Design of a C-testable booth multiplier using a realistic fault model

A Booth multiplier is the most widely used type of multiplier. In this article, the testability issues involved in its design are discussed. In contrast to previous work, the fault model includes not only node stuck-at faults, but also transistor stuck-open and stuck-close faults. Moreover, as a result of adopting a hierarchical testability approach, the designed Booth multiplier turns out to be fully C-testable. To achieve this C-testability, only three additional controllable inputs are required, which results in a negligible area and delay overhead.Currently with Alcatel Bell Telephone.     

Child pedestrian's exposure,accidents and behavior†

Empirical data on children's exposure, accidents and behavior are a necessary prerequisite for the selection of the most important educational objectives, as specified in a concrete form by a more theoretical “behavior requirements analysis”. In this report an attempt is made to summarize the most important empirical findings in this area within the framework of a pedestrian task analysis developed earlier. The report starts with the presentation of a conceptual framework relating the concepts exposure, behavior, conflicts and accidents. The last chapter mentions several research needs which are relevant for the identification and selection of educational objectives and for the evaluation of educational and environmental countermeasures.     

Nonlinear transformations for high level regular array ASIC synthesis

In this paper a new and efficient method is presented for optimizing the mapping ofnonuniform recurrence equations on regular array architectures. The method is based on applyingnonlinear transformations on theindices of the recurrence equations by reindexing groups of operations based on a chosen group communication scheme. The main result of this paper is that the presented method provides a means to map real life high throughput algorithms onto ASIC regular array architectures under real constraints.     

Modelling of fluidized bed reactors—V Combustion of carbon particles—an extension

The problem of the burning of carbon particles in a fluidized bed in which oxygen and carbon dioxide react at the surface of the particles and the carb     

The permeation of hydrocarbons through a polyethylene membrane

Permeation data of a number of linear, branched and cyclic hydrocarbons have been determined up to a pressure of 70% of the saturation vapour pressure and a temperature range of 30–50°C. The concentration of solvent in the membrane at the liquid site has been determined by desorption. An average diffusion coefficient has been computed assuming the liquid concentration in the membrane at the permeate side to be zero. The activation energy of the permeation has been correlated with molecular structure.     

Anionische polyurethanionomer mit trimellitsäureanhydrid als saurer komponente

Two methods are described for the preparation of anionic polyurethanes made from macroglycols, 1,6-hexamethylene diisocyanate, 1,2-diaminoethane, 1,2,4-benzenetricarboxylic acid anhydride and KOH or triethylamine. The ionomers form emulsifier free aqueous dispersions by addition of water to their acetonic solutions.     

Preparation,fabrication and biocompatibility of novel injectable temperature-sensitive chitosan/glycerophosphate/collagen hydrogels

This paper introduces a novel type of injectable temperature-sensitive chitosan/glycerophosphate/collagen (C/GP/Co) hydrogel that possesses great biocompatibility for the culture of adipose tissue-derived stem cells. The C/GP/Co hydrogel is prepared by mixing 2.2% (v/v) chitosan with 50% (w/w) β-glycerophosphate at different proportions and afterwards adding 2 mg/ml of collagen. The gelation time of the prepared solution at 37°C was found to be of around 12 min. The inner structure of the hydrogel presented a porous spongy structure, as observed by scanning electron microscopy. Moreover, the osmolality of the medium in contact with the hydrogel was in the range of 310–330 mmol kg⁻¹. These analyses have shown that the C/GP/Co hydrogels are structurally feasible for cell culture, while their biocompatibility was further examined. Human adipose tissue-derived stem cells (ADSCs) were seeded into the developed C/GP and C/GP/Co hydrogels (The ratios of C/GP and C/GP/Co were 5:1 and 5:1:6, respectively), and the cellular growth was periodically observed under an inverted microscope. The proliferation of ADSCs was detected using cck-8 kits, while cell apoptosis was determined by a Live/Dead Viability/Cytotoxicity kit. After 7 days of culture, cells within the C/GP/Co hydrogels displayed a typical adherent cell morphology and good proliferation with very high cellular viability. It was thus demonstrated that the novel C/GP/Co hydrogel herein described possess excellent cellular compatibility, representing a new alternative as a scaffold for tissue engineering, with the added advantage of being a gel at the body’s temperature that turns liquid at room temperature.