Search results

The purpose of this paper is to establish an orbital launch window for manned Moon‐to‐Earth trajectories to support China's manned lunar landing mission requirements of high‐latitude landing and anytime return, i.e. the capability of safely returning the crew exploration vehicle at any time from any lunar parking orbit. The launch window is a certain time interval during which the transearth injection may occur and result in a safe lunar return to the specified landing site on the surface of the Earth.

Using the patched conic technique, an analytical design method for determining the transearth trajectories is developed with a finite sphere of influence model. An orbital launch window has been established to study the mission sensitivities to transearth trip time and energy requirements. The results presented here are limited to a single impulsive maneuver.

The difference between the results of the analytical model and high‐fidelity model is compared. This difference is relatively small and can be easily eliminated by a simple differential correction procedure. The launch window duration varies with launch date, from less than one hour to greater than 20 h, and the launch window occurs every day in the sidereal month.

The solution can be used to serve as an initial estimate for future optimization procedures.

The orbital launch window can be used to provide the basis for the preparation of an orbital launch timetable compatible with lunar missions and re‐entry conditions requirements.

Previous studies were mainly concentrated on the launch windows for the departure from the Earth. This paper investigates and establishes the orbital launch window for Moon‐to‐Earth trajectories.

The purpose of this paper is to attempt an aerospaceplane design with the objective of Low-Earth-Orbit-and-Return-to-Earth (LEOARTE) under the constraints of safety, low cost, reliability, low maintenance, aircraft-like operation and environmental compatibility. Along the same lines, a “sister” point-to-point flight on Earth Suborbital Aerospaceplane is proposed.

The LEOARTE aerospaceplane is based on a simple design, proven low risk technology, a small payload, an aerodynamic solution to re-entry heating, the high-speed phase of the outgoing flight taking place outside the atmosphere, a propulsion system comprising turbojet and rocket engines, an Air Collection and Enrichment System (ACES) and an appropriate mission profile.

It was found that a LEOARTE aerospaceplane design subject to the specified constraints with a cost as low as 950 United States Dollars (US$) per kilogram into Low Earth Orbit (LEO) might be feasible. As indicated by a case study, a LEOARTE aerospaceplane could lead, among other activities in space, to economically viable Space-Based Solar Power (SBSP). Its “sister” Suborbital aerospaceplane design could provide high-speed, point-to-point flights on the Earth.

The proposed LEOARTE aerospaceplane design renders space exploitation affordable and is much safer than ever before.

This paper provides an alternative approach to aerospaceplane design as a result of a new aerodynamically oriented Thermal Protection System (TPS) and a, perhaps, improved ACES. This approach might initiate widespread exploitation of space and offer a solution to the high-speed “air” transportation issue.

Purpose – This chapter describes the problem of and approaches to ex-inmates with psychiatric disabilities exiting correctional custody. Although all ex-inmates must find housing and employment, persons with psychiatric disabilities require linkages to various health-related services and supports. These linkages are necessary, but it is unknown whether they are sufficient because discharge planning services and transition programs for ex-inmates with psychiatric disabilities historically lack an evidence base.

Approach – After a decade, the first-generation re-entry programs for ex-inmates with psychiatric disabilities have yielded little in the way of empirical data, but they have provided models for program expansion and imperatives for second-generation program assessment. Related research findings for first- and second-generation programs are highlighted with an emphasis on a unique statewide program in Massachusetts.

Findings – A review of the first- and second-generation programs suggests that progress has been slow in identifying empirically supported best practices for this population. There is a growing evidence base that community reintegration outcomes for ex-inmates with psychiatric disabilities are the result of demographic and criminal history variations, yet implications of these variations needs further exploration in the realms of service access and receptivity as well as variations in postrelease adaptation.

Implications – More knowledge and innovative research is needed on the experience of ex-inmates with psychiatric disabilities and social integration. Resources for cost effectiveness studies as well as long-term follow-up qualitative studies are necessary.

A new reducing valve for aircraft high‐pressure missile gas systems, where a high outlet controlled pressure is necessary, has been developed by The Hymatic Engineering Co. Ltd., Redditch, Wores. Known as type PAS 322, the valve has been designed as part of an integral system and the associated valves with it include relief, solenoid and manually‐operated stop valves. The PAS 322 has outlet pressures of 1,000 to 3,000 Ib./sq. in. which can be controlled at any pre‐set figure with flows up to 15 cu. ft./min. of free air. It has an inlet pressure of up to 6,000 lb./sq. in.

Many young adults who drop out of school elect to re‐enter the secondary education system after a period of absence. Reports the findings from a survey of 215 providers of education to re‐entry students in three states of Australia. Few of these educational providers possess formal qualifications in adult education, but most hold favourable attitudes to working with students who return to school. In general, the re‐entry students were perceived to have high rates of academic success but also high rates of withdrawal. The study identified a number of challenges and problems associated with school re‐entry, and makes recommendations to enhance rates of re‐entry student participation, satisfaction and success. Emphasizes the advantages associated with re‐entering an “innovative” senior secondary environment, rather than a traditional high school.

The purpose of this paper is to examine how repatriates’ emotional support network affects their experience of re-entry.

This inductive, qualitative study is based on 27 semi-structured, in-depth interviews with Belgian organizational repatriates.

The analyses suggest that expatriation empathy is a key attribute of organizational repatriates’ main emotional support providers. In addition, the results show that although partners are a main source of emotional support on re-entry, they are also important potential causes of distress. Lastly, the results suggest that the cultural diversity of a repatriate’s emotional support network is linked with characteristics of the assignment and that it affects the experience of repatriation.

The results provide empirical evidence that the expatriation empathy of repatriates’ support providers is a more informative characteristic to consider compared with whether they have personal experience of expatriation. In addition, the results suggest that research should also take into account the negative side of social support, and, for example, consider the influence of crossover distress of partners who experience relocation difficulties themselves.

This study points to the possible benefits of organizing social activities or training for repatriates and their partner and any children, as well as the advantages of encouraging expatriates to invite home-country friends to visit.

Although most scholars agree on the importance of support for expatriates’ well-being, the sources of relevant emotional support have received little research attention so far, as has how this influences the repatriation experience.

This study aims to understand the dynamics underpinning the exit and re-entry strategies adopted by multinational enterprises (MNEs) in an emerging market, Pakistan.

This study undertook an in-depth historical case study of Yamaha Motorcycles, which had initially entered Pakistan as a joint venture but had then exited and re-entered as a wholly owned subsidiary.

This study found that, despite its status as a market leader and one of the older players in the Pakistani market, changing market dynamics in the 2000s – especially the increased competition brought by more affordable (inexpensive) Chinese motorcycles and the weak enforcement of industrial policies – had pushed Yamaha Motorcycles to exit. Another factor that had contributed to its exit were differences in risk perception and strategies with its local joint venture partner (a Pakistani business group). Hence, both firm-level and institutional factors had played significant roles in Yamaha’s market exit. This study further found that re-entering in a wholly owned subsidiary operation mode had been beneficial for the firm, as it gained a significant market share due to its focus on innovation and on capturing a market niche, which had earlier not been its main focus. The findings also suggest that opportunity logics and multiple forms of learning can be important for a firm’s re-entry into a host market – such as experiential (i.e. learning from experience) and vicarious learning (i.e. learning from other organizations, including suppliers and competitors) in an emerging market context, in which institutions evolve amid political and policy uncertainty. Finally, this study found that exit and re-entry timing is an important factor for the development of competitive advantage in a host market.

This study is among the few to have investigated the exit and re-entry strategies of MNEs in emerging markets. The relatively short time during which Yamaha Motorcycles had been out of the market had benefited it on its re-entry, as the firm had been able to capitalize on its prior learning and ties to suppliers’ networks.

Going back into previously exited markets is a significant management risk. But, how are re-entry risks managed? By adding strategic reference point (SRP) rationales to the risk management literature, this chapter examines re-entry after initial entry and divestment on a sample of 654 multinational enterprise (MNE) re-entrants. The authors move away from narrow risk management lenses according to which risks happen in isolation and theorize that MNEs simultaneously manage international risk by exploiting the trade-offs among external and internal sources of risk. The authors explain that, for re-entrants, exit may become the SRP for evaluating future strategic choices. The results suggest that re-entrants tend to manage re-entry risk by choosing partner-based modes that enable them to maintain strategic flexibility at re-entry. Surprisingly perhaps, market-specific experience acquired during the initial market foray does not provide strategic flexibility, in that highly experienced firms still experience risk trade-offs.

Current conceptualizations of born‐globals lack a full theoretical explanation of strategic re‐structuring through the use of outward and inward‐oriented activity and the processes of de‐internationalization and re‐internationalization. Strategy and internationalization processes are created by entrepreneurial behaviour. If one wants to understand various international behaviours and strategic changes in firms one needs to focus on entrepreneurs – individual managers. The purpose of this paper is to unify the theoretical framework on born‐globals by addressing two questions. How do managers move through the de‐internationalization (exit) to re‐internationalization (re‐entry) process? How do they choose their patterns of internationalization?

To address these research gaps, this study draws on 26 in‐depth interviews with senior managers across nine Australian born‐globals.

Moving between outward and inward‐oriented activity as they de‐internationalize and re‐internationalize is used as proactive strategic re‐structuring by born‐global managers for survival during periods of global economic decline or changing competitive conditions.

This study provides new theoretical insights where the entrepreneur is central to the internationalization process and provides practical implications for those involved in international business and marketing.

The purpose of this paper is to test the feasibility of utilising an Asset-Based Community Development (ABCD) model in the context of an Alcohol and Other Drug Therapeutic Community, and to use this as a way of assessing how TCs can contribute to the local communities in which they are sited.

This is a qualitative action research project, based on an evolving model in which key stakeholders from participating sites were instrumental in shaping processes and activities, that is a partnership between a research centre, Turning Point in Melbourne, Australia and two Recovery Services operated by the Salvation Army Australia Eastern Territory (TSA). One of these is the Dooralong Transformation Centre on the Central Coast of New South Wales and the other, Fairhaven, is in the Gold Coast hinterland of Queensland, Australia. The project was designed to create “rehabilitation without walls” by building bridges between the treatment centres and the communities they are based in, and improving participation in local community life. This was done through a series of structured workshops that mapped community asset networks and planned further community engagement activities.

Both of the TCs already had strong connections in their local areas including but not restricted to involvement with the mutual aid fellowships. Staff, residents and ex-residents still in contact with the service were strongly committed to community engagement and were able to identify a wide range of connections in the community and to build these around existing Salvation Army connections and networks.

This is a pilot study with limited research findings and no assessment of the generalisability of this method to other settings or TCs.

Both TCs are able to act as “community resources” through which residents and ex-residents are able to give back to their local communities and develop the social and community capital that can prepare them for reintegration and can positively contribute to the experience of living in the local community.

This paper has significant ramifications for how TCs engage with their local communities both as a mechanism for supporting resident re-entry and also to challenge stigma and discrimination.

The paper and project extend the idea of ABCD to a Reciprocal Community Development model in which TCs can act as active participants in their lived communities and by doing so can create a “therapeutic landscape for recovery”.