A Study on the Effects of Noise Level, Cleaning Method, and Vectorization Software on the Quality of Vector Data

2008 ◽  
pp. 299-309 ◽  
Author(s):  
Hasan S. M. Al-Khaffaf ◽  
Abdullah Zawawi Talib ◽  
Rosalina Abdul Salam
Keyword(s):  
Noise Level ◽  
Vector Data ◽  
Cleaning Method

Effects of Railway Noise on Residents’ in A Residential Area

2021 ◽  
Vol 3 (01) ◽  
pp. 17-28
Author(s):  
Ria Anggreani Syahputri ◽  
Budi Damianto
Keyword(s):  
Noise Level ◽  
Sleep Disturbances ◽  
Sampling Technique ◽  
Residential Area ◽  
Comfort Level ◽  
Simple Method ◽  
Urban Village ◽  
Noise Measurements ◽  
Influence Of Noise

Population growth in Depok City is large and not in accordance with development land causes many residents’ to build houses with conditions <5 meters from the line of Electric Rail Train or Kereta Rel Listrik (KRL); this causes changes in the quality of the environment, including noise. The objective of this study is to determine the noise level, and the results will be compared with the standard noise level of the residential area; also, to find the influence of noise on residents’. This research was conducted in the area of ​​Rawa Geni Raya Street, 1st Neighborhood, Ratu Jaya Urban Village, Depok City. Noise measurements were carried out at 5-points using a simple method with a noise level measuring instrument (SLM). At one time, the measurement was taken for 10 minutes with a reading time of every 5 seconds. The questionnaire was measured using a Purposive Random Sampling technique, and the number of samples was calculated using the Slovin formula. The results of this study indicate that the 5-point noise level exceeds the recommended threshold according to KEPMEN LH 48 of 1996 and PERMENKES 718/1987 at  55 dB(A). The largest value for the 24-hour noise level (LSM) is at point 1, which is 5 m from the KRL line. The noise level on the weekday is 75.32 dB(A) and 74.24 dB(A) on weekends. According to PERMENKES No 718/1987, the location of point 1 should be included in Area D as an industrial zone, plant, railway station, and bus terminal. The results of questionnaires by 34 respondents showed that the noise generated by KRL was noisy and the majority of respondents agreed the noise affected the comfort level; in terms of health, respondents agreed KRL noise caused sleep disturbances and hearing loss.

scholarly journals A Comparative Study between Pre-construction and Construction Phases of Champhai-Zokhawthar Road Construction, Mizoram: Air Quality and Noise Quality Assessments

2019 ◽  
Vol 7 (1) ◽  
pp. 47-53
Author(s):  
Lalven tluanga ◽  
◽  
H. Lalramnghinglova
Keyword(s):  
Economic Growth ◽  
Particulate Matter ◽  
Air Quality ◽  
Comparative Study ◽  
Noise Level ◽  
Road Construction ◽  
Suspended Particulate ◽  
The Mean ◽  
Negative Impacts

In recent years, Mizoram has made immense progress in various sectors and initiated developmental programmes for its economic growth. An important contributing factor to this development and growth is the transport connectivity projects. Although connectivity projects can boost economic growth, its negative effects cannot be neglected. In view of this, the present research studies the impacts of Champhai – Zokhawthar road construction on the air quality and noise quality of the region. This comparative study of the impact on the quality of air and noise pollution in the pre-construction phase and construction phase provide a clear-cut example of the negative impacts caused by road construction and provide a fresh outlook for formulation of improved management plans. Air quality assessment was carried out using High Volume Air Sampler and the following parameters were monitored – suspended particulate matter (SPM), respirable suspended particulate matter (RSPM), nitrogen dioxide (NO2) and sulphur dioxide (SO2). The results indicate that mean SPM concentration was increased by 22.82 µg/m3; RSPM concentration by 14.67 µg/m3; NO2 concentration by 4.08 µg/m3; and SO2 concentration was increased by 0.06 µg/m3 from the pre-construction phase to construction phase. Noise quality assessment was carried out at three sites – Zotlang, Melbuk and Zokhawthar by using Lutron SL-4001 Sound Level Meter and Leq, Lmax and Lmin were recorded and calculated. The mean noise level at Zotlang wasincreased by 8.72 dB (A) and at Melbuk the mean noise level was increased by 9.35 dB (A). However, at Zokhawthar, there was a decrease in mean noise level by 0.13 dB (A). From the present study, it is evident that road construction poses a threat to the air quality and noise quality of the study area and improved measuresneed to betaken to curb its negative impacts

scholarly journals Dynamic Structure of the Horsehead Nebula

1987 ◽  
Vol 115 ◽  
pp. 90-91 ◽  
Author(s):  
H. Suzuki ◽  
N. Kaifu ◽  
M. Ohishi ◽  
T. Miyaji ◽  
S. Ishikawa
Keyword(s):  
Noise Level ◽  
Dynamic Structure ◽  
Grid Spacing ◽  
The West ◽  
Pointing Errors ◽  
Integrated Intensity ◽  
Sharp Edges ◽  
Bad Weather ◽  
Velocity Interval

We have made a preliminary map of the Horsehead nebula in CO (J=1-0) using the NRO 45-m telescope. The HPBW is 15″, the grid spacing 10″, and the velocity resolution is ∼0.1km/s. Figure 1 shows the integrated intensity with a velocity interval 10-11.5 km/s, which we found represents well the shape of the dark globule of the Horsehead. The coincidence of the CO feature and the dark nebulocity is strikingly well, especially at the sharp edges in the south and in the west (from the neck to the ears). The quality of the data are not satisfactory, though. The typical noise level is 1 K rms in TA, and the accuracies of the pointing and the intensity calibration is rather low due to the bad weather during the observation. Some scanning effects in the intensities can be recognized in Figure 1. One of the reason why the gap obtically seen beneath the jaw is not clear in the CO map may be attributed to the pointing errors.

scholarly journals Spectral Probability Density for Broadband Seismic Ambient Noise Level

2021 ◽  
Vol 1 (1) ◽  
pp. 17-21
Author(s):  
Endah Puspita Sari ◽  
Melda Panjaitan ◽  
Hery Sunandar ◽  
Erida Wati
Keyword(s):  
Time Series ◽  
Probability Density ◽  
Noise Level ◽  
Ambient Noise ◽  
Quality Of Information ◽  
Seismic Ambient Noise ◽  
Ambient Noise Level ◽  
Test Execution ◽  
Time Series Approach

The time-series approach is commonly utilized to get to the estimation of the likelihood thickness work of control ghostly densities (PDF PSD) of waveform information. This paper is concerned with the introduction of the evaluation of waveform commotion to degree the likelihood thickness work (PDF) be done inside, we utilized the metadata from a stock, a parser occurrence of DNP (Denpasar, Bali, Indonesia), IGBI (Ingas, Bali, Indonesia), and PLAI (Plampang, NTB, Indonesia) from BMKG IA-Networks and computations are based on the schedule utilized by McNamara Demonstrate. The point of this paper to characterize the current and past execution of the stations and recognizing the data on clamor levels at BMKG IA-Networks Station. The result of this paper shows the consistency of the unearthly is displayed the DNP, IGBI, and PLAI organize to confirm the quality of information conjointly acts as a test execution broadband arrange to the time taken by the broadband organize within the field and examination the Lombok earthquake in 2018.

Study of a New Transmission System for Electric Scooters

2006 ◽  
Author(s):  
Shinn-Liang Chang ◽  
Long-Chung Hsieh ◽  
Jen-Yu Liu ◽  
Yu-Ren Chen ◽  
Jia-Ling Tsai
Keyword(s):  
Noise Level ◽  
Transmission System ◽  
Gear Train ◽  
Commercial Product ◽  
The Finite Element Method ◽  
Electric Scooter ◽  
Set Up ◽  
Main Components ◽  
Gear Differential

Electric scooters are the most popular form of transport for old and disabled people in Taiwan and its popularity is fast increasing as people are living longer and longer. The main components of an electric scooter includes battery, motor, motor driver, and a transmission system, whose characteristics determine the overall energy efficiency. The commonly used transmission system of an electric scooter consists of a compound gear train (or a simple gear train) and a bevel gear differential, the quality of the former of which significantly influences the efficiency and noise level. In this paper, a new transmission system for use in an electric scooter is proposed. The finite element method was applied to evaluate the stress level experienced by the gears in the compound gear train. A test rig was also set up to compare the performance of the proposed transmission system with an existing commercial product. The new design was shown to produce better performance characteristics in terms of efficiency and noise level than the commercial product and has since been successfully manufactured and is currently being sold worldwide.

Exploring Building Data from Multispectral and Single-Photon Lidar Systems

2020 ◽  
Author(s):  
Lingli Zhu ◽  
Juha Hyyppä ◽  
Juho-pekka Virtanen ◽  
Xiaowei Yu ◽  
Harri Kaartinen
Keyword(s):  
Noise Level ◽  
Single Photon ◽  
Lidar Data ◽  
Vector Data ◽  
Advantages And Disadvantages ◽  
The Individual ◽  
Intensity Density ◽  
Density Resolution ◽  
Resolution Data ◽  
Better Than

This paper investigated building data from multispectral and single-photon Lidar systems. The multispectral datasets from the individual channels and fused channels were explored. The multispectral and single-photon Lidar data were compared across multiple aspects: the data acquisition geometry, number of echoes, intensity, density, resolution, data defects, noise level, and the absolute and relative accuracy. In addition, we explored the performance of the multispectral and single-photon data for roof plane detection for eight complex/stylish buildings to investigate the suitability of these data for 3D building reconstruction. The building data from the single-photon and multispectral Lidar systems were evaluated with respect to the reference building vector data with an accuracy of better than 5 cm. The advantages and disadvantages of both technologies and their applications in the urban building environment are discussed.

scholarly journals From Annotator Agreement to Noise Models

2009 ◽  
Vol 35 (4) ◽  
pp. 495-503 ◽  
Author(s):  
Beata Beigman Klebanov ◽  
Eyal Beigman
Keyword(s):  
Gold Standard ◽  
Noise Level ◽  
Reliable Data ◽  
Mathematical Framework ◽  
High Confidence ◽  
Data Set ◽  
Noise Models

This article discusses the transition from annotated data to a gold standard, that is, a subset that is sufficiently noise-free with high confidence. Unless appropriately reinterpreted, agreement coefficients do not indicate the quality of the data set as a benchmarking resource: High overall agreement is neither sufficient nor necessary to distill some amount of highly reliable data from the annotated material. A mathematical framework is developed that allows estimation of the noise level of the agreed subset of annotated data, which helps promote cautious benchmarking.

scholarly journals Do Ambient Conditions (Air Quality, Noise Level and Temperature) and Image Congruity Matter for Boosting Customer Approach Behaviors in the FSC Sector?

2020 ◽  
Vol 12 (24) ◽  
pp. 10636
Author(s):  
Heesup Han ◽  
Linda Heejung Lho ◽  
Antonio Ariza-Montes ◽  
Kyung-Sik Lee ◽  
Hyungshin Baek ◽  
...  
Keyword(s):  
Noise Level ◽  
Measurement Model ◽  
Ambient Condition ◽  
Decision Making Process ◽  
Ambient Conditions ◽  
Ticket Price ◽  
Approach Behaviors ◽  
Research Findings

The present research presented a conceptual framework by uncovering the apparent role of ambient condition quality (in-flight air, noise level, and temperature), image congruity, love, respect, and perceived ticket price in increasing customer approach behaviors in the full service carrier (FSC) industry. A quantitative method was used. The evaluation of the measurement model verified the quality of construct measures. Findings from statistical analyses demonstrated the significant associations among research variables, and identified the mediating nature of FSC love and FSC respect. In addition, the important moderating effect of perceived FSC ticket price was found. A prominent role of ambient condition quality in eliciting approach behaviors was also explored. Overall, our theoretical framework contained a prediction power for approach behaviors. The research findings thus assist FSC researchers and practitioners to better understand the process of generating the customer decision-making process and behaviors that are positive for full service carriers. This research hence successfully fulfilled its objective to discover the influences of the customer approach behaviors in the full service carrier (FSC) industry.

Dealing with Inliers in Feature Vector Data

2018 ◽  
Vol 26 (Suppl. 2) ◽  
pp. 25-45
Author(s):  
Dheeraj Kumar ◽  
Zahra Ghafoori ◽  
James C. Bezdek ◽  
Christopher Leckie ◽  
Kotagiri Ramamohanarao ◽  
...  
Keyword(s):  
Feature Vector ◽  
Relative Effectiveness ◽  
Real Life ◽  
Numerical Data ◽  
Visual Assessment ◽  
Nearest Neighbour ◽  
Vector Data ◽  
Single Linkage ◽  
The Third

Inliers (bridge points) between clusters degrade the ability of many algorithms to find clusters in numerical data. We present three new approaches to the detection and removal of inliers. Two approaches are based on Local Outlier Factor (LOF) scores. We also discuss using LOF scores for an isolation Nearest Neighbour Ensemble (iNNE) approach to inlier detection. The third approach uses MaxiMin (MM) sampling to remove both inliers and outliers. We compare the three approaches on a synthetic and two real-life datasets. The failure of single linkage clustering due to the existence of bridging points is used as a means for evaluating the relative effectiveness of the three methods. We also show how inliers can degrade the quality of images built by the improved Visual Assessment of Tendency (iVAT) algorithm, which provides a visual representation of potential single linkage clusters in the data.

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