2,869 research outputs found

    Space biology initiative program definition review. Trade study 4: Design modularity and commonality

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    The relative cost impacts (up or down) of developing Space Biology hardware using design modularity and commonality is studied. Recommendations for how the hardware development should be accomplished to meet optimum design modularity requirements for Life Science investigation hardware will be provided. In addition, the relative cost impacts of implementing commonality of hardware for all Space Biology hardware are defined. Cost analysis and supporting recommendations for levels of modularity and commonality are presented. A mathematical or statistical cost analysis method with the capability to support development of production design modularity and commonality impacts to parametric cost analysis is provided

    Engineer-to-order and make-to-order production: a case study

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    Confidential until 26-nov-201

    Modularity in action.GNU/Linux and free/Open source sotfware development model unleashed.

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    Organizational and managerial theories of modularity applied to the design and production of complex artifacts are used to interpret the rise and success of Free/Open Source Software methodologies and practices in software engineeringmodularity; software project management; free/open source software; division of labor; coordination; information hiding

    Breaking Through: Helping Low-Skilled Adults Enter and Succeed in College and Careers

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    Examines the capacity of community colleges to enable low-income, low-literacy, low-skilled adults to acquire the skills and credentials necessary to succeed at work. Identifies strategies that are transferable from one school or program to another

    Measuring the Cognitive Complexity in the Comprehension of Modular Process Models

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    Modularization in process models is a method to cope with the inherent complexity in such models (e.g., model size reduction). Modularization is capable to increase the quality, the ease of reuse, and the scalability of process models. Prior conducted research studied the effects of modular process models to enhance their comprehension. However, the effects of modularization on cognitive factors during process model comprehension are less understood so far. Therefore, this paper presents the results of two exploratory studies (i.e., a survey research study with N = 95 participants; a follow-up eye tracking study with N = 19 participants), in which three types of modularization (i.e., horizontal, vertical, orthogonal) were applied to process models expressed in terms of the Business Process Model and Notation (BPMN) 2.0. Further, the effects of modularization on the cognitive load, the level of acceptability, and the performance in process model comprehension were investigated. In general, the results revealed that participants were confronted with challenges during the comprehension of modularized process models. Further, performance in the comprehension of modularized process models showed only a few significant differences, however, the results obtained regarding the cognitive load revealed that the complexity and concept of modularization in process models were misjudged initially. The insights unraveled that the attitude towards the application and the behavioral intention to apply modularization in process model is still not clear. In this context, horizontal modularization appeared to be the best comprehensible modularization approach leading to a more fine-grained comprehension of respective process models. The findings indicate that alterations in modular process models (e.g., change in the representation) are important to foster and enable their comprehension. Finally, based on our results, implications for research and practice as well as directions for future work are discussed in this paper

    Ground-Based 1U CubeSat Robotic Assembly Demonstration

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    Key gaps limiting in-space assembly of small satellites are (1) the lack of standardization of electromechanical CubeSat components for compatibility with commercial robotic assembly hardware, and (2) testing and modifying commercial robotic assembly hardware suitable for small satellite assembly for space operation. Working toward gap (1), the lack of standardization of CubeSat components for compatibility with commercial robotic assembly hardware, we have developed a ground-based robotic assembly of a 1U CubeSat using modular components and Commercial-Off-The-Shelf (COTS) robot arms without humans-in-the-loop. Two 16 in x 7 in x 7 in dexterous robot arms, weighing 2 kg each, are shown to work together to grasp and assemble CubeSat components into a 1U CubeSat. Addressing gap (2) in this work, solutions for adapting power-efficient COTS robot arms to assemble highly-capable CubeSats are examined. Lessons learned on thermal and power considerations for overheated motors and positioning errors were also encountered and resolved. We find that COTS robot arms with sustained throughput and processing efficiency have the potential to be cost-effective for future space missions. The two robot arms assembled a 1U CubeSat prototype in less than eight minutes

    Change, Coordination, and Capabilities

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    Empirical studies on coordination of economic activities focused on the two polar cases of governance mode, namely vertical integration and market exchanges. Whether firms should be vertically integrated or lever market exchanges in the face of change is, however, debated. Two positions have emerged. Some scholars argue that the vertically integrated firm is the appropriate mode of coordination when change occurs, while market exchanges are more appropriate for dealing with stable contexts (Teece, 1996). On the other hand, Harrigan (1984, 1985) contends that firms should rely on market exchanges when technological change renders upstream capabilities obsolete. Based on two case studies of the aircraft engine industry, this paper introduces the concept of systems integration as the primary coordination mechanism in-between markets and hierarchies that firms employ to cope with change. The focus is on multitechnology settings. Multitechnology, multicomponent products intensify the coordination efforts for firms developing them and therefore provide a vantage point to study coordination modes in the face of technological change. The paper argues that systems integration, as a coordination mechanism, comprises a set of different technological and organizational skills, ranging from component assembly through the understanding and integration of the technological disciplines underlying a product, to project management. It shows that from a competitive point of view, systems integration is most appropriately understood as knowledge integration. Systems integrating firms are understood as those organizations that set up the network of actors involved in the industry and lead it from an organizational and technological viewpoint.technological change, systems integration, knowledge integration, vertical integration, market exchanges

    Reconfigurability Function Deployment in Software Development

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    In the forthcoming highly dynamic and complex business environment high-speed and cost-effective development of software applications for targeting a precise, unique and momentary set of requirements (no more-no less) associated to a customized business case will bring sig-nificant benefits both for producers and users. This requires a life cycle change-oriented ap-proach in software development. In this respect, designing software with intrinsic evolutionary resources for reconfiguration represents the sound approach. A methodology for concurrent deployment of reconfigurability characteristics in software applications is introduced in this paper. Its potential is exemplified in a case study dealing with web-based software tools to support systematic product innovation projects.Reconfigurability, Software Development, Innovation, TRIZ, RAD

    Filler + Infinitive and Pre- and Protomorphology Demarcation in a French Acquisition Corpus

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    This paper presents a case study on the acquisition of grammatical morphemes via fillers, i.e., underspecified place holders, with particular focus on early structures made up of a filler followed by an infinitive. The path leading from fillers to French semi-auxiliaries and subject clitics is analyzed within the framework of Natural Morphology and constructivism which assumes that grammatical modules are not innate but are constructed by children. The evolution of fillers in the corpus studied is described as a grammaticization process of form and meaning through successive linguistic dissociations. Emphasis is put on the functional polyvalence of fillers and on their relation to the main phases in the construction of gramma
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