Let Π be an ergodic simple point process on Rd, and let Π be its Palm version. Thorisson [13] proved that there exists a shift coupling of Π and Π; that is, one can select a (random) point Y of Π such that translating Π by −Y yields a configuration whose law is that of Π. We construct shift couplings in which Y and Π are functions of Π, and prove that there is no shift coupling in which Π is a ...

Eukaryotic cells use a process called endocytosis to take up materials from their environment and package them for use within the cell. The best-studied form of endocytosis—receptor-mediated endocytosis—has several stages. In the first step, the cell’s outer membrane dimples to form a pocket. A protein collar then assembles around this pocket, forming a thin neck leading to a bulb of membrane. ...

loading conditions and complex geometry have led the cylinder heads to become the most challenging parts of diesel engines. one of the most important durability problems in diesel engines is due to the cracks valves bridge area. the purpose of this study is a thermo-mechanical analysis of cylinder heads of diesel engines using a two-layer viscoplasticity model. in this article, mechanical prope...

BACKGROUND Previous studies regarding modular head-neck taper corrosion were largely based on cobalt chrome (CoCr) alloy femoral heads. Less is known about head-neck taper corrosion with ceramic femoral heads. QUESTIONS/PURPOSES We asked (1) whether ceramic heads resulted in less taper corrosion than CoCr heads; (2) what device and patient factors influence taper fretting corrosion; and (3) w...

We propose a method for tracking human heads, where interaction between hypotheses plays a key role. We model appearances of the human head and generate hypotheses for a human head in the image in the model space. We then propagate and reform hypotheses over time in turn to realize tracking human heads. During tracking, we bring about interaction between hypotheses to eliminate the hypotheses d...

OBJECTIVES The use of ceramic femoral heads in total hip arthroplasty (THA) has increased due to their proven low bearing wear characteristics. Ceramic femoral heads are also thought to reduce wear and corrosion at the head-stem junction with titanium (Ti) stems when compared with metal heads. We sought to evaluate taper damage of ceramic compared with metal heads when paired with cobalt chromi...

this study was conducted to find out the best outside points of skull to reach different areas of brain thatare essential for neuroendocrinological studies. in this research 30 heads of iranian native male goats agedbetween 2-3-year-old were collected from shahrekord abattoir. after collecting whole heads, they were fixedin 10% formalin and then many holes were made on the dorsal surface of sku...

The cargo transporter myosin-VI processively walks along actin filaments using its two heads. Here we use single-molecule nanometry to show that the strong binding by myosin heads to actin is greatly accelerated (approximately 30-fold) when backward strain is applied to weakly bound heads during the actin search. We propose that the myosin head searches for the forward actin target by Brownian ...

BACKGROUND Assistance during delivery by a skilled attendant is recommended as a means to reduce child and maternal mortality. Globally, higher levels of maternal education have been associated with better health behaviours at delivery. However, given that heads of households tend to be the decision makers regarding accessing healthcare, some educated mothers may find themselves prevented from ...