Slope stability along active and passive continental margins: a geotechnical approach

Submarine mass movements are widespread at submarine slopes and play an important role in transporting sediments across the continental slope to the deep basin, as well as potential danger to both offshore infrastructures (e.g., pipeline, cables and platforms) and coastal areas (e.g., slope failure-induced tsunamis). Sliding of the sediments on continental slope takes place when the shear stress within sediments exceeds the shear strength thereby causing slope failure. Slope failures are generally controlled by long-term preconditioning factors (e.g., high sedimentation rate, weak layer and oversteepening) and short-term triggering mechanisms (e.g., earthquake, anthropogenic activity). However, the exact causes for the different slope failure styles are still poorly understood. In summary, this thesis investigates preconditioning factors and triggering mechanisms governing slope instabilities of three distinct submarine landslides areas in passive and active continental margin settings. Geotechnical properties of sediments from undeformed, headwall and deposits present different stress histories and shear strengths (undrained and drained shear strength). Geotechnical results are used for infinite slope stability of undeformed sediments under various conditions (undrained and drained, each static and earthquake conditions) to identify the preconditioning factors and quantify the influence of earthquakes as a key factor in slope failing mechanisms. The three distinct case studies are located at: (1) the passive continental slope of Uruguay and north of Argentina, (2) the low seismic and tectonically active Gela foreland basin, central Mediterranean continental margin, and (3) the moderate seismic and tectonically active back-arc basin, deeper slope of the Ligurian margin, Southern France

Quasi-two-body decays B→DK∗(892)→DKπB \to D K^*(892) \to D K \pi in the perturbative QCD approach

We study the quasi-two-body decays $B\to D K^*(892) \to D K\pi$ by employing the perturbative QCD approach. The two-meson distribution amplitudes \Phi_{K\pi}^{\text{P-wave}} are adopted to describe the final state interactions of the kaon-pion pair in the resonance region. The resonance line shape for the $P$-wave $K\pi$ component $K^*(892)$ in the time-like form factor $F_{K\pi}(s)$ is parameterized by the relativistic Breit-Wigner function. For most considered decay modes, the theoretical predictions for their branching ratios are consistent with currently available experimental measurements within errors. We also disscuss some ratios of the branching fractions of the concerned decay processes. More precise data from LHCb and Belle-II are expected to test our predictions.Comment: 10 pages, 3 figures and 2 tables.To be published in EPJ

A History of the Education of the Chinese in Hawaii

In the transplanting of any race or people, a period of acclimatization by the process of natural or formal education must inevitably ensue if that group wishes to survive both mentally and spiritually; and in many cases physically. In any community a human, in order to make himself agreeable and useful, must learn to cooperate with his or hers neighbors. This is usually accomplished by first learning the language of one\u27s country of adoption, then to learn the philosophy of the inhabitants already established there, and finally to apply one\u27s self diligently by industry and perseverance to occupation. The Chinese in Hawaii have shown their ability in adapting themselves to American ways and learning, and have succeeded in making themselves amongst the most powerful and progressive forces in the educational and economic life of the Islands. Since economic development is a factor which influences the educational opportunities of the state, this thesis will attempt to treat the progress of the Chinese in industry, commerce and the professions in their relation to the cultural and educational progress which is co-relative to the former

A History of the Education of the Chinese in Hawaii

In the transplanting of any race or people, a period of acclimatization by the process of natural or formal education must inevitably ensue if that group wishes to survive both mentally and spiritually; and in many cases physically. In any community a human, in order to make himself agreeable and useful, must learn to cooperate with his or hers neighbors. This is usually accomplished by first learning the language of one\u27s country of adoption, then to learn the philosophy of the inhabitants already established there, and finally to apply one\u27s self diligently by industry and perseverance to occupation. The Chinese in Hawaii have shown their ability in adapting themselves to American ways and learning, and have succeeded in making themselves amongst the most powerful and progressive forces in the educational and economic life of the Islands. Since economic development is a factor which influences the educational opportunities of the state, this thesis will attempt to treat the progress of the Chinese in industry, commerce and the professions in their relation to the cultural and educational progress which is co-relative to the former

Combined analysis of the γn→K0Σ0\gamma n \to K^0\Sigma^0 and γn→K+Σ−\gamma n \to K^+\Sigma^- reactions

The recently released data on differential cross sections for $\gamma n \to K^0\Sigma^0$ from the A2 and BGOOD Collaborations are used to examine the theoretical model constructed in our previous work [Phys. Rev. D \textbf{105}, 094017 (2022)] for $\gamma n \to K^+\Sigma^-$, and it is found that the model predictions are able to qualitatively reproduce the A2 data but fail to describe the BGOOD data. Then, a combined analysis of the $\gamma n \to K^0\Sigma^0$ and $\gamma n \to K^+\Sigma^-$ reactions is performed to revise the theoretical model. Due to the inconsistency problem, the A2 and BGOOD data are included in fits separately. In the case of including the A2 data, both the data for $\gamma n \to K^0\Sigma^0$ and $\gamma n \to K^+\Sigma^-$ can be fairly well described, and the contributions from the $N(1710)1/2^+$, $N(1880)1/2^+$, $N(1900)3/2^+$, and $\Delta(1920)3/2^+$ resonances are found to dominate the reactions in the lower energy region. While in the case of including the BGOOD data, although most of the data for the $\gamma n \to K^+ \Sigma^-$ reaction can be described with the exception of some noticeable discrepancies on beam asymmetries at lower energies, the BGOOD data for $\gamma n \to K^0\Sigma^0$ can be only qualitatively described, and the contributions from the $N(1710)1/2^+$, $N(1900)3/2^+$, and $\Delta(1910)1/2^+$ resonances are found to dominate the reactions in the lower energy region. In both cases, the $t$-channel $K^\ast(892)$ exchange is found to play a crucial role at forward angles in the higher energy region. Further precise measurements of data for $\gamma n \to K^0\Sigma^0$ are called on to disentangle the discrepancies between the data sets from the A2 and BGOOD Collaborations.Comment: 14 pages,17 figures; Accepted for publication in Physical Review