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Ucar, Egemen. "Ternary Nanocomposites Of High Density, Linear Low Density And Low Density Polyethylenes". Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608446/index.pdf.
Pełny tekst źródłaAX8900), as organoclay Cloisite®
15A were used. All samples were prepared by a co-rotating twin screw extruder, followed by injection molding. Considering ternary nanocomposites, highest impact strength results were obtained with 10% compatibilizer plus 2% organoclay
highest yield stress, elastic modulus, flexural strength, flexural modulus were obtained with 5% compatibilizer plus 4-6% organoclay. DSC data indicated that addition of organoclay and compatibilizer did not change the melting point remarkably
on the other hand it affected the crystallinity. The organoclay used had no nucleation effect on polyethylene, and the compatibilizer decreased the crystallinity of the matrix. X-ray diffraction showed that in all ternary nanocomposites and in binary nanocomposite of high density polyethylene with organoclay, layer separation associated with intercalation of the clay structure occurred,. The highest increase of interlayer gallery spacing was obtained with 10% compatibilizer plus 2% organoclay, which were 25%, 28% and 27% for HDPE, LLDPE and LDPE matrices respectively.
Cappello, Christian. "Ozoniertes Low Density-Lipoprotien (OzLDL)". kostenfrei, 2009. http://mediatum2.ub.tum.de/node?id=679935.
Pełny tekst źródłaGuo, Feng. "Low density parity check coding". Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419159.
Pełny tekst źródłaOliver, Matthew. "Density, temperature and magnetic field measurements in low density plasmas". Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:df217453-1e10-4684-beb7-83c1bcecf285.
Pełny tekst źródłaIsik, Coskunses Fatma. "Ternary Nanocomposites Of Low Density,high Density And Linear Low Density Polyethylenes With The Compatibilizers E-ma_gma And E-ba-mah". Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613294/index.pdf.
Pełny tekst źródłaMethyl acrylate &ndash
Glycidyl methacrylate terpolymer (E-MAGMA) and Ethylene &ndash
Butyl acrylate- Maleic anhydrate terpolymer (E-BA-MAH) were used as the compatibilizers. The organoclays selected for the study were Cloisite 30B and Nanofil 8. Nanocomposites were prepared by means of melt blending via co-rotating twin screw extrusion process. Extruded samples were injection molded to be used for material characterization tests. Optimum amounts of ingredients of ternary nanocomposites were determined based on to the mechanical test results of binary blends of PE/Compatibilizer and binary nanocomposites of PE/Organoclay. Based on the tensile test results, the optimum contents of compatibilizer and organoclay were determined as 5 wt % and 2 wt %, respectively. XRD and TEM analysis results indicated that intercalated and partially exfoliated structures were obtained in the ternary nanocomposites. In these nanocomposites E-MA-GMA compatibilizer produced higher d-spacing in comparison to E-BA-MAH, owing to its higher reactivity. HDPE exhibited the highest basal spacing among all the nanocomposite types with E-MA-GMA/30B system. Considering the polymer type, better dispersion was achieved in the order of LDPE<
LLDPE<
HDPE, owing to the linearity of HDPE, and short branches of LLDPE. MFI values were decreased by the addition of compatibilizer and organoclay to the matrix polymers. Compatibilizers imparted the effect of sticking the polymer blends on the walls of test apparatus, and addition of organoclay showed the filler effect and increased the viscosity. DSC analysis showed that addition of compatibilizer or organoclay did not significantly affect the melting behavior of the nanocomposites. Degree of crystallinity of polyethylene matrices decreased with organoclay addition. Nanoscale organoclays prevented the alignment of polyethylene chains and reduced the degree of crystallinity. Ternary nanocomposites had improved tensile properties. Effect of compatibilizer on property enhancement was observed in mechanical results. Tensile strength and Young&rsquo
s modulus of nanocomposites increased significantly in the presence of compatibilizers.
Pirou, Florent. "Low-density Parity-Check decoding Algorithms". Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2160.
Pełny tekst źródłaRecently, low-density parity-check (LDPC) codes have attracted much attention because of their excellent error correcting performance and highly parallelizable decoding scheme. However, the effective VLSI implementation of and LDPC decoder remains a big challenge and is a crucial issue in determining how well we can exploit the benefits of the LDPC codes in the real applications. In this master thesis report, following a error coding background, we describe Low-Density Parity-Check codes and their decoding algorithm, and also requirements and architectures of LPDC decoder implementations.
Warburton, Keith. "Control jets in low density flow". Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312454.
Pełny tekst źródłaHogg, Neil. "Oxidative modification of low density lipoprotein". Thesis, University of Essex, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316228.
Pełny tekst źródłaAhmad, Feroz. "Lysosomal oxidation of Low Density Lipoproteins". Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/72957/.
Pełny tekst źródłaVerdugo, Salgado Celia Anahi. "Star formation in low gas density and low metallicity environments". Observatoire de Paris, 2015. https://hal.science/tel-02095302.
Pełny tekst źródłaIn nearby galaxies, an empirical relation has been established between star formation and gas surface densities, the Kennicutt-Schmidt (KS). The relation is nearly linear when molecular gas (H2) is considered, while is less tight with atomic hydrogen (HI). These low gas density regions are of a key importance in the field of star formation, since the are also low metallicity environments, resembling the conditions of a younger universe. This thesis summarizes the observational work done with the IRAM 30MT telescope in two kinds of such regions : disk galaxies with extended ultra-violet emission (XUV), and the interstellar medium going into the hot intra-cluster medium (ICM) under ram-pressure stripping in the Virgo cluster. The galex telescope has unveiled in far ultra-violet (FUV) star formation in the outer parts of some disk galaxies that was not traced by HA. To determine the presence of H2 and analyse the K-S relation in these regions, CO observations where done in the outskirts of several XUV disk galaxies, finding both detections and upper limits. These K-S relations showed a broken power law at low gas densities, below the HI-H2 threshold. In the Virgo cluster, similar CO observations were done along the HI tidal arm connecting NGC4388 and M86, where no H2 is expected. Two detections were found, showing very low star formation efficiencies (depleting less than 0,1 % of the gas reservoir per 10 [exposant] 8 yr), and showing again a disconuity of the K-S relation at low gas densities, probing that the process of a gas consumption into stars well known at high densities cannot be extrapolated to lower densities, and that H2 can survive a certain time in the hostile ICM
Mizutani, T., H. Semi i K. Kaneko. "Space charge behavior in low-density polyethylene". IEEE, 2000. http://hdl.handle.net/2237/6796.
Pełny tekst źródłaBehravesh, Amir Hossein. "Extrusion processing of low-density microcellular foams". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0005/NQ35110.pdf.
Pełny tekst źródłaGopalraj, Rangaraj K. "LOW DENSITY LIPOPROTEIN RECEPTOR AND ALZHEIMERS DISEASE". UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_diss/697.
Pełny tekst źródłaMcDowell, Andrew. "Modifications of low density lipoprotein and atherosclerosis". Thesis, Queen's University Belfast, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314171.
Pełny tekst źródłaMartin, P. J. "Heat transfer through low density fibrous assemblies". Thesis, University of Leeds, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235418.
Pełny tekst źródłaYiangou, Savvakis Chrysostomou. "Fatigue crack propagation in low density polyethylene". Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47317.
Pełny tekst źródłaOzlutas, Kezban. "Behaviour of ultra-low density foamed concrete". Thesis, University of Dundee, 2015. https://discovery.dundee.ac.uk/en/studentTheses/ece1c184-2dee-428b-8742-7515c09f230f.
Pełny tekst źródłaKratzert, Daniel. "Charge Density Distribution in Low-Valent Tetrels". Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2013. http://hdl.handle.net/11858/00-1735-0000-001C-63A3-B.
Pełny tekst źródłaNiepötter, Benedikt. "Charge Density Analysis of Low-Valent Tetrels". Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://hdl.handle.net/11858/00-1735-0000-0028-86C1-8.
Pełny tekst źródłaPlanjery, Shiva Kumar. "Low-Complexity Finite Precision Decoders for Low-Density Parity-Check Codes". International Foundation for Telemetering, 2010. http://hdl.handle.net/10150/605947.
Pełny tekst źródłaWe present a new class of finite-precision decoders for low-density parity-check (LDPC) codes. These decoders are much lower in complexity compared to conventional floating-point decoders such as the belief propagation (BP) decoder, but they have the potential to outperform BP. The messages utilized by the decoders assume values (or levels) from a finite discrete set. We discuss the implementation aspects as well as describe the underlying philosophy in designing these decoders. We also provide results to show that in some cases, only 3 bits are required in the proposed decoders to outperform floating-point BP.
Selvarathinam, Anand Manivannan. "High throughput low power decoder architectures for low density parity check codes". Texas A&M University, 2005. http://hdl.handle.net/1969.1/2529.
Pełny tekst źródłaPersons, Jane Elizabeth. "Characterizing the relationship between low serum low-density lipoprotein and depressive symptoms". Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/5600.
Pełny tekst źródłaChandler, Gary James. "Sensitivity analysis of low-density jets and flames". Thesis, University of Cambridge, 2011. https://www.repository.cam.ac.uk/handle/1810/246531.
Pełny tekst źródłaKarl, Michelle Marie. "Modelling the viscoelastic properties of low density polyethylene". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0013/MQ52585.pdf.
Pełny tekst źródłaMeidan, Amir. "Linear-time encodable low-density parity-check codes". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0006/MQ40942.pdf.
Pełny tekst źródłaSharifi, Tehrani Saeed. "Stochastic decoding of low-density parity-check codes". Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97010.
Pełny tekst źródłaÀ ce jour, les codes Low-Density Parity-Check (LDPC) font partie des codes correcteurs d'erreurs les plus performants. Ces codes sont inclus dans différents standards de communications numériques. Dans ce manuscrit, nous proposons d'utiliser le décodage stochastique pour les codes LDPC. D'autre part, nous démontrons que pour les codes LDPC, le décodage stochastique représente une alternative réaliste aux algorithmes de décodage existants.Dans le processus de décodage stochastique, les probabilités sont représentées sous forme de séquences de Bernoulli. L'information est contenue dans la statistique de ces flux binaires aléatoires. Cette représentation particulière permet d'exécuter des calculs intensifs avec une faible complexité matérielle. Cependant le décodage stochastique est enclin au problème du verrouillage ("latching"). La corrélation entre les bits des différents flux au sein des cycles du graphe biparti dégrade les performances du décodage stochastique des codes LDPC. Pour résoudre le problème du verrouillage, nous proposons trois solutions: les mémoires de branche, les mémoires de suivi, et les mémoires de suivi à majorité. Ces différents composants permettent de suivre l'évolution de la statistique des flux binaires et de réintroduire des éléments aléatoires au sein des séquences observées, minimisant ainsi le phénomène de verrouillage. À notre connaissance, il s'agit là des premiers résultats probants permettant un décodage stochastique efficace des codes LDPC. Nous proposons de nouvelles architectures de décodeurs associées à leurs implantations matérielles respectives. La plus perfectionnée des architectures présentée ici est celle d'un décodeur stochastique pour le code LDPC (2048,1723) associé au standard IEEE 802.3an. À notre connaissance, en comparaison avec l'état de l'art actuel, ce décodeur dispose du meilleur rapport vitesse/complexité. Le débit maximum (au niveau du coeur), est de 61.3 Gb/s, il s'agit là du plus rapide des décodeurs de codes LDPC à décisions souples connu à ce jour. Nous présentons par ailleurs les performances de ce décodeur à très faible taux d'erreurs binaire. De plus, nous proposons d'appliquer le calcul stochastique au décodage conjoint des codes LDPC et des canaux à réponse partielle qui est utilisé dans les applications d'enregistrement magnétique. Enfin, nous étudions l'extension du décodage stochastique au décodage des codes en blocs ayant une matrice de parité à forte densité. Nous appliquons le décodage stochastique sur des graphes biparti aux codes Reed-Solomon, Bose-Chaudhuri-Hocquenghem, et aux turbocodes en blocs.
Brooks, David Graham. "Aspects of low density lipoprotein receptor gene regulation". Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360598.
Pełny tekst źródłaDavey, M. C. "Error-correction using low-density parity-check codes". Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598305.
Pełny tekst źródłaLing, I.-Fang. "REGULATION OF LOW DENSITY LIPOPROTEIN RECEPTOR SPLICING EFFICIENCY". UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_diss/794.
Pełny tekst źródłaPaolini, Enrico <1977>. "Iterative decoding methods based on low-density graphs". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/406/.
Pełny tekst źródłaPatterson, Rebecca Anne. "Antioxidants, pro-oxidants and low density lipoprotein oxidation". Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285960.
Pełny tekst źródłaAnderson, Simon Hamish Charles. "Silicon: a treatment for low bone mineral density". Thesis, King's College London (University of London), 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414415.
Pełny tekst źródłaPannala, Venkata Ananth Sekher. "Peroxynitrite induced oxidative modification of low density lipoprotein". Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301124.
Pełny tekst źródłaOthman, Mohd Izani. "Low density lipoprotein induction of intracellular oxidants production". Thesis, University of Canterbury. School of Biological Sciences, 2015. http://hdl.handle.net/10092/11300.
Pełny tekst źródłaBerchuk, Vitaliy, Ed Grozalis, Jennifer Yin i Chris Dehmelt. "A Low Cost, High Density Reconfigurable Recording Subsystem". International Foundation for Telemetering, 2012. http://hdl.handle.net/10150/581620.
Pełny tekst źródłaModern test programs require an increase in sensor and bus data while at the same time seeking a decrease in the size and price of data acquisition components. Data archiving, which has been traditionally supplied via dedicated standalone hardware, is not exempt to this demand, but in many ways has not kept up with other instrumentation components in terms of flexibility, size, density and price. The archiving capabilities of a data acquisition system must be able to meet the changing needs of the customer. This paper presents a Solid State Drive (SSD) based data recorder implementation that can be easily reconfigured to address the requirements of different applications, including traditional PCM based systems and contemporary network based systems. The paper identifies the requirements, design challenges, trade-offs and risks in creating a low-cost, flexible data archiving subsystem that can be used in a standalone configuration or be directly integrated with a host data acquisition system.
Rabie, Allan John. "Blends with low-density polyethylene (LDPE) and plastomers". Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/49870.
Pełny tekst źródłaENGLISH ABSTRACT: This study describes the design, building and optimization of a fully functional preparative TREF (Prep-TREF) apparatus. This apparatus allows for the fractionation of semicrystalline polyolefins according to the crystallizability of the molecules. Various factors, such as the sample cooling rate and the effect of on-support and off-support crystallization, are investigated. The preparative TREF is used to fractionate a commercial low-density polyethylene (LOPE), two commercially available plastomers (polyethylene-l-octene copolymers), as well as blends of the LOPE and the respective plastomers. It is shown that in each case the samples fractionated by crystallizability. The fractions recovered from the Prep-TREF were characterized by CRYSTAF, OSC and NMR analysis. It is shown how the results of this preparative fractionation allow for a better understanding of the molecular heterogeneity in the LOPE and plastomers. New ways of presenting the data from the preparative fractionation, in terms of 3- dimensional plots, are also investigated. These plots offer a novel way of presenting the molecular heterogeneity in the samples in terms of the molecular crystallizability. These plots highlight features that are difficult to detect in the conventional two-dimensional plots. In conclusion, the influences of various blending ratios of LOPE and plastomer on the morphological and physical properties of the blends, such as haze, clarity, and tear-and impact strength are determined.
AFRIKAANSE OPSOMMING: Die doel van hierdie studie was die ontwikkeling en optimisering van 'n ten volle funksionerende TREF. Hierdie tegniek word gebruik om polimeermengsels te fraksioneer deur gebruik te maak van die kristaliseerbaarheid van polimere. Verskeie faktore soos die afkoel spoed en die effect van met en sonder 'n ondersteuning(seesand) vir kristaliseering was ondersoek. Hierna is navorsing gedoen om 'n beter begrip ten opsigte van die meganiese, fisiese en optiese eienskappe van lae-digtheid poliëtileen (LDPE) te ontwikkel. Hierdie LDPE is met die affiniteitsreeks plastomere van die maatskappy, Dow Chemicals, gemeng om tendense in die gefraksioneerde polimere te indentifiseer. Een van Sasol se kommersiële LDPE produkte en twee van Dow Chemicals se plastomere is individueel gefraksioneer. Die mengsel van die twee ongefraksioneerde LDPE en plastomere is nog nooit voorheen op 'n molekulêre basis ondersoek nie. Dit is in hierdie studie gedoen deur van TREF gebruik te maak. Nuwe maniere is ontwikkel om data op 'n nuwe manier voor te stel deur middel van 3 Dimensionele grafieke te skep om resultate voor te stel wat andersins baie moelilik was om voor te stel in een dimensie agv die hoeveelheid data wat geinterpreteer word. Ten slotte is die invloed van die verskillende mengverhoudings van LDPE en plastomere op die morfologiese en fisiese eienskappe soos deursigtigheid, helderheid, skeur- en impaksterkte, ook ondersoek.
Hayes, Bob. "LOW DENSITY PARITY CHECK CODES FOR TELEMETRY APPLICATIONS". International Foundation for Telemetering, 2007. http://hdl.handle.net/10150/604497.
Pełny tekst źródłaNext generation satellite communication systems require efficient coding schemes that enable high data rates, require low overhead, and have excellent bit error rate performance. A newly rediscovered class of block codes called Low Density Parity Check (LDPC) codes has the potential to revolutionize forward error correction (FEC) because of the very high coding rates. This paper presents a brief overview of LDPC coding and decoding. An LDPC algorithm developed by Goddard Space Flight Center is discussed, and an overview of an accompanying VHDL development by L-3 Communications Cincinnati Electronics is presented.
Moon, Todd K., i Jacob H. Gunther. "AN INTRODUCTION TO LOW-DENSITY PARITY-CHECK CODES". International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/607470.
Pełny tekst źródłaLow-Density Parity-Check (LDPC) codes are powerful codes capable of nearly achieving the Shannon channel capacity. This paper presents a tutorial introduction to LDPC codes, with a detailed description of the decoding algorithm. The algorithm propagates information about bit and check probabilities through a tree obtained from the Tanner graph for the code. This paper may be useful as a supplement in a course on error-control coding or digital communication.
Tcheslavskaia, Ksenia Sergeyevna. "Mating Success in Low-Density Gypsy Moth Populations". Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/27859.
Pełny tekst źródłaPh. D.
Anitei, Irina. "Circular Trellis based Low Density Parity Check Codes". Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1226513009.
Pełny tekst źródłaWheatley, Vincent. "Modelling low-density flow in hypersonic impulse facilities /". [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16173.pdf.
Pełny tekst źródłaOmidy, Ali D. "Multiphase Interaction in Low Density Volumetric Charring Ablators". UKnowledge, 2018. https://uknowledge.uky.edu/me_etds/128.
Pełny tekst źródłaNouri, Nima. "Radiative Conductivity Analysis Of Low-Density Fibrous Materials". UKnowledge, 2015. https://uknowledge.uky.edu/me_etds/66.
Pełny tekst źródłaPrice, Aiden K. "Improved constructions of low-density parity-check codes". Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/128373/1/Aiden_Price_Thesis.pdf.
Pełny tekst źródłaAltintas, Bekir. "Electrical And Mechanical Properties Of Carbon Black Reinforced High Density Polyethylene/low Density Polyethylene Composites". Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12604976/index.pdf.
Pełny tekst źródłaC. Amounts of LDPE were changed to 30, 40, 50 and 60 percent by the volume and the percent amounts of CB were changed to 5, 10,15, 20 and 30 according to the total volume. Thermal and morphological properties were investigated by using Differential Scanning Calorimeter (DSC), Scanning Electron Microscope (SEM). Mechanical properties were investigated by tensile test and hardness measurements. Melt flow properties were studied by Melt Flow Index (MFI) measurements. Electrical conductivities were measured by four probe and two probe techniques. Temperature dependence of electrical conductivity was also studied. In general, it is observed that stress at break and MFI values decrease by the addition of CB
however, modulus and hardness increase. DSC results indicated that the crystallization of the polymer blend was decreased by the addition of CB. SEM results showed that the components were mixed homogenously. Increasing CB content increased electrical conductivity. Furthermore, by increasing the temperature, positive temperature coefficient behavior was observed which increases when CB content decreased.
Sànchez, Riera Lídia. "The Global Burden Attributable to Low Bone Mineral Density". Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/305365.
Pełny tekst źródłaINTRODUCCIÓN: En la iniciativa The Global Burden of Disease Study 2010, la densidad mineral ósea (DMO) ha sido analizada como un factor de riesgo de fracturas, las cuales son analizadas como parte de la carga en salud atribuida a las caídas. Las medidas métricas principales para determinar la carga en salud de dicha iniciativa son los Disability-Adjusted Life Years (DALYs), los Years lived with disability (YLDs), los Years of Life Lost due to premature mortality (YLLs), y las Muertes. OBJETIVOS: Calcular la distribución mundial de los valores de DMO; calcular el número de DALYs, YLDs, YLLs y muertes debidos a la baja DMO. MÉTODOS: Se realizó una revisión sistémica de estudios poblacionales con valores de DMO medidos con Dual-X-Ray-Absorptiometry en cuello femoral en población a partir de 50 años. Se utilizó análisis de riesgo comparativo para determinar la fracción poblacional atribuible de la DMO para caídas. El percentil 90 por grupo de edad y género del estudio americano NHANESIII se adquirió como la distribución de mínimo riesgo posible del factor de exposición. Los riesgos relativos DMO-fractura se obtuvieron de una meta-análisis previa. Datos hospitalarios con doble codificación (causa y tipo de lesión) se utilizaron para calcular la fracción de la carga en salud de las caídas debido a las fracturas. RESULTADOS: Las muertes y los DALYs mundiales atribuibles a la baja DMO incrementaron de 103.000 y 3.125.000 en 1990 a 188.000 y 5.216.000 en 2010, respectivamente. Un tercio de todas las muertes relacionadas con caídas fueron atribuibles a la baja DMO. La DMO fue responsable de un 12.1% y un 14.8% de todos los DALYs por caídas en 1990 y 2010, respectivamente. El Asia Sur y Asia Este fueron las regiones del mundo que más contribuyeron al aumento de la carga mundial en salud atribuible a la baja DMO. CONCLUSIÓN: Los resultados muestran un aumento de la carga en salud mundial debido a la bajo DMO entre 1990 y 2010. Una séptima parte de los DALYs y un tercio de las muertes en el mundo debido a caídas fueron atribuibles a la baja DMO, y por lo tanto, prevenibles.
Blad, Anton. "Efficient Decoding Algorithms for Low-Density Parity-Check Codes". Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2794.
Pełny tekst źródłaLow-density parity-check codes have recently received much attention because of their excellent performance and the availability of a simple iterative decoder. The decoder, however, requires large amounts of memory, which causes problems with memory consumption.
We investigate a new decoding scheme for low density parity check codes to address this problem. The basic idea is to define a reliability measure and a threshold, and stop updating the messages for a bit whenever its reliability is higher than the threshold. We also consider some modifications to this scheme, including a dynamic threshold more suitable for codes with cycles, and a scheme with soft thresholds which allow the possibility of removing a decision which have proved wrong.
By exploiting the bits different rates of convergence we are able to achieve an efficiency of up to 50% at a bit error rate of less than 10^-5. The efficiency should roughly correspond to the power consumption of a hardware implementation of the algorithm.
Ha, Jeongseok Ha. "Low-Density Parity-Check Codes with Erasures and Puncturing". Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/5296.
Pełny tekst źródłaSchmauß, Daniel. "Modulation von dendritischen Zellen durch oxidiertes Low Density Lipoprotein". Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-113040.
Pełny tekst źródłaMizutani, T., H. Semi, K. Kaneko, T. Mori i M. Ishioka. "Space Charge and Field Distributions in Low-Density Polyethylene". IEEE, 2000. http://hdl.handle.net/2237/7178.
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