The Future of the Sahara

1993 ◽  
Vol 20 (4) ◽  
pp. 335-338 ◽  
Author(s):  
John L. Cloudsley-Thompson

Long-term climatic variations over the past 400,000 years, disclose a cyclical alternation of cold or glacial phases. At the present time, the world is experiencing one of its warmer climatic periods. Nevertheless, summer insolation has decreased sharply during the last 9,000 years and, apart from human influences, a gradual reduction in temperature might well be expected to occur during the next 50,000 years. On the other hand, if the human-induced ‘greenhouse effect’ manifests itself as is sometimes forecast, climatic changes will take place much faster, and temperatures could reach higher levels than in any of the post-Pleistocene interglacial phases. The future of the Sahara depends to a considerable extent upon which of these trends actually manifests itself.

KronoScope ◽  
2004 ◽  
Vol 4 (2) ◽  
pp. 297-315 ◽  
Author(s):  
Barbara Adam

AbstractWe think of memories as being focused on the past. However, our ability to move freely in the temporal realm of past, present and future is far more complex and sophisticated than commonsense would suggest. In this paper I am concerned with our capacity to produce and extend ourselves into the far future, for example through nuclear power or the genetic modification of food, on the one hand, and our inability to know the potential, diverse and multiple outcomes of this technologically constituted futurity, on the other. I focus on this discrepancy in order to explore what conceptual tools are available to us to take account of long-term futures produced by the industrial way of life. And I identify some historical approaches to the future on the assumption that the past may well hold vital clues for today's dilemma, hence my proposal to engage in 'memory of futures'. I conclude by considering the potential of 'memory aids for the future' as a means to better encompass in contemporary concerns the long-term futures of our making.


2021 ◽  
Vol V (1) ◽  
pp. 159-165
Author(s):  
Elena Smirennikova

The article deals with a fragment of a lecture by V.V. Bibikhin, in which eternity is interpreted as a constant renewal, the young-new. The new present, the “now”, makes the preceding present different, thereby turning it into the past. This "now" does not exist in the way of being and is recognized only as the boundary between the past and the future. But it touches us, captures us. The new can't be planned, it can only be allowed, let be. The allowing is a risk, because the unknown will always fall out, something that you cannot prepare beforehand, prepare a way to deal with it. However, in the new we always recognize the same thing. Also to be ready for the new is to be ready for the generosity of being, which gives more and more. Being gives space and time to appear. The non-appeared, the different, seems to us separated with a line, a boundary. And we imagine eternity as something being abroad, beyond the line of time. But for Bibikhin, this is a meeting with the boundary itself, which is different both to what is located on one side of the boundary and to what is on the other. Eternity is not there, “beyond the line”, but here and now: it exists by its absence. Absolutely different, boundary, line, eternity — not just different, but is different, new each time. That is why Bibikhin's eternity is the young-new itself.


Author(s):  
James A. Anderson

Hand axes, language, and computers are tools that increase our ability to deal with the world. Computing is a cognitive tool and comes in several kinds: digital, analog, and brain-like. An analog telephone connects two telephones with a wire. Talking causes a current to flow on the wire. In a digital telephone the voltage is converted into groups of ones or zeros and sent at high speed from one telephone to the other. An analog telephone requires one simple step. A digital telephone requires several million discrete steps per second. Digital telephones work because the hardware has gotten much faster. Yet brains constructed of slow devices and using a few watts of power are competitive for many cognitive tasks. The important question is not why machines are becoming so smart but why humans are still so good. Artificial intelligence is missing something important probably based on hardware differences.


1987 ◽  
Vol 29 (3) ◽  
pp. 566-593 ◽  
Author(s):  
Nancy M. Farriss

This essay is about concepts of time and the past among the Maya Indians of Yucatan in southeastern Mexico. It explores how these concepts fit into the Maya's general view of the way the world works and how they relate to certain dynamics of Maya history—as we define history—during their pre-Hispanic and colonial past. One inspiration has been the often baffling written records the Maya have left, from which we try to quarry historical facts without always enquiring what the records meant to the people who produced them. The other is the reminder, provided by recent historical work from anthropologists, that people do not record their past so much as construct it, with an eye to the present, and at the same time use that past in molding the present.


2020 ◽  
pp. 001946622096802
Author(s):  
Sarbajit Sengupta

This article attempts to construct an extremely rudimentary framework to argue that the long-term losses from the pandemic shock are likely to far exceed the short-term one. In the simple structure presented here, output depends on labour force, efficiency that is determined by past nutrition levels and capital accumulated from the past. The immediate effect of the pandemic is to lower the effective labour size, principally due to lockdowns to prevent or delay the spread of the pandemic. The other two factors cannot be affected. However, the decline in present output is likely to lower both the efficiency of labour and the future capital along with the labour supply in the future, thereby causing a greater impact on future output.


Author(s):  
Joan-Carles Mélich

The aim of this work settles on describing, through the fenomenological methodology, the structure and dinamics of the moral conscience and its function in the educational process. The moral conscience, equally than the epistemologica! moral, is endowed of a temporary structure. Time, through its three dimensions (past, present, and future) allows the dialectics of the moral conscience. In the past the values are settled, in the present takes place the hermeneutics of reality, and in the future make an irruption the duty and the project. In the second part of this article, the author gets the moral conscience with the educational conscience together (in touch). Both are not identic, one cannot be reduced to the other. The main (basic) diference settles on the «technical question (matter)». Hence the educational conscience does not limit itself; like the moral one, to a hermeneutics of the present, but moreover it provokes and endeavours an «intervention» of the present, that is to say, a modification of the world.


Author(s):  
Paul Lauter

Zora Neale Hurston, the black writer and anthropologist, liked to tell a story about how she was arrested for crossing against a red light. But, she laughed, she had gotten off. “I told the policeman,” she would say, “that I had seen white folks pass on the green and so assumed the red light was for me.” That story has always held a particular appeal to me, since my father was color blind and could not tell red from green. He knew them apart in traffic lights, he once told me, only because one was always on top and the other on bottom. signs, particularly: Which are on top and which on bottom; which command you to stop, and which invite you to proceed, and how that might differ, depending who “you” are. After all, schools, whatever else they do, help establish and transmit our society’s cultural signals, those determinative red and green lights. Indeed, one way of understanding the curriculum is as an elaborate set of signals directing students onto the various tracks they will likely follow throughout their lives. However that might be, it is certainly true that educational institutions always seem to be caught between two prepositions, “in” and “to.” Part of our mission is to instruct students in various disciplines, in history, in literature, in physics. But at the same time, we are expected to orient students to the world outside the classroom, to its creation and recreation in the work they will perform and the ideas they will evolve. find a tension in these prepositions between the voices of the past and the visions of the future. The dilemma may seem familiar, yet another chapter in the honored debate between the Ancients and the Moderns, between those who say “set the students’ eyes firmly upon the ‘monuments of unaging intellect,’ “ and those who say “educere, lead them forth, help them dream, let their ‘thought be mother to the deed.’ ”


1996 ◽  
Vol 22 ◽  
pp. 345-363
Author(s):  
Andrew Levine

Until quite recently, political philosophers routinely ignored nationalism. Nowadays, the topic is very much on the philosophical agenda. In the past, when philosophers did discuss nationalism, it was usually to denigrate it. Today, nationalism elicits generally favorable treatment. I confess to a deep ambivalence about this turn of events. On the one hand, much of what has emerged in recent work on nationalism appears to be on the mark. On the other hand, the anti- or extra-nationalist outlook that used to pervade political philosophy seems as sound today as it ever was, and perhaps even more urgent in the face of truly horrendous eruptions of nationalist hostilities in many parts of the world. What follows is an effort to grapple with this ambivalence. My aim will be to identify what is defensible in the nationalist idea and then to reflect on the flaws inherent in even the most defensible aspects of nationalist theory and practice.


The Eye ◽  
2019 ◽  
Vol 21 (128) ◽  
pp. 19-22
Author(s):  
Gregory DeNaeyer

The world-wide use of scleral contact lenses has dramatically increased over the past 10 year and has changed the way that we manage patients with corneal irregularity. Successfully fitting them can be challenging especially for eyes that have significant asymmetries of the cornea or sclera. The future of scleral lens fitting is utilizing corneo-scleral topography to accurately measure the anterior ocular surface and then using software to design lenses that identically match the scleral surface and evenly vault the cornea. This process allows the practitioner to efficiently fit a customized scleral lens that successfully provides the patient with comfortable wear and improved vision.


2010 ◽  
Vol 51 (1-2) ◽  
pp. 215-224
Author(s):  
Alexander Carpenter

This paper explores Arnold Schoenberg’s curious ambivalence towards Haydn. Schoenberg recognized Haydn as an important figure in the German serious music tradition, but never closely examined or clearly articulated Haydn’s influence and import on his own musical style and ethos, as he did with many other major composers. This paper argues that Schoenberg failed to explicitly recognize Haydn as a major influence because he saw Haydn as he saw himself, namely as a somewhat ungainly, paradoxical figure, with one foot in the past and one in the future. In his voluminous writings on music, Haydn is mentioned by Schoenberg far less frequently than Bach, Mozart, or Beethoven, and his music appears rarely as examples in Schoenberg’s theoretical texts. When Schoenberg does talk about Haydn’s music, he invokes — with tacit negativity — its accessibility, counterpoising it with more recondite music, such as Beethoven’s, or his own. On the other hand, Schoenberg also praises Haydn for his complex, irregular phrasing and harmonic exploration. Haydn thus appears in Schoenberg’s writings as a figure invested with ambivalence: a key member of the First Viennese triumvirate, but at the same time he is curiously phantasmal, and is accorded a peripheral place in Schoenberg’s version of the canon and his own musical genealogy.


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