Fluctuations associated with stretched E2 transitions from high spin levels in nuclei around 168 Yb are investigated by a cranked shell model extended to include residual two-body interactions. It is found that the gamma-ray energies behave like random variables and the energy spectra show the Poisson fluctuation, in the cranked mean field model without the residual interaction. With two-body r...

centennial of the entire APS family of journals. APS was one of the earliest national biological societies in America and also one of the first to have its own journal (4). Although for its first sixteen years AJP was owned by its editor, William T. Porter, Porter published the journal at the request of APS and under contract to APS. By 1914, APS had assumed full ownership and management. The h...

The derangements of cardiac rhythm that result from occlusion of coronary arteries caught the attention of the earliest experimenters in the field. By the time of the studies of Porter in 1894, it was known that "fibrillar contractions" often were the end result of coronary occlusion and that irregularities of cardiac rhythm commonly preceded terminal ventricular fibrillation. Porter remarked t...

This paper aims to explain the global expansion of the Rip Curl and Quiksilver surfing brands through the lens of Michael Porter’s cluster theory of comparative advantage (Porter, 1998). According to Porter, a cluster of linked businesses can generate commercial synergies and strengths that enable it to achieve a global presence even when it is geographically distant from the major world market...

We develop an ordinary least squares estimator of the long memory parameter from a fractionally integrated process that is an alternative to the Geweke Porter-Hudak estimator. Using the wavelet transform from a fractionally integrated process, we establish a log-linear relationship between the wavelet coe cients' variance and the scaling parameter equal to the long memory parameter. This log-li...

The interest of scientists and companies in understanding the business implications of environmental investment is timely; however, a dilemma remains at the firm level: is the environment a “strategic competitive factor”, as in the “Porter point of view”, or is it a “luxury good”, as in the “Wagner point of view”? Our research contributes to this debate through a review of the papers published ...

Trend in the proportion of bare ground in some Canterbury tussock grasslands is analysed using records of vegetative cover from Fox Peak, South Opuha River (1963-1985); Porter River (1976-1984); Waimakariri Basin (1962-1978); and central Waimakariri River (1947-1981). The overall proportion of bare ground changed little in all four surveys. The lowest altitude site at Fox Peak and a low altitud...

In the previous report (Porter et al., in this issue) morphological changes in Chinese hamster ovary (CHO) cells during the cell cycle were described. In this report we describe the role of intercellular contact on these changes. We find that intercellular contact is required for cells to exhibit the morphologies Porter et al. described for S and G(2). When cells are synchronized by mitotic sel...

FRIEDHEIM, E., AND MICHAELIS, L. 1931 J. Biol. Chem., 91, 355-368. Cit. PORTER, J. R. 1946 Bacterial Chemistry and Physiology. John Wiley & Sons, Inc., New York, p. 426. GAUSE, G. F. 1946 Litmocidin, a new antibiotic substance produced by Proactinomyces cyaneus. J. Bacteriol., 51, 649-653. KRISS, A. E. 1936 Anthocyanin in actinomycetes. Compt. Rend. Acad. Sci. U.R.S.S., n.s., 4, 283-287. Chem. ...

FREDRICK WILLIUS, a physician and historian of cardiology, claimed in 1945, "The achievement of scientific progress is irrevocably based on past experiences, not alone on the experience of one generation of scientists but rather on the numerous generations which have been predecessors. " ' The recent introduction of thrombolytic therapy with intracoronary streptokinase for acute coronary occlus...