Inspections of Tread Damaged Wheelsets

2008 ◽  
Author(s):  
Scott M. Cummings ◽  
Don Lauro
Keyword(s):  
Impact Load ◽  
Damage Mechanism ◽  
Location Data ◽  
Root Cause ◽  
Frequent Use ◽  
Crack Band ◽  
Defect Prevention ◽  
Research Consortium ◽  
High Level ◽  
Contact Position

Inspections of 163 wheelsets conducted by the Wheel Defect Prevention Research Consortium (WDPRC) have produced critical information in identifying the high-level root causes of tread damage. While the overall wheel tread damage problem appears to be split fairly evenly between shelling and spalling, the type of tread damage on a wheelset is strongly linked to the type of car from which it was removed. Coal car wheels, which generally run in heavy axle load, high-mileage service with minimal yard handling, are almost exclusively subject to shelling damage with little spalling damage. On the other hand, mixed freight cars, such as tank cars and covered hopper cars, tend to run in lower mileage service with more yard handling, resulting in fewer loading cycles under lighter stress and more frequent use of hand brakes. Not surprisingly then, wheels from these types of cars were observed to have a mix of spalling and shelling damage, with spalling being the predominant damage mechanism. Nearly every high impact wheel (HIW) inspected showed either spalling, shelling, or some combination of the two. As expected, wheel impact load detector (WILD) readings and radial tread run out data were found to be related. Rim thickness deviations and rim lateral face deviations were not found to be important contributors to shelling. The lateral tread location of radial run-out deviations and crack bands could be an important clue in discovering the root cause of shelling. Radial run-out data and crack band location data shows that shelling damage is most prevalent outboard of the tapeline. This is the expected wheel/rail contact position of a wheel in the lead wheelset position of a truck, while riding on the low (inside) rail of a curve. Many of the wheels that were removed for wear causes were found to have noncondemnable shelling and spalling, indicating that tread damage is more prevalent than repair records would indicate.

Association of the Individualizing and Binding Moral Foundations with Conceptions of Motherland in Russia

2021 ◽  
pp. 107-127
Author(s):  
O.A. Sychev ◽  
◽  
K.I. Belousov ◽  
Keyword(s):  
Content Analysis ◽  
Online Survey ◽  
Necessary Condition ◽  
Moral Foundations ◽  
Moral Norms ◽  
Positive Image ◽  
Russian Version ◽  
Moral Content ◽  
Frequent Use ◽  
High Level

Patriotism and attitude to the motherland attract much interest of researchers in the field of social sciences, although psychological foundations of these phenomena have not been sufficiently studied. On the basis of Moral Foundations Theory (by J. Haidt) we hypothesized that the characteristics of the moral sphere may be associated with some ideas about the motherland. In particular, binding moral foundations (including loyalty, authority and purity) which are more typical for conservatives should support positive patriotic ideas about the homeland. The low level of binding moral foundations can be related with a critical attitude towards the motherland, the presence of negative assessments of their country. This assump-tion is supported by the results of past studies of patriotism among individuals with different ideological views. The individualizing moral foundations dominating among liberals can be associated with a less global and narrower view of the motherland, which is linked with con-cepts of “family” and “home” rather than “society” or “country”. The aim of this study was to analyze the association between the individualizing and binding moral foundations with the content of ideas about the motherland. The important task of the study was to develop the Russian version of the moral foundations dictionary, which is necessary for analyzing the moral content of ideas about the motherland. To test the hypotheses we conducted a paper-pencil and online survey, obtained data included the answers on Moral Foundations Question-naire and textual answers characterizing the image of the motherland. The sample comprised 831 people (72% women) from 11 regions of Russia. Text responses were processed via com-puter content analysis in the LIWC program (by J. Pennebaker) using the moral foundations dictionary (all categories) and the general dictionary (10 categories most relevant to the prob-lem). To analyze the relations between the results of content analysis and MFQ questionnaire we calculated correlations of the individualizing and binding moral foundations with the presence or absence of each category in the participants’ responses. The results of the correlation analysis indicate that the individualizing moral foundations supports relatively narrow ideas about the motherland, associated with family and home, while people with a high level of binding moral foundations associate the motherland mostly with society and religion. Binding moral founda-tions support a positive image of the motherland, which is manifested in the more frequent use of positive assessments and avoidance of negative evaluations. Persons with a high level of binding moral foundations tend to ignore negative phenomena in the country, reflecting a violation of the individualizing moral norms (care and fairness). In particular, they less often mention violations of human rights and the poverty of the country's inhabitants. The necessary condition analysis revealed the effect of binding moral foundations as a necessary but insuffi-cient condition for maintaining a positive image of the motherland and the absence of negative ideas about it.

The Effects of Wheelset Position and Operating Environment on Rolling Contact Fatigue

2008 ◽  
Author(s):  
Scott M. Cummings ◽  
Paul Krupowicz
Keyword(s):  
Environmental Factors ◽  
Impact Load ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Contact Forces ◽  
Rolling Contact ◽  
Minor Role ◽  
Operating Environment ◽  
Lead Position ◽  
Defect Prevention

The Wheel Defect Prevention Research Consortium (WDPRC) conducted analyses of wheel impact load detector (WILD) data to explore how wheelset position and operating environment affect rolling contact fatigue (RCF). The typical three-piece freight car truck used in North America produces higher tangential wheel/rail contact forces on the wheelset in the lead position than on the wheelset in the trail position of a truck as a car negotiates a curve. An analysis of WILD data shows that these higher forces are contributing to more shelling damage on wheelsets that are consistently in the lead position of a truck. Datasets in which the cars are frequently oriented with the A-end leading show the largest percentage of elevated WILD readings in the lead position of the lead truck (axle 4) followed by the lead position of the trail truck (axle 2). Likewise, datasets in which the cars are frequently oriented with the B-end leading show the largest percentage of elevated WILD readings in the lead position of the lead truck (axle 1) followed by the lead position of the trail truck (axle 3). Additionally, datasets in which there is an equal mix of car orientations show a much more evenly distributed location of elevated WILD readings. Another analysis of WILD data from five trainsets of nearly identical cars shows that any differences in wheel tread damage due to component differences are insignificant in comparison to the differences in wheel tread damage associated with environmental factors. While this analysis does not address component specification differences that could potentially have a large influence on shelling (such as M-976 trucks in comparison to standard trucks), it does show that environmental factors can play a large role in wheel tread damage. Car routing and loading characteristics were investigated as possible wheel damage factors. It appears that cars running on routes through terrain with longer, steeper grades may be prone to increased wheel shelling, probably due to thermal mechanical shelling (TMS). Side-to-side imbalanced loading appears to play a minor role in wheel shelling for two of the five trainsets.

Temperature and Humidity Effects on MEMS Vibratory Gyroscope

2011 ◽  
Vol 2011 (DPC) ◽  
pp. 001361-001390 ◽  
Author(s):  
Chandradip Patel ◽  
F. Patrick McCluskey ◽  
David Lemus
Keyword(s):  
Damage Mechanism ◽  
Consumer Electronics ◽  
Vibratory Gyroscopes ◽  
Root Cause ◽  
Vibratory Gyroscope ◽  
In Situ Data ◽  
Aging Test ◽  
Temperature And Humidity ◽  
Mems Gyroscopes ◽  
Gyroscope Sensor

MEMS vibratory gyroscopes are increasingly used in applications ranging from consumer electronics to aerospace and are now one of the most common MEMS products after accelerometers. Despite their widespread use, the performance of MEMS gyroscopes in harsh environments is still under question. While some studies have been conducted to understand the temperature dependent performance of MEMS gyroscopes, the effects of sustained exposure to temperature combined with other harsh environment stresses have not been well researched. Thus, it is necessary to quantify MEMS vibratory gyroscope performance under such conditions. This paper will focus on the combined effects of temperature and humidity only. Performance of the MEMS vibratory gyroscope will be evaluated over time at high temperature and high humidity conditions by conducting an aging test on a COTS (commercial of the shelf) single axis MEMS vibratory gyroscope having an operating temperature range from −40°C to 80°C. The gyroscope sensor will be exposed to 60 °C and 90% RH (Relative humidity) for 500 hours. In-situ data will be monitored to track any shifts in device output. Any permanent changes in the output signal will be traced back to their fundamental root cause damage mechanism.

Extracting High-Level Information from Location Data: The W4 Diary Example

2008 ◽  
Vol 14 (1) ◽  
pp. 107-119 ◽  
Author(s):  
Gabriella Castelli ◽  
Marco Mamei ◽  
Alberto Rosi ◽  
Franco Zambonelli
Keyword(s):  
Location Data ◽  
Level Information ◽  
High Level

scholarly journals Evaluation of a Brief Format of the Triple P-Positive Parenting Program: A Pilot Study With Indonesian Parents Residing in Australia

2014 ◽  
Vol 31 (2) ◽  
pp. 144-158 ◽  
Author(s):  
Agnes Sumargi ◽  
Kate Sofronoff ◽  
Alina Morawska
Keyword(s):  
Parenting Practices ◽  
Positive Parenting ◽  
Parenting Program ◽  
Triple P ◽  
Cultural Appropriateness ◽  
Frequent Use ◽  
Program Content ◽  
Randomised Controlled ◽  
High Level

Dissemination of evidence-based parenting programs in developing countries is warranted, but prior to dissemination, the cultural appropriateness of programs needs to be assessed. This study provides an evaluation of the level of acceptability among Indonesian parents and the efficacy of a brief parenting program, the Triple P-Positive Parenting seminar. Thirty Indonesian parents of children aged 2–12 years old residing in Australia participated in the study. A 90-minute Triple P seminar with minimal changes in the format was delivered to parents in Indonesian. Parents reported a high level of acceptability and satisfaction with the program content. The efficacy of the program was also explored. Parents reported less frequent use of dysfunctional parenting practices, particularly permissive parenting style, and reduction in the intensity of child emotional and behavioural problems 3 weeks after the seminar. The effect was maintained at 3-month follow up. The results suggest that the Triple P seminar is acceptable and useful for Indonesian parents. Substantial changes in the content of the parenting program may not be necessary. Translated materials, culturally relevant examples and opportunity for questions appeared sufficient for parents. Future studies are required, including randomised controlled trials and larger sample sizes.

Investigation of Steam Desuperheater Waterhammer

2004 ◽  
Author(s):  
Gregory Zysk
Keyword(s):  
Analytical Methods ◽  
Distribution Network ◽  
Water Injection ◽  
Root Cause ◽  
Water Interaction ◽  
Design Changes ◽  
High Level ◽  
Steam System ◽  
Excessive Water

Steam supplied to an underground piping distribution network from a fossil fired boiler is desuperheated using water injection valves. Waterhammers occurred in the system, failing a valve on two separate occasions. Operations personnel also experience excessive high-level alarms at drain stations local to the valves. An investigation was conducted to determine the root cause of the valve failures and the cause of the excessive water in the steam system. Mitigating design changes were also proposed to solve these problems. Available analytical methods were shown to be effective in predicting waterhammer occurrence and magnitude. These methods can be used to evaluate the potential for waterhammer in similar systems with potential steam/water interaction.

scholarly journals Road Traffic Noise Pollution a Hazard

1970 ◽  
Vol 42 (4) ◽  
pp. 435-440
Author(s):  
Tayyaba Aftab ◽  
Farzana Bashir ◽  
Tahira Shafiq
Keyword(s):  
Noise Level ◽  
Road Traffic ◽  
Traffic Noise ◽  
Working Hours ◽  
Noise Pollution ◽  
Road Traffic Noise ◽  
Engineering Controls ◽  
Frequent Use ◽  
High Level ◽  
Average Noise Level

A road traffic noise study was conducted in Lahore at 18 busy places of high traffic flow in peak working hours of the day. It has been found that the day time average noise level has crossed the permissible limit of 85dB(A) at 90% busy points in the city. The maximum average noise level recorded in Lahore was 104 dB(A). This high level attributed to vehicular traffic specially auto rickshaw with ineffective silencers (without filters) and frequent use of the pressure horns by buses, wagons and trucks etc. The findings of the survey provide enough baseline data for engineering controls and interim legislation against traffic noise pollution. Key words: Noise pollution, Traffics load , Community health, Lahore city Bangladesh J. Sci. Ind. Res. 42(4), 435-440, 2007

scholarly journals Problems and Prospects for the Development of the Municipal Infrastructure Management System in the Russian Federation

2021 ◽  
pp. 80-93
Author(s):  
S. L. Katanandov ◽  
A. Yu. Demin
Keyword(s):  
Local Governments ◽  
National Development ◽  
Infrastructure Management ◽  
Root Cause ◽  
Russian Federa Tion ◽  
Wear And Tear ◽  
The Russian Federation ◽  
High Level ◽  
Infrastructure Services

In modern conditions, the solution of the national development tasks of the Russian Federa-tion, aimed primarily at ensuring the high level and quality of life of the population, is constrained by the inefficiency of the functioning of communal infrastructure systems. The high wear and tear of its networks and facilities, as well as the lack of effective management, pose many challenges. The root cause of these problems is in a contradictory system of government, in which municipal authorities, most interested (by their nature) in solving them, are deprived of the necessary resources and opportunities for making effective decisions. The preservation of the situation may lead in the medium term to significant budgetary costs for the restoration of serviceability and the development of communal infrastructure against the background of a further decrease in the quality of infrastructure services. There was a need to change the approach to addressing the problems. The article proposes this kind of approach, based on the redistribution of powers and giving local governments real opportunities to influence the management of communal infrastructure.

scholarly journals Active Learning Discourse: Specifics of Construction (Illustrated by Academic Discourse in English)

2021 ◽  
pp. 48-58
Author(s):  
Irina P. Khоutyz ◽  
Keyword(s):  
Discourse Analysis ◽  
Active Learning ◽  
Discourse Markers ◽  
Academic Discourse ◽  
Factual Information ◽  
Distinctive Features ◽  
Direct Address ◽  
Frequent Use ◽  
High Level

This article dwells on the construction of active learning discourse. The material is comprised of six videos in English, which demonstrate how the active learning format can be applied to a university lecture. These videos were chosen due to their popularity on YouTube and because they present fragments of real university classes accompanied by lecturers’ explanations. The discourse analysis applied found a correlation between lecturers’ linguistic choices and their communicative aim. In addition, the methods of systematization and classification were used. Prior to the analysis, all the videos were transcribed. As a result of the research, typical features of active learning discourse were identified and communicative means of its construction were determined. It was established that this type of discourse can be described as academic and institutional. Frequent use of means of dialogicity and high level of emotionality are among its distinctive features. The study found that when constructing the discourse of active learning, lecturers use factual information, questions, direct address to the audience, repetitions, as well as discourse markers of encouragement and solidarity. As this type of discourse is aimed at motivating students to actively participate in the process of learning, а conclusion is made that active learning discourse can also be described as motivational.

scholarly journals USULAN PERBAIKAN PADA PENERAPAN SISTEM MANAJEMEN KESELAMATAN DAN KESEHATAN KERJA DI PT. SURYA TOTO INDONESIA TBK DIVISI SANITARY DENGAN METODE HIRA DAN FTA

2021 ◽  
Vol 6 (1) ◽  
pp. 27
Author(s):  
Nur Fadilah Fatma ◽  
Dhimas Eka Mustafa Putra
Keyword(s):  
High Risk ◽  
Occupational Safety ◽  
Risk Assessments ◽  
Risk Level ◽  
Potential Hazard ◽  
Occupational Illness ◽  
Root Cause ◽  
Unsafe Behavior ◽  
Medium Level ◽  
High Level

Identification of potential hazards and risk assessments are part of the occupational safety and health program in the risk management stage, which is conducted in an effort to prevent work accidents and occupational illness. The purpose of this research is to identify the potential hazard in PT Surya Toto Indonesia Tbk Sanitary division and analyze the root cause and give suggestion of improvement. Location and time of observation is PT Surya Toto Indonesia Tbk in April until May 2017. Object of observation is potential danger in section Slip Preparing PT Surya Toto Indonesi Tbk. The methods used by the researchers are HIRARC and FTA. The identification of potential hazards and risk assessments undertaken by researchers together with experts, which in this case are OSH officers and local supervisors, resulted in 25 different risks. With the following division, 2 low risk level, 10 medium level risk, 11 high risk level and 2 extreme level risk. After handling by the management of the company against the risk of extreme and high level, there is risk to be 2 high risk and 11 medium level risks. To reduce the value of risk, companies can make safer working conditions and better supervision of employee's unsafe behavior. Keywords: Hazard Potential Identification, Risk Assessment, SMK3, HIRARC, FTA

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