3,582 research outputs found
Results on Parity-Check Matrices With Optimal Stopping And/Or Dead-End Set Enumerators
No full textThe performance of iterative decoding techniques for linear block codes correcting erasures depends very much on the sizes of the stopping sets associated with the underlying Tanner graph, or, equivalently, the parity-check matrix representing the code. In this correspondence, we introduce the notion of dead-end sets to explicitly demonstrate this dependency. The choice of the parity-check matrix entails a tradeoff between performance and complexity. We give bounds on the complexity of iterative decoders achieving optimal performance in terms of the sizes of the underlying parity-check matrices. Further, we fully characterize codes for which the optimal stopping set enumerator equals the weight enumerator.TelecommunicationsElectrical Engineering, Mathematics and Computer Scienc
Revelations. The epistle of Nathan the Wise ...
No full textAttributed to J.H. Donlevy by whom copyright was secured.Cover-title.Mode of access: Internet
Fradulent or Bogus Check for Mrs. Frank Marshal.
No full textGeorge Kimmel: Description: 30 years of age, 5 feet 8 inches high, weight 155 pounds, medium complexion, brown hair and mustache. Wore when last seen light brown suit of clothes, straight brim straw hat, Knight Templar's Charm, heavy band gold ring, double eagle and small diamond in center, emblem of 32d degree Mason.
Mrs. Frank Marshal: She is described as bring about 30 years of age, hair bleached, complexion rather coarse, partly sallow, black eyebrows, dark eyes, has two or three teeth out on the right side of mouth, rather delicate in appearance. Claims her husband is Treasurer for Weber and Fields Show. She is well acquainted with Theatrical people and managers.Mrs. Frank Marshal: She is described as bring about 30 years of age, hair bleached, complexion rather coarse, partly sallow, black eyebrows, dark eyes, has two or three teeth out on the right side of mouth, rather delicate in appearance. Claims her husband is Treasurer for Weber and Fields Show. She is well acquainted with Theatrical people and managers.George Kimmel: Five hundred dollars reward is offered by Chas. A. Johnson, banker at Niles, Mich., for information leading to the discovery of his whereabouts and placing him in the hands of his friends. He was last seen in Kansas City, Mo., on Saturday, July 30th, 1898, at the Midland Hotel, about 7:15 p.m., where he received a package of money containing 100.00. Said check, made on the City National Bank of Norfolk Va., May 13th, 1902, signed J.H. Hendig. She obtained one Black Silk Shirt, silk Lining, had doubly rouffle and silk trimmings; one black silk coat, loose fitting box pleats, very loose sleeves, lined with silk; white Lace Collar. She will probably be wearing same. Kindly have diligent inquiries mad of all Managers of Theatrical Companies as she is well known throughout the South. If located arrest, hold and wire at once. F. Farnan, Acting Marshal of Police, Baltimore, MD. or A.J. Puphrey, Captain of Detectives, Baltimore, MD.Mrs. Frank Marshal: Fraudulent or bogus check. We hold warrant and indictment for Mrs. Frank Marshal, alias Everett, charged with obtaining merchandise to the amount of Forty-six dollars, and Fifty-four dollars in cash, in exchange for a fraudulent or bogus check for $100.00. Said check, made on the City National Bank of Norfolk Va., May 13th, 1902, signed J.H. Hendig. She obtained one Black Silk Shirt, silk Lining, had doubly rouffle and silk trimmings; one black silk coat, loose fitting box pleats, very loose sleeves, lined with silk; white Lace Collar. She will probably be wearing same. Kindly have diligent inquiries mad of all Managers of Theatrical Companies as she is well known throughout the South. If located arrest, hold and wire at once. F. Farnan, Acting Marshal of Police, Baltimore, MD. or A.J. Puphrey, Captain of Detectives, Baltimore, MD
Ghost sign for Duraflex Shoes on Grosvenor Street, 2024.
No full textGhost sign with severe deterioration. Based on other entries in our collection, this ghost sign previously advertised Duraflex Shoes, 'Shoes For Ladies'. In the background, there is a secondary ghost sign for Duraflex Shoes and 'J.H. Clarke & Co. Ltd' that was painted over between 2008 and 2012. For a closer look, check our collection
The Stopping Set Property and the Iterative Decoding Performance of Binary Block Codes on BSC and AWGN Channel
No full textIn the field of Error Correcting Coding (ECC), the concept of ''stopping set'' recently became a hot topic. A stopping set for a parity-check matrix is the set of bits which would cause the iterative decoding progress in Binary Erasure Channel (BEC) to ''stop'' when it is erased. It has already been proved in several papers that the decoding performance under iterative decoding algorithm of any linear block code in BEC is determined by their stopping set performance, in particular, their size and number. And it is commonly assumed by the coding researchers that those codes which have better stopping set performance would also perform better in other channels. In this thesis, the decoding performance of linear block codes, in particular, Hamming Codes, the original LDPC code proposed by Gallager and FG-LDPC codes is studied in Binary Symmetric Channel (BSC) and Additive White Gaussian Noise (AWGN) channel. Three iterative decoding algorithms, respectively Bit-Flipping algorithm, Weighted Bit-Flipping algorithm and Sum Product Algorithm are used. To emphasize the influence of stopping set property, the parity-check matrix for each code is modified by adding linearly dependent rows to the original parity-check matrix, or removing rows from it. These modifications are made in order to change the stopping set property of the codes. The performance of the modified parity-check matrices is thus analyzed, by comparing them to the original ones, using both theoretical analysis and simulation. The results show that the stopping set performance of linear block codes is not a crucial factor to their performances on other channels as it is in BEC. Sometimes the linear block codes of a better stopping set property do perform better in other channels, but sometimes the performance barely changes or even degrades. More precisely, the decoding performance of a certain parity-check matrix is determined by the type of codes, the type of channel and the decoding algorithm, rather than its stopping set property.Wireless and Mobile Communication GroupTelecommunicationsElectrical Engineering, Mathematics and Computer Scienc
Telling stories: a metagame description of a conflict
No full textThis paper describes the use of metagame analysis to describe and explore a conflict situation. The analysis was carried out by the author, who was associated with one of the parties in the conflict, for his own benefit. A full description of the analysis is provided. A particular characteristic of the situation was that it was not possible to specify preferences for scenarios for any of the actors with a reasonable degree of confidence. This made the standard metagame analysis approach unworkable, and an alternative approach, involving the development of stories describing a variety of possible future events, was used instead
Federation of Women\u27s Clubs Presents Check 1
No full textMrs. J.A. Britain, president of the Alabama Federation of Womens Clubs, standing left, presented Dr. J.H. Jones, director of the International House at Jacksonville State College, standing center, a check for $1,000 for the federation\u27s scholarship fund. Standing right Mary Lowrey, director of Second District, presided at the luncheon dinner. (circa April 27, 1962)https://digitalcommons.jsu.edu/lib-ac-histimg/34368/thumbnail.jp
Author Correction: Long-range chiral exchange interaction in synthetic antiferromagnets
No full textIn the version of this Article originally published, the sentence ‘D.-S.H. wrote the paper with K.L., J.H. and M.K.’ in the author contributions was incorrect; it should have read ‘D.-S.H. wrote the paper with K.L., J.H., M.-H.J. and M.K.’ This has been corrected in the online versions of the Article
New upper bounds on the separating redundancy of linear block codes
No full textMost decoding algorithms of linear codes, in general, are designed to correct or detect errors. However, many channels cause erasures in addition to errors. In principle, decoding over such channels can be accomplished by deleting the erased symbols and decoding the resulting vector with respect to a punctured code. For any given linear code and any given maximum number of correctable erasures, in the paper ‘Separating Erasures for Errors for Decoding’, [1], Abdel-Ghaffar and Weber introduced parity-check matrices yielding parity-check equations that do not check any of the erased symbols and which are sufficient to characterize all punctured codes corresponding to this maximum number of erasures. This allows for the separation of erasures from errors to facilitate decoding. Typically, these parity-check matrices have redundant rows. To reduce decoding complexity, parity-check matrices with small number of rows are preferred. The minimum number of rows in a parity-check matrix separating all erasure sets of size at most l is called the lth separating redundancy. In [1], upper and lower bounds on the separating redundancy were presented. In this paper, we give improvements on the upper bounds from [1].TelecommunicationsElectrical Engineering, Mathematics and Computer Scienc
Concrete Flow in Diaphragm Wall Panels: A Full-Scale In-Situ Test
No full textFlow processes, taking place during the concreting of diaphragm wall panels (D-wall panels), are of great importance for the quality of the wall. During this phase, the bentonite, present in the excavated trench, should be completely replaced by concrete in a controlled way. In literature several cases are described in which this process resulted in bentonite inclusions in the panel. These inclusions often lead to severe problems, like leakages, for the building pit to be excavated within the diaphragm wall panels. Beside the risks for the building pit, leakages caused by bentonite inclusions can also have large consequences for nearby constructions. In this article, set up and results of a full-scale diaphragm wall test are described. Conclusions are drawn with regard to the influence of several parameters on the flow process and subsequently on the quality of the wall and the risk on bentonite inclusions
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