294 research outputs found
Peer review report 2 on âAssessment of changes in riverine nitrate in the Sesan, Srepok and Sekong tributaries of the Lower Mekong River Basinâ
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On the Emancipation of the Lower Orders by the Yung-chêng Emperor
Get PDFIn the early period of the Ch'ing (清) dynasty, there lived several kinds of persons of inferior social status, called Yueh-hu (樂戶), To-min (墮民), Kai-hu (丐戶), Chiu-hsing-yu-hu (九姓漁戶), Tan-hu (蜑戶), Liao-min (寮民), P'eng-min (棚民), Pang-tang (伴儅) and Shih-p'u (世僕). One of the most important policies of the Yung-cheng emperor was their emancipation. The author tries to uncover the details of these reforms
Turn-to-Turn Contact Resistance Measurement of NI REBCO Double Pancake Coils
Get PDFThe turn-to-turn contact resistance/resistivity is one of the most important parameters for no-insulation (NI) rare-earth barium copper oxide (REBCO) pancake coils. Our group has been working on the measurement of the contact resistances of NI REBCO pancake coils by alternating current, called a low-frequency ac current (LFAC) method. One of the advantages is that the LFAC method is able to measure the field and current dependencies on contact resistances in principle, while the conventional discharge method is not. The effectiveness of the LFAC method was well demonstrated using a single pancake coil. In this paper, contact resistances of a double pancake coil were measured with the LFAC method although the upper and lower pancake coils had different turn-to-turn contact conditions due to an accident. The experiment results well agree with the simulation results. In addition, the contact resistances of each pancake coil can be separately specified. The contact resistances measured with a conventional sudden discharge method also have a good agreement with the LFAC method; however, the contact resistance of sudden discharge simulation is underestimated. Meanwhile, the energy consumptions are also complicated. We need further investigation for multi-stacked NI pancake coils in the near future
A stability result for elliptic equations with singular nonlinearity and its applications to homogenization problems
No full textWe consider model semilinear elliptic equations of the type { -div(A(x)∇u)=σu^-λ , u>0 in Ω, u ∈ Ho(Ω) }, where Ω is a bounded domain in {RN}, N≧1, A∈{L∞}(Ω)^(NxN) is a coercive matrix, 0<λ≦1 and σ is a nonnegative function in L1loc(Ω), or more generally, nonnegative Radon measure on Ω. We discuss Ho(Ω)-stability of u under a minimal assumption on σ and apply the result to homogenization problems
On the Agricultural Economy of the Suchou Plain under Ming
Get PDFFrom ancient times the alluvial plain of Suchou (蘇州) was one of the key areas in the economic history of China. Though no change in this situation took place under Ming, i.e., the economic importance of the area remained intact, the economic structure underwent a big transformation due to (1) heavy taxation and (2) the development of money economy caused by the influx of silver through silk trade. In the present article the author takes up the problem how the traditional pure husbandry was replaced by a new mixed form of agriculture, sericulture and cotton growing, and describes the process where the latter was becoming more and more important in the economy of the area. In the Ming period, especially in its middle and latter parts, the agrarian communities in Suchou became not only supplied with agricultural implements and fertilizers from outside but part of the larger money or exchange economy
The Ma 馬 Clan of Tong-zhou 同州, Shang-xi 陜西
Get PDFThis paper is a case study devoted to the problem of the local gentry. Utilizing the Guan-xi Ma-shi shi-xing-lu 關西馬氏世行錄 as a principal source, the author pursues the genealogy of the Ma clan of Tong-zhou, Shan-xi -- which produced the Ming Grand Secretary Ma Zi-qiang 馬自強 (1513-1578) -- and the activities of the clansmen over a period of four to five hundred years, from early Ming to late Qing. He concludes that nearly all the people who appear in the Shi-xing-lu were degree-holders (sheng-yuan 生員, ju-ren 舉人, or jin-shi 進士), and that with the exception of those clansmen who spent their entire lives in the imperial bureaucracy, all of the ones who were either retired from office and living in the countryside or still on active service were mainly preoccupied with agriculture and acted as landlords, moneylenders, merchants, and teachers in private academies. Furthermore, it is argued, the Ma clansmen were political, economic, and cultural leaders in the Tong-zhou area, and throughout the whole span of the Ming-Qing era their mode of life and their relations with village society remained virtually unchanged
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