Eiffel assertions and the external structure of classes and objects

The “external structure” in an object oriented system refers here to the  graphs of objects and classes. The class structure graph or class model is derived from the object structure graph or object model, and in this operation structural information is lost, or never made explicit. Although object oriented programming languages capture the class model as declarations,  contradictory assumptions about object model properties may be made introducing faults into the design. Consistent assumptions about the object model can be specified in the code using assertions such as Eiffel’s  invariants, preconditions and postconditions. Three examples specifying the external structure are considered.

Comparing external and internal dorsal-spine bands to interpret the age and growth of the giant lantern shark, Etmopterus baxteri (Squaliformes: Etmopteridae)

The giant lantern shark, Etmopterus baxteri, is taken as bycatch of commercial fisheries that operate in deepwater off southeastern Australia. Bands on the second dorsal spine were used to obtain age estimates. The number of bands on the external surface of the spine and within the inner dentine layer increased with animal length. Most spines had more bands on the external surface, and the rate of band formation was significantly different between the external surface and the inner dentine layer. Females had a maximum of 57 external bands and 26 internal bands, while males had up to 48 external bands and 22 internal bands. Age estimates from external bands suggest maturity (A ₅₀) at 20 years for males and 30 years for females. Internal band age estimates suggest maturity at 10.5 years for males and 11.5 years for females. Although there is a large discrepancy between these two preliminary (i.e., unvalidated) age estimates, they both suggest that E. baxteri is a long-lived and late maturing species that is likely to be susceptible to over fishing.

Applying external solutions to organizational development : elearning as a platform for internal growth

Innovations in technology have facilitated eLearning process development, bringing significant impact into education. eLearning is not simply putting study materials online on the Web, nor is it a substitute for traditional classroom teaching (KPMG, 2002). Businesses worldwide have been using eLearning as a facilitator in organisational development through knowledge sharing, especially in the area of web based training and project management. eLearning has also become a large area of potential business for many organisations. In this study, we explore how eLearning has helped an organisation based in India – Tata Interactive Systems (part of TATA conglomerate), which provides eLearning solutions for businesses locally and globally. In this single case study, we explored how the organisation has not only utilised eLearning as an internal development process, but also successfully converted this learning into business opportunities for itself. To study the development process, we have applied the process theories of Van De Ven and Poole (1995).

Emotional turmoil at the Bauhaus : problems of internal and external legitimacy : an historical case study

Walter Gropius established the Bauhaus in Germany in 1919. The organization established one of the most important design movements of the twentieth century. The organization had a very brief existence and was fraught with disruptions and emotional turmoil. Despite the difficulties, Gropius managed to keep the organization alive long enough for its extraordinary creativity to be harnessed and developed. The organization closed in 1933, but by that time its legitimacy as a source of design and pedagogy was assured. Organizational survival is often dependent on government subsidies, support through sales, donations or sponsorships. A factor in attracting this support is the perceived legitimacy of the organisation. Legitimacy is defined as a degree of consensus that the meanings and behavior of an organisation are valid and desirable by society in
general. Legitimacy remains an undeveloped concept. This paper reviews relevant theories of legitimacy, considers the role of emotions in shaping legitimacy and the emotions evoked as legitimacy is negotiated by internal and external stakeholders. A historical case study of the Bauhaus provides the backdrop for portraying the focal role emotions can play in institutionalization. The paper concludes with a discussion of the lessons of legitimacy available to contemporary cultural organisations.

Discovering frequent sets from data streams with CPU constraint

Data streams are usually generated in an online fashion characterized by huge volume, rapid unpredictable rates, and fast changing data characteristics. It has been hence recognized that mining over streaming data requires the problem of limited computational resources to be adequately addressed. Since the arrival rate of data streams can significantly increase and exceed the CPU capacity, the machinery must adapt to this change to guarantee the timeliness of the results. We present an online algorithm to approximate a set of frequent patterns from a sliding window over the underlying data stream - given apriori CPU capacity. The algorithm automatically detects overload situations and can adaptively shed unprocessed data to guarantee the timely results. We theoretically prove, using probabilistic and deterministic techniques, that the error on the output results is bounded within a pre-specified threshold. The empirical results on various datasets also confirmed the feasiblity of our proposal.

Temporal constraint satisfaction in matrix method

Constraint satisfaction is a challenging problem in Interval Algebra (IA). So there are many efforts to attack this problem. After building a matrix method to deal with temporal reasoning problems, we develop basic techniques for applying the matrix method to constraint satisfaction in this paper. Thus, the propagating rules and the algorithms of 3- and path-consistency are studied. If our matrix method is used, then the temporal constraint satisfaction problem can be transformed into a problem that can be effectively solved.

Public sector ethics in Sweden : a 4P-model of internal and external determinants in codes of ethics

This article summarizes and aggregates the results of a study conducted of the largest 100 public sector organizations derived from three categories in Sweden. These categories of organizations comprise 40 entities of government, 40 municipalities, and 20 county councils. The objective was to describe the determinants of codes of ethics in Swedish public sector organizations. This research reports on the responses of 27 organizations that possessed a code of ethics. The principal contribution is a 4P-model of seven internal and external determinants in public sector codes of ethics. The identified determinants relate to four principal sectors of a society, namely: public community sector, private corporate sector, private citizen sector, and political/policy conduct sector.

External breast prosthesis use: experiences and views of women with breast cancer, breast care nurses, and prosthesis fitters

After mastectomy, the provision of an appropriate breast prosthesis can help to improve body image and quality of life and reduce associated emotional distress. Although up to 90% of women use an external breast prosthesis after mastectomy, little is known about their experiences and satisfaction with breast prosthesis use. Focus groups were conducted with women who had been fitted with an external breast prosthesis, breast care nurses, and prosthesis fitters to explore women's experiences of prosthesis use. Qualitative thematic content analysis of focus group transcripts indicated that whereas women's initial reaction to the prosthesis generally was negative, this improved over time. Provision of adequate information and support, characteristics of the fitter and the fitting experience, and relationships with breast care nurses and prosthesis fitters were important to women's acceptance and satisfaction with their prosthesis. The study results highlighted the key role that breast care nurses play and the underestimation of the prosthesis fitter's role. Common themes concerning the impact of prosthesis use included body image, appearance, and feminine identity. These findings have important implications for professionals involved in the delivery of breast prostheses services.

External monitoring, managerial ownership and form performance in Malaysian capital market: a GMM based panel data approach

This study re-examines whether the structure of share ownership by both directors and institutional ownership provides explanation for firm performances. These relationships are modelled and estimated using GMM based dynamic panel data over a period from 1997 to 2001 with a sample of 100 CI components companies listed on Main Board of Malaysia. The findings provide strong evidence of simultaneity between firm performance and managerial ownership. Although an insignificant relationship between firm performance and institutional ownership is~ observed, the institutional holdings provide strong substitute for managerial ownership with a strong negative relationship between managerial ownership and institutional ownership. This is in line with the managerial incentive hypothesis, which suggests that manager's share in the firm's ownership leads to better performance and the monitoring substitute hypothesis, which suggests that managerial ownership could be effectively replaced by institutional ownership.

Have US external imbalances been determined at home or abroad?

This paper examines the relationship between the United States saving–investment imbalance and long-term real interest rates using a new international borrowing and lending framework. It first establishes how domestic or international factors may primarily influence the US external imbalance and interest rates over any given time before showing that the current account and real long term interest rate share a positive and statistically significant co-integrating relationship based on data from the mid-1980's. The results suggest that while in the pre-Asian financial crisis period (1985:01–1996:04) US external deficits and long term interest rates were mainly determined by domestic factors, external factors beyond the control of domestic policymakers dominated from 1997:01–2004:04.