Water,Wind, Wood,and Trees: Interactions,Spatial Variations,Temporal Dynamics,and their Potential Role in River Rehabilitation

Recent Australian research has quantified the role of large wood (wood of any origin and length with a diameter greater than 0.1 m) in dissipating stream energy, forming pool habitats by local bed scour, protecting river banks from erosion, and damming rivers with long rafts causing avulsions. Large wood in Australian streams is sourced by a range of processes from the nearby riparian zone which has usually been degraded by post‐European settlement vegetation clearing. Large wood loadings within the bankfull channel are dependent not only on the type and quality of the riparian plant community but also on bankfull specific stream power, channel width, and the processes of large wood delivery to the stream. While bank erosion and floodplain stripping by catastrophic floods are obvious and important delivery mechanisms, treefall and trunk and branch breakage by strong winds during tropical cyclones and severe storms are also significant in the tropics. Furthermore, wood decay and downstream transport produce temporally dynamic large wood distributions. The longevity of natural large wood structures in rivers, such as rafts, debris dams, and log steps, requires determination. River rehabilitation programs need to not only include the reintroduction of large wood, but also carefully plan the spatial distribution of that wood, the most appropriate type and range of large wood structures, and, most importantly, the revegetation of the riparian zone to ensure a natural long‐term source of large wood. Exotic species management is an essential part of river rehabilitation.     

MICROZONATION OF THE EXPECTED SEISMIC SITE EFFECTS ACROSS PORT VILA,VANUATU

The city of Port Vila, Vanuatu, is located in one of the most active seismic regions on earth. Earthquakes are felt frequently and, due to very rapid plate convergence rates, return period of large earthquakes (M>6) in the New Hebrides Benioff zone can be less than 10 years. Even though Port Vila does not lie on an identified seismic fault zone, strong motions by nearby earthquakes have to be expected due to the city's geographical location close to the plate boundary of New Hebrides convergence zone. An accurate estimation of the seismic ground motion across the city is of prime importance for urban developments and mitigation of earthquake risk. Following many examples of monitored strong earthquakes in the current century, it is evident that the local site effects may have a dominant contribution to the intensity of damage and destruction. In this study we focussed on the first stage of associating site effects and seismic hazard by preparing a microzonation map for Port Vila. The seismic microzonation of the city has been carried out to provide a detailed map of the zones that exhibit site effects in terms of resonance frequencies and approximated amplification of the ground shaking. Having in mind that these data will be used in improving building design to sustain strong ground motions, our analysis is limited to the frequency band of 1–10 Hz, corresponding to the expected resonance of different types of buildings in Port Vila. The Nakamura technique has been used to estimate site amplification effects from single station noise recordings. Interestingly, excluding one site located on an old dump zone, the amplification factors at about the 100 sites surveyed in Port Vila remain below 3 with an average well below 2 in the 1 to 10 Hz frequency band. These results suggest that there is no significant Vs velocity change in consequently layered material and that the uppermost sedimentary layers in the surveyed down town area are relatively thin. These observations are in agreement with the mapping of limestone terraces throughout Port Vila area. However, both the surface geology and results from seismic zonation indicate a thicker (up to several tens of meters) sedimentary cover around the Bauerfield airport and in the Mele terrace zone. Low resonance frequencies (around and below 1 Hz) and amplification factor of the order of 5 were observed over this large area, immediately outside Port Vila. Any building development in this area should take these results into account.     

HISTORICAL MEANINGFULNESS IN SHARED ACTION

Why should past occurrences matter to us as such? Are they in fact meaningful in a specifically historical way, or do they only become meaningful in being connected to other sorts of meaning—political or speculative, for example—as many notable theorists imply? Ranke and Oakeshott affirmed a purely historical meaningfulness but left its nature unclear. The purpose of this essay is to confirm historical meaningfulness by arguing that our commanding practical interest in how we share action with other actors is distinctively engaged by presumed information about past occurrences. We recognize that past occurrences have determined the conditions of action sharing, constraining our practice with regard to which actors we share practical reality with and which compounding actions we may or must join in progress.     

The influence of Operation Allied Force on the development of the jus ad bellum

Some have argued that NATO's air campaign against Serbia in 1999 was manifestly unlawful, others that it was an entirely legitimate humanitarian intervention. A third position suggests that the intervention while unlawful, in the strictest sense, was nonetheless legitimate. Here, a customary law right to intervene was seen as emerging, permitting action to prevent a mass atrocity crime, even when UN Security Council authorization was absent. Did Operation Allied Force, then, add to the case for the emergence of this new customary norm? While the 1990s was a decade of humanitarian intervention, the decade since has been dominated by international action against terrorism and, of course, the effects of the highly controversial US and British led invasion of Iraq. In this context, there is scant evidence that a customary right or obligation to intervene for humanitarian reasons has crystallized since 1999. But if Kosovo achieved anything, it was to prompt greater attention to the merits of the argument in favour of a ‘responsibility to protect’. If NATO's 1999 action were repeated today in a similarly unauthorized manner it would still be unlawful, but it would perhaps be seen as a legitimate means to preventing a mass atrocity crime.     

Rethinking Remoteness: A Simple and Objective Approach

This paper re‐examines the characteristics and assumptions of current remoteness/accessibility classifications in Australia and proposes a simple and easily understandable alternative measure for remoteness. In this study, remoteness is redefined simply as the average distance between two nearest people within an appropriate spatial unit where population distribution is assumed to be homogenous. By definition, the most straightforward remoteness and incapacity index (RII) would be remoteness times a measure of the incapacity for social and commercial interaction, where remoteness is gauged by the square root of the area divided by the population, and incapacity is measured by the reciprocal of population. Australian Bureau of Statistics Statistical Local Area (SLA) level population data and digital boundaries have been utilised for assessment of this index. The utility of the RII is demonstrated with two examples of activity measures for general practitioner services and businesses. At the State/Territory level, RIIs are negatively related to both general practitioner services per person (Pearson correlation coefficient r=?0.873), and the number of businesses per person (r=?0.546). The correlation can be further enhanced by normalising the distributions of the remoteness scores with a simple logarithmic function. The strong correlations confirm that remoteness has a substantial inverse impact on daily activities. Greater distance means longer time and higher costs for travelling, diseconomy of scale, and higher personnel costs. The RII provides an alternative measure of remoteness that is both intuitive and statistically straightforward and, at an SLA level, closely coincides with the commonly used but complex Accessibility/Remoteness Index of Australia Plus (ARIA+). Significantly, the RII is free of the service specific and policy sensitive adjustments justified by accessibility that have been introduced into existing measures.     

South Sudan: a volatile dynamic of accountability and peace

Since the warring parties to South Sudan's civil war (2013–15) signed a peace agreement in August 2015, South Sudan has endured a series of setbacks and clashes that have threatened the fragile peace process. This article examines many key factors affecting the peace process, including rampant corruption, military factionalism, gross human rights abuses and ineffective foreign intervention/pressure. It shows that the past and present failure to structure accountability at the institutional level drives the instability and distrust that has limited the political dialogue and consensus needed to implement the peace deal. To frame this issue of accountability, the article distinguishes between core (essential) and peripheral (self‐serving) objectives of promoting accountability. In doing so, it seeks to devise and apply the logic of this dynamic of accountability and to explain the unexpected outcomes of South Sudan's conflict. It argues that, rather than transforming the conditions and hostile relations of South Sudan's situation, international demands for accountability continue to fuel the volatile tensions between international authorities and the various factions inside the Sudan People's Liberation Movement/Army (SPLM/A). The central conclusion the article draws is that instead of signifying the official beginning of the end of the conflict, the peace agreement has wedged itself between the core and peripheral objectives of accountability, thereby setting the stage for further stalemate and increasing distrust among domestic and international authorities.     

Can silence speak volumes? Widukind's Res Gestae Saxonicae and the coronation of Otto I reconsidered

The Res Gestae Saxonicae, Widukind of Corvey's chronicle of the rise of the Ottonian kings, waxes lyrical about Otto I's coronation as king at Aachen in 936 but passes in silence over his coronation as emperor at Rome in 962. This causes difficulties of interpretation, because the text is generally considered to constitute a unified narrative up to the end of its shortest surviving recension, dated to 967 or 968; scholars have previously dealt with these difficulties by claiming that Widukind's work was a ‘subtle polemic’ against the role of the pope in the making of an emperor. This article suggests instead that only the sections documenting events up to c.961 constitute a unified text, subsequent chapters being no more than hastily compiled addenda. Widukind's notorious omission of the imperial coronation was thus an accidental feature of the text, not the cornerstone of an ideological claim about the emperor's direct connection to God. His portrayal of the Aachen coronation establishes Otto's multiple claims to be the rightful king without differentiating qualitatively between them.     

Wilsonianism: the dynamics of a conflicted concept

Americans have generally seen the principles and objectives proclaimed by President Woodrow Wilson during the First World War as having continued relevance for United States foreign policy. However, they have often differed over their application to specific situations, particularly because there is likely to be a tension between a drive to establish democratic values across the globe and commitment to a universal system of collective security. Rather than seeking a pure, abstract definition of 'Wilsonianism', it is more illuminating to examine its origins and evolution in relation to the development of American foreign policy over the years. Tracing this historical process reveals that Wilson committed himself to a postwar league of nations during the period of American neutrality, but it was only as the United States became a belligerent that the spread of democratic government became a policy objective, and then only in a partial and qualified way. A similar pattern has been discernible in subsequent decades. It has been during conflicts, or the run-up to them, that the more ideological and revisionist aspects of Wilsonian principles have come to the fore, whereas it has been in the aftermath of conflicts that there has been the greatest interest in the potentialities of a universal collective security organization. There has also been a broad shift of emphasis over time. As confidence in America's power position has grown, the core of Wilson's legacy has more often come to be seen as the promotion of democracy rather than the strengthening of international institutions. The persistence of both themes may be seen as reflecting basic and enduring elements of the policy-making context—on the one hand, the interests of the United States as a status quo power, and on the other, the demands of domestic American opinion.