Traveling waves for a diffusive SIR-B epidemic model with multiple transmission pathways

In this work, we consider a diffusive SIR-B epidemic model with multiple transmission pathways and saturating incidence rates. We first present the explicit formula of the basic reproduction number R0. Then we show that if R0 > 1, there exists a constant c ∗ > 0 such that the system admits traveling wave solutions connecting the disease-free equilibrium and endemic equilibrium with speed c if and only if c ≥ c Since the system does not admit the comparison principle, we appeal to the standard Schauder’s fixed point theorem to prove the existence of traveling waves. Moreover, a suitable Lyapunov function is constructed to prove the upward convergence of traveling waves

Understanding User’s Switching Intention on Mobile Payment Platforms

With the development of mobile payment (m-payment) service, the competition accordingly increases among m-payment market. Users face multiple choices when adopting m-payment services. It is critical for both scholars and m-payments providers to understand what the underlying factors can influence user’s switching from one incumbent m-payment platform to another. To solve this question, we employ a push-pull-mooring (PPM) framework to build the research model. We propose that user’s dissatisfaction on incumbent m-payment provider is the main push factor for user’s switching. The attractiveness of alternative and peer influence are the pull factors influencing user’s switching. Cognitive lock-in, as the mooring factor, could influence switching intention directly. Additionally, we posit that cognitive lock-in can moderate the effects of both push and pull factors on user’s switching intention. This study will use survey methodology and structural equation modelling approach to test the hypotheses

Crowdsourcing in the Digital Humanities: An Action Research on the Shengxuanhuai Manuscript Transcription

In recent years, there has been an emerging trend in the GLAMs (Galleries, Libraries, Archives and Museums) to leverage crowdsourcing to improve the collection, organization, and evaluation of valuable resources. Although a se-ries of notable crowdsourcing projects in the digital humanities have been launched worldwide, there are few academic studies on investigating the im-plementation and evaluation of such cases. To fill up the research gap, this study aims at conducting a field exploration on the real case called the Shengxuanhuai Manuscript Transcription Initiative (Transcribe Sheng for short). In this poster, action research will be carried out to explore the vari-ous stages of Transcribe Sheng project. Our attempts may shed light on the design and evaluation principles of the crowdsourcing in the digital humani-ties

Sure Screening for Transelliptical Graphical Models

We propose a sure screening approach for recovering the structure of a transelliptical graphical model in the high dimensional setting. We estimate the partial correlation graph by thresholding the elements of an estimator of the sample correlation matrix obtained using Kendall's tau statistic. Under a simple assumption on the relationship between the correlation and partial correlation graphs, we show that with high probability, the estimated edge set contains the true edge set, and the size of the estimated edge set is controlled. We develop a threshold value that allows for control of the expected false positive rate. In simulation and on an equities data set, we show that transelliptical graphical sure screening performs quite competitively with more computationally demanding techniques for graph estimation.Comment: The paper won the David Byar travel award in the Joint Statistical Meetings (JSM) 201

Effects of Hf, B, Cr and Zr alloying on mechanical properties and oxidation resistance of Nb-Si based ultrahigh temperature alloy

Multi-component Nb-Si based ultrahigh temperature alloys were prepared by vacuum non-consumable arc melting. The effects of Hf, B, Zr and Cr alloying on the phase selection, phase stability, both non-equilibrium and equilibrium microstructure, room-temperature fracture toughness, hardness and oxidation resistance at 1250 oC of the alloys have been investigated and estimated systematically. The results show that the addition of B or Cr promotes the formation of hypereutectic structures. The alloying with both Hf and B suppresses the formation of β(Nb,X)5Si3 and promotes the formation of α(Nb,X)5Si3 and γ(Nb,X)5Si3, while the alloying with Cr has no effect on the crystal structures of 5-3 silicides. The room-temperature fracture toughness of the alloys is always degraded by the addition of Cr but almost not influenced by the combined additions of Hf and B. The hardness of 5-3 silicides exhibits a tendency of γ \u3e α \u3e β. The macrohardness of the alloys increases with Cr addition, and it obviously reduces in the presence of Hf after 1450 oC/50 h heat-treatment. The best oxidation-resistant performance has been obtained for the alloy with both B and Cr additions. However, in the presence of B and/or Cr, the oxidation resistance of the alloys has been degraded by further addition of Hf. Both sizes and amounts of primary γ-(Nb, X)5Si3 increase with Zr contents in the alloy. Both adhesion and compactness of the scales are improved effectively by increase in Zr content. The mass gain and thickness of the scale decrease with increase in Zr contents, indicating that Zr addition can improve the oxidation resistance of the alloys significantly. Please click Additional Files below to see the full abstract

Expanding CRISPR/Cas9 Genome Editing Capacity in Zebrafish Using SaCas9.

The type II CRISPR/Cas9 system has been used widely for genome editing in zebrafish. However, the requirement for the 5'-NGG-3' protospacer-adjacent motif (PAM) of Cas9 from Streptococcus pyogenes (SpCas9) limits its targeting sequences. Here, we report that a Cas9 ortholog from Staphylococcus aureus (SaCas9), and its KKH variant, successfully induced targeted mutagenesis with high frequency in zebrafish. Confirming previous findings, the SpCas9 variant, VQR, can also induce targeted mutations in zebrafish. Bioinformatics analysis of these new Cas targets suggests that the number of available target sites in the zebrafish genome can be greatly expanded. Collectively, the expanded target repertoire of Cas9 in zebrafish should further facilitate the utility of this organism for genetic studies of vertebrate biology

Traveling waves for a diffusive SIR-B epidemic model with multiple transmission pathways

In this work, we consider a diffusive SIR-B epidemic model with multiple transmission pathways and saturating incidence rates. We first present the explicit formula of the basic reproduction number R0. Then we show that if R0 > 1, there exists a constant c ∗ > 0 such that the system admits traveling wave solutions connecting the disease-free equilibrium and endemic equilibrium with speed c if and only if c ≥ c Since the system does not admit the comparison principle, we appeal to the standard Schauder’s fixed point theorem to prove the existence of traveling waves. Moreover, a suitable Lyapunov function is constructed to prove the upward convergence of traveling waves

Methods of Settling the Sino-Japanese Dispute over the Diaoyu Islands

宋玉祥，厦门大学法学院2003级硕士研究生，研究方向为国际海洋法。【中文摘要】在国际法上，国际争端的程序问题与实体问题同样重要。从程序方 面来讲，武力解决方式与和平解决方式（包括政治方式与法律方式）是国际争端解决的2种基本方式。在中日钓鱼岛争端中，由于武力解决方式的使用受到了很大 限制，和平解决方式便更趋重要。而对中国来说，基于各方面因素的考量，政治解决方式是“相对可行而不可取”的，法律解决方式是“相对可取而不可行”的，如 果在目前状况下强行解决钓鱼岛争端，其结果很可能是中日分割钓鱼岛列屿。本 文拟从国际法角度对中日钓鱼岛争端的程序问题进行初步探析。 【Abstract】In international law, procedural and substantial problems of international dispute settlement are equally important. From a procedural perspective, use of force and peaceful means (including political means and legal means) are two basic methods of international dispute settlement. In the Sino-Japanese dispute over the Diaoyu Islands, since the use of force is strictly limited, peaceful means take center stage. For China, considering various aspects, political settlement is “relatively feasible but not desirable” while legal settlement is “relatively desirable but not feasible” If the dispute over the Diaoyu Islands is to be settled under the current situation, the result would probably be that China and Japan will segment the Islands. From the perspective of international law, this article intends to preliminarily explore the procedural problems of the Sino-Japanese dispute settlement over the Diaoyu Islands