Kamatchi Subramanian, Neal Vail, Joel Barlow and Harris Marcus
The selective laser sintering (SLS) process is used to prepare test bars from Al2O3/polymer binder powders. Finds that binder‐coated A12O3 particles formed bars that were…
Abstract
The selective laser sintering (SLS) process is used to prepare test bars from Al2O3/polymer binder powders. Finds that binder‐coated A12O3 particles formed bars that were approximately twice as strong as could be formed from mixtures of alumina and polymer binder at the same binder level and processing conditions. In mixed systems, bar strengths increased nearly in proportion to increases in polymer binder content over the 20‐40 per cent volume binder range. Parts made in any particular laser scanning mode showed optimum values for strength and density as the laser energy density was systematically increased from 2‐8cal/cm2. Suggests that optima result from the counteracting influences of energy density on binder fusion and thermal degradation. The optimum energy density is mode or geometry sensitive and shifts to lower values as the laser scanning vector is reduced. Concludes that this behaviour is probably the result of the lower heat losses. Equivalently better utilization of laser energy is associated with the shorter scan vectors. Some of the SLS fabricated bars were infiltrated with colloidal alumina, fired to remove the binder, and sintered at 1,600°C to achieve alumina bars with 50 per cent relative densities, interconnected porosity, and strengths between 2 and 8MPa.
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Neal K. Vail, Badrinarayan Balasubramanian, Joel W. Barlow and Harris L. Marcus
Reports that measurable amounts of polymer degradation occur during the fabrication of objects from polymer coated ceramic powders by selective laser sintering (SLS). Argues that…
Abstract
Reports that measurable amounts of polymer degradation occur during the fabrication of objects from polymer coated ceramic powders by selective laser sintering (SLS). Argues that because the binder is important in achieving strong green parts that can be handled with minimal breakage during post‐processing operations, it is essential to minimize the extent of binder losses. As the first step towards understanding the mechanisms of binder degradation, this paper presents a thermal model of the physical system, noting that the agreement between theory and experiment are good. The model is used to help determine the most influential parameters affecting binder losses during fabrication from polymer coated powders. Predicts that adjustments to laser beam diameter, laser scanning distance and gaseous environment will strongly affect polymer binder degradation during processing. Further predicts correctly that polymer degradation during SLS processing is not sensitive to the inherent degradation kinetics of the polymer.
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1. En guise d’introduction.‐ 2. Droit du tra vail, droit social et (des)ordre international.‐ 3. Droit du tra vail, droit social, légalité et droits sociaux.‐ 4. Droit du…
Abstract
1. En guise d’introduction.‐ 2. Droit du tra vail, droit social et (des)ordre international.‐ 3. Droit du tra vail, droit social, légalité et droits sociaux.‐ 4. Droit du travail, droit social, légalité et correction des inégalités.‐ 5. Quelques mots á propos du rôle du Droit dutravail.‐ 6. Réflexions (supplémentaires) sur le droit du tra vail: les domaines possibles de spéculation théorique et de re cher che appliquée.‐ 7. En matière des orientations générales du droit du travail á l’époque contemporaine. ‐ 8. Le défi de la mondialisation.‐ 9. èour un modèle économique et so cial européen.‐ 10. A propos de Constitution européenne et ..... alentours.‐ 11. Le traitement juridique de la ques tion économique et sociale en Eu rope.‐ 12. Le mythe de la li bre concurrence.‐ 13. Quelques conclusions, pas conclusives.‐
The new European Constitution recognises the function of the role of the social dialogue in the EU context as a key element of the European strategies. But the impression is that…
Abstract
The new European Constitution recognises the function of the role of the social dialogue in the EU context as a key element of the European strategies. But the impression is that the legal outcome contained in the too sober sentences of the European Constitu tion is not coherent with the role gained defacto by social partners today in the national members states and at the EU context. It is still striking the lacking of legal rules to guaranteeing the respect of transnational trade union rights as the right of association and strike. The philosophy promoting collective labour relations at EU level, enshrined in the Constitution, does not find a coherent development in the web of provisions interesting labour law and industrial relations. The language of the social democracy is not increased in all stages of the constitutional itinerary where it would be more appropriate and logic to involve social partners in all fields of their interests: macroeconomy and social policies.
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Xuan V. Tran, Kaleigh McCullough, Makayla Blankenship, Trista Barton, Sophia Cohen, Tabitha Harris, Andrea Lopez, Summer Simone and Trace Bolger
This study aims to create actionable guidelines for pricing decision-making by employing game a theory matrix to forecast the correlation between the average daily rate and the…
Abstract
Purpose
This study aims to create actionable guidelines for pricing decision-making by employing game a theory matrix to forecast the correlation between the average daily rate and the latest ambiance of hotels.
Design/methodology/approach
Utilizing a vector error correction model, the research employs game theory to assess the influence of the average daily rate on the hotel's newest atmosphere during both peak season (April–September) and valley season (October–March).
Findings
Findings indicate that during the peak season, when the average daily rate rises in resorts and falls in suburban areas, the hotel’s newest atmosphere is at its best in both types of accommodations. During the off-peak season, the hotel’s newest atmosphere is achieved when both resorts and suburban accommodations increase their average daily rates.
Research limitations/implications
There are two study constraints. One is the assumption that hotel guests in both parties prefer not to change hotels, but in fact they would. Two is a limited sample of two resort and suburban markets.
Practical implications
This suggests that the hotel’s newest atmosphere can draw both leisure and business travelers to suburban areas during the low season and more leisure travelers to resorts during the high season.
Social implications
The study’s findings have implications for revenue related to the hotel’s newest atmosphere and cleanliness for both suburban and resort hotels, particularly when promoting tourism collaboratively.
Originality/value
The study provides valuable insights for hotel managers in analyzing pricing strategies using matrices.
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Identifies three schools of thought within the broad just‐in‐time(JIT) sourcing literature which are labelled as the“advocate”, “pragmatic” and“sceptic” schools. The former group…
Abstract
Identifies three schools of thought within the broad just‐in‐time (JIT) sourcing literature which are labelled as the “advocate”, “pragmatic” and “sceptic” schools. The former group advocate JIT sourcing as a major competitive weapon, while the latter group suggest that it is less efficient than traditional sourcing techniques. The pragmatic group cite some of the problems associated with sourcing on a JIT basis. The major JIT sourcing practices are identified and the contributions from each school of thought critically reviewed. Reviews the benefits and problems of JIT sourcing as well as the movement of power and responsibilities between members of the supply chain. Concludes by suggesting avenues of future research within JIT sourcing.
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Jennifer Evyonne Simpson, Janet Bardsley, Sharif Haider, Kenneth Bayley, Gill Brown, Amanda Harrington-Vail and Ann Dale-Emberton
The purpose of this paper is to communicate the findings of an empirical research project based on a real world problem that involved the development of a continuous professional…
Abstract
Purpose
The purpose of this paper is to communicate the findings of an empirical research project based on a real world problem that involved the development of a continuous professional development (CPD) framework for a children’s integrated service workforce. In addition, to give attention to the notion that children’s integrated services have not necessarily been viewed from the perspective of conflict management and that this has meant ensuing conflicts that characterise such organisations are more often than not ignored.
Design/methodology/approach
A case study approach involving a mixed methodology consisting of semi-structured interviews for senior managers and service leads; a quantitative survey for frontline practitioners and focus groups for service users, carers and children.
Findings
Rather than the service being fully integrated, services were aligned, and this was reflected in the conflict between professional cultures, reinforcing an “us and them” culture. This culture had seemingly permeated all aspects of the organisation including the senior management team. It was also noted that certain systems and processes, as well as bureaucracy, within the service were seen as hindering integrated working and was in effect a catalyst for conflict.
Research limitations/implications
What has become evident during the course of this empirical study is the need to further explore the functioning of children’s integrated services using conflict management theories, tools and techniques so as to understand how best to manage conflict to an optimum where an environment of creativity and productiveness is created.
Practical implications
Therefore, when devising a CPD framework it can be argued that there is a need to address some of the types of conflict at the micro-frontline practitioner level of the organisation, as it is this level where there is opportunity through a variety of mechanisms, for example formal and non-formal learning, ring-fenced time, attendance at conferences, team away days and shadowing opportunities can be used to achieve a greater understanding of professional roles, improve working relationships and engage in the division of tasks in a fashion that will promote collaborative working.
Social implications
The extent to which a children’s integrated service can be the harbinger of a range of multi-faceted conflicts that include the jarring of professional cultures, task conflict, inter-personal incompatibilities and competing value bases cannot be underestimated. Therefore, when devising a CPD framework it can be argued that there is a need to address some of the types of conflict at the micro-frontline practitioner level of the organisation.
Originality/value
Through the application of conflict management theory it will be illustrated how conflict could be used to effectively steer children integrated services towards creativity and productivity through an organisational wide framework that not only embraces dissonance, but also promotes a learning environment that takes advantage of such dissonance to incorporate a hybrid of professional practice and expertise.
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Physical education, like most areas of education, is changing and taking on a new look for the 1980s. Physical educators, school administrators, and others making decisions about…
Abstract
Physical education, like most areas of education, is changing and taking on a new look for the 1980s. Physical educators, school administrators, and others making decisions about programs for children and young people are examining both current practices and forecasts for the future in this field. What they decide will profoundly affect the resources that should be a part of library collections for children and youth. Too often librarians and school media specialists have found it difficult to think about the kinds of materials appropriate for such collections because they do not have the knowledge necessary for sound selection. A major reason for this difficulty is that the area of physical education is usually separated from other subject areas in schools. Along with the industrial arts, domestic science, and the fine arts, physical education is categorized as a performative subject area. Classified as such, it is usually not thought of as something you ask young people to think about, talk about, or even read about; but rather, something you ask them to “do.” Yet, upon closer examination, there exists a small wealth of library materials for children.