scholarly journals Development and Validation of a Measurement System for Laparoscopic Surgical Procedures

2020 ◽  
Vol 13 (4) ◽  
pp. 191-200 ◽  
Author(s):  
Koki EBINA ◽  
Takashige ABE ◽  
Shunsuke KOMIZUNAI ◽  
Teppei TSUJITA ◽  
Kazuya SASE ◽  
...  
Keyword(s):  
Surgical Procedures ◽  
Measurement System ◽  
Laparoscopic Surgical Procedures ◽  
Development And Validation

Development and Validation of an On-Wing Engine Thrust Measurement System

2017 ◽  
Author(s):  
Marc Bauer ◽  
Jens Friedrichs ◽  
Detlev Wulff ◽  
Christian Werner-Spatz
Keyword(s):  
Measurement System ◽  
Standard Procedure ◽  
Flight Test ◽  
Engine Thrust ◽  
Thrust Measurement ◽  
Ground Test ◽  
Engine Maintenance ◽  
The Cost ◽  
Development And Validation ◽  
Engine Condition

Maintenance on aircraft engines is usually performed on an on-condition basis. Monitoring the engine condition during operation is an important prerequisite to provide efficient maintenance. Engine Condition Monitoring (ECM) has thus become a standard procedure during operation. One of the most important parameters, the engine thrust, is not directly measured, however, and can therefore not be monitored, which makes it difficult to distinguish whether deteriorating trends e.g. in fuel comsumption must be attributed to the engine (e.g. due to thermodynamic wear) or to the aircraft (e.g. due to increased drag). Being able to make this distinction would improve troubleshooting and maintenance planning and thus help to reduce the cost of ownership of an aircraft. As part of the research project APOSEM (Advanced Prediction of Severity effects on Engine Maintenance), Lufthansa Technik (LHT) and the Institute of Jet Propulsion and Turbomachinery of Technische Universität Braunschweig develop a method for direct measurement of engine thrust during the operation. In this paper, the design process of the On-Wing (OW) Measurement System is presented, including the validation in labratory tests, the mechanical and thermal calibration as well as the final ground test during an engine test run at LHT test cell and the work on the flight test certification.

Minimally Invasive: Minimally Reimbursed? An Examination of Six Laparoscopic Surgical Procedures

2005 ◽  
Vol 12 (3) ◽  
pp. 261-287 ◽  
Author(s):  
Adam R. Roumm ◽  
Laura Pizzi ◽  
Neil I. Goldfarb ◽  
Herbert Cohn
Keyword(s):  
Minimally Invasive ◽  
Surgical Procedures ◽  
Laparoscopic Surgical Procedures

Performance Assessment in Training Systems: Methods and Application

1986 ◽  
Vol 30 (3) ◽  
pp. 280-284
Author(s):  
S.T. Breidenbach ◽  
A.P. Ciavarelli ◽  
R. Sievers ◽  
M.G. Lilienthal
Keyword(s):  
Performance Assessment ◽  
Measurement System ◽  
Reliability And Validity ◽  
Training System ◽  
Performance Measurement System ◽  
Training Systems ◽  
Combat Training ◽  
Systematic Development ◽  
Validity Tests ◽  
Development And Validation

This paper offers an improved methodology for systematic development and validation of a performance measurement system. Application of this methodology is presented in the context of a measurement system designed to assess aircrew performance during air-to-air combat training conducted on the Navy's Tactical Aircrew Combat Training System. Procedures for identifying the purpose and appropriate application of measures, formatting operationally useful training feedback displays, and conducting reliability and validity tests are presented.

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