EXPERIMENTAL PRICE VARIABILITY AND CONSUMER RESPONSE: TRACKING POTATO SALES WITH SCANNERS

Consumer/Household Economics, Demand and Price Analysis,

Review Article: MHD Wave propagation near coronal null points of magnetic fields

We present a comprehensive review of MHD wave behaviour in the neighbourhood of coronal null points: locations where the magnetic field, and hence the local Alfvén speed, is zero. The behaviour of all three MHD wave modes, i.e. the Alfvén wave and the fast and slow magnetoacoustic waves, has been investigated in the neighbourhood of 2D, 2.5D and (to a certain extent) 3D magnetic null points, for a variety of assumptions, configurations and geometries. In general, it is found that the fast magnetoacoustic wave behaviour is dictated by the Alfvén-speed profile. In a β=0 plasma, the fast wave is focused towards the null point by a refraction effect and all the wave energy, and thus current density, accumulates close to the null point. Thus, null points will be locations for preferential heating by fast waves. Independently, the Alfvén wave is found to propagate along magnetic fieldlines and is confined to the fieldlines it is generated on. As the wave approaches the null point, it spreads out due to the diverging fieldlines. Eventually, the Alfvén wave accumulates along the separatrices (in 2D) or along the spine or fan-plane (in 3D). Hence, Alfvén wave energy will be preferentially dissipated at these locations. It is clear that the magnetic field plays a fundamental role in the propagation and properties of MHD waves in the neighbourhood of coronal null points. This topic is a fundamental plasma process and results so far have also lead to critical insights into reconnection, mode-coupling, quasi-periodic pulsations and phase-mixing

N-Body visualizations

In the age of technology and information, data calculations and visualizations are key to the communication and understanding of the world in which we live. It is sometimes difficult to display data in a way to make it clear and understanding, or is difficult to calculate the data to be displayed. The N-body problem has elements of both. The N-body problem is a set of N particles representing stars that move in response to the gravitational force generated by the N-1 other particles. There have been many attacks to this problem. The GRAPEcluster Project of RIT has developed software and hardware to display these systems in images and film. The movies provide a wealth of information, but there are properties in the videos that cannot be seen, compared, or studied. The purpose of this project is to be able to show some of these physical properties in a way that can offer insight into the properties and behaviors of particle systems, to allow the comparison of the properties of different systems to be more easily done

Auriferous Tertiary Gravels Near Rocker, in Silver Bow County, Montana

Between the villages of Rocker and Silver Bow, in south­western Montana, are found an interesting group of placers. Gold occurs in Tertiary gravel beds that are interstratified with beds of rhyolitic volcanic ash. With the aid of a plane table and open-sight alidade, a small portion of the lake-bed area near Rocker was mapped; all distances were paced, but numerous checks assure a fairly accurate map

Modeling of Aircraft Deicing Fluid Induced Biochemical Oxygen Demand in Subsurface-Flow Constructed Treatment Wetlands

Aircraft deicing is vital to safe operation in cold weather environments. Unfortunately, release of glycol-based aircraft deicing fluids (ADF) to waterways adjacent to airfields poses a significant environmental threat. The deicing fluids used at DoD airfields impart a high biochemical oxygen demand (BOD) when they enter waterways. The currently accepted conventional treatment is collection and transport of ADF-laden storm water to a publicly owned treatment works. The volume and BOD concentrations in the storm water often make this type of treatment impractical. Subsurface flow constructed treatment wetlands have been demonstrated to be effective in attenuating ADF-induced BOD. The models currently used to design and model these types of wetlands focus on simple input-output relationships and do not take underlying processes into account. This study explores the use of a system dynamics modeling method as the basis for a useful design and management tool. The model focuses on simulating storm water flow between defined sections of the wetland and microbial kinetics in each section. Microbial utilization of substrates leads to attenuation in well-designed wetlands. The model exhibits the potential to be a useful tool for this and possibly other applications

Allowing Federal Courts Access to International Court of Justice Advisory Opinions: Critique and Proposal

Supporters of the idea that the rule of law should govern the world community have generally been disappointed by the meager role the International Court of Justice (ICJ) has played in international affairs and in the development of international law. Most of the explanations for the ICJ\u27s underuse point to a single factor: that the vast majority of nation states, including the United States, choose not to risk their interests to the judgment of an independent international tribunal. This Note first examines two suggested modifications of the ICJ as proposed by the United States Congress and the American Bar Association. The author, however, reaches an alternate conclusion: that the United States should take the first step toward reaching that objective by revoking its reservation to the ICJ\u27s jurisdiction