Participating in Management: Union Organizing on a New Terrain

[Excerpt] Seasoned organizers know that all organizing begins one-on-one at your base. The workplace is labor\u27s base and, therefore, the key to the labor movement meeting its many challenges in the 1990s — among them, building stronger worker-to-worker and union-to-union solidarity; being broadly perceived as a champion of the public\u27s interest; and attracting large numbers of new workers into its fold. American society cannot be made better unless there is a thriving, more powerful labor movement. And before labor can help create this better society, it must first take care of its crumbling base

Daily Eastern News: February 06, 2001

https://thekeep.eiu.edu/den_2001_feb/1003/thumbnail.jp

Modelling of a rope-free passenger transportation system for active cabin vibration damping

Conventional vertical passenger transportation is performed by lifts. Conventional traction-drive electrical lifts use ropes to transfer the rotational motion of an electrical motor into a vertical motion of the cabin. The vertical passenger transportation system discussed in this paper does not use any ropes, the motor directly provides a driving force, which moves the cabin. This new propulsion is realized through an electrical linear motor. The use of the linear motor requires a new design of the passenger transportation system (PTS), which includes reducing the weight of the car through lightweight construction. The reduced stiffness of the lightweight design renders the construction more vulnerable to vibrations. In order to improve ride quality of the transportation system it is necessary to develop new concepts to damp the vibrations. One way to increase stiffness characteristics of the system is to introduce active damping components to be used alongside passive damping components. It is essential to derive a dynamic model of the system in order to design and also later control these damping components in the best possible way. This paper describes the fundamental steps undertaken to derive a dynamic model for designing and controlling active damping components for the new type of vertical PTS. The model is derived as a Multi-Body System (MBS), where the connections between the bodies are modelled as spring damper elements. The derivation of the MBS is demonstrated on a transportation system, consisting of three main components: a sledge, holding the rotor of the linear motor; a mounting frame, which is used to provide support for the cabin; and the actual cabin. The modelling of the propulsion system, thus the electrical part of the PTS, will not be the focus of this work

Evaluating a holistic energy benchmarking parameter of lift systems by using computer simulation

At present, there are benchmarking parameters to assess the energy performance of lifts, e.g. one in Germany adopted by VDI (4707-1/2), one internationally published by ISO (BS EN ISO 25745-2:2015), and the other in Hong Kong adopted by The Hong Kong Special Administrative Region (HKSAR) Government. These parameters are mainly checking the energy consumed by a lift drive without considering real time passenger demands and traffic conditions; the one in Hong Kong pinpointing a fully loaded up-journey under rated speed and the two in Europe pinpointing a round trip, bottom floor to top floor and return with an empty car, though including energy consumed by lighting, displays, ventilation etc. A holistic normalization method by Lam et al [1] was developed a number of years ago by one of the co-authors of this article, which can assess both drive efficiency and traffic control, termed J/kg-m, which is now adopted by the HKSAR Government as a good practice, but not specified in the mandatory code. In Europe, the energy unit of Wh has been used but here, Joule (J), i.e. Ws, is adopted to discriminate the difference between the two concepts. In this article, this parameter is evaluated under different lift traffic scenarios using computer simulation techniques, with an aim of arriving at a reasonable figure for benchmarking an energy efficient lift system with both an efficient drive as well as an efficient supervisory traffic control

A study into the influence of the car geometry on the aerodynamic transient effects arising in a high rise lift installation

One of the main goals in designing a high-speed lift system is developing a more aerodynamically efficient car geometry that guarantees a good ride comfort and reduces the energy consumption. In this study, a three-dimensional computational fluid dynamics (CFD) model has been developed to analyse an unsteady turbulent air flow around two cars moving in a lift shaft. The paper is focused on transient aerodynamic effects arising when two cars pass each other in the same shaft at the same speed. The scenarios considered in the paper involve cars having three different geometries. Aerodynamic forces such as the drag force that occur due to the vertical opposite motions of the cars have been investigated. Attention is paid to the airflow velocity and pressure distribution around the car structures. The flow pattern in the boundary layer around each car has been calculated explicitly to examine the flow separation in the wake region. The results presented in the paper would be useful to guide the lift designers to understand and mitigate the aerodynamic effects arising in the lift shaft

Mustang Daily, April 17, 2008

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.https://digitalcommons.calpoly.edu/studentnewspaper/7746/thumbnail.jp

Garden Cities of the 21st Century

It has been more than 100 years since Ebenezer Howard published his epochal book on social reform that ultimately won him world recognition. Published first in 1898 as 'Tomorrow: A Peaceful Path to Real Reform', it was followed by revised publications in 1902, 1946 and 1965 under its present more evocative title, ‘Garden Cities of Tomorrow'. The multiplicity of editions testifies to a continued interest to secure a harmonious existence between humans and their natural environment. Influenced by the conventional wisdom of the time, deviations from the original 1898 publication by Howard of his town plan and his social and financial proposals affected the design and implementation of the prototype city of Letchworth built in 1903. Ignoring the drawings and writings of Howard’s book, the Letchworth model, because it was completed within the lifetime of Howard, was seen and accepted as the de facto model from which future garden cities could be reproduced. Duplication of the Letchworth prototype in Europe and North America, as a result of the deviations, led to incomplete, inaccurate or dysfunctional replications. The Letchworth concept of garden cities must be considered to have failed to reach the goal Howard had hoped to achieve: a distribution of sustainable, benign urban environments with an equitable and wholesome quality of life in a rural setting. More than a full century has elapsed since Howard wrote his book and the world has entered a new millennium. New technologies, changing demographics and, most importantly, emerging social and environmental circumstances raise the possibility that the concept of garden cities could be revisited to determine that, if adapted to meet the constraints and needs of the 21st century, could reach the goals envisaged by Howard. To reach this goal would require a return to the writings and drawings of his original work, 'Tomorrow: A Peaceful Path to Real Reform', and a departure, independent of previous attempts to interpret the content of Howard’s dream for all societies