em tres linguas neolatinas
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e ExpressãoEste trabalho propõe uma análise sintática e semântica de enunciados hipotéticos eventuais recortados de textos escritos em português, espanhol e francês em condições e contextos reais de comunicação. O foco desta análise se baseia na perspectiva semântico - argumentativa, assim como em alguns elementos pragmáticos, textuais e discursivos da enunciação. As atitudes modalizadoras do sujeito enunciador por um lado, enquanto base semântica construída sobre os valores de certo obrigatório ou provável, e as operações de implicação correlativa ou inclusão, enquanto base de estruturação sintática, por outro, são os dois componentes lógicos que configuram o enunciado hipotético nas três línguas neolatinas estudadas
Thermomechanical cuttings cleaner – qualification for offshore treatment of oil contaminated cuttings on the norwegian continental shelf and martin linge case study
No full textThe aim of this thesis is to introduce and qualify the Thermomechanical Cuttings Cleaner (TCC) technology for treatment of oil contaminated cuttings on the Norwegian Continental Shelf (NCS) with particular reference to the Martin Linge field development.
In the first part, a summary of drilling waste, related regulation and waste management techniques is given to present the possible treatment and disposal options of oil contaminated cuttings.
The thesis then informs about the TCC technology in detail. In the next section the TCC’s treatment capacity and efficiency is verified by means of field data analysis. Both environmental considerations and TCC field experience are taken into account to qualify the TCC technology for use. In the last section the TCC cuttings treatment is compared to cuttings re-injection and skip & ship solution with the aim to find and implement the best cuttings treatment solution at the Martin Linge field.
In Conclusion, the thesis argues that the TCC technology qualifies for use on NCS and outlines it to be the best cuttings handling solution for the Martin Linge field development with regards to HSE-, cost and operation reliability considerations. The author recommends the implementation of the TCC technology as presented in the thesis
Interfacial “Single‐Atom‐in‐Defects” Catalysts Accelerating Li + Desolvation Kinetics for Long‐Lifespan Lithium‐Metal Batteries
No full textThe lithium-metal anode is a promising candidate for realizing high-energy-density batteries owing to its high capacity and low potential. However, several rate-limiting kinetic obstacles, such as the desolvation of Li+ solvation structure to liberate Li, Li nucleation, and atom diffusion, cause heterogeneous spatial Li-ion distribution and fractal plating morphology with dendrite formation, leading to low Coulombic efficiency and depressive electrochemical stability. Herein, differing from pore sieving effect or electrolyte engineering, atomic iron anchors to cation vacancy-rich Co embedded in 3D porous carbon (SAFe/CVRCS@3DPC) is proposed and demonstrated as catalytic kinetic promoters. Numerous free Li ions are electrocatalytically dissociated from the Li solvation complex structure for uniform lateral diffusion by reducing desolvation and diffusion barriers via SAFe/CVRCS@3DPC, realizing smooth dendrite-free Li morphologies, as comprehensively understood by combined in situ/ex situ characterizations. Encouraged by SAFe/CVRCS@3DPC catalytic promotor, the modified Li-metal anodes achieve smooth plating with a long lifespan (1600 h) and high Coulombic efficiency without any dendrite formation. Paired with the LiFePO cathode, the full cell (10.7 mg cm) stabilizes a capacity retention of 90.3% after 300 cycles at 0.5 C, signifying the feasibility of using interfacial catalysts for modulating Li behaviors toward practical applications
Interfacial “single‐atom‐in‐defects” catalysts accelerating Li+ desolvation kinetics for long‐lifespan lithium‐metal batteries
No full textThe lithium-metal anode is a promising candidate for realizing high-energy-density batteries owing to its high capacity and low potential. However, several rate-limiting kinetic obstacles, such as the desolvation of Li+ solvation structure to liberate Li+, Li0 nucleation, and atom diffusion, cause heterogeneous spatial Li-ion distribution and fractal plating morphology with dendrite formation, leading to low Coulombic efficiency and depressive electrochemical stability. Herein, differing from pore sieving effect or electrolyte engineering, atomic iron anchors to cation vacancy-rich Co1−xS embedded in 3D porous carbon (SAFe/CVRCS@3DPC) is proposed and demonstrated as catalytic kinetic promoters. Numerous free Li ions are electrocatalytically dissociated from the Li+ solvation complex structure for uniform lateral diffusion by reducing desolvation and diffusion barriers via SAFe/CVRCS@3DPC, realizing smooth dendrite-free Li morphologies, as comprehensively understood by combined in situ/ex situ characterizations. Encouraged by SAFe/CVRCS@3DPC catalytic promotor, the modified Li-metal anodes achieve smooth plating with a long lifespan (1600 h) and high Coulombic efficiency without any dendrite formation. Paired with the LiFePO4 cathode, the full cell (10.7 mg cm−2) stabilizes a capacity retention of 90.3% after 300 cycles at 0.5 C, signifying the feasibility of using interfacial catalysts for modulating Li behaviors toward practical applications
Regional income inequality in China and Indonesia: A comparative analysis
No full textThis study examines the extent and trends of regional income inequality in China and Indonesia, and performs a comparative analysis between these two countries in terms of factors determining regional income inequality. There are a number of studies that have analyzed the relationship between economic development and regional income inequality in China and Indonesia. However, most previous studies employed provincial income and population data to measure regional income inequality and were thus unable to measure inequality within provinces. In order to rectify this drawback, we will use district-level income and population data, rather than provincial data, to measure regional income inequality, and examine not only between-province inequalities but also within-province inequalities by using the two-stage nested Theil decomposition method developed by Akita (2002). China and Indonesia are still at a relatively early stage of economic development; therefore, income-enhancing economic activities tend to have concentrated in a few districts in each province to enjoy agglomeration economies. We will show that a very large regional income inequality exists among the districts of China and Indonesia. This study will also conduct a regression analysis to explore possible determinants of within-province income inequality, in which the following variables are considered: foreign direct investment, economic dualism, and migration.
Iron oxide nanoparticles as carriers for the Dy-166/Ho-166 in vivo generator: A study into the characteristics and retention of Dy and Ho in iron oxide nanoparticles
No full textBackground:Cancer is one of the leading causes of death worldwide. Targeted radionuclide therapy has become a important treatment, this is when a carrier molecule is attached to a radionuclide to deliver cytotoxic radiation levels to diseased cells. β− emitters are frequently used in RNT because they have a long penetration depth, such as the dysprosium-166/holmium-166 (166Dy/166Ho) in vivo generator. The 166Dy/166Ho in vivo generator shows great potential for large tumors because of the long half-life time of the mother nuclide 166Dy and the emission of high energy β− from the daughter nuclide 166Ho. Previous research shows the release of 72 % of the 166Ho when 166Ho is bound to conventional chelators due to internal conversion after the β− decay. The aim of this thesis is to synthesize an iron oxide nanoparticle as carrier for the 166Dy/166Ho in vivo generator. This iron oxide nanoparticles (SPIONs) should prevent internal conversion and thus the loss of the daughter nuclide 166Ho.Results:The dysprosium doped iron oxide nanoparticles were synthesized successfully with an average diameter of 6.1 ± 1.5 nm, measured with TEM. The DLS and TEM results showed that the SPIONs were aggregating. The labeling efficiency represents how much Dy is retained in the Dy doped SPIONs, for the non-radioactive Dy this was measured with the ICP/OES. The labelling efficiency was 3.21 ± 0.8 %. The 166Dy doped iron oxide nanoparticles were also synthesized successfully with a radiolabelling efficiency of 3.12 ± 2.2 %, measured with a 2480 Wizard 2 Gamma counter. The retention of 166Dy + 166Ho was 79.2 ± 1.8 % after 96 h.Conclusion:The retention of 166Dy + 166Ho in iron oxide nanoparticles was 79.2±1.8 % after 96 hours. This is much higher than the retention of 28% by conventional chelators. This means that the iron oxide nanoparticls is a safer carrier for the 166Dy/166Ho in vivo generator than the conventional chelator.Applied Physic
Superior Li<sup>+</sup> Kinetics by “Low-Activity-Solvent” Engineering for Stable Lithium Metal Batteries
No full textThe
structure of solvated Li+ has a significant influence
on the electrolyte/electrode interphase (EEI) components and desolvation
energy barrier, which are two key factors in determining the Li+ diffusion kinetics in lithium metal batteries. Herein, the
“solvent activity” concept is proposed to quantitatively
describe the correlation between the electrolyte elements and the
structure of solvated Li+. Through fitting the correlation
of the electrode potential and solvent concentration, we suggest a
“low-activity-solvent” electrolyte (LASE) system for
deriving a stable inorganic-rich EEI. Nano LiF particles, as a model,
were used to capture free solvent molecules for the formation of a
LASE system. This advanced LASE not only exhibits outstanding antidendrite
growth behavior but also delivers an impressive performance in Li/LiNi0.8Co0.1Mn0.1O2 cells (a capacity
of 169 mAh g–1 after 250 cycles at 0.5 C)
Tailoring Electrolyte Solvation for LiF-Rich Solid Electrolyte Interphase toward a Stable Li Anode
No full textA solid
electrolyte interphase (SEI) with robust mechanical property
and high ionic conductivity is imperative for high-performance lithium
metal batteries since it can efficiently impede the growth of notorious
lithium dendrites. However, it is difficult to form such a SEI directly
from an electrolyte. In this work, a crowding dilutant modified ionic
liquid electrolyte (M-ILE) has been developed for this purpose. Simulations
and experiments indicate that the 1,2-difluorobenzene (1,2-dfBen)
dilutant not only creates a crowded electrolyte environment to promote
the interaction of Li+–FSI–, leading
to abundant aggregate ion pairs (AGGs), but also participates in the
reduction to construct a robust and high ionic-conductive SEI. With
this M-ILE, Li/LiFePO4 cells achieve a capacity retention
of 96% over 250 cycles with 9.5 mg cm–2 mass loading,
and Li/LiNi0.5Co0.2Mn0.3O2 cells also deliver a discharge capacity of 132 mAh g–1 with a high retention of 88% after 100 cycles. Therefore, the use
of a crowding diluent is considered to be an efficient way to construct
an advanced SEI for a Li anode
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