Search results

The wet-spinning process is very important for the development and production of new lightweight design materials. The washing process is determined as one of the most cost-expensive part of wet spinning. The purpose of this paper is to show the development of a new washing concept. It proposes to increase the washing performance by decreasing fiber-fiber-interfaces during the washing process.

For this purpose, conventional washing concepts are investigated by means of simulations and experiments to obtain process knowledge. Computational fluid dynamics simulation and particle image velocimetry measurements are used to investigate the process.

The overall deficit in conventional washing methods is the large number of fiber-fiber-interfaces, which inhibit the solvent transport out of the compact fiber bundle. Therefore, a new washing concept with included water nozzles is developed. Based on the simulations and observations it is found that the arrangement of the nozzles has direct influence on the fanning of the fiber bundle.

With increased fanning of the fiber bundle a more efficient solvent transport is expected. The developed washing box is a prosperous concept to achieve a higher washing performance during the wet-spinning process. The variable design of the washing box makes it possible to test different nozzle configurations and designs. In this paper the two most promising nozzle arrangements are shown and compared to each other.

This paper aims to describe and evaluate the traditional methods for effective ink removal during the recycling of printed papers. Additionally, novel techniques for dealing with the newer “difficult to deink” inks such as toners from photocopiers, UV‐cured ink films and liquid toner suspensions or Electroinks^® are to be evaluated.

High intensity ultrasound was applied to pulps derived from papers printed with these newer inks in order to evaluate its effectiveness in detaching the inks from paper and establishing the resultant ink particle size distributions.

When exposed to ultrasound at a frequency of 20 kHz, it was found that “difficult to deink” pulps did exhibit significant ink detachment. In the case of toners, temperature did have an effect on particle breakdown with larger numbers of particles produced at temperatures well below the softening point which was attributed to a greater brittleness of the toner at lower temperatures. Electroinks^® can be effectively de‐inked by exposure to ultrasound coupled with washing under neutral conditions. With all the inks investigated, exposure to ultrasound resulted in the detached ink having particle size distributions that can be removed by conventional flotation and washing techniques.

The exposure of the pulp to ultrasound was only carried out using a batch‐wise process. A future development would be to use a continuous flow system incorporating an annular ultrasound horn.

Introducing ultrasound exposure into a conventional deinking plant, all post‐consumer printed waste paper could be deinked without the use of deinking chemicals.

The findings are of interest to those in paper recycling.

Businesses have increasingly been urged to shift their emphasis away from a purely profit-driven economic perspective to a more sustainable approach to growth that holistically captures people, the planet and profits. Indigenous businesses are well suited to creatively integrate sustainability principles within their internal culture. This enables them to cope with the dominance created by non-indigenous enterprises while also promoting long-term business success. The Triple Bottom Line (TBL) concept has been applied to explore how indigenous businesses in Uganda manifest their best practices by incorporating sustainability principles for lasting economic performance. A multiple case study approach was adopted, and three well-established female-owned indigenous businesses were investigated using in-depth interviews. Integrating sustainability in the business is a fulfiling process if done holistically by embracing a range of interdependent variables that include environmental, social and economic dimensions. The author contributes an innovative culturally sensitive sustainability scope that reflects practical insights on how internal sustainability efforts can be streamlined for long-term economic prosperity without compromising the wider social and physical environment.

For individuals and organizations who seek grant money, this guide details major information resources useful to identifying sources of financial sponsorship. It covers grants made by government agencies, by private foundations, and by business and industrial concerns, and should be of interest to persons seeking financial support for organizational or community projects, or individual scholarly endeavors. Excluded from this guide are general materials that review the history of charitable giving, or the role of philanthropy in society, as well as information sources devoted exclusively to scholarships and loans for undergraduate education.

All items listed may be borrowed from the Aslib Library, except those marked *, which may be consulted in the Library.

Today, there is the real possibility that self-management and workplace democracy will follow socialism into the dustbin of history. But the connection of self-management to socialism was misconceived from the beginning. Workplace democracy has its own roots in the historical struggle against slavery and against autocracy. The paper reviews the history of the theory of inalienable rights that applies not only against the self-sale contract and the political contract of subjection but also against of the self-rental or employment contract, today's contract of subjection for the workplace. The paper concludes with the current debate about corporate governance.

The following article describes the development and application of a new shot‐blasting installation which has been specially designed for use on ships' plates. Corrosion of ships' plates has been a major problem for many years, reducing the overall life of the plates and involving heavy expenditure in repairs and maintenance.

The purpose of this paper is to investigate the knowledge existing in the literature on supply chain resilience for identifying the supply chain practices adopted for securing resilience in given uncertain event.

A systematic literature review is conducted to identify 84 conceptual and empirical studies. The research findings are synthesized in categories of uncertain events, supply chain practices and outcomes.

A set of propositions linking the uncertain events, mechanisms and supply chain resilience improvement is developed. It was found that the sufficient conditions for resilience under unexpected disasters are substantially different from those required for resilience against disruptions caused by internal practices or complexity.

Practitioners can benefit from the knowledge of interventions and mechanisms to improve their supply chain resilience in the face of different unpredictable situations. The contribution of this paper is twofold: first, it develops an actionable theory of supply chain resilience by developing testable propositions in the context of supply chains exposed to uncertainties resulting from unexpected disruptions, complexity of supply chains and adoption of certain internal practice; second, the paper highlights the key shortcomings of existing literature and provides opportunities for further research and improvement.

Over the past few decades, university reforms in line with management and enterprise ideals have been well documented. Changes in the ideals underlying the missions of universities have led to changes in their modes of governing and organizing, which in turn drive further transformation of their missions. One set of reforms in Swedish higher education has been the dissolution of collegial bodies and procedures. At the same time, in recent years, we have witnessed an increased interest in collegiality and a reintroduction of collegial bodies and procedures. New translations of collegiality appear not only in how universities are organized, but also in other core aspects of research and higher education. We review examples of peer reviewing, research assessment, and direct recruitment of professors and ask: Can these new translations of collegiality be understood as a revitalization of collegiality, or is it – to draw a parallel with greenwashing – rather a matter of collegiality-washing?

The purpose of this study is to evaluate the knowledge and practices of selected group of Polish children in early school age in terms of issues such as: (1) the principles of food preparation, storage and eating meals; (2) personal hygiene; and (3) basic information about microorganisms.

The auditorium survey method was used. The questionnaire consisted of 15 questions related to the children's knowledge of personal hygiene, the principles of food preparation and storage and the physiology of microorganisms and 13 questions related to the children's personal and food hygiene practice. In total, 169 questionnaires were collected. The study group of children had incomplete knowledge and often reported inappropriate food hygiene practices.

The subjects of food preparation and storage and knowledge of microbes were particular problem areas. By contrast, aspects related to handwashing, the appropriate practices while coughing or sneezing and washing fruit before consumption were positively evaluated. The children demonstrated the most knowledge in the field of personal hygiene. However, a very low percentage of correct answers was noted for the question about handwashing at school. None of the 13 questions related to this practice received more than 90% correct answers. The boys and girls demonstrated a comparable level of knowledge and practice in the area of food safety. It was showed that the place of school influenced answers to a greater extent compared to gender.

The results of the study play an important role in the prevention of food poisoning and are useful for the teachers, staff of training institutions and parents. They can also inspire institutions in countries with a high incidence of food poisoning to search for the causes in the inappropriate hygienic practices of young children.