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Factors Affecting Workability

Factors Affecting Workability

The workability of concrete is a critical characteristic that influences the ease of mixing, handling, and finishing the concrete. It is affected by several factors including water content, aggregate properties, and admixtures like air entrainment. Water plays a fundamental role as it lubricates the concrete mix, facilitating easier movement and placement. However, the water requirement varies depending on the texture and shape of aggregates. Finer particles and angular, rough-textured...

Design of Prismatic Beams for Bending

Design of Prismatic Beams for Bending

The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and stress...

Controller Configurations

Controller Configurations

Controller configurations are crucial in a car's cruise control system because they manage speed over time to maintain a consistent pace regardless of road conditions, thereby meeting design goals. In traditional control systems, fixed-configuration design involves predetermined controller placement. System performance modifications are known as compensation.
Control-system compensation involves various configurations, most commonly series or cascade compensation, in which the controller aligns...

Design Example: Managing Concrete Workability

Design Example: Managing Concrete Workability

This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
To address...

Design Consideration

Design Consideration

Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key aspect...

Prismatic Beams: Problem Solving

Prismatic Beams: Problem Solving

In the design of a supported timber beam subjected to a distributed load, both the beam's physical dimensions and the timber's characteristics, such as its grade and species, are critical. These factors determine the allowable stress values, which are crucial for calculating the necessary beam depth to ensure structural integrity and safety.
The design begins with analyzing the beam as a free body to identify moments and force balances, thereby determining support reactions. Next, the designer...

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Related Experiment Video

Updated: Jun 28, 2026

Operant Procedures for Assessing Behavioral Flexibility in Rats

Operant Procedures for Assessing Behavioral Flexibility in Rats

Published on: February 15, 2015

[Basic dimensions of work design: new inputs to functional flexibility].

Manuel Fernández Ríos¹, Rafael San Martín Castellanos, Jesús María de Miguel Calvo

¹Facultad de Psicología, Universidad Autónoma de Madrid, Madrid, Spain. mf.rios@uam.es

|October 23, 2008

Summary

Human work design research identified four key factors: demand-adaptation, flexibility-polyvalence, improvement-autonomy, and conciliation-participation. These variables are crucial for effective work design, regardless of company environment or technology.

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A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance

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Operant Procedures for Assessing Behavioral Flexibility in Rats

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A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance

A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance

Published on: May 7, 2014

Area of Science:

Organizational Psychology
Human Resource Management
Sociology of Work

Context:

Despite a century of research, human work design has yielded unsatisfactory results.
Renewed interest in human work design is currently not producing novel findings.

Purpose:

To identify the definitive variables influencing human work design.
To validate previous research through empirical investigation.

Summary:

Two empirical studies involving 660 and 310 companies identified four consistent factors: demand-adaptation, flexibility-polyvalence, improvement-autonomy, and conciliation-participation.
These four factors are independent of the company's environment and technology type.
Enterprise size was found to be a factor that influences these findings.

Impact:

Provides a validated framework for understanding and improving human work design.
Offers actionable insights for organizations seeking to optimize work structures.
Highlights the universal applicability of identified factors across diverse business settings.