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Rather than organize as traditional firms, many of today’s companies organize as platforms that sit at the nexus of multiple exchange and production relationships. This chapter considers a most basic question of organization in platform contexts: the choice of boundaries. Herein, I investigate how classical economic theories of firm boundaries apply to platform-based organization and empirically study how executives made boundary choices in response to changing market and technical challenges in the early mobile computing industry (the predecessor to today’s smartphones). Rather than a strict or unavoidable tradeoff between “openness-versus-control,” most successful platform owners chose their boundaries in a way to simultaneously open-up to outside developers while maintaining coordination across the entire system.

Theories of sociotechnical change seek to understand technology as both material and social artifacts. Actor‐network theory (ANT) offers an approach to sociotechnical change that has been criticized for emphasizing a micro‐level analysis of political strategies at the expense of larger social and cultural processes. This paper presents an approach to sociotechnical change that links the enrollment process of ANT with broader social practices, through the concept of inclusion in multiple technological frames. Inclusion in different technological frames is used to explain the sources of enrollment strategies in the early personal digital assistant (PDA) industry. Two case studies of PDA evolution (Psion, led by David Potter, and Palm, led by Jeff Hawkins) are used to illustrate the link between enrollment strategies and inclusion.

The basic theme of this issue's column is electronic documents and portable computers. I was surprised myself to discover that these subjects are related. On the subject of portable computers, I see the market separating out into four distinct layers. These are the big 386 machines that only run on mains power and could even serve as a desktop machine, the 286 portables that weigh anything from 7 to 15 lb., the lightweight 8086 machines and the new ‘palmtop’ computers. In this issue I look at the last category, reviewing the Atari Portfolio. For anyone interested in portables, there is a review of 73 of them in PC Magazine, 9, 5,13 March 1990.

Follows a previous paper which outlined a “performance pyramid” model, designed to enable interface managers to relate the key performance indicators of their business to working environment effectiveness. The concept allows managers to communicate more easily the value‐added contribution of the working environment to the organization, through close communication with finance, human resources and operations managers in strategic decision making. For reasons of client confidentiality, uses a fictional case study which includes real experiences observed in a number of organizations and puts these elements together under the performance pyramid model.

Recently the advances in wireless communication technology and the popularity of portable computers have rendered mobile computing environments from which mobile users with battery‐operated palmtops can access the information via wireless channels, without space and time restriction. In mobile computing environments, mobile users cache the data items to use the bandwidth efficiently and improve the response time of mobile transactions. If the data items cached in mobile users are updated at the server, the server broadcasts an invalidation report for maintaining the cache consistency of mobile users. However, this method has an obstacle that does not guarantee the serializable execution of mobile transactions. The purpose of this paper is to propose the four types of reports for mobile transaction (FTR‐MT) method for ensuring the serializable execution of mobile transactions.

The paper describes the FTR‐MT method, which is composed of four types of algorithms, e.g. group report composition algorithm, immediate commit decision algorithm, cache consistency algorithm, and disconnection cache consistency algorithm. FTR‐MT method for improving the response time of mobile transactions makes a commit decision by using the four types of reports.

With the FTR‐MT method, mobile users can make a commit decision by using the four types of reports. The response time of mobile transactions can be reduced. Furthermore, the FTR‐MT method can improve the cache efficiency in the case that the disconnection of mobile users is longer than the broadcast interval of the window report.

This paper proposes a new method for guaranteeing the serializable execution of mobile transactions, called FTR‐MT, using four types of reports. Also, it can prevent the entire cache dropping, even though the disconnection of a mobile host is longer than the broadcast interval of a window report. Through the analytical model, this method is felt to be superior to other methods, in terms of the average response time and the commit rate of mobile transactions, and bandwidth usage.

The purpose of this paper is to investigate the effect of staffing levels (one or two staff) on the amount of assistance provided to residents in one group home, and associated levels of resident engagement in activities prior to and following the implementation of active support.

Data on staff assistance and resident engagement were gathered by direct observation across six pre‐test and post‐test 80‐minute sessions, using palmtop computers. Percentage of all non‐overlapping data, an index of effect size, was used to analyse these data.

There was no clear benefit from additional staffing prior to active support training, in terms of staff assistance or resident engagement in activity. However, at post‐test, having two staff yielded increased staff assistance, but with limited evidence of increased resident engagement, despite more continuous staff assistance.

This is the first active support study to examine the impact of staffing levels on resident engagement and staff assistance. Implications for service management and research are presented.

A low power flip-flop circuit is designed for energy-efficient devices. Digital sequential circuits are in huge demand because every processor has most of the parts of digital circuit. The sequential circuits consist of a basic data storing element, a latch is used to store single bit data. The flip-flop takes a sufficient portion of the total chip area and overall power consumption as well. This study aims to the low power energy-efficient applications like laptops, mobile phones and palmtops.

This paper proposes a new type of flip-flop that consists of the only 16 transistors with a single-phase clock. The flip-flop has two blocks, master and slave latch. In this design, the authors have focused on only master latch, which includes a level restoring circuit. It is used to help the master latch in data retention process. The latch circuit has two inverters in back-to-back arrangement. The proposed flip-flop is implemented on 65 nm complementary metal oxide semiconductor technology using Cadence Virtuoso environment and compared with other reported flip-flops.

The proposed flip-flop architecture outperformed the peak percentage, i.e. 79.25% as compared to transmission gate flip-flop and a minimum of 20.02% compared to 18 T true single phase clocking (TSPC) improvement in terms of power. It also improved C to Q delay and power delay product. In addition, by reducing the number of transistors the total area of the proposed flip-flop is reduced by a minimum of 13.76% with respect to 18TSPC and existing flip-flop. For reliability checking the Monte Carlo simulation is performed for thousand samples and it is compared with the recently reported 18TSPC flip-flop.

This work is tested by using a test circuit with a load capacitor of 0.2 fF. The proposed work uses a new topology to work as master-slave. Power consumption of this technique is very less and it is best suitable for low power applications. This circuit is working properly up to 2 GHz frequency.

This work is proposed for low power energy-efficient applications like laptops, mobile phones, and palmtops. In this study, P-channel metal–oxide–semiconductor (PMOS)’s are used as access transistor in 7 transistors (7 T) Static Random Access Memory (SRAM) cell, and the theoretical Static Noise Margin (SNM) analysis for the proposed cell is also performed. A cell is designed using 7 T which consists of 4 PMOS and 3 NMOS. In this paper write and hold SNM is addressed and read SNM is also calculated for the proposed 7 T SRAM cell.

The authors have replaced N-channel metal–oxide–semiconductor (NMOS) access transistors with the PMOS access transistors, which results in proper data line recovery and provides the desired coupling. An error is likely to occur, if the read operation is performed too often probably by using the NMOS pass gate. It results in an improper recovery of the data line. Instead, by using PMOS as a pass gate, the time required for read operation can be brought down. As we know the mobility (µ) of the PMOS transistor is low, so the authors have used this property into the proposed design. When a low signal is applied to its control gate, the PMOS transistor come up with the desired coupling, when working as a pass gate.

Feedback switched transistor is used in the proposed circuit, which plays an important role in the write operation. This transistor is in OFF state and PMOS’s work as access transistor, when the proposed cell operating in read mode. This helps in the reduction of power. This work is simulated using UMC 40 nm technology node in the cadence virtuoso environment. The simulated result shows that, write power saving of 51.54% and 61.17%, hold power saving of 25.68% and 48.93% when compared with reported 7 T and 6 T, respectively.

The proposed 7 T SRAM cell provides proper data line recovery at a lower voltage when PMOS works as the access transistor. Power consumption is very less in this technique and it is best suitable for low power applications.

Books form an important part of human culture. They can be used to document, entertain, inform and instruct. Conventional approaches to book production have involved either manual or mechanical binding of sheets of paper in order to form an organised, structured, composite entity. New publication media now offer many alternative approaches to the creation of books and the ways in which they can be disseminated and used. This paper therefore discusses the growing importance of electronic publication. It then uses a case study to illustrate the influence that online books and other forms of electronic document might have on conventional publishing processes.

This study provides insights into the early market for e‐books in the UK through survey research with members of a large online panel.

Data were collected from an online panel established by a leading commercial internet research company. Members of the panel are signalled each week to take part in web surveys. Respondents completed an online questionnaire posted on the company's web site. Questions explored awareness, trialling, purchase and borrowing of e‐books, examining the frequency of such behaviour and types of publications accessed and/or obtained.

A significant proportion of respondents (85 per cent) were aware of e‐books. Among these respondents, around half (49 per cent) had made trial use of them, nearly four in ten (38 per cent) had bought at least one e‐book, and one in seven (13 per cent) had borrowed an e‐book from a library. Technical books and non‐fiction publications related to hobbies and interests were among those most popularly used and bought. The main perceived advantages of e‐books are that they can be obtained more conveniently than going via a bookstore and they are often cheaper than hard copy versions.

This online survey was dependent on respondent self‐selection. This meant that there was no central control over the return sample profile.

This survey provided an early look at the e‐book market in the UK. Findings indicated the market potential of e‐books given that the equipment needed to read them is regarded neither as too expensive nor too difficult to use. It is clear, however, that early e‐book users regard electronic reading as something to use primarily for reference work than for more extended reading for leisure and entertainment. Most e‐book users (56 per cent) still preferred not to read extended passages of text from a screen. Nonetheless, for dipping in and out of reference works e‐books have the advantage of being easier to search and easier to annotate.