Effects of heat input rates on T-1 and T-1A steel welds

Technology of T-1 and T-1A steels is emphasized in investigation of their weld-fabrication. Welding heat input rate, production weldment circumstances, and standards of welding control are considered

Consumer Valuation of Protection from Creditor Remedies

This study investigates the values consumers place on restrictions of creditor remedies. The unique data employed were derived from a 1979 consumer survey taken across four local credit markets that differed significantly in their legal environments. The results of binomial logit analysis identified the characteristics of consumers who were willing to pay for contractual protection from several creditor remedies. A study of the dollar amounts that consumers were inclined to pay provided few significant results

Social Efficiency of the Bankruptcy Reform Act of 1978 With Regard to Personal Bankruptcy

A socially efficient bankruptcy law is one that would have the effect or minimizing the present value of social costs stemming from bankruptcy while permitting debtors to make a fresh start. Analysis of a sample or petitions for personal nonbusiness bankruptcy filed under the Bankruptcy Reform Act or 1978 shows that about 30 percent or petitions for Chapter 7 and about 25 percent of petitions for Chapter 13 were cases where social costs were not minimized as would be required under socially efficient bankruptcy legislation. The social costs of Chapter 7 may be reduced under proposed reform (S.445 and H.R. 1800) as the judge would be provided with information concerning estimates of debts repayable under both chapters and would disallow those Chapter 7 cases which represented a substantial abuse of bankruptcy law. The study data suggest that guidelines for acceptance or Chapter 13 cases should also be scrutinized. In particular, petitioners should be discouraged from providing token debt repayment plans while maintaining ownership or large accumulations of assets

Deregulation, Tax Reform, and the Use of Consumer Credit

This article analyzes the probable effects of recent deregulation of consumer credit markets and tax reform on household credit-use decisions. The results of the analysis suggest that deregulation of rates of charge for consumer credit contracts accounts for a substantial portion of the increase in consumer credit outstanding relative to household income since 1982. The effect would not originate from the extention of credit in newly deregulated markets to households that had not been able to get credit before (widening of credit use). Rather, it would come from the provision of greater amounts of credit to borrowers in general (deepening of credit use). With regard to tax reform, the probability of debt use is significantly higher for those households most likely to itemize deductions for federal income tax purposes. Holding the level of interest rates constant, tax reform that removes the deductibility of consumer interest is not expected to affect the amount of credit used relative to income but is expected to have a significant effect on the type of debt used by such households. They will likely be early adopters of home equity lines of credit. Their shift from consumer to mortgage credit is expected to have a long-term negative effect on the credit quality of consumer credit portfolios

Credit Cards and The Option to Default

The value of the option to default on unsecured credit contracts is estimated and found to be significantly impacted by state and federal laws governing creditors\u27 collection practices and bankruptcy. The data suggest that the expected value of the option to default influences debtors\u27 choices in default and is correlated with their use of their credit cards before default. Cardholders who use their lines of credit very intensely before default are significantly more likely to make choices in default which allow them to realize a greater benefit from default. Furthermore, these results offer a possible explanation for consumers\u27 seeming insensitivity to interest rates charged on revolving lines of credit

High-performance thermionic converter Quarterly progress report, 13 Nov. 1965 - 13 Feb. 1966

Stability and optimization parameters of cesium vapor thermionic converters studied in high performance long life equipment fabrication projec

Identification Techniques Applied to a Passive Elasto-magnetic Suspension

The paper presents an experimental passive elasto-magnetic suspension based on rare-earth permanent magnets, characterized by negligible dependence on mass of its natural frequency. The nonlinear behaviour of this system, equipped with a traditional linear elastic spring coupled to a magnetic spring, is analysed in time domain, for non-zero initial conditions, and in frequency domain, by applying sweep excitations to the test rig base. The dynamics of the system is very complex in dependence of the magnetic contribution, showing both hardening behaviour in the elasto-magnetic setup, and softening motion amplitude dependent behaviour in the purely magnetic case. Hence it is necessary to adopt nonlinear identification techniques, such as non-parametric restoring force mapping method and direct parametric estimation technique, in order to identify the system parameters in the different configurations. Finally, it is discussed the ability of identified versus analytical models in reproducing the nonlinear dependency of frequency on motion amplitude and the presence of jump phenomen

Groundwater compartmentalisation: a water table height and geochemical analysis of the structural controls on the subdivision of a major aquifer, the Sherwood Sandstone, Merseyside, UK

International audienceCompartmentalisation, the subdivision of an aquifer into discrete and relatively isolated units, may be of critical importance for the protection of groundwater although it has been largely ignored in the groundwater literature. The Lower Triassic Sherwood Sandstone, in north west of England, UK, may be a good example of an aquifer that has been compartmentalised by numerous high angle faults with displacements of up to 300 m. The study was initiated to assess the local groundwater flow, the extent of seawater invasion and the controls on recharge in the aquifer and to try to understand whether the aquifer is broken into discrete compartments. Maps and schematic cross-sections of groundwater heads for the years 1993, and 2002 were prepared to trace any structural controls on the groundwater heads across the area. Studying the contour maps and cross sections revealed that: 1) there are substantial differences in groundwater head across some of the NNW-SSE trending faults implying that groundwater flow is strongly limited by faults, 2) an anticline in the east of the area acts as a groundwater divide and 3) the groundwater head seems to follow the topography in some places, although steep changes in groundwater head occur across faults showing that they locally control the groundwater head. The aquifer was thus provisionally subdivided into several hydrogeological sub-basins based on groundwater head patterns and the occurrence of major structural features (faults and a fold). Using groundwater geochemistry data, contour maps of chloride and sulphate concentration largely support the structural sub-division of the area into hydrogeological sub-basins. Scrutiny of groundwater geochemical data, averaged for each sub-basin, confirmed the degree of compartmentalisation and the occurrence of sealed faults. The variation of the geochemical composition of the groundwater not only relates to the different, localised geochemical processes and seawater intrusion but also relates to compartmentalisation due to faulting. Faults have limited the degree of mixing between the groundwater types thus retaining the specific characteristics of each sub-basin. Highly localised seawater intrusion is mainly controlled by low permeability fault close to the Irish Sea and Mersey estuary. There is effectively no invasion of seawater beyond the faults that lie closest to the coastline. Freshwater recharge to the aquifer seems to be highly localised and mainly occurs by vertical percolation of rain and surface water rather than whole aquifer-scale groundwater flow. This study provides a detailed understanding of the groundwater flow processes in Liverpool as an example of methods can be applied to groundwater management elsewhere

Groundwater compartmentalisation: a geochemical analysis of the structural controls on the subdivision of a major aquifer, the Sherwood Sandstone, Merseyside, UK

International audienceThe study was initiated to assess the local groundwater flow, the extent of seawater invasion and the controls on recharge in the aquifer and to try to understand whether the aquifer is broken into discrete compartments. The study area is located in the northwest of England and encompasses the urban area of Liverpool and surrounding countryside and extends east-west from Liverpool to Widnes and as far north as Formby. The Irish Sea marks the western margin of the area while the Mersey estuary defines the southern margin. The Triassic sandstone in this area has been, and remains, an important aquifer although industrialisation and groundwater exploitation have led to significant water quality problems. Maps of water table for the years 1993, 1997, 2000 and 2002 and schematic cross-sections of the water table height along the faults were prepared to trace any effect of these faults on water table height across. Studying the water table maps and cross sections revealed that: 1) there are substantial differences in water table height across some of the NNW-SSE trending faults implying that groundwater flow is strongly limited by fault, 2) an anticline in the east of the area acts as a groundwater divide and 3) the water table seems to follow the topography in some places, although steep changes in water table occur across faults showings that they locally control the water table elevation. The aquifer was thus provisionally subdivided into several hydrogeological sub-basins based on water table height patterns and the occurrence of major structural features (faults and a fold). Using groundwater geochemistry data, contour maps of chloride and sulphate concentration largely support the structural sub-division of the area into hydrogeological sub-basins. Scrutiny of groundwater geochemical data, averaged for each sub-basin, confirmed the degree of compartmentalisation and the occurrence of sealed faults. The variation of the geochemical composition of the groundwater not only relates to the different, localised geochemical processes and seawater intrusion but also relate to compartmentalisation due to faulting. Faults have limited the degree of mixing between the groundwater types thus retaining the specific characteristics of each sub-basin. Highly localised seawater intrusion is mainly controlled by low permeability fault close to the Irish Sea and Mersey estuary. There is no effectively no invasion of seawater beyond the faults that lie closest to the coastline. Freshwater recharge to the aquifer must be highly localised and will mainly occur by vertical percolation of rain and surface water rather than whole aquifer-scale groundwater flow