Seasonal factors influencing the failure of buried water reticulation pipes

While the use of environmental factors in the analysis and prediction of failures of buried reticulation pipes in cold environments has been the focus of extensive work, the same cannot be said for failures occurring on pipes in other (non-freezing) environments. A novel analysis of pipe failures in such an environment is the subject of this paper. An exploratory statistical analysis was undertaken, identifying a peak in failure rates during mid to late summer. This peak was found to correspond to a peak in the rate of circumferential failures, whilst the rate of longitudinal failures remained constant. Investigation into the effect of climate on failure rates revealed that the peak in failure rates occurs due to differential soil movement as the result of shrinkage in expansive soils.     

How different is Japanese corporate finance? An investigation of the information content of new security issues

This article studies the shareholder wealth effects associatedwith 875 new security issues in Japan from January 1, 1985,to May 31, 1991. The announcement of convertible debt issueshas a significant positive abnormal return of 1.05 percent.There is an abnormal return of 0.45 percent at the announcementof equity issues that is off-set by an abnormal return of 1.01percent on the issue day. Abnormal returns are negatively relatedto firm size, so that large Japanese firms have abnormal returnsless different from those of U.S. firms than small Japanesefirms. Our evidence is consistent with the view that Japanesemanagers decide to issue shares based on different considerationsthan American managers.     

Signaling with dividends and share repurchases: a choice between deterministic and stochastic cash disbursements

We study firms signaling with cash disbursements and show thatthe choice of a deterministic or a stochastic disbursement dependson a property of the firm's production function that is analogousto absolute risk aversion for a utility function. With decreasing(increasing) absolute risk aversion, the high-quality firm prefersto distinguish itself from the low-quality firm with a stochastic(deterministic) outlay. We then study in detail two common formsof corporate cash distributions: dividends, a deterministicdisbursement, and share repurchases, a stochastic disbursement.     

The underreaction hypothesis and the new issue puzzle: evidence from Japan

This article investigates the long-term equity performance ofJapanese firms issuing convertible debt and equity. We findthat issuing firms perform poorly (except for equity rightsissues) compared to nonissuing firms even though the stock-pricereaction to convertible debt and equity issues is not negativefor Japanese firms. This underperformance is strongest for firmsissuing public convertible debt. In contrast to the United States,poor performance is not concentrated in smaller firms and infirms with a high market-to-book ratio. Simple behavioral explanationsadvanced for the new issue puzzle in the United States do notseem consistent with the Japanese experience.     

Monitoring of Pressure Transients in Water Supply Networks

Ageing water infrastructure is one of the major problems faced by water utilities around the world at present, and urgent solutions are required in order to maintain the integrity of the water supply network. In order to use pipe failure prediction models, accurate information about loads acting on these pipes is important. Water pressure (steady-state and transient) is one of the key loads that needs to be estimated accurately in order to improve the predictability of pipe failures. This paper reports the results of a pressure monitoring program, which was conducted to measure pressure fluctuations during events of pressure transients in three selected network sections in Australia. Pressure measurements were conducted in network sections which were considered as susceptible to pressure transients. Potential sources of pressure transients were identified, and high speed data loggers were installed in selected locations of each network to measure and monitor pressure transients. Pressure transients that were generated during normal operation were measured for a period of one month in each selected section. Further, some of the pressure transients were manually made to simulate the different pressures due to pump start-ups within the network. Pressure fluctuations that could potentially lead to pipe failures were measured at many locations during the monitoring program (several selected failures were reported in this article). Therefore, the effect of pressure transients must not be ignored in pipe failure prediction.