J. Ross - Böcker

Media are objects with content and character that we describe using in-phrases: in the story, in the picture, in the movie, in the dream...Like the propositional attitudes, these objects present a variety of hard problems for semantic and philosophical analysis. This text presents an organized exploration of fundamental questions in the semantics of media. The first three chapters set out a straightforward model within the possible-worlds framework, and consider how it might account for a range of notions applying to media generally: implicit vs. explicit content, propositional vs. individual content, causal vs. intentional content and the idea of a single World of the Medium. The final three chapters examine ways of elaborating the model to cover a range of phenomena keyed to the functionality of particular forms of media. Chapter Four is a discussion of fiction and our apparent reference to fictional characters. Chapter Five deals with the phenomenon of viewpoint in pictorial media. Chapter Six is a study of interactions between users and characters of media centering on the puzzling case of seeing in films.

Stress-induced myocardial ischemia is a frequent manifestation of coronary heart disease, and sympathetic activation is an important precipitating and aggravating factor in such stress- induced ischemia. However, the complex interplay between the sympathetic initiation of myocardial ischemia, ischemia-induced alterations in sympathetic neurotransmission, as well as changes in adrenoceptor density and post-receptor signal transduction that can occur during ischemia remains incompletely understood. Not only the activation of myocardial fJ- adrenoceptors, but also the activation of coronary IX-adrenoceptors can contribute to myocar- dial ischemia. However, the role of fJ-adrenoceptor-mediated increases in contractility relative to heart rate in the initiation of ischemia is not clear, and the significance of IX-adrenoceptor- mediated changes in coronary vasomotor tone, as well as the responsible IX-adrenoceptor subtypes are highly controversial. Malignant arrhythmias may be triggered by both IX- and fJ-adrenergic mechanisms.Current research in this field is focussed not only on the underlying physiological and pathophysiological mechanisms, but also on clinical treatment strategies, e. g. , by fJ-blockade, IX-blockade, bradycardic agents and calcium antagonists. Recent findings were presented and future research directions discussed during the 61" International Titisee Conference, held at the Schwarzwald-Hotel, Titisee, March 29-31, 1990 under the sponsorship of the Boehringer Ingelheim Foundation. Dr. Hasso Schroeder and Dr. Hermann Frohlich deserve special thanks for their generous support and pleasant organization of the meeting. The publication of the proceedings has been made possible by grants from Astra Chemicals, Bayer, ICI, Dr. Karl Thomae, and Upjohn.

The solar radiant energy is in fact the only source of energy for the basic physical processes taking place in the atmosphere and on the earth's surface. When passing through the atmosphere and being reflected by the ground surface, solar radiation undergoes changes and conversions. Some of it is absorbed in the atmosphere and converted into other forms of energy, mainly into heat, and some is scattered by gases, by dust and by water vapour. Because of absorption and scattering in the atmosphere, solar radiation is changed by the time it reaches the earth's surface. That part of it which arrives as a beam of parallel rays is referred to as direct solar radiation, and that which is scattered in the atmosphere and reaches the earth's surface from all directions of the sky is called diffuse solar radiation. Both of them are reflected back into the atmosphere when they reach the earth's surface, and this third type of radiation is defined as reflected radiation. All of these radiations differ from solar radiation arriving at the upper level of the atmosphere in intensity as well as in spectral composition although they all fall within the spectral region of solar radiation. In atmospheric physics these types of radiation are known as short-wave radiation (SWR) as distinguished from long-wave or irifrared radiation (L WR) emitted by the atmosphere and the earth's surface.

The solar radiant energy is in fact the only source of energy for the basic physical processes taking place in the atmosphere and on the earth's surface. When passing through the atmosphere and being reflected by the ground surface, solar radiation undergoes changes and conversions. Some of it is absorbed in the atmosphere and converted into other forms of energy, mainly into heat, and some is scattered by gases, by dust and by water vapour. Because of absorption and scattering in the atmosphere, solar radiation is changed by the time it reaches the earth's surface. That part of it which arrives as a beam of parallel rays is referred to as direct solar radiation, and that which is scattered in the atmosphere and reaches the earth's surface from all directions of the sky is called diffuse solar radiation. Both of them are reflected back into the atmosphere when they reach the earth's surface, and this third type of radiation is defined as reflected radiation. All of these radiations differ from solar radiation arriving at the upper level of the atmosphere in intensity as well as in spectral composition although they all fall within the spectral region of solar radiation. In atmospheric physics these types of radiation are known as short-wave radiation (SWR) as distinguished from long-wave or irifrared radiation (L WR) emitted by the atmosphere and the earth's surface.

Media are objects with content and character that we describe using in- phrases: in the story, in the picture, in the movie, in the dream... Like the propositional attitudes, these objects present a variety of hard problems for semantic and philosophical analysis. The Semantics of Media is an organized exploration of fundamental questions in the semantics of media. The first three chapters set out a straightforward model within the possible-worlds framework, and consider how it might account for a range of notions applying to media generally: implicit vs. explicit content, propositional vs. individual content, causal vs. intentional content and the idea of a single World of the Medium. The final three chapters examine ways of elaborating the model to cover a range of phenomena keyed to the functionality of particular forms of media. Chapter Four is a discussion of fiction and our apparent reference to fictional characters. Chapter Five deals with the phenomenon of viewpoint in pictorial media. Chapter Six is a study of interactions between users and characters of media centering on the puzzling case of seeing in films. The Semantics of Media will be of interest to specialists in the fields of linguistics, philosophy and communications.