The Presentation of the Fixing Accuracy of Navigation Systems

1948 ◽  
Vol 1 (4) ◽  
pp. 313-337 ◽  
Author(s):  
G. H. Trow ◽  
A. H. Jessell
Keyword(s):  
Hyperbolic Systems ◽  
Graphical Methods ◽  
Navigation Systems ◽  
General Picture ◽  
Radial Error ◽  
Detailed Picture ◽  
The Way

AbstractThe paper discusses the way in which the accuracy provided by different navigation systems can best be presented diagrammatically, and it is concluded that contours of constant 95% radial error give the best general picture of a system. Where a more detailed picture is required error ellipses can be added at suitable points in the system. The 95% radial error of fixing is calculated for radial, rθ, azimuthal and different hyperbolic systems, and graphical methods are developed for drawing contours along which the 95% error is constant, and also for drawing 95% ellipses. Diagrams show typical results for the different systems.

Periphrasis in Tundra Nenets1

Periphrasis ◽  
2012 ◽  
Author(s):  
Irina Nikolaeva
Keyword(s):  
Number System ◽  
Dual Form ◽  
Intransitive Verbs ◽  
Detailed Picture ◽  
Rare Instance ◽  
The Way

A detailed picture of periphrasis in Nenets (Uralic) presents a typologically rare instance of periphrasis in a nominal paradigm (as opposed to more familiar verbal periphrasis). Previous accounts treated Nenets nouns as an uncontroversial example of periphrasis, but this chapter demonstrates that a closer look reveals a more complicated picture. It argues that the choice between the usage of the periphrastic dual form and the numeral ‘two’ (which takes the singular) correlates with definiteness and/or discourse givenness. In addition, analysis of this rare instance of periphrasis in a noun system reveals interesting aspects of the way the number system works in the language. The chapter also investigates the periphrastic realization of verbal negation, where the auxiliary carries the information of the verb type. For intransitive verbs, the type is either ‘subjective’ or ‘reflexive’ and there are, surprisingly, arguments in favour of treating these as purely morphological classes.

scholarly journals Retrieving Landmark Salience Based on Wikipedia: An Integrated Ranking Model

2019 ◽  
Vol 8 (12) ◽  
pp. 529
Author(s):  
Noa Binski ◽  
Asya Natapov ◽  
Sagi Dalyot
Keyword(s):  
User Experience ◽  
Public Interest ◽  
Navigation Systems ◽  
Numerical Attributes ◽  
Ranking Model ◽  
Geographic Sources ◽  
Landmark Salience ◽  
The Way

Landmarks are important for assisting in wayfinding and navigation and for enriching user experience. Although many user-generated geotagged sources exist, landmark entities are still mostly retrieved from authoritative geographic sources. Wikipedia, the world’s largest free encyclopedia, stores geotagged information on many geospatial entities, including a very large and well-founded volume of landmark information. However, not all Wikipedia geotagged landmark entities can be considered valuable and instructive. This research introduces an integrated ranking model for mining landmarks from Wikipedia predicated on estimating and weighting their salience. Other than location, the model is based on the entries’ category and attributed data. Preliminary ranking is formulated on the basis of three spatial descriptors associated with landmark salience, namely permanence, visibility, and uniqueness. This ranking is integrated with a score derived from a set of numerical attributes that are associated with public interest in the Wikipedia page―including the number of redirects and the date of the latest edit. The methodology is comparatively evaluated for various areas in different cities. Results show that the developed integrated ranking model is robust in identifying landmark salience, paving the way for incorporation of Wikipedia’s content into navigation systems.

Development in Airborne Navigation Systems

1971 ◽  
Vol 24 (3) ◽  
pp. 392-412
Author(s):  
W. O. Broughton ◽  
J. W. McIvor
Keyword(s):  
World War Ii ◽  
Civil Aviation ◽  
Navigation Systems ◽  
World War ◽  
Aircraft Navigation ◽  
The Future ◽  
The Way

This paper covers aircraft navigation with emphasis upon self-contained systems, although a survey of the scene cannot avoid reference to external aids. It traces briefly the evolution of self-contained systems since World War II to the present time and then attempts to forecast the way development appears likely to go in the future. The paper deals with both military and civil aviation because, in spite of the increasing importance of the latter, military navigation, as ever, leads the way to improvements for the future.

scholarly journals An apple a day …

2019 ◽  
Vol 124 (1) ◽  
pp. 171-218 ◽  
Author(s):  
David Stifter
Keyword(s):  
Old Irish ◽  
General Picture ◽  
The Way

Zusammenfassung This article presents hitherto overlooked evidence that suggests that the Old Irish word for the ‘apple’, ubull, was originally a neuter u-stem. This is then integrated into a general picture of the words for ‘apple’ in Celtic and Indo-European. Along the way, several other problems are discussed: it is demonstrated that the normal, if not regular, genitive plural of neuter u-stems in Old Irish had the ending -Ø; the rules for the operation of MacNeill’s Law after b /β/ are refined; and the question of the regular reflex of *su̯ in Old Irish is investigated.

The Matrioshka Principle and Its Discontents

2018 ◽  
pp. 67-93
Author(s):  
Zoltán Biedermann
Keyword(s):  
South India ◽  
Regional Conflict ◽  
Detailed Picture ◽  
The Way

Chapter 3 explains on what grounds Lankan rulers remained committed to the idea of co-opting the Portuguese through tributary diplomacy, against the backdrop of a growing regional conflict involving the Muslim Mappilas of South India. Negotiations culminated in 1542 with the reception in Lisbon of an embassy sent by king Bhuvanekabāhu VII of Kōṭṭe to John III of Portugal. In addition to a magnificent ivory casket, significant archival materials survive today to give us a detailed picture of how the inter-imperial deal was imagined in the Lankan capital along the lines of the principle of nesting empires, the ‘Matrioshka principle’. These papers also show the limitations of the conversation. A picture emerges that is at once astounding in the way it contains two very different but commensurable imperial models, and ominous in the way these two models do not quite talk to each other in the way the elite of Kōṭṭe expected.

Meat Supplies

1945 ◽  
Vol 1945 (01) ◽  
pp. 5-19
Author(s):  
Major W. H. Warman
Keyword(s):  
Detailed Examination ◽  
General Picture ◽  
The Way

The time has not yet come when the absorbing story can be told of the way in which our oversea supplies of meat have come to us during the war. The Board of Trade for obvious reasons does not yet release particulars of its imports, so that I am severely limited in my remarks on world supplies. Yet the general picture is clear and will perhaps serve as a background for some more detailed examination of our home supplies.

Lane-Level Positioning Method for 3D In-Vehicle Navigation System

2013 ◽  
Vol 340 ◽  
pp. 767-772
Author(s):  
Lin Zhang ◽  
Bin Wang ◽  
Xue Yu Mi ◽  
Li Fen Yi
Keyword(s):  
Navigation System ◽  
Vehicle Navigation ◽  
Navigation Systems ◽  
Route Guidance ◽  
Map Matching ◽  
Differential Gps ◽  
Vehicle Navigation System ◽  
Detection Technology ◽  
Positioning Method ◽  
The Way

The objective of this study is to find an effective way to realize lane-level route guidance for vehicle navigation system. Based on the modeling of 3D map, a lane-level positioning method was presented by the way of combination of virtual differential GPS, height aiding, and collision detecting technique. GPS parameters were amended through virtual differential technology and height aiding technology by the way of elevation interpolation and least squares estimation in order to improve the output precision. Then a method of lane-level map matching was implemented in 3D digital map based on the collision detection technology. Tested by RTK technique, the method was proven to fulfill the demands of vehicle navigation systems.

The wartime work of Hinshelwood and his colleagues

2004 ◽  
Vol 58 (2) ◽  
pp. 161-175 ◽  
Author(s):  
J. S. Rowlinson
Keyword(s):  
World War Ii ◽  
World War ◽  
Inorganic Chemical ◽  
Detailed Picture ◽  
Extramural Research ◽  
The Way

C. N. Hinshelwood and his physical and inorganic chemical colleagues in Oxford worked throughout World War II on the improvement of charcoal for use in respirators and on other physicochemical problems. The surviving reports and correspondence give a detailed picture of what they accomplished and on the way in which extramural research contracts were then handled.

scholarly journals Aspects of Tracking in the Schools as a Factor of Risk and Exclusion of Students

2020 ◽  
pp. 405-424
Author(s):  
Lili Israel
Keyword(s):  
Social Policy ◽  
Educational Policy ◽  
The State ◽  
Israeli Society ◽  
Dropping Out ◽  
General Picture ◽  
The Relationship ◽  
State Of Israel ◽  
The Way ◽  
Research Studies

The tracking of students in the schools is a topic that obligates social and educational reference. This is a fieldthat exposes gaps and contradictions regarding the possibilities and intentions of parts of Israeli society. It is difficultto definewho is being talked about. In addition, it is difficultto separate between or limit the reference to the single student as a real and feeling subject and the desire of the system for a child as a product of education. It is difficultto describe a general picture without forgetting the individuals in it, the students, when the relationship between the tracking, the dropping out, and the exclusion is unavoidable.This article is an attempt to examine the argument presented in research studies that the gaps between different groups in the population derive from the policy of tracking in education from the establishment of the State of Israel until today and that this policy is intentional. The way that the school as an organization acts and the topics with which it copes can be explained in social policy and in the sociological rationale that characterizes society in Israel.Which social and educational policy serves the tracking of students and why, despite the data and the numbers that indicate a large gap, is the topic of tracking not present in the educational discussion? I seek to assert that research in the field is insufficient and thait is necessary to place the topic on the agenda and conduct an educational discussion.

The Punishment of Amalek in Jewish Tradition: Coping with the Moral Problem

1994 ◽  
Vol 87 (3) ◽  
pp. 323-346 ◽  
Author(s):  
Avi Sagi
Keyword(s):  
Jewish Tradition ◽  
Moral Problem ◽  
The Bible ◽  
Detailed Picture ◽  
The Way

The story of Amalek's deed occurs twice in the Bible: in Exod 17:8–16 and in Deut 25:17–19. The account in Exodus is quite succinct: “Then came Amalek and fought with Israel in Refidim” (Exod 17:8); in contrast, the description in Deuteronomy paints a broader and more detailed picture: “Remember what Amalek did to thee by the way, when you were come out of Egypt: how he met thee by the way, and smote the hindmost of thee, all that were feeble in thy rear, when thou wast faint and weary; and he feared not God” (Deut 25:17–18). The Exodus version, although sparing in its description of the particulars, offers the more dramatic account of the war between Israel and Amalek.

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