scholarly journals Multi-criteria group assessment of e-commerce websites based on the new PROSA GDSS method – the case of Poland

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Pawel Ziemba
Keyword(s):  
2006 ◽  
Vol 11 (11) ◽  
pp. 590-592 ◽  
Author(s):  
Noel V. Stanton ◽  
Tracy Fritsch ◽  
Ciaran Geraghty ◽  
Mary Frances Verostek ◽  
Bruce Weiner ◽  
...  

10.29007/nbg2 ◽  
2018 ◽  
Author(s):  
Wei Tian ◽  
Mingxing Fan ◽  
Yajun Liu

To introduce a new robot-assisted surgical system for spinal posterior fixation which called TiRobot, based on intraoperative three-dimensional images. TiRobot has three components: the planning and navigation system, optical tracking system and robotic arm system. By combining navigation and robot techniques, TiRobot can guide the screw trajectories for orthopedic surgeries.In this randomized controlled study approved by the Ethics Committee, 40 patients were involved and all has been fully informed and sign the informed consent. 17 patients were treated by free-hand fluoroscopy-guided surgery, and 23 patients were treated by robot-assisted spinal surgery.A total of 190 pedicle screws was implanted. The overall operation time were not different for both groups. None of the screws necessitated re-surgery for revised placement. In the robot-assisted group, assessment of pedicle screw accuracy showed that 102 of 102 screws (100%) were safely placed (<2 mm, category A+B). And mean deviation in entry point was 1.70 +/- 0.83mm, mean deviation in end point was 1.84 +/- 1.04mm. In the conventional freehand group, assessment of pedicle screw accuracy showed that 87 of 88 (98.9%) were safely placed (<2 mm, category A+B), 1 screw fall in category C, mean deviation in entry point was 3.73 +/- 2.28mm, mean deviation in end point was 4.11 +/- 2.31mm.This randomized controlled study verified that robot-assisted pedicle screw placement with real-time navigation is a more accuracy and safer method, also revealed great clinical potential of robot-assisted surgery in the future.


2021 ◽  
Author(s):  
◽  
Luong Hai Nhu Nguyen

<p>The purpose of this study was to investigate the perceptions of upper-year students in Vietnamese primary schools about learning in small groups when studying Vietnamese language in comparison to traditional methods. Students’ perceptions of small group learning were explored through examination of five main factors: benefits, difficulties, group types, individual accountability, and group assessment.  An interpretive approach was used to explore the topic, from which data were collected in a two-phase multi-case study using both quantitative and qualitative methods. Four classes of three primary schools in Ho Chi Minh City, having different applications of small groups in learning, were selected for observation and survey by questionnaire. Twenty four students from the first phase of the study varying in gender and learning achievement were chosen for face-to-face interviews to examine more in-depth their perceptions about small group learning. To improve the trustworthiness of the research, teachers from these classes and principles of the schools were interviewed to obtain a more accurate overview of the research.  The study found that overall, Vietnamese upper-primary students preferred to learning in small groups to the traditional whole-class model despite the differences in implementing small group learning in each school. The results showed a positive concurrence with existing literature on the main findings, such as the three main benefits to students’ outcomes (e.g. academic achievement, social skills, and attitudes); and some inevitable difficulties when using this method for learning (e.g. time management, isolation and lack of group skills). The students’ choices of group types also reflected the current international students’ perceptions (e.g. preference for heterogeneous ability but homogeneous gender group).  The research also presented some interesting points unique to the Vietnamese context which might enrich the current literature of students’ perceptions of small group learning. They were the preference for large group sizes, the two-aspects of leadership, the preference for whole-group assessment, and the suitability of this method for learning Vietnamese language rather than other subjects. The research also showed the underlying influences of the desire for better achievement, the consideration for others’ feelings and the collective cultural context on Vietnamese upper primary students’ views of small group learning in learning Vietnamese language. The relationships between students’ gender and achievement to their perceptions of small group learning were also mentioned and described though these were not strong enough to generalise. A theoretical framework was proposed to illustrate the research findings. These findings suggest that small group learning should be implemented more frequently in Vietnamese primary schools and the study recommends that there be further training in group skills for students.</p>


2018 ◽  
pp. 147-181
Author(s):  
Donna S. Sheperis ◽  
Michelle Perepiczka ◽  
Clint Limoges
Keyword(s):  

2005 ◽  
Vol 16 (8) ◽  
pp. 1250-1261 ◽  
Author(s):  
David L. Tabb ◽  
Melissa R. Thompson ◽  
Gurusahai Khalsa-Moyers ◽  
Nathan C. VerBerkmoes ◽  
W. Hayes McDonald

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