scholarly journals Reinforced Spun Concrete Poles—Case Study of Using Chemical Admixtures

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 302 ◽  
Author(s):  
Romualdas Kliukas ◽  
Arūnas Jaras ◽  
Ona Lukoševičienė
Keyword(s):  
Physical And Mechanical Properties ◽  
Power Lines ◽  
Formaldehyde Resin ◽  
Early Age ◽  
Concrete Members ◽  
Chemical Admixtures ◽  
Spun Concrete ◽  
Overhead Power Lines ◽  
Positive Effect

The current research paper is focused on the experimental investigation of features of chemical admixtures (superplasticizers C-3, ‘Dofen’ and formaldehyde resin ACF-3M) utilizing in reinforced spun concrete structures. For the sake of comparison, the results of studying the effects of chemical admixtures on physical and mechanical properties on vibrated and spun concrete are provided. As a separate part of spun concrete products, the supporting poles of overhead power lines are introduced. The results obtained indicate, that the positive effect of chemical admixtures for spun and vibrated concrete is most pronounced at an early age of concrete. The effective amount of chemical admixtures for spun concrete is 0.15% of cement mass when formaldehyde resin ACF-3M and 1% of cement mass when superplasticizers C-3 and ‘Dofen’ are used. Moreover, the brief review about the reinforced spun concrete members is provided.

scholarly journals What are the important landscape components for habitat selection of the ortolan bunting Emberiza hortulana in northern limit of range?

2015 ◽  
Vol 1 (1) ◽  
pp. 13-25 ◽  
Author(s):  
Jaanus Elts ◽  
Kunter Tätte ◽  
Riho Marja
Keyword(s):  
Agricultural Landscape ◽  
Power Lines ◽  
Population Declines ◽  
Habitat Features ◽  
Crop Density ◽  
Negative Effect ◽  
Emberiza Hortulana ◽  
Ortolan Bunting ◽  
Overhead Power Lines ◽  
Positive Effect

AbstractOrtolan buntings Emberiza hotulana have undergone one of the most severe population declines of any European farmland bird over the last thirty years. The aim of this study was to find out which habitat features, including crop characteristics, ortolan bunting prefers in Estonia in breeding areas. This study compared currently occupied and unoccupied ortolan bunting territories. Occupied areas contained significantly more tall broadleaf trees, crop types, structural elements (trees, bushes, roads, overhead power lines and buildings) and spring wheat, but also had lower crop drilling densities. Ortolan bunting territories were best described by a logistic regression model containing six variables: amount of structural point elements, length of power lines, amount of tall broadleaf trees and number of different crops had a positive effect, whereas crop density and area of autumn-sown crops had a negative effect. Based on the findings of this study, the following conservation measures can be recommended: lower crop densities; spring rather than autumn-sown crops; small-field systems containing a variety of crops; scattered scrub preserved or planted; habitat patches of permanent grasslands, hedges and tall broadleaf trees retained within the agricultural landscape.

A spatially explicit approach to assess the collision risk between birds and overhead power lines: A case study with the little bustard

2014 ◽  
Vol 170 ◽  
pp. 256-263 ◽  
Author(s):  
João Paulo Silva ◽  
Jorge Manuel Palmeirim ◽  
Rita Alcazar ◽  
Ricardo Correia ◽  
Ana Delgado ◽  
...  
Keyword(s):  
Power Lines ◽  
Spatially Explicit ◽  
Collision Risk ◽  
Explicit Approach ◽  
Overhead Power Lines

scholarly journals Determinant of The Financial Literacy: Case Study on Career Woman in Indonesia

ETIKONOMI ◽  
2018 ◽  
Vol 17 (2) ◽  
pp. 285-296
Author(s):  
Novia Dewanty ◽  
Yuyun Isbanah
Keyword(s):  
Marital Status ◽  
Financial Literacy ◽  
Financial Management ◽  
Education Level ◽  
Early Age ◽  
Financial Socialization ◽  
The Government ◽  
Career Woman ◽  
Positive Effect

Financial literacy is one of the relevant facts in improving the economy. The purpose of this study was to examine the influence of demographic factors (i.e., marital status, education level, income, and age) and financial socialization agent on financial literacy. Using online and offline questionnaire survey from 100 respondents in Surabaya, East Java, and the study revealed that education level, personal income, and financial socialization agent, give the positive effect, while the marital status and age does not affect financial literacy. This result implies that the government can focus on educating the development and improvement of financial literacy for the society. It is believed to be a step forward in practicing financial planning from an early age to solve problems with financial management using financial knowledge, financial attitude, and financial behavior.DOI: 10.15408/etk.v17i2.6681

scholarly journals The Impact of Long-Term Physical Salt Attack and Multicycle Temperature Gradient on the Mechanical Properties of Spun Concrete

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4811
Author(s):  
Romualdas Kliukas ◽  
Arūnas Jaras ◽  
Ona Lukoševičienė
Keyword(s):  
Mechanical Properties ◽  
Temperature Gradient ◽  
Ambient Conditions ◽  
Chemical Admixtures ◽  
Cyclic Temperature ◽  
Spun Concrete ◽  
Physical Salt Attack ◽  
The Impact ◽  
Positive Effect

The article is focused on spun concrete made with different chemical admixtures under long-term exposure to aggressive salt-saturated ground water and a cyclic temperature gradient. Over a long-term experimental investigation, 64 prismatic spun concrete specimens were subjected to multicycle (75–120) processing under combined aggressive ambient conditions. Prismatic specimens were soaked in water or saline and dried at a temperature of 45–50 °C. The long-term multi-cycle effect of the temperature gradient and physical salt attack on the compressive strength, Young’s modulus and durability of concrete was found to be negative. Chemical admixtures, though, improved the structure of spun concrete, thus having a significant positive effect on its physical-mechanical properties and durability.

Contamination Lab of Turin (CLabTo)

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Eleonora FIORE ◽  
Giuliano SANSONE ◽  
Chiara Lorenza REMONDINO ◽  
Paolo Marco TAMBORRINI
Keyword(s):  
University Students ◽  
Single Case ◽  
Real Life ◽  
Learning By Doing ◽  
Assessment Data ◽  
Entrepreneurial Skills ◽  
Fields Of Study ◽  
Education Levels ◽  
Positive Effect

Interest in offering Entrepreneurship Education (EE) to all kinds of university students is increasing. Therefore, universities are increasing the number of entrepreneurship courses intended for students from different fields of study and with different education levels. Through a single case study of the Contamination Lab of Turin (CLabTo), we suggest how EE may be taught to all kinds of university students. We have combined design methods with EE to create a practical-oriented entrepreneurship course which allows students to work in transdisciplinary teams through a learning-by-doing approach on real-life projects. Professors from different departments have been included to create a multidisciplinary environment. We have drawn on programme assessment data, including pre- and post-surveys. Overall, we have found a positive effect of the programme on the students’ entrepreneurial skills. However, when the data was broken down according to the students’ fields of study and education levels, mixed results emerged.

CALCULATION OF ACTIVE POWER LOSSES IN THE GROUNDING WIRE OF OVERHEAD POWER LINES

2016 ◽  
Vol 2016 (4) ◽  
pp. 23-25
Author(s):  
A.V. Krasnozhon ◽  
◽  
R.O. Buinyi ◽  
I.V. Pentegov ◽  
◽  
...  
Keyword(s):  
Active Power ◽  
Power Lines ◽  
Power Losses ◽  
Active Power Losses ◽  
Overhead Power Lines

Algorithm for Identifying the Faulty Section in Combined Cable and Overhead Power Lines Based on Surge Portrait Recognition

2018 ◽  
Vol 3 (3) ◽  
pp. 11-17 ◽  
Author(s):  
Aleksandr L. KULIKOV ◽  
◽  
Anton A. LOSKUTOV ◽  
Pavel S. PELEVIN ◽  
◽  
...  
Keyword(s):  
Power Lines ◽  
Overhead Power Lines

Self-reference in early speech of children speaking Slovak

2018 ◽  
Vol 6 (2) ◽  
pp. 14-35
Author(s):  
Jana Kesselová
Keyword(s):  
Individual Case ◽  
Early Age ◽  
Self Awareness ◽  
Upper Limit ◽  
First Occurrence ◽  
Social Deixis ◽  
Self Reference ◽  
Vega 1 ◽  
Slovak Language

Abstract The study focuses on the process of being aware of own I in children acquiring Slovak language at an early age and living in a Slovak family. The aim of the research is to understand the process of acquiring the means by which children refer to themselves in the interaction with an adult person. The research uses the qualitative longitudinal method of individual case study. A child’s speech is researched from the very first occurrence of a self-reference mean in 16th month up to the upper limit of early age (36th month) and all that is based on audio-visual records transcripts. The following are researched: (a) succession of self-reference means acquisition in early childhood, (b) function of self-reference linguistic means, (c) process of child’s self-awareness. The results obtained based on the linguistic data in Slovak language are compared with the results of similarly focused researches in English, French, Polish, Russian and Bulgarian language. The research reveals some constants in the development of self-reference instruments that can be observed throughout various language-cultural environments. The research is a part of solutions within the grant project VEGA 1/0099/16 Personal and Social Deixis in Slovak Language.

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