The endoplasmic reticulum of Saprolegnia, Dictyuchus, Synura and Cryptomonas may contain tubules less than 20 nm in diameter. In Saprolegnia these tubules have a maximum length of 1-6/tin, a wall of a single layer of colchicine-resistant, osmiophilic subunits, and a tapering end-piece. Flimmer hairs (flagellar hairs) are morphologically similar and are attached to the flagellum sheath by a tape...

We herein report an extremely rare case of pulmonary Langerhans cell histiocytosis with a solitary enlarged inguinal lymph node. A 19-year-old man presented with a non-productive cough lasting for over a five-month period and an enlarged left inguinal lymph node that had persisted for four months. A histopathological study of the lymph node specimens found Langerhans cells coupled with eosinoph...

Using ab initio calculations, structural tapering of silicon nanowires is shown to have a profound effect on their electronic properties. In particular, the electronic structure of small-diameter tapered silicon nanowires is found to have a strong axial dependence, with unoccupied eigenstates being substantially more sensitive to diameter. Moreover, the states corresponding to the highest occup...

We verify the effective refraction index approach (ERIA) developed for surface plasmon propagation in ultrathin tapered metal–dielectric–metal slot waveguides by means of comparison of exact solutions obtained within ERIA for two different profiles and different scales of tapering with finite-difference time-domain numerical simulations. We show that for smooth enough tapering, ERIA gives the p...

This paper presents a design methodology and analytic relationships for the optimal tapering of cascaded buffers which consider the effects of local interconnect capacitance. The method, constant capacitance-to-current ratio tapering (CRT), is based on maintaining the capacitive load to current drive ratio constant, and therefore, the propagation delay of each buffer stage also remains constant...

We present an analytical and numerical study of the problem of mechanical impulse propagation through a horizontal alignment of progressively shrinking (tapered) elastic spheres that are placed between two rigid end walls. The studies are confined to cases where initial loading between the spheres is zero (i.e., in the "sonic vacuum" region). The spheres are assumed to interact via the Hertz po...