Готові списки джерел за темами / IOwec

Добірка наукової літератури з теми "IOwec"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "IOwec"

1

Garand, Louis, Sylvain Heilliette, and Mark Buehner. "Interchannel Error Correlation Associated with AIRS Radiance Observations: Inference and Impact in Data Assimilation." Journal of Applied Meteorology and Climatology 46, no. 6 (June 1, 2007): 714–25. http://dx.doi.org/10.1175/jam2496.1.

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Abstract The interchannel observation error correlation (IOEC) associated with radiance observations is currently assumed to be zero in meteorological data assimilation systems. This assumption may lead to suboptimal analyses. Here, the IOEC is inferred for the Atmospheric Infrared Radiance Sounder (AIRS) hyperspectral radiance observations using a subset of 123 channels covering the spectral range of 4.1–15.3 μm. Observed minus calculated radiances are computed for a 1-week period using a 6-h forecast as atmospheric background state. A well-established technique is used to separate the observation and background error components for each individual channel and each channel pair. The large number of collocations combined with the 40-km horizontal spacing between AIRS fields of view allows robust results to be obtained. The resulting background errors are in good agreement with those inferred from the background error matrix used operationally in data assimilation at the Meteorological Service of Canada. The IOEC is in general high among the water vapor–sensing channels in the 6.2–7.2-μm region and among surface-sensitive channels. In contrast, it is negligible for channels within the main carbon dioxide absorption band (13.2–15.4 μm). The impact of incorporating the IOEC is evaluated from 1D variational retrievals at 381 clear-sky oceanic locations. Temperature increments differ on average by 0.25 K, and ln(q) increments by 0.10, where q is specific humidity. Without IOEC, the weight given to the observations appears to be too high; the assimilation attempts to fit the observations nearly perfectly. The IOEC better constrains the variational assimilation process, and the rate of convergence is systematically faster by a factor of 2.
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Firdaus, Muhammad, Sandi Rahmadika, and Kyung-Hyune Rhee. "Decentralized Trusted Data Sharing Management on Internet of Vehicle Edge Computing (IoVEC) Networks Using Consortium Blockchain." Sensors 21, no. 7 (March 31, 2021): 2410. http://dx.doi.org/10.3390/s21072410.

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The emergence of the Internet of Vehicles (IoV) aims to facilitate the next generation of intelligent transportation system (ITS) applications by combining smart vehicles and the internet to improve traffic safety and efficiency. On the other hand, mobile edge computing (MEC) technology provides enormous storage resources with powerful computing on the edge networks. Hence, the idea of IoV edge computing (IoVEC) networks has grown to be an assuring paradigm with various opportunities to advance massive data storage, data sharing, and computing processing close to vehicles. However, the participant’s vehicle may be unwilling to share their data since the data-sharing system still relies on a centralized server approach with the potential risk of data leakage and privacy security. In addition, vehicles have difficulty evaluating the credibility of the messages they received because of untrusted environments. To address these challenges, we propose consortium blockchain and smart contracts to accomplish a decentralized trusted data sharing management system in IoVEC. This system allows vehicles to validate the credibility of messages from their neighboring by generating a reputation rating. Moreover, the incentive mechanism is utilized to trigger the vehicles to store and share their data honestly; thus, they will obtain certain rewards from the system. Simulation results substantially display an efficient network performance along with forming an appropriate incentive model to reach a decentralized trusted data sharing management of IoVEC networks.
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Li, Liang, Hongmei Zhang, John W. Holloway, Susan Ewart, Caroline L. Relton, S. Hasan Arshad, and Wilfried Karmaus. "Does DNA methylation mediate the association of age at puberty with forced vital capacity or forced expiratory volume in 1 s?" ERJ Open Research 8, no. 1 (January 2022): 00476–2021. http://dx.doi.org/10.1183/23120541.00476-2021.

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BackgroundAge of pubertal onset is associated with lung function in adulthood. However, the underlying role of epigenetics as a mediator of this association remains unknown.MethodsDNA methylation (DNAm) in peripheral blood was measured at age 18 years in the Isle of Wight birth cohort (IOWBC) along with data on age of pubertal events, forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1) at 26 years. Structural equation models were applied to examine mediation effects of DNAm on the association of age at pubertal events with FVC and FEV1. Findings were further tested in the Avon Longitudinal Study of Parents and Children (ALSPAC) cohort.ResultsIn the IOWBC, for females, 21 cytosine-phosphate-guanine sites (CpGs) were shown to mediate the association of age at puberty with FVC or FEV1 at 26 years (p<0.05). In males, DNAm at 20 CpGs was found to mediate the association of age at puberty with FVC (p<0.05). At almost all these CpGs, indirect effects (effects of age at pubertal events on FVC or FEV1via DNAm) contributed a smaller portion to the total effects compared to direct effects (e.g. at cg08680129, ∼22% of the estimated total effect of age at menarche on FVC at age 26 was contributed by an indirect effect). Among the IOWBC-discovered CpGs available in ALSPAC, none of them was replicated in ALSPAC (p>0.05).ConclusionsOur findings suggest that post-adolescence DNAm in peripheral blood is likely not to mediate the association of age at pubertal onset with young adulthood FVC or FEV1.
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Arshad, S. Hasan, John W. Holloway, Wilfried Karmaus, Hongmei Zhang, Susan Ewart, Linda Mansfield, Sharon Matthews, Claire Hodgekiss, Graham Roberts, and Ramesh Kurukulaaratchy. "Cohort Profile: The Isle Of Wight Whole Population Birth Cohort (IOWBC)." International Journal of Epidemiology 47, no. 4 (March 14, 2018): 1043–44. http://dx.doi.org/10.1093/ije/dyy023.

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5

Rathod, Aniruddha, Hongmei Zhang, Syed Hasan Arshad, Susan Ewart, Caroline L. Relton, Wilfried Karmaus, and John W. Holloway. "DNA Methylation and Asthma Acquisition during Adolescence and Post-Adolescence, an Epigenome-Wide Longitudinal Study." Journal of Personalized Medicine 12, no. 2 (February 2, 2022): 202. http://dx.doi.org/10.3390/jpm12020202.

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Анотація:
The role of epigenetics in the pathogenesis of asthma acquisition in adolescence and post-adolescence has been unknown. We carried out a longitudinal epigenome-wide association study, using data from the Isle of Wight Birth Cohort (IOWBC). To improve statistical power, we first screened CpGs based on associations of DNA methylation (DNAm) at an age of 10 years (pre-adolescence) with asthma acquisition at 10–18 years (during adolescence). A logistic regression with repeated measures was applied to CpGs that passed screening to examine the associations of pre-adolescence DNAm with asthma acquisition from 10–18 years and 18–26 years, with an interaction term to evaluate transition period specificity. Findings were further tested in an independent birth cohort, ALSPAC. In total, 205 CpGs (with 150 being females) showed associations with asthma acquisition (main or interaction effects) at FDR = 0.05 in IOWBC, of which 112 (90 being females) showed consistent associations in the ALSPAC. Genes that the identified CpGs were mapped to, e.g., AKAP1 and ENO1, have been shown to be associated with the risk of asthma. Our findings indicated that DNAm at specific CpGs was associated with asthma acquisition. CpGs showing such associations were likely to be different between males and females and, at certain CpGs, were unique to a specific transition period.
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Arshad, S. Hasan, Veeresh Patil, Frances Mitchell, Stephen Potter, Hongmei Zhang, Susan Ewart, Linda Mansfield, Carina Venter, John W. Holloway, and Wilfried J. Karmaus. "Cohort Profile Update: The Isle of Wight Whole Population Birth Cohort (IOWBC)." International Journal of Epidemiology 49, no. 4 (July 8, 2020): 1083–84. http://dx.doi.org/10.1093/ije/dyaa068.

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7

Glikson, M., D. L. Gibson, and R. P. Philp. "Organic matter in Australian Cambrian oil shales and other Iower Palaeozoic shales." Chemical Geology 51, no. 3-4 (October 1985): 175–91. http://dx.doi.org/10.1016/0009-2541(85)90130-5.

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8

Luo, Rui, Nandini Mukherjee, Su Chen, Yu Jiang, S. Hasan Arshad, John W. Holloway, Anna Hedman, et al. "Paternal DNA Methylation May Be Associated With Gestational Age at Birth." Epigenetics Insights 13 (January 2020): 251686572093070. http://dx.doi.org/10.1177/2516865720930701.

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Background: How epigenetic modifications of DNA are associated with gestational age at birth is not fully understood. We investigated potential effects of differential paternal DNA methylation (DNAm) on offspring gestational age at birth by conducting an epigenome-wide search for cytosine-phosphate-guanine (CpG) sites. Methods: Study participants in this study consist of male cohort members or partners of the F1-generation of the Isle of Wight Birth Cohort (IoWBC). DNAm levels in peripheral blood from F1-fathers (n = 92) collected around pregnancy of their spouses were analyzed using the Illumina 450K array. A 5-step statistical analysis was performed. First, a training-testing screening approach was applied to select CpG sites that are potentially associated with gestational age at birth. Second, functional enrichment analysis was employed to identify biological processes. Third, by centralizing on biologically informative genes, Cox proportional hazards models were used to assess the hazard ratios of individual paternal CpGs on gestational age adjusting for confounders. Fourth, to assess the validity of our results, we compared our CpG-gestational age correlations within a Born into Life Study in Sweden (n = 15). Finally, we investigated the correlation between the detected CpGs and differential gene expression in F2 cord blood in the IoWBC. Results: Analysis of DNAm of fathers collected around their partner’s pregnancy identified 216 CpG sites significantly associated with gestational age at birth. Functional enrichment pathways analyses of the annotated genes revealed 2 biological pathways significantly related to cell-cell membrane adhesion molecules. Differential methylation of 9 cell membrane adhesion pathway-related CpGs were significantly associated with gestational age at birth after adjustment for confounders. The replication sample showed correlation coefficients of 2 pathway-related CpGs with gestational age at birth within 95% confidence intervals of correlation coefficients in IoWBC. Finally, CpG sites of protocadherin ( PCDH) gene clusters were associated with gene expression of PCDH in F2 cord blood. Conclusions: Our findings suggest that differential paternal DNAm may affect gestational age at birth through cell-cell membrane adhesion molecules. The results are novel but require future replication in a larger cohort.
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9

Molecki, Adam. "Electromobility & public transport." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 18, no. 9 (September 30, 2017): 16–19. http://dx.doi.org/10.24136/atest.2017.032.

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Анотація:
There have been made many steps In Poland for about a year to noticeably increase the number ofelectric vehicles In traffic. Undoubtedly, this is a positive direction of change. The government's electromobility support plan is focused on the development of new technologies. For the traffic, in the short term, it can improve the quality of life especiaiły in cities. In the long period, it should lead to Iower prices for electric vehicles, and conseguently to maintain the trend of elimination of vehicles with internal combustion engines. At the same time, attention should be paid to several aspects that seem to be very debatable - the return to the promotion of individual transport, and what is even worse - the possible depreciation of the public transport system.
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10

Liu, Jia, Mingyu Zhang, Chaoyong Wang, Rongjun Chen, Xiaofeng An, and Yufei Wang. "Upper Bound on the Bit Error Probability of Systematic Binary Linear Codes via Their Weight Spectra." Discrete Dynamics in Nature and Society 2020 (January 29, 2020): 1–11. http://dx.doi.org/10.1155/2020/1469090.

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In this paper, upper bound on the probability of maximum a posteriori (MAP) decoding error for systematic binary linear codes over additive white Gaussian noise (AWGN) channels is proposed. The proposed bound on the bit error probability is derived with the framework of Gallager’s first bounding technique (GFBT), where the Gallager region is defined to be an irregular high-dimensional geometry by using a list decoding algorithm. The proposed bound on the bit error probability requires only the knowledge of weight spectra, which is helpful when the input-output weight enumerating function (IOWEF) is not available. Numerical results show that the proposed bound on the bit error probability matches well with the maximum-likelihood (ML) decoding simulation approach especially in the high signal-to-noise ratio (SNR) region, which is better than the recently proposed Ma bound.
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Дисертації з теми "IOwec"

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SIRIGU, SERGEJ ANTONELLO. "Pitch Resonance Tuning Tanks: a novel technology for more efficient wave energy harvesting." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2744935.

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Книги з теми "IOwec"

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American Society of Mechanical Engineers Staff. Print Proceedings of the ASME 2019 IOWTC 2nd International Offshore Wind Technical Conference (IOWTC2019). A S M E Press, 2020.

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2

Fournaris, Apostolos P., Konstantinos Lampropoulos, and Eva Marín Tordera. Information and Operational Technology Security Systems: First International Workshop, IOSec 2018, CIPSEC Project, Heraklion, Crete, Greece, September ... Springer, 2019.

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3

Damiani, Ernesto, Joaquin Garcia-Alfaro, Silvio Ranise, Sotiris Ioannidis, Apostolos P. Fournaris, Manos Athanatos, Konstantinos Lampropoulos, et al. Computer Security: ESORICS 2019 International Workshops, IOSec, MSTEC, and FINSEC, Luxembourg City, Luxembourg, September 26–27, 2019, Revised ... Springer, 2020.

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Тези доповідей конференцій з теми "IOwec"

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Aggarwal, Ankita, and Gurmeet Kaur. "Development of an Efficient Indoor Optical System using Different Wavelet Transforms." In International Conference on Women Researchers in Electronics and Computing. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.114.35.

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For an effective communication system whether indoor or outdoor, the most important concern is minimum noise. In this paper, an efficient noise reduction technique is presented using various wavelet transform techniques for indoor optical wireless communication system (IOWC). In IOWC system, Fluorescent Light Interference (FLI) is main source of noise. Here, in this paper three methods are used to reduce the effect of noise from a digital signal. These are Discrete Wavelet Transform (DWT), Stationary Wavelet transform (SWT) and Discrete Wavelet transform-Stationary Wavelet Transform (DWT-SWT). Through sub band coding in DWT the signal is decomposed into lower sub bands of high and low frequency respectively of unequal size; while in SWT the decomposed signal have sub bands of equal size. In DWT-SWT the high frequency components of both DWT and SWT are added. Using Pulse Position Modulation, the comparison between these three techniques is described here to enhance the overall performance of the IOWC system.
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