Set Of Common Services Research Articles

Ending Software Boom and Bust: Lessons learnt from Scratchpads and proposals for building sustainable virtual research environments for the biodiversity research community

Scratchpads launched in 2007 and became an extremely popular resource adopted for a variety of communities. Primarily, Scratchpads are used to manage and publish biodiversity data, but many sites were organised around projects, societies and regions. Demand for Scratchpads peeked at requests for more than 80 new sites over a 3 month period in 2014. Today we have over 1000 Scratchpad sites. This has not been a pain-free journey. In 2015 the grants funding Scratchpad support and development came to an end, and whilst the Natural History Museum, London, provided some institutional support, this was alongside several competing initiatives. For a period of nearly two years, the Scratchpads had no dedicated developers. The Scratchpads suffered from this neglect, bugs remained unfixed and the platform became increasingly unstable. This situation has now been rectified, in 2017 the Informatics Group expanded, enabling us to provide a dedicated resource to the Scratchpads again. This has been a challenging but valuable learning experience - and one that many Virtual Research Environments (VREs) in our community have, or will, experience. Current funding models encourage a boom and bust development cycle, described by Hine (2008) as the "dance of the initiatives," as projects constantly need to re-invent themselves in order to receive new external funding. We need to move beyond this, to start working collectively to develop a common roadmap for these systems, so we can begin to mutually benefit from each others development activities. Building on lessons learnt from the Scratchpads, we highlight a draft set of principles that may provide a framework for such a collaboration. While it is unrealistic to expect existing projects at different stages of maturity, and supporting very different use cases, to re-write their codebase in order to facilitate collaboration, we propose a microservices framework that would allow these related systems to converge on the delivery of a common set of services, provided by many current VRE's. This convergence, coupled with the development of a common and mutually agreed roadmap for these systems, has the potential to build a more sustainable future for VRE user and developer communities, as these systems evolve to support new use cases and improve existing functionality.

A Framework for External Interference-Aware Distributed Channel Assignment

DES-Chan is a framework for experimentally driven research on distributed channel assignment algorithms in wireless mesh networks. DES-Chan eases the development process by providing a set of common services required by distributed channel assignment algorithms. A new challenge for channel assignment algorithms are sources of external interferences. With the increasing number of wireless devices in the unlicensed radio spectrum, co-located devices that share the same radio channel may have a severe impact on the network performance. DES-Chan provides a sensing component to detect such external devices and predict their future activity. As a proof of concept, the authors present a reference implementation of a distributed greedy channel assignment algorithm. The authors evaluate its performance in the DES-Testbed, a multi-transceiver wireless mesh network with 128 nodes at the Freie Universität Berlin.

Insights from Experimental Research on Distributed Channel Assignment in Wireless Testbeds

This article presents the DES-Chan framework for experimental research on distributed channel assignment algorithms in wireless mesh testbeds. The implementation process of channel assignment algorithms is a difficult task for the researcher since common operating systems do not support channel assignment algorithms. DES-Chan provides a set of common services required by distributed channel assignment algorithms and eases the implementation effort. The results of experiments to measure the channel characteristics in terms of intra-path and inter-path interference according to the channel distance on the DES-Testbed are also presented. The DES-Testbed is a multi-radio WMN with more than 100 nodes located on the campus of the Freie Universität Berlin. These measurements are an important input to validate common assumptions of WMNs and derive more realistic, measurement-based interference models in contrast to simplified heuristics.

Network-based mobility management in the evolved 3GPP core network

A key aspect of the 3GPP system architecture evolution is the specification of an evolved packet core that supports multiple access networks. The EPC enables operators to deploy and operate one common packet core network for 3GPP radio accesses (E-UTRAN, UTRAN, and GERAN), as well as other wireless and wireline access networks (e.g., eHRPD, WLAN, WIMAX, and DSL/Cable), providing the operator with a common set of services and capabilities across the networks. A key requirement of the EPC is to provide seamless mobility at the IP layer as the user moves within and between accesses. This article provides an overview of the EPC specifications that use a network-based mobility mechanism based on Proxy Mobile IPv6 to enable mobility between access networks. An important facet of providing seamless mobility for a user's sessions across technologies is to ensure that quality of service is maintained as the user moves between accesses. An overview of the "off-path" QoS model to supplement PMIPv6 is also provided.

SEMI E133—The Process Control System Standard: Deriving a Software Interoperability Standard for Advanced Process Control in Semiconductor Manufacturing

The process control systems (PCS) SEMI Standard E133 facilitates the integration of PCS into current and future fabs. The standard focuses on defining the portion of ldquointerface Brdquo associated with communication with and between components of PCSs. Specifically, the scope of the standard is the functional groups of run-to-run (R2R) control, fault detection (FD), fault classification (FC), fault prediction (FP), and statistical process control (SPC). The standard specifies PCS interfaces (which utilize ldquointerface Brdquo) that will enable these functional groups to interact effectively and share data among themselves and with the other interdependent factory systems, including systems within the process equipment. Key requirements driving the standard specification include the move to service-oriented and event-driven architectures and a need to define PCS capabilities from an input/output (I/O) perspective along functional boundaries defined by commercial applications. The developed standard addresses these requirements and specifies: 1) the capabilities of all five functional groups; 2) a comprehensive I/O interface data model; 3) an XML representation of that data model (E133.1); 4) a set of common services and behavior classes; 5) extensions of the I/O structure and behavior for each functional group; and 6) an application note that provides an example of PCS integration with equipment data acquisition (EDA) data collection. XML, R2R control, and FD implementation examples illustrate that the standard addresses these requirements, with the FD example further illustrating compatibility with EDA ldquointerface Ardquo standards. The standard to date has mature R2R control and FD specifications with key PCS users and providers indicating that they are using the standard extensively.

Service Organizations for Gay and Lesbian Youth

This paper discusses six youth service organizations that represent different solutions to the same problem: the acceptance of sexual minority youth. These solutions include youth-led groups, organizations dedicated to training and education, and agencies that provide direct services to youth. This chapter tries to bring some insight into the forces that formed these groups and discusses some of the new directions in the youth service community. Although each of these groups started with different structures and services, many have evolved to offer a common set of services. Future organizations will be able to benefit from this by assembling programs from the model components that have already been implemented. Future work should enhance those effective service components that have received little attention and develop new models to meet youth needs.

Edificio Mitre, en Barcelona, España

This project consists of seven blocks, each 12 storeys high. They have a common set of services, including central heating, parking, domestic aids, washing installations, snack bar, a pharmacy and a children's nursery. The ground floor of each block has shops, the main and the service vestibules, n porter's room, storage for parambulators, and refuse storage space. The first floor of each block is devoted to apartments, and the rest of the floors to flats. The project is so well planned and so constructed that it can be cited as an example of small sized flats organised in a large set of blocks.