Research on Location Characteristics and Algorithms based on Frequency Domain for a 2D Underwater Active Electrolocation Positioning System

Weakly electric fish has an ability to generate a low-frequency electric field actively to locate the surrounding object in complete darkness by sensing the change of the electric field.This ability is called active electrolocation.In this paper,we designed a two-dimensional (2D) experimental platform of underwater active electrolocation system by simulating weakly electric fish.On the platform,location characteristics based on frequency domain were investigated.Results indicated that surface shape of 3D location characteristic curves for the 2D underwater active electrolocation positioning system was convex upwards or concave down which was influenced by the material of probed objects and the frequency of the electric field excitation signal.Experiments also confirmed that the amplitude of the electric field excitation signal and the size of the probed object will only influence the amplitude corresponding to 3D location characteristic curves.Based on above location characteristics,we present three location algorithms including Cross Location Algorithm (CLA),Stochastic Location Algorithm (SLA) and Particle Swarm Optimization (PSO) location algorithm in frequency domain and achieved the task of the underwater positioning system.Our work may have reference value for underwater detection study.     

A Common Data Set and Framework for Representing Spatial Location Information in the Internet

Many organizations are currently working on how to express and provide location information to services and applications in the Internet. Each of them basically specifies their own way. This raises a problem – the various location information formats, services and applications will not be interoperable in the Internet. Interoperability can be achieved if there is a common way of expressing location information. This paper therefore proposes a common data set and an extensible framework of expressing location information in the Internet. The design aims at bridging various existing/proposed location data representation formats, as well as meeting the requirements of existing/proposed location-aware services.     

A Comparison of Protocols for Updating Location Information

Detailed location information of mobile objects, for example that of a user with a mobile computer or phone, is an important input for many location-aware applications. However, constantly updating the location information for thousands of mobile objects is not feasible. Therefore, special update protocols for location information are required that transmit the information as efficiently as possible, that is requiring only few update messages, while still being effective in returning the location information with the desired accuracy. Different classes of such update protocols are described in this paper and a new combined protocol is proposed. To be able to compare their effectiveness and efficiency, we present an analysis for the minimum and average resulting accuracy of the location information in comparison with the number of messages transmitted. We also present the results of simulations that we have performed to back up our analysis.     

Application of Spatial Location Information to SIP

This paper introduces an approach for providing the Spatial Location (SLO) information of the Session Initiation Protocol (SIP) devices connected to wire and wireless IP networks. The aim of the paper is to set up the framework for providing emergency call services. This method uses SIP as transport and the SLO as data format inserted in the SIP payload. It analyses the relationship among the network elements involved in the architecture, and its functionality for providing emergency call services using SIP. In conclusion, this proposal track down an emergency call via SIP, and additionally enables SIP to support some other location-related services such as messaging, and location-based commerce.     

Minimizing Environmental Risks Using Fuzzy TOPSIS: Location Selection for the ITU Faculty of Management

ABSTRACT

Environmental risk is a measure of potential threats to the environment and combines the probability that events will cause or lead to degradation of the environment and the severity of that degradation. Evaluation of environmental risk factors requires linguistic terms to be used rather than exact numerical assignments. The fuzzy set theory provides a useful tool for converting linguistic terms into numerical evaluations. In this article, we will try to select the best location for the Faculty of Management of the Istanbul Technical University taking care of the predetermined environmental criteria by using fuzzy TOPSIS. The decision matrix is composed of linguistic evaluations for the alternatives with respect to the environmental risk criteria. The Macka Campus area has been selected after the multicriteria evaluation. A sensitivity analysis is also realized to see if the minor changes in criteria weights cause any change in the ranking of alternatives. Unless the importance of the criteria rock or soil structure, remoteness to health facilities, transportation availability, and transportation costs is changed to be from low to extremely low importance, the Macka Campus is still the selected alternative.     

生态基础设施的定义、内涵及其服务能力研究进展

生态基础设施是保持、改善和增加生态系统服务必备的一系列条件和组合,其类型包括城市绿地、湿地、农田、生物滞留池、绿色屋顶等自然和半自然系统,是城市可持续发展的重要保障和支撑。生态基础设施的功能是保障城市生态功能正常运行,并且其居民持续地获得生态服务。对生态基础设施的定义和内涵进行了辨析,分别从区域与城市/社区尺度对生态基础设施提供的调节服务、支持服务、文化服务和供应服务4个方面的生态系统服务进行了梳理,并针对生态基础设施的径流滞蓄、水质净化和气候调节能力与提升技术进行了具体讨论。对生态基础设施服务评估的物质量评估、价值量评估、能值分析以及模型模拟方法的适用性与局限性进行了总结与比较。基于上述分析提出了生态基础设施未来几点研究方向:(1)生态基础设施的多尺度协调规划;(2)基于物联网技术的生态基础设施智能监测体系;(3)基于景感生态学的生态基础设施服务能力综合评估方法。     

介绍一种半薄切片定位样品的方法

介绍了一种半薄切片定位样品的方法。此法与前人的方法不同之处在于位于载玻片之上被重新包埋于塑料环内的切片与载玻片的分离真人处步骤是“切片被包埋聚合好后,立即从６０￣６５℃温箱内被转入冰箱冷冻室中（－１８℃）放置５￣１０分钟。然后,将载玻征从冷冻室中取出,轻推塑料环,即可使包埋在塑料环内的切片与载玻片分离。这一方法成功地解决了样品中靶细胞的发育时期确定和样品丢失问题。而且还有简单、易操作和成功率高等优     

Dynamic Service Discovery for Mobile Computing: Intelligent Agents Meet Jini in the Aether

The emergence of ad-hoc pervasive connectivity for devices based on Bluetooth-like systems provides a new way to create applications for mobile systems. We seek to realize ubiquitous computing systems based on the cooperation of autonomous, dynamic and adaptive components (hardware as well as software) which are located in vicinity of one another. In this paper we present this vision. We also describe a prototype system we have developed that implements parts of this vision – in particular a system that combines agent oriented and service oriented approaches and provides dynamic service discovery. We point out why existing systems such as Jini are not suited for this task, and how our system improves on them.     

Antifeeding Active Substances for Insect in Plant

The survey of the presence of chemical resistant factors in plants against the larvae of Spodoptera litura F. was examined. In addition, the antifeeding diterpenes were surveied from thirteen species of plants that belong to Verbenaceae family. Finally isolated thirteen antifeedants and one derivative were examined the antifeeding activity for the larvae by the leaf disk method.     

Contemplating a Constructivist Stance for Active Learning within Music Education

This article examines constructivist philosophies for learning with an emphasis on student-centered environments in education and the active involvement of students in learning as they relate new understanding to what they already know and refine previous skills in terms of newly acquired proficiencies. Active learning is explored from a constructivist perspective in which students adopt an analytic approach to questioning and problem solving. Through these processes, students extend their current understanding and emerge as independent musicians, actively engaged in their work as singers, players, composers, improvisers, and listeners. This approach is contrasted with student involvement in hands-on activities in which the focus is on the actions needed to fulfill a given task and limited awareness is devoted to the thinking required to complete the work. I examine the implications of this approach for educational practice and call on policymakers to re-envision music education with attention to engaged learning as perceived within constructivist ways of knowing.     

一种预测细胞凋亡蛋白的亚细胞定位的新方法

细胞凋亡蛋白对生物体的发育、维持内环境稳定及人们理解细胞凋亡机制非常重要。文中提出了一种新的蛋白质序列特征提取方法—三肽离散源方法。计算了蛋白质序列中紧邻三联体的出现个数,利用离散增量极小化对凋亡蛋白进行定位预测;同时推广了张春霆等提出的内容平衡精度指数,使其能评估任意类的分类问题。实验结果表明:在凋亡蛋白定位预测研究中,三肽离散源方法在提高总体预测精度的同时,能够较好的解决样本不均衡问题;而内容平衡精度指数能比传统的总体预测精度更准确的评估预测算法的预测能力,有效的反映预测算法对样本不均衡问题的相容能力。     

New Procedure for Selection of Variables in Location Model for Mixed Variable Discrimination

A new method for the choice of variables with the greatest discriminatory power in the location model for mixed variable discriminant analysis is presented in the paper. The procedure based on the multivariate discriminatory measure enables a simultaneous reduction of the number of discrete and continuous variables. The introduced criterion can be used for both optimal or step-wise selection of variable subset. As an example the results of the stepwise variable selection for some medical data are presented in the paper.     

DyRAM: An Active Reliable Multicast Framework for Data Distribution

Group communications (multicast) are foreseen to be one of the most critical yet challenging technologies to meet the exponentially growing demands for data distribution in a large variety of applications of the Internet (such as grid computing, web applications and distributed simulations). When reliability is required, there is no straightforward solutions and meeting the objectives of reliable multicast is not an easy task. Active networks open a new perspective in providing more efficient solutions for the problem of reliability. In this context, routers are able to perform customized computations on the packets flowing through them. In this paper, we propose a receiver-based (replier) local recovery multicast protocol with dynamic repliers elected on a per-packet basis. Designed to provide an efficient reliable multicast service without any cache facilities inside the network, our approach, uses low-overhead active services in routers. The current paper addresses the design, evaluation and the implementation of an efficient and scalable reliable multicast protocol noted DyRAM standing for Dynamic Replier Active reliable multicast.     

小偃6号小麦旗叶直立基因的染色体定位

本文首次对小麦旗叶姿态进行了比较系统的细胞遗传学研究。单体、端体的F_1及F_2分析表明:中国春2D染色体上至少有两个旗叶下披基因,即位于2DL上的P_1和2DS上的P_2,前者表达能力很强,后者则较弱,与小偃6号旗叶直立基因共存时分别表现为显性和隐性;小偃6号的旗叶直立基因E也位于2D染色体上,同(P_1+P_2)共存时表现为隐性,仅与P_2共存时则表现为显性。文章还就这些基因的染色体操作等进行了讨论。     

A Dynamic Workflow Approach for the Integration of Bioinformatics Services

Modern biological and chemical studies rely on life science databases as well as sophisticated software tools (e.g., homology search tools, modeling and visualization tools). These tools often have to be combined and integrated in order to support a given study. SIBIOS (System for the Integration of Bioinformatics Services) serves this purpose. The services are both life science database search services and software tools. The task engine is the core component of SIBIOS. It supports the execution of dynamic workflows that incorporate multiple bioinformatics services. The architecture of SIBIOS, the approaches to addressing the heterogeneity as well as interoperability of bioinformatics services, including data integration are presented in this paper.     

AidAdom: Supporting Inter-Organizational Coordination for Home Help and Healthcare Services Through a Web Platform

Purpose

From temporary need of help for household chores after a short stay at the hospital to complex healthcare due to chronic conditions, an important number of professional caregivers belonging to different organizations are involved in providing help and healthcare services at home. Despite the well-defined role of each professional, these organizations are complaining of a lack of coordination and visibility of each other work, especially in case of incident. Coordination between organizations appears here as essential but is at the same time the responsibility of all and of no one of the involved professionals. In this context, our research aims at supporting coordination for home care work through the design and implementation of a web platform.

小麦新种质241千粒重的基因定位

以小麦新种质材料241为测定系,中国春单体系及双端体系作为测验系,对控制千粒重的基因进行了定位研究,结果表明,小麦新种质材料241的3A,2B,7B和6D染色体上具有控制千粒重的基因,其中3A,7B和6D染色体上的基因表现为强效, 2B染色体上的基因表现为弱效,通过双端体分析进一步将控制千粒重的基因定位到3AL,7BL和6DL上,其中6DL上可能具有控制241千粒重的新基因。