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The purpose of this study is to investigate the incorporation of lightweight aggregate concrete modify with fiber (LWACF) in water retaining structure. In developed countries LWACF is being successfully used as structural concrete; however, third-world countries such as Pakistan are still struggling to come up with the practical applications of lightweight concrete in the building and construction industry. One reason is because of the lack of reliable data regarding its performance as a structural member in the building and construction industry.

The present study inspected the flexural and shear tolerance of fiber-reinforced LWACF by testing six beam specimens’ cast, cured and tested after 28 days for the purpose. An overhead tank of 1,000-gallon capacity was also constructed to verify the application of LWACF by observing its water retention behavior. The experimental design included a mix design of concrete at a target strength of 21 MPa for control sample natural aggregate and for synthetic aggregate modified with polypropylene fibers. Compressive strengths of both categories of concrete were also determined by crushing the cylindrical samples at the age of 7, 14, 21 and 28 days. The cast beams were later subjected to the application of two-point loading test until failure.

It was found that the beams fabricated with LWACF possessed better resistance to cracks compared with those fabricated with normal weight concrete, both in terms of number and crack width. The study also concluded that the constructed water tank with LWACF was thermally efficient and structurally sound, as it showed no sign of seepage for the observed period.

On the basis of the results, it can be concluded that the LWACF used has revolutionized the concept of using lightweight aggregates in regular structures and that consequently it will help in a constructing a sustainable environment. One of the useful applications of such material is for water-retaining structures.

The purpose of this study is to develop a methodology for sustainable drinking water management by assessing the existing state of the water supply system in the study area (Allahabad, India). An attempt is made to identify various problems and gaps in the existing system and evolve solutions for the present water supply problems in a GIS framework. Finally, the paper proposes a conceptual framework for sustainable drinking water management.

The study was conducted in four stages. The first stage involved collection of data and background information through various primary and secondary sources including reports and publications of various organizations. This was followed by discussions with various officials of Uttar Pradesh (UP) Jal Nigam (Water Corporation), Jal Sansthan (Water Board), State Ground Water Board, Central Ground Water Board and Municipal Corporation of the city. The second stage involved field studies in a few zones of the city. The third stage involved data input and analysis on a GIS platform, and the fourth stage includes the development of a solution of the present problems and proposing a conceptual framework for ensuring sustainable drinking water management for Allahabad City.

ArcInfo 9.1 has been used as a tool for storing all types of relevant data for analysis and decision making. The various thematic maps include water supply zone map, water deficit localities map, land use map, location of tubewells, overhead tanks, zonal pumping station, ward boundaries, population map, water demand and supply map.

Applicability of a partnership between the public and the private sector has to be checked for proper institutional analysis in Allahabad City.

The paper assesses the problems in the existing water supply system in Allahabad and proposes to give a GIS‐based solution strategy for its sustainability. The proposed GIS‐based conceptual framework would improve the current practice of drinking water management and would reduce the present problem of water crisis. The findings of the study would be useful for cities with similar problems in underdeveloped and developing countries.

THE College of Aeronautical Engineering, Chelsea, his recently installed a brake testing plant in order that students may become quite familiar with Air Ministry requirements for the testing of aero‐engines on a variable torque brake.

ALTHOUGH the fluids used in the machining of metal are included generally under the heading of lubricants, it is well known that their main function is that of a coolant. However, the importance of these oils and solutions to the engineering industry, the very large amounts consumed and the fact that the efficiency of any machining operation depends greatly on their condition, all warrant their inclusion in any series of articles dealing with reclamation. These fluids belong to two main classes. The straight cutting oil (which in practice is more often than not a blend of mineral oil plus fatty oil, sulphur‐ or chlorine‐containing body), and the soluble oil which yields an aqueous emulsion, milky or clear, and of varying fineness of dispersion.

A microminiature incandescent lamp measuring only 0·055 in. in diameter and 0·175 in. in length is being marketed by the Special Products Division of Thorn Electrical Industries, Thorn House, Upper St. Martin's Lane, London, W.C.2. This lamp, the ‘Mite‐T‐Lite’, provides specialists in the field of micro‐miniaturization with a much needed compatible light source which may be used for a wide variety of applications such as photoelectric logic systems, high speed punch card and tape readout devices, compact matrix displays, airborne electronic equipment, and push‐button lighting.

The purpose of this study is to show how scenario-based forecasting can give a better understanding of future commercial potential of a newly developed technology. This study aims to bridge the existing gaps in technology commercialization process for various projects supported under innovation support schemes in India.

The scope of this study is to understand the commercial potential and future deployment prospect of “sun direct hot water system (SDHWS)”. Scenarios have been drawn using “cone of plausibility” method and the commercial potential forecasted under different scenarios using arithmetic and linear regression forecasting tool.

The SDHWS is an incremental innovation but has great potential to overcome major constraints and barriers associated with existing solar water heater (SWH) technologies. Among the three scenarios drawn, plausible scenario is most likely to happen in future. The SDHWS is technically and economically capable of replacing existing conventional systems of SWHs.

The study is limited to developing alternate qualitative scenarios and, further, an attempt to quantify the commercial potential. Various assumptions have been taken because of non-availability of past data on SDHWS technology.

Scenario-based forecasting to understand commercial potential for innovative technology is a new approach. The adoption of such insight and analysis would brighten the chance of SDHWS technology to reach the market.

ON Friday, March 24, 1961, the Minister of Aviation, Mr Peter Thorneyeroft, officially opened a new high supersonic speed wind tunnel at the Royal Aircraft Establishment, Bedford. This tunnel provides the final stage in the present plans for expansion of the wind tunnel facilities at Bedford, being capable of providing speeds from Mach 2.5 up to Mach 5 in a working section measuring 4x3 ft. Three other tunnels arc already in operation at Bedford—these being the 13x9 ft. working section low‐speed tunnel, the 3x3 ft. tunnel, which is transonic and supersonic to Mach 2, and the 8x8 ft. tunnel, which is subsonic and supersonic to Mach 2.8.

The purpose of this paper is to verify claims that water supplied by operators of tanker trucks in Cape Coast does not meet quality standards recommended for human consumption, and to investigate the sources of any contamination.

Samples were collected from a water hydrant from which tanker operators draw water from the Ghana Water Company Limited distribution system in Cape Coast and a number of tankers sampled at random. Additional samples were taken from the premises of a patron of the tanker service and a regular customer of the Ghana Water Company Limited. All samples were subjected to physico‐chemical and bacteriological analyses and the results compared with the World Health Organization's guidelines for drinking water.

It was found out that water supplied by the tanker operators indeed failed to meet the World Health Organization's guidelines for some quality parameters as alleged by patrons of the service. The tanker‐supplied water was found to contain high levels of Escherichia coli, colour, turbidity and total iron. This was found to arise from the management of the water hydrant and the tankers by the Ghana Water Company Limited and the tanker operators respectively.

The study provides a basis for the set of actions that must be taken to safeguard public health and consumer confidence in drinking water supply using tankers as an emerging alternative to conventional water supply in urban centres of the developing world.

The purpose of this paper is to analyze the liquid sloshing behaviors in two-dimensional tanks with various porous baffles under the external excitation.

Adopting the finite element method (FEM) and control variable method to study the impacts of the height, length, number, location, shape, porous-effect parameter of the porous baffle, the external load frequency and the shape of the tank on the liquid sloshing response.

The amplitude of the free surface can be reduced effectively when the baffle opening is appropriate. The anti-sway ability of the system increases in pace with the baffle’s height growing. Under the same conditions, the shapes of the baffles have an important effect on improving the anti-sway ability of the system.

As there exist the differences of the velocity potential between each side of the porous baffle, which means that there are two different velocity potentials at a point on the porous baffle, the conventional finite element modeling technologies are not suitable to be applied here. To deal with this problem, the points on the porous baffle are regarded as two nodes with the same coordinate to model and calculate.

Simplified Galvanizing. A new process which eliminates the pickling and fluxing stages in the galvanizing of steel wire has been introduced to the U.K. by A.E.I. Birlec Ltd. Instead, the wire is annealed in such a way as to permit its direct entry to the zinc bath at correct temperature, thus greatly reducing the heat input needed to keep the bath hot. By this process, the running speed of the wire can be much higher which will give greater production from a given floor space and is claimed to provide an improved zinc coating on the wire with no intermediate layer of zinc‐iron alloy.