Scottish landform examples 45: Sgriob na Caillich: a landslide-sourced medial moraine on the Isle of Jura

ABSTRACT

Medial moraines deposited by former glaciers and ice sheets are rare in Scotland. The most prominent example is the Sgriob na Caillich moraine, which consists of two to four parallel belts of angular quartzite boulders that extend northwestwards for over 3.5?km from the SW flank of Beinn an Oir on the Isle of Jura. The boulder belts extend to within 300?m of the present coastline, where they are truncated by a low bluff and raised marine terrace. The source of the moraine coincides with bedrock gullies and cliffs that represent the scars of former rock-slope failure(s), indicating that the moraine debris was sourced by one or more rockfalls or rockslides onto the ice surface after Beinn an Oir had emerged from the thinning ice cover as a nunatak. Exposure dating of boulders on the moraine indicate that it formed at 16.6?±?0.8?ka, consistent with the timing of ice-sheet retreat in this sector. The alignment of the moraine indicates ice-margin retreat to the SE; as regional ice-sheet retreat across the adjacent offshore shelf was to the NE, this anomaly implies that a residual icefield became stranded on Jura during ice-sheet retreat.     

MODELLING OF RC BEAM-COLUMN JOINTS AND STRUCTURAL WALLS

The deformation of beam-column joints may contribute significantly to drift of reinforced concrete (RC) frames. In addition, failure may occur in the joints due to cumulative concrete crushing from applied beam and column moments, bond slip of embedded bars or shear failure as in the case of existing frames with nonductile detailing. When subjected to earthquake loading, failure in RC structural wall is similar to failure of frame joints as it may occur due to cumulative crushing from high flexural stresses, bond slip failure of lap splice, shear failure or a combination of various mechanisms of failure. It is important to include these behavioural characteristics in a simple model that can be used in the analysis of RC frames and RC walls to predict their response under earthquake loading and determine their failure modes.

Global macro models for the beam-column joint and for RC structural walls are developed. The proposed models represent shear and bond slip deformations as well as flexural deformations in the plastic hinge regions. The models are capable of idealising the potential failure mechanism due to crushing of concrete, bond slip or shear with allowance for the simultaneous progress in each mode. The model predictions are compared with available experimental data and good correlation is observed between analytical results and the test measurements.     

Natural and Unnatural Disasters: Responding with Respect for Indigenous Rights and Knowledges

A key challenge for contemporary democratic societies is how to respond to disasters in ways that foster just and sustainable outcomes that build resilience, respect human rights, and foster economic, social, and cultural well‐being in reasonable timeframes and at reasonable costs. In many places experiencing rapid environmental change, indigenous people continue to exercise some level of self‐governance and autonomy, but they also face the burden of rapid social change and hostile or ambiguous policy settings. Drawing largely on experience in northern Australia, this paper argues that state policies can compound and contribute to vulnerability of indigenous groups to both natural and policy‐driven disasters in many places. State‐sponsored programmes that fail to respect indigenous rights and fail to acknowledge the relevance of indigenous knowledge to both social and environmental recovery entrench patterns of racialised disadvantage and marginalisation and set in train future vulnerabilities and disasters. The paper advocates an approach to risk assessment, preparation, and recovery that prioritises partnerships based on recognition, respect, and explicit commitment to justice. The alternatives are to continue prioritising short‐term expediencies and opportunistic pursuit of integration, or subverting indigenous rights and the knowledge systems that underpin them. This paper argues such alternatives are not only unethical, but also ineffective.     

Partisanship,policy entrepreneurs and the market for ideas: what we can learn from policy failure

ABSTRACT

The Office of Living Victoria (OLV), was established in 2011 by the then Liberal-National Party Coalition Government. It was created in response to a water crisis and intended to revolutionise water management and delivery, challenging established authorities and practices consolidated under the previous Labor government in Victoria. There was a decidedly partisan motivation for its conception. The drive for new ideas and innovation created opportunities for policy entrepreneurs who won the competition against more conventional research advocacy, and determined the agenda of the new agency, in the process curbing an existing policy network. Yet within a short period, this initiative was mired in scandal, and ended in 2014 having failed to achieve its purposes. This article explores this instance of policy failure, assessing the policy trajectory of the OLV in relation to the concepts of partisanship, policy entrepreneurship, and policy networks.     

The trials and travails of the Islamic State in Pakistan

While Pakistan is in many ways an ideal location for transnational terrorist groups due to state weakness, Islamic State has had difficulty making headway in the country. In this article, the authors argue that Islamic State’s failures in Pakistan are due to competition from other groups. Drawing on the terrorist competition literature and interviews with Pakistani counterterrorism officials, the authors find that the presence of other groups in Pakistan meant there was little demand for what Islamic State offered. Islamic State relied on splinter groups and defectors for recruitment, which alienated mainstream groups and harmed the group’s capacity. Islamic State’s competition problems were exacerbated by its internationalist ideology, which was at odds with that of many groups in Pakistan, and allowed opposing groups to present themselves as reasonable alternatives to other actors. Despite Islamic State’s lack of success, it and its allies have still engaged in extreme violence in Pakistan as a result of attempts to outbid other groups. This article has implications for fighting terrorism in Pakistan and more generally.     

李续宾败亡三河之役的主要原因新议——与洪均先生商榷

李续宾败亡三河之役的深层原因，不在于“抢掠与放纵”而“严重地削弱了湘军战斗力”，而主要体现在这四个方面：一是天京事变后太平天国新的领导核心的确立，太平军战斗力由此增强；二是李续宾湘军战线拉得过长，兵力分散，很难发挥集中优势兵力敢打敢拼、攻坚克强的特长；三是湖广总督官文配合不力，赵克彰等部湘军临阵脱逃，致使李续宾部湘军陷入孤军作战的绝境；四是李续宾求胜心切，意气用事，听不进他人建议，未能及时采取战略转移的措施。     

Congenital scoliosis: possible causes and consequences in a skeleton from Nubia

Reports of congenital scoliosis (CS) are rare in the literature of paleopathology. This study details severe CS in the complete, well preserved skeleton of an adult male, dated to AD 550–800, from the Sudanese site of Kulubnarti. This skeleton, designated as S‐16, is the most complete archaeologically derived example of CS to be documented. Copyright © 2009 John Wiley & Sons, Ltd.     

The effect of deformation on permeability development in anhydrite and implications for caprock integrity during geological storage of CO2

Geological storage of CO₂ in depleted oil and gas reservoirs is one of the most promising options to reduce atmospheric CO₂ concentrations. Of great importance to CO₂ mitigation strategies is maintaining caprock integrity. Worldwide many current injection sites and potential storage sites are overlain by anhydrite‐bearing seal formations. However, little is known about the magnitude of the permeability change accompanying dilatation and failure of anhydrite under reservoir conditions. To this extent, we have performed triaxial compression experiments together with argon gas permeability measurements on Zechstein anhydrite, which caps many potential CO₂ storage sites in the Netherlands. Our experiments were performed at room temperature at confining pressures of 3.5–25 MPa. We observed a transition from brittle to semi‐brittle behaviour over the experimental range, and peak strength could be described by a Mogi‐type failure envelope. Dynamic permeability measurements showed a change from ‘impermeable’ (<10^?21 m²) to permeable (10^?16 to 10^?19 m²) as a result of mechanical damage. The onset of measurable permeability was associated with an increase in the rate of dilatation at low pressures (3.5–5 MPa), and with the turning point from compaction to dilatation in the volumetric versus axial strain curve at higher pressures (10–25 MPa). Sample permeability was largely controlled by the permeability of the shear faults developed. Static, postfailure permeability decreased with increasing effective mean stress. Our results demonstrated that caprock integrity will not be compromised by mechanical damage and permeability development. Geofluids (2010) 10 , 369–387     

关于接受及谢绝的过渡语语用失误剖析

近年来,随着语际语用学（interlanguage pragmatics）的兴起,语言迁移问题备受人们的关注,其中母语的负迁移更是跨文化和二语习得领域内学者们关注的一个重点问题,本文拟从语用迁移中的语用语言迁移和社交语用迁移的两个层面,以跨文化交际中的实例来探讨母语语用负迁移对跨文化交际中的语用失误的影响作用。     

论民国地方性农业科研机构的历史命运--以江西省农业院为中心

江西省农业院是1934年3月设立的一个全省性的农业技术改进和推广机构,在其存在的15年历史中,从许多方面对江西农业现代化进行了卓有成效的探索,做出了巨大的贡献。但由于缺乏相应的社会条件作支撑,其推进农业现代化的种种努力最终逃脱不了失败的命运。