Results 11 to 20 of about 5,579,484 (341)
Serviços de referência virtual Virtual reference services
Ciência da Informação, 2001 Analisar os serviços de referência virtual, seus padrões e novas tecnologias que têm modificado a prática tradicional realizada no balcão de referência das bibliotecas.
Miguel Ángel Márdero Arellano
doaj +2 more sources
IEEE Access, 2021 In this study, a data-driven design method is proposed for a dual-rate system, where the sampling interval of a plant output is restricted and is an integer multiple of the holding interval of a control input.
Takao Sato +3 more
semanticscholar +1 more source
Formulation of Three-Phase State Estimation Problem Using a Virtual Reference
IEEE Transactions on Power Systems, 2021 State Estimation (SE) is the backbone of modern Energy Management System (EMS) due its capability of processing real time measurements and provide reliable information to system operators.
A. Langner, A. Abur
semanticscholar +1 more source
Formality in Chat Reference: Perceptions of 17- to 25-Year-Old University Students
Evidence Based Library and Information Practice, 2013 Objective – To examine the ways in which the formality of language used by librarians affects 17- to 25-year-old university students’ perceptions of synchronous virtual reference interactions (chat reference), in particular, perceptions of answer ...
Jennifer Waugh
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Long-Range Tails in van der Waals Interactions of Excited-State and Ground-State Atoms [PDF]
, 2017 A quantum electrodynamic calculation of the interaction of an excited-state atom with a ground-state atom is performed. For an excited reference state and a lower-lying virtual state, the contribution to the interaction energy naturally splits into a ...
Debierre, V., Jentschura, U. D.
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Formation control of a group of micro aerial vehicles (MAVs) [PDF]
, 2013 Coordinated motion of Unmanned Aerial Vehicles (UAVs) has been a growing research interest in the last decade. In this paper we propose a coordination model that makes use of virtual springs and dampers to generate reference trajectories for a group of ...
Guney, Mehmet Ali +3 more
core +1 more source
Differences in spatial memory recognition due to cognitive style [PDF]
, 2017 Field independence refers to the ability to perceive details from the surrounding context as a whole and to represent the environment by relying on an internal reference frame.
Boccia, Maddalena +3 more
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The nature of virtual communities [PDF]
, 2006 The impressive development of electronic communication techniques has given rise to virtual\ud communities. The nature of these computer-mediated communities has been the subject of much recent\ud debate.
Memmi, Daniel
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Evidence Based Library and Information Practice, 2011 Objective – To examine provider pessimism by comparing user and provider perception of the same instant messaging reference transaction. Design – Instant messaging users and providers completed post-reference transaction surveys which were analyzed
Carol D. Howe
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