A detailed attempt to ground the topological properties of time in the laws of micro- and macro-physical processes. The reversible processes of mechanics are used to define an order among temporally separated events, which is invariant under reversals of time direction. So long as consideration is limited to a single isolated system, a time ensemble, the transfer of the reversibility of the constituent processes of such a system to the system as a whole makes it impossible to define time direction (...) by means of the entropy curve. The directionality of time, accordingly, can only be defined as the direction of the entropy increase of multiple systems, of a space ensemble. A macrostatistical definition of time direction is then based upon the causal relation. The author's view of causation is non-deterministic: the conjunction of two events is caused if they occur together more frequently than can be expected from their chance coincidence. Reichenbach's analyses and arguments are careful and thorough; the book as a whole is a solid achievement. -- M. F. (shrink)

We present four new change detection methods that create an automated change map from a probability map. In this case, the probability map was derived from a 3D model. The primary application of interest is aerial photographic applications, where the appearance, disappearance or change in position of small objects of a selectable class (e.g., cars) must be detected at a high success rate in spite of variations in magnification, lighting and background across the image. The methods rely on an earlier (...) derivation of a probability map. We describe the theory of the four methods, namely Bernoulli variables, Markov Random Fields, connected change, and relaxation-based segmentation, evaluate and compare their performance experimentally on a set probability maps derived from aerial photographs. (shrink)

A data provenance framework is subject to security threats and risks, which increase the uncertainty, or lack of trust, in provenance information. Information assurance is challenged by incomplete information; one cannot exhaustively characterize all threats or all vulnerabilities. One technique that specifically incorporates a probabilistic notion of uncertainty is subjective logic. Subjective logic allows belief and uncertainty, due to incomplete information, to be specified and operated upon in a coherent manner. A mapping from the standard definition of information assurance to (...) a more quantitative subjective logic framework is suggested with a focus on the specific application of data provenance. Finally, specific consideration is given to the notion of uncertainty within subjective logic and its relation to information entropy. Information entropy is an alternative measure of uncertainty and a fundamental relationship is hypothesized between uncertainty in subjective logic and entropy. (shrink)

Thoughts on various subjects arranged in alphabetical order from "abnormal" to "zero."--F. M. S.

In this very readable and interesting book Mr. Weatherby explores the thesis that Newman, while remaining true to Catholic doctrinal orthodoxy, nevertheless, compromised philosophically with the subjectivism, relativism, and individualism inherent in modern thought. Mr. Weatherby further claims that Newman treated these premises of modern thought as though "they were capable of synthesis with Catholic dogma." In coming to this position, Newman rejected the fifteen hundred-year old idea of a unified Christian society and accepted instead the fragmentation on which modern (...) culture is based. To develop his main point, Weatherby divides his book into four parts. Part One, "Newman and the Old Orthodoxy," reveals Newman’s divergence philosophically from the Caroline theological tradition and the Metaphysical poets. Newman did not deny that the Creation reflects the mind of God, but he personally could not find it. He was forced, therefore, to look for the "Paradise within" since he was unable to find God’s Paradise without. In Part Two, "The Spirit Afloat," after examining Newman’s Idealism and his relation to the Alexandrian Fathers, who were essentially mystic and idealist, Weatherby shows that Newman was a man of his times in that he had a much greater affinity with the Romantic poets than with the Metaphysical poets or those of the Middle Ages and Renaissance. These latter expressed metaphorically their full accord with the Thomist and Caroline outlook that God’s operations were visible in every detail of nature and that man by reason can proceed from the order and beauty of the visible world to a knowledge of God. The Romantics, on the other hand, with their more subjective view of life and nature, stressed not so much the external reality as man’s individual apprehension of it. The Romantics’ dominant impulse was their search for the "Paradise within." In Part Three, "Newman’s Modernism: A Theology of Safeguards," a study of Newman’s orthodox subjectivism, individualism, and relativism is presented, and Weatherby uses William R. Ingel’s words on Newman to point out that "one side of religion was based on principles which, when logically drawn out, must lead away from Catholicism in the direction of an individualistic religion of experience, and a substitution of history for dogma which makes all truth relative and all values fluid." Weatherby in Part Four, "The Consequences," articulates his criticism of Newman’s stand. It is, he claims, too radical one. Although Weatherby takes care not to call Newman a revolutionary—only a radical in his thinking—he points out that had Newman followed his anti-traditional mode of thought to its logical conclusion, political and social revolution could have resulted. Weatherby claims that Newman attempts to escape from the revolutionary consequences of his philosophy in that his "radicalism is never translated into religious or political activism." One of the strengths of Mr. Weatherby’s book is the great thoroughness with which he supports his stand. He gives specific and numerous examples and quotations from Newman’s works and from those of the other writers and philosophers he is using to make his point. This method, while admirable on the whole, occasionally results in repetition since Weatherby makes certain to give a summary after each comparison that is made.—M. L. F. (shrink)

In this book of essays, Burrell selects five religious thinkers principally to provide an example of doing hermeneutics. His chapters on Augustine, Anselm, Aquinas, Kierkegaard, and Jung, therefore, not only tell us what they thought about certain religious topics, but propose their procedures as distinct models for religious understanding. To bring out their distinctive contributions to the hermeneutical problem, he has carefully chosen the titles for each essay. Augustine shows us an example of religious understanding as a personal quest while (...) Anselm formulates the quest for such understanding. The systematic reflections of Aquinas constitute an articulation of transcendence. The experiencing of the transcendent is expressed in Kierkegaard’s language of spirit and also in Jung’s language for soul. These are telling titles and well worth mentioning even in a very brief review. (shrink)

Seven scholarly studies developing the thesis that no significant history has been or will be written apart from the historian's having a philosophical and political conception of history." Recognizing the dangers inherent in this recommended interpenetration of history with philosophy and politics, the author discusses its philosophical distortion in dialectical idealism and materialism and its political distortion in the subordination of history to political ideology in Nazi and Soviet totalitarianism. The book is representative of the non-speculative "philosophy of history" being (...) done in Germany today. --F. M. S. (shrink)

This book effectively challenges the dogma that all explanation can be reduced to the "general law" type. The author maintains that this theory accounts for most historical explanation only by making qualifications and exceptions which vitiate whatever force the theory might have and by excluding the most important considerations from the theory itself by calling them "psychological," "heuristic," etc. This leads Dray to argue that the "general law" theory is being assumed true a priori and then forced to fit a (...) mode of explanation to which it is unsuited--indeed, he goes so far as to doubt that the theory is suitable for physics. Because he meets the analytic defenders of the theory on their own ground, his criticisms are lucid, relevant, and compelling; but the constructive proposals are sketchy.--F. M. S. (shrink)

A nicely documented and interesting, though loosely argued and dogmatic, study, from a neo-Calvinist perspective, of the Christian doctrine of man and its relation to doctrines of man implicit in politics, literature and philosophy.--F. M. S.

A report on the teacher education programs supported by the Fund for the Advancement of Education which calls for a broad liberal education for all teachers and greater attention to the philosophy of education.--F. M. S.

Volumes two and three of this six-volume work together deal with Greek culture from its pre-hellenic origins to the period of the Skeptics. It is philosophy of history in the grand style. Though the language is diffuse and metaphorical, the work is learned and has a certain precision. Voegelin's thesis is that the creation of order is a constant of human nature. A concrete society, besides being an organization for pragmatic survival, is also an attunement with the order of being (...) and an attempt to bring the two realms into harmony. The Greek pragmatic order took the form of polis, and its conception of the order of being reached its highest form in the overcoming of the cosmological myth in the philosophy of Plato and Aristotle.--F. M. S. (shrink)

Beckwith believes logical positivism is the most significant theory of all time. Unfortunately, he neither states nor defends it well.--F. M. S.

A competent and philosophically subtle study of S. K.'s notion of the relation of Christianity and history. The relation of time and eternity, of "sacred history" and ordinary history and the problem of contemporaneity in the Fragments, the Postscript and Training in Christianity are brought into focus through S. K.'s doctrine of the incarnation. This Holm interprets as "fictionalist"; "it is valid to believe that this man is God... as if it were so, although his empirical appearance can never reveal (...) it." --F. M. S. (shrink)

A sympathetic study of the Anabaptist-Mennonite tradition which attempts to clarify the nature of the Free Church heritage and show its contributions to religious and political freedom. Though well-documented and competent, it is episodic and somewhat disorganized; it dwells less on history than on the relevance of Free Church ideas to contemporary problems of religion and society.--F. M. S.

Berkson maintains that the "progressive" distortions of Dewey were not entirely unfounded and criticizes Dewey for his individualism, for a biologicism which cannot ground his own intentions except by a tour de force, and for his failure to recognize the necessity of clearly formulated ideal ends. Emphasizes the Hegelian side of Dewey.--F. M. S.

The final volume in the fine translation of Cassirer's central work deals with the problem of knowledge, "the structure and articulation of a theoretical world view." The analysis proceeds from perception and representation, through the function of signification and the idea of concept, to mathematics and the highest forms of natural science. Cassirer's introduction offers a concise discussion in historical context of the idea of symbolic form itself.--F. M. S.

A statement and defense of the view that time is neither an accident of motion nor a receptacle for motion but measured motion itself. The classical objections to this view, offered by Aristotle, Plotinus, Augustine, and Isaac Barrow, are briefly considered.--M. F.

The author states his thesis in outline form thus: "Tillich’s system, I hold, is composed of three basic elements which, for practical purposes, can be extended to four. These are: the philosophical ontology, the theological phenomenology, the ‘theme’ of union-separation-reunion, and the ‘dialectic’ of the potential-actual-fulfilled. The dialectic is the theme at work. The theme is the dialectic in structural form. Only by radically distinguishing the philosophical ontology from the theological phenomenology, and each from the theme, can a clear view (...) of his use of philosophy and theology be obtained". Although he is not entirely successful in establishing his thesis, Mahan does make a contribution to Tillichian studies by an approach that differs from the usual commentary. The first four chapters of the book are a rearrangement of the Systematic Theology which attempts to present the content in a form more suitable than Tillich’s own method of correlation. Chapter five tries to identify the basic elements that actually, though not explicitly, structure the system as indicated in the outline of his thesis above. In the final chapter, Mahan concludes that the phenomenon of the holy marked by its "dialectic of the destruction and rebirth of the spirit" is the basic motif of the reformulated system and really the source of Tillich’s ultimate optimism. And so he seeks to salvage success for Tillich’s thought precisely because his vision of the sacral quality in all life is too great for his system to embrace. (shrink)