Pixilated Problem Patrons: Or, the Trials of Working Virtual Reference and What We've Learned from It

2009 ◽  
Vol 50 (3) ◽  
pp. 291-296 ◽  
Author(s):  
Samantha H. Thompson
Keyword(s):  
Virtual Reference ◽  
Problem Patrons

Realization of FIR Prefilter for Virtual Reference Feedback Tuning

2017 ◽  
Vol 137 (7) ◽  
pp. 884-890 ◽  
Author(s):  
Yoshihiro Matsui ◽  
Hideki Ayano ◽  
Shiro Masuda ◽  
Kazushi Nakano
Keyword(s):  
Virtual Reference

Visual Communication: A Study of Library Virtual Reference Icons Online

2013 ◽  
Author(s):  
Martina M. King
Keyword(s):  
Visual Communication ◽  
Visual Representations ◽  
Research Library ◽  
Virtual Reference ◽  
Site Web ◽  
Library Staff ◽  
Selection Of

Libraries use icons (visual representations) on their websites to draw attention to features and services. How are library staff to evaluate their icons? This session reports the results of a thesis study which examines and assesses a selection of virtual reference icons from Association of Research Library websites.Les bibliothèques utilisent des icônes (représentations visuelles) sur leur site Web pour attirer l'attention sur certains éléments et services. Quelle est l'aptitude des employés de bibliothèques pour évaluer ces icônes? Cette séance présente les résultats d'une étude de thèse qui examine et mesure une gamme d'icônes de référence virtuelle trouvés sur les sites Web des membres de l'Association of Research Library. 

scholarly journals Design and validation of an MPC controller for CMG-based testbed

2021 ◽  
Author(s):  
Matteo Facchino ◽  
Atsushi Totsuka ◽  
Elisa Capello ◽  
Satoshi Satoh ◽  
Giorgio Guglieri ◽  
...  
Keyword(s):  
Predictive Control ◽  
Attitude Control ◽  
High Speed ◽  
Control Method ◽  
Input Constraints ◽  
Virtual Reference ◽  
Control Moment ◽  
Pyramidal Configuration ◽  
Actuation Systems ◽  
Constraints Satisfaction

AbstractIn the last years, Control Moment Gyros (CMGs) are widely used for high-speed attitude control, since they are able to generate larger torque compared to “classical” actuation systems, such as Reaction Wheels . This paper describes the attitude control problem of a spacecraft, using a Model Predictive Control method. The features of the considered linear MPC are: (i) a virtual reference, to guarantee input constraints satisfaction, and (ii) an integrator state as a servo compensator, to reduce the steady-state error. Moreover, the real-time implementability is investigated using an experimental testbed with four CMGs in pyramidal configuration, where the capability of attitude control and the optimization solver for embedded systems are focused on. The effectiveness and the performance of the control system are shown in both simulations and experiments.

scholarly journals HEIGHT DETERMINATION TECHNIQUES FOR THE NEXT NATIONAL HEIGHT SYSTEM OF FINLAND - A CASE STUDY

2015 ◽  
Vol 41 (4) ◽  
pp. 145-155
Author(s):  
Timo Saari ◽  
Markku Poutanen ◽  
Veikko Saaranen ◽  
Harri Kaartinen ◽  
Antero Kukko ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Pilot Project ◽  
Satellite System ◽  
Reference Station ◽  
Virtual Reference ◽  
Precise Levelling ◽  
Height Determination ◽  
Weak Points ◽  
Global Navigation Satellite

Precise levelling is known for its accuracy and reliability in height determination, but the process itself is slow, laborious and expensive. We have started a project to study methods for height determination that could decrease the creation time of national height systems without losing the accuracy and reliability that is needed for them. In the pilot project described here, we study some of the alternative techniques with a pilot field test where we compared them with the precise levelling. The purpose of the test is not to evaluate the mutual superiority or suitability of the techniques, but to establish the background for a larger test and to find strong and weak points of each technique. The techniques chosen for this study were precise levelling, Mobile Laser Scanning (MLS) and Global Navigation Satellite System (GNSS) levelling, which included static Global Positioning System (GPS) and Virtual Reference Station (VRS) measurements. This research highlighted the differences of the studied techniques and gave insights about the framework and procedure for the later experiments. The research will continue in a larger scale, where the suitability of the techniques regarding the height systems is to be determined.

scholarly journals Shaping the future realities of virtual reference

2007 ◽  
Vol 43 (1) ◽  
pp. 1-8
Author(s):  
Marie L. Radford ◽  
Lynn Silipigni Connaway ◽  
Jeffrey Pomerantz
Keyword(s):  
Virtual Reference ◽  
The Future

Current CITE-ings from the popular and trade computing press: telework and telecommuting

2016 ◽  
Vol 33 (1) ◽  
pp. 21-22 ◽  
Author(s):  
Martin Kesselman
Keyword(s):  
Literature Review ◽  
Design Methodology ◽  
Virtual Reference ◽  
Content Type ◽  
Advantages And Disadvantages ◽  
Better Than

Purpose – This article examines Current CITE-ings from the Popular and Trade Computing Press, Telework and Telecommuting Design/methodology/approach – The methodology adopted is a literature review. Findings – Readily available technologies now allow librarians to perform most of their work-offsite. Some traditional building-based services such as reference, have been taken over by virtual reference and now even instruction offers options on par with or even better than classroombased questions such as a webinar that can be viewed and reviewed at any time or by having librarians embedded into various courseware packages. Researchlimitations/implications – Librarians no longer need be limited to a single library; groups of subject librarians can work together in the cloud to provide services to multiple universities. Originality/value – This article collates some articles from the non-library literature that mayprovide some ideas and review advantages and disadvantages for both the library and employee

Three-Dimensional Volume and Position Recovering Using a Virtual Reference Box

2007 ◽  
Vol 16 (2) ◽  
pp. 573-576
Author(s):  
Paulo Roberto Gardel Kurka ◽  
Marcelo Rudek
Keyword(s):  
Three Dimensional ◽  
Virtual Reference

Virtual Reference Feedback Tuning of Internal Model Controllers

2010 ◽  
Author(s):  
Simone Formentin ◽  
Matteo Corno ◽  
Sergio M. Savaresi ◽  
Luigi Del Re
Keyword(s):  
Internal Model ◽  
Virtual Reference
Sign in / Sign up

Export Citation Format

Share Document