The estimation of performance-time in simple tasks.

1938 ◽  
Vol 22 (1) ◽  
pp. 79-86 ◽  
Author(s):  
George J. Dudycha ◽  
Martha M. Dudycha
Keyword(s):  
2015 ◽  
Vol 2 (1) ◽  
pp. 35-41
Author(s):  
Rivan Risdaryanto ◽  
Houtman P. Siregar ◽  
Dedy Loebis

The real-time system is now used on many fields, such as telecommunication, military, information system, evenmedical to get information quickly, on time and accurate. Needless to say, a real-time system will always considerthe performance time. In our application, we define the time target/deadline, so that the system should execute thewhole tasks under predefined deadline. However, if the system failed to finish the tasks, it will lead to fatal failure.In other words, if the system cannot be executed on time, it will affect the subsequent tasks. In this paper, wepropose a real-time system for sending data to find effectiveness and efficiency. Sending data process will beconstructed in MATLAB and sending data process has a time target as when data will send.


2009 ◽  
Vol 35 (12) ◽  
pp. 2234-2242
Author(s):  
Ran-Li LI ◽  
Jia-Heng SHEN ◽  
Yuan JIA ◽  
Wei LI ◽  
Li-Ming WANG

2021 ◽  
pp. 1-6
Author(s):  
Suresh Kumar Vallapureddy ◽  
Gajanan Fultambkar ◽  
V. Rajeswar Rao ◽  
Vinay Kukreja ◽  
Rammohan Gurram ◽  
...  

<b><i>Background:</i></b> The supraclavicular approach to brachial plexus block is a commonly employed regional anesthesia technique for providing surgical anesthesia and postoperative analgesia for patients undergoing upper limb fractures. With ultrasound (US) guidance, the success rate of the block is increased, and complications like pneumothorax and vascular puncture are minimized. The block can be performed using single injection at the corner pocket or double injection, that is, half of the drug at the corner pocket and the remaining half at the cluster of brachial plexus divisions. <b><i>Methods:</i></b> After institutional ethics committee approval, we randomized 40 patients scheduled with fractures for elective upper extremity surgery under US-guided supraclavicular brachial plexus block. Twenty patients received 30 mL of local anesthetic at the corner pocket (group SI), and 20 patients received 30 mL of local anesthetic using the dual-injection technique in divided doses (group DI). Demographic data, time to block performance, time to sensory and motor block, total anesthesia-related time (TART), block success, and failure were compared between both groups. <b><i>Results:</i></b> The demographic data were comparable between both groups. The DI group had a significantly faster onset than the SI group (<i>p</i> = 0.0172). There was a statistically significant lesser performance time in group SI than in group DI (<i>p</i> &#x3c; 0.034). The sensory and motor block achieved was comparable between both groups. <b><i>Conclusion:</i></b> The success rates in both the SI and DI techniques are comparable. The DI technique results in a faster onset and hence a shorter TART; however, it may not be clinically relevant.


Author(s):  
Pengzhen Lu ◽  
Dengguo Li ◽  
Tao Hong ◽  
Yangrui Chen ◽  
Qingtian Shi

2021 ◽  
Vol 108 (Supplement_2) ◽  
Author(s):  
S Palaniappan ◽  
R Soiza ◽  
S Moug ◽  
P Myint

Abstract Introduction Frail patients have increased mortality after surgery. However, it is not known if pre-operative process measures such as antibiotic administration, time to CT and time to surgery are influenced by patient frailty. Method The Emergency Laparotomy and Laparoscopy Scottish Audit (ELLSA) assessed outcome after emergency surgery across Scottish hospitals (November 2017 – October 2018). Frailty was measured using the 7-point Clinical Frailty Score (CFS). Outcome measures were antibiotic provision for sepsis, admission to CT time, admission to surgery time, CT request to performance time and CT request to surgery time. Results 1302 patients (median age 63 years [IQR 49-74]; 49% male) with complete data were included. Median time from admission to CT and surgery increased between those with CFS 1 to 6/7 from 597 to 1724 minutes (p &lt; 0.0001) and 1556 to 4120 minutes (p &lt; 0.0001) respectively. Time from CT request to surgery also significantly increased with CFS (p &lt; 0.042). There was no significant association between CFS and antibiotic administration or CT request to performance. Conclusions Frail patients have to wait longer for CT scan requests and surgery, but frailty was not associated with antibiotic administration or delays in CT request to performance time. Possible explanations include frailty-related challenges making correct diagnoses and optimal management plans.


1988 ◽  
Vol 32 (16) ◽  
pp. 1060-1064 ◽  
Author(s):  
K. Ronald Laughery ◽  
Susan Dahl ◽  
Jonathan Kaplan ◽  
Rick Archer ◽  
Gail Fontenelle

This paper discusses two of the six software tools which are being developed as part of the Army Research Institute's MANPRINT Methods development program. The first tool discussed here is known as the System Performance and RAM Constraints Aid or SPARC. This tool permits system designers to determine levels of subfunction performance which are required to achieve function and higher level mission requirements. These levels of subfunction and function performance then serve as requirements which are fed into the second tool, the Manpower Systems Evaluation Aid (MAN-SEVAL). MAN-SEVAL takes as input the system design and then predicts the operator and maintainer manpower required to achieve the required levels of task and function performance. For maintenance manpower evaluation, MAN-SEVAL considers component failure rates, time to perform maintenance, and the mission scenario. For operator manpower and to estimate maintenance task times, MAN-SEVAL conducts an analysis of workload, control/display accessability, and maximum acceptable performance time to allocate tasks across crewmembers. Because all manpower requirements are truly driven by system performance requirements, these two tools are being developed collectively with common data bases and software design. While they are currently being developed for the Army, they will be useful general purpose manpower analysis tools.


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