Laboratory performance of wi-fi point-to-point links: A case study

2009 ◽  
Author(s):  
J.A.R.P. de Carvalho ◽  
H. Veiga ◽  
P. Gomes ◽  
C.F.F.P.R. Pacheco ◽  
N. Marques ◽  
...  
Keyword(s):  
Laboratory Performance ◽  
Point To Point

Comparison of under-actuated and fully-actuated serial robotic arms: a case study

2021 ◽  
pp. 1-13
Author(s):  
Matteo Bottin ◽  
Giulio Rosati
Keyword(s):  
Degrees Of Freedom ◽  
Simple Point ◽  
Controllable System ◽  
Robotic Arms ◽  
Passive Joint ◽  
Final Configuration ◽  
Vibration Behavior ◽  
Rotational Joint ◽  
Point To Point

Abstract Under-actuated robots are very interesting in terms of cost and weight since they can result in a state-controllable system with a number of actuators lower than the number of joints. In this paper, a comparison between an under-actuated planar 3 degrees of freedom (DOF) robot and a comparable fully-actuated 2 degrees of freedom robot is presented, mainly focusing on the performances in terms of trajectories, actuator torques, and vibrations. The under-actuated system is composed of 2 active rotational joints followed by a passive rotational joint equipped with a torsional spring. The fully-actuated robot is inertial equivalent to the under-actuated manipulator: the last link is equal to the sum of the last two links of the under-actuated system. Due to the conditions on the inertia distribution and spring placement, in a simple point-to-point movement the last passive joint starts and ends in a zero-value configuration, so the 3 DOF robot is equivalent, in terms of initial and final configuration, to the 2 DOF fully-actuated robot, thus they can be compared. Results show how while the fully actuated robot is better in terms of reliable trajectory and actuator torques, the under-actuated robot wins in flexibility and vibration behavior.

A Framework for the Design of Web Service Based Clinical Management Systems to Support Inter and Intra Organizational Patient Journeys

2011 ◽  
pp. 411-426 ◽  
Author(s):  
Carolyn McGregor
Keyword(s):  
Web Service ◽  
Clinical Management ◽  
Neonatal Intensive Care ◽  
Patient Data ◽  
Management Systems ◽  
Telephone Exchange ◽  
Point To Point ◽  
Regional Australia ◽  
Bpel Processes

The clinical management of premature and ill term babies is challenged by the necessity of several inter and intra organizational patient journeys. Premature and ill-term babies born in regional Australia and Canada must be moved to another hospital with Neonatal Intensive Care Unit (NICU) facilities. NICU babies requiring surgery must be moved to a Level IV NICU for surgery. Current clinical management supports the transfer of limited patient data via paper or telephone exchange. In this article a framework for the design of Web-service-based clinical management systems to support inter and intra organizational patient journeys is presented. A series of Web services are described and integrated and coordinated through BPEL processes enabling greater support for inter- and intra-organizational transfer of patient data. This framework is demonstrated through a NICU case study. A key benefit of this framework is that it enables the establishment of “on demand” patient journeys eliminating the need to establish permanent point-to-point connections.

scholarly journals Teaching Takt -Time, Flowline, and Point-to-point Precedence Relations: A Peruvian Case Study

2017 ◽  
Vol 196 ◽  
pp. 666-673 ◽  
Author(s):  
Xavier Brioso ◽  
Danny Murguia ◽  
Alonso Urbina
Keyword(s):  
Precedence Relations ◽  
Takt Time ◽  
Point To Point

scholarly journals Comparing three scheduling methods using BIM models in the Last Planner System

2017 ◽  
Vol 9 (1) ◽  
pp. 1604-1614 ◽  
Author(s):  
Xavier Brioso ◽  
Danny Murguia ◽  
Alonso Urbina
Keyword(s):  
Teaching Strategy ◽  
Information Modeling ◽  
Management Tools ◽  
Precedence Relations ◽  
Takt Time ◽  
Last Planner System ◽  
Point To Point ◽  
Survey Responses ◽  
Last Planner

AbstractThis article presents strategies for teaching scheduling methods such as takt-time, flowlines, and point-to-point precedence relations (PTPPRs) using building information modeling (BIM) models in the Last Planner System. This article is the extended version of the article entitled “Teaching Takt-Time, Flowline and Point-to-point Precedence Relations: A Peruvian Case Study,” which has been published in Procedia Engineering (Vol. 196, 2017, pages 666–673). A case study is conducted in final year students of civil engineering at the Pontifical Catholic University of Peru. The mock-up project is an educational building that has high repetitive processes in the structural works phase. First, traditional tools such as Excel spreadsheets and 2D drawings were used to teach production system design with takt-time, flowlines, and PTPPR. Second, 3D and 4D models with Revit 2016 and Navisworks 2016 were used to integrate the previous schedules with a BIM model and to identify its strengths and weaknesses. Finally, Vico Office was used for the automation of schedules and comparison of the methods in 4D and 5D. This article describes the lectures, workshops, and simulations employed, as well as the feedback from students and researchers. The success of the teaching strategy is reflected in the survey responses from students and the final perceptions of the construction management tools presented.

Additive Manufacturing-Enabled Part Count Reduction: A Lifecycle Perspective

2018 ◽  
Vol 140 (3) ◽  
Author(s):  
Sheng Yang ◽  
Yaoyao Fiona Zhao
Keyword(s):  
Additive Manufacturing ◽  
Potential Candidate ◽  
Design Framework ◽  
Design Rules ◽  
Effect Analysis ◽  
Trade Offs ◽  
Rules And Principles ◽  
Potential Benefits ◽  
Point To Point

Part count reduction (PCR) is one of the typical motivations for using additive manufacturing (AM) processes. However, the implications and trade-offs of employing AM for PCR are not well understood. The deficits are mainly reflected in two aspects: (1) lifecycle-effect analysis of PCR is rare and scattered; (2) current PCR rules lack full consideration of AM capabilities and constraints. To fill these gaps, this paper first summarizes the main effect of general PCR (G-PCR) on lifecycle activities to make designers aware of potential benefits and risks and discusses in a point-to-point fashion the new opportunities and challenges presented by AM-enabled PCR (AM-PCR). Second, a new set of design rules and principles are proposed to support potential candidate detection for AM-PCR. Third, a dual-level screening and refinement design framework is presented aiming at finding the optimal combination of AM-PCR candidates. In this framework, the first level down-samples combinatory space based on the proposed new rules while the second one exhausts and refines each feasible solution via design optimization. A case study of a motorcycle steering assembly is considered to demonstrate the effectiveness of the proposed design rules and framework. In the end, possible challenges and limitations of the presented design framework are discussed.

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