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This paper addresses the problem of high resolution parameter estimation of sinusoids corrupted with additive noise. The approach involves maximum a posteriori (MAP) detection and nonlinear estimation using the Extended Kalman Filter. The problem is set up as a multiple hypothesis testing problem with uniform a priori probabilities. Each hypothesis is associated with a particular set of initial conditions that pertain to a given range of values of the signal parameters. The joint detection/estimation filter (JDEF) is then applied to detect the presence of the sinusoid and estimate its parameters. Experimental evaluation of this technique demonstrates accurate performance' in Gaussian noise.

In this paper, we present a more complete picture of the Schottky barrier useful for both injection and detection. The transport properties of the interface are described using a spin-dependent interface resistance, resulting for example from an interfacial-tunneling region.

Twenty-eight laboratory exercises, four projects, and a solutions manual were developed to support the two semester laboratory course sequence. The practica use IBM style PCs with an ISA (Industry Standard Architecture) bus. Borland International's TASM (Turbo Assembler) 2.0 and Turbo C/C++ 3.0 are used to assemble and/or compile software used for the lessons.

An interactive computer program has been developed that assists with the coordination of overcurrent protection devices. An engineer can enter relay or fuse settings, view the resulting characteristic curves on the computer's graphical display, evaluate the coordination of the overcurrent protection devices, and save the data used for both the protection devices and the substation. The program runs on an IBM PC/AT or compatible computer with a VGA interface, but was written in the C programming language so that it could easily be recompiled for another machine.

We have used sputter-deposition and standard lithography to fabricate arrays of cantilevered metal micro-springs on 80 /spl mu/m pitch, and we have obtained 100% electrical contact to 200-pad chips bonded face-down against them. Four-point resistance is 0.38 /spl Omega/ for Mo-Cr springs on Al pads. Since the contacts themselves are not bonded and since the springs have high elastic compliance, this technology is very resistant to mechanical shock and stress, can accommodate large nonplanarity in mating surfaces, facilitates replacement of bad chips, and could be used for wafer-scale probing.

Recent progress by several groups around the world shows that moving average linear time-invariant channels that distort digital communication signals can be identified using only second-order statistics, provided that certain conditions on the channel and data are met. In this paper, a subchannel response matching channel identification method is modified to exploit prior knowledge of the pulse-shaping filter. Computer simulations demonstrate the method's performance as a channel estimator and as an equalizer compared to appropriate lower bounds on the normalized channel estimation error and the bit error rate. >

The status of the physics and engineering databases in high-current accelerators, high-power target design, and neutron reaction rates is discussed. It is concluded that while accelerators are attractive, the necessary system tradeoff studies cannot be made reliably without additional research, particularly in target design and neutron production rates. Since the high-current continuous wave deuterium demonstrator (CWDD) being built at Argonne can play a key role in developing this database, a brief description of this accelerator is provided. >

The impact of the HARD (high aspect ratio design) option on the blanket and shield performance as concluded from CDA (conceptual design activity) is examined. The neutron wall load distributions were calculated for the different operating modes of HARD. The average neutron wall load over the test ports is 30 to 70% higher than CDA, which increases the testing capability of ITER. The net tritium breeding capability of HARD was calculated based on the use of CDA blanket design. The net tritium breeding ratio is 8% less than CDA. However, the increased average neutron wall load over the test sections overrides the impact on the external tritium supply because of shorter operating time for the same neutron fluence. The shielding analysis of HARD suggested several modifications to meet the design limits of CDA. The total inboard thickness at midplane should be restored to 84 cm with the vacuum gap between the shield and the vacuum vessel reduced to 2 cm as in CDA, or 86 cm inboard thickness with the current gap thickness of 4 cm. In addition, it is necessary to extend the upper parts of the side modules to provide extra shielding for the upper divertor region. >

Summary form only given. A needle-like, high-current, electron beam has been produced on the Hermes III and SABRE accelerators at SNL using inductive voltage adder (IVA) technology, and a diode consisting of a needle cathode and a planar anode/bremsstrahlung converter which are both fully immersed in a strong solenoidal magnetic field (12-50 T). Desired nominal parameters are 10 MV, 40 kA, 0.5 mm radius cathode, and 5-35 cm anode-cathode gaps. High dose and small X-ray spot size are required for radiography applications. Results are presented of initial experiments on Hermes III and SABRE, which have produced doses up to 1 kRad@1 meter, and at lower doses, spot sizes as small as 1.7 mm diameter.

Temperature data from commercial analog hot box detector equipment is digitalized, the mean and standard deviation are calculated for each side of a train and wheels with temperature values above a predefined upper limit are identified as hot boxes. The upper limit is measured in standard deviation units above the mean. The results of the statistical analysis of the heat data, alarms generated by other detection equipment, such as high and wide load detectors, other inspection data, such as train length, direction, and location of the inspection site, are reported to a control site in ASCII over a communication channel.

A simple program generator (PG) has been developed that controls instruments on the IEEE-488 bus. The generator can (1) send strings over the bus, (2) read strings from the bus and write the strings to a file or the console, (3) read the status byte of a device on the bus and display the byte or a bit of the byte on the console, (4) display a message on the console, (5) execute a while loop using a predefined loop variable, and (6) execute a conditional statement that depends on data read from an instrument, the status byte of the instrument, or a bit of the status byte. The program asks questions, and the user's responses produce code in the C programming language. The PG works with the National Instruments GPIB-PC interface card and interface routines.

The influence of the energy of the deuteron beam on irradiation parameters of IFMIF is analyzed. The main purpose of this paper is to identify possible positive and negative impacts on irradiation parameters that an increase in the deuteron energy of the IFMIF beam can cause. Several parameters of the facility, such as neutron generation rate, number of neutrons with energy above 20 MeV at the source and in the test assembly, volume with dpa rate above a threshold value, gas production, and gradient of the atomic displacement rate, are analyzed and conclusions are drawn based on the calculated values. It is shown that an increase in the deuteron energy to 40 MeV does not produce a significant negative impact for the elements analyzed, but instead is beneficial in producing nuclear responses more similar to a fusion environment than the lower deuteron energies.

Three lithium target design options are being evaluated for the IFMIF. The impact of various requirements on material selection, lifetime, operation and maintenance are discussed. Analysis for the free jet option is presented. Key aspects include jet stability, thermal and nuclear responses.

Most of the internal functions of the signature analyzer and its IEEE-488 interface are exercised by the test program. The program is written in the C programming language and calls the National Instruments C language GPIB-PC functions. A compiled version of the program runs on an IBM PC/XT or compatible computer and uses the National Instruments GPIB-PC interface board to communicate with the signature analyzer. The program was compiled with the Borland International Turbo C compiler.

Vanadium alloys provide an attractive solution for fusion power plants as they exhibit a potential for low environmental impact due to low level of activation from neutron fluence and a relatively short half-life. They also have attractive material properties for use in a reactor. General Atomics along with Argonne National Laboratory (ANL) and Oak Ridge National Laboratory (ORNL), has developed a plan to utilize vanadium alloys as part of the Radiative Divertor Project (RDP) modification for the DIII-D tokamak. The goal for using vanadium alloys is to provide a meaningful step towards developing advanced materials for fusion power applications by demonstrating the in-service behavior of a vanadium alloy (V-4Cr-4Ti) in a tokamak in conjunction with developing essential fabrication technology for the manufacture of full-scale vanadium alloy components. A phased approach towards utilizing vanadium in DIII-D is being used starting with small coupons and samples, advancing to a small component, and finally a portion of the new double-null, slotted divertor will be fabricated from vanadium alloy product forms. A major portion of the program is research and development to support fabrication and resolve key issues related to environmental effects.

One organization supports files; the other supports data in memory. Two utility programs were written in the C programming language that use the organizations. One program supports entering data into a file through the keyboard; the other utility reads the file, stores the data in memory, and gives the user the option of printing some of the data to a file in a format similar to signature analysis tables.

The costs associated with corrosion of cement kiln baghouses can be as much as $100000 to $500000 per year for each kiln baghouse, depending upon the severity of the problem. Corrosion is caused by acid attack on carbon steel, resulting from the presence of acid producing compounds in raw material, fuels and additives. These compounds typically contain sulfur and chloride. However, weak acids such as carbonic acid can cause slow corrosion over a long period of time. The costs of baghouse corrosion include: repair of tube sheets and bag collars; repair of walls/hopper; cost of new, replacement dust collector; kiln downtime; bag replacement; environmental permit noncompliance fines; reduced production; personnel morale due to unpleasant task of bag replacement; safety hazards; and management distraction from making cement This paper explores the causes and costs of cement kiln baghouse corrosion. Typical system arrangements are discussed with a focus on identifying key problem areas for each unique system. Ways to identify the cause of the corrosion as well as strategies to reduce corrosion are elaborated on. Finally, four case studies are discussed to detail real world problems and solutions.

We present a novel flip-chip packaging technology capable of interconnecting optoelectronic devices packed at very high density. The process utilizes micro-machined cantilevers for establishing electrical contact and is assembled at room temperature without solder. We have used the packaging technology to interconnect various optoelectronic devices, including 200-element arrays of independently addressable VCSELs having 4 /spl mu/m-wide pads on 6 /spl mu/m pitch to silicon CMOS driver chips with equally dense output lines.

Describes a two-dimensional automatic stitching system, which can be used to apply decorative stitches to flat workpieces. Unlike conventional systems with similar capabilities, customised style dependent work pallets are not required. This leads to a considerable reduction in overhead costs. The system has been successfully demonstrated using both leather and synthetic materials. >