Drive Axle of Vehicle and Environment Impact

2022 ◽  
pp. 656-662
Author(s):  
A. Yu. Barykin ◽  
M. M. Mukhametdinov ◽  
R. Kh. Takhaviev
Keyword(s):  
Environment Impact ◽  
Drive Axle

A new handbook on structural concrete service life assignment taking into account the operating environment impact in their life cycle

2020 ◽  
pp. 126-134
Author(s):  
Vyacheslav Falikman ◽  
◽  
Valentina Stepanova ◽  
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Operating Environment ◽  
Environment Impact ◽  
Structural Concrete ◽  
Concrete Service

В статье систематизированы основные критерии, необходимые для определения нормативных сроков эксплуатации бетонных и железобетонных конструкций, проведен анализ состояния отечественной и зарубежной нормативной базы в отношении требований к срокам службы железобетонных конструкций, рассмотрены основные нормативно-технические документы в области проектирования железобетонных конструкций зданий и сооружений по их жизнен-ному циклу. Описаны виды коррозионных повреждений железобетонных конструкций и определяющие их факторы, приведены согласованные на международном уровне модели долговечности для некоторых деградационных процессов. На основе проведенных работ подготовлены предложения по оценке коррозионного состояния эксплуатировавшихся железобетонных конструкций, их остаточной несущей способности, эксплуатационной пригодности, ожидаемого срока службы в заданных агрессивных условиях и методов определения нормативных сроков службы железобетонных конструкций. Даны предложения по разработке и актуализации ряда релевантных нормативных, технических и организационно-методических документов.

An Exploratory Study of the Online Learning Environment

2013 ◽  
Vol 29 (1) ◽  
pp. 117-147 ◽  
Author(s):  
Cynthia J. Khanlarian ◽  
Rahul Singh
Keyword(s):  
Learning Environment ◽  
Student Performance ◽  
It Use ◽  
Environment Impact ◽  
Web Based ◽  
Improve Student Performance ◽  
Research Questions ◽  
The Impact ◽  
Relevant Factors ◽  
Significant Factors

ABSTRACT Web-based homework (WBH) is an increasingly important phenomenon. There is little research about its character, the nature of its impact on student performance, and how that impact evolves over an academic term. The primary research questions addressed in this study are: What relevant factors in a WBH learning environment impact students' performance? And how does the impact of these factors change over the course of an academic term? This paper examines and identifies significant factors in a WBH learning environment and how they impact student performance. We studied over 300 students using WBH extensively for their coursework, throughout a semester in an undergraduate class at a large public university. In this paper, we present factors in the WBH learning environment that were found to have a significant impact on student performance during the course of a semester. In addition to individual and technological factors, this study presents findings that demonstrate that frustration with IT use is a component of the learning environment, and as a construct, has a larger impact than usefulness on student performance at the end of a course. Our results indicate that educators may benefit from training students and engaging them in utility of co-operative learning assignments to mitigate the level of frustration with the software in the WBH learning environment and improve student performance.

scholarly journals The Urban Environment Impact of Climate Change Study and Proposal of the City Micro-Environment Improvement

2021 ◽  
Vol 13 (8) ◽  
pp. 4096
Author(s):  
Jozefína Pokrývková ◽  
Ľuboš Jurík ◽  
Lenka Lackóová ◽  
Klaudia Halászová ◽  
Richard Hanzlík ◽  
...  
Keyword(s):  
Management Practices ◽  
Water Infiltration ◽  
Environment Impact ◽  
Management Procedures ◽  
Aging Infrastructure ◽  
Continue Research ◽  
Rainwater Management ◽  
The Given ◽  
The City ◽  
Very High

The water management of cities and villages faces many challenges. Aging infrastructure systems operate for many years after their theoretical lifetime (operation) with a very high need for reconstruction and repair. The solution is proper rainwater management. The investigated area is part of the cadastral area of the Nitra city. This article is based on the use of geographic information systems (GIS) as tools in proposing water retention measures that are needed to improve the microenvironment of the city. We proceeded in several steps, which consisted of area analysis, survey, surface runoff calculations in urbanized areas, proposal of a suitable solution for given location. For real possibilities of rainwater management procedures, a new site on the outskirts of the city was selected. In the given locality, it was possible to use water infiltration as a solution. The locality has suitable conditions of land ownership, pedological conditions, the slope of the area and also the interest of the inhabitants in the ecological solution. The outlined study indicates the need to continue research on the reliability of rainwater management practices.

scholarly journals Reliability estimation for drive axle of wheel loader under extreme small sample

2019 ◽  
Vol 11 (3) ◽  
pp. 168781401983684 ◽  
Author(s):  
Leilei Cao ◽  
Lulu Cao ◽  
Lei Guo ◽  
Kui Liu ◽  
Xin Ding
Keyword(s):  
Sample Size ◽  
Promising Result ◽  
Small Sample Size ◽  
Bootstrap Method ◽  
Estimation Method ◽  
Small Sample ◽  
Reliability Estimation ◽  
Fatigue Reliability ◽  
Drive Axle ◽  
Semi Empirical

It is difficult to have enough samples to implement the full-scale life test on the loader drive axle due to high cost. But the extreme small sample size can hardly meet the statistical requirements of the traditional reliability analysis methods. In this work, the method of combining virtual sample expanding with Bootstrap is proposed to evaluate the fatigue reliability of the loader drive axle with extreme small sample. First, the sample size is expanded by virtual augmentation method to meet the requirement of Bootstrap method. Then, a modified Bootstrap method is used to evaluate the fatigue reliability of the expanded sample. Finally, the feasibility and reliability of the method are verified by comparing the results with the semi-empirical estimation method. Moreover, from the practical perspective, the promising result from this study indicates that the proposed method is more efficient than the semi-empirical method. The proposed method provides a new way for the reliability evaluation of costly and complex structures.

Effect of tubing material on conventional and thin FBG sensor for embedded environment impact monitoring of CFRP composites

2016 ◽  
Author(s):  
Yurim Park ◽  
Pratik Shrestha ◽  
Hyunseok Kwon ◽  
Jin-Hyuk Kim ◽  
Heejung Kwon ◽  
...  
Keyword(s):  
Environment Impact ◽  
Fbg Sensor ◽  
Impact Monitoring ◽  
Cfrp Composites ◽  
Tubing Material

scholarly journals How Dead Wood in the Forest Decreases Relaxation? The Effects of Viewing of Dead Wood in the Forest Environment on Psychological Responses of Young Adults

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 871
Author(s):  
Emilia Janeczko ◽  
Ernest Bielinis ◽  
Ulfah Tiarasari ◽  
Małgorzata Woźnicka ◽  
Wojciech Kędziora ◽  
...  
Keyword(s):  
Young Adults ◽  
Dead Wood ◽  
Short Exposure ◽  
Managed Forests ◽  
Environment Impact ◽  
Forest Environment ◽  
Dead Trees ◽  
Before And After ◽  
Positive Feelings ◽  
The Impact

The intensity of the neutral environment impact on humans may be determined by specific features of space, including dead wood occurrence. Dead wood is claimed to be disliked by the public because it reduces the scenic beauty and recreational values of the forest. The attractiveness of a forest with dead wood may be determined by its variants. Much is known about the preference for landscape with dead wood, but there is little information available about how such a landscape affects a person’s mental relaxation, improves mood, increases positive feelings, levels of vitality, etc. Hence, the aim of our research was to investigate the psycho-logical relaxing effects of short 15-min exposures to natural and managed forests with dead wood. In the study, three areas within the Białowieża Primeval Forest were used to measure the impact of different types of forest with dead wood (A: forest reserve with dead wood subject to natural decomposition processes; B: managed forest with visible cut wood and stumps; C: man-aged forest with dead trees from bark beetle outbreak standing) on human psychological relaxation in a randomized experiment. The participants of the experiment were forty-one young adults aged 19–20. Each respondent experienced each type of forest at intervals visiting it. Four psychological questionnaires were used in the project (Profile of Mood States (POMS), Positive and Negative Affect Schedule (PANAS), Subjective Vitality Scale (SVS), and Restorative Outcome Scale (ROS)) before and after the short exposure to the forest were evaluated. The results show that a forest landscape with dead wood affects the human psyche, and the relaxing properties of such a landscape are better in a protected forest with natural, slow processes of tree dieback than those obtained in managed forests

Functional States as a Psychological Safety Component of the Offshore Oil Production Platform Employees at the Rotational Labor Organization in the Caspian Sea

2021 ◽  
pp. 85-91
Author(s):  
Ya.A. Korneeva ◽  
Keyword(s):  
Caspian Sea ◽  
Occupational Safety ◽  
Psychological Safety ◽  
Psychological Testing ◽  
Well Being ◽  
Individual Performance ◽  
Environment Impact ◽  
The Caspian Sea ◽  
Functional States ◽  
Offshore Oil

The study is devoted to identifying and describing the features of functional states as a component of the employees psychological safety, as well as occupational safety during fly-in-fly-out regime on an offshore oil platform. The scientific expedition worked in April 2019 during the entire fly-in-fly-out visit on the platform in the Caspian Sea. 50 employees took part, whose average age was 36.17 ± 1.064 years, the average work experience by the fly-in-fly-out method was 7.97 ± 0.839 years. The duration of the rotation period is 14 days. Research methods are: hardware psychophysiological and psychological testing. The first ones were used to assess the state: the level of stress (the AngioScan device), the operator efficiency, the level of the functional state and functional reserves (the Psychophysiologist device). For psychological testing, the color test of M. Lusher and the questionnaire of self-assessment of states «Well-being. Activity. Mood» were selected. Statistical analysis of the research results was performed with the help of descriptive statistics and multidimensional methods using IBM SPSS Statistics 23.0 software package. All the employees are divided into two groups according to the individual performance: the first cluster with high performance, the second cluster with reduced performance. As a result of studying the relationship between the efficiency and occupational safety subjective characteristics it was found that employees of the first cluster (with high personal efficiency) are better adapted to the negative environment impact and are characterized by high psychological safety and high occupational safety. Representatives of the second cluster (with reduced personal efficiency) are not satisfied with the work schedule, give higher assessments of hazard of professional situations, but at the same time commit more violations of occupational safety. For these reasons, the employees with reduced efficiency (the second cluster) belong to the risk group, which requires additional measures from the managers to ensure their psychological safety and improve occupational safety at work.

Impact of paternal presence and parental social-demographic characteristics on birth outcomes

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Amruta A. Bamanikar ◽  
Shetal Shah ◽  
David Aboudi ◽  
Soumya Mikkilineni ◽  
Clare Giblin ◽  
...  
Keyword(s):  
Birth Outcomes ◽  
Gestational Age ◽  
Neonatal Intensive Care ◽  
Post Partum ◽  
Birth Certificate ◽  
Cross Sectional Study ◽  
Environment Impact ◽  
Cross Sectional ◽  
Post Partum Period ◽  
Paternal Race

Abstract Objectives Maternal race, marital status, and social environment impact risk of preterm delivery and size for gestational age. Although some paternal characteristics such as age are associated with pregnancy outcomes, the influence of the paternal presence, race/ethnicity and adverse life events is not well known. The objective of the study was to assess birth outcomes in mothers with a paternal presence compared to those without during the post-partum period. The secondary aim was to determine whether paternal race is associated with birth outcomes. Methods This was a cross-sectional study using parental surveys linked with birth certificate data from 2016 to 2018. Adverse birth composite outcomes (ABCO) including small for gestational age (SGA), prematurity or neonatal intensive care unit admission (NICU) were assessed. Results A total of 695 parents were analyzed (239 single mothers and 228 mother-father pairs). Compared to mothers with a father present, mothers without a father present exhibited increased odds of ABCO, prematurity and NICU. Non-Hispanic Black fathers had increased odds of ABCO and NICU compared to Non-Hispanic Whites (NHW). Hispanic fathers had increased odds of NICU compared to NHW. Conclusions Paternal absence in the post-partum period and paternal race were both independently associated with ABCO and NICU. Assessment of paternal presence and paternal race in clinical practice may help identify opportunities for additional support necessary to optimize birth outcomes.

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