PMD fundamentals: Polarization mode dispersion in optical fibers

This paper reviews the fundamental concepts and basic theory of polarization mode dispersion (PMD) in optical fibers. It introduces a unified notation and methodology to link the various views and concepts in Jones space and Stokes space. The discussion includes the relation between Jones vectors and Stokes vectors, rotation matrices, the definition and representation of PMD vectors, the laws of infinitesimal rotation, and the rules for PMD vector concatenation.

Recognition of online handwritten music symbols

Paper submitted to MML 2013, 6th International Workshop on Machine Learning and Music, Prague, September 23, 2013.

A formal framework for modelling complex network management systems

Society today is completely dependent on computer networks, the Internet and distributed systems, which place at our disposal the necessary services to perform our daily tasks. Subconsciously, we rely increasingly on network management systems. These systems allow us to, in general, maintain, manage, configure, scale, adapt, modify, edit, protect, and enhance the main distributed systems. Their role is secondary and is unknown and transparent to the users. They provide the necessary support to maintain the distributed systems whose services we use every day. If we do not consider network management systems during the development stage of distributed systems, then there could be serious consequences or even total failures in the development of the distributed system. It is necessary, therefore, to consider the management of the systems within the design of the distributed systems and to systematise their design to minimise the impact of network management in distributed systems projects. In this paper, we present a framework that allows the design of network management systems systematically. To accomplish this goal, formal modelling tools are used for modelling different views sequentially proposed of the same problem. These views cover all the aspects that are involved in the system; based on process definitions for identifying responsible and defining the involved agents to propose the deployment in a distributed architecture that is both feasible and appropriate.

Exact Numerical Processing

Paper submitted to Euromicro Symposium on Digital Systems Design (DSD), Belek-Antalya, Turkey, 2003.

Conceptual Modelling of Complex Network Management Systems

Society, as we know it today, is completely dependent on computer networks, Internet and distributed systems, which place at our disposal the necessary services to perform our daily tasks. Moreover, and unconsciously, all services and distributed systems require network management systems. These systems allow us to, in general, maintain, manage, configure, scale, adapt, modify, edit, protect or improve the main distributed systems. Their role is secondary and is unknown and transparent to the users. They provide the necessary support to maintain the distributed systems whose services we use every day. If we don’t consider network management systems during the development stage of main distributed systems, then there could be serious consequences or even total failures in the development of the distributed systems. It is necessary, therefore, to consider the management of the systems within the design of distributed systems and systematize their conception to minimize the impact of the management of networks within the project of distributed systems. In this paper, we present a formalization method of the conceptual modelling for design of a network management system through the use of formal modelling tools, thus allowing from the definition of processes to identify those responsible for these. Finally we will propose a use case to design a conceptual model intrusion detection system in network.

L' Europe galante: ballet : représenté en l'an 1697 par l'Academie royale de musique

de la composition de Monsieur Campra, maître de musique de la chapelle du Roy ; les paroles de cette piece sont de Monsieur de La Motte, de l'Academie françoise.

List of books received, October 1, 1766

Notation indicates that books were transported by a Captain Marshall.

List of books received, Aug. 17, 1765

Notation reads: "Catalogue of Books sent by Mr. Hollis in [by?] Capt. Blake, wch he calls an Addition to his Driblet."

Notebook containing Nathan Prince's defense against the first articles of accusation against him, Nov. 26, 1741

A penciled notation on this notebook's cover indicates that the handwriting is of Thomas Prince, Nathan's brother. Informally titled "An Heavenly Interposition of a Storm & Tempest," this notebook details Prince's point-by-point responses to the accusations against him. Prince also includes lists of each accusation and those making the accusation; he appears to have believed there was a conspiracy against him.

List of books donated by Simon Bradstreet, undated

Notation made at end of list: "Entered in the General Catalogue, and the Books designed for the undergraduates are marked thus (a)."

Questiones propositae pro modulo discutiendae Comitiis publicis Harvardini Collegii quod est divin. provid. Cantabrigiae Nov-Anglorum a Laureae Magistralis candidatis, 1660-1753

The bound volume holds handwritten transcriptions of selected Harvard Commencement Quaestiones copied by Isaac Mansfield (Harvard AB 1742). The manuscript volume includes from the 1708 Quaestiones onward, the notation "N.B." next to questions performed by the candidate during the Commencement exercises; the original printed Quaestiones sheets do not note this information. The volume includes Quaestiones transcriptions for which no original broadsides are known to still exists.

Commonplace book of John Bullard, 1775-1779

This bound volume contains excerpts copied by Jonathan Bullard from books he read as a student at Harvard in the mid 1770s. Excerpts include an unattributed poem titled "On Friendship," which appeared in the "poetical essays" section of Volume 36 of the London Magazine in 1767; Joseph Butler, The Analogy of Religion, 1736; The Quaker's Grace; a history of England; Newton's laws; Plutarch's Morals; Benjamin Franklin's writings on the Aurora Borealis. The volume also includes several extracts from articles about the death of John Paddock (Class of 1776), who drowned in the Charles in the summer of 1773, sheet music for two songs, "The Rapture," and "A Song" from Henry Harington's "Damon and Chlora," and a transcription of the satirical "Book of Harvard," written in response to the Butter Rebellion of 1766. Interleaved in the middle of the volume is a transcription from an ecclesiastical event moderated by Ebenezer Bridge in Medford, Mass. on November 20, 1779. The variety of texts suggests the commonplace book was not used solely for academic works.

Bill of disbursments [for the] sch[oone]r Lydia : manuscript, 1790

List of ship's expenses between Feb. 7 and May 25; dated at Aux Cayes, (Haiti) May 27, 1790; includes money paid to an interpreter at Tobago, workers for ship maintenance, and various harbor officials; and notation of purchases for goods such as sugar, coffee, rice, tar, food, and rum.

Sermons : manuscript, 1709-1722

64 sermons on verses from John, Proverbs, Revelations, Matthew, and other books of the Bible, with notation of dates and places delivered in and around Boston.

Post Route Map of New York, 1871 (Image 1 of 2) (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Post route map of the state of New York : and parts of Vermont, Massachusetts, Connecticut, New Jersey and Pennsylvania, showing also the adjacent portions of the dominion of Canada, designed and constructed under the orders of Postmaster General, Alex. W. Randall, and second asst. Postmaster General, Geo. Wm. McLellan, by W.L. Nicholson, topographer of P.O. Dept. It was published by U.S. Post Office Dept. in 1868. Ink notation: "The service on this diagram brought up to date of Jan. 1st, 1871." Scale [1:380,160]. This layer is image 1 of 2 total images of the two sheet source map. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Universal Transverse Mercator (UTM) Zone 18N NAD83 projection. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as roads, railroads, postal routes (with delivery schedule frequency and distances), drainage, cities and towns, counties, and more. Includes insets: Postal service of Long Island with the principal mail connections of the city of New York. Scale [1:380,160] -- [Parts of the provinces of Québec and Ontario bordering New York and Vermont]. Includes tables of distances and statistics. This layer is part of a selection of digitally scanned and georeferenced historic maps from The Harvard Map Collection as part of the Imaging the Urban Environment project. Maps selected for this project represent major urban areas and cities of the world, at various time periods. These maps typically portray both natural and manmade features at a large scale. The selection represents a range of regions, originators, ground condition dates, scales, and purposes.