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The high flow rate that results as fluid decompresses through the restrictor is arguably the single greatest problem with supercritical fluid extraction techniques. As a result of these high flow rates, solvent trapping is not efficient in many cases, and the more complicated sorbent trapping technique must be used. In addition, loss of the collection solvent may occur during the process making it difficult to work with small volumes, which are desirable from the standpoint of sensitivity, cost, and environmental concerns. Similarly, these high decompressed flows have made it difficult to directly interface supercritical fluid extraction methods with separation techniques. This is unfortunate as supercritical extractions are ideal for on-line coupling in other respects, such as the fact that the fluid becomes gaseous upon depressurization and that supercritical fluids generally extract less contaminant material. In this thesis we have shown that, by elevating the post-restrictor pressure, the decompressed flow rate can be reduced, and these problems can be minimized, considerably. Off-line trapping becomes much simpler when working at elevated pressures as the need for sorbent trapping is virtually eliminated and solvent trapping may be conducted with much less difficulty. Elevated post-restrictor pressures were found to be very beneficial for on-line work as well. SFE/GC was carried out with complete transfer of the extraction effluent to a capillary GC column, which has not previously been demonstrated. Likewise the use of an open-tubular column interface, maintained at moderately elevated pressures, allowed SFE/HPLC to be conducted with quantitative analyte transfer, even in the presence of 10% modifier. In all cases - but especially for the on-line methods - more practical extraction parameters were possible, including extraction vessel volume, extraction flow rate, and dynamic extraction time. Another benefit of elevating the post-restrictor pressure is that higher extraction flow rates will generally be possible. The benefits of this were not evaluated in the research presented here, however, the effect that the extraction flow rate can have on extraction time is considered, from a theoretical standpoint, in Chapter five. / Ph. D.

This paper presents the results of a study on exhaust manifold design for a NASCAR Restrictor plate internal combustion engine. A computer simulation model was developed using Ricardo WAVE software. WAVE is a computer-aided engineering code developed by Ricardo to analyze the dynamics of pressure waves, mass flows and energy losses in ducts, plenums and the intake and exhaust manifolds of various systems and machines. [1] The model was validated against experimental data from a current NASCAR Winston Cup restrictor plate motor. The parameters studied have been exhaust manifold diameters and lengths. A response surface analysis of the simulation output followed. The analysis of results shows the design parameters of the existing exhaust manifold are not optimized. The findings from these studies are used to derive exhaust system design guidelines which define optimum exhaust system geometry to maximize average Brake Horsepower over a given powerband for a restrictor plate NASCAR engine.

Users of internet browsers are constantly monitored, without their consent. By using the JavaScript APIs, it is possible to obtain various information about the browser, which together form a browser fingerprint, which can then be misused. Therefore, the goal of this work is to use a robust fingerprint protection solution of Brave browser and port it to the JavaScript Restrictor extension. In this work, the problematics of obtaining an fingerprint and countermeasures in the Brave browser are analyzed and then compared with the current protection in the JSR extension. The method of porting of Brave's countermeasures is presented and subsequently the procedure of implementation of these defense elements into the browser extension is described. The resulting implementation has been tested and evaluated, with the new protection appearing to be effective.

Slider is a part of turn restrictor mechanism designed by company TOKOZ a.s. It is a part with complicated form and small dimensions from material DC04 (equivalent according to Czech standard ČSN 11 305.21). As the most suitable option for part manufacturing was chosen cutting and bending in progressive die. A design of forming layout with 11 stations was made and considering the outcomes of related calculations preliminarily selected presses LEXN 100 and Kaiser KSTU 1600. Subsequently was designed one row progressive die. Based on this designs were made few variants of part price calculations according to TOKOZ company customs. According to price calculation outcomes was as the most suitable selected press Kaiser KSTU 1600.

The purpose of this thesis is to functionally expand the browser extension prototype created by Ing. Zbyněk Červinka, focused on the privacy protection of the user during his web browsing. Acquired facts about the function of existing tools for safety and privacy protection, such as technology JavaScript Zero, were used in the solution, which was created by employing a technique of encapsulating JavaScript objects and functions. This allows greater anonymity and safety for users during web browsing. The extension was tested and published under the title JavaScript Restrictor. The main benefit of this thesis is the increase of safety from attacks and increase of anonymity linked to the user data harvesting.

The purpose of this thesis is to prevent websites located in public internet from accessing user's internal network through web browser. Acquired knowdledge about modern browser's security mechanism - same-origin policy and options of implementing the web browser extensions using WebExtensions, was used in the solution. Proposed solution is based on WebRequest API, which intercepts and modifies HTTP requests, and extends functionality of existing browser extension JavaScript Restrictor with the ability to detect and prevent the browser to be abused as a proxy for scanning and accessing user's internal network. The implemented solution was tested and accepted as a part of JavaScript Restrictor. The main benefit of this thesis is the protection from possible abusement of a web browser as a proxy, which is not present in existing extensions.

Thesis is bend on design of intake manifold for car Formula SAE. For driving of this car is used engine Yamaha YZF R6 (2005). Design of intake tract is processed so that agrees with rules and specifications for cars Formula SAE. For restriction of engine performance is in intake tract installed restrictor. For filling efficiency uplift of engine is used the resonance effect in intake pipes. Analysis of flow is carry out on simulation software for analyses of one dimensional flow.

Diplomová práce je zaměřena na konstrukční návrh sacího potrubí pro vůz Formula Student. Pro pohon vozu je použit jednoválcový atmosférický benzinový motor Husaberg FE 570. Sací potrubí je navrhováno tak, aby bylo v souladu s pravidly Formula Student. Pro zvýšení plnící účinnosti sací potrubí využívá resonančního efektu. Délky sacího potrubí byly spočítány v software Lotus Engine simulation.

The aim of this diploma thesis is to create a thermodynamic computational model of a single cylinder IC engine for the Formula SAE car. The single cylinder SI engine KTM 500 EXC is considered as a powertrain unit. The intake manifold of the serial enduro motorcycle is modified according to the Formula SAE 2014 rules. Analysis of the one dimensional flow is performed by using Lotus engine simulation software.