Tien‐Fu Lu, Daniel C. Handley, Yuen Kuan Yong and Craig Eales
Micromanipulation has enabled numerous technological breakthroughs in recent years, from advances in biotechnology to microcomponent assembly. Micromotion devices commonly use…
Abstract
Micromanipulation has enabled numerous technological breakthroughs in recent years, from advances in biotechnology to microcomponent assembly. Micromotion devices commonly use piezoelectric actuators (PZT) together with compliant mechanisms to provide fine motions with position resolution in the nanometre or even sub‐nanometre range. Many multiple degree of freedom (DOF) micromotion stages have parallel structures due to better stiffness and accuracy than serial structures. This paper presents the development of a three‐DOF compliant micromotion stage with flexure hinges and parallel structure for applications requiring motions in micrometres. The derivation of a simple linear kinematic model of the compliant mechanism is presented and simulation results before and after calibration are compared with results from finite element (FE) modeling and experiments. The position control system, which uses an experimentally determined constant‐Jacobian, and its performance are also presented and discussed.
Details
Keywords
Abstract
Details
Keywords
The Marathon I (M.60) is an all‐metal, short/medium‐range aeroplane capable of carrying a maximum of 22 passengers or, by simple adaptation, freight and mixed cargo. Two flight…
Abstract
The Marathon I (M.60) is an all‐metal, short/medium‐range aeroplane capable of carrying a maximum of 22 passengers or, by simple adaptation, freight and mixed cargo. Two flight crew (first pilot and second pilot/navigator) are carried; radio is installed immediately aft of the cockpit on the starboard side while directly opposite this location provision is made for a forward freight compartment or a seat for a third crew member. A toilet can be fitted on the left‐hand side of the passenger cabin just aft of the entrance door and a space at the rear on the‐right hand side can be utilized as a wardrobe.
Ifeoma Ajunwa and Daniel Greene
This chapter lays out a research agenda in the sociology of work for a type of data and organizational intermediary: work platforms. As an example, the authors employ a case study…
Abstract
This chapter lays out a research agenda in the sociology of work for a type of data and organizational intermediary: work platforms. As an example, the authors employ a case study of the adoption of automated hiring platforms (AHPs) in which the authors distinguish between promises and existing practices. The authors draw on two main methods to do so: critical discourse analysis and affordance critique. The authors collected and examined a mix of trade, popular press, and corporate archives; 135 texts in total. The analysis reveals that work platforms offer five core affordances to management: (1) structured data fields optimized for capture and portability within organizations; (2) increased legibility of activity qua data captured inside and outside the workplace; (3) information asymmetry between labor and management; (4) an “ecosystem” design that supports the development of limited-use applications for specific domains; and (5) the standardization of managerial techniques between workplaces. These combine to create a managerial frame for workers as fungible human capital, available on demand and easily ported between job tasks and organizations. While outlining the origin of platform studies within media and communication studies, the authors demonstrate the specific tools the sociology of work brings to the study of platforms within the workplace. The authors conclude by suggesting avenues for future sociological research not only on hiring platforms, but also on other work platforms such as those supporting automated scheduling and customer relationship management.
Details
Keywords
The Minister of Aviation, Mr Fred Mulley, has re‐appointed Sir Daniel Jack, K.B.E., as Chairman of the Air Transport Licensing Board for a further term, until September 30, 1968…
Abstract
The Minister of Aviation, Mr Fred Mulley, has re‐appointed Sir Daniel Jack, K.B.E., as Chairman of the Air Transport Licensing Board for a further term, until September 30, 1968, and Mr J. J. Taylor, O.B.E., as Deputy Chairman until September 30, 1967.
There have been many innovations in public finance in the 21st century to address increasing budget constraints and increasing demands from government. One innovation has been…
Abstract
There have been many innovations in public finance in the 21st century to address increasing budget constraints and increasing demands from government. One innovation has been civic crowd-funding which began in 2009. This is predicated on the voluntary commitment of funds by individual and institutional donors and investors for specific projects. This paper explores this new approach to funding capital projects and grounds it within a discussion of the Voluntary Theory of Public Finance. There is a lack of research on civic crowd-funding and a lack of theoretical approaches to it. This paper draws these connections and develops future directions of research that includes the continuing application of this approach, the increasing engagement of citizens in the administrative process of government and increasing budget constraints.
As a result of the election held in March the Council of the Royal Aeronautical Society for the year 1939–1940 is constituted as follows: