In this paper a discrete-time GI/G/1 (General Independent arrivals/General service times/single server) queueing model is considered. It is useful for design and performance evaluation of asynchronous communication systems, in particular for ATM (Asynchronous Transfer Mode) systems. The model assumes an infinite waiting time room (buffer). The attention is focused on the equilibrium distributio...

We have used a model accounting for absorption by vibrationally and rotationally excited ozone (03) to examine published measurements of he quantum yield of O(•D) and O2(•Ag) from 03 photolysis in the Huggins band (305-325 nm). We conclude that the quantum yield of O(•D) is 0.2-0.3 for wavelengths between 312 and 320 nm at 298 K; in contrast, the JPL recommended quantum yield of O(•D) is neglig...

The significance and extent of band-tail states in the luminescence and dosimetry properties of natural aluminosilicates (feldspars) is investigated by means of studies using low temperature (10 K) irradiation and optically stimulated luminescence (OSL) stimulation spectroscopy, and thermoluminescence (TL) in the range 10-200 K, made in comparison with high temperature (300 K) irradiation and p...

Segments of carotid and tail artery, and thoracic aorta from control and hypertensive animals (DOCA + salt) were used for the study of mechanics and/or chemical composition. Pressure-diameter measurements were made on intact segments under conditions of active (145 mM-K+) and passive (O-Ca++ and 2 mM-EGTA) smooth muscle. Segments were used for chemical analyses of connective tissue content, wat...

A new photoelectric sensor capable of detecting tail pulses even in unheated rats was tested for accuracy in indirect measurements of blood pressure. This sensor proved more sensitive than a Doppler ultrasonic flowmeter because it allowed detection not only of tail pulsations without preheating but also of peak oscillations usable for estimating mean arterial pressure. After blood pressures in ...

Fourteen different morphological traits in 169 and 131 cattle of Oulmes-Zaer and Tidili, respectively were recorded and analyzed using a multivariate approach. The characters measured included heart girth, wither height, rump height, rump length, rump width, chest depth, body length, neck length, cannon circumference, ear length, ear width, head length, horn length and tail length. Breed signif...

The global distribution of surficial hydroxyl on the Moon is hypothesized to be derived from implantation solar wind protons. As traverses geomagnetic tail, it generally shielded wind; therefore, concentration hydrogen expected decrease during full Moon. A Monte Carlo approach used model diffusion implanted atoms in regolith as they form metastable bonds with O atoms, and subsequent degassing H...

anthropometric measurements is a simple and reliable tool for assessment of nutritional status of children. in this study height and weight of 23,170 middle class school children of 6-14 years in the city of shiraz and four rural areas were measured. results showed no difference among the rural and urban children. they were close to the third percentile of boston standard for height and weight ...

Autotomy has evolved in many animal lineages as a means of predator escape, and involves the voluntary shedding of body parts. In vertebrates, caudal autotomy (or tail shedding) is the most common form, and it is particularly widespread in lizards. Here, we develop a framework for thinking about how tail loss can have fitness consequences, particularly through its impacts on locomotion. Caudal ...