bluuebunny/crossref_metadata_2025_split huggingface dataset:
Biological control in Uruguay.
Authors: Basso C. , Ribeiro A. , Cibils X. , Chiaravalle W. , Punschke K. 
Published: December 2019

Abstract

The first reported case of biological control in Uruguay was an attempt to import the parasitoid Encarsia berlesei from Italy to manage the white peach scale in 1912, which failed due to high mortality during the long boat trip. Later introduction of the same parasitoid (in 1913) and the predator Lindorus lophanthae (in 1915) resulted in permanent control of peach scale. In the early 20th century, Uruguay was a pioneer in South America in the successful introduction of natural enemies of pests recently arrived in the country and was also a provider of biocontrol agents to other countries in the region by re-exporting these exotic species. Throughout this century the introduction and colonization of biocontrol agents continued. In the 1980s and 1990s, national production of entomopathogens and parasitoids was initiated. During this period (and until today), large-scale prospecting projects were executed to find and identify native natural enemies and microbial control agents in several important crops. The largest areas under classical biocontrol are currently in pine and eucalyptus plantations. Recently, government regulations for the registration and control of biocontrol products have been established in Uruguay. The first commercial biocontrol products on the market are used to manage pests in horticultural crops in greenhouses and for field crops such as soybeans, intended for local consumption and for export. Uruguay aspires to be recognized for the production of high-quality food. Biocontrol helps to realize this aspiration, because it contributes to food safety and adds to environmental protection.
Sweet potato: breeding and genetics.
Authors: Lebot V. 
Published: December 2019

Abstract

This chapter focuses on the various objectives and selection criteria that need to be addressed for the success of sweet potato breeding. Information on the sexual reproduction, incompatibility and sterility, crossing techniques and true seed production, selection methods and programmes, heritability of major traits, genotype environment interactions, use of related species, use of molecular markers, transgenic technologies and germplasm conservation of sweet potato are also discussed.
Hydromagnetic Carreau Nanoliquid in Frames of Dissipation and Activation Energy
Authors: Waqas M. , Naz Saira , Hayat T. , Ijaz Khan M. , Alsaedi A. 
Published: December 2019

Abstract

The novel characteristics of magnetic field and entropy generation in mixed convective flow of Carreau fluid towards a stretched surface are investigated. Buongiornio nanoliquid model consists of thermophoresis and Brownian movement aspects is opted for analysis. Energy expression is modeled subject to thermal radiation and viscous dissipation phenomenon. Concentration by zero mass flux condition is implemented. Consideration of chemical reaction and activation energy characterizes the mass transfer mechanism. Total entropy generation rate and Bejan number is formulated. The utilization of transformation variables reduces the PDEs into non-linear ODEs. The obtained nonlinear complex problems are computed numerically through Shooting scheme. The impact of involved variables like local Weissenberg number, magnetic parameter, thermal radiation parameter, Brownian motion parameter, thermophoresis parameter, buoyancy ratio parameter, mixed convection parameter, Prandtl parameter, Eckert number, Schmidt number, non-dimensional activation energy parameter, chemical reaction parameter, Brinkman number, dimensionless concentration ratio variable, diffusive variable and dimensionless temperature ratio variable on velocity, temperature, nanoparticles concentration, entropy generation, Bejan number, surface drag force and heat transfer rate are examined through graphs and tables.
Uncertainty Relations for Coherence*
Authors: Luo Shun-Long , Sun Yuan 
Published: December 2019

Abstract

Quantum mechanical uncertainty relations are fundamental consequences of the incompatible nature of noncommuting observables. In terms of the coherence measure based on the Wigner-Yanase skew information, we establish several uncertainty relations for coherence with respect to von Neumann measurements, mutually unbiased bases (MUBs), and general symmetric informationally complete positive operator valued measurements (SIC-POVMs), respectively. Since coherence is intimately connected with quantum uncertainties, the obtained uncertainty relations are of intrinsically quantum nature, in contrast to the conventional uncertainty relations expressed in terms of variance, which are of hybrid nature (mixing both classical and quantum uncertainties). From a dual viewpoint, we also derive some uncertainty relations for coherence of quantum states with respect to a fixed measurement. In particular, it is shown that if the density operators representing the quantum states do not commute, then there is no measurement (reference basis) such that the coherence of these states can be simultaneously small.
Parameterized Post-Post-Newtonian Light Propagation in the Field of One Spherically-Symmetric Body*
Authors: Zhu Xiao-Yan , Yang Bo , Jiang Chun-Hua , Lin Wen-Bin 
Published: December 2019

Abstract
We derive a more generally parameterized post-post-Newtonian solution for the light propagation in the gravitational field of one spherically-symmetric body. Based on the solution for the light velocity, we give the formula of the light deflection when both the emitter and receiver are located in the regions far away from the body, which is the most important scenario in the real applications. Our results can be applied to more metric theories of gravitation.
Relativistic Self-Focusing of Hermite-cosh-Gaussian Laser Beam in Magnetoplasma with Exponential Plasma Density Ramp
Authors: Kant Niti , Vij Shivani , Chakravarti Sudarshan Kumar , Kushwaha Juleshwar Prasad , Thakur Vishal 
Published: December 2019

Abstract
In the present manuscript, we analyse the effect of exponential plasma density ramp for relativistic self-focusing of Hermite-cosh-Gaussian laser pulse in magnetoplasma. The exponential plasma density ramp is found to be more prominent in achieving the stronger self-focusing of Hermite-cosh-Gaussian laser beam in comparison to the tangential plasma density ramp. We propose a theoretical model for propagation of Hermite-cosh-Gaussian laser pulse in magnetoplasma with exponential density ramp. The nonlinearity in the medium arises because of the relativistic motion of electrons, being responsible for relativistic self-focusing. Equation of the beam width parameter is set up by taking the expression for the dielectric function and following Wentzel-Kramers-Brillouin (WKB) with paraxial ray approximations for mode indices m = 0, 1 and 2. Effect of decentered parameter is also analysed, which results in stronger self-focusing of the Hermite-cosh-Gaussian laser beam. Stronger self-focusing of laser beam is more pronounced in high density plasma with higher magnetic field.
The Effects of Wettability on Primary Vortex and Secondary Flow in Three-Dimensional Rotating Fluid*
Authors: Zhou Si-Hao , Qiu Wen , Ye Yong , He Bing , Wen Bing-Hai 
Published: December 2019

Abstract

The secondary flow driven by the primary vortex in a cylinder, generating the so called “tea leaf paradox”, is fundamental for understanding many natural phenomena, industrial applications and scientific researches. In this work, the effect of wettability on the primary vortex and secondary flow is investigated by the three-dimensional multiphase lattice Boltzmann method based on a chemical potential. We find that the surface wettability strongly affects the shape of the primary vortex. With the increase of the contact angle of the cylinder, the sectional plane of the primary vortex gradually changes from a steep valley into a saddle with two raised parts. Because the surface friction is reduced correspondingly, the core of the secondary vortex moves to the centerline of the cylinder and the vortex intensity also increases. The stirring force has stronger effects to enhance the secondary flow and push the vortex up than the surface wettability. Interestingly, a small secondary vortex is discovered near the three-phase contact line when the surface has a moderate wettability, owing to the interaction between the secondary flow and the curved gas/liquid interface.
Numerical study of ubiquitous modes in tokamak plasmas in the presence of impurities
Authors: Shen Yong , Dong Jiaqi , Peng Xiaodong , Li Jia , Han Mingkun 
Published: December 2019

Abstract
As an important branch of trapped electron modes (TEMs), the ubiquitous mode (UM) is a favored subject for the investigation of anomalous energy losses in magnetic fusion plasmas. In this paper, the numerical study of UMs was carried out in tokamak plasmas in the presence of impurities. The physical model and the gyrokinetic equations for TEM (and UM) instability is introduced, including the impurity effect. The numerical results show that impurity species impose significant impacts on the UM instability in many ways, one of which is that impurity effect on UMs is generally stabilizing, and on the whole the stabilizing effect is most pronounced for the case of −0.8 ≲ L
ez < 0 (

L

ez

≡

L

n
e

/

L

n
z

,

with

L

n
s

=
−

∂

ln

n

s

/
∂
r

−
1

). As the impurity charge concentration

f

z

increases, or for the heavier or lower-ionized impurity ions, the UM instability is weaker. Compared to the ion and electron temperature gradient effects, impurity temperature gradient (expressed by

η

z

=

L

nz

/

L

Tz

) has only a minor effect, while the ratio of electron to impurity temperature

τ

z

has a relatively larger effect on UMs, embodied in the mode linear growth rates and instability windows. The investigation of wavenumber threshold for UM showed that the mode was a fluid-like instability when

b

i

≡

1
2

k

θ

2

ρ

s

2

∼

n
/

n

e
T

3

,

and the presence of impurity resulted in the modification of the UM instability window. By surveying the parametric dependences of UMs in the presence of impurities, it is revealed that comparatively, the stabilizing effects of impurity is more pronounced in the regime of larger wavenumber, while the weakening effects of (i) decreasing the fraction of trapped electrons, (ii) increasing the magnetic shear, or (iii) decreasing the electron density gradient on UM instability are relatively more pronounced in the regime of smaller wavenumber. It also indicates that the stabilizing effect of impurity on UMs is owing to the non-resonant mechanism of the UM.
Creutz ladder in a resonantly shaken 1D optical lattice
Authors: Kang Jin Hyoun , Han Jeong Ho , Shin Y 
Published: December 2019

Abstract
We report the experimental realization of a Creutz ladder for ultracold fermionic atoms in a resonantly driven 1D optical lattice. The two-leg ladder consists of the two lowest orbital states of the optical lattice and the cross inter-leg links are generated via two-photon resonant coupling between the orbitals by periodic lattice shaking. The characteristic pseudo-spin winding structure in the energy bands of the ladder system is demonstrated using momentum-resolved Ramsey-type interferometric measurements. We discuss a two-tone driving method to extend the inter-leg link control and propose a topological charge pumping scheme for the Creutz ladder system.
Control of neoclassical tearing mode by synergetic effects of resonant magnetic perturbation and electron cyclotron current drive in reversed magnetic shear tokamak plasmas
Authors: Tang Weikang , Wang Zheng-Xiong , Wei Lai , Wang Jialei , Lu Shuangshuang 
Published: December 2019

Abstract
Synergetic effects of resonant magnetic perturbation (RMP) and electron cyclotron current drive (ECCD) on stabilizing neoclassical tearing mode (NTM) in reversed magnetic shear (RMS) tokamak plasmas are numerically investigated based on a set of reduced MHD equations. For the moderate separation, it is found that the explosive burst induced by the fast reconnection of double tearing mode (DTM) in the RMS configuration can be completely suppressed by externally applied RMPs. Zonal flows with strong shear induced by a rotating RMP play an important role in this suppression process. Moreover, turning on ECCD in advance is essential to mitigate the NTM. For the large separation without the explosive burst, two strategies, i.e. a continuous ECCD with static RMP and a modulated ECCD with rotating RMP, are separately investigated. It is shown that when the NTM is decelerated by a relatively slow rotating RMP, the modulated ECCD can have a better stabilizing effect. In addition, the ECCD deposition widths in both radial and helical angle directions, as well as the ECCD on-duty time, are analyzed in detail. The best effectiveness of ECCD is obtained and the relevant physical mechanisms are discussed.
Analysis of shear failure process of jointed rock
Authors: Ke Changren , He Tingting , Wen Qingwei 
Published: December 2019

Abstract
Based on regular sawtooth joint specimens with four fluctuating angles, the shear tests under five normal stresses were carried out to get the test curve. The shear stress-shear displacement curves and different failure modes of joints were analyzed. The law of shear strength weakening stage was studied by using shear strength weakening ratio. It was concluded that when the normal stress is small and the undulation angle is large, the value of shear strength weakening ratio is larger, and it has a good linear relationship with the undulation angle.
The Theoretical Model And Numerical Solution Of Heat Flow Coupling Considering Fractal Characteristics Of Rock Fractures
Authors: Xu Xiaochen , Zheng Qiwen , Dai Chunhua , Li Hongqiang , Gao Shang 
Published: December 2019

Abstract
In order to analyze the temperature distribution law in rough fissured rock mass more truly, the fractal dimension of fractal theory is used to make statistics on the roughness of fissured surface, and a heat flow coupling theoretical model considering the fractal characteristics of fissured surface of rock mass is established. By building a geometric model containing rough fissured surface and numerical simulation by software, the more real temperature distribution law in rough fissured rock mass is analyzed. The simulation results show that the temperature distribution in rough fissured rock mass appears channeling phenomenon, and convection plays a leading role in the temperature distribution, and the existence of fissured seepage leads to a relatively low temperature zone in the rock mass.
Suitability Evaluation of Land Reclamation——Taking the Project Area of Baoguo Old Town in Beipiao City as an Example
Authors: Li Qi , Biao Peng 
Published: December 2019

Abstract
The evaluation of land reclamation suitability can predict the damaged land and it is of great significance in determining the best direction of land reclamation. Taking the abandoned land of Laojiao old town in Beipiao City as an example, this study selects the evaluation factors and establishes the evaluation index system based on the actual research situation. The evaluation results show that the drainage conditions in the project area are good, of which 36.6367hm2 is suitable for reclamation as cultivated land; 31.5327hm2 is suitable for reclamation as forest land.
Detection of mercuric ion in water environment based on luminescent metal–organic frameworks
Authors: Luo Yixun 
Published: December 2019

Abstract
Luminescent metal-organic framework (LMOF), as a class of metal-organic framework (MOF), is a novel class of porous material formed from metal ion and bridging organic ligands. Its unique structural and chemical properties have enabled us to reliably detect mercury ions, one of the most toxic contaminants in the environment. Additionally, the luminescence of LMOFs has made the detection process ever more convenient. In this paper, we pay attention on the change of luminescent intensity of these materials in the presence of Hg2+. We focus on several key publications in this area, including examples of LMOFs with excellent performance on Hg2+ detection, and we expect this review will provide new guidelines for Hg2+sensor engineering.
Effects of temperature on lignocellulosic wastes hydrolysis and volatile fatty acids accumulation under neutral and strongly alkaline conditions
Authors: Wang Xinze , Guo Wenrui , Wen Yue 
Published: December 2019

Abstract
The volatile fatty acids (VFAs) produced in the process of wetland plant litter (WPL) anaerobic digestion could be used as external carbon sources to enhance the removal efficiencies of oxidized contaminants in constructed wetlands. In this study, the effects of temperature on WPL hydrolysis and VFAs accumulation under neutral and strongly alkaline conditions were explored. In neutral (pH 7.0) fermentation, biotic factors were the leading reasons for WPL hydrolysis, and the maximal SCOD accumulation (2467 mg L-1) occurred at 35 °C with a fermentation time of 20 days. In strongly alkaline (pH 12.0) fermentation, abiotic factors were the leading reasons for WPL hydrolysis, and SCOD concentrations increased with temperature at a given fermentation time. Further investigation showed that biotic release of carbohydrate was more sensitive to temperature change than abiotic release. 25 °C was the optimal temperature for biotic release of carbohydrate, while abiotic release of carbohydrate slightly increased with temperature. From the results of linear regression, strong positive correlation was observed between VFAs production and the total release of carbohydrate. The optimal temperatures for VFAs accumulation under neutral and strongly alkaline conditions were respectively 35 and 25 °C, both with a fermentation time of 20 days, and the VFAs concentrations were respectively 1890.1 mg COD L-1 and 1276.4 mg COD L-1. VFAs produced in all fermentations consisted of acetic, propionic, iso-butyric, n-butyric, iso-valeric and n-valeric acids, with acetic acid being the most prevalent product. The fermentation broth fermented at 35 °C with a fermentation time of 20 days has the highest biological utilizability.
Influence Factors of Gas Extraction Effect and Residual Gas Content Distribution on Working Face
Authors: Hong Ding 
Published: December 2019

Abstract
The influence factors of gas extraction effect and residual gas content after bedding drainage on working face were uncertain, leading to the judge standard of gas extraction effect was not in conformity with the actual extraction situation. The influence zones of gas extraction were divided, according to the goaf and coal pillar of protective layer, including the tectonic belt of working face. The gas extraction parameters and residual gas content were tested, and the gas extraction effect and residual gas content distribution under different influence factors was studied by using Surfer software. The results showed that the concentrated stress under coal pillar made the gas extraction effect reduced greatly. Both the goaf and structural belt had relieving pressure effect on the C7+8 coal seam, but the gas extraction effect was better in the area dominated by the relieved pressure of goaf, while the gas extraction effect was worse in the area dominated by the relieved pressure of structural belt. From large to small, the residual gas content distribution in Area III was greater than that in Area II, greater than that in Area V, greater than that in Area I, greater than that in Area IV.
Rapid Detection of As(III) in Coal Gangue with Anodic Stripping Voltammetry Method
Authors: Wang Xiu-Teng , Xu Xiaowei , Lin Ling , Xu Ling , Huang Jin , Zhang Houhu , Dongfeng GAO , Fan Luoqi 
Published: December 2019

Abstract
It is important to detect arsenic content in the process of comprehensive utilization of coal gangue in view of environment risk control. In this work, we proposed a rapid detect method of As(III) in coal gangue with anodic stripping voltammetry, and optimized the operating parameters by a large number of experiments. The result shows that the anodic stripping voltammetry can accurately analyse As(III) in coal gangue in real time. Anodic stripping voltammetry method is suitable for small and medium-sized enterprises because of its short detection time and low cost of equipment.
First-principle calculation of stainless steel 304N used in concrete-filled steel tubular
Authors: Guo Yaqin , Liang Duoqiang , Deng Yong , Zheng Xuemei 
Published: December 2019

Abstract
Stainless steel 304N was calculated in the paper for the possible use in concrete-filled steel tubular. Calculation results show that compared with conventional 304 ferrite stainless steel, 304N adds alloy element niobium. Because Nb has strong effect of fixing carbon and nitrogen and refining ferrite grain size, 304N has very uniform and fine ferrite structure in annealing state, and carbonitride precipitates very little at grain boundary. Its corrosion resistance, formability, weldability and wrinkle resistance are better than ordinary 304.
Production Technology Requirement of Hong Kong Special Administrative Region on Prefabricated Segment
Authors: Lixu Cai 
Published: December 2019

Abstract
Prefabricated segmental beam bridge is widely adopted in city construction of Hong Kong, Macao and other developed regions with the advantages of product factory production, high quality control grade, excellent appearance quality, quick and convenient site installation, etc. Short line method prefabrication technology is finally selected, short line matching method technology principle and characteristics are combined for in-depth analysis and summary of template model selection, data monitoring, site casting process, etc. through comparative analysis based on the Hong Kong segmental beam prefabrication project contracted by Dongjiangkou Prefabrication Factory in the paper. Various effective measures are adopted to ensure the production efficiency and product quality of prefabricated parts.
Seismic behavior of the multistory steel-braced building with self-centering tension-only braces
Authors: Chi Pei , Tian Wenlong 
Published: December 2019

Abstract
Recent research has developed the self-centering tension-only brace (SC-TOB) that provides both seismic resilience and load mitigation to the structure. This study examined the seismic behavior of the SC-TOB frames (SC-TOBFs) through pushover and nonlinear dynamic analysis. The results indicate that the SC-TOBs can be designed to perform as conventional tension-only braces just offering required lateral stiffness to the structure under minor earthquakes and to function with excellent energy dissipation and recentering capabilities during significant earthquakes. The SC-TOBFs are capable of recentering both within 2% roof drift angle in pushover analysis and under the most severe hazard level in the dynamic analysis. The SC-TOBs are thereby deemed to be promising bracing members that have the potential to minimize the repair costs and operation disruption after earthquakes.