‘I want to take risks,like my mother’: Memory,affect, and Vietnamese masculinities – the legacy of gendered variations in socio-economic mobility during Ðổi mới     

Philip Martin 《Norsk geografisk tidsskrift. Norwegian journal of geography》2013,67(4):210-218

Young Vietnamese men who witnessed their mother's changing economic and labour market situations through the early years of Ð?i m?i (the policy of economic liberalization in Vietnam after 1986) have developed conceptions of masculinity that are ambivalent to notions of male power and authority within what is often termed the ‘traditional’ neo-Confucian family. On the basis of the life narratives of a small group of men in their early twenties, the author suggests that the value young men place on their mother's work and familial influence during Ð?i m?i contrasts with the findings of much gender scholarship on women's social and economic (im) mobility in the 1990s in Vietnam and on young men's own masculinist narratives. Most gender-sensitive research in this area has suggested that Vietnamese women remained curtailed in the early 1990s by a resurgence of male-oriented kinship systems and patriarchal structures at household level. However, the author discusses the young men as being equivocal. While invoking broad Confucian tropes, these men remember their mothers as economically dynamic relative to their fathers. This led to the informants citing their mother's histories of economic risk-taking as exemplifying free-market capability. Further, the finding suggests that Vietnamese women's social and economic mobility in the 1990s strongly affected young men's contemporary ideas and practices related to masculinity.  相似文献   

SIMION MEHEDINŢI AND MODERN ROMANIAN GEOGRAPHY     

《The Professional geographer》2013,65(4):452-458

The foundations of modern Romanian geography were laid by one man, Simion Mehedin?i, at the beginning of the twentieth century. His systematic view of a unified geography developed from the ideas formed during his education in France and Germany, particularly under the influence of Ratzel. His ideas, propagated by his followers, are still regarded as valid by the present generation of Romanian geographers.  相似文献   

Local and Nonlocal Magnetic Diffusion and Alpha-Effect Tensors in Shear Flow Turbulence     

Axel Brandenburg  Dmitry Sokoloff 《地球物理与天体物理流体动力学》2013,107(4):319-344

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Hydrological effects of water management measures in the Dovinė River basin,Lithuania     

《水文科学杂志》2013,58(2):363-374

Abstract

Lake ?uvintas, located in southern Lithuania in the Dovin? River basin, is one of the largest lakes and oldest nature reserves in the country. However, changes in the hydrology of the Dovin? River basin, caused by large-scale land reclamation and water management works carried out in the 20th century, have resulted in a significant decrease in the biodiversity of the lake and surrounding wetlands. In order to halt the ongoing deterioration of the lake and wetlands, solutions have to be found at the basin level. Using the SIMGRO model, various measures were therefore analysed to evaluate their impact on the water management in the Dovin? River basin. The results show that it is impossible to fully restore the water dynamics and flow pattern in the Dovin? River to their original state. However, a good measure for improving the hydrological conditions is to block drainage ditches and remove bushes and trees from the wetlands.  相似文献   

On the frontal condition for finite amplitude α2Ω-dynamo wave trains in stellar shells     

Andrew P. Bassom  Andrew M. Soward 《地球物理与天体物理流体动力学》2013,107(3-4):285-328

Abstract

In a previous paper, Bassom et al. (Proc. R. Soc. Lond. A, 455, 1443–1481, 1999) (BKS) investigated finite amplitude αΩ-dynamo wave trains in a thin turbulent, differentially rotating convective stellar shell; nonlinearity arose from α-quenching. There asymptotic solutions were developed based upon the small aspect ratio ε of the shell. Specifically, as a consequence of a prescribed latitudinally dependent α-effect and zonal shear flow, the wave trains have smooth amplitude modulation but are terminated abruptly across a front at some high latitude θ_F. Generally, the linear WKB-solution ahead of the front is characterised by the vanishing of the complex group velocity at a nearby point θ_f; this is essentially the Dee–Langer criterion, which determines both the wave frequency and front location.

Recently, Griffiths et al. (Geophys. Astrophys. Fluid Dynam. 94, 85–133, 2001) (GBSK) obtained solutions to the α²Ω-extension of the model by application of the Dee—Langer criterion. Its justification depends on the linear solution in a narrow layer ahead of the front on the short O(θ_f—θ_F) length scale; here conventional WKB-theory, used to describe the solution elsewhere, is inadequate because of mode coalescence. This becomes a highly sensitive issue, when considering the transition from the linear solution, which occurs when the dynamo number D takes its critical value D _c corresponding to the onset of kinematic dynamo action, to the fully nonlinear solutions, for which the Dee—Langer criterion pertains.

In this paper we investigate the nature of the narrow layer for α²Ω-dynamos in the limit of relatively small but finite α-effect Reynolds numbers R _α, explicitly ε^½ ? R ² _α ? 1. Though there is a multiplicity of solutions, our results show that the space occupied by the corresponding wave train is generally maximised by a solution with θ_f—θ_F small; such solutions are preferred as evinced by numerical simulations. This feature justifies the application by GBSK of the Dee—Langer criterion for all D down to the minimum D _min that the condition admits. Significantly, the frontal solutions are subcritical in the sense that |D _min| ≤ |D _c|; equality occurs as the α-effect Reynolds number tends to zero. We demonstrate that the critical linear solution is not connected by any parameter track to the preferred nonlinear solution associated with D _min. By implication, a complicated bifurcation sequence is required to make the connection between the linear and nonlinear states. This feature is in stark contrast to the corresponding results for αΩ-dynamos obtained by BKS valid in the limit R _{2 α} ? ε^½, which, though exhibiting a weak subcriticality, showed that the connection follows a clearly identifiable nonbifurcating track.  相似文献   

The Kitab-ı Bahriye (Book of Navigation) of Piri Reis     

《The Cartographic journal》2013,50(3):278-283

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What Drives the Decadal Variability of Global Tropical Storm Days from 1965 to 2019?     

Yifei DAI  Bin WANG  Weiyi SUN 《大气科学进展》2022,39(2):344-353

The tropical storm day(TSD)is a combined measure of genesis and lifespan.It reflects tropical cyclone(TC)overall activity,yet its variability has rarely been studied,especially globally.Here we show that the global total TSDs exhibit pronounced interannual(3-6 years)and decadal(10 years)variations over the past five-to-six decades without a significant trend.The leading modes of the interannual and decadal variability of global TSD feature similar patterns in the western Pacific and Atlantic,but different patterns in the Eastern Pacific and the Southern Indian Ocean.The interannual and decadal leading modes are primarily linked to El Ni?o-Southern Oscillation(ENSO)and Pacific Decadal Oscillation(PDO),respectively.The TSDs-ENSO relationship has been steady during the entire 55-year period,but the TSDs-PDO relationship has experienced a breakdown in the 1980 s.We find that the decadal variation of TSD in the Pacific is associated with the PDO sea surface temperature(SST)anomalies in the tropical eastern Pacific(PDO-E),while that in the Atlantic and the Indian Ocean is associated with the PDO SST anomalies in the western Pacific(PDO-W).However,the PDO-E and PDO-W SST anomalies are poorly coupled in the 1980 s,and this"destructive PDO"pattern results in a breakdown of the TSDs-PDO relationship.The results here have an important implication for seasonal to decadal predictions of global TSD.  相似文献   

28 March 1970 Gediz earthquake fault,western Turkey: palaeoseismology and tectonic significance     

《International Geology Review》2012,54(10):1191-1201

On 28 March 1970, an unexpected and destructive earthquake (Ms = 7.2) originated along the Erdo?mu? fault (EF), which forms the southern margin of the modern Erdo?mu?–Yenigediz graben in the central part of the Ak?ehir–Simav fault system. The EF is a N-dipping normal fault, ～12 km long, generally E–W-trending, and characterized by a minor right-lateral strike–slip component. To determine its past activity, a palaeoseismological exploratory trenching study was conducted. Two trenches (EFT-1 and EFT-2) were excavated on the ground surface rupture of the 1970 Gediz earthquake near Erdo?mu? village. Based on the relative displacement between units observed and mapped in EFT-1, at least three events were identified. Two events were also identified in EFT-2. Only one of the events in EFT-1 can be dated via ¹⁴C. The estimated recurrence interval on the EF is ～910 ± 40 years.  相似文献   

On the geology of the Indoburman ranges     

R. O. Brunnschweiler 《Australian Journal of Earth Sciences》2013,60(1):137-194

The mountains of western and northwestern Burma consist chiefly of colossal accumulations of Palaeocene to Eocene (Arakan and Chin Hills) or Senonian to Eocene (Naga Hills) Flysch of varying, including “exotic”, facies.

The main frontal thrust zone of the Alpino‐Himalayan Tectogene lies along and within the easternmost ranges of this Indoburman system, not along the western margin (Shan Scarp) of the Sinoburman Highlands. Some of the highest mountains in the Naga Hills are “Klippen” of metamorphics lying on Flysch.

The Flysch ranges arose during the Oligocene but along the Arakan Coast there is ample evidence of an equally important earlier orogenic phase (latest Cretaceous) now almost totally buried beneath the western half of the Indoburman system and the post‐Oligocene “Argille Scagliose” and “Macigno” on‐lapping eastwards from the Bengal‐Assam embayment.

The lowlands of Central and Lower Burma do not represent a foreland feature, but an intramontane Molasse‐filled basin to which the sea retained access because of a general southerly plunge of the Alpine Tectogene. Geotec‐tonically, it is analogous to the Tibetan Plateau, not the Indo‐Gangetic lowlands.  相似文献   

Geology and age of the Glikson impact structure,Western Australia     

F. A. Macdonald  M. T. D. Wingate  K. Mitchell 《Australian Journal of Earth Sciences》2013,60(4-5):641-651

The Glikson structure is an aeromagnetic and structural anomaly located in the Little Sandy Desert of Western Australia (23°59'S, 121°34′E). Shatter cones and planar microstructures in quartz grains are present in a highly deformed central region, suggesting an impact origin. Circumferential shortening folds and chaotically disposed bedding define a 19 km-diameter area of deformation. Glikson is located in the northwestern Officer Basin in otherwise nearly flat-lying sandstone, siltstone and conglomerate of the Neoproterozoic Mundadjini Formation, intruded by dolerite sills. The structure would not have been detected if not for its strong ring-shaped aeromagnetic anomaly, which has a 10 km inner diameter and a 14 km outer diameter. We interpret the circular magnetic signature as the product of truncation and folding of mafic sills into a ring syncline. The sills most likely correlate with dolerites that intrude the Boondawari Formation ～25 km to the north, for which we report a SHRIMP U?–?Pb baddeleyite and zircon age of 508?±?5 Ma, providing a precise older limit for the impact event that formed the Glikson structure.  相似文献