T his paper analyses the relation between GNP sectors of Iran’s economy. The different sectors of the economy directly or indirectly affect each other and can complement or follow each other. Using a number of empirical tests, the paper finds evidence of seasonal or periodic integration in the underlying data. This means that the conventional cointegration tests may not be robust and in re...

This paper presents the results of our empirical research in measuring the size and structure of the US information economy in 1992 and 1997, and in assessing the growth experienced by different industries and sectors since Porat’s research on the US information economy in 1967. The study indicates that the share of the information economy in total GNP grew from about 46 percent in 1967 to abou...

It is well known that almost all of the largest economies in the world are already dominated by services. What may be less well known is that many are also evolving towards becoming information economies in the sense of both value added (GNP) and jobs. Of course, this evolution is less advanced in some countries, but the US is already well past the 60% mark in terms of value added. We further e...

This paper measures the size and structure of the U.S. information economy in 1992 and compares them with Marc Porat’s measures for 1967[4]. It also examines the magnitude and growth of the information components of the service sector over the years. The results of this study highlight the importance of information in the U.S. economy. It also documents interesting facts about the growth and co...

Health care spending in the United States more than tripled between 1971 and 1981, increasing from $83 billion to $287 billion. This growth in health sector spending substantially outpaced overall growth in the economy, averaging 13.2 percent per year compared to 10.5 percent for the gross national product (GNP). By 1981, one out of every ten dollars of GNP was spent on health care, compared to...

The influence of the morphology of industrial graphite nanoplate (GNP) materials on their dispersion in polycarbonate (PC) is studied. Three GNP morphology types were identified, namely lamellar, fragmented or compact structure. The dispersion evolution of all GNP types in PC is similar with varying melt temperature, screw speed, or mixing time during melt mixing. Increased shear stress reduces...

Electrostatic attraction, covalent binding, and hydrophobic absorption are spontaneous processes to assemble and disassemble the molecules of gold nanoparticles (GNP). This dynamic change can be performed in the presence of ions, such as NaCl or charged molecules. Current research encompasses the GNP in mediating non-biofouling and investigating the molecular attachment and detachment. Experime...

Calcium silicate (CaSiO3, CS) ceramic composites reinforced with graphene nanoplatelets (GNP) were prepared using hot isostatic pressing (HIP) at 1150°C. Quantitative microstructural analysis suggests that GNP play a role in grain size and is responsible for the improved densification. Raman spectroscopy and scanning electron microscopy showed that GNP survived the harsh processing conditions o...

The focus of this research is to investigate the potential of using exfoliated graphene nanoplatelets, GNP, as the multifunctional reinforcement in fabricating polymer/GNP nanocomposites and then explore their prospective applications in bipolar plates for polymer electrolyte membrane (PEM) fuel cells. Firstly, high density polyethylene (HDPE)/GNP nanocomposites were fabricated using the conven...

We present morphological and electrical characterization of double-stranded DNA (dsDNA) molecules covalently bound to two metal electrodes: an underlying gold surface and a gold nanoparticle (GNP). Conductive atomic force microscope (cAFM) with a metallized tip is used to perform current-voltage (I-V) measurements through dsDNA molecules, connected to GNPs of different diameters 5, 10 and 20 nm...