Xavier Gonzalez

This essay analyzes a sampling of Xavier Gonzalez’s paintings and murals, and examines the connections between Gonzalez and Pablo Picasso through journals and notes by Gonzalez himself. Gonzalez’s career as an artist spanned decades, during which he explored many different types of media. His watercolors draw upon a Cubist legacy and integrate geometric elements within his realist subject matter. Gonzalez’s murals for the New Orleans Lakefront Airport feature sweeping scenes of flight that capture the modern experience. The murals represent the apex of Gonzalez’s career as an artist working in public spaces, though they later faded into oblivion as the airport lost its luster. Gonzalez’s later paintings from the 1940s and 1950s engage emotionalism and humanism, and operate on multiple levels of meaning. From Gonzalez’s own notes, one can gain insight into how the influences and observations of Pablo Picasso aided him to define his work and his approach to art in general. Both natives of Spain, Picasso and Gonzalez shared an aversion to reading about or critiquing art. Instead, Gonzalez relied on his observations of other artists, such as Picasso and his wife Ethel Edwards. In lieu of a definitive biography or catalogue raisonné of Gonzalez’s art yet to be written, this essay should serve as starting point for further Gonzalez research to be undertaken in the future

Quasi-isometric embeddings from mapping class groups of nonorientable surfaces (Women in Mathematics)

Classifying finitely generated groups by quasi-isometries is a key issue in geometric group theory: two groups are quasi-isometric if, roughly speaking, their word metrics are the same up to linear functions. It is known that the mapping group Mod(N) of a nonorientable surface N is a subgroup of the mapping group Mod(S) of its double covering orientable surface S. We show that the injective homomorphism is a quasi-isometric embedding. This is a joint work with Takuya Katayama

Right-angled Artin groups and curve graphs of nonorientable surfaces

Let $N$ be a closed nonorientable surface with or without marked points. In this paper we prove that, for every finite full subgraph $\Gamma$ of $\mathcal{C}^{\mathrm{two}}(N)$, the right-angled Artin group on $\Gamma$ can be embedded in the mapping class group of $N$. Here, $\mathcal{C}^{\mathrm{two}}(N)$ is the subgraph, induced by essential two-sided simple closed curves in $N$, of the ordinal curve graph $\mathcal{C}(N)$. In addition, we show that there exists a finite graph $\Gamma$ which is not a full subgraph of $\mathcal{C}^{\mathrm{two}}(N)$ for some $N$, but the right-angled Artin group on $\Gamma$ can be embedded in the mapping class group of $N$.Comment: 16 pages, 7 figure

Research and Design of a Routing Protocol in Large-Scale Wireless Sensor Networks

无线传感器网络，作为全球未来十大技术之一，集成了传感器技术、嵌入式计算技术、分布式信息处理和自组织网技术，可实时感知、采集、处理、传输网络分布区域内的各种信息数据，在军事国防、生物医疗、环境监测、抢险救灾、防恐反恐、危险区域远程控制等领域具有十分广阔的应用前景。 本文研究分析了无线传感器网络的已有路由协议，并针对大规模的无线传感器网络设计了一种树状路由协议，它根据节点地址信息来形成路由，从而简化了复杂繁冗的路由表查找和维护，节省了不必要的开销，提高了路由效率，实现了快速有效的数据传输。 为支持此路由协议本文提出了一种自适应动态地址分配算——ADAR（AdaptiveDynamicAddre...As one of the ten high technologies in the future, wireless sensor network, which is the integration of micro-sensors, embedded computing, modern network and Ad Hoc technologies, can apperceive, collect, process and transmit various information data within the region. It can be used in military defense, biomedical, environmental monitoring, disaster relief, counter-terrorism, remote control of haz...学位：工学硕士院系专业：信息科学与技术学院通信工程系_通信与信息系统学号：2332007115216