1,649 research outputs found
Burst-by-burst Adaptive Joint-Detection CDMA/H.26L Based Wireless Video Telephony using TTCM and LDPC Codes
No full textA low bit-rate video coding techniques using the H.26L standard codec for robust transmission in mobile multimedia environments are presented. For the sake of achieving error resilience, the source codec has to make provisions for error detection, resynchronization and error concealment. Thus a packetization technique invoking adaptive bit-rate control was used in conjunction with the various modulation scheme employed. In this contribution, we propose a Burst-by-Burst Adaptive Coded Modulation-Aided Joint Detection-Based CDMA (ACM-JD-CDMA) scheme for wireless video telephony and characterise its performance when communicating over the UTRA wideband vehicular fading channels. The coded modulation schemes invoked in our fixed modulation mode based systems are Low Density Parity Check code based Block Coded Modulation (LDPC-BCM) and Turbo Trellis Coded Modulation (TTCM). The performance of LDPC-BCM was evaluated and compared to that of TTCM in the context of the ACM-JD-CDMA system using a practical modem mode switching regime. Both schemes exhibited a similar transmission integrity, although the LDPC arrangement is capable of achieving this at a lower complexity
NEOMiSS: A near-Earth object decision support tool
No full textThe Near Earth Object Mitigation Support System (NEOMiSS) is a decision support tool, enabling scientists, emergency planners and policy-makers to understand and assess the human vulnerability and risks due to a potential NEO collision with the Earth. NEOMiSS extends the functionality offered by the NEOSim and NEOimpactor tools, developed at the University of Southampton. It provides an improved human casualty estimator using vulnerability models of multiple NEO impact hazards. In addition, it also offers an evacuation simulator for prediction of an areas ability to evacuate, which is used for modifying the human vulnerability. These tools enable NEOMiSS to deliver reliable predictions of the human casualties arising from impact hazards along a NEO risk corridor. As such, decisions affecting NEO deflection campaigns (which modify the risk corridor) can be taken in the context of the human consequences. In addition, NEOMiSS provides a mechanism for managing the uncertainties in the data and modelfitting, thereby enabling the confidence in risk assessments to be quantified. This paper presents the results of a preliminary study using the NEOMiSS multi-hazard human vulnerability model. Here, NEOMiSS is used to predict the number of casualties arising from the impact of asteroid 99942 Apophis along the 2036 risk corridor. The evacuation simulator was then used to understand the effects of two evacuation scenarios on the population in an area where a high number of casualties is likely. The case study is used to illustrate the capabilities of NEOMiSS whilst it is still undergoing development
LDPC and Turbo Coding Assisted Space-Time Block Coded OFDM for H.26L
No full textIn this contribution we propose an LDPC assisted Space-Time Block Coded OFDM transceiver designed for wireless video telephony and characterise its performance when communicating over the UTRA wideband vehicular fading channels. Low Density Parity Check (LDPC) and turbo channel coding schemes are invoked. By concatenating a space-time block coded OFDM scheme with powerful channel codes, the performance of the system can be substantially enhanced. The LDPC codec outperformed the turbo codec in terms of both the achievable video and transmission frame error rate performance
Micronuclei and nuclear anomalies in urinary exfoliated cells of subjects in radionuclide-contaminated regions
No full textNeogene eolian deposits within the West Qinling Mountains: Climatic and tectonic implications
No full textA Review on Automatic Generation of Architectural Space Layouts with Energy Performance Optimization
No full textGreen Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Climate Design and SustainabilityDesign InformaticsBuilding ServicesArchitectural Engineering +Technolog
Les Fables de La Fontaine et Hitler
No full textI had known several of the designs in this book for years and despaired of ever finding them. Then I found them in the 2010 facsimile reproduction of the 1939 original by Nouvelles Editions Latines. I wrote when I catalogued that edition that I was all the more eager to find an original. I had never had one in my hand. I was amazed to find this copy on eBay and even more amazed when I won the auction. This original was published shortly before the German conquest of France and the consequent destruction of materials like this, materials critical of Nazis. Ten fables are presented with their La Fontaine texts utterly intact. The blurb on the back cover of the reproduction has it right: Cet album, textes et dessins, dénonçait la férocité et la mégalomanie du chancelier allemand. In this book it is the satirical illustrations that make the difference! Several seem to me to apply less well. Among those that may seem to stretch La Fontaine in order to criticize Hitler, I would list FC and GA. Who is that asking Hitler the crow to drop the cheese that is Poland? And I would never have envisioned Hitler as the artist grasshopper needing to ask the ants for shelter…. Several illustrations, though, hit the mark perfectly! Those that seem made for criticizing Hitler have the representations that I have seen and remembered, particularly WL and MM. Hitler as a milkmaid is a riot! Notice the doll or girl lying near the lamb in WL's illustration. The Wolf Become a Shepherd portrays the shepherd as the angel of peace sleeping in the pasture. One that seems more a prophecy than a critique is OR. Who is that goddess that sends the lightning down to uproot the Hitler-oak? OF similarly looks forward to Hitler's self-explosion.Language note: FrenchJean de La Fontain
Specimen handling: radical and partial nephrectomy specimens
No full textProvides the WHO classification of kidney tumors
Provide updated, comprehensive, and practical information
Written by experts in their field
Correction to: Graft immaturity and safety concerns in transplanted human kidney organoids
No full textAfter online publication of this article, the authors noticed an error in the Affiliation section. The correct statement of this article should have read as below. © 2020, The Author(s).11Nsciescopuskc
Remembering Corporal J.Y. Joyner : An Historical Fiction
No full textThis is a creative nonfiction narrative about the farm life and military service of a Nash County resident J.Y. Joyner. This narrative will be a combination of real-life facts reality-based situations and settings derived from extensive research and will be told from a fictional point-of-view. This style is influenced and inspired by the work of author/historian Stephen Ambrose (Band of Brothers Citizen Soldiers) Phillip Gerrard (Cape Fear Rising) William Faulkner (As I Lay Dying) and the books of Jeff and Michael Shaara (Killer Angels Gods & Generals The Last Full Measure). The work of these authors takes carefully researched time periods and settings factual events and in some cases -- particularly with the Shaaras -- uses a fictional character/observer/narrator to tell the story relate the events while adding interest and color. The projected length of this manuscript is approximately 50 pages. I will present this narrative in this format for several reasons. Joyner was killed in World War II and I first came across his name on a plaque at the Nash County Courthouse in Nashville NC listed along with other natives who died in wars. Years ago as part of an ongoing series of Memorial Day columns for the local newspaper I discovered I could find very little information about him. While working on a research project I discovered a headstone -- relatively new -- at Oakwood Cemetery in Spring Hope NC. As part of that project I was able to find out his unit where it was in action and where he was most likely killed -- just before the Battle of the Bulge. By using first person I will be able to disjoint time and present a unique approach and perspective to the narrative through the eyes of a detached observer. I want to use the first-person narrative to move Joyner from a name on a plaque to an identity of a young boy who was sent to war on a continent on the other side of the world. By closing the distance between the story and the narrator I intend to hold the reader's interest and involve them more deeply into the story. The narrative will cover the present in the form of finding this stone in the cemetery and seeing Joyner's name on a plaque at the Courthouse in Nashville; the time and place where Joyner was killed in action; and how his farm family back home dealt with the loss and also how it affected daily life on the farm -- which was very reliant on labor over machines at that point in history. The first part of the manuscript will be first-person from the point of view of the narrator who finds the marker in the cemetery; the second part of the manuscript will be from the viewpoint of Joyner's younger brother. The majority of my research will come from newspaper accounts websites unit records and books written about the war and the 1940s in America. Additional material will come from personal interviews of people who grew up on farms in southern Nash County era during this time. My interest in this project is to create a narrative that blends nonfiction and fiction but is researched based. By blending these genres filling in blanks where facts cannot be located I will create a narrative that will hopefully push boundaries and offer uncommon viewpoints and less stereotypical presentation of history -- especially with topics that have been written about so much: war the South and rural farm life
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