Students home alone—profiles of internal and external conditions associated with mathematics learning from home     

Hofer  Sarah I.  Reinhold  Frank  Koch  Marco 《European Journal of Psychology of Education - EJPE》2023,38(1):333-366

European Journal of Psychology of Education - This study aims at describing differences in internal and external resources of students to handle mathematics learning from home. Based on data from...  相似文献   

Velocity observer design for the consensus in delayed robot networks     

Marco A. Arteaga–Pérez  Emmanuel Nuño 《Journal of The Franklin Institute》2018,355(14):6810-6829

The consensus problem for networks of multiple agents consists in reaching an agreement between certain coordinates of interest using a distributed controller. It may be desirable that all the agents find a consensus at a given desired leader coordinate (Leader Follower Consensus Problem LFCP), or it may be only necessary that they agree at a certain coordinates value (Leaderless Consensus Problem LCP). Consensus has many practical applications in robot networks systems, where the interconnection of the agents may present variable time delays, hence rendering the stability analysis and control design more complex. Another problem that may arise is the possible lack of velocity measurements. In this work, a Proportional plus damping injection (P + d) controller together with a linear velocity observer is introduced. Our approach is able to solve both the LFCP and the LCP in networks of robots modeled as undirected weighted graphs with unknown asymmetric (bounded) variable time delays. Local (semi global) asymptotic stability is proven and simulation results are provided to test the performance of the proposed scheme.  相似文献   

Searching for innovation knowledge: insight into KIBS companies     

Malgorzata?ZiebaEmail author  Ettore?Bolisani  Marco?Paiola  Enrico?Scarso 《知识管理研究与实践》2017,15(2):282-293

The paper analyses the activity of research for “innovation knowledge”—here defined as knowledge that can lead to the introduction of service innovations—by Knowledge-Intensive Business Services (KIBS) companies. It proposes a classification of the possible search approaches adopted by those companies based on two dimensions: the pro-activity of search efforts and the source primarily used. Such classification is then discussed on the basis of the findings of a multiple case-study investigation involving 15 Italian and Polish KIBS companies. The study confirms that KIBS firms follow various approaches to acquire knowledge for innovation: some companies adopt a passive behaviour (i.e. innovative ideas come as a kind of side effect of their daily business activities), while others an active one (namely, they actively search for new ideas originating from various sources); some rely more on internal resources (employees, in-house R&D, internal documents, etc.), while others on external sources (clients, suppliers, service providers, universities, etc.). The results of the study have implications both for research and management that are discussed in the conclusions.  相似文献