A Simulation Study on Boarding and Deplaning Utilizing Two-Doors for a Narrow Body Aircraft

2016 ◽  
Vol 3 (2) ◽  
pp. 25-35
Author(s):  
Yuhang Liang ◽  
Massoud Bazargan
Keyword(s):  
Simulation Study ◽  
Technological Innovations ◽  
Significant Time ◽  
Time Savings ◽  
Compare And Contrast ◽  
Technological Flexibility

Boarding and deplaning processes are major and longest metrics for aircraft turnaround times. Currently, many studies have been conducted to develop more efficient strategies to reduce the boarding times. However, these studies, primarily focus on one-door boarding strategy for narrow body aircraft. Recent technological innovations provide the flexibility to add an extension to existing jet bridges making it possible to board and deplane through the front and rear doors of a narrow body aircraft. Motivated by this technological flexibility, the current study employs simulation approaches to examine, compare and contrast boarding and deplaning times utilizing one and two-door jet bridges. Different boarding and deplaning strategies are studied in this research. The results show significant time savings can be achieved for both boarding and deplaning for two-door jet bridges compared to current one-door practices.

scholarly journals Streamlining SAE Reporting for CTN Trials Results In Significant Time Savings

2009 ◽  
Vol 15 (2) ◽  
pp. 97
Author(s):  
T.A. Buck ◽  
P. James ◽  
J.E. Levine ◽  
A. Ramakrishnan
Keyword(s):  
Significant Time ◽  
Time Savings

Influence Coefficients Obtained by Hammer Beat Permit Significant Time Savings When Balancing Simple Flexible Rotors

1999 ◽  
Author(s):  
D. Wiese ◽  
M. Breitwieser
Keyword(s):  
Influence Coefficient ◽  
Significant Time ◽  
Flexible Rotors ◽  
Influence Coefficients ◽  
Flexible Roll ◽  
Influence Coefficient Method ◽  
Time Savings ◽  
Positive Results ◽  
Coefficient Method

Abstract The following paper presents a method for balancing simple flexible rotors with the help of influence coefficients obtained by hammer beat. The method permits time savings of approx. 50% compared to the conventional influence coefficient method. Initial positive results obtained on a flexible roll are also presented.

scholarly journals Measurement of Overall Performance Effectiveness in Setup Improvement

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Shye-Nee Low ◽  
Siu-Hou Chong ◽  
Hui-Yee Sim ◽  
Solehhudin Razalli ◽  
Shahrul Kamaruddin
Keyword(s):  
Injection Molding ◽  
Setup Time ◽  
Process Performance ◽  
Performance Effectiveness ◽  
Significant Time ◽  
Before And After ◽  
Overall Performance ◽  
Time Savings

This study aimed to improve the setup process of injection molding machines by using the developed setup improvement methodology. Overall performance effectiveness (OPE) was used to evaluate the setup improvement. A case study was tested on the application of the developed setup improvement methodology. A 50.1% reduction in setup time was attained by the developed methodology, and significant time savings were achieved with minimum investment. Comparisons between before and after improvement implementation were conducted through OPE to verify the improvement. In terms of OPE, the setup performance in the case study considered an acceptable value of 60.45%. The setup process performance of the developed setup improvement methodology was judged in terms of effectiveness. Results therefore indicate that OPE measurement is an effective way to analyze the efficiency of a single setup process.

Offline Subsea Wellhead MODU Operations Provide Significant Time Savings

2003 ◽  
Author(s):  
William P. Kenda ◽  
Timothy J. Allen ◽  
Ryan R. Herbel
Keyword(s):  
Significant Time ◽  
Time Savings

Effect of route guidance and route scheduling systems on courier pickup and delivery operations: a simulation study

2001 ◽  
Vol 28 (1) ◽  
pp. 77-84 ◽  
Author(s):  
Omar H Choudhry ◽  
Ata M Khan
Keyword(s):  
Simulation Study ◽  
Intelligent Transportation Systems ◽  
Route Planning ◽  
Intelligent Transportation ◽  
Transportation Systems ◽  
Operating Conditions ◽  
Route Optimization ◽  
Pickup And Delivery ◽  
Route Guidance ◽  
Time Savings

The efficiency of pickup-and-delivery (P&D) activities of urban courier is adversely impacted by traffic congestion and lack of logistical innovations. The high frequency of P&D tasks offers the opportunity to achieve substantial savings in time through the implementation of route optimization, route guidance, and scheduling innovations. These innovations would require the intelligent transportation systems (ITS) technologies for their implementation. This paper describes how such time savings can be obtained. For testing the effect of network and operating conditions on time savings, a simulation study was undertaken on synthesized networks and logistical requirements. The results show that route guidance and scheduling systems yield highly significant time savings in the P&D operation of the courier industry.Key words: courier, intelligent transportation systems, route guidance, route planning, simulation.

Abstract WP282: Use of Emergent Ambulance Transport With Lights and Siren Leads to Significant Time Savings for Inter-Facility Transfers of Patients With Large Vessel Occlusion

Stroke ◽  
2020 ◽  
Vol 51 (Suppl_1) ◽  
Author(s):  
Nathaniel R Hunt ◽  
Mollie McDermott ◽  
Scott F Dye ◽  
Cemal B Sozener
Keyword(s):  
Small Sample ◽  
Large Vessel ◽  
P Value ◽  
Large Vessel Occlusion ◽  
Stroke Patients ◽  
Transport Time ◽  
Vessel Occlusion ◽  
Significant Time ◽  
The Mean ◽  
Time Savings

Introduction: When emergency medical services (EMS) responds to a field call for a patient experiencing stroke symptoms, the response is emergent, necessitating the use of lights and siren (L&S) to allow for expedited transport to a stroke-capable center. With the expanded use of endovascular therapy (EVT) for large-vessel occlusion (LVO), many stroke-capable centers are transferring larger numbers of LVO patients to EVT-capable centers for definitive care. Interestingly, many EMS systems do not respond to or transport inter-facility transfers emergently with L&S. This can potentially lead to delays in care and worse clinical outcomes. Given increased scrutiny surrounding the safety and utility of L&S transport among EMS providers, we investigated the difference between emergent and non-emergent transfer of confirmed LVO stroke patients from two institutions with varied distances and traffic patterns. Methods: A retrospective analysis was performed of 127 consecutive inter-facility transfers for LVO from two facilities, Hospital A (38.5 miles) and Hospital B (5.5 miles), to the University of Michigan Comprehensive Stroke Center over 3 years and 2 years respectively. Transfers by helicopter (17/127; 13.4%) and those without available EMS data (9/127; 7.1%) were excluded. Final review included 50 cases from Hospital A and 51 from Hospital B. Run times and use of L&S during transport were collected. A t-test was used to examine whether the observed differences in transport times were statistically significant. Results: Of the 50 transfers from Hospital A, 22 were transported without L&S use and 28 with L&S. The mean transport time was 44 minutes versus 35 minutes, respectively. From Hospital B, there were 14 transfers transported without L&S use and 37 with L&S. The mean transport time was 15 minutes versus 9 minutes, respectively. For both samples, p-value was <0.01. Conclusion: Despite a small sample size, this analysis demonstrates significant time savings using L&S during inter-facility transfer of stroke patients with confirmed LVO. While inherent risk is associated with the use of L&S during EMS transport, judicious use for confirmed time-sensitive indications seems warranted.

scholarly journals Next-generation sequencing: applications beyond genomes

2008 ◽  
Vol 36 (5) ◽  
pp. 1091-1096 ◽  
Author(s):  
Samuel Marguerat ◽  
Brian T. Wilhelm ◽  
Jürg Bähler
Keyword(s):  
Next Generation Sequencing ◽  
Dna Sequencing ◽  
Cost Effective ◽  
Biological Research ◽  
Technological Innovations ◽  
Next Generation ◽  
Complex Samples ◽  
Genomic Studies ◽  
Compare And Contrast ◽  
Generation Sequencing

The development of DNA sequencing more than 30 years ago has profoundly impacted biological research. In the last couple of years, remarkable technological innovations have emerged that allow the direct and cost-effective sequencing of complex samples at unprecedented scale and speed. These next-generation technologies make it feasible to sequence not only static genomes, but also entire transcriptomes expressed under different conditions. These and other powerful applications of next-generation sequencing are rapidly revolutionizing the way genomic studies are carried out. Below, we provide a snapshot of these exciting new approaches to understanding the properties and functions of genomes. Given that sequencing-based assays may increasingly supersede microarray-based assays, we also compare and contrast data obtained from these distinct approaches.

A Parametric and Computational Aerothermal Investigation of Squealer Tip Geometry in an Axial Turbine: A Parametric Approach Suitable for Future Advanced Tip Carving Optimizations

2016 ◽  
Author(s):  
H. Maral ◽  
C. B. Senel ◽  
L. Kavurmacioglu
Keyword(s):  
Gas Turbines ◽  
Numerical Solutions ◽  
Computational Study ◽  
Axial Flow ◽  
Tangential Direction ◽  
Design Parameters ◽  
Parametric Approach ◽  
Significant Time ◽  
Blade Tip ◽  
Time Savings

A parametric computational study has been conducted in order to investigate the effect of a squealer geometry in axial flow gas turbines. Although the present investigation deals with the conventional squealer tip design, the main goal of the parametric approach is to obtain significant time savings in the computational analysis of future tip mitigation schemes. At this preliminary stage, both width and height of the conventional squealer tip have been introduced as design parameters. Computational Fluid Dynamics (CFD) analysis has been conducted for a linear turbine cascade arrangement. Computations have been performed for a single blade passage considering periodicity in the tangential direction with no relative motion between blade and the casing. In order to generate the mesh, an effective parametric grid generation has been performed using a multizone structured mesh. Numerical solutions have been obtained by solving the 3D, incompressible, steady and turbulent form of the Reynolds-Averaged Navier-Stokes (RANS) equations using the general purpose solver ANSYS CFX. Two equation turbulence model, Shear Stress Transport (SST) has been used. Sixteen different squealer tip geometries were modeled parametrically and their performance has been compared in terms of both aerodynamic loss and heat transfer to blade tip. In addition to significant time savings for the squealer tip modeling and gridding, the specific parametric approach paves the way for aerothermal optimization of advanced squealer geometries such as optimized tip carving based geometries. Results obtained in this study are going to be used for the aerothermal optimization of the squealer blade tip geometry.

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