Navigational Almanacs for small Computers and Calculators

1979 ◽  
Vol 32 (1) ◽  
pp. 17-24
Author(s):  
D. H. Sadler

In 1947 Dr G. M. Clemence, then Director of the Nautical Almanac Office at the US Naval Observatory, and I visited a number of US institutions engaged in the development of digital computing machines, with a view to their application to the calculation of astronomical ephemerides. We were, at that time, planning the revision of the almanacs for surface navigation which led, in due course, to the unification of The American Nautical Almanac and The Nautical Almanac, Abridged for the Use of Seamen in essentially its present form as (from 1960 onwards) The Nautical Almanac. We were told (actually by an astronomer, Dr T. E. Sterne) that our efforts were pointless since, in the near future, a navigator would be able to calculate the astronomical data that he required to reduce his observations by digital computer; conventional almanacs would no longer be needed. Thirty years later that optimistic forecast, although not yet realized, requires consideration. However, no one could have foreseen that the microprocessor of today is far more powerful than the most elaborate computer that was then practically visualized. For that matter, few would have thought that there would still have been a demand for astronomical data for navigation; the basic principles of many other aids to navigation were rapidly being developed.

1966 ◽  
Vol 24 ◽  
pp. 116-117
Author(s):  
P.-I. Eriksson

Nowadays more and more of the reductions of astronomical data are made with electronic computers. As we in Uppsala have an IBM 1620 at the University, we have taken it to our help with reductions of spectrophotometric data. Here I will briefly explain how we use it now and how we want to use it in the near future.


2004 ◽  
Vol 2 (2) ◽  
pp. 163-187
Author(s):  
Donald E. Wagner

It is a common assumption in the international media that the fundamentalist Christian Right suddenly appeared on the US political scene following the 11 September 2001 tragedy, and that it became a major force in shaping US policy in the Middle East. While it is true that fundamentalist Christians have exercised considerable influence during the George W. Bush administration, their ascendance is neither new nor surprising. The movement has demonstrated political influence in the US and England intermittently for more than a hundred years, particularly in the formation of Middle East policy. This article focuses on the unique theology and historical development of Christian Zionism, noting its essential beliefs, its emergence in England during the nineteenth century, and how it grew to gain prominence in the US. The alliance of the pro-Israel lobby, the neo-conservative movement, and several Christian Zionist organizations in the US represents a formidable source of support for the more maximalist views of Israel's Likud Party. In the run-up to the 2004 US presidential elections this alliance could potentially thwart any progress on an Israeli–Palestinian peace plan in the near future. Moreover, Likud ideology is increasingly evident in US Middle East policy as a result of this alliance.


Robotica ◽  
2016 ◽  
Vol 35 (5) ◽  
pp. 1176-1191
Author(s):  
Dugan Um ◽  
Dongseok Ryu

SUMMARYAs various robots are anticipated to coexist with humans in the near future, safe manipulation in unknown, cluttered environments becomes an important issue. Manipulation in an unknown environment, however, has been proven to be NP-Hard and the risk of unexpected human--robot collision hampers the dawning of the era of human--robot coexistence. We propose a non-contact-based sensitive skin as a means to provide safe manipulation hardware and interleaving planning between the workspace and the configuration space as software to solve manipulation problems in unknown, crowded environments. Novelty of the paper resides in demonstration of real time and yet complete path planning in an uncertain and crowded environment. To that end, we introduce the framework of the sensor-based interleaving planner (SBIP) whereby search completeness and safe manipulation are both guaranteed in cluttered environments. We study an interleaving mechanism between sensation in a workspace and execution in the corresponding configuration space for real-time planning in uncertain environments, thus the name interleaving planner implies.Applications of the proposed system include manipulators of a humanoid robot, surgical manipulators, and robotic manipulators working in hazardous and uncertain environments such as underwater, unexplored planets, and unstructured indoor spaces.


2004 ◽  
Vol 127 (1) ◽  
pp. 539-548 ◽  
Author(s):  
Brian D. Mason ◽  
William I. Hartkopf ◽  
Gary L. Wycoff ◽  
Dan Pascu ◽  
Sean E. Urban ◽  
...  

Author(s):  
Kau-Fui Vincent Wong ◽  
Guillermo Amador

As society continues advancing into the future, more energy is required to supply the increasing population and energy demands. Unfortunately, traditional forms of energy production through the burning of carbon-based fuels are dumping harmful pollutants into the environment, resulting in detrimental, and possibly irreversible, effects on our planet. The burning of coal and fossil fuels provides energy at the least monetary cost for countries like the US, but the price being paid through their negative impact of our atmosphere is difficult to quantify. A rapid shift to clean, alternative energy sources is critical in order to reduce the amount of greenhouse gas emissions. For alternative energy sources to replace traditional energy sources that produce greenhouse gases, they must be capable of providing energy at equal or greater rates and efficiencies, while still functioning at competitive prices. The main factors hindering the pursuit of alternative sources are their high initial costs and, for some, intermittency. The creation of electrical energy from natural sources like wind, water, and solar is very desirable since it produces no greenhouse gases and makes use of renewable sources—unlike fossil fuels. However, the planning and technology required to tap into these sources and transfer energy at the rate and consistency needed to supply our society comes at a higher price than traditional methods. These high costs are a result of the large-scale implementation of the state-of-the-art technologies behind the devices required for energy cultivation and delivery from these unorthodox sources. On the other hand, as fossil fuel sources become scarcer, the rising fuel costs drive overall costs up and make traditional methods less cost effective. The growing scarcity of fossil fuels and resulting pollutants stimulate the necessity to transition away from traditional energy production methods. Currently, the most common alternative energy technologies are solar photovoltaics (PVs), concentrated solar power (CSP), wind, hydroelectric, geothermal, tidal, wave, and nuclear. Because of government intervention in countries like the US and the absence of the need to restructure the electricity transmission system (due to the similarity in geographical requirements and consistency in power outputs for nuclear and traditional plants), nuclear energy is the most cost competitive energy technology that does not produce greenhouse gases. Through the proper use of nuclear fission electricity at high efficiencies could be produced without polluting our atmosphere. However, the initial capital required to erect nuclear plants dictates a higher cost over traditional methods. Therefore, the government is providing help with the high initial costs through loan guarantees, in order to stimulate the growth of low-emission energy production. This paper analyzes the proposal for the use of nuclear power as an intermediate step before an eventual transition to greater dependence on energy from wind, water, and solar (WWS) sources. Complete dependence on WWS cannot be achieved in the near future, within 20 years, because of the unavoidable variability of these sources and the required overhaul of the electricity transmission system. Therefore, we look to nuclear power in the time being to help provide predictable power as a means to reduce carbon emissions, while the other technologies are refined and gradually implemented in order to meet energy demand on a consistent basis.


2007 ◽  
Vol 134 (4) ◽  
pp. 1671-1678 ◽  
Author(s):  
Brian D. Mason ◽  
William I. Hartkopf ◽  
Gary L. Wycoff ◽  
Gary Wieder

2020 ◽  
Vol 12 (1) ◽  
pp. 42-55 ◽  
Author(s):  
Imad A. Moosa

The current trade war between the USA and China is perceived to be motivated by the US desire to curtail the bilateral trade deficit, on the assumption that reducing the deficit boosts economic growth. This flawed proposition indicates gross misunderstanding of the national income identity and the basic principles of macroeconomics. The imposition of tariffs will not reduce the trade deficit as the assumptions and conditions required for a smooth working of the process are unrealistic and counterfactual. The notion of an economic Thucydides trap is put forward to explain why the trade war is motivated by US apprehension about China’s rising economic power.


1997 ◽  
Vol 111 (1) ◽  
pp. 289-334 ◽  
Author(s):  
Geoffrey G. Douglass ◽  
Robert B. Hindsley ◽  
Charles E. Worley

Author(s):  
John B. Meisel ◽  
John Navin ◽  
Timothy S. Sullivan

The American Recovery and Reinvestment Act of 2009 charged the US Federal Communications Commission (FCC) to develop and deliver to Congress a national broadband plan by February 17, 2010. The FCC formally commenced the process of developing the plan by issuing a Notice of Inquiry (NOI) on April 8, 2009. The NOI identified broadband issues and critical questions and asked stakeholders to respond to these issues and questions with data and analysis. The purpose of this chapter is to analyze the written documents generated by stakeholders’ responses concerning the specific issues of open networks and competition and to make recommendations to the FCC in its formulation of federal policy as to the position that makes the most economic sense on these issues. We find that many of the arguments and concerns of stakeholders are dependent upon predictions regarding the competitiveness of ISP markets. We predict with confidence that technological innovations are likely to make many legal arguments (on all sides) obsolete in the near future.


Head Strong ◽  
2020 ◽  
pp. 78-98
Author(s):  
Michael D. Matthews

Budgetary constraints and emerging advances in weapons technology have resulted in a substantial reduction in the sizes of contemporary military forces. The US Army, at less than 500,000 soldiers, is a fraction of its size of a generation ago, yet the demands for it to deploy in a variety of missions around the globe have only increased. This chapter reviews current and emerging strategies that may aid in optimizing soldier performance. Developments in human physiology, genetics, nutrition, neurotechnology, sleep, noncognitive amplifiers, and leader development are described. Currently available strategies are identified, as are approaches to human performance optimization that are likely to emerge in the near future. Extrapolations of human performance optimization protocols to other contexts beyond the military are considered.


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