This thesis is a proposal of a mobile wheel alignment system for passenger cars. Firstly, basic requirements for the manageability of a vehicle, as well as the most important parameters needed for the proper understanding of wheel alignment are explained. Further on, the text is focused on the construction, functioning and main principles of wheel alignment systems used for checking of the wheel alignment of both passenger cars, as well as race cars. Main differences will be explained. The second part is an analysis of a proposal of a wheel alignment system. Four different solutions are presented, all of them having undergone an analysis of their traction, as well as deformation. Each solution is supplemented with a calculation of price and used materials. Finally, all parts of a system are described in detail.

The aim of master thesis is the design of full suspension mountain bike frame for racing and competition use. The base of the design solution is selection optimal conception of suspension which influence external design of the frame. General benefit of this concept is utilizing specific properties of carbon composite for design of funkcional frame parts and their technical and visual integration. Important part of this work is design of frame details: rear ends, rear shox's link and duct of the bowdens, wires and brake hydraulic housing.

This thesis deals with design of the lift frame with lift capacity1600kg and with calculation of distance between armatures of quides. Lift speed is 0.48 m / s. This thesis also includes final element analysis of the frame in software I-DEAS.

<p>In this thesis, we theoretically and experimentally investigate the linear and nonlinear dynamic behavior of a frame structure, which frequently occurs in engineering applications. The structure consists of three continuous steel beams that are connected by two brass hinges. Experimental modal analysis indicates that the obtained natural frequencies are highly sensitive to changes in the oscillation amplitude, even for small motions. Thus, the amplitude range where linear responses can be expected is, in practice, very small. Instead, a strong nonlinear behavior is exhibited by the experimentally obtained backbone curves for small vibrations. Furthermore, the experimentally obtained frequency-response curves exhibit jump phenomena.</p> <p> We investigated experimentally whether the nonlinear dynamic characteristics of the structure are the result of modal interactions, such as internal and combination resonances. We were unable to activate any of these resonances. Next, we investigated whether these characteristics are due to geometric, inertia, material, or damping nonlinearities. The answer is again negative. Finally, we examined the nonideal dynamic characteristics of the hinges. We found that stiffness degradation hysteretic damping in the hinges is the best model that explains the observed nonlinear dynamic behavior. A multilinear stiffness degradation model was used to describe the overall hysteretic load-displacement relation. An approximate analytical approach was used to compute the steady-state response of the structure to a harmonic excitation. A good qualitative agreement between the computations and the experimental results was obtained.</p> / Master of Science

Timber-frame brick veneer construction originated in countries in which houses were traditionally constructed with loadbearing timber frames which were clad with non-loadbearing weather boarding or similar light-weight materials. Timber-frame house construction is extensively used in countries such as Canada, Scandinavia, Australia and North America. With the Canadian system, buildings of up to three storeys can be erected with loadbearing timber frames. This particular system was also adopted in France - the Igny project~ and in England - the Harlow project. In most of these cases, basements or crawl-spaces underneath the house were incorporated in the design. In these countries there have a trend towards the use of a brick cladding (veneer) for timber-frame structures. This is a comparatively recent introduction in these countries, but it has already been extensively used. This trend is primarily related to the appearance and other advantages (for example durability and ease of maintenance in the case of a face-brick clauding) of a masonry exterior, while largely retaining the low cost benefits of timber-frame construction.

Inelastic design methods have been used in seismic design for several years and are well accepted in engineering practice. In contrast, an inelastic wind design method is yet to be developed, in part due to the inherent differences between seismic forces and wind forces. Current wind design practice follows a linear method to find a design windspeed for the location where the structure will be built. Once the design windspeed has been determined, the lateral force resisting system is designed such that it will behave elastically. This study was conducted with the hypothesis that by providing ductility at the material level, member level, and system level it may be possible to use a reduced design force for wind (i.e., a design force reduction that is proportional to a wind response modification factor). A three-story office building that uses steel moment frames as the primary lateral force resisting system was examined to test the hypothesis. Various levels of ductility were included based on ductility requirements for material strength, section stability and system stability originally developed for seismic design. Moment frames were designed for a range of design windspeeds and for three levels of ductility. For each design windspeed, a non-ductile (representing the moment frame as it would be designed by current standards), moderately-ductile and highly-ductile moment frame were developed. A finite element model of the building was made to capture inelastic material behavior and large displacements. The finite element model was subjected to wind loads based on wind tunnel tests data, and the static pushover, vibration, and dynamic responses of the building were evaluated. The performance of each moderately-ductile and highly-ductile moment frame was compared to the performance of each non-ductile frame of a higher design windspeed. The results show that for moderately-ductile moment frames, a wind response modification factor equal to 2 provided a collapse capacity that met or exceeded the collapse capacity of the comparative nonductile moment frame. For highly-ductile moment frames, a wind response modification factor equal to 3 met or exceeded the collapse capacity of the comparative non-ductile moment frame. In many instances, the collapse capacity of the moderately-ductile moment frame was similar to the collapse capacity of the highly-ductile moment frame. Thus, the results indicate that the use of a response modification factor for wind may be viable.

Despite their sudden growth in popularity, the role-playing actual-play podcasts have either been ignored or grouped with the genre of audio drama in prior scholarly works. Examination using frame analysis shows, however, that these podcasts are distinct in their engagement of the audience on multiple, simultaneous levels; levels which correspond with well-known media genres such as Documentary, Fiction, and Game Play. Each frame has its own layer of identities, conduct, and avenue for appealing to audiences just as these genres have their own distinct appeals. Through the combinations of these frames, familiar tropes and techniques such as Short-Form Improv and Campbell's monomyth are broadened and challenged, and identities become entangled in this post-modern medium. Delineating the features of these frames and exploring their interactions and interconnectivity not only helps to distinguish the actual-play podcast as its own distinct podcast genre, but also highlights the potential for using such frames or frame analysis in other media forms.

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Ribosomes translate the genetic information encoded by mRNA into proteins. Defective mRNAs can cause stalling of translating ribosomes. The molecule tmRNA (transfer-messenger RNA) rescues stalled ribosomes in eubacteria. Together with its protein partner SmpB, tmRNA mimics a tRNA by entering the ribosomal A site and linking an alanine residue to the growing polypeptide chain. The ribosome then abandons the defective mRNA template and resumes translation on tmRNA, adding ten more amino acids to the nascent polypeptide. As a result of tmRNA action, stalled ribosomes are released and recycled, the defective mRNA is destroyed, and the aborted protein product is tagged for destruction by proteases. It is unknown how the ribosome correctly chooses the position on tmRNA to resume translation. Previous studies implicate the sequence UAGUC found immediately upstream of the first codon in the tmRNA open reading frame. These nucleotides are highly conserved in natural tmRNA sequences. Mutations in this area cause loss of tmRNA function and improper frame choice. Using a genetic selection that ties the life of E. coli cells to the function of tmRNA, we have identified several SmpB mutants that rescue an inactive tmRNA in which this upstream sequence was altered. This links SmpB to the function of these key tmRNA nucleotides. We show that our SmpB mutants affect frame choice using an in vivo assay for tagging in the various frames. We conclude that SmpB plays a role in setting the reading frame on tmRNA.