Thermal Expansion and Magnetostriction Studies of a Kondo Lattice Compound: Ceagsb2

We have investigated a single crystal of CeAgSb2 using low field ac-susceptibility, thermal expansion and magnetostriction measurements in the temperature range 1.5K to 90K. The ac-susceptibility exhibits a sharp peak at 9.7K for both B//c and B perp c due to the magnetic ordering of the Ce moment. The thermal expansion coefficient alpha, exhibits highly anisotropic behaviour between 3K and 80K : alpha is positive for dL/L perp c, but negative for dL/L // c. Furthermore, alpha (for dL/L) perp c (i.e. in ab-plane) exhibits a sharp peak at TN followed by a broad maximum at 20K, while a sharp negative peak at TN followed by a minimum at 20K has been observed for (dL/L //) the c direction. The observed maximum and minimum in alpha(T) at 20K have been attributed to the crystalline field effect on the J=5/2 state of the Ce3+ ion. The magnetostriction also exhibits anisotropic behaviour with a large magnetostriction along the c-axis. The ab-plane magnetostriction exhibits a peak at B=3.3T at 3K, which is consistent with the observed peak in the magnetoresistance measurements.Comment: 4 Pages (B5), 3 figures, submitted to SCES200

The goldstone real-time connected element interferometer

Connected element interferometry (CEI) is a technique of observing a celestial radio source at two spatially separated antennas and then interfering the received signals to extract the relative phase of the signal at the two antennas. The high precision of the resulting phase delay data type can provide an accurate determination of the angular position of the radio source relative to the baseline vector between the two stations. This article describes a recently developed connected element interferometer on a 21-km baseline between two antennas at the Deep Space Network's Goldstone, California, tracking complex. Fiber-optic links are used to transmit the data to a common site for processing. The system incorporates a real-time correlator to process these data in real time. The architecture of the system is described, and observational data are presented to characterize the potential performance of such a system. The real-time processing capability offers potential advantages in terms of increased reliability and improved delivery of navigational data for time-critical operations. Angular accuracies of 50-100 nrad are achievable on this baseline

Protecting New Mexico’s Waters: A Blueprint for the Future

Aquatic species are imperiled by water diversions, introduced species, pollution and now climate change. In the western U.S., water law rewards the withdrawal and use of water, rather than leaving water instream for ecological, recreational and other purposes. New Mexico has no statutory protections for environmental flows and is increasing its diversions of water from rivers. This paper discusses the status of instream flows in the state and proposes policies to better protect the state’s waters

Antenuptial Agreements and California Law: Building Confidence

This Comment examines the legal issues surrounding the increased popularity of antenuptial agreements. The author argues that California law has failed to recognize the close and trusting nature of the parties\u27 relationship and has treated prospective spouses as arm\u27s-length adversaries. The author examines the validity of California\u27s arm\u27s-length analysis of antenuptial agreements and contrasts this approach with that of the majority of jurisdictions, which impose a fiduciary relationship on parties entering into antenuptial agreements. The author concludes that the California legislature should adopt the majority view, in accordance with public policy and the intimations of the California Supreme Court

Water and Population in the American West

The American West is justly famed for its sunshine and wide skies.1 However, there is a potent combination of low rainfall and growing population in the West that ensures that water, or the lack of it, will remain another well-known feature of the region. As the number of people sharing already stressed water supplies increases, the economic, ecological, and social costs of providing water become more evident. Agriculture consumes about 90% of the water that is extracted in the West, and the transfer from agricultural to municipal and industrial uses is invariably complex. Increased water extraction has resulted in the loss of species across the western landscape. Groundwater mining is a looming crisis in the West; however, as an issue it is hidden from public consciousness and typically solved by costly water projects. The movement toward sustainability will require a reorientation of public policies to recognize the need to balance human uses with ecological functions, and to incorporate the true costs of water into decision-making. It is important that the public learns that public entities make decisions throughout the year that affect the availability and management of water supply. Issues that should be of concern to consumers include water rates, whether rivers will be tapped for municipal supplies, achievement of water quality standards, whether new development and industry will be encouraged, as well as other issues that profoundly affect the future of western rivers

The Nature of Legal Education and Its Links to Water Management

When water decisions are made, water lawyers are central fi gures, and decisions are made within the framework of the governing institutions. In this essay, I discuss legal education and the training of a water lawyer. Students from other disciplines may seek out legal education, so approaches to their education are considered

Keep Your Money: Let the West Pay for its Own Water Projects

The question posed here is what role the federal government should play in responding to the western water crisis, in light of the changes in the social and political landscape that have occurred in the last decade. My thesis is that solutions to water needs that are funded locally are more likely to be sustainable than those produced through national appropriations. My thinking is affected by the work I did on a Presidential commission that recommended sustainability be the cornerstone of western water policy

Its Time for a State Environmental Policy Act

What single law should be the first step in protecting New Mexico\u27s environment from the consequences of our cascading population? My nomination would go to a State Environmental Policy Act, commonly called a state NEPA. These laws are on one level very simple, requiring only that state governments stop and think before taking actions with significant environmental costs. After twenty-five years of experience with the federal National Environmental Policy Act (NEPA), however, we know that a law that allows citizens input into governmental action has a profound effect on governmental action