The fuel most commonly used in conjunction with a wonderbox is paraffin, and in some cases possession of a wonderbox facilitated the transition from firewood to paraffin. There is little doubt that wonderboxes reduce energy consumption, but data on energy savings are inconsistent. It appears, however, that a wonderbox will recover its cost (usually about R12 in 1987) in less than six months.
While users of wonderboxes are appreciative of their fuel‐saving capabilities, the primary motivation in buying a wonderbox is usually convenience, time‐saving and the ability to leave food cooking while away at work. In fact, there were three times as many women in paid employment in the sample of wonderbox users, compared to non‐users.
Wonderboxes are apparently not perceived as being an inferior technology, which is often a problem with appropriate technology. They are rather seen in the context of advancement the transition from subsistence to wage employment, from noncommercial to commercial fuels, from drudgery to time‐saving. In promoting wonderboxes, this perception should be given as much or more emphasis than energy‐saving, and the drab appearance of the box should be changed.
While possession of a wonderbox has sometimes introduced changes in the pattern of food preparation and fuel use, it does not impose an inflexible and unfamiliar domestic regime on the household, which might have made wonderboxes unacceptable.
Many people are unaware of wonderboxes and their advantages, and this lack of knowledge is a constraint on dissemination. However, it is suggested in this report that the most serious constraint is that wonderboxes are unavailable except through a few, mainly non‐commercial, outlets. Two possible solutions to the problem of distribution should be investigated. The first is to make use of existing wholesale and retail networks. The second is the establishment of several small scattered wonderbox‐making enterprises in rural and peri‐urban areas, assisted by a central service organisation. 相似文献
1 t ha ?1 was set, which was nearly achieved using weed control, cutworm and stalk‐borer control, and no fertilizer. A return of 42c to 58c per hour of labour expended was achieved. A yield target of 4 t ha ?1 set for the commercial farming system was not achieved by any of the treatments. For the semi‐commercial farming system (where a small quantity of produce is sold, over and above family requirements) a yield target of
2 t ha ?1was set. This was achieved using weed control, cutworm, and stalkborer con trol, and a fertilization level of 250 kg ha ?1 2:3:2(22) (0,5% Zn) and a topdressing of 100 kg ha ?1 of limestone ammonium nitrate (28% N). A return of 79c to 83c per hour of labour expended was achieved. Further trials will show whether these yield levels occur consistently in the long term. 相似文献
Less than half of the farmers were implementing practices according to proven recommendations. This was related to a lack of knowledge. Most farmers did not realise that all practices were interrelated, resulting in below optimum yields.
Innovativeness was explained by greater farming resources, farming knowledge, contact with information sources and level of education, while yield per ha was also explained by greater farming resources, as well as the presence of the male head of household and contact with extension workers.
Farming populations are not homogeneous relative to farming practices and technology has been developed to suit the more progressive farmers. Future technology transfer strategies should be based on a targeted approach to reach both progressive and low‐access and resource‐poor farmers. 相似文献
Demand will grow as infected adults and children seek care. Most HIV‐related illness is found in people who would not normally require care, and therefore creates additional demand. Demand for care will also be determined by the availability and accessibility of services. Ironically, the middle‐income countries may face higher bills, and in this sense the effect of the HIV epidemic may be worse in the more developed world.
The supply of services will be affected by increased morbidity and mortality among health care workers. This is already happening. The generous terms and conditions of service that most governments offer to workers in the public sector will make the problem worse.
HIV has served to improve the quality of health care in most of the developed world. Patients have sought to take control over their own care, and staff have been more rigorous in taking universal precautions. But in developing countries external aid often determines how health care is organised, and money spent on AIDS is diverted from other areas. This may also be true of local funding.
The effect of HIV on health care is lamentably under‐researched. This is particularly worrying as the effects of HIV will be felt first by the health care sector. The problem must be confronted urgently from the point of view of the suppliers of health care services, the users, and the policy‐makers. 相似文献
Most important is the basic functioning of supply and demand which, in the traditional society, is determined by religion, customs and rules, resulting in a limited choice and volume of consumption, as well as limited production.
Stimulation of the economy can according to community development principles, be brought about by an increase in demand (needs) to serve as motivation for increased production.
Higher production though, necessitates a change in traditional values and the development of abilities and skills. This is primarily the field of community development. 相似文献
It becomes apparent that the independent and self‐governing states have a limited own revenue base and that financial transfers from the RSA Government play an important role. These transfers should, however, not totally be seen as grants, since a large part of them stem from spillover effects that actually obligates the RSA Government to compensate the countries concerned.
One of the main problems is the arbitrary provision of requited transfers (obligations) and unreauited transfers (grants) as aggregate amounts such as the statutory and additional amounts. More use should also be made of conditional or specific purpose transfers. The present financial arrangements are far from optimal and can easily lead to misunderstanding and confusion. 相似文献
In this article the major barriers to system efficiency are identified as being physical and institutional, and they include the physical structure of irrigation schemes, the land tenure system and the marketing structure. A theoretical discussion of each of these factors is used to propose more specific strategies for micro‐level rural development. 相似文献
In scientific practice such a metaperspective requires first of all an inquiry into the appropriateness of the paradigms, theories and models that are used in research and practice. The purpose of this article is to contribute to the vibrant discourse on development and welfare theory by proposing that this discourse is caught in the thought trap of the Newtonian‐Cartesian scientific culture of reductionism, disciplinarity and multidisciplinarity.
The evolution of scientific tradition from classical to Newtonian‐Cartesian is reviewed and also the contrasting societal and developmental implications of changes in this tradition. Tönnies's social transition theory and technological innovation are used to illustrate the need for a synthesis between the classical and modern traditions of science, in particular between the search for wisdom and understanding which dominated classical science and insight and specialised knowledge which regulate progress in modem science.
It is proposed that the social systems approach (the ‘soft’ systems approach) can provide some guidelines for a metaperspective (a grand synthesis) for studies in social welfare and human development The social systems approach is transdisciplinary and its process of synthesis differs fundamentally from the multidisciplinary and interdisciplinary procedures that are often used to provide a synthesis between projects and disciplines in development planning. Its proposed synthesis also differs in important respects from the structure‐functionalist approach ofTalcott Parsons. 相似文献
At the outset, it should be made clear that no special knowledge of the maize marketing system in South Africa is claimed. However, the current debate bears many similarities to that which is currently engulfing agricultural policy observers in Canada and the United States. Agricultural reform and the need to remain competitive in an increasingly open world market is a theme that has thrust itself on policy analysts. In Canada, agricultural economists have engaged in an active professional debate on the merits of supply management and one‐channel marketing systems over the past ten years. Although the strengths and weaknesses of these systems have been well documented from theoretical and conceptual bases, the major impetus for change has come from empirical analysis and the realization that Canada had created an environment which fosters unproductive agricultural sectors, International uncompetitiveness, and food prices that penalize consumers, expecially those in low-income categories. In some cases, prices are so far out of line with the United States that border crossings are deluged on weekends with Canadian shoppers returning home with goods purchased. Food items, expecially those under one-channel supply management marketing systems, figure prominently in the goods brought back to Canada. The system of supply management is in crisis and even the marketing boards have acknowledged that significantly more market orientation is necessary.
Agricultural economists can make a significant contribution to the policy debate in South Africa. Brand is quite right in pointing out that the process will be evolutionary — what is politically unacceptable today may become the policy of tomorrow. The time frame of policy reform fits well into that which is needed to conduct empirical research. But this research must focus on the important issues, even though they may be unpopular. Groenewald makes an important first step in this direction by drawing attention to the issues of productivity and pricing. However, more steps are needed. A critical issue, from my perspective, is the capitalization of benefits from protective agricultural policies. 相似文献
This article explains how non‐formal education, that is organized and systematic education offered outside the framework of the formal education system, could complement formal education, and should be organized to support integrated, community‐based development Briefly discussed guidelines for the planning of non‐formal education are the horizontal and vertical integration of all activities, extensive community involvement, a self‐help approach, the use of front line workers and the maximum utilization of existing facilities. 相似文献
Almost one half of the tribal farmers interviewed favoured private ownership of grazing and arable land. Traditional leaders favoured the reallocation of land to fewer people and the conversion of grazing land into arable land as a solution to the small farm size problem.
Although education levels were similar among both groups of farmers, most private farmers invested in soil conservation whereas the majority of tribalfarmers did not. Crop losses caused by livestock on arable lands (a result of the tribal tenure system) were identified by tribal farmers as the most important factor restricting increased crop production. 相似文献
Making and selling of handiwork and clothing were largely seen as economically worthwhile, while services such as child minding, small‐scale removals, etc, were most often mentioned under the heading ‘worthwhile for other reasons’. Important predictors of the particular choice made were respondents' domicile — metropolitan or non‐metropolitan — the type of home tenure arrangements they had, where they had spent their childhood (rural area, town, etc) and education.
The generally positive views of metropolitan dwellers may indicate high expectations regarding the potential of informal sector activities. Opportunities afforded by, for example, deregulation, more accessible credit advice on and training in business management, etc, could help to meet such expectations. Such opportunities could also promote income generation for those with tenuous or no links with the formal market 相似文献