scholarly journals The evaluation of airfield pavements in light of applicable normative documents

2018 ◽  
Vol 2018 (12) ◽  
pp. 40-51
Author(s):  
Mariusz Wesołowski ◽  
Paweł Pietruszewski ◽  
Adam Poświata ◽  
Danuta Kowalewska
Keyword(s):  
Measurement Data ◽  
Weather Conditions ◽  
Construction Technology ◽  
Normative Documents ◽  
Measuring Devices ◽  
Adverse Weather ◽  
Correct Execution ◽  
Normative Requirements ◽  
Evenness Condition ◽  
Pavement Construction

Airfield pavement evenness is, according to applicable normative documents, one of the basic operating parameters, which characterize each airfield functional element. Evenness, in fact the lack of it, determines not only comfort of aircraft movement along an airfield pavement, but also influences the magnitude of the dynamic impacts on the pavement, hence, the safety of air operations. In addition, evenness condition changing as a result of aircraft operation, adverse weather conditions or inappropriate airfield pavement construction technology leads to deviations from the desired condition in the form of longitudinal and transverse unevenness. Pursuant to the applicable normative requirements, measurements on airfield facilities can be executed using a planograph or a staff and a wedge. The used measuring devices differ from each other in terms of dimensions and permissible single unevenness. Regular and correct execution of tests is a very important factor improving air operation safety, but also enabling the designation of zones (areas) with quicker pavement degradation. If the obtained measurement data is not sufficiently reliable, they may consequently lead to making incorrect decisions, which can ultimately impact the safety of air operations.

Quality Assurance Methods Applied For Exposed-Aggregate Concrete Pavement Construction

2021 ◽  
Author(s):  
Adam Glinicki ◽  
Michal Glinicki
Keyword(s):  
Quality Assurance ◽  
Early Stage ◽  
Traffic Noise ◽  
Cost Effective ◽  
Weather Conditions ◽  
Special Treatment ◽  
Aggregate Concrete ◽  
Adverse Weather ◽  
Pavement Construction

The exposed aggregate pavement technology for construction of concrete highways is used in European countries, including Poland, mostly for heavy trafficked roads. It is mainly a two-lift slip-form technology with a special treatment of the top surface after the final smoothing operation. This is a demanding technology that leaves a little margin for mistakes. When properly done the pavement layer with exposed aggregates ensures designed skid resistance for vehicle wheels even in adverse weather conditions without excessive traffic noise. The challenge is to provide its cost-effective long term performance including both the adequate roughness and the desired smoothness of the pavement. The paper presents tools and methods for construction quality assurance specific for exposed aggregate concrete pavements. Required monitoring of the stability of concrete mix properties is discussed. The importance of concrete curing is analyzed in respect to the long term durability in wet-freeze regions with heavy use of deicing salts. Macrotexture assessment at the early stage of pavement construction is seen as the key factor for assurance of the proper skidding resistance. Local evaluation of smoothness is also a useful approach to assure the target IRI. Examples of quality assurance efforts applied on concrete highways recently constructed in Poland are presented.

SOLUTIONS ENSURING SAFETY DURING TRANSPORT OF STATE VIPS BY MILITARY AIRFCRAFT (PART 1)

2020 ◽  
Vol 115 (2) ◽  
pp. 20-40
Author(s):  
Ryszard BARTNIK ◽  
Dariusz TATAROWSKI
Keyword(s):  
Environmental Factors ◽  
Weather Conditions ◽  
Military Aircraft ◽  
Normative Documents ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
Depth Analysis ◽  
National Welfare ◽  
Transport Safety ◽  
Normative Documentation

It should be observed that for the sake of national welfare, while transporting state VIPs by military aircraft, the level of risk that is acceptable is lower than in the case of other passengers. Consequently, normative documentation regarding such transport regulates a range of issues that is considerably wider and more precisely defined than when transporting other passengers, relying on the principle “safety above all.” Regulations contained in normative documents concerning the transport of state VIPs by military aircraft are to protect not only against human mistakes, which might cause an air incident during such flights. Normative documents also regulate additional requirements that concern (1) aviation equipment used during transport of state VIPs by military aircraft (so as to limit the risk of mechanical failure) and (2) in-depth analysis of environmental factors (so as to reduce threat to transport safety as a result of adverse weather conditions).

Using synthetic data for person tracking under adverse weather conditions

2021 ◽  
pp. 104187
Author(s):  
Abdulrahman Kerim ◽  
Ufuk Celikcan ◽  
Erkut Erdem ◽  
Aykut Erdem
Keyword(s):  
Synthetic Data ◽  
Weather Conditions ◽  
Person Tracking ◽  
Adverse Weather Conditions ◽  
Adverse Weather

scholarly journals Ship Handling in Unprotected Waters: A Review of New Technologies in Escort Tugs to Improve Safety

2021 ◽  
Vol 2 (1) ◽  
pp. 46-62
Author(s):  
Santiago Iglesias-Baniela ◽  
Juan Vinagre-Ríos ◽  
José M. Pérez-Canosa
Keyword(s):  
High Performance ◽  
New Technologies ◽  
Weather Conditions ◽  
Hull Form ◽  
Best Available Technologies ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
New Type ◽  
Technological Challenge ◽  
And Performance

It is a well-known fact that the 1989 Exxon Valdez disaster caused the escort towing of laden tankers in many coastal areas of the world to become compulsory. In order to implement a new type of escort towing, specially designed to be employed in very adverse weather conditions, considerable changes in the hull form of escort tugs had to be made to improve their stability and performance. Since traditional winch and ropes technologies were only effective in calm waters, tugs had to be fitted with new devices. These improvements allowed the remodeled tugs to counterbalance the strong forces generated by the maneuvers in open waters. The aim of this paper is to perform a comprehensive literature review of the new high-performance automatic dynamic winches. Furthermore, a thorough analysis of the best available technologies regarding towline, essential to properly exploit the new winches, will be carried out. Through this review, the way in which the escort towing industry has faced this technological challenge is shown.

Statistical analysis and critical review of navigational accidents in adverse weather conditions

2018 ◽  
Vol 163 ◽  
pp. 502-517 ◽  
Author(s):  
N.P. Ventikos ◽  
A.D. Papanikolaou ◽  
K. Louzis ◽  
A. Koimtzoglou
Keyword(s):  
Statistical Analysis ◽  
Critical Review ◽  
Weather Conditions ◽  
Adverse Weather Conditions ◽  
Adverse Weather

Gendered Experiences of Mobility

Transfers ◽  
2013 ◽  
Vol 3 (3) ◽  
pp. 79-98 ◽  
Author(s):  
Shahnaz Huq-Hussain ◽  
Umme Habiba
Keyword(s):  
Middle Class ◽  
Travel Behavior ◽  
Weather Conditions ◽  
Capital City ◽  
Mobility Patterns ◽  
Security Issues ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
The City ◽  
Detailed Picture

This article examines the travel behavior of middle-class women in Dhaka, the capital city of Bangladesh and one of the world's largest and most densely populated cities. In particular, we focus on women's use of non-motorized rickshaws to understand the constraints on mobility for women in Dhaka. Primary research, in the form of an empirical study that surveyed women in six neighborhoods of Dhaka, underpins our findings. Our quantitative and qualitative data presents a detailed picture of women's mobility through the city. We argue that although over 75 percent of women surveyed chose the rickshaw as their main vehicle for travel, they did so within a complex framework of limited transport options. Women's mobility patterns have been further complicated by government action to decrease congestion by banning rickshaws from major roads in the city. Our article highlights the constraints on mobility that middle-class women in Dhaka face including inadequate services, poorly maintained roads, adverse weather conditions, safety and security issues, and the difficulty of confronting traditional views of women in public arenas.

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