117,184 research outputs found
Multilevel structured low-density parity-check codes for AWGN and Rayleigh channels
No full textWe propose a novel class of protograph low-density parity-check (LDPC) codes having a combinatorial rather than a random structure, which are termed multilevel-structured (MLS) LDPC codes. It is demonstrated that they posses a strikingly simple structure and, thus, benefit from reduced storage requirements, hardware-friendly implementations, and low-complexity encoding. Our simulation results provided for both additive white Gaussian noise (AWGN) and uncorrelated Rayleigh (UR) channels demonstrate that these advantages accrue without compromising the attainable bit error ratio (BER) and block error ratio (BLER) performance, when compared with their previously proposed more complex random-construction-based counterparts, as well as with other structured codes of the same length
Humans of AI3SD: Dr Nicholas Watson
No full textDr Nicholas Watson is an associate professor of chemical engineering at the University of Nottingham and his research is focused on data-driven in-process sensing to deliver sustainable, safe and productive food manufacturing systems.In this Humans of AI3SD interview he discusses the benefits of low-cost sensors for SMEs, why the real world is a lot more complicated than the controlled world of the lab, and the surprising value in getting your problems tackled by people who've never looked at it from your perspective
Letter from Seth Low
No full textWhittier House scrapbooks document Whittier House programs, events, and anniversary celebrations through newspaper clippings, lecture fliers, newsletters, event programs, and ticket stubs. Newspaper clippings are primarily from the Jersey Journal. There is also Whittier House fundraising materials, including pamphlets, appeal letters, brochures, and postcards. The Whittier House Social Settlement, the first settlement house in New Jersey, was established in Jersey City, N.J. (Hudson County) in 1894. Founded by Cornelia Foster Bradford, who would remain with the organization as headworker until 1926, Whittier House was based on the settlement house, Toynbee Hall, in England. Whittier House provided various recreational and educational programs, along with much needed social services, for the immigrant populations of Jersey City. Many of these successful services were used as models for large-scale social reform movements through the state. In 1935, the Whittier House was taken over by the Boys' Club of Jersey City
Design of low-density parity-check codes: An overview
No full textThis article provides an overview of the conflicting design tradeoffs of low-density parity-check (LDPC) codes and thus advocates a more holistic approach to their design for wireless channels. We reveal some of the intricate interdependencies of the LDPC code parameters and hence recommend designing codes that strike an attractive tradeoff concerning a number of desirable attributes, rather than simply designing codes that closely approach capacity but possess less-attractive hardware implementations
Multilevel structured low-density parity-check codes
No full textLow-Density Parity-Check (LDPC) codes are typically characterized by a relatively high-complexity description, since a considerable amount of memory is required in order to store their code description, which can be represented either by the connections of the edges in their Tanner graph or by the non-zero entries in their parity-check matrix (PCM). This problem becomes more pronounced for pseudo-random LDPC codes, where literally each non-zero entry of their PCM has to be enumerated, and stored in a look-up table. Therefore, they become inadequate for employment in memoryconstrainedtransceivers. Motivated by this, we are proposing a novel family of structured LDPC codes, termed as Multilevel Structured (MLS) LDPC codes, which benefit from reduced storage requirements, hardware-friendly implementations as well as from low-complexity encoding and decoding. Our simulation results demonstrate that these advantages accrue without any compromise in their attainable Bit Error Ratio (BER) performance, when compared to their previously proposed more complex counterparts of the same code-length. In particular, wecharacterize a half-rate quasi-cyclic (QC) MLS LDPC code having a block length of 8064 that can be uniquely and unambiguously described by as few as 144 edges, despite exhibiting an identical BER performance over both Additive White Gaussian Noise (AWGN) and uncorrelated Rayleigh (UR) channels, when compared to a pseudorandom construction, which requires the enumeration of a significantly higher number of 24,192 edges
Low-density parity-check codes and their rateless relatives
No full textThis survey guides the reader through the extensive open literature that is covering the family of low-density parity-check LDPC codes and their rateless relatives. In doing so, we will identify the most important milestones that have occurred since their conception until the current era and elucidate the related design problems and their respective solutions
Data for: Optimization of bio-oil and biochar yields from corn stover in low-tech smallholder pyrolysis system using response surface methodology
No full textThis document contains raw data for the article "Optimization of bio-oil and biochar yields from corn stover in low-tech smallholder pyrolysis system using response surface methodology" by Nicholas Munua, Noble Banadda, Nicholas Kiggundu, Ahamada Zziwa, Isa Kabenge, Jeffrey Seay, Robert Kambugu and Joshua Wanyam
Correction to: Resting Frontal EEG Asymmetry and Emotion Regulation in Older Adults: The Midlife in the United States (MIDUS) Study (Psychology and Aging (2019) 34:3 (341-347) DOI: 10.1037/pag0000344)
No full textIn the article "Resting Frontal EEG Asymmetry and Emotion Regulation in Older Adults: The Midlife in the United States (MIDUS) Study," by Nicholas J. Kelley and Matthew L. Hughes (Psychology and Aging, 2019, Vol. 34, No. 3, 341-347, http://dx.doi.org/10.1037/pag0000344), the text "We also did observe or predict" should read "We also did not observe, nor did we predict" in the following sentence of the fourth paragraph of the Discussion section: "We also did observe or predict, age-related differences in FAA among participants who either reported low usage of both emotion regulation strategies or high usage of both strategies." © 2018 American Psychological Association
VC: an American history/ Tom Nicholas.
No full textIncludes bibliographical references and index.VC tells the riveting story of how the venture capital industry arose from the United States' long-running orientation toward entrepreneurship. From nineteenth-century whaling to the multitude of firms pursuing entrepreneurial finance today, venture capital has been driven by the pull of low-probability but substantial financial rewards. Appreciating the history of venture capital, Tom Nicholas shows, is essential to understanding the industry's future directions and possibilities, its challenges and prospects for surmounting them, and its place in America's exceptional style of capitalism.--Introduction: The significance of history -- Whaling ventures -- The early development of risk capital -- The rise of private capital entities -- The market versus the government -- The limited partnership structure -- Silicon Valley and the emergence of investment styles -- Venture capital during the 1980s -- The big bubble -- Epilogue: From the past to the present and the future.1 online resource (vi, 382 pages
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