scholarly journals Optimal operation of a rail lubrication device with respect to noise reduction and wheel/rail friction coefficient

2021 ◽  
Author(s):  
Gabriella Csortos ◽  
Fülöp Augusztinovicz ◽  
Péter Bocz
Keyword(s):  
Friction Coefficient ◽  
Noise Reduction ◽  
Research Work ◽  
Optimal Operation ◽  
Noise Mitigation ◽  
Additional Task ◽  
Noise Measurements ◽  
Lubricant Application ◽  
The Right ◽  
Rail Lubrication

During research work, three series of studies were performed to support the importance of using rail lubrication at tramway tracks in Budapest. The first task was to determine the noise reduction efficiency of automated rail lubrication: noise measurements were performed in case of lubricated rails with corrugations, non-lubricated rails with corrugations, grinded rails as well as grinded and lubricated rails. Once the conformity was determined, an additional task was to find the right lubricant. After the noise and braking effect tests of various lubricants, it was a legitimate need to determine the optimum lubricant application because the setting of the devices is based only on the experience of the Operator. Finally, the noise mitigation effect and the friction coefficient affecting the wheel/rail contact with different lubricant application settings were investigated simultaneously. It is important that the lubricant be applied in appropriate amount such that even the safe movement of the trams is guaranteed, but at the same time the noise reduction is satisfactory too. Based on the results, the authors make recommendations for the application of the rail lubrication devices.

Valid Signature Detection and Verification for Security of Individual Person

2016 ◽  
Vol 1 (1) ◽  
pp. 50-53 ◽  
Author(s):  
Varun Sharma ◽  
Narpat Singh
Keyword(s):  
Neural Network ◽  
Comparative Analysis ◽  
Recent Work ◽  
Research Work ◽  
Early Research ◽  
Individual Person ◽  
Signature Detection ◽  
Online Signature ◽  
The Right ◽  
Handwritten Signature

In the recent research work, the handwritten signature is a suitable field to detection of valid signature from different environment such online signature and offline signature. In early research work, a lot of unauthorized person put the signature and theft the data in illegal manner from organization or industries. So we have to need identify, the right person on the basis of various parameters that can be detected. In this paper, we have proposed two methods namely LDA and Neural Network for the offline signature from the scan signature image. For efficient research, we have focused the comparative analysis in terms of FRR, SSIM, MSE, and PSNR. These parameters are compared with the early work and the recent work. Our proposed work is more effective and provides the suitable result through our method which leads to existing work. Our method will help to find legal signature of authorized use for security and avoid illegal work.

scholarly journals Exhaust Noise Reduction by Application of Expanded Collecting System in Pneumatic Tools and Machines

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1592
Author(s):  
Dominik Gryboś ◽  
Jacek S. Leszczyński ◽  
Dorota Czopek ◽  
Jerzy Wiciak
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Noise Reduction ◽  
Sound Pressure ◽  
Acoustic Pressure ◽  
Pressure Level ◽  
Computational Results ◽  
Noise Measurements ◽  
Exhaust Noise ◽  
Collecting System

In this paper, we demonstrate how to reduce the noise level of expanded air from pneumatic tools. Instead of a muffler, we propose the expanded collecting system, where the air expands through the pneumatic tube and expansion collector. We have elaborated a mathematical model which illustrates the dynamics of the air flow, as well as the acoustic pressure at the end of the tube. The computational results were compared with experimental data to check the air dynamics and sound pressure. Moreover, the study presents the methodology of noise measurement generated in a pneumatic screwdriver in a quiet back room and on a window-fitting stand in a production hall. In addition, we have performed noise measurements for the pneumatic screwdriver and the pneumatic screwdriver on an industrial scale. These measurements prove the noise reduction of the pneumatic tools when the expanded collecting system is used. When the expanded collecting system was applied to the screwdriver, the measured Sound Pressure Level (SPL) decreased from 87 to 80 dB(A).

scholarly journals Comparison of the flank and ventral midline approach for ovariohysterecto-my in bitches

2020 ◽  
Vol 22 (98) ◽  
pp. 63-68
Author(s):  
A. D. Stepanov
Keyword(s):  
Abdominal Wall ◽  
Research Work ◽  
White Line ◽  
Lateral Abdominal Wall ◽  
Surgical Access ◽  
Anterior Edge ◽  
Vertical Incision ◽  
Surgical Sutures ◽  
The Right ◽  
Midline Approach

Surgical access for ovariohysterectomy in bitches through the right lateral abdominal wall with an incision in its upper third in the direction from the anterior edge of the macula to the fourth nipple of the corresponding side of the breast is proposed. The article presents the results of studies obtained when used for the purpose of ovariohysterectomy in bitches of operative access through the right lateral and ventral abdominal wall. Research work was conducted on healthy mature bitches. The operations were performed in the area of the right lateral abdominal wall and in the umbilical region. On the lateral abdominal wall, an oblique-vertical incision was used at the border of the inguinal and iliac areas in the direction from the anterior edge of the macula to the fourth nipple of the corresponding side of the breast. The ventral abdominal wall was cut along the white line. It was found that when performing ovariohysterectomy in bitches using the proposed surgical access through the right lateral abdominal wall with a smaller wound size (P < 0.05), the duration of the operation and the healing period correspond to those when using median laparotomy. It is proved that operative access with oblique-vertical incision in the area of the right lateral abdominal wall at the border of the groin and anus during ovariohysterectomy in bitches provides favorable opportunities for surgical reception and closure of the surgical wound. The number of surgical sutures for sutures on the abdominal wall is less than in the case of ventral access (P < 0.01). It is also noted that in ovariohysterectomy in bitches, operative access through the right lateral abdominal wall with an incision in the direction from the anterior edge of the macula to the fourth nipple of the corresponding side of the breast may be recommended as an alternative access through the white line of the abdomen.

scholarly journals Fundamental Investigation for Processing of Pb-Cu-S-Bearing Materials

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 74
Author(s):  
Christoph Zschiesche ◽  
Jürgen Antrekowitsch
Keyword(s):  
Oxygen Potential ◽  
Lead Concentration ◽  
Raw Materials ◽  
Research Work ◽  
Distribution Coefficients ◽  
Condensed Phases ◽  
Fundamental Investigation ◽  
Bearing Materials ◽  
The Right ◽  
The Impact

The processing of polymetallic materials provides some challenges to every flowsheet. Within Aurubis Cu-Pb-metallurgical flowsheet, a broad range of raw materials and intermediates are processed. Continuous improvements are required to adapt the flowsheet according to the changing material quantity and quality. Therefore, thermodynamic modeling is the desired and most efficient way to conduct scenario analysis. Hence, databases and software are becoming better and better as the acceptance of this method increased. Further understanding is promoted by conducting experimental test work to validate the calculated results. In this research work, the impact of various oxygen potential on the formation of the condensed phases’ slag, matte, speiss and crude lead were investigated. A frequent check of slag metallurgy, in particular, the iron and lead concentration, provide feedback if the metallurgical process is operating at the right oxygen potential. Following, the calculated distribution coefficients for Cu, Pb, As, Sb, Sn and Ni between matte/speiss and speiss/lead are discussed.

scholarly journals Порівняння бокового та медіанного доступу за оваріогістеректомії у кішок

2017 ◽  
Vol 19 (77) ◽  
pp. 179-184
Author(s):  
A.D. Stepanov
Keyword(s):  
Mammary Gland ◽  
Abdominal Wall ◽  
Research Work ◽  
Surgical Access ◽  
Median Laparotomy ◽  
The Cross ◽  
The Right ◽  
Upper Third ◽  
Sexually Mature ◽  
Ventral Wall

In the article results of examinations got in case of surgical accesses through the flank and ventral wall of the stomach’s implementation on purpose to the cats’ ovariohysterectomy are given. The research work was carried out on healthy sexually-mature cats. Surgeries were done in the upper third of the right flank abdominal wall and in the behind the umbilical zone. The cross-cut on the boundary of groin and illium area in the direction from the hook-bone’s front border to the fourth nipple of the mammary gland of the appropriate side was applied on the side abdominal wall. It is established that in case of the accomplishment of cat’s ovariohysterectomy with the use of suggested surgical access through the side abdominal wall a duration of an operation and a period of healing are in line with those which are in case of application of median laparotomy. It is proved that the surgical access with the cross-cut done in the upper third of the right flank abdominal wall and on the boundary of groin and illium area in case of cat’s ovariohysterectomy secure better opportunities for the fulfillment of the surgical method than the median one. It is also noted that in case of cat’s ovariohysterectomy the surgical access through the upper third of the right flank abdominal wall with the cut in the direction from the hook-bone’s front border to the fourth nipple of the mammary gland of the appropriate side could be recommended as an alternative of an access through the middle line of the stomach.

scholarly journals Detection of Multi-Class Retinal Diseases Using Artificial Intelligence: An Expeditious Learning Using Deep CNN with Minimal Data

2019 ◽  
Vol 12 (3) ◽  
pp. 1577-1586 ◽  
Author(s):  
Karthikeyan S. ◽  
Sanjay Kumar P. ◽  
R J Madhusudan Madhusudan ◽  
S K Sundaramoorthy Sundaramoorthy ◽  
P K Krishnan Namboori3
Keyword(s):  
Real Time ◽  
Retinal Vein Occlusion ◽  
Central Retinal Vein Occlusion ◽  
Research Work ◽  
Diagnostic Strategy ◽  
Fundus Images ◽  
Vein Occlusion ◽  
Deep Cnn ◽  
The Right ◽  
Central Retinal Vein

The health-related complications such as diabetes, macular degeneration, inflammatory conditions, ageing and fungal infections may cause damages to the retina and the macula of the eye, leading to permanent vision loss. The major diseases associated with retina are Arteriosclerotic retinopathy (AR), Central retinal vein occlusion (CRVO), Branch retinal artery occlusion (BRAO), Coat's disease (CD) and Hemi-Central Retinal Vein Occlusion (HRVO). The symptomatic variations among these disorders are relatively confusing so that a systematic diagnostic strategy is difficult to set in. Therefore, an early detection device is required that is capable of differentiating the various ophthalmic complications and thereby helping in providing the right treatment to the patient at the right time. In this research work, 'Deep Convolution Neural Networks (Deep CNN) based machine learning approach has been used for the detection of the twelve major retinal complications from the minimal set of fundus images. The model was further cross-validated with real-time fundus images. The model is found to be superior in its efficiency, specificity and ability to minimize the misclassification. The “multi-class retinal disease” model on further cross-validation with real-time fundus image of the gave an accuracy of 95.63 %, validation accuracy of 92.99 % and F1 score of 91.96 %. The multi-class model is found to be a theranostic clinical support system for the ophthalmologist for diagnosing different kinds of retinal problems, especially BRAO, BRVO, CRAO, CD, DR, HRVO, HP, HR, and CN.

Usage Data for Predicting User Trends and Behavioral Analysis in E-Commerce Applications

2021 ◽  
Vol 13 (4) ◽  
pp. 40-61
Author(s):  
Sathiyamoorthi V. ◽  
T. Nadana Ravishankar ◽  
Ilavarasi A. K. ◽  
Sridhar Udayakumar ◽  
Karthikeyan Harimoorthy ◽  
...  
Keyword(s):  
Online Shopping ◽  
Research Work ◽  
Behavioral Analysis ◽  
Market Conditions ◽  
User Interactions ◽  
Vast Amount ◽  
User Access ◽  
Internet Environment ◽  
The Right ◽  
Day By Day

Reviewing and buying the right goods from online websites is growing day by day in today's fast internet environment. Numerous goods in the same label are available to consumers. It is thus a difficult job for consumers to pick up the correct commodity at a decent price under different market conditions. Therefore, it is important for owners of online shopping websites to better understand their customers' needs and offer better services. For these reasons, the access log documented a vast amount of data related to user interactions with the websites. This access log therefore plays a key role in predicting user access trends and in recommending the best product to consumers. This research work therefore focuses on one such methodology for evaluating the pattern and behavioral analysis of users in e-commerce websites.

Potential of Human Tracking in Assistive Technologies for Children with Cognitive Disabilities

2017 ◽  
pp. 245-266 ◽  
Author(s):  
Mark Tee Kit Tsun ◽  
Lau Bee Theng ◽  
Hudyjaya Siswoyo ◽  
Sian Lun Lau
Keyword(s):  
Cognitive Disabilities ◽  
Research Work ◽  
Well Being ◽  
Assistive Technologies ◽  
Human Tracking ◽  
Full Time ◽  
Tracking Systems ◽  
Measurement Units ◽  
The Right ◽  
Outdoor Localization

The development of human tracking systems has had a significant influence over the evolution of Assistive Technologies for aiding children with cognitive disabilities. Techniques that range from radio frequency, Inertial Measurement Units, and Electroencephalography to the Global Positioning System and depth-based vision systems have provided tools for researchers to incorporate indoor and outdoor localization, motion and activity tracking as well as well-being monitoring into their projects. This chapter aims to introduce the latest human tracking options to consider for implementation of future Assistive Technology projects. Some example research work is discussed with emphasis on how human tracking systems can help in gathering the right data. The chapter concludes with a discussion of a proposed hybrid vision-based system for assisting in full-time supervision of children with cognitive disabilities, utilizing the chapter's central theme of sensor fusion application.

Evaluation of Lower Limb Muscles Fatigue and Force during Running 400-Meters Using Learning Machine

2019 ◽  
Vol 43 ◽  
pp. 39-53
Author(s):  
Hayder A. Yousif ◽  
Abdul Rahim Norasmadi ◽  
Ahmad Faizal Bin Salleh ◽  
Ammar Zakaria
Keyword(s):  
Research Work ◽  
Gluteus Maximus ◽  
Median Frequency ◽  
Bipolar Electrodes ◽  
Lower Limb Muscles ◽  
Full Speed ◽  
Linear Slope ◽  
Learning Machine ◽  
The Right ◽  
Semg Signals

The main goal of this research work is to study and evaluate the muscles force and fatigue of Gastrocnemius Medialis (GMS), Gluteus Maximus (GM), and Gastrocnemius Lateralis (GL) during running for 400-meters based on surface Electromyography (sEMG) signals. The sEMG signals of the selected muscles from the right leg have been collected by using bipolar electrodes from 15 subjects during the run on the tartan athletic track with two pacing strategies. The first strategy: 1st 200-meters running 87% - 94% of full speed and last 200-meters sprinting (full speed). The second strategy: 1st 300-meters running 87% - 94% of sprinting and last 100-meters sprinting. The rate of fatigue has been calculated by using Root Mean Square (RMS) and Median Frequency (MDF) features. Then, the slopes of linear regression were calculated from both RMS and MDF at each 100-meters. The linear slope values represented the rate of fatigue and force. From the results of 1st and 2nd running strategies, the force of GM and GL muscles increased during the 4th 100-meters of the 1st strategy and decreased with GM and GMS muscles during the 4th 100-meters of the 2nd strategy. The less index fatigues were during the 1st strategy for most selected muscles. Finally, it can be concluded the running with the 1st strategy get less fatigues and the force of most selected muscles increased compared with the 2nd strategy based on the results of time and frequency domain features (RMS and MDF).

scholarly journals Aeroacoustics of Silent Owl Flight

2020 ◽  
Vol 52 (1) ◽  
pp. 395-420 ◽  
Author(s):  
Justin W. Jaworski ◽  
N. Peake
Keyword(s):  
Mathematical Modeling ◽  
Noise Reduction ◽  
Current Knowledge ◽  
Foraging Strategies ◽  
Aerodynamic Noise ◽  
Noise Generation ◽  
Reduction Strategies ◽  
Noise Measurements ◽  
Modeling And Experiments ◽  
Review Current

The ability of some species of owl to fly in effective silence is unique among birds and provides a distinct hunting advantage, but it remains a mystery as to exactly what aspects of the owl and its flight are responsible for this dramatic noise reduction. Crucially, this mystery extends to how the flow physics may be leveraged to generate noise-reduction strategies for wider technological application. We review current knowledge of aerodynamic noise from owls, ranging from live owl noise measurements to mathematical modeling and experiments focused on how owls may disrupt the standard routes of noise generation. Specialized adaptations and foraging strategies are not uniform across all owl species: Some species may not have need for silent flight, or their evolutionary adaptations may not be effective for useful noise reduction for certain species. This hypothesis is examined using mathematical models and borne out where possible by noise measurements and morphological observations of owl feathers and wings.

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