Application of Mathematical Modeling to Study Near-Field Pressure Pulsations of a Near-Future Prototype Supersonic Business Aircraft

2022 ◽  
Vol 35 (1) ◽  
Author(s):  
A. S. Kozelkov ◽  
D. Yu. Strelets ◽  
M. S. Sokuler ◽  
R. H. Arifullin
Keyword(s):  
Mathematical Modeling ◽  
Near Field ◽  
Pressure Pulsations ◽  
Near Future

Seismic retrofit for the truss bridges of the Seto-Ohashi Bridges

2016 ◽  
Author(s):  
Susumu Fukunaga
Keyword(s):  
Seismic Design ◽  
Large Scale ◽  
Near Field ◽  
Seismic Retrofit ◽  
Box Section ◽  
Truss Bridges ◽  
Bolt Holes ◽  
Near Future ◽  
Retrofit Design

In original seismic design of the Seto-Ohashi Bridges, an inland near-field earthquake was not considered. And there is concern that large-scale earthquakes would occur in the near future. Therefore seismic retrofit for truss bridges of the Seto-Ohashi Bridges has started. In the seismic retrofit design for the truss bridges, it was decided that seismic response of overall bridge was reduced firstly and the truss members were strengthened by additional stiffeners secondly. The stiffeners were attached to the truss members by bolting, because it was difficult to ensure quality of field welding. As inner surface of the closed box-section truss members has no coating, drilling bolt holes in the members was thought to increase the probability of corrosion of the members. Therefore it was decided to apply airtightness measures for the inside of the closed box-section members after their drying.

scholarly journals Analysis of Key Factors of a SARS-CoV-2 Vaccination Program: A Mathematical Modeling Approach

Epidemiologia ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 140-161
Author(s):  
David Martínez-Rodríguez ◽  
Gilberto Gonzalez-Parra ◽  
Rafael-J. Villanueva
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Mechanisms Of Action ◽  
High Impact ◽  
Key Factors ◽  
Vaccination Programs ◽  
Vaccine Administration ◽  
Health Institutions ◽  
The Impact ◽  
Near Future

The administration of vaccines against the coronavirus disease 2019 (COVID-19) started in early December of 2020. Currently, there are only a few approved vaccines, each with different efficacies and mechanisms of action. Moreover, vaccination programs in different regions may vary due to differences in implementation, for instance, simply the availability of the vaccine. In this article, we study the impact of the pace of vaccination and the intrinsic efficacy of the vaccine on prevalence, hospitalizations, and deaths related to the SARS-CoV-2 virus. Then we study different potential scenarios regarding the burden of the COVID-19 pandemic in the near future. We construct a compartmental mathematical model and use computational methodologies to study these different scenarios. Thus, we are able to identify some key factors to reach the aims of the vaccination programs. We use some metrics related to the outcomes of the COVID-19 pandemic in order to assess the impact of the efficacy of the vaccine and the pace of the vaccine inoculation. We found that both factors have a high impact on the outcomes. However, the rate of vaccine administration has a higher impact in reducing the burden of the COVID-19 pandemic. This result shows that health institutions need to focus on increasing the vaccine inoculation pace and create awareness in the population about the importance of COVID-19 vaccines.

scholarly journals Near Future Perspective of ESBL-Producing Klebsiella pneumoniae Strains Using Mathematical Modeling

2022 ◽  
Vol 130 (1) ◽  
pp. 111-132
Author(s):  
Cemile Bagkur ◽  
Emrah Guler ◽  
Bilgen Kaymakamzade ◽  
Evren Hincal ◽  
Kaya Suer
Keyword(s):  
Mathematical Modeling ◽  
Klebsiella Pneumoniae ◽  
Future Perspective ◽  
Near Future

Use of Methods of Mathematical Modeling to Analyze Low-Frequency Pressure Pulsations in the Continuous Run of High-Head HPP

2015 ◽  
Vol 49 (2) ◽  
pp. 90-97 ◽  
Author(s):  
A. V. Minakov ◽  
D. V. Platonov ◽  
A. A. Dekterev ◽  
A. V. Sentyabov ◽  
I. M. Pylev ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Low Frequency ◽  
Pressure Pulsations ◽  
High Head

Implementing New Automated Ticketing Technology at Virginia Railway Express

2012 ◽  
Author(s):  
Chris Henry ◽  
Steven Grant
Keyword(s):  
Near Field ◽  
Near Field Communication ◽  
Federal Employees ◽  
Major Focus ◽  
Identity Verification ◽  
Electronic Payments ◽  
Future System ◽  
Near Future ◽  
Fare Evasion

Virginia Railway Express (VRE) is at a crossroads at a key time with its current technology. In the near future, VRE will be required to replace its existing Automated Fare Collection (AFC) system. While this may not initially sound so different from what all rail agencies must eventually go through, ensuring that the system can be integrated into its neighboring Washington Metropolitan Area Transit Authority’s (WMATA) impending New Electronic Payments Program (NEPP) is a completely different story, and for many reasons. VRE is a key regional partner of WMATA and, as such, the two work hand-in-hand to ensure the interoperability between the two systems is maximized for the passengers who ride both services. Key to this is NEPP as an eventual replacement of WMATA’s SmarTrip® program. Since the majority of VRE’s ridership is Federal employees who carry PIV (Personal Identity Verification)/CAC (Common Access Card) cards and are making their way into the nation’s capital from Virginia and Maryland, the SmarTrip® program has been a major focus for VRE. While the NEPP program has several years before it goes live, it presents VRE with a valuable opportunity to review its current AFC system and use the interim to implement various concepts of operations for a future system. As such, VRE has become a willing partner for WMATA as a host for technology proof-of-concepts that will aid both VRE and WMATA in the long term. VRE is looking into hosting various technology options to pilot at key stations that may include mobile ticketing, Near Field Communication (NFC), or PIV/CAC cards as forms of payment, as well as proof of payment. As an open-gated system, VRE must tackle the problem of fare evasion, so looking to maximize its proof-of-payment capabilities with the latest technology is key. VRE would like to share with the rail community its thoughts and ideas for proof-of-concepts to utilize the latest payment technologies, as well as discuss its plans on interoperability with WMATA to assist agencies with similar challenges.

Planning and Designing a Marine Hospital Facility for Use in Times of Disaster

2008 ◽  
Author(s):  
Takahiro Kondo ◽  
Takeo Kondo ◽  
Kazukiyo Yamamoto ◽  
Chiaki Sato ◽  
Tetsuo Kayama
Keyword(s):  
Metropolitan Area ◽  
Near Field ◽  
Medical Personnel ◽  
Tokyo Bay ◽  
Medical Support ◽  
Marine Transportation ◽  
Earthquake Disaster ◽  
Tokyo Metropolitan Area ◽  
Hospital Facility ◽  
Near Future

Medical support using marine transportation during an earthquake disaster has been attracting attention because the land transportation system is expected to be paralyzed at such times. An earthquake measuring magnitude 7 is predicted to occur in Tokyo Bay in the near future. The aim of this study is to develop an earthquake-proof design for a marine hospital facility, and to calculate the required capacity and number of medical personnel. The scale of the marine hospital facility was determined based on anticipated damage caused by a near-field earthquake in Tokyo Metropolitan Area. The need for preparation of heliports and boat piers was identified.

scholarly journals Analysis of key factors of a SARS-CoV-2 vaccination program: A mathematical modeling approach

2021 ◽  
Author(s):  
David Martínez-Rodríguez ◽  
Gilberto Gonzalez-Parra ◽  
Rafael-J. Villanueva-Micó
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Mechanisms Of Action ◽  
High Impact ◽  
Future Scenarios ◽  
Key Factors ◽  
Vaccination Programs ◽  
Health Institutions ◽  
The Impact ◽  
Near Future

The administration of vaccines against the coronavirus disease 2019 (COVID-19) just started in early December of 2020. Currently, there are only a few approved vaccines, each with different efficacies and mechanisms of action. Moreover, vaccination programs in different regions may vary due to differences in implementation, for instance, simply the availability of the vaccine. In this article, we study the impact of the pace of vaccination and the intrinsic efficacy of the vaccine on prevalence, hospitalizations, and deaths related to the SARS-CoV-2 virus. Then we study different potential future scenarios regarding the burden of the COVID-19 pandemic in the near future. We construct a compartmental mathematical model and use computational methodologies to study these different scenarios. Thus, we are able identify some key factors to reach the aims of the vaccination programs. We use some metrics related to the outcomes of the COVID-19 pandemic in order to assess the impact of the efficacy of the vaccine and the pace of the vaccine inoculation. We found that both factors have a high impact on the outcomes. However, the rate of vaccine administration has a higher impact in reducing the burden of the COVID-19 pandemic. This result shows that health institutions need to focus in increasing the vaccine inoculation pace and create awareness in the population about the importance of COVID-19 vaccines.

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