This work concerns the modelling and experimental verification of the highly nonlinear friction behavior in positioning on the nanometer scale. The main goal of this work is to adjust and identify a simple dynamic friction model which allows a model-based estimation of the friction force in combination with the system inertia against displacement. Experiments in the pre-sliding and sliding fric...

According to corporate social responsibility (CSR), firms should conduct activities focusing not only on the self-interest of firm but also benefiting society. Drawing CSR approach, this study investigates barriers employment for people with physical disabilities (PWPDs) in Hong Kong (HK) tourism industry. Forty-seven human resources (HR) managers, directors, and members HK Hotel Association we...

In the general framework of tracking control of hydraulic servo systems, this paper presents a comparison between two main possibilities to include friction information in the picture: experimental identification and estimation. Experiments were first conducted in order to find a suitable representation for friction in the system. We then looked at two observers reported in the literature (know...

The mixed Hegselmann-Krause (HK) model consists of a finite number agents characterized by their opinion, vector in $ {\bf{R^d}} $. For the deterministic case, each agent updates its opinion rule: decide degree stubbornness and mix with average neighbors, whose differs at most some confidence threshold from time step. is studied deterministically [22]. In this paper, we study it nondeterministi...

Previous studies on the interaction of high molecular weight kininogen (HK) with endothelial cells have reported a large number of binding sites (106-107 sites/cell) with differing relative affinities (KD = 7-130 nm) and have implicated various receptors or receptor complexes. In this study, we examined the binding of HK to human umbilical vein endothelial cells (HUVEC) with a novel assay syste...

In tumour cells, elevated levels of mitochondria-bound isoforms of hexokinase (HK-I and HK-II) result in the evasion of apoptosis, thereby allowing the cells to continue proliferating. The molecular mechanisms by which bound HK promotes cell survival are not yet fully understood. Our studies relying on the purified mitochondrial outer membrane protein VDAC (voltage-dependent anion channel), iso...

High molecular weight kininogen (HK) is a multifunctional plasma glycoprotein that occupies a critical position in pathways that link inflammation and coagulation. It is an inhibitor of sulfhydryl proteases and has procoagulant properties. It is also a source of the vasoactive peptide bradykinin (BK). It has been previously shown that HK binds to human umbilical vein endothelial cells (HUVEC) i...

The paper deals with experimental friction identificat ion method of a DC motor. For precise positioning tasks a friction phenomenon plays a large problem. For this a friction has to be identified and subsequently compensated if it is important. At first the paper deals with basic friction models. In the next section the DC motor mathemat ical model is stated. The DC motor friction identificat ...

In this paper, adaptive friction compensation is investigated using both model-based and neural network (non-model-based) parametrization techniques. After a comprehensive list of commonly used models for friction is presented, model-based and non-modelbased adaptive friction controllers are developed with guaranteed closed-loop stability. Intensive computer simulations are carried out to show ...

Formulating a consistent theory for rigidbody dynamics with impacts is an intricate problem. Twenty years ago Stewart published the first consistent theory with purely inelastic impacts and an impulsive friction model analogous to Coulomb friction. In this paper we demonstrate that the consistent impact model can exhibit multiple solutions with a varying degree of dissipation even in the single...