Data Processing for LISA's Laser Interferometer Tracking System (LITS)

The purpose of this paper is twofold. First, we will present recent results on the data processing for LISA, including algorithms for elimination of clock jitter noise and discussion of the generation of the data averages that will eventually need to be telemetered to the ground. Second, we will argue, based partly on these results, that a laser interferometer tracking system (LITS) that employs independent lasers in each spacecraft is preferable for reasons of simplicity to that in which the lasers in two of the spacecraft are locked to the incoming beam from the third.Comment: 5 pages, Proceedings of the Third LISA Symposium (Golm, Germany, 2000

Public Relations in the Restaurant Industry: Using Visual Social Media to Increase Consumer Relationships

As daily social media usage grows, marketing through these platforms become increasingly important for public relations professionals. Instagram, one of the most popular social media platforms, provides a new way to instantaneously reach millions of potential customers through the use of visuals. However, with limited knowledge of this new public relations tool, standing out and creating a successful presence for your business is difficult. This study is to explore how visual social media, specifically Instagram, can be used to increase consumer knowledge in the restaurant industry. Investigation of current literature regarding the topic and gathered opinions of industry professionals will provide data which will be analyzed to draw conclusions. These finding will help to understand the best practices in promoting restaurants on visual social media platforms

Using Read Aloud Literature to Motivate Resource Room Readers in the Seventh and Eighth Grades

This project provides a reading resource for teachers of seventh and eighth grade reading skills program students. A series of lessons were designed to accompany daily teacher oral reading from a novel selected to match students\u27 reading interest and listening level. The lessons incorportated strategies to increase students\u27 comprehension of readings emphasizing motivation to encourage future reading

The Effects of a Formation Shower and Serrated Slice on a Pilot Plant Papermachine

The objective of this study was to examine the effects of a formation shower and serrated slice on formation, with comparison of an existing fourdrinier shake, at normal operating headbox consistencies and higher than normal consistencies. By replacing the shake with one of the other methods, metal fatigue could be stopped at the pivot point of the oscillating fourdrinier. The high consistency was used to determine if one of these alternative devices would eliminate flocculation tendencies and allow the reduction of water removal demand. The papermachine used in this study was a pilot plant machine running at 60 FPM and producing a 60 lb sheet using 50% hardwood and 50% softwood furnish. The formation shower was difficult to utilize without making significant design changes, because of the configuration of the slice area. Because of this, its performance was unsatisfactory. None of the methods deterred the tendency of the fibers to flocculate at high consistencies. It is possible that the formation shower could effect it to some degree if attached closer to the slice with a sufficient water jet pressure. It was discovered that the serrated slice actually improved the formation quality significantly. This device is simple to construct and requires no fresh water or moving parts, and should be considered for further study. There was also evidence from the tensile results which not only indicated directionality of fibers, but flocs as well

MEDATA - A new concept in medical records management

Computer program for medical records managemen

Measurements of striae in CR+ doped YAG laser crystals

Striations in Czochralski (CZ) grown crystals have been observed in materials such as GaAs, silicon, photorefractive crystals used for data storage, potassium titanyl phosphate crystals and LiNbO3. Several techniques have been used for investigating these defects including electron microscopy, laser scanning tomography, selective photoetching, X-ray diffuse scattering, interference orthoscopy, laser interferometry and micro-Fourier transform infrared spectroscopy mapping. A 2mm thick sample of the material to be investigated is illuminated with light that is absorbed and non-absorbed by the ion concentration to be observed. The back surface of the sample is focused onto a solid-state image detector and images of the input beam and absorbed (and diffracted) beams are captured at two wavelengths. The variation of the coefficient of absorption asa function of distance on the sample can be derived from these measurements. A Big Sky Software Beamcode system is used to capture and display images. Software has been written to convert the Beamcode data files to a format that can be imported into a spreadsheet program such as Quatro Pro. The spreadsheet is then used to manipulate and display data. A model of the intensity map of the striae collected by the imaging system has been proposed and a data analysis procedure derived. From this, the variability of the attenuation coefficient alpha can be generated. Preliminary results show that alpha may vary by a factor of four or five over distances of 100 mu m. Potential errors and problems have been discovered and additional experiments and improvements to the experimental setup are in progress and we must now show that the measurement techniques and data analysis procedures provide 'real' information. Striae are clearly visible at all wavelengths including white light. Their basic spatial frequency does not change radically, at least when changing from blue to green to white light. Further experimental and theoretical work can be done to improve the data collection techniques and to verify the data analysis procedures

Investigation of Mobility Limiting Mechanisms in Undoped Si/SiGe Heterostructures

We perform detailed magnetotransport studies on two-dimensional electron gases (2DEGs) formed in undoped Si/SiGe heterostructures in order to identify the electron mobility limiting mechanisms in this increasingly important materials system. By analyzing data from 26 wafers with different heterostructure growth profiles we observe a strong correlation between the background oxygen concentration in the Si quantum well and the maximum mobility. The highest quality wafer supports a 2DEG with a mobility of 160,000 cm^2/Vs at a density 2.17 x 10^11/cm^2 and exhibits a metal-to-insulator transition at a critical density 0.46 x 10^11/cm^2. We extract a valley splitting of approximately 150 microeV at a magnetic field of 1.8 T. These results provide evidence that undoped Si/SiGe heterostructures are suitable for the fabrication of few-electron quantum dots.Comment: Related papers at http://pettagroup.princeton.ed