bluuebunny/crossref_metadata_2025_split huggingface dataset:
PRIMITIVE TECHNIQUES: FROM ‘CUSTOMARY’ TO ‘ARTISANAL’ MINING IN FRENCH WEST AFRICA
Authors: D'AVIGNON ROBYN 
Published: August 2018

AbstractSince the commodity boom of the early 2000s, the visibility of ‘artisanal’ or ‘small-scale’ mining has grown in media coverage and development policies focused on Africa. This article argues that the regulatory category of ‘artisanal’ mining in Africa originated during the colonial period as ‘customary mining’. I build this case through a regional case study of mining policies in the colonial federation of French West Africa, where a single decree accorded African subjects ‘customary rights’ to seasonally mine gold and rock salt in restricted areas. By contrast, colonial citizens, mostly Europeans, accessed stable mining titles. Customary mining rights never codified actual African mining ‘customs’, as colonial officials argued. Rather, this law marked the boundary between the technological status of French subjects and citizens. Core elements of this colonial legal framework have been incorporated into postcolonial policies governing the rights of citizens to mineral resources in Africa.
Ruptures revoked: why the Central African Republic's unprecedented crisis has not altered deep-seated patterns of governance
Authors: Glawion Tim , de Vries Lotje 
Published: August 2018

AbstractThe Central African Republic experienced unprecedented violence between 2012 and 2014. We analyse three recent ruptures that developed as a result of this crisis, suggesting a break with the country's past. First, the Séléka rebellion that started in 2012; second, the establishment of a robust UN Peacekeeping mission in 2014; and finally, the democratic election of a civilian president in 2016. However, three deep-rooted patterns of governance have in each case transformed these ruptures. A history of outsourced politics, a plurality of violence and peripheral neglect push actors to perpetuate the violent past rather than breaking with it. We conclude that after an initial attempt to break with the CAR's long-term political economic trends, rebel groups, the UN mission and the democratic government have backtracked and now risk reinforcing the violence that mark politics and everyday life in the country.
Beyond post-apartheid politics? Cleavages, protest and elections in South Africa
Authors: Paret Marcel 
Published: August 2018

AbstractDeclining electoral support for South Africa's ruling party, the African National Congress (ANC), suggests a potential weakening of the anti-apartheid nationalism that defined the immediate post-apartheid period. Using two surveys of voters in primarily poor and working-class black areas, conducted during the 2014 (national) and 2016 (local) elections, as well as three case studies of protest by workers, poor communities and students, this article examines the social cleavages and political dynamics that underpinned deepening political competition. Results show that voting decisions varied according to gender, age, ethnicity and receipt of welfare benefits. Different public provisions mattered most during national versus local elections, demonstrating that voters paid close attention to government operations. Underscoring political fluidity, some instances of protest reinforced ANC dominance while others fed into support for the opposition. The findings challenge notions of uncontested one party dominance, revealing instead that some poor black voters are critically evaluating the ANC's performance and developing oppositional political identities.
Going beyond dyadic consultation relationships: information exchange in multi-step participation procedures
Authors: Fink Simon , Ruffing Eva 
Published: August 2018

AbstractFor decades, political scientists have observed the diffusion of complex governance arrangements including public participation procedures to ameliorate the democratic deficit inherent in these often-opaque structures. This article asks how the information provided in consultation statements is used by the consulting actors. To account for the multi-step character, the article combines exchange theory with a principal-agent approach, acknowledging that several actors in a delegation chain might be interested in the provided information. We use a typical case of a multi-step procedure – participation in German grid development – to test both theories. Neither the private firms nor the regulator use information provided in their own consultations, contradicting exchange theory. But the regulator considers ecological submissions made in the firms’ consultation, as the principal-agent approach suggests. Thus, a principal-agent approach allows us to find influence of consultation statements that exchange theory cannot detect.
A survey on routing problems and robotic systems
Authors: Macharet Douglas G. , Campos Mario F. M. 
Published: August 2018

SUMMARYPlanning paths that are length or time optimized or both is an age-long problem for which numerous approaches have been proposed with varied degree of success depending on the imposed constraints. Among classical instances in the literature, the Traveling Salesman Problem and the Vehicle Routing Problem have been widely studied and frequently considered in the realm of mobile robotics. Understandably, the classical formulation for such problems do not take into account many different issues that arise in real-world scenarios, such as motion constraints and dynamic environments, commonly found in actual robotic systems, and consequently the solutions have been generalized in several ways. In this work, we present a broad and comprehensive review of the classical works and recent breakthroughs regarding the routing techniques ordinarily used in robotic systems and provide references to the most fundamental works in the literature.
Who Owns My Autonomous Vehicle? Ethics and Responsibility in Artificial and Human Intelligence
Authors: HARRIS JOHN 
Published: August 2018

Abstract:This article investigates both the claims made for, and the dangers or opportunities posed by, the development of (allegedly), aspiring or “would-be” autonomous vehicles and other artificially superintelligent machines. It also examines the dilemmas posed by the fact that these individuals might develop ideas above their station. These ideas may also limit or challenge the legitimacy of the proposed management and safety strategies that might be devised to limit the ways in which they might function or malfunction.
Appropriate use of a beta-blocker in paediatric coronary CT angiography
Authors: Watanabe Hirofumi , Kamiyama Hiroshi , Kato Masataka , Komori Akiko , Abe Yuriko , Ayusawa Mamoru 
Published: August 2018

AbstractBackgroundThere is no standard dose or protocol for beta-blocker administration as preconditioning in children undergoing coronary CT angiography.MethodsA total of 63 consecutive patients, with a mean age of 10.0±3.1 years, who underwent coronary CT angiography to assess possible coronary complications were enrolled in a single-centre, retrospective study. All patients were given an oral beta-blocker 1 hour before coronary CT angiography. Additional oral beta-blocker or intravenous beta-blocker was given to those with a high heart rate. We compared image quality, radiation exposure, and adverse events among the patients without additional beta-blocker, with additional oral beta-blocker, and with additional intravenous beta-blocker.ResultsThere were no significant differences in image quality or radiation exposure among the groups. The heart rate just before scanning was significantly correlated with image quality (p<0.001, r=−0.533) but was not correlated with radiation exposure (p=0.45, r=0.096). There were no adverse events related to any allergic reaction, thereby showing the effectiveness of the beta-blocker.ConclusionInitial oral beta-blocker administration (0.8 mg/kg/dose) should be administered to all children undergoing coronary CT angiography. Additional intravenous beta-blocker should be given to those with poor heart rate control to improve image quality without increasing radiation exposure or allowing adverse events.
A neural approach for inducing multilingual resources and natural language processing tools for low-resource languages
Authors: ZENNAKI O. , SEMMAR N. , BESACIER L. 
Published: August 2018

AbstractThis work focuses on the rapid development of linguistic annotation tools for low-resource languages (languages that have no labeled training data). We experiment with several cross-lingual annotation projection methods using recurrent neural networks (RNN) models. The distinctive feature of our approach is that our multilingual word representation requires only a parallel corpus between source and target languages. More precisely, our approach has the following characteristics: (a) it does not use word alignment information, (b) it does not assume any knowledge about target languages (one requirement is that the two languages (source and target) are not too syntactically divergent), which makes it applicable to a wide range of low-resource languages, (c) it provides authentic multilingual taggers (one tagger forNlanguages). We investigate both uni and bidirectional RNN models and propose a method to include external information (for instance, low-level information from part-of-speech tags) in the RNN to train higher level taggers (for instance, Super Sense taggers). We demonstrate the validity and genericity of our model by using parallel corpora (obtained by manual or automatic translation). Our experiments are conducted to induce cross-lingual part-of-speech and Super Sense taggers. We also use our approach in a weakly supervised context, and it shows an excellent potential for very low-resource settings (less than 1k training utterances).
What Are We Talking about When We Talk about Digital Protectionism?
Authors: AARONSON SUSAN ARIEL 
Published: August 2018

AbstractFor almost a decade, executives, scholars, and trade diplomats have argued that filtering, censorship, localization requirements, and domestic regulations are distorting the cross-border information flows that underpin the internet. Herein I use process tracing to examine the state and implications of digital protectionism. I make five points: First, I note that digital protectionism differs from protectionism of goods and other services. Information is intangible, highly tradable, and some information is a public good. Secondly, I argue that it will not be easy to set international rules to limit digital protectionism without shared norms and definitions. Thirdly, the US, EU, and Canada have labeled other countries policies’ protectionist, yet their arguments and actions sometimes appear hypocritical. Fourth, I discuss the challenge of Chinese failure to follow key internet governance norms. China allegedly has used a wide range of cyber strategies, including distributed denial of service (DDoS) attacks (bombarding a web site with service requests) to censor information flows and impede online market access beyond its borders. WTO members have yet to discuss this issue and the threat it poses to trade norms and rules. Finally, I note that digital protectionism may be self-defeating. I then draw conclusions and make policy recommendations.
CHABAUTY LIMITS OF SIMPLE GROUPS ACTING ON TREES
Authors: Caprace Pierre-Emmanuel , Radu Nicolas 
Published: August 2018

Let$T$be a locally finite tree without vertices of degree $1$. We show that among the closed subgroups of$\text{Aut}(T)$acting with a bounded number of orbits, the Chabauty-closure of the set of topologically simple groups is the set of groups without proper open subgroup of finite index. Moreover, if all vertices of$T$have degree${\geqslant}3$, then the set of isomorphism classes of topologically simple closed subgroups of$\text{Aut}(T)$acting doubly transitively on$\unicode[STIX]{x2202}T$carries a natural compact Hausdorff topology inherited from Chabauty. Some of our considerations are valid in the context of automorphism groups of locally finite connected graphs. Applications to Weyl-transitive automorphism groups of buildings are also presented.
A Soldier’s Faith: The Civil War Experiences and Reflections of William Porcher DuBose
Authors: Slocum Robert B. 
Published: August 2018

AbstractThe noted Episcopal theologian William Porcher DuBose was a seminarian when the American Civil War began. He was torn between continuing his studies for ordination and joining the Confederate Army. He felt duty bound to defend his homeland, and he served heroically, wounded in combat, and taken as a prisoner of war. Troubled by the senselessness and inhumanity of war, he was eventually ordained and served as a military chaplain. He devoted himself to faith and ministry when he realized his country and culture were lost. DuBose vividly presents his views on war and faith in his wartime correspondence with his fiancée and later wife Anne Barnwell Perroneau, and other writings. His experiences of loss and poverty were the basis for his theology of the cross and his understanding of the role of suffering in the Christian life, and he subsequently dedicated himself to faith, peace, and reconciliation.
Effect of biofertilizers and diatomaceous earth on life and movement of subterranean termites under laboratory conditions
Authors: Ahmed Sohail , Hassan Babar , Farooq Muhammad Umer 
Published: August 2018

AbstractThe presence of biofertilizers can affect the life and movement of subterranean organisms in the soil. In the current study, the effect of three biofertilizers (Unigrow, Rhizogold and Rhizogold Plus) alone and in combination with diatomaceous earth (DE) and insecticides on mortality and movement of subterranean termites, Coptotermes heimi (Wasmann), was investigated under laboratory conditions. The mortality of termites in soil mixed with biofertilizers was low as compared to the control treatment, which led to significant mortality. Length of galleries formed by termites with the addition of Unigrow in the soil was significantly higher as compared to the other two biofertilizers and control treatments. Mortality increased in the presence of insecticides and DE in the soil substrate. Unigrow mixed soil having chlorfenapyr had maximum mortality and minimum gallery length followed by Rhizogold and Rhizogold Plus. The addition of DE and insecticide further enhances mortality, and we recommend that some toxic elements should be incorporated in biofertilizers to control subterranean termites.
An analysis of the feasibility of an extreme operational risk pool for banks
Authors: Li Yifei , Allan Neil , Evans John 
Published: August 2018

AbstractOperational risk events in banks include extreme events with significant losses being incurred and with substantial impact on share prices. A pooling arrangement between banks that would be able to reduce overall costs and reduce share price impacts would seem desirable, but one of the major inhibiting factors to establish the feasibility of such a pooling arrangement is that statistical models of these extreme events are difficult to build with any reliability. This paper uses both quantitative and qualitative analysis of operational risk losses for EU and US banks over the period 2008–2014 to establish the feasibility of creating a pooling arrangement between the banks and concludes that such an arrangement might be feasible but would require compulsory membership of the pool and capping of losses.
Wideband radar cross-section reduction of a microstrip antenna using slots
Authors: Zhang Jiakai , Li Haixiong , Zheng Qi , Ding Jun , Guo Chenjiang 
Published: August 2018

AbstractIn this study, a new microstrip patch antenna with wideband radar cross-section (RCS) reduction is presented. The RCS of the proposed antenna was reduced by subtracting the current-direction slots of the patch, with the radiation performance sustained not only for the current-direction subtraction, but also for the no modification in the ground plane. Modified and reference antenna were fabricated and measured. The simulation and measurement results showed that the modified antenna reduced the in-band and out-band RCS simultaneously with no detriment to the radiation performance. In the frequency band from 3.9 to 8.1 GHz, the RCS of the modified antenna was reduced in the whole band compared with the RCS of the reference antenna. The maximum RCS reduction was 7 dB at a frequency of 6.7 GHz.
Localization Effects on the Dissipation of Gravity Wave Packets in the Upper Mesosphere and Lower Thermosphere
Authors: Heale C. J. , Walterscheid R. L. , Snively J. B. 
Published: August 2018

AbstractGravity waves not subject to breaking or filtering will dissipate due to viscosity and thermal conduction in the thermosphere. However, the evolutions of wave packets, and the altitudes they reach, are highly dependent upon the spectral content. In this paper, a 2‐D numerical model is used to investigate the effect of spatial localization (and thus spectral content) of a wave packet on its dissipation, dispersion, and spectral evolution. It is found that most wave packets launched below the thermosphere evolve to smaller central vertical wavelengths as the faster, longer vertical wavelength components reach the dissipative thermosphere and are removed first, leaving the shorter, slower components to become dominant at later times. This effect is greater for more spatially localized packets (spectrally broadband) as rapid dispersion leads to the rapid spreading of the wave over large altitude regions that could be interpreted as different waves (i.e., from different sources) by instruments observing different altitudes. Dispersion can also be accelerated by the refractive effects of the thermospheric temperature gradient. Initially, Gaussian broadband packets can evolve into asymmetric distributions which are not well described by standard assumptions (e.g., Gaussian packets), requiring instead numerical simulation to properly describe them. In the case that the vertical scale is smaller than the scale height, and dissipation acts immediately on the packet (i.e., it is generated in situ in the dissipative thermosphere), then the scale‐dependent nature of dissipation removes the shorter wavelengths components first, leading to the spectrum evolving toward larger vertical wavelengths.
Observations From a Global Database of Impact Craters on Mercury With Diameters Greater than 5 km
Authors: Herrick R. R. , Bateman E. M. , Crumpacker W. G. , Bates D. 
Published: August 2018

AbstractWe created a global database of Mercurian impact craters with diameters over 5 km, excluding obvious secondary craters. For craters over 10 km in diameter, we assessed basic morphological parameters, including an evaluation of whether significant postimpact filling occurred, the nature of any central structure, a three‐point assessment of degradation state, and a recording of the presence of rays and other atypical features. We used the database to evaluate the spatial patterns of different subsets of the crater population. The distribution of craters with diameters of 5 to 10 km compared to the distribution of larger craters shows many background secondaries associated with primary craters with diameters over 150 km, and their abundance would distort crater counts for surface dating. Counting only unfilled craters gives an estimate of the last possible date of endogenic geologic activity on a surface. Only a third of craters with diameters over 20 km are classified as unfilled, and the highest spatial density of unfilled craters is about half the total population at the same location. Our results support a globally rapid cessation in volcanism, with variations in the volume of late stage volcanism accounting for variations in the number of filled craters. We see regional variations of interior morphology for craters ~100 km in diameter that do not obviously correlate with other patterns derived from surface observations; our observations imply that there are variations in the mechanical properties of the upper several kilometers of crust.
Response of Surface Topography to Basal Variability Along Glacial Flowlines
Authors: Ng Felix S. L. , Ignéczi Ádám , Sole Andrew J. , Livingstone Stephen J. 
Published: August 2018

AbstractPredicting the amplitude and distribution of surface undulations on ice sheets and glaciers is useful because of their influence on surface mass and energy balance, atmospheric boundary layer processes, and supraglacial meltwater routing. We develop an approximate method of calculating the surface elevation response due to spatial perturbations in basal topography and slipperiness, on two‐dimensional flow sections whose thickness, surface slope, and basal slip ratio vary along flow. Our main result is an integral expressing nonuniform transfer of basal variability to the surface. It uses published Fourier transfer functions derived through perturbing plane‐slab Stokes flow but circumvents the need to subwindow the spatial domain to estimate the response. We test the method on ice flow synthesized by a finite‐element model of Stokes flow with constant viscosity and known basal topography and slipperiness perturbations; in this case, it predicts the observed size and shape of the surface undulations well, capturing more than 90% of their variance. Application of the method to the central flowline of Columbia Glacier, Alaska, and a flowline on the Greenland Ice Sheet ending on Nordenskiöld Glacier, using knowledge of the approximate bed topography and ignoring the unknown slipperiness forcing, yields less faithful prediction of their surface undulations (40–50% of their variance) but demonstrates the method's potential to reproduce their qualitative features. We discuss the factors limiting the method's performance on real flowlines.
Influence of Solar Activity on Penetration of Traveling Planetary‐Scale Waves From the Troposphere Into the Thermosphere
Authors: Koval A. V. , Gavrilov N. M. , Pogoreltsev A. I. , Shevchuk N. O. 
Published: August 2018

AbstractIn this study, numerical simulations of planetary‐scale waves (PSWs), generated in the troposphere, were performed for altitudes from the Earth's surface up to 300 km. The influence of thermospheric effects of solar activity (SA) on the amplitudes and phases of westward traveling PSWs with zonal wave numbers 1 and 2 and periods 4–16 days propagating from the troposphere was simulated. Such simulations for a large number of PSW modes in the thermosphere were made for the first time. The effects of SA changes at altitudes above 100 km were involved in the general circulation model MUAM. The ionospheric conductivities for minimum and maximum SA levels were included into the MUAM. The simulation results were averaged over two ensembles of model runs with different PSW phases for conditions corresponding to the high and low SA levels for January–February. PSW atmospheric refractivity index and Eliassen‐Palm flux were calculated. They correspond to simulated changes in PSW amplitudes. Changes in the zonal velocity and temperature caused by the SA variations can modify spatial distributions of the westward traveling PSWs. Wave amplitudes significantly (up to 100%) decrease at the thermospheric heights under high SA, which is accompanied by decreasing vertical component of the Eliassen‐Palm flux. The 7‐, 10‐, and 16‐day PSWs could have larger partial reflection and worse propagation conditions than the 4‐ and 5‐day waves in the Southern Hemisphere under the high SA. At altitudes below 100 km, minor differences in zonal velocity and PSW amplitudes between high and low SA are found.