Self-lubricating spherical plain bearings are a key component widely used in the aerospace field. The bearing made of titanium alloy has lighter weight and better corrosion resistance. To manufacture outer ring self-lubricating with alloy, two-step extrusion forming process was proposed. Taking GE15DE1TK as an example, finite element simulation model established, test carried out, by TC4 succes...

Nach dem kurzen Bericht ueber die Geschichte van Tetanus; haben wir in diesern Artikel ver­sucht,ueber die Epedirniologie, Pathophisiolo­gie,Aethiologie und die Frueh-und Spaet-Symp­ptome von dieser gcfahrlichen Krankheit,die einen Durchschnitt von 35% Mortalitaet hat,zu berichten.  In disern Artikel legen wir vi.ei wert,besoaders ueber die The·.rapie 1md der Prophyla.xe. Unc:I wii' hal)en bed...

In the pharmaceutical industry, tablets are a common dosage form. As part of manufacturing process, powder in tablet press passes through feeding system called feed-frame before reaching die cavity. Under different conditions (e.g., paddle speed, turret speed), issues such as segregation blend components, over lubrication, and drug particle attrition often occur feed-frame, which affect final p...

der folgende text, der unter der betreuung von herrn dr. touraj rahnema entstanden ist, erw?hnt zuerst kurz die bestimmenden züge der literarischen schule, die im europ?ischen kulturraum allgemein als romantik verstanden wird, will aber darüber hinaus die romantik als eine art lebenshaltung und kunstverst?ndnis begreifen, die unabh?ngig von einer bestimmten kunstperiode genauso auch in ?stliche...

The journal bearings subjected to heavy load and slow speed operates in mixed lubrication regime causing contact between the interacting surfaces and resulting in wear. The complexity of wear behavior and lack of unifying theory/model make wear control very challenging. In the present research work, a methodology is outlined for the minimization of the wear of journal bearing operating in mixed...

The rise of a buoyant bubble and its interaction with a target horizontal wall is simulated with a 2-D numerical code based on the Boundary Element Method (BEM). Developed from a viscous potential flow approximation, the BEM takes into account only the part of the energy dissipation related to the normal viscous stresses. Hence, a simple analytical model based on lubrication approximation is co...

We employ an analogy to traditional dynamic light scattering to describe the inhomogeneous and anisotropic diffusion of colloid particles near a solid boundary measured via evanescent wave dynamic light scattering. Following this approach, we generate new expressions for the short-time self- and collective diffusivities of colloidal dispersions with arbitrary volume fraction. We use these expre...

Despite continuous progress toward tissue engineering of functional articular cartilage, significant challenges still remain. Advances in morphogens, stem cells, and scaffolds have resulted in enhancement of the bulk mechanical properties of engineered constructs, but little attention has been paid to the surface mechanical properties. In the near future, engineered tissues will be able to with...