Medicina Britannica; or A treatise on such physical plants, as are generally to be found in the fields or gardens in Great Britain: containing a particular account of their nature, virtues and uses : Together with the observations of the most learned physicians ... communicated to the late ... Mr. Ray, and Dr. Sim. Pauli ...

Includes note by John Cruso.

Medicina Britannica : or, A treatise on such physical plants as are generally to be found in the fields or gardens in Great-Britain : containing a particular account of their nature, virtues, and uses ... /

Includes: "Three indexes: The first containing the English and Latin names of the plants treated of : The second of the diseases, and their remedies : The third to the notes."

The trust problem in the United States /

Bibliography: p. 567-585.

The camera in the fields, a practical guide to nature photography.

Mode of access: Internet.

The migratory farm labor problem in the United States : report.

Vols. for 1962-64 called 2d-4th.

Research in the fields of civil engineering, mechanical engineering, instrumentation.

Mode of access: Internet.

Multi-level genetic algorithm for the resource-constrained re-entrant scheduling problem in the flow shop

The re-entrant flow shop scheduling problem (RFSP) is regarded as a NP-hard problem and attracted the attention of both researchers and industry. Current approach attempts to minimize the makespan of RFSP without considering the interdependency between the resource constraints and the re-entrant probability. This paper proposed Multi-level genetic algorithm (GA) by including the co-related re-entrant possibility and production mode in multi-level chromosome encoding. Repair operator is incorporated in the Multi-level genetic algorithm so as to revise the infeasible solution by resolving the resource conflict. With the objective of minimizing the makespan, Multi-level genetic algorithm (GA) is proposed and ANOVA is used to fine tune the parameter setting of GA. The experiment shows that the proposed approach is more effective to find the near-optimal schedule than the simulated annealing algorithm for both small-size problem and large-size problem. © 2013 Published by Elsevier Ltd.

Solving the Least Squares Method problem in the AHP for 3 X 3 and 4 X 4 matrices

The Analytic Hierarchy Process (AHP) is one of the most popular methods used in Multi-Attribute Decision Making. The Eigenvector Method (EM) and some distance minimizing methods such as the Least Squares Method (LSM) are of the possible tools for computing the priorities of the alternatives. A method for generating all the solutions of the LSM problem for 3 × 3 and 4 × 4 matrices is discussed in the paper. Our algorithms are based on the theory of resultants.

The order selection and lot sizing problem in the make-to-order environment

This research is motivated by the need for considering lot sizing while accepting customer orders in a make-to-order (MTO) environment, in which each customer order must be delivered by its due date. Job shop is the typical operation model used in an MTO operation, where the production planner must make three concurrent decisions; they are order selection, lot size, and job schedule. These decisions are usually treated separately in the literature and are mostly led to heuristic solutions. The first phase of the study is focused on a formal definition of the problem. Mathematical programming techniques are applied to modeling this problem in terms of its objective, decision variables, and constraints. A commercial solver, CPLEX is applied to solve the resulting mixed-integer linear programming model with small instances to validate the mathematical formulation. The computational result shows it is not practical for solving problems of industrial size, using a commercial solver. The second phase of this study is focused on development of an effective solution approach to this problem of large scale. The proposed solution approach is an iterative process involving three sequential decision steps of order selection, lot sizing, and lot scheduling. A range of simple sequencing rules are identified for each of the three subproblems. Using computer simulation as the tool, an experiment is designed to evaluate their performance against a set of system parameters. For order selection, the proposed weighted most profit rule performs the best. The shifting bottleneck and the earliest operation finish time both are the best scheduling rules. For lot sizing, the proposed minimum cost increase heuristic, based on the Dixon-Silver method performs the best, when the demand-to-capacity ratio at the bottleneck machine is high. The proposed minimum cost heuristic, based on the Wagner-Whitin algorithm is the best lot-sizing heuristic for shops of a low demand-to-capacity ratio. The proposed heuristic is applied to an industrial case to further evaluate its performance. The result shows it can improve an average of total profit by 16.62%. This research contributes to the production planning research community with a complete mathematical definition of the problem and an effective solution approach to solving the problem of industry scale.

Presupuestos y gastos del estado en la provincia de Buenos Aires para afrontar las inundaciones de los campos, 1870-1930

Nos proponemos estudiar la participación de la agencia estatal encargada de la gestión de las obras hídricas en el presupuesto de la provincia de Buenos Aires, puesto que indica la importancia que los gobiernos le dieron al problema de las inundaciones en los campos, y ponderar el aporte privado toda vez que se compelía a los propietarios a pagar un impuesto especial. Nuestro período se extiende desde los primeros esfuerzos realizados por los gobiernos provinciales en la década de 1870, hasta 1930 en que empezó un ciclo más seco y los problemas en los métodos de desagüe se postergaron. Enfocaremos el análisis a través de los registros oficiales, los debates en las cámaras de la Legislatura provincial y los mensajes de los gobernadores. Vamos a ponderar la importancia del Ministerio de Obras Públicas entre los diferentes rubros aprobados por la legislatura, seguidamente analizaremos con mayor detalle las transformaciones en la agencia dedicada a las cuestiones hídricas y la, todavía escasa, información sobre los gastos especiales en obras de desagüe

Presupuestos y gastos del estado en la provincia de Buenos Aires para afrontar las inundaciones de los campos, 1870-1930

Nos proponemos estudiar la participación de la agencia estatal encargada de la gestión de las obras hídricas en el presupuesto de la provincia de Buenos Aires, puesto que indica la importancia que los gobiernos le dieron al problema de las inundaciones en los campos, y ponderar el aporte privado toda vez que se compelía a los propietarios a pagar un impuesto especial. Nuestro período se extiende desde los primeros esfuerzos realizados por los gobiernos provinciales en la década de 1870, hasta 1930 en que empezó un ciclo más seco y los problemas en los métodos de desagüe se postergaron. Enfocaremos el análisis a través de los registros oficiales, los debates en las cámaras de la Legislatura provincial y los mensajes de los gobernadores. Vamos a ponderar la importancia del Ministerio de Obras Públicas entre los diferentes rubros aprobados por la legislatura, seguidamente analizaremos con mayor detalle las transformaciones en la agencia dedicada a las cuestiones hídricas y la, todavía escasa, información sobre los gastos especiales en obras de desagüe

Presupuestos y gastos del estado en la provincia de Buenos Aires para afrontar las inundaciones de los campos, 1870-1930

Nos proponemos estudiar la participación de la agencia estatal encargada de la gestión de las obras hídricas en el presupuesto de la provincia de Buenos Aires, puesto que indica la importancia que los gobiernos le dieron al problema de las inundaciones en los campos, y ponderar el aporte privado toda vez que se compelía a los propietarios a pagar un impuesto especial. Nuestro período se extiende desde los primeros esfuerzos realizados por los gobiernos provinciales en la década de 1870, hasta 1930 en que empezó un ciclo más seco y los problemas en los métodos de desagüe se postergaron. Enfocaremos el análisis a través de los registros oficiales, los debates en las cámaras de la Legislatura provincial y los mensajes de los gobernadores. Vamos a ponderar la importancia del Ministerio de Obras Públicas entre los diferentes rubros aprobados por la legislatura, seguidamente analizaremos con mayor detalle las transformaciones en la agencia dedicada a las cuestiones hídricas y la, todavía escasa, información sobre los gastos especiales en obras de desagüe

Dynamics of ammonium and pH in the solution of soils with different salinity levels, growing irrigated rice

Rice in Rio Grande do Sul State is grown mostly under flooding, which induces a series of chemical, physical and biological changes in the root environment. These changes, combined with the presence of rice plants, affect the availability of exchangeable ammonium (NH4+) and pH of soil solution, whereas the dynamics of both variables can be influenced by soil salinity, a common problem in the coastal region. This study was conducted to evaluate the dynamics of exchangeable NH4+ and pH in the soil solution, and their relation in the solution of Albaqualf soils with different salinity levels, under rice. Four field experiments were conducted with soils with exchangeable Na percentage (ESP) of 5.6, 9.0, 21.2, and 32.7 %. Prior to flooding, soil solution collectors were installed at depths of 5, 10 and 20 cm. The soil solution was collected weekly, from 7 to 91 days after flooding (DAF), to analyze exchangeable NH4+ and pH in the samples. Plant tissue was sampled 77 DAF, to determine N uptake and estimate the contribution of other N forms to rice nutrition. The content of exchangeable NH4+ decreased over time at all sites and depths, with a more pronounced reduction in soils with lower salinity levels, reaching values close to zero. A possible contribution of non-exchangeable NH4+ forms and N from soil organic matter to rice nutrition was observed. Soil pH decreased with time in soils with ESP 5.6 and 9.0 %, being positively correlated with the decreasing NH4+ levels at these sites.

'A load too heavy': Critical reflections on the child labor problem in Africa's small-scale mining sector

This paper provides an extended analysis of the child labor problem in the artisanal and small-scale mining (ASM) sector, focusing specifically on the situation in sub-Saharan Africa. In recent years, the issue of child labor in ASM has garnered significant attention from the International Labor Organization (ILO), which has been particularly active in raising public awareness of the problem; and, has proceeded to implement policies and collaborative project work aimed at Curtailing children's participation in ASM activities in a number of African countries. The analysis concludes with a critical appraisal of an ILO project recently launched in the Talensi-Nabdam District in the Upper East Region of Ghana, which sheds light on how the child labor problem is being tackled in practice in ASM communities in sub-Saharan Africa. (c) 2008 Elsevier Ltd. All rights reserved.

Synoptic preconditions for extreme flooding during the summer Asian Monsoon in the Mumbai area

The summer monsoon season is an important hydrometeorological feature of the Indian subcontinent and it has significant socioeconomic impacts. This study is aimed at understanding the processes associated with the occurrence of catastrophic flood events. The study has two novel features that add to the existing body of knowledge about the South Asian Monsoon: 1) combine traditional hydrometeorological observations (rain gauge measurements) with unconventional data (media and state historical records of reported flooding) to produce value-added century-long time-series of potential flood events, and 2) identify the larger regional synoptic conditions leading to days with flood potential in the time-series. The promise of mining unconventional data to extend hydrometeorological records is demonstrated in this study. The synoptic evolution of flooding events in the western-central coast of India and the densely populated Mumbai area are shown to correspond to active monsoon periods with embedded low-pressure centers and have far upstream influence from the western edge of the Indian Ocean basin. The coastal processes along the Arabian Peninsula where the currents interact with the continental shelf are found to be key features of extremes during the South Asian Monsoon