Springer mai 1989 (3 Ergebnisse)

Buch. Zustand: Neu. Neuware - Figure 1. 1. Map of Great Britain at two different scale levels. (a) Counties, (b)Regions. '-. ' Figure 1. 2. Two alternative aggregations of the Italian provincie in 32 larger areas 4 CHAPTER 1 d . , b) Figure 1. 3 Percentage of votes of the Communist Party in the 1987 Italian political elections (a) and percentage of population over 75 years (b) in 1981 Italian Census in 32 polling districts. The polling districts with values above the average are shaded. Figure 1. 4: First order neighbours (a) and second order neighbours (b) of a reference area. INTRODUCTION 5 While there are several other problems relating to the analysis of areal data, the problem of estimating a spatial correlO!J'am merits special attention. The concept of the correlogram has been borrowed in the spatial literature from the time series analysis. Figure l. 4. a shows the first-order neighbours of a reference area, while Figure 1. 4. b displays the second-order neighbours of the same area. Higher-order neighbours can be defined in a similar fashion. While it is clear that the dependence is strongest between immediate neighbouring areas a certain degree of dependence may be present among higher-order neighbours. This has been shown to be an alternative way of look ing at the sca le problem (Cliff and Ord, 1981, p. l 23). However, unlike the case of a time series where each observation depends only on past observations, here dependence extends in all directions.…

Buch. Zustand: Neu. Neuware - This volume reviews our current knowledge concerning can Several chapters discuss the contributions of genetic asp cer growth and progression as it relates to the etiology of ects, metabolism, endocrine-related aspects and nutrition to human cancer. As emphasized in Volumes I-V of this series, cancer progression. Moreover, our current knowledge con neoplastic diseases are multistep maladies. There are many cerning urbanization factors, radiation, therapy-induced causes for the appearance of neoplastic diseases. Earlier neoplasms, environmentally induced neoplasms (e. g. , chapters in the series have reviewed molecular and cellular mesotheliomas induced by asbestos) and malignant neo aspects of tumor initiation, promotion and progression to plasms in organ transplant recipients are summarized. the invasive and metastatic phenotype. Contributions to the The impact of AIDS on neoplasm development is re initiation and progression of neoplastic diseases are made by viewed from an epidemiologic perspective that explores mul natural features of the environment and by its contaminants tiple facets of immunity, infectious disease, sexual behavior and by nutritional factors. Neoplastic diseases show a dis and blood transfusion. Other chapters investigate the in tinct relationship to a variety of environmental stimuli and fluence of the host immune response in oncogenesis and the to diseases of a non-neoplastic nature. For example, familial relationship between atherosclerotic plaques and tumors.…

Taschenbuch. Zustand: Neu. Neuware - The investigation of the Galactic nucleus and its surroundings is necessarily a modem endeavor, for traditional observations made at visual wavelengths have not even begun to penetrate the veil of -30 magnitudes of visual extinction that intercedes. On the other hand, infrared, and especially radio observers find a relatively unobstructed view of the central portion of the Galaxy, so the study of this arena has proceeded apace with the development of these branches of astronomy. Thus, it is no accident that the first IAU sponsored conference to be held on the Galactic center is timed to coincide with the initiation, or the immediate aftennath, of major technical developments at long wavelengths, including infrared array detectors, millimeter-wavelength aperture synthesis, and self-calibration and refmed deconvolution algorithms in aperture synthesis radio astronomy. The center of the Galaxy is also accessible to X and gamma-ray observers, and progress at high energies has been steady, especially as imaging capabilities are being realized at X-ray wavelengths. However, one might expect that the revolution in the high energy domain is still ahead of us, as instruments with larger collecting areas and improved spatial resolution are now being developed. The youth of this subject is evidenced by the relatively small number of meetings that have been devoted to it.…