Much has been written about the chinampas of central Mexico. One of the commonly repeated themes is that these wetland fields were self-irrigated from below in a process known as sub-irrigation. According to this model, water infiltrates the planting platforms from adjacent canals and then rises to the root zone by capillary action. Thus, chinampas are thought to have needed little supplemental irrigation, and produced dependable and high yields. Here I report the results of field and lab studies (...) of soils of 10 chinampas in the region east of Xochimilco, in the Mexican Federal District. These interpretations are combined with discussion of maize rooting tendencies, regional rainfall patterns, and the presence of willow tree roots in chinampa soils. I also consider whether farmers strive to create and maintain optimum field morphologies for subirrigation when faced with both flood and drought risk, and when manual irrigation is aready option. I conclude that while sub-irrigation is possible under certain combinations of field morphology, crop type, and soil properties, it was a relatively minor factor in the overall decision-making process of past chinampa farmers, and should not be a major determinant of future planning for chinampa preservation or reconstruction. Furthermore, sub-irrigation must be modeled carefully in relation to soil properties, croptypes, and seasonality if it is to beconsidered a significant function of wetland fields in any context. (shrink)

This article concerns the so-called irrigation system in the Timaeus’ biology (77a-81e), which replenishes our body’s tissues with resources from food delivered as blood. I argue that this system functions mainly by the natural like-to-like motion of the elements and that the circulation of blood is an important case study of Plato’s physics. We are forced to revise the view that the elements attract their like. Instead, similar elements merely tend to coalesce with each other in virtue of their (...) tactile features as the atomists describe. The notion of attraction is replaced with this notion of mere coalescence. I begin by outlining how blood is made from food. I then argue that an understanding of health and disease compels us to read Plato as if he were an atomist and to abandon the popular scholarly interpretations according to which the elements attract each other. (shrink)

Dujiangyan irrigation system of more than 2000 years history is a symbol of originality of Chinese ancestors both in its conception and project mode. It is still working well and benefit Chengdu Plain nowadays while other comparable water conservancy projects of the same or later age have vanished and been forgotten. More than just a world-famous cultural heritage, it shows the harmonious relationship between man and nature. And it also reveals us how to solve problems in the era of (...) economic globalization, such as the constantly silt up of the dams, the exhaustion of the energy and the crisis of the deterioration of ecosystem. The inspirations it gives us range from technology to humanities, from economy to various aspects in social life. In a word, Dujiangyan irrigation system demonstrates the wisdom and creativity of Chinese people and has a universal significance despite the change of time and space. (shrink)

Irrigation systems are recognized as common pool resources supplying water for agricultural production, but their role in supplying water for other uses is often overlooked. The importance of non-agricultural uses of irrigation water in livelihood strategies has implications for irrigation management and water rights, especially as increasing scarcity challenges existing water allocation mechanisms. This paper examines the multiple uses of water in the Kirindi Oya irrigation system in Sri Lanka, who the users are, and implications for (...) water rights and management policies. There are important residential, gender, and class differences among the water users. People use irrigation system water not only for field crops, but also for fishing, homestead gardens, and livestock. Even within irrigated farming households, men have more control over paddy crops in the main fields, whereas homestead gardens are women's domain. Because the irrigation system provides water for birds and animals, even wildlife and non-resident environmental groups can be considered stakeholders. Current policies emphasize user involvement in both irrigation and domestic water supply. While government agencies have had primary responsibility, institutions such as Farmers' Organizations are being promoted. These have the potential to serve as user platforms for negotiating water allocation among irrigated farmers. However, the user organizations reflect the sectoral responsibility of the government agencies. Their membership and structure do not take into account the multiple uses or users of water. Developing platforms that accommodate different user groups remains a major challenge for improving the overall productivity, as well as equity, of water use. (shrink)

Smart parsimonious and economical ways of irrigation have build up to fulfill the sweet water requirements for the habitants of this world. In other words, water consumption should be frugal enough to save restricted sweet water resources. The major portion of water was wasted due to incompetent ways of irrigation. We utilized a smart approach professionally capable of using ontology to make 50% of the decision, and the other 50% of the decision relies on the sensor data values. (...) The decision from the ontology and the sensor values collectively become the source of the final decision which is the result of a machine learning algorithm. Moreover, an edge server is introduced between the main IoT server and the GSM module. This method will not only avoid the overburden of the IoT server for data processing but also reduce the latency rate. This approach connects Internet of Things with a network of sensors to resourcefully trace all the data, analyze the data at the edge server, transfer only some particular data to the main IoT server to predict the watering requirements for a field of crops, and display the result by using an android application edge. (shrink)

There is in much of contemporary irrigation development a large paradox. Irrigation development, while contributing to productivity, frequently thwarts social justice—it either introduces incipient inequalities in access or it reinforces those that exist. More progressive irrigation development policies are being developed and tested in several countries. These new approaches give more attention to the role of local groups in governing irrigation systems while reducing the heavy-handed involvement of state agencies. These new approaches are seen as both (...) consistent with achieving greater fairness in irrigation development as well as with the new fiscal realities of governments nearly everywhere. Supporting these new approaches are a set of institutions and individuals with nonengineering expertise who traditionally have not been defined as central to irrigation development. (shrink)

This paper is not a critique of waterpolicies, or an advocacy of alternatives, but rathersuggests a shift of emphasis in the ways in whichgender analysis is applied to water, development, andenvironmental issues. It argues that feministpolitical ecology provides a generally strongerframework for understanding these issues thanecofeminism, but cautions against a reversion tomaterialist approaches in reactions to ecofeminismthat, like ecofeminism, can be static and ignore theagency of women and men. The paper draws attention tothe subjectivities of women and their embodiedlivelihoods as (...) a more useful approach to understandingthe ways in which women relate to water in bothirrigated agriculture and domestic provisioning. (shrink)

Indigenous irrigation systems have been a central feature of Asian agriculture since prehistoric times, and reflect technical knowledge with a proven record of sustainability. Modern agricultural development efforts often ignore this indigenous knowledge, replacing traditional infrastructure with new construction, and replacing indigenous management arrangements with state bureaucracies. For reasons of environmental conservation as well as institutional stability, indigenous irrigation systems should be intelligently assisted, rather than mindlessly replaced.

In the Sheeb area in eastern Eritrea a Participatory Rural Appraisal(PRA) was carried out in two villages, one upstream and one downstreamof the ephemeral rivers Laba and Mai-ule. The objectives of the studywere to obtain a better understanding of farmer-managed spate irrigationsystems and to enable the local people to perform their own farmingsystem analysis. This paper describes the various PRA activities, suchas mapping, diagramming and ranking of problems, that were undertakenwith the participation of local people. The resource mapping revealedthat lack (...) of water and not scarcity of land is the main constraintaffecting the development of the spate irrigation system in the Sheebarea. When there is a lack of rainfall in the highlands of Eritrea,there are only few floods per year in the Sheeb area. The developmenttrend diagrams showed that the number of floods, the food production andthe prevalence of pests vary considerably over time. The livelihooddiagrams indicated that food, fodder, and water were only availableduring part of the year. In search of these resources, the farmers havedeveloped a livelihood strategy of seasonal migration to the highlandsof Eritrea. The PRA data collected in the two villages appeared to bevery useful for the preparation of community action plans in the entireSheeb area. (shrink)

Diverse agricultural technologies are promoted to increase yields and incomes, save time, improve food and nutritional security, and even empower women. Yet a gender gap in technology adoption remains for many agricultural technologies, even for those that are promoted for women. This paper complements the literature on gender and technology adoption, which largely focuses on reasons for low rates of female technology adoption, by shifting attention to what happens within a household after it adopts a technology. Understanding the expected benefits (...) and costs of adoption, from the perspective of women users in households with adult males, can help explain observed technology adoption rates and why technology adoption is often not sustained in the longer term. Drawing on qualitative data from Ethiopia, Ghana, and Tanzania, this paper develops a framework for examining the intrahousehold distribution of benefits from technology adoption, focusing on small-scale irrigation technologies. The framework contributes to the conceptual and empirical exploration of joint control over technology by men and women in the same household. Efforts to promote technology adoption for agricultural development and women’s empowerment would benefit from an understanding of intrahousehold control over technology to avoid interpreting technology adoption as an end in and of itself. (shrink)

Instead of technological policyprescriptions, the search for solutions to managementproblems in irrigation systems is increasingly soughtin organizational and institutional reforms. Thereseems to be an emerging consensus that water and moneysavings can be brought about by (1) treating water asan economic good; and (2) decentralizing themanagement of irrigation water. Policies based on thisconsensus are being implemented in a large number ofcountries. On the basis of insights derived fromfeminist economics, the paper identifies and discussesgender biases of new irrigation management (...) policies.The paper shows that policies do not explicitlyconsider the possibility that women are water users,and are implicitly based on a belief that all usersare equally able to pay for water. Calculations aboutexpected increases in efficiency may be wrong, becausethey do not take women‘s unpaid contributions tothe economy into account. Existing evidence about theimpacts of irrigation programs shows that these haveprovoked changes in the costs of irrigation or users,in water use practices, and in the accountabilitybetween users and providers of water. No empiricalinformation exists to ascertain whether these changesare gender specific. Impact studies do not addressgender concerns, and methods employed in impactstudies do not allow a critical re-assessment of thetheories underlying new irrigation policies. Thisreinforces the idea that gender or women do not matterand seriously limits the understanding of thedeterminants of irrigation management performance. (shrink)

Precision agriculture is a breakthrough in digital farming technology, which facilitates the application of precise and exact amount of input level of water and fertilizer to the crop at the required time for increasing the yield. Since agriculture relies on direct rainfall than irrigation and the prediction of rainfall date is easily available from web source, the integration of rainfall prediction with precision agriculture helps to regulate the water consumption in farms. In this work, an edge computing model is (...) developed for predicting soil moisture in real time and managing the water usage in accordance with rain prediction. A soil moisture prediction hybrid algorithm has been developed that revolves around the decision-making techniques with live environmental parameters including weather parameters for the prediction of soil moisture through the impact of precipitation. Numerous algorithms with the combination of regression + clustering are estimated, and it is inferred that XGBoost + k-means outperforms other algorithmic combinations that is deployed in edge model. This model is used as an intermediary between the end IoT devices and cloud that results in the saving of computationally intensive processing performed on cloud servers. The servers located on a local edge network perform the developed algorithmic computations. Avoiding transmission over the cloud results in significant latency, response time, and computation power savings and therefore increases the efficiency of data transfer. The proposed edge computing model is implemented in Raspberry Pi as an edge, Heroku as cloud, and edge nodes as the combination of Pi with actuators and sensors. The monitored data from Pi are stored in MongoDB webserver that is controlled by Web dashboard. Finally, the developed model is implemented in cloud and edge where the edge server implementation performs better in terms of latency, bandwidth, throughput, response time, and CPU memory usage. (shrink)

Governmental and non-governmentalagencies worldwide have devoted considerablefinancial, technical, and organizational efforts toconstruct or rehabilitate irrigation infrastructure inthe last three decades. Although rural povertyalleviation was often one of their aims, evidenceshows that rights to irrigated land and water wererarely vested in poor men, and even less in poorwomen. In spite of the strong role of irrigationagencies in vesting rights to irrigated land and waterin some people and not in others, the importance ofagencies‘ targeting practices is still ignored.This article disentangles how (...) public irrigationagencies either included or excluded women and mensmallholders as right holders to irrigated land andwater. This is done on the basis of significant casestudies from Africa, Asia, and Latin America thatpoint in both positive and negative directions. Thegeneral conclusions are the following. Rights toirrigated land are related to the site-selection andphysical design of land-bound irrigationinfrastructure. These rights are vested in the pooreither by implementing a localized land reform or bydirectly selecting poor people‘s land forimprovement. Among all potential land users in aselected site, water rights have to be defined. Thepoor are included as title holders if water rights arevested in land users rather than land owners, and inboth women and men, rather than in male householdheads. A common condition to get water rights is thatone has to participate in construction investments.Agencies need, firstly, to open up this condition forthe poor, also for women, and, secondly, ensure thatpoor people‘s investments are linked to rights.Parallel to vesting land and water rights, externalagencies influence the composition of the local forumsin which decisions on land and water rights arerefined, endorsed, and implemented, and they influencethe order in which project activities are planned andundertaken. Early inclusion of the poor in theseforums and crystallization of expropriation andallocation criteria and procedures before constructionstarts are pivotal for poverty alleviation. (shrink)

Women’s empowerment is often an important goal of development interventions. This paper explores local perceptions of empowerment in the Upper East Region of Ghana and the pathways through which small-scale irrigation intervention targeted to men and women farmers contributes to women’s empowerment. Using qualitative data collected with 144 farmers and traders through 28 individual interviews and 16 focus group discussions, this paper innovates a framework to integrate the linkages between small-scale irrigation and three dimensions of women’s empowerment: resources, (...) agency, and achievements. The relationship between the components of empowerment and small-scale irrigation are placed within a larger context of social change underlying these relationships. This shows that many women face serious constraints to participating in and benefitting from small-scale irrigation, including difficulties accessing land and water and gender norms that limit women’s ability to control farm assets. Despite these constraints, many women do benefit from participating in irrigated farming activities leading to an increase in their agency and well-being achievements. For some women, these benefits are indirect—these women allocate their time to more preferred activities when the household gains access to modern irrigation technology. The result is a new approach to understanding women’s empowerment in relation to irrigation technology. (shrink)

This article describes and analyses the development of modern irrigation in Java within the context of the establishment and transformation of the colonial state in the Dutch East Indies / Indonesia. In order to make this relationship comprehensible the concept “large technical system” has been adopted. The colonial socio-technical irrigation system was built between 1830 and 1942. Engineers, civil servants and agricultural experts were the main system builders and they formed specific coalitions practising specific irrigation approaches. After (...) Indonesia gained its independence, the colonial irrigation system remained in existence and, consequently, irrigation engineering remained top-down, large-scale and focused on agricultural-technical management. (shrink)

As climate change in West Africa poses profound limitations on rainfed agriculture, policymakers and practitioners may again turn to irrigated agriculture to provide food for a growing population. Gendered analyses of irrigation projects reveal that in many cases women’s participation in irrigated agriculture has been limited due to a lack of access to land and water. Past research in the Upper Valley of the Senegal River suggests that variables other than access to land and water condition women’s participation in (...) irrigated agriculture. Fully understanding women’s participation in irrigated agriculture demands examination of intra-household dynamics and livelihood strategies as well as the impacts of agricultural commodification. (shrink)

Water saving irrigation is promoted as a strategy to mitigate future water stresses by the Chinese government and irrigation scientists. However, the dissemination of WSI in China has been slow and little is understood with respect to why farmers adopt WSI or how WSI interacts with the social and institutional contexts in which it is embedded. By analyzing qualitative data from 37 semi-structured and 56 unstructured interviews across 13 villages in northwest China, this paper examines smallholder farmers’ knowledge (...) and perceptions of WSI, and how WSI interacts with farmer livelihood decision-making and extant systems of land and water management. The results show that smallholders’ willingness to adopt and continuously use WSI was dampened by a lack of communal capital and measures for conflict resolution, a disconnect between the temporal demands of practicing WSI and the ways farmers prioritize different livelihood strategies, misconceptions about WSI systems and how they work, market risks, and landownership structure and economies of scale. These results suggest that programs for promoting WSI must be holistic in nature and address smallholders’ day-to-day problems. Understanding why WSI did not succeed in some places will help formulate policy interventions that avoid reproducing conflicts, risks, and technological malfunctions responsible for previous failure. (shrink)

This paper discusses the significance of gender-based conflicts for thefailure of Gambian irrigated rice projects. In particular, it illustrateshow resource control of a gendered crop, rice, shifts from females to maleswith the development of pump-irrigated rice projects. Irrigation imposes aradically different labor regime on household producers, demanding thatthey intensify labor for year-round cultivation. Yet, the Gambian farmingsystem evolved for a five month agricultural calendar, in which women wereaccorded specific land and labor rights. The need to restructure familylabor, specifically skilled (...) female labor, to meet the cultivation demandsof pump irrigation is crucial for understanding the pattern of gender-basedconflicts in Gambian rice schemes. The case study illustrates thatirrigation involves more than technology transfer. Appropriate irrigationdemands sensitivity to the social structure of household production systems. The paper concludes by emphasizing the centrality of gender issuesfor improving food security in sub-Saharan Africa. (shrink)

Halfway through the 20thcentury, a curious shift took place in theconcept and definition of the agronomic term“crop water requirements.” Where these cropneeds were originally seen as the amount ofwater required for obtaining a certain yieldlevel, in the second half of the 20thcentury, the term came to mean the water neededto reach the potential or maximum yield in acertain season and locality. Some of themultiple academic, economic, social, andgeopolitical aspects of this conceptual shiftare addressed here. The crucial role of theproduction ecologist (...) Cees de Wit in formulatingthis paradigmatic shift in the 1950s isdiscussed. It is seen how the incipient concernfor an expected global scarcity of waterresources has contributed to a trend back tothe conservative view of crop water control ofde Wit. The development over the years ofengineering and agricultural science conceptsconcerning irrigation and crop water control ispresented as an evolution from practicalhusbandry to specialized applied science;from an empirical, ecological approach to amainly physical/mathematical discipline. Inthe section ``The scientific heritage of Occamand Bacon,'' it is argued that this developmentregarding irrigation is part of a general trendin agricultural (and other) sciences andtechnologies over the last 150 years, althoughtendencies to return to a more holisticapproach have, at times, occurred. The current mainstream concepts and methodsin the art and science of crop water control,far from being objective and value-free, oftenact as ``a siren song'' for decision-makersresponsible for daily irrigation practice andregional or global water resource management.The seductive ``tune'' of maximum yields,concurrently the highest crop water use, drownsout the more modest aim of making anefficient use of the available waterresources. The latter's allure might,however, become the morecompelling as a greater scarcity ofphysical water resources becomes moreimportant than scarcity of land and labor. (shrink)

A case study of growers conception of irrigation strategies indicates that pot plant growers in Scandinavia base their management approaches on experientially based art. The study also indicates that there is a gap between experientially based art and available greenhouse technology. In order to standardize production and produce quality, both the grower’s experience and available technology should be taken into account. In order to achieve this, the present study proposes to arrange reflection on reflection in action with a group (...) of growers by means of the dialogue seminar method. The concept of reflection on reflection in action is novel to horticultural practice. Therefore, we suggest future inter- and multidisciplinary research within this domain. (shrink)

Rural development policies are often inspired by narratives that are difficult to challenge because they are based on an apparently obvious and coherent reading of reality. Research may confront such narratives and trigger debates outside the academic community, but this can have a feedback effect and lead to a simplistic or biased posture in research. This article analyzes a research-based initiative that questioned a commonly held narrative in large-scale irrigation schemes in Morocco concerning the structural weaknesses of farmer-led collective (...) action. This initiative conceived an alternative narrative of farmer-led collective action, based on research and actions undertaken in collaboration with the farmers. The article assesses to what extent it was possible to design this narrative and to draw on it to orient research activities, actions with farmers and public engagement, without impairing the quality of the research process. The alternative narrative was designed and diffused based on three intertwined activities: (1) the identification and analysis of farmer-led collective actions, (2) the diffusion of information on successful farmer-led collective actions especially through the production of videos, and (3) exchanges with and between local farmers’ organizations. The alternative narrative that resulted from these activities emphasizes the potentialities of farmer-led collective action, and more broadly, the willingness and capabilities of many family farmers to play an active role in the governance of rural areas. The message of the alternative narrative and the distinction made between the research articles and videos in both their content and role ensured that research did not fall into simplistic or biased analyses. The alternative narrative also became a key to renewed relations between farmers and researchers and helped design training for students that pay more attention to local dynamics. In a situation in which scheme-level organizations show limited interest in reflexive enquiry, this initiative proposes some stepping stones to make it possible for changing narratives to accompany changing relations between actors. (shrink)

This paper examines the occurrence and impact of gender discrimination in access to production resources on the income, productivity, and technical efficiency of farmers. Through an empirical investigation of farmers from Koussin-Lélé, a semi-collective irrigated rice scheme in central Benin, we find that female rice farmers are particularly discriminated against with regard to scheme membership and access to land and equipment, resulting in significant negative impacts on their productivity and income. Although women have lower productivity, they are as technically efficient (...) as men. The findings suggest that there is considerable scope for improving the productivity of women through increasing their access to production resources. (shrink)

In many countries and resource sectors, the state is devolving responsibility for natural resource management responsibility to ``communities'' or local user groups. However, both policymakers and researchers in this area have tended to ignore the implications of gender and other forms of intra-community power differences for the effectiveness and equity of natural resource management. In the irrigation sector, despite the rhetoric on women's participation, a review of evidence from South Asia shows that organizations often exclude women through formal or (...) informal membership rules and practices. Women may have other ways to obtain irrigation services, but even if they are effective, these other informal ways of obtaining irrigation services are typically less secure. As resource management – and rights to resources – are transferred from the state to local organizations, ensuring women's participation is essential for gender equity in control over resources. Greater involvement of women can also strengthen the effectiveness of local organizations by improving women's compliance with rules and maintenance contributions. Further detailed and comparative research is required to identify the major factors that affect women's participation and control over resources, if devolution policies are to be both equitable and sustainable. (shrink)

To illuminate the problems and perspectives of water management in Iran and comparable (semi-) arid Middle East and North Africa (MENA) countries, three paradigms can be distinguished: the traditional, the industrial and the reflexive paradigm. Each paradigm is characterised by its key technical system, its main social institution and its ethico-religious framework. Iran seems to be in a state of transition from the 'hydraulic mission' of industrial modernity to a more reflexive approach to water management. This article sketches the contours (...) of the emerging paradigm: a complementary system of traditional and modern methods of water provision, a participatory water resources management and a 'post-mechanistic' ethico-religious framework. (shrink)

Science provides us with representations of atoms, elementary particles, polymers, populations, genetic trees, economies, rational decisions, aeroplanes, earthquakes, forest fires, irrigation systems, and the world’s climate. It's through these representations that we learn about the world. This entry explores various different accounts of scientific representation, with a particular focus on how scientific models represent their target systems. As philosophers of science are increasingly acknowledging the importance, if not the primacy, of scientific models as representational units of science, it's important (...) to stress that how they represent plays a fundamental role in how we are to answer other questions in the philosophy of science (e.g. the scientific realism debate). This entry begins by disentangling ‘the’ problem of scientific representation, before critically evaluating the current options available in the literature. (shrink)

A major programme of irrigated rice extension in the Middle Senegal River Valley has further limited the river’s natural flooding in the floodplain (Waalo), initially reduced by drought. We conducted a transdisciplinary (TD) and gendered study in the region to explore links between agricultural biodiversity and family diets using a social analysis of women’s practices. The results showed how rice expansion impacts local agrobiodiversity, diet quality and the cultural way of life. Disappearance of the singular agropastoral and fishing system of (...) the Senegal River Valley is profoundly modifying the landscape, limiting wooded riverine settings, and is undermining the traditional diversified flood-recession cropping system in the Waalo. This is causing an overconsumption of rice by reducing alternative food sources, such as sorghum, vegetables and animal products (fish, milk and meat). In particular, flood-recession sorghums are in danger of disappearing, yet they are more nutritious than rice and now sell for twice as much, or more. The way of life is being disrupted, notably sociabilities previously based on territorial complementarities, and women are disadvantaged in terms of recognition and added workload. Women’s groups have launched collective irrigated gardens, organic or not, only supported by the local NGO, but any surplus is hardly ever sold on the weekly markets in the neighbourhood. Moreover, this diet imbalance increases nutritional risk factors for health, such as vitamin and iron deficiencies, especially for women, hypertension and diabetes. We argue that, firstly, gendered TD experiences are relevant for documenting women’s activities in order for them to gain political support and, secondly, that targeting women’s care tasks gives more value and impact to TD research results. (shrink)

While in medicine, comparison of the data supplied by a clinical syndrome with the data supplied by the biological system is used to arrive at the most accurate diagnosis, the same cannot be said of financial economics: the accumulation of statistical results that contradict the Brownian hypothesis used in risk modelling, combined with serious empirical problems in the practical implementation of the Black-Scholes-Merton model, the benchmark theory of mathematical finance founded on the Brownian hypothesis, has failed to change the Brownian (...) representation, which has endured for more than fifty years despite the extent of its invalidation by experience. Without any statistical foundations, one mathematical representation has become the established approach, acting in the minds of practitioners as a “prenotion” in the sense the word is used by Durkheim, i.e. a “schematic, summary representation” which has produced a kind of spontaneous epistemology. The question arises of the persistence of this mathematical representation, which has been the basis for every financial risk modelling approach: how can its long life be explained? How was this spontaneous epistemology formed, and why did it prove to be so persistent? To address this question and offer an answer, I will test the various dynamics of scientific knowledge used with reference to financial modelling. All these dynamics are specific ways of describing the relationship between knowledge of a phenomenon and the phenomenon itself. Observing that it is impossible for the positivist approach to solve the financial puzzle, I turn to the three principal postpositivist dynamics, developed by Kuhn, Lakatos and Quine. I shall try to make to speak these representations of science for financial research, in order to reflect on the dominance of the Brownian representation in finance. We shall see that none of the epistemologies examined can explain why the Brownian representation continues to be used in mathematical finance research. I shall then propose an alternative hypothesis, concerning a significant pervading mental model that has irrigated both academics and practitioners in the financial sector: the “principle of continuity” introduced into economics by Marshall in. I consider that this principle of continuity has become a “persistent idea” in the form of a viral approach to representations, and I give this persistent idea the metaphorical name of the “Brownian virus”. Then, to explain the spread of this Brownian virus through the financial sector, the contamination of financial practices by this mental representation founded on the principle of continuity, I introduce the concept of the “financial Logos”, a discourse that structures practices and organisations, calculations, prudential regulations and accounting standards, leading to a general financialisation of society from the 1980s onwards. (shrink)

Science provides us with representations of atoms, elementary particles, polymers, populations, genetic trees, economies, rational decisions, aeroplanes, earthquakes, forest fires, irrigation systems, and the world’s climate. It's through these representations that we learn about the world. This entry explores various different accounts of scientific representation, with a particular focus on how scientific models represent their target systems. As philosophers of science are increasingly acknowledging the importance, if not the primacy, of scientific models as representational units of science, it's important (...) to stress that how they represent plays a fundamental role in how we are to answer other questions in the philosophy of science. This entry begins by disentangling ‘the’ problem of scientific representation, before critically evaluating the current options available in the literature. (shrink)