bluuebunny/crossref_metadata_2025 huggingface dataset:
Integration of IR‐808 Sensitized Upconversion Nanostructure and MoS2 Nanosheet for 808 nm NIR Light Triggered Phototherapy and Bioimaging
Authors: Xu Jiating , Gulzar Arif , Liu Yuhui , Bi Huiting , Gai Shili , Liu Bin , Yang Dan , He Fei , Yang Piaoping
Published: July 2017

Near infrared (NIR) light triggered phototherapy including photothermal therapy (PTT) and photodynamic therapy (PDT) affords superior outcome in cancer treatment. However, the reactive oxygen species (ROS) generated by NIR‐excited upconversion nanostructure is limited by the feeble upconverted light which cannot activate PDT agents efficiently. Here, an IR‐808 dye sensitized upconversion nanoparticle (UCNP) with a chlorin e6 (Ce6)‐functionalized silica layer is developed for PDT agent. The two booster effectors (dye‐sensitization and core–shell enhancement) synergistically amplify the upconversion efficiency, therefore achieving superbright visible emission under low 808 nm light excitation. The markedly amplified red light subsequently triggers the photosensitizer (Ce6) to produce large amount of ROS for efficient PDT. After the silica is endowed with positive surface, these PDT nanoparticles can be easily grafted on MoS2 nanosheet. As the optimal laser wavelength of UCNPs is consistent with that of MoS2 nanosheet for PTT, the invented nanoplatform generates both abundant ROS and local hyperthermia upon a single 808 nm laser irradiation. Both the in vitro and in vivo assays validate that the innovated nanostructure presents excellent cancer cell inhibition effectiveness by taking advantages of the synergistic PTT and PDT, simultaneously, posing trimodal (upconversion luminescence/computed tomography (CT)/magnetic resonance imaging (MRI) imaging capability.
High‐Modulus Low‐Cost Carbon Fibers from Polyethylene Enabled by Boron Catalyzed Graphitization
Authors: Barton Bryan E. , Behr Michael J. , Patton Jasson T. , Hukkanen Eric J. , Landes Brian G. , Wang Weijun , Horstman Nicholas , Rix James E. , Keane Denis , Weigand Steven , Spalding Mark , Derstine Chris
Published: July 2017

Currently, carbon fibers (CFs) from the solution spinning, air oxidation, and carbonization of polyacrylonitrile impose a lower price limit of ≈$10 per lb, limiting the growth in industrial and automotive markets. Polyethylene is a promising precursor to enable a high‐volume industrial grade CF as it is low cost, melt spinnable and has high carbon content. However, sulfonated polyethylene (SPE)‐derived CFs have thus far fallen short of the 200 GPa tensile modulus threshold for industrial applicability. Here, a graphitization process is presented catalyzed by the addition of boron that produces carbon fiber with >400 GPa tensile modulus at 2400 °C. Wide angle X‐ray diffraction collected during carbonization reveals that the presence of boron reduces the onset of graphitization by nearly 400 °C, beginning around 1200 °C. The B‐doped SPE‐CFs herein attain 200 GPa tensile modulus and 2.4 GPa tensile strength at the practical carbonization temperature of 1800 °C.
Homopolymer Nanolithography
Authors: Tebbe Moritz , Galati Elizabeth , Walker Gilbert C. , Kumacheva Eugenia
Published: July 2017

Future progress in nanoscience and nanotechnology necessitates further development of versatile, labor‐, and cost‐efficient surface patterning strategies. A new approach to nanopatterning is reported, which utilizes surface segregation of a smooth layer of an end‐grafted homopolymer in a poor solvent. The variation in polymer grafting density yields a range of surface nanostructures, including randomly organized pinned spherical micelles, worm‐like structures, networks, and porous films. The capability to use the polymer patterns for site‐specific deposition of small molecules, polymers, or nanoparticles is shown. This versatile strategy enables patterning of curved surfaces with direct access to the substrate and no need in changing polymer composition to realize different surface patterns.
Projector representation of isotropic linear elastic material laws for directed surfaces
Authors: Aßmus Marcus , Eisenträger Johanna , Altenbach Holm
Published: July 2017

In the framework of linear elasticity, it is possible to use eigenspace projectors to describe the elasticity tensor, at least for special cases of material symmetries. A similar procedure is also advantageous in the context of directed surfaces. It is thus possible to introduce this representation to stiffness measures of thin‐walled members. Hereby, we reduce our considerations to an elastic mid‐surface, where the in‐plane, out‐of‐plane, and transverse shear states are uncoupled, but superposed eventually. Thereby, we introduce a unique decomposition of the stiffness measures for the considered deformation states, while we limit our considerations to homogeneous materials without pronounced orientation dependency. For each of these three states, eigenvalues of the stiffness tensors are evaluated based on engineering material parameters. Finally, the whole procedure allows for the clear distinction of dilatoric and deviatoric portions in the constitutive equations.

After all, a compact and mathematically easy‐to‐handle representation for the stiffness tensors with respect to in‐plane, out‐of‐plane, and transverse shear state has been found. Thereby, we show correlations to classical representations as well as advantages due to the clarity of present scheme.
Short‐ and Long‐Term Outcomes in Malnourished Patients After Laparoscopic or Open Radical Gastrectomy
Authors: Zheng Hua‐Long , Lu Jun , Zheng Chao‐Hui , Li Ping , Xie Jian‐Wei , Wang Jia‐Bin , Lin Jian‐Xian , Chen Qi‐Yue , Lin Mi , Tu Ru‐Hong , Huang Chang‐Ming
Published: July 2017

Objective

The aim of this study was to compare the short‐ and long‐term outcomes of malnourished gastric cancer patients who underwent laparoscopic or open radical gastrectomy.

Background

Preoperative malnutrition is an independent risk factor for postoperative mortality and morbidity in major gastrointestinal surgery. However, whether laparoscopic surgery can improve the short‐ and long‐term outcomes of malnourished gastric cancer patients has not been determined.

Methods

We reviewed prospectively collected data from 2441 patients with gastric cancer between January 2009 and December 2014 and compared the short‐ and long‐term outcomes in malnourished gastric cancer patients who underwent laparoscopic or open radical gastrectomy. Nutritional risk factors included weight loss >10% within 6 months, body mass index <18.5 kg/m2, Subjective Global Assessment Grade C, and serum albumin <3.0 g/dL.

Results

Overall, 501 patients (20.52%) were classified as malnourished. Patients with gastric stump carcinoma, neoadjuvant chemotherapy, distant metastases, palliative operation, or the presence of other malignancies were excluded. Finally, a total of 412 patients were analyzed; 304 in the laparoscopic group and 108 in the open group. There were no significant differences between the two groups regarding the clinicopathological characteristics. However, the operation time (181 ± 53 vs. 253 ± 81 min), intraoperative blood loss (80 ± 116 vs. 322 ± 502 mL), time to first ambulation (2.21 ± 1.04 vs. 2.55 ± 1.50 days), liquid diet (4.91 ± 1.61 vs. 5.72 ± 2.09 days) and semiliquid diet (7.67 ± 1.56 vs. 9.53 ± 2.09 days) as well as the postoperative hospital stay duration (13.00 ± 6.56 vs. 15.22 ± 6.87 days) were significantly lower in the laparoscopic group than those in the open group (p < 0.05). The instances of overall complications (laparoscopic vs. open: 18.4 vs. 30.6%, p = 0.008) and pneumonia (laparoscopic vs. open: 10.9 vs. 19.4%, p = 0.023) were significantly lower in the laparoscopic group. With a median follow‐up of 31.0 months (range 1.0–88.0), the 3‐year overall survival (OS), recurrence‐free survival (RFS), and cancer‐specific survival (CSS) rates for the entire cohort were 58.9, 54.0 and 63.0%, respectively. Further analysis showed that the OS (57.5 vs. 59.4%, p = 0.560), RFS (51.8 vs. 54.8%, p = 0.441) and CSS (62.8 vs. 63.0%, p = 0.789) between the laparoscopic and open groups, respectively, were no significantly different. Further analysis showed no significant differences in the OS rates of the two groups of patients stratified by tumor stage (p > 0.05).

Conclusion

Compared with open radical gastrectomy, laparoscopy would reduce the postoperative complications especially pneumonia and shorten the postoperative hospital stay for patients with preoperative malnutrition without affecting their long‐term survival.
Influence of Heat Treatment on the Surface Structure of 6082 Al Alloys
Authors: Bayat N. , Carlberg T.
Published: July 2017

The β-Al5FeSi intermetallic phase and coarse Mg2Si particles have negative effects on extrudability and workability of 6xxx Al alloys billets. To achieve extruded products with a high surface quality, the as-cast billets are heat-treated before extrusion. During heat treatment, the undesired intermetallic particles, i.e., β-AlFeSi platelets are transformed to rounded α-Al(FeMn)Si intermetallic phases. Although the heat treatment of the bulk areas of the 6xxx Al alloys has been the focus of many previous studies, the process of phase transformation at the very surface has not been paid the same attention. In this study, microstructures of a homogenized billet of a 6082 alloy at the area very close to the surface were investigated. By comparing the X-ray diffraction patterns (XRD) of heat-treated samples as a function of different holding times, the gradual phase transformations could be followed, and using GDOES and map analysis by EDX, the alloying elemental redistribution was analyzed. Partial remelting and porosity growth was detected, and transformation rates were faster than in bulk material and from what is known from industrial processes.
Saying ‘Thank You’ to those whose thoughts really helped us forward
Authors: Leppink Jimmie
Published: July 2017

None
The Functional Barometer — An analysis of a self-assessment questionnaire with ICF-coding regarding functional/activity limitations and quality of life due to pain — Differences in age gender and origin of pain
Authors: Norrefalk Jan-Rickard , Borg Kristian
Published: July 2017

Long standing non-malignant pain leads to a variety of limitations which can be assessed by means of the self-assessment questionnaire Functional Barometer. It is designed to assess the extent and limitations in function, activity and decreased quality-of-life and is adapted to the International Classification of Functioning and Health.

Aim

To investigate the outcome and differences in age, gender and origin of pain in patients with longstanding non-malignant pain regarding the subjective experience of functional-, activity- and quality-of-life limitations.

Method

300 patients with a median duration of pain of 49 months referred to a Pain Management Centre filled out the Functional Barometer questionnaire, adapted to the International Classification of Functioning and Health.

Results

66% patients were women and 34% were men. Seventy-five percent were in working age, 18-64 years. The duration before being referred to a pain specialist was over 4 years and 65% reported pain from more than three origins. Significant differences in functioning, activity and quality-of-life were found in comparing gender, age and origin of pain. Men more often reported physiological limitations while women more often reported psychological limitations of functioning, activity and quality-of-life. The most important were that men more often had difficulties in walking and climbing stairs, while women reported problems with concentration, stress and psychological demands, family relations and contact with friends.

Conclusion

The significant differences regarding functioning, activity and quality-of-life between women and men as age and origin of pain must be taken into account when tailoring individual treatment and rehabilitation programmes.
Clinical outcome following anterior arthrodesis in patients with presumed sacroiliac joint pain
Authors: Nyström Bo , Gregebo Birgitta , Taube Adam , Almgren Stig-Olof , Schillberg Birgitta , Zhu Yingyan
Published: July 2017

Graphical Abstract
Public acceptance of coastal zone management efforts: The role of citizen preferences in the allocation of funds
Authors: Evans Keith S. , Noblet Caroline L. , Fox Emma , Bell Kathleen P. , Kaminski Abigail
Published: July 2017

We investigate allocation of funds by citizens across management options addressing impairments to coastal water quality. We study systematic variation in citizen allocation of funds to adaptive versus preventative strategies including the impact of referundum choices and test whether allocations will be impacted by cuing in the design of the referendum. Two key policy insights from our results: citizens who votenoon a water quality referendum have different preferences over allocating funds and providing cues to voters influenced allocation behavior. These results can assist decision makers in thinking about language used to communicate coastal water quality issues, particularly budget referenda.
An Economic Efficiency Approach to Reforming Corporate Governance: The Case of Multiple Stakeholder Boards
Authors: GOO Say H.
Published: July 2017

This paper points out the problems of the current law on directors’ duties that forces directors to ignore stakeholder interests, with the unintended consequences of misallocation of resources and the weaknesses of a traditional legal approach to law reform, and uses multiple stakeholder boards as an example to demonstrate how an economic efficiency approach to law reform, adopting economic principles, could avoid some of the unintended consequences of a legal approach to law reform and help design better rules that promote allocative efficiency for the benefit of society as a whole. It argues that international organizations should take the lead in promoting the use of stakeholder directors in the board of directors of multinational corporations that have a history of corporate abuses for corporate decisions that have an impact on all stakeholders.
Corporate Law Reform and the Political Environment: An Empirical Analysis Employing Public-Comment Procedure Data in Japan
Authors: MORITA Hatsuru
Published: July 2017

Corporate law shapes the fundamental business environment and affects various stakeholders. It is possible to determine the behaviour of various stakeholders by examining the politics of the reform process of corporate law. In order to understand the process, this paper uses the notice-and-comment procedure (public-comment procedure). Under this procedure, people submit comments to the Ministry of Justice; some of the comments are reflected in the final Bill, while others are not. The paper performs a quantitative analysis of a hand-collected dataset from two recent public-comment procedures on corporate law reform. The results showed that the bureaucrats are rigid and not willing to take public comments seriously. However, on some technical issues, legal academics, and legal professionals influence the behaviour of the bureaucrats. In addition, the bureaucrats employed these comments to honour the technical views of professionals. In other cases, corporate managers significantly influence the reform process.
A “Vortex of Identities”: Freemasonry, Witchcraft, and Postcolonial Homophobia
Authors: Geschiere Peter
Published: July 2017

The recent moral panic in Cameroon about a supposed proliferation of “homosexuality” is related to a special image of “the” homosexual asun Grandwho submits younger persons, eager to get a job, to anal penetration, and are thus corrupting the nation. This image stems from the popular conviction that the national elite is deeply involved in secret societies like Freemasonry or Rosicrucianism. The tendency to thus relate the supposed proliferation of homosexuality in the postcolony to colonial impositions is balanced by other lines in its genealogy—for instance, the notion of “wealth medicine,” which Günther Tessmann, the German ethnographer of the Fang, linked already in 1913 to same-sex intercourse. This complex knot of ideas and practices coming from different backgrounds can help us explore the urgent challenges that same-sex practices raise to African studies in general. The Cameroonian examples confuse current Western notions about heteronormativity, GLBTQI+ identities, and the relation between gender and sex. Taking everyday assemblages emerging from African contexts as our starting point can help not only to queer African studies, but also to Africanize queer studies. It can also help to overcome unproductive tendencies to oppose Western/colonial and local/ traditional elements. Present-day notions and practices of homosexuality and homophobia are products of long and tortuous histories at the interface of Africa and the West.
Gamunex® in Guillain-Barré Syndrome: A Postmarketing, Retrospective, Observational Study
Authors: Siddiqi Zaeem A. , Courtney Kecia , Hanna Kim , Mondou Elsa , Bril Vera
Published: July 2017

Background: The objective of this retrospective study was to evaluate the effectiveness and safety of Gamunex® (immune globulin [human] 10%; hereinafter “Gamunex”) when administered intravenously in the initial treatment of Guillain-Barré syndrome (GBS). The study was conducted as a postapproval commitment for Health Canada. Methods: A medical chart review for hospitalized patients diagnosed with GBS and treated with Gamunex (Gamunex 10% and IGIVnex® 10%; N=109; n=69 evaluable) was conducted at seven Canadian study centers in reverse chronological order. The primary endpoint for assessing effectiveness was the proportion of patients with treatment success compared with a prospectively defined historical effectiveness threshold for plasma exchange (PE) treatment (55.05%). Treatment success was assessed as ≥1 point improvement from baseline on the GBS Disability Scale or abbreviated GBS Disability Scale. Cases were not evaluable if treatment success, relapse, or treatment failure could not be determined by the available chart data. Results: Applying a conservative estimate with all nonevaluable patients (n= 40) classified as treatment failures, Gamunex treatment success was estimated at 57.8% (63 of 109 patients), which exceeded the predefined historical PE effectiveness threshold. In the evaluable population of this study, Gamunex treatment was successful in 91.3% of patients (63/69). Some 23 (21.1%) of 109 Gamunex-treated patients experienced ≥1 adverse event; the profile and frequency were consistent with the adverse events reported for Gamunex in the product’s labeling and with the natural clinical course of GBS. Conclusions: The effectiveness of Gamunex for treatment of GBS was comparable to PE therapy. Gamunex was observed to have an acceptable safety profile in this study population.
“We expect seniors to be able to prepare and recover from a cyclone as well as younger members of this community”: Emergency Management’s Expectations of Older Adults Residing in Aging, Remote Hamlets on Australia’s Cyclone-Prone Coastline
Authors: Astill Sandra , Miller Evonne
Published: July 2017

Objective

To investigate the extent to which older residents feel they can remain “self-reliant” during future natural disasters and to compare the findings with the viewpoints of local policy-makers and with those charged with caring for the elderly both on a day-to-day basis and in times of crisis.

Methods

This study used an array of non-probability snowballing techniques to seek the participation of senior citizens over the age of 65 years, emergency services officers, community health carers, and local government disaster managers located in aging, remote, coastal Australian communities vulnerable to cyclones and storm surges. All respondents participated in either a face-to-face personal interview or a focus group, with senior citizens also completing a self-administered questionnaire.

Results

This research found a discrepancy between policy expectations and the experiences of both the elderly and those who care for them, as well as a lack of understanding with regard to the term “self-reliant.”

Conclusions

These results highlight the inability of older adults in aging, remote, coastal Australian communities to remain “self-reliant” in the future, impacting both disaster management policies and the future capacity of these communities to remain resilient. (Disaster Med Public Health Preparedness. 2018;12:14–18)
An immersive virtual discrete choice experiment for elicitation of product aesthetics using Gestalt principles
Authors: Valencia-Romero Ambrosio , Lugo José E.
Published: July 2017

This research presents a pilot study that explores the use of quantified Gestalt principles of symmetry, parallelism, and continuity as design variables to evaluate the aesthetics of three-dimensional product representations. To this end, a virtual reality (VR)-based discrete choice experiment was conducted to elicit subjects’ preferences among pairs of bottle forms with diverse Gestalt values. While immersed in the VR environment, 42 participants were able to visually explore the whole forms, thus capturing more information to develop their judgment. Further analysis of the choice data using standard and mixed logit regression with hierarchical Bayes estimation provides initial details on the aesthetic utility of the Gestalt principles in question, their distribution among the sample participants, and the correlation between estimates. Due to the small sample size, the results are not expansible and they only apply to the data set gathered during the experiment. Nevertheless, it is an initial proof of concept which could suggest that symmetry and continuity have a positive aesthetic effect over people, and that parallelism could have opposite aesthetic utilities for women and men. This methodology allows designers to delve into the integration of aesthetics as a quantifiable property in the product development process.
The Obama administration’s conceptual change: Imminence and the legitimation of targeted killings
Authors: Trenta Luca
Published: July 2017

Starting in 2010, the Obama administration engaged in an effort to justify drone strikes relying on the concept of ‘imminence’. The aim of this article is to understand the reasons behind such insistence and to assess the administration’s efforts at conceptual change. Building on Skinner’s and Bentley’s work, the article argues that the administration has followed an ‘innovating ideologist’ strategy. The analysis shows how waves of criticisms exposed the administration to a key contradiction between its rhetoric of change that emphasised international law and the need for aggressive counterterrorism. Reacting to this criticism, the administration has relied on imminence due to its connection with legitimate uses of force, while working to change the criteria for the concept, causing a shift away from imminent as ‘immediate.’ Reassessing Skinner’s place in IR, the article identifies conceptual change as a lens to assess foreign policy rhetoric and practice. The analysis emphasises the connection between actors’ intentions, beliefs, and practices. It highlights the importance of criticism in engendering contradictions, exploring why only some criticisms are confronted. Finally, the article develops an original typology of the limits confronted by the innovating ideologist and methods to assess whether the actor has respected them.
A new method on diagnostics of muons produced by a short pulse laser
Authors: Zhang Feng , Li Boyuan , Shan Lianqiang , Zhang Bo , Hong Wei , Gu Yuqiu
Published: July 2017

Muons produced by a short pulse laser can serve as a new type of muon source having potential advantages of high intensity, small source emittance, short pulse duration and low cost. To validate it in experiments, a suitable muon diagnostics system is needed since high muon flux generated by a short pulse laser shot is always accompanied by high radiation background, which is quite different from cases in general muon researches. A detection system is proposed to distinguish muon signals from radiation background by measuring the muon lifetime. It is based on the scintillator detector with water and lead shields, in which water is used to adjust energies of muons stopped in the scintillator and lead to against radiation background. A Geant4 simulation on the performance of the detection system shows that efficiency up to 52% could be arrived for low-energy muons around 200 MeV and this efficiency decreases to 14% for high-energy muons above 1000 MeV. The simulation also shows that the muon lifetime can be derived properly by measuring attenuation of the scintilla light of electrons from muon decays inside the scintillator detector.
Variable-density mixing in turbulent jets with coflow
Authors: Charonko John J. , Prestridge Katherine
Published: July 2017

Two sets of experiments are performed to study variable-density effects in turbulent round jets with coflow at density ratios, $s=4.2$ and $s=1.2$. Ten thousand instantaneous realisations of simultaneous two-dimensional particle image velocimetry and planar laser-induced fluorescence at three axial locations in the momentum-dominated region of the jet allow us to calculate the full turbulent kinetic energy (t.k.e.) budgets, providing insights into the mechanisms of density fluctuation correlations both axially and radially in a non-Boussinesq flow. The strongest variable-density effects are observed within the velocity half-width of the jet, $r_{\tilde{u} _{1/2}}$. Variable-density effects decrease the Reynolds stresses via increased turbulent mass flux in the heavy jet, as shown by previous jet centreline measurements. Radial profiles of turbulent flux show that in the lighter jet t.k.e. is moving away from the centreline, while in the heavy jet it is being transported both inwards towards the centreline and radially outwards. Negative t.k.e. production is observed in the heavy jet, and we demonstrate that this is caused by both reduced gradient stretching in the axial direction and increased turbulent mass fluxes. Large differences in advection are also observed between the two jets. The air jet has higher total advection caused by strong axial components, while density fluctuations in the heavy jet reduce the axial advection significantly. The budget mechanisms in the non-Boussinesq regime are best understood using effective density and velocity half-width, $\unicode[STIX]{x1D70C}_{eff}\bar{u}_{1,CL}^{3}/r_{\tilde{u} _{1/2,eff}}$, a modification of previous scaling.
Pattern selection in ternary mushy layers
Authors: Guba Peter , Anderson Daniel M.
Published: July 2017

We consider finite-amplitude convection in a mushy layer during the primary solidification of a ternary alloy. Previous linear stability theories applied to ternary alloy primary-solidification models have identified an exceptional class of direct convective instability when all the individual stratifying agencies (one thermal and two solutal) were statically stabilizing. A reduced model, in which the effects of latent heat, solute rejection and background solidification are neglected, contains the essential interactions that admit qualitatively the same instability. We examine pattern selection for steady convection in this model. We find that roll, square or hexagonal convection patterns can be nonlinearly stable, depending on the relative importance of a number of physical effects, namely the solutal diffusion rates, the liquidus slopes and the background thermal and solutal density stratifications. The results for a special case are found to isolate a purely double-diffusive phase-change mechanism of pattern selection. Subcritical behaviour is identified inside the domain of individual static stability. A physical system is proposed that may be a promising one in which to experimentally identify these novel instabilities.
Numerical study of a planar shock interacting with a cylindrical water column embedded with an air cavity
Authors: Xiang Gaoming , Wang Bing
Published: July 2017

This paper performs a numerical study on the interaction of a planar shock wave with a water column embedded with/without a cavity of different sizes at high Weber numbers. The conservative-type Euler and non-conservative scalar two-equations representing the transportation of two-phase properties consist of the diffusion interface capture models. The numerical fluxes are computed by the Godunov-type Harten-Lax–van Leer contact Riemann solver coupled with an incremental fifth-order weighted essentially non-oscillatory (WENO) scheme. A third-order total variation diminishing (TVD) Runge–Kutta scheme is used to advance the solution in time. The morphology and dynamical characteristics are analysed qualitatively and quantitatively to demonstrate the breakup mechanism of the water column and formation of transverse jets under different incident shock intensities and embedded-cavity sizes. The jet tip velocities are extracted by analysing the interface evolution. The liquid column is prone to aerodynamic breakup with the formation of micro-mist at later stages instead of liquid evaporation because of the weakly heating effects of the surrounding air. It is numerically confirmed that the liquid-phase pressure will drop below the saturated vapour pressure, and the low pressure can be sustained for a certain time because of the focusing of the expansion wave, which accounts for the cavitation inside the liquid water column. The geometrical parameters of the deformed water column are identified, showing that the centreline width decreases but the transverse height increases nonlinearly with time. The deformation rates are nonlinearly correlated under different Mach numbers. The first transverse jet is found for a water column with an embedded cavity, whereas the water hammer shock and second jet do not occur under the impact of low intensity incident shock waves. The $x$-velocity component recorded at the rear stagnation point can remain unchanged for a comparable time after a declined evolution, which indicates that the downstream wall of the shocked water ring somehow moves uniformly. It can be explained that the acceleration of the downstream wall is balanced by the trailing shedding vortex, and this effect is more evident under higher Mach numbers. The increased enstrophy, mainly generated at the interface, demonstrates the competition of the baroclinic effects of the shock wave impact over dilatation.
Instabilities in flexible channel flow with large external pressure
Authors: Stewart Peter S.
Published: July 2017

We examine the stability of laminar high-Reynolds-number flow through an asymmetric flexible-walled channel driven by a fixed upstream flux and subject to a (large) uniform external pressure. We construct a long-wavelength, spatially one-dimensional model using a flow profile assumption, modelling the flexible wall as a thin tensioned membrane subject to a large axial pre-stress. We numerically construct the non-uniform static shape of the flexible wall and consider its stability using both a global eigensolver and numerical simulation of the nonlinear governing equations. The system admits multiple static solutions, including a highly collapsed steady state where the membrane has a single constriction which increases with increasing external pressure. We demonstrate that the non-uniform static state is unstable to two distinct (infinite) families of normal modes which we characterise in the limit of large external pressure. In particular, there is a family of low-frequency oscillatory modes which each persist to low membrane tensions, where the most unstable mode has an oscillating membrane profile which is outwardly bulged at the centre of the domain with a narrow constriction at the downstream end. In addition, there is a family of high-frequency oscillatory modes which are each unstable beyond a critical value of the tension within a two-branch neutral curve. Unstable modes along the lower branch of the neutral curve are sustained by a leading-order balance between unsteady inertia and the restoring force of membrane tension along the channel. In addition, we elucidate the mechanism of energy transfer to sustain the self-excited oscillations: oscillations decrease the mean maximal constriction of the channel over a period, which reduces the overall dissipation of the mean flow and releases energy to sustain the instability. Fully nonlinear simulations indicate that as the Reynolds number increases these unstable normal modes can grow supercritically into sustained large-amplitude ‘slamming’ oscillations, where the membrane is periodically drawn very close to the opposite rigid wall before recovering.
Thinking Outside the Circle: Reflections on Theory and Methods for School-Based Garden Research
Authors: Clague Liesa , Harrison Neil , Stewart Katherine , Atkinson Caroline
Published: July 2017

School-based gardens (SBGs) are contributing to improvements in many areas of education, including nutrition, health, connectedness and engagement of students. While considerable research has been conducted in other parts of the world, research in Australia provides limited understanding of the impact of SBGs. The aim of this paper is to give a reflective viewpoint on the impact of SBGs in Australia from the perspective of an Aboriginal philosophical approach called Dadirri. The philosophy highlights an Australian Aboriginal concept, which exists but has different meanings across Aboriginal language groups. This approach describes the processes of deep and respectful listening. The study uses photovoice as a medium to engage students to become researchers in their own right. Using this methodology, students have control over how they report what is significant to them. The use of photovoice as a data collection method is contextualised within the Aboriginal philosophical approach to deep listening. For the first author, an Aboriginal researcher (Clague), the journey is to find a research process that maintains cultural integrity and resonates with the participants by affirming that a culturally sensitive approach to learning is important.
Study of Flux Limiters to Minimize the Numerical Dissipation Based on Entropy-Consistent Scheme
Authors: Ren J. , Wang G. , Feng J. H. , Ma M. S.
Published: July 2017

The use of limiters may impact both accuracy and resolution of a solution. And the accuracy and resolution are highly dependent on the amount of numerical dissipation in a scheme, so the ability of limiters to control numerical dissipation should be improved. In this view, based on the examination of several classical limiters to control dissipation, a class of general piecewise-linear flux limiters (termed GPL limiters) are presented in this paper for Multi-step time-space-separated unsteady schemes. The GPL limiters can satisfy the second-order TVD criterion and contain some existing limiters such as Superbee and Minmod. Using the decrement of discrete total entropy to represent the amount of numerical dissipation, an entropy dissipation function of GPL limiters is defined with three parameter variables. By proving the monotonicity of this function, a new GPL type limiter (named MDF individually), which can minimize the numerical dissipation and improve the calculation accuracy, is proposed. A high resolution entropy-consistent scheme is obtained by MDF limiter, which will be proved to satisfy entropy stability and entropy consistency. Computational results of this scheme for several 1-D and 2-D Euler test cases are presented, demonstrating the accuracy, monotonicity and robustness of MDF limiter.
Effects of matrix on plasma levels of EPA and DHA in dogs
Authors: Goffin Kay , van Maris Marc , Corbee Ronald J.
Published: July 2017

EPA and DHA are often used in veterinary medicine due to their beneficial effects for several medical conditions such as osteoarthritis. EPA and DHA are administered to dogs through different matrices. The aim of the present study was to determine the effects on the plasma levels in dogs caused by various matrices for EPA and DHA administration. In this study, three differentn-3 PUFA formulations were used: soft chew tablet (CCx); liquid fish oil (LFO); and enriched kibbles (EK). The formulations were administered single-dose and compared in a randomised, cross-over designed study with a 1-week wash-out period. Several variables were observed after the administration of these formulations in thirteen dogs: the NEFA plasma concentration, the AUC for 1 d (AUC0–24 h), and maximum plasma concentration for both EPA and DHA. All plasma fatty acid levels reached baseline levels within 72 h. CCx (median = 2·987) had a significantly lower AUC0–24 h for EPA compared with LFO (median = 5·647,P = 0·043) and EK (median = 5·119,P = 0·032) (F2,22 = 4·637,P = 0·021). CCx (median = 2·471) AUC0–24 h for DHA was significantly lower compared with LFO (median = 4·837,Z = −2·56,P = 0·011) and EK (median = 4·413,Z = −2·59,P = 0·01). EPA and DHA plasma levels were affected by matrix, as with the CCx, the AUC0–24 h of EPA and DHA were both lower compared with LFO and EK. The effect of matrix on bioavailability is important for product development as well as for clinical trials studying effects of EPA and DHA.
How Chinese Officials Use the Internet to Construct Their Public Image
Authors: Pan Jennifer
Published: July 2017

The Chinese regime has launched a number of online government transparency initiatives to increase the volume of publicly available information about the activities of lower-level governments. By analyzing online content produced by local government officials to fulfill these transparency requirements—a random sample of 1.92 million county-level government web pages—this paper shows how websites are commandeered by local-level officials to construct their public image. The majority of content on government websites emphasizes either the competence or benevolence of county executives, depending on where leaders are in the political tenure cycle. Early tenure county executives project images of benevolence by emphasizing their attentiveness and concern toward citizens. Late tenure executives project images of competence by highlighting their achievements. These findings shift the nature of debates concerning the role of the Internet in authoritarian regimes from a focus on regime–society interactions to an examination of dynamics among regime insiders. By focusing on communication and the flow of information between upper-level leaders and lower-level regime agents, this paper reveals how the Internet becomes a vehicle of self-promotion for local politicians.
Component age estimates for the Hell Gap Paleoindian site and methods for chronological modeling of stratified open sites
Authors: Pelton Spencer R. , Kornfeld Marcel , Lou Larson Mary , Minckley Thomas
Published: July 2017

The Hell Gap National Historic Landmark, located on the northwestern plains of Wyoming, is one of the most important Paleoindian archaeological sites in North America because it contains a stratified sequence of occupations spanning nearly the entirety of the Paleoindian period. Although Hell Gap is central to archaeological knowledge concerning North American Paleoindian chronology, consistently assigning component ages has been problematic due to conflicting radiocarbon determinations from individual strata, stratigraphic age reversals in age-depth relationships, and other issues related to the stratified open campsite. Toward resolving the Hell Gap chronology, we devised a procedure for correcting age-depth relationships for incorporation in chronostratigraphic models and then used the Bayesian age-depth modeling qprocedures in Bchron to estimate the ages of 11 stratified components present at Hell Gap Locality 1. We present these age estimates and discuss their significance to Paleoindian chronology. Notable aspects of our chronology include a revised age estimate for the Goshen complex, the identification of three Folsom components spanning the entirety of the Folsom temporal range, and relatively young age estimates for the Late Paleoindian Frederick/Lusk component(s) at Locality 1. More broadly, our study demonstrates a procedure for creating chronometric models of stratigraphically complicated open stratified sites of any type.
Early nutritional intervention can improve utilisation of vegetable-based diets in diploid and triploid Atlantic salmon (Salmo salarL.)
Authors: Clarkson Michael , Migaud Herve , Metochis Christoforos , Vera Luisa M. , Leeming Daniel , Tocher Douglas R. , Taylor John F.
Published: July 2017

The present study investigated nutritional programming in Atlantic salmon to improve utilisation of a vegetable-based diet. At first exogenous feeding, fry were fed either a marine-based diet (Diet Mstimulus, 80% fishmeal (FM)/4% fish oil (FO)) or a vegetable-based diet (Diet Vstimulus, 10% FM/0% FO) for 3 weeks. Subsequently, all fish were then fed under the same conditions with a commercial, marine-based, diet for 15 weeks and thereafter challenged with a second V diet (Diet Vchallenge, 10% FM/0% FO) for 6 weeks. Diploid and triploid siblings were run in parallel to examine ploidy effects. Growth performance, feed intake, nutrient utilisation and intestinal morphology were monitored. Fish initially given Diet Vstimulus(V-fish) showed 24 % higher growth rate and 23 % better feed efficiency compared with M-fish when later challenged with Diet Vchallenge. There was no difference in feed intake between nutritional histories, but increased nutrient retentions highlighted the improved utilisation of a V diet in V-fish. There were generally few significant effects of nutritional history or ploidy on enteritis scores in the distal intestine after the challenge phase as only V-triploids showed a significant increase (P<0·05) in total score. The data highlighted that the positive effects were most likely a result of nutritional programming and the ability to respond better when challenged later in life may be attributed to physiological and/or metabolic changes induced by the stimulus. This novel study showed the potential of nutritional programming to improve the use of plant raw material ingredients in feeds for Atlantic salmon.
PROTAGORAS’ GREAT SPEECH
Authors: Nathan A.R.
Published: July 2017

This article seeks to present a detailed textual analysis of Protagoras’ Great Speech in Plato'sProtagoras(320c–328d). I will argue that the concept of ἀρετή (‘excellence’ or ‘virtue’) as it appears in the Great Speech is whittled down to a vague notion of civic duty. In this respect, Protagoras is bringing himself in line with the democracy, but in doing so the ἀρετή he claims to teach loses much of its initial appeal, particularly in the eyes of his aristocratic clientele. Nevertheless, if thecontentof Protagoras’ Great Speech overlooks the abilities required to rise to political prominence, theformmost assuredly does not. As one would expect from Plato's Protagoras, his speech is replete with just that oratorical prowess his students might expect to acquire from him. This, in turn, has a number of interesting and important implications in the broader context of theProtagoras, in particular regarding the contrast or conflict between long speeches and short-answer dialectic. Moreover, although it has long been noticed that Protagoras neglects rhetoric and personal pre-eminence in his account, as far as I know there has not been any serious attempt to analyse the stylistic aspects of this masterful speech. Accordingly, both this and (to a large extent) my attempt to interpret it within the economy of the dialogue are original.
TANNINS IN GOAT DIETS MODIFY MANURE TURNOVER IN A SUBTROPICAL SOIL
Authors: INGOLD MARIKO , SCHMIDT SASKIA , DIETZ HERBERT , JOERGENSEN RAINER GEORG , SCHLECHT EVA , BUERKERT ANDREAS
Published: July 2017

Quality of animal manure as a nutrient source for crops and as a soil conditioner depends on how fast the organic matter is decomposed, releasing plant nutrients or building up the soil organic matter (SOM) pool. This turnover process is governed by manure composition, soil temperature, soil moisture and secondary metabolites in the manure such as tannins. To investigate the turnover and nutrient release from tannin-containing manure, a litterbag experiment was conducted in an irrigated lowland soil of northern Oman. A standardized quebracho tannin extract (QT) was either added to the goats’ diet and defecated with manure (QTf), or added to manure in a QT water suspension (QTc) prior to field application. Litterbags were installed within a two-year field experiment at 10-cm depth at the beginning of a consecutive sweet corn and radish cultivation, followed by their recovery every 2-–6 weeks until crop harvests. The litterbags contained pure goat manure (control) and the two types of QT-amended goat manure. Generally, QT increased OM remaining in litterbags at sampling by up to 22% compared with the control. QT reduced relative C, N, P and K release by 10% to 63% compared with the control, but effects were contradictory under sweet corn and radish. While under radish, both QT treatments reduced or tended to reduce C, N, P and K release from manure, QTc even increased N and P release under sweet corn. QTf, on the other hand, did not affect C, P and K release under sweet corn, whereas N release was reduced by 36–63% under both crops. As quebracho tannins in goat manure slowed down organic matter decomposition and reduced nutrient release, they may be useful agents in manure application to increase SOM pools and soil nutrient pools. However, the immobilization particularly of N by tannins can reduce the availability of this nutrient to crops.
A fungal endophyte consortium counterbalances the negative effects of reduced nitrogen input on the yield of field-grown spring barley
Authors: MURPHY B. R. , HODKINSON T. R. , DOOHAN F. M.
Published: July 2017

The use of chemicals to fertilize crops incurs economic and environmental costs and it is widely recognized that the current level of chemical fertilizer use is unsustainable in many intensive farming systems. Any methods that can reduce fertilizer input and still maintain acceptable yields would be of great benefit to both the farmer and the environment. The use of beneficial endophytes as crop inoculants may go some way towards improving crop yields beyond that achievable using fertilizer increases alone. Field trials were conducted over two seasons on three contrasting field sites to test the effects of fungal endophytes from a wild barley relative on three barley cultivars (Mickle, Planet and Propino). Seeds were either untreated or dressed with a consortium of four endophyte strains, and three levels of nitrogen (N) were applied to both treatments: full N, 50% N and 0 N. On the field site with the lowest overall N input, the endophyte treatment with 50% N restored yield for ‘Planet’ to that associated with untreated plants receiving the full N input. On the same site and with the same cultivar, endophyte treatment increased yield by 15% under full N, and by a mean 12% for all three cultivars with 50% N input. Over both seasons and all three sites, the endophyte treatment increased yield for the cultivar Planet by a mean of 9%. For the endophyte-associated increase in the variety Planet grain yield over the untreated trials strong correlations were found between increased yield and each of low rainfall, greater evaporation and greater number of degree days above the base. Furthermore, the efficacy of the endophytes was not removed by regular foliar fungicidal treatment. These results suggest that fungal endophytes can contribute to improving barley yield grown in low rainfall areas and under a range of fertilizer input regimes, provided that endophyte treatments are applied to compatible crop cultivars and sites.