50,390 research outputs found
Wally and the Major [picture] : hot-rod /
No full textPart of the Stan Cross Archive of cartoons and drawings, 1912-1974.; Inscription: "Stan Cross 9/126"--In ink, lower right. "5875 Thur May 28 Hot-Rod"--In ink, right margin; "5795"--In pencil, upper right corner; "10"--In pencil, upper left corner.; Also available in an electronic version via the internet at: http://nla.gov.au/nla.pic-vn4302716
Contact Pressure Measurement System in Cross Wedge Rolling
No full textIn the cross wedge rolling process (CWR), plastic deformation is geared by a driving torque transmitted by friction on die surface. Friction plays a role which has to be further identified in this metal forming process. The local contact pressure between a cylindrical billet and flat dies seems to be a relevant parameter to characterize the severe contact conditions during the rolling. This paper deals with an experimental measurement technology, which has been designed and implemented on a semi-industrial CWR test bench with plate configuration. This measurement system using pin and piezoelectric sensor is presented, with an analysis of the system operation and design detail. Characterization of systematic error and calibration tests are then explained. Additional tests performed on hot steel preforms allow to check the ability of the contact pressure measurement system to resist under severe operating conditions. Realistic results for varying temperatures are then discussed
A note on the diffraction by a semi-Infinite thick half plane, and a semi-infinite cylindrical rod with an absorbent end face
No full textThe known solutions for:
(i) A plane wave incident on two rigid semi-infinite parallel plane distance 2b apart, (ii) The radiation of an arbitrary mode from two parallel rigid semi-infinite plates 2b apart,
are used to construct the solution of the problem of the diffraction of a plane wave by a semi-infinite thick half plane (thickness 2b), whose sides are rigid and whose end face is absorbent. The method used is simple superposition of the solutions (i) and (ii). The problem solved has applications in noise barrier design. Analogously by using the known solutions for the diffraction of a plane wave by, and the radiation of an arbitrary mode from, a rigid hollow cylindrical semi-infinite duct, the solution for the diffraction of a plane wave by a thick semi-infinite rigid rod with an absorbent end face can be obtained
The Acceleration Wave in a Thin Two-Material and Three-Segmental Rod with Slowly Changing Cross-Section Made of Murnaghan Material
No full textThe paper presents propagation of acceleration waves in a thin rod with slowly changing cross-section made of hyperelastic Murnaghan material. Analytical calculations were made based on the models obtained for the intensity of the transmitted and reflected wave. Numerical analysis of the velocity of wave propagation in the three-segmental rod made of two compressible elastic materials (steel and aluminum) has been made
Cell wall assembly in Bacillus megaterium: incorporation of new peptidoglycan by a monomer addition process
No full textThe pattern of cross-linking in the peptidoglycan of Bacillus megaterium has been studied by the pulsed addition of radiolabeled diaminopimelic acid. The distribution of label in muropeptides, generated by digestion with Chalaropsis muramidase and separated by high-performance liquid chromatography, stabilized after 0.15 of a generation time. The proportion of label in the acceptor and donor positions of isolated muropeptide dimers stabilized over the same period of time. The results have led to the formulation a new model for the assembly of peptidoglycan into the cylindrical wall of B. megaterium by a monomer addition process. Single nascent glycan peptide strands form cross-linkages only with material at the inner surface of the wall. Maturation is a direct consequence of subsequent incorporation of further new glycan peptide strands, and there is no secondary cross-linking process. The initial distribution of muropeptides is constant. It follows that the final pattern of cross-linking in the wall is determined solely by, and can be forecast from, this repetitive pattern of incorporation. In a modified form, this model can also be applied to assembly of cell walls in rod-shaped gram-negative bacteria
Cross-Cultural Meta-Analyses
No full textIn the enormous collection of cross-cultural data that have been published during the last few decades it is difficult to perceive patterns. There is a clear need for systematizing the vast amount of cross-cultural studies and for developing models that explain cross-cultural differences in psychology. Two methods of cross-cultural meta-analysis can be distinguished. First, the instrument-based method of comparing data for one instrument across countries is suitable for instruments which have been administered in many countries. Second, a domain-based meta-analysis used a thematic domain from which culture-comparative studies are sampled instead of one specific instrument or method
Stress Wave Propagation in a Rayleigh–Love Rod with Sudden Cross-Sectional Area Variations Impacted by a Striker Rod
No full textThis paper presents an in-depth study of the stress wave behavior propagating in a Rayleigh–Love rod with sudden cross-sectional area variations. The analytical solutions of stress waves are derived for the reflection and transmission propagation behavior at the interface of the cross-sectional area change in the rod, considering inertia and Poisson’s effects on the rod material. Examples solved using the finite element method are provided to verify the correctness of the analytical results. Based on the forward analysis of Rayleigh–Love wave propagation in a rod impacted by a striker rod, an impact-echo-type nondestructive testing (NDT) method is proposed to conduct defect assessment in rod-type structural components with sudden cross-sectional area changes within a cover medium. This proposed NDT method can identify the location, extension, and cross-sectional area drop ratios of an irregular zone in the rod to be inspected
Cross-Ply BendingaAnd Stability of Compressed Bar with Crack
No full textThe analysis of rod cross-ply bending and stability of rod systems in the presence of cracks is the aim of this paper. Using Maxwell's theorem about the reciprosity of displacements and the linear fracture mechanics methods for research of mechanical properties of rod systems in presence of cracks, there were obtained the main equation of the cross-ply bending, its common solution, the expression of relation between the rod deflection and the distributing cross-force and transcendental equation for determination of interior boundary of critical fotrce of rod with a crack
Cross-Border Cooperation: Subverting Sovereignty?
No full textWork on European spatial planning has led me to criticise what I call territorialism.It conceives of the world in terms of a seamless cover of sovereign stateslooking after its territory each as if it were its property. In the European Unionthough, states are enveloped by a superstructure. Does this mean that there is aEuropean territory and, if so, how does it relate to the territories of its MemberStates? The issue becomes manifest in such efforts, as there have been undertaken,to arrive at a form of European spatial planning.Spatial Planning and Strateg
On the Stability of Rod with Variable Cross-section
No full textAbstractThere is a solution of the problem of the stability of a compressed rod with a variable cross-section. A rectangular cross-section with a variable width is selected as the section. The result is that the problem leads to a differential equation of the fourth order with variable coefficients. From the solution of this equation, a critical force for several particular cases. These cases reflect some different conditions fixing rod and function changes of the width of the cross-section
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