Šiame magistro darbe aptarsime keletą projekcijos metodų: tai pagrindinių komponenčių analizė (Principal Component Analysis (PCA)), daugiamačių skalių (Multidimensional Scaling (MDS)) ir santykinės perspektyvos (relational perspective map (RPM)). Tirsime, kuris iš trijų pradinių projekcijos taškų parinkimo būdų - atsitiktinis, pagrindinių komponenčių ar didžiausių dispersijų garantuoja mažesnę paklaidą RPM algoritme. Atliksime paprasto RPM algoritmo, pasiūlyto autoriaus James Xinzhi Li modifikaciją. Taip pat tirsime parametrus r,a (mokymo greičiai), nustatysime, kaip jie įtakoja RPM algoritmo konvergavimą. Integruosime MDS ir RPM algoritmus į internetinę terpę. Vizualiai vaizduosime daugiamačių duomenų projekcijas. / This paper deals with a methods, called the relational perspective map and multidimentional scaling. Relational perspective map that visualizes multidimensional data onto two-dimensional closed plane. It tries to preserve the distances between the multidimensional data in the lowerdimensional space. But the most important feature of the relational perspective map is the ability to visualize data in a non-overlapping manner so that it reveals small distances better than other known visualization methods. In the methods are In this paper, the features of relational perspective map are explored experimentally and some disadvantages are noticed. We have proposed a modification of this method, which enables us to avoid them. Also we have stored RPM and MDS algorithms in php language and included them in web site for testing these methods online. But allow testing only small data, because algorithms in php language works longer that stored in c++ language.

Color is a visual characteristic which imparts the ability to categorize different objects. When light strikes an object, there are three possibilities as to what can happen. The light may be reflected, refracted or scattered. Human perception of color is due to a combination of these. Plastics are polymeric materials. Polymers are generally colorless and need colorants in order to have some color. One or more pigments in certain ratios can be used to give a specific color to plastics. Slight variations in the proportions of either of the used pigments, or their dispersion, may result in a color that is different from the desired one. There can also be many other reasons for color mismatch such as processing or degradation effects. This study utilized the historical data records of SABIC IP to look at effects of changing Grade on color (i.e. when the same color is produced from resin blends which may have different amounts of resins, pigments or additives). These records were also used to study effects of change in screw diameter and configuration on color (i.e. when the same grade of a color is produced on two different production lines, different screw diameters and configurations). The effects of the processing parameters on the colors were also investigated by carrying out experiments using a twin screw extruder at SABIC IP’s plant in Cobourg. Resins, pigments and additives were dry blended and extruded while being subjected to different processing conditions. Three processing parameters, namely temperature, rpm and feed-rate, were chosen for the study. A three level factorial design of experiments was used. An analysis of variance (ANOVA) has been utilized to find the effects of individual parameters on color and the interaction between two parameters and their cumulative effect on color. / UOIT

This thesis is focused on design and implementation of toolchain for compilation and installation of RPM packages from SRPM packages in Fedora Linux distribution. Tools can be set up to modify compiler options and rpm macros. A tool for custom compilation of Linux kernel was also implemented. This tool builds the kernel with default options or according to configuration supplied by user. The toolchain was used to create customized distribution. Resulting distribution contains these tools for compilation and installation of additional software.

With advancing technology, Chip Multi-processor (CMP) architectures have emerged as a viable solution for designing processors. Networks-On-Chip (NOCs) provide a scalable communication method for CMP architectures with increasing numbers of cores. Although there has been significant research on NOC designs for unicast traffic, the research on the multicast router design is still in its infant stage. Considering that one-to-many (multicast) and one-to-all (broadcast) traffic are more common in CMP applications, it is important to design a router providing efficient multicasting. In this thesis, a lookahead multicast routing algorithm with limited area overhead is proposed. This lookahead algorithm reduces network latency by removing the need for a separate routing computation (RC) stage. An efficient area optimization technique is put forward to achieve minimal area overhead for the lookahead RC stage. Also, a novel compression scheme is proposed for multicast packet headers to alleviate their big overhead in large networks. Comprehensive simulation results show that with the new route computation logic design and area overhead optimization, providing lookahead routing in the multicast router only costs less than 20 percent area overhead and this percentage keeps decreasing with larger network sizes. Compared with the basic lookahead routing design, our design can save area by over 50 percent. With header compression and lookahead multicast routing, the network performance can be improved on an average by 22 percent for a (16 x 16) network.

2. Teil des UNIX-Stammtischs vom 25.3.97 Arbeit mit src-Paketen, Erzeugung eigener Pakete, Syntax und Semantik des spec-Files, Problematik der verschiebbaren Pakete

Der Vortrag gibt einen Überblick zu RPM als Paketverwaltung für Unix/Linux-Systeme. Der Bau von RPM-Paketen wird an einem einfachen Beispiel skizziert. Paketverwaltungswerkzeuge (yum) werden vorgestellt.

This report analyzes the impact of some important factors on the prediction of detection probabilities for radiation portal monitors (RPMs). The application of innovative detection technology to improve operational sensitivity of RPMs has received increasing attention in recent decades. In particular, two alarm algorithms, gross count and energy windowing, have been developed to try to distinguish between special nuclear material (SNM) and naturally occurring radioactive material (NORM). However, the use of the two detection strategies is quite limited due to a very large number of unpredictable threat scenarios. We address this problem by implementing a new Monte Carlo radiation transport simulation approach to model a large set of threat scenarios with predefined conditions. In this report, our attention is focused on the effect of two important factors on the detected energy spectra in RPMs, the mass of individual nuclear isotopes and the thickness of shielding materials. To study the relationship between these factors and the resulting spectra, we apply several advanced statistical regression models for different types of data, including a multinomial logit model, an ordinal logit model, and a curvilinear regression model. By utilizing our new simulation technique together with these sophisticated regression models, we achieve a better understanding of the system response under various conditions. We find that the different masses of the isotopes change the isotopes’ effect on the energy spectra. In analyzing the joint impact of isotopes’ mass and shielding thickness, we obtain a nonlinear relation between the two factors and the gross count of gamma photons in the energy spectrum. / text

Trafficking of radioactive material, particularly special nuclear material (SNM), has long been a worldwide concern. To interdict this material the US government has installed radiation portal monitors (RPMs) around the globe. Building materials surrounding an RPM can greatly effect the detector’s background radiation levels due to Naturally Occurring Radioactive Material (NORM). In some cases this effect is so great that the initial RPM setup had to be rebuilt. This thesis develops a methodology for quick and efficient determination of the specific activity and composition of building materials surrounding a RPM to predict background levels, therefore determining the minimum detectable quantity (MDQ) of material. This methodology builds on previous work by Ryan et al by generating material and source cards for a detailed Monte Carlo N-Particle (MCNP) deck, based on an experimental RPM setup to predict the overall gamma background at a site. Gamma spectra were acquired from samples of building materials and analyzed to determine the specific activity of the samples. A code was developed to estimate the elemental composition of building materials using the gamma transmission of the samples. These results were compared to previous Neutron Activation Analysis (NAA) on the same samples. It was determined that densitometry provided an elemental approximation within 5% of that found through NAA. Using the specific activity and material composition, an MCNP deck was used to predict the gamma background levels in the detectors of a typical RPM. These results were compared against actual measurements at the RPM site, and shown to be within 10% of each other.

International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / Understanding the horsepower demands that electrical and hydraulic systems place on an aircraft engine is critical since this directly effects engine performance. The current methods of measuring horsepower have been mainly limited to lower rpm engines and are not suitable for higher rpm jet engines. L-3 Telemetry East has developed instrumentation for the F-22 instrumentation group that is capable of measuring horsepower loads on engine shafts that are rotating at up to 18000RPM. This paper describes the operation of this system.

Dredge cutting forces produced by the movement of the cutterhead through the sediment have been measured with the laboratory dredge carriage located at the Haynes Coastal Engineering Laboratory. The sediment bed that was used for the dredging test was considered to be relatively smooth and the sediment used was sand with a d50=0.27 mm. Forces on the dredge carriage were measured using five 13.3 kN (3000 lb) one directional load cells placed on the dredge ladder in various places so the transmitted cutting forces could be obtained. The objectives for this study are to determine the vertical, horizontal, and axial forces that are produced by the cutterhead while testing. So, to find these cutter forces, a static analysis was performed on the carriage by applying static loads to the cutterhead in the vertical, horizontal, and axial directions, and for each load that was applied, readings were recorded for all five of the load cells. Then, static equilibrium equations were developed for the dredge carriage ladder to determine loads in the five load cells. Also, equilibrium equations can be applied to a dredging test to find the cutterhead forces by taking the measured data from the five load cells and applying the known forces to the equations, and the cutterhead forces can be determined. These static equilibrium equations have been confirmed by using a program called SolidWorks, which is modeling software that can be used to do static finite element analysis of structural systems to determine stresses, displacement, and pin and bolt forces. Data that were gathered from the experimental procedure and the theoretical calculations show that the force on the dredge cutterhead can be determined. However, the results from the static equilibrium calculations and the results from the SolidWorks program were compared to the experiment procedure results, and from the comparison the procedure results show irregularities when a force of approximately 0.889 kN (200 lb) or above is applied to the cutterhead in a north, south, west, or east orientation. The SolidWorks program was used to determine the results for displacements of the dredge carriage ladder system, which showed that large displacements were occurring at the location of the cutterhead, and when the cutterhead displaces it means that the carriage ladder is also moving, which causes false readings in the five load cells. From this analysis it was determined that a sixth force transducer was needed to produce more resistance on the ladder; and the cell #1 location needed to be redesigned to make the ladder system as rigid as possible and able to produce good testing results. The SolidWorks program was used to determine the best location where the sixth force transducer would give the best results, and this location was determined to be on the lower south-west corner oriented in the direction east to west. The static equilibrium equations were rewritten to include the new redesigned cell #1 location and the new location of the sixth load cell. From the new system of equations, forces on the cutterhead can be determined for future dredging studies conducted with the dredge carriage. Finally, the forces on the laboratory cuttersuction dredge model cutterhead were scaled up to the prototype 61 cm (24 in) cuttersuction dredge. These scaled up cutting forces on the dredge cutterhead can be utilized in the design of the swing winches, swing cable size, ladder supports, and ladder.