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The purpose of this paper is to present an approach for continuous acoustic condition monitoring of transformers based on chromatic principles for abstracting information on individual acoustic events as well as secondary trends in the behaviour of the events.

The potential benefits of condition monitoring of high-value transformer equipment are explored, and an approach based on chromatic information abstraction is illustrated and discussed.

Tracking of large numbers of complex and variable individual acoustic events over time using a chromatic approach appears to offer a means for remote operators to evaluate mechanical transformer tap changer condition in a traceable manner.

The condition monitoring is retrofittable and non-intrusive, and the approach may be applied generically for combining condition indicators for overall health-checking. A complex system behaviour may be operationally simplified without discarding the complexity.

This paper describes a method of removing noise from time series data records whilst preserving salient features of short duration, such as sharp transitions and significant peaks. A practical example is drawn from fault‐current testing of circuit breakers, for which the scheme was originally designed. It is demonstrated that the clarity of signal traces can be improved while preserving important transient features. However, the approach is generic and based upon the entropy gradient detection method used in image processing. Local entropy is used as a criterion for selecting the degree of smoothing required, so that features of interest can be preserved. Algorithm modularity allows ready adaptation for specific needs.

Food‐borne infections due to campylobacter, shigella, salmonella and E. coli 0157 have shown a real increase three to four fold. Argues that between the mid‐1980s and 1992 the reasons are multifactorial and include unsafe farming methods, possibly a deterioration in water quality, problems associated with moist food processing and changes in social habitats.

This study aims to investigate the insights of soot formation such as rate of soot coagulation, rate of soot nucleation, rate of soot surface growth and soot surface oxidation in ethylene/hydrogen/nitrogen diffusion jet flame at standard atmospheric conditions, which is very challenging to capture even with highly sophisticated measuring systems such as Laser Induced Incandescence and Planar laser-induced fluorescence. The study also aims to investigate the volume of soot in the flame using soot volume fraction and to understand the global correlation effect in the formation of soot in ethylene/hydrogen/nitrogen diffusion jet flame.

A large eddy simulation (LES) was performed using box filtered subgrid-scale tensor. A filtered and residual component of the governing equations such as continuity, momentum, energy and species are resolved and modeled, respectively. All the filtered and residual components are numerically solved using the ILU method by considering PISO pressure–velocity solver. All the hyperbolic flux uses the QUICK algorithm, and an elliptic flux uses SOU to evaluate face values. In all the cases, Courant–Friedrichs–Lewy (CFL) conditions are maintained unity.

The findings are as follows: soot volume fraction (SVF) as a function of a flame-normalized length for three different Reynolds number configurations (Re = 15,000, Re = 8,000 and Re = 5,000) using LES; soot gas phase and particulate phase insights such as rate of soot nucleation, rate of soot coagulation, rate of soot surface growth and soot surface oxidation for three different Reynolds number configurations (Re = 15,000, Re = 8,000 and Re = 5,000); and soot global correction using total soot volume in the flame volume as a function of Reynolds number and Froude number.

The originality of this study includes the following: coupling LES turbulent model with chemical equilibrium diffusion combustion conjunction with semi-empirical Brookes Moss Hall (BMH) soot model by choosing C6H6 as a soot precursor kinetic pathway; insights of soot formations such as rate of soot nucleation, soot coagulation rate, soot surface growth rate and soot oxidation rate for ethylene/hydrogen/nitrogen co-flow flame; and SVF and its insights study for three inlet fuel port configurations having the three different Reynolds number (Re = 15,000, Re = 8,000 and Re = 5,000).

The Philippines experienced several demographic and socioeconomic changes in the past decades, such as rising urbanization, educational expansion, lengthening life expectancy, and increasing overseas labor migration. These changes will have significant ramifications for families and households. For example, educational expansion may delay union formation and accelerate union dissolution. Meanwhile, the joint effect of declining fertility and increasing life expectancy can lead to population aging, which has important implications for intergenerational support and the provision of care to older adults. Against this backdrop, this chapter aims to sketch a demographic portrait of the Filipino family in the past decades, using different sources, including census and survey data. Specifically, it examines trends in union formation (marriage and cohabitation) and union dissolution (divorce and separation) in the Philippines and explores Filipinos’ attitudes toward these behaviors. It also describes trends in fertility, fertility preference, and childlessness among Filipino women. Finally, it investigates changes (or lack thereof) in household size and structure in the Philippines, including the living arrangements and intergenerational support among older Filipinos.

Although the martial arts industry is rapidly evolving into a mature and highly competitive marketplace, only a few studies have been conducted to understand why people participate in martial arts. The purpose of this study is to examine motivation factors that influence an individual's participation in martial arts to provide leaders of the industry with meaningful managerial implications. The researchers collected data from the 2004 Battle of Columbus Martial Arts World Games IV, one of the most popular martial arts events in the US. The results of a series of MANOVA tests revealed that these martial arts participants (N = 307) are highly motivated by growth-related motivation (e.g. value development and actualisation). In addition, the findings indicate that motivation of martial arts practitioners varies across types of martial arts disciplines, competition orientation and past experiences. Given these results, implications for future research and practice are discussed

We introduce agency and team production theories to explain the international joint venture (IJV) phenomenon. We regard IJV partners as participants in a team production and identified agency conflicts among partners as well as between parents and IJV affi liates. We empirically test the stability of IJVs with such determinants as the existence of monitoring principal, the history of repeated exchanges between partners, the efficiency of mutual monitoring by partners, the effi ciency of affiliate monitoring by parent firms, and the degree of international experience of the partners. The test results show that the existence of monitoring principal and the degree of international experience prove to be significant factors for IJV stability.

Entrepreneurship Education (EE) has received substantial attention, both in the popular press, as well as in academia, owing to the socio-economic impact it holds. However, while the importance of entrepreneurship is universally acknowledged, specific higher-order outcomes EE aim to achieve have not received the same level of attention. This study aims to fill this void by analysing teaching and learning approaches to EE in Africa, as well as the competencies that these EE initiatives aim to build. The study makes use of a qualitative research approach in the form of a systematic review of EE studies conducted in Africa. The systematic review aimed to uncover which approaches and competencies EE initiatives apply. Results indicated that teaching and learning of EE in Africa are mainly focussed on learning for and about entrepreneurship, and to a lesser degree through entrepreneurship. The study therefore proposes the development of higher-order competencies in the form of envisioning and constructing. The study contributes in practice by proposing a shift in the approach to EE by building competencies in the areas of visionary thinking and market expansion, rather than gaining market share. The study also makes a theoretical contribution by critically reviewing teaching and learning approaches on EE and developed competencies, and expands the role that EE can play in market development and opportunity creation.