Characterization of Highway Traffic Noise Generated by Rigid Pavement Contraction Joints

2003 ◽  
Author(s):  
Lawrin Ellis ◽  
Christopher Niezrecki ◽  
David Bloomquist
Keyword(s):  
Traffic Noise ◽  
Test Methods ◽  
Concrete Pavements ◽  
Highway Traffic ◽  
Rigid Pavement ◽  
Contraction Joints ◽  
The Difference ◽  
Current Concerns ◽  
The Impact

Contraction joints in rigid (concrete) pavements are required to permit expansion of each monolithic section of roadway. At higher speeds, the major source of highway noise is attributed to vehicle tire/roadway interaction. Current concerns about limiting the impact of highway traffic noise, has forced transportation agencies to consider strategies to control noise generated by tire/roadway interaction. Within this work the difference in noise generated by 1/4 versus 3/8-inch joint widths is conducted. The study focuses on passenger vehicles including a sedan and a light duty van/truck. Both vehicle in-cabin and roadside noise levels are measured for vehicle speeds of 50, 60, and 70 miles per hour. For the sedan, the minimum and maximum observed in-cabin differences were determined to be 1.08 and 1.82 dB(A), respectively. Minimum and maximum observed roadside differences are 1.19 and 2.58 dB(A), respectively. Van tests resulted in minimum and maximum observed in-cabin differences of 0.60 and 1.09 dB(A) and minimum and maximum observed roadside differences of 1.05 and 3.18 dB(A), respectively. This paper contains details of reference standards, test methods, and the results obtained.

Characterization of highway traffic noise generated by rigid pavement contraction joints

2003 ◽  
Vol 113 (4) ◽  
pp. 2245-2245
Author(s):  
Lawrin T. Ellis ◽  
Christopher Niezrecki ◽  
David Bloomquist
Keyword(s):  
Traffic Noise ◽  
Highway Traffic ◽  
Rigid Pavement ◽  
Contraction Joints

Characterization of Traffic Noise and Honking Assessment of an Indian Urban Road

2018 ◽  
Vol 17 (04) ◽  
pp. 1850031 ◽  
Author(s):  
Ritesh Vijay ◽  
T. Chakrabarti ◽  
Rajesh Gupta
Keyword(s):  
Traffic Noise ◽  
Traffic Monitoring ◽  
Traffic Volume ◽  
Time Interval ◽  
Highway Traffic ◽  
Noise Levels ◽  
Additional Noise ◽  
Road Width ◽  
The Impact

To study the traffic noise on an Indian urban highway, traffic noise levels (Leq, Lpeak, Lmax and Lmin), traffic volume, speed and honking incidents were measured in peak traffic hours in the morning and evening. An attempt has been made to characterize the traffic noise including the impact of honking. Honking of horn was positively correlated with Leq and negatively correlated with traffic speed. In case of traffic volume and road width, no significant correlation was established with Leq. Based on the observed honking and Leq in each time interval, statistical analysis was performed for assessing the impact of honking on traffic noise and its estimation through trend analysis. Further, quantification of honking noise was carried out considering frequency analysis of audio spectrum of traffic noise. Both the analyzes confirm the honking contributed an additional noise of 1–4[Formula: see text]dB(A) over and above the traffic monitoring noise. The study suggests that honking noise must be included as a factor while monitoring traffic noise in some places where honking is common practice. This study will help in characterizing the traffic noise and the impact of honking for further abatement studies.

Noise reduction of enhanced acoustic balconies on a high-rise building block

2021 ◽  
Vol 263 (1) ◽  
pp. 5327-5334
Author(s):  
SK Tang ◽  
Rudolf YC Lee
Keyword(s):  
Noise Reduction ◽  
Natural Ventilation ◽  
Traffic Noise ◽  
Elevation Angle ◽  
Noise Levels ◽  
Indoor Space ◽  
New Device ◽  
Air Inlet ◽  
The Difference ◽  
The Impact

A new device called 'enhanced acoustic balcony' is installed in a new housing estate in Hong Kong. It is intended to help reduce the impact of traffic noise on the residents. This balcony is basically an enlarged form of a plenum window and with three openings. Apart from the outdoor air inlet, there is the balcony door and a side-hung window on the interior balcony wall for natural ventilation of the indoor space. Sound absorption of NRC 0.7 is installed on the balcony ceiling and its sidewall facing the incoming traffic noise and an inclined panel is installed outside the balcony to provide noise screening. A site measurement of its noise reduction is carried out in the present study in a newly completed housing block. A 28 m long loudspeaker array is used as the sound source. The indoor noise levels are measured according to ISO standard. The results show that the difference between indoor and outdoor noise levels in the presence of this balcony form varies over a relatively narrow range between 10 to 13 dBA for an elevation angle from 25 to 60 deg. There is a weak increase of the noise level difference with elevation angle.

scholarly journals G. E. LESSING'S LAOCOON: THE POTENTIAL OF THE SEMANTIC APPROACH

2020 ◽  
pp. 23-27
Author(s):  
H. D. Mylenka
Keyword(s):  
Large Array ◽  
Semantic Approach ◽  
Key Concepts ◽  
Different Types ◽  
The Difference ◽  
Organic Combination ◽  
The Impact ◽  
Semantic Aspect ◽  
Theoretical Developments

Despite the large array of studies of the theoretical heritage of the German enlightener, this aspect has been most fully developed in the works of I.G. Gerder (article "Critical forests"), R. Ingarden (monograph "Research in aesthetics") and E. Basin (monograph "Art and communication"). In updating the potential of the semantic problematic of Laocoon, considerable assistance is provided by the recourse to studies in which the fruitfulness and relevance of this aspect of the Lessing tract is emphasized to one degree or another. There is an attempt to analyze, in one theoretical space, works on Lessing theory of signs. In order to identify the essence of the disagreement between I.G. Gerder and G.E. Lessing in the field of establishing boundaries between the kinds of art, special attention is paid to the consideration of Gerder concept of comparative analysis of painting, music and poetry, which is based on the difference of their ways of influence on the recipient – "in space", "in time "and" by force". In the process of analyzing Gerder's reflections, not only his critical attitude to the theory of signs developed by Lessing was considered, but also an attempt by the opponent of "Laokoon" author to justify the use of key concepts of metaphysics to compare the impact of different kinds of art. When comparing the views of E. Basin and R. Ingarden on the semantic aspect of "Laocoon", the debatable nature of their judgments about the characterization of the characters used in poetry by Lessing is identified. In addition, the article analyzes Lessing's thinking about the possibility of connecting different types of art, the organic combination of which depends on the specifics of the signs used by one or the other art, as well as emphasizes the productivity of the German thinker's idea. This aspect is revealed not only through the analysis of "Laokoon" in the works of E. Basin and R. Ingarden, but also by turning to the theoretical developments of E. Cassirer, B. Balash, A. Vartanova. Thus, the study of the semantic issues of Laokoon has shown the prominence of its conceptual landmarks for theoretical search, both in the field of aesthetics and art.

Response of FPSO Systems to Squalls

2011 ◽  
Author(s):  
Arun Duggal ◽  
Caspar Heyl ◽  
Amir H. Izadparast ◽  
Joerik Minnebo
Keyword(s):  
Wind Speed ◽  
Global Analysis ◽  
Single Degree Of Freedom ◽  
Transient Phenomena ◽  
Analysis Techniques ◽  
Extreme Response ◽  
Speed Up ◽  
The Difference ◽  
The Impact

Squalls are mesoscale sudden wind-speed increases that can occur worldwide and are a design driver for FPSO systems in areas the other design environmental conditions are relatively benign, e.g. offshore West Africa. Squalls are transient winds which rapidly reach a peak wind speed (up to 50 m/s) and then decay to low speeds in a span of 60 to 90 minutes. As squalls are transient phenomena traditional steady-state analysis techniques cannot be used for the global analysis or the development of the extreme response estimates. This paper focuses on the characterization of the squall environment and the impact of various parameters on the response of FPSOs. The responses of both spread and turret moored FPSOs are presented and the difference in response is discussed. The paper then focuses on a parametric study on a representative single degree of freedom model of a spread-moored FPSO with an emphasis on the estimation of the extreme response and its dependence on sample size.

Characterization of Mo-Containing Systems Supported on AlPO4-5 and Aluminium Phosphate and Their Behavior in Thiophene Conversion

1992 ◽  
Vol 57 (4) ◽  
pp. 836-844 ◽  
Author(s):  
Alla A. Spojakina ◽  
Nina G. Kostova ◽  
Ljubomir Dimitrov
Keyword(s):  
Hydrogen Sulfide ◽  
Ir Spectroscopy ◽  
Chemical Interaction ◽  
Aluminium Phosphate ◽  
Thiophene Conversion ◽  
The Difference ◽  
The Impact

The properties of AlPO4-5 with zeolite-like structure and amorphous aluminium phosphate modified by nickel and/or molybdenum (1 wt.% and 10 wt.%, respectively) have been studied using ESR and IR spectroscopy and catalytic testing in hydrodesulfurization (HDS) of thiophene. The chemical interaction between all components of catalysts with formation of polymolybdate structures is revealed. The impact of the support is reflected in the difference of composition of polymolybdates, and different interactions with the hydrogen sulfide eliminated in thiophene conversion. The selectivity of the thiophene conversion and adsorption of H2S eliminated depend on the method of introduction of components only for AlPO4-5.

scholarly journals Modelling of Noise Pollution Due to Heterogeneous Highway Traffic in India

2019 ◽  
Vol 20 (1) ◽  
pp. 22-39 ◽  
Author(s):  
Aditya Kamineni ◽  
Sunil Kumar Duda ◽  
Venkaiah Chowdary ◽  
C.S.R.K. Prasad
Keyword(s):  
Traffic Noise ◽  
Noise Pollution ◽  
Heterogeneous Traffic ◽  
Noise Prediction ◽  
Highway Traffic ◽  
Noise Levels ◽  
Speed Variation ◽  
Proposed Model ◽  
Traffic Speed ◽  
The Difference

Abstract Compared to homogeneous traffic flow, traffic speed variation is drastic with the involvement of heterogeneity. With an intent of studying the negative upshot of fluctuating speeds of heterogeneous traffic on the environment, the current paper is the outcome of the research done on various highways located in the states of Andhra Pradesh and Telangana in India, with an objective of developing a comprehensive noise prediction model by taking into account the traffic and roadway factors. Quantified noise levels [Leq (dBA) and L10 (dBA)] revealed that for the traffic speed variation of 10 to 95 kmph, the traffic noise levels were significantly affected by the variations in the proportion of the vehicle. On a specific note, the proposed model can be effectively used for the highway traffic noise prediction especially for the heterogeneous traffic, as the difference between the measured and predicted noise levels are within 1 to 10 dB (A).

Evaluation of the impact of public investment programs on social and economic performance of territories

2019 ◽  
pp. 109-123
Author(s):  
I. E. Limonov ◽  
M. V. Nesena
Keyword(s):  
Bayesian Modeling ◽  
Positive Impact ◽  
Public Investment ◽  
Difference In Differences ◽  
The Public ◽  
Export Activity ◽  
Regional Investment ◽  
The Difference ◽  
The Impact ◽  
Development Institution

The purpose of this study is to evaluate the impact of public investment programs on the socio-economic development of territories. As a case, the federal target programs for the development of regions and investment programs of the financial development institution — Vnesheconombank, designed to solve the problems of regional development are considered. The impact of the public interventions were evaluated by the “difference in differences” method using Bayesian modeling. The results of the evaluation suggest the positive impact of federal target programs on the total factor productivity of regions and on innovation; and that regional investment programs of Vnesheconombank are improving the export activity. All of the investments considered are likely to have contributed to the reduction of unemployment, but their implementation has been accompanied by an increase in social inequality.

Analisis Karakterisasi Teknologi Direct Sequence Spread Spectrum Dan Frequency Hopping Spread Spectrum

2019 ◽  
Vol 2 (2) ◽  
pp. 129-138
Author(s):  
Fawzan Galib Abdul Karim Bawahab ◽  
Elvan Yuniarti ◽  
Edi Kurniawan
Keyword(s):  
Spread Spectrum ◽  
Communication Systems ◽  
Multiple Access ◽  
Frequency Hopping ◽  
Direct Sequence Spread Spectrum ◽  
Direct Sequence ◽  
Frequency Hopping Spread Spectrum ◽  
Two Systems ◽  
The Difference

Abstrak. Pada penelitian ini, telah dilakukan analisa karakterisasi pada teknologi Direct Sequence Spread Spectrum dan Frequency Hopping Spread Spectrum, sebagai salah satu teknik multiple-access pada sistem komunikasi. Karakterisasi dilakukan untuk mencari bagaimana cara meningkatkan keoptimalan kedua sistem tersebut, dalam mengatasi masalah interferensi dengan sistem dan channel yang sama. Dan juga untuk menentukan veriabel apa yang mempengaruhi keoptimalan kedua sistem tersebut. Karakterisasi dilakukan dengan menentukan variabel-variabel yang mempengaruhi keoptimalan keduanya. Hasil dari karakterisasi, diketahui variabel-variabel yang mempengaruhi kemampuan sistem DSSS yaitu nilai frekuensi spreading (). Sedangkan untuk sistem FHSS yaitu nilai frekuensi spreading ( dan ) dan selisih antara frekuensi hopping data dengan frekuensi hopping interferensi . Kata Kunci: BER, DSSS, FHSS, Interference, Spread spectrum. Abstract. In this study, characterization of Direct Sequence Spread Spectrum and Frequency Hopping Spread Spectrum technologies have been done, as one of the multiple-access techniques in communication systems. Characterization is done to find out how to improve the ability of the two systems, in solving interference problems with the same system and channel. And also to determine what veriabel affects the ability of the two systems. Characterization is done by determining the variables that affect the ability of both. The results of the characterization, known variables that affect the ability of the DSSS system are the spreading frequency value (). As for the FHSS system, the spreading frequency value ( and ) and the difference between frequency hopping data with frequency hopping interference .

INNOVATIVE ARCHITECTURAL IDEAS OF THE FUTURE DWELLINGS

2020 ◽  
Vol 2 (2) ◽  
pp. 67-75
Author(s):  
Dzhyhil Yu. ◽  
Keyword(s):  
Personal Responsibility ◽  
Traffic Noise ◽  
Modern World ◽  
Future Research ◽  
Housing Design ◽  
Residential Architecture ◽  
Planning Decisions ◽  
National University ◽  
Methodological Principles ◽  
The Impact

Residential architecture has one of the most conservative styles based on its specifics. However, today this type of architecture seeks to actively respond to changes in the modern world. These changes are caused by multiple factors, among them are: technological and information progress; lack of resources and environmental pollution; military conflicts and population migration etc. The purpose of this article is to summarize the experience of the Department of Architectural Environment of Lviv Polytechnic National University over housing issues and outline the methodological principles of innovation in designing both individual houses and the architectural environment of residential formations. While writing this article, we analyzed the 15-year experience of Architectural Environment's Department diploma projects. The unique feature of these projects is the priority on the design of the environment. The evolution of diploma project topics is revealed on multiple distinctive examples such as the reconstruction of old buildings in Lviv and the construction of prefabricated homes and container-type housing. Futuristic settlements are represented in projects such as “The Ocean Settlements” and “Prykarpatsk - the City of Future”. Research projects were developed to study current trends in housing design and the impact of innovative technologies on planning decisions. These projects discoursed the protection of housing from traffic noise and issues related to environmental preservation. Innovative architectural ideas of future housing, developed by students in these projects, are based on a combination of aesthetic, technical, and social components of architecture. The conclusion indicates that when educating future architects, it is important to teach them the basics of the craft, as well as the ability to defend their innovative ideas. The emphasis is placed on the importance of educating the architect's personal responsibility for their own design solutions. It is stated that professional motivation and the ability to constantly renew previously acquired knowledge and skills will be among the main tasks in training future architects.

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