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Добірка наукової літератури з теми "Closed communications"

Автор: Grafiati

Опубліковано: 8 вересня 2021

Оновлено: 7 лютого 2022

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Статті в журналах з теми "Closed communications"

Hui Liu and Guanghan Xu. "Closed-form blind symbol estimation in digital communications." IEEE Transactions on Signal Processing 43, no. 11 (1995): 2714–23. http://dx.doi.org/10.1109/78.482120.

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Dass, Bal Kishan, and Sapna Jain. "Low-density close-closed loop burst error detecting codes." Korean Journal of Computational & Applied Mathematics 9, no. 1 (January 2002): 231–38. http://dx.doi.org/10.1007/bf03012351.

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MIYANO, Takaya, Kazuhiro NISHIMURA, and Yusuke YOSHIDA. "Chaos-Based Communications Using Open-Plus-Closed-Loop Control." IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E94-A, no. 1 (2011): 282–89. http://dx.doi.org/10.1587/transfun.e94.a.282.

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Nakagawa, Yuta, Shingo Tanaka, Tatsuo Toba, Kenji Matsushita, and Hisashi Morishita. "Near-metal-insensitive antenna for closed space wireless communications." IEICE Communications Express 6, no. 11 (2017): 621–26. http://dx.doi.org/10.1587/comex.2017xbl0117.

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Vagarinho, Jorge, Sara Sardinha, and Ricardo Alves. "An Unusual Complication in Plastic Periodontal Surgery." Case Reports in Dentistry 2020 (November 28, 2020): 1–5. http://dx.doi.org/10.1155/2020/8824246.

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Анотація:

Introduction. Oroantral communications may arise as a result of pathological processes or iatrogenic situations, particularly in oral surgery and implantology, but are uncommon in periodontal plastic surgery. Case Presentation. A healthy 37-year-old female patient with 5 mm Miller Class II recession on the maxillary left second molar was referred for a root coverage procedure. While preparing the recipient bed for the graft, an oroantral communication was created. Schneiderian membrane was sutured to reduce the dimension of the communication and covered with a connective tissue graft. Finally, the flap was laterally and coronally moved, and the patient instructed about postoperative precautions. This procedure allowed to achieve a complete closure of the oroantral communication and good root coverage after an 8-month follow-up. Conclusions. Different authors described different techniques that can be used to close oroantral communications. Nevertheless, in this clinical case, it was shown that the oroantral communication may be closed without having to postpone the periodontal plastic surgery.

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García-Corrales, Celia, Francisco J. Cañete та José F. Paris. "Capacity ofκ-μShadowed Fading Channels". International Journal of Antennas and Propagation 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/975109.

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The ergodic capacity of fading channels modeled with aκ-μshadowed distribution is investigated to derive closed-form expressions. Theκ-μshadowed distribution is of particular interest because it contains, as special cases, other classical ones like one-side Gaussian, Rayleigh, Rician, Nakagami-m,κ-μ, and Rician shadowed distributions. The paper discusses the physical meaning of the distribution parameter variations and also their impact on the channel capacity. These results can be used to study the behavior of different channels like the ones in underwater acoustic communications, land mobile satellite systems, body centric communications, and other wireless communication applications. The analytical closed-form expression results are validated with numerical simulations.

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Saraereh, Omar A., Ashraf Ali, Imran Khan, and Khaled Rabie. "Interference Analysis for Vehicle-to-Vehicle Communications at 28 GHz." Electronics 9, no. 2 (February 5, 2020): 262. http://dx.doi.org/10.3390/electronics9020262.

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High capacity and ultra-reliable vehicular communication are going to be important aspects of beyond 5G communication networks. However, the vehicular communication problem becomes complex at a large scale when vehicles are roaming on the road, while simultaneously communicating with each other. Moreover, at higher frequencies (like 28 GHz), the dynamics of vehicular communication completely shift towards unpredictability and low-reliability. These factors may result in high packet error and a large amount of interference, resulting in regular disruptions in communications. A thorough understanding of performance variations is the key to moving towards the next generation of vehicular networks. With this intent, this article aims to provide a comprehensive interference analysis, wherein the closed-form expressions of packet error probability (PEP) and ergodic capacity are derived. Using the expression of the PEP, diversity analysis is provided which unveils the impact of channel nonlinearities on the performance of interference-constrained vehicular networks. The insights provided here are expected to pave the way for reliable and high capacity vehicular communication networks.

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Fahimi, Farbod. "Vision-Based CubeSat Closed-Loop Formation Control in Close Proximities." Nonlinear Engineering 8, no. 1 (January 28, 2019): 609–18. http://dx.doi.org/10.1515/nleng-2017-0147.

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Abstract A vision based formation and attitude controller has been derived and simulated for the formation keeping of two 3U CubeSats. Four markers are installed on the leader CubeSat. Two cameras are installed on the follower CubeSat. An efficient vision based pose estimation method is used to estimate the pose of the follower with respect to the leader. A Higher-Order Sliding Mode (HOSM) exact differentiator with finite-time convergence is derived to estimate the rate of the follower’s pose parameters. The follower’s pose and its time rate are fedback to HOSM formation and attitude controllers to correct any gradual drift in formation and pose of the follower. The simulations show the effectiveness of the approach, and its feasibility on existing hardware.

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Blankinship, E., B. Smith, H. Holtzman, and W. Bender. "Closed Caption, Open Source." BT Technology Journal 22, no. 4 (October 2004): 151–59. http://dx.doi.org/10.1023/b:bttj.0000047594.85806.c9.

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CHAN, H., and Ü. ÖZGÜNER. "Closed-loop control of systems over a communications network with queues." International Journal of Control 62, no. 3 (September 1995): 493–510. http://dx.doi.org/10.1080/00207179508921553.

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Дисертації з теми "Closed communications"

Yang, Du. "Closed-loop multiple antenna aided wireless communications using limited feedback." Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/162675/.

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The aim of this thesis is to study the design of closed-loop multiple antenna aided wireless communications relying on limited feedback. Multiple antennas may be employed either/both at the transmitter or/and at the receiver, here the latter periodically feeds back some information about the time-varying wireless channel using a limited number of bits. Furthermore, the transmitter then pre-processes the signals to be transmitted according to the received feedback information. This closed-loop multiple antenna aided communication scheme is capable of significantly improving the attainable system performance in terms of increasing the transmission rate or enhancing the transmission integrity. The goal of our research is the efficient acquisition and exploitation of the Channel State Information at the Transmitter (CSIT), with the aid of different transmit preprocessing algorithms. The transmission schemes investigated in this thesis include the Transmit Matched Filter (TxMF), the Transmit Eigen-Beamformer (TxEBF), the linear Multi-User Transmitter (MUT) and a recently proposed MIMO scheme called Spatial Modulation (SM). The entire process of CSIT acquisition is investigated in this thesis, which includes pilot assisted CSI estimation, CSI quantisation at the receiver, as well as CSI reconstruction at the transmitter. A number of novel designs are proposed in order to increase the CSI acquisition efficiency. A range of different CSI quantisers are detailed in Chapter 2, and their performances are evaluated throughout Chapter 3 to Chapter 6. Moreover, a pilot overhead reduction scheme is proposed for pilot assisted CSI estimation in Chapter 3 for rapidly fading channels. A pilot symbol assisted rateless code is also proposed in Chapter 3, which exploits the available pilot symbols not only for channel estimation but also for channel decoding. Furthermore, an Extrinsic Information Transfer (EXIT) Chart optimised Channel Impulse Response (CIR) Quantizer is proposed in Chapter 5, which assists the system in maintaining the lowest possible CSI feedback overhead, while ensuring that an open EXIT-tunnel is still attainable for the sake of achieving an infinitesimally low BER. A soft decoding assisted MIMO CIR recovery scheme is proposed in Chapter 5, which minimises the CIRs’ reconstruction error at the transmitter for noise contaminated feedback. Last but not least, a CSI feedback scheme using channel prediction and predictive vector quantization is also proposed in Chapter 5 for delayed feedback channels. Given feedback CSIT, a number of algorithms are proposed in order to efficiently exploit it. In Chapter 4 a novel Linear Dispersion Code (LDC) aided TxEBF scheme is proposed, which is capable of striking the required trade-off between the maximum attainable diversity gain and the capacity for an arbitrary number of transmit and receive antennas. In the same chapter, an application example using a novel scheme referred to as a TxEBF aided video transmission scheme is proposed, where the encoded video source bits are transmitted through different eigen-beams according to their error sensitivity, so as to improve the decoded video quality at the receiver by employing unequal error protection. Moreover, a feedback-aided phase rotation and a feedback-aided power allocation scheme are proposed in Chapter 6,which achieves beneficial transmit diversity and enhances the robustness of a SM aided MIMO system. By examining the various schemes investigated throughout Chapter 3 to Chapter 6, our five-step guidelines conceived for the design of closed-loop MIMO systems using limited feedback are summarised as follows. The first step is to design appropriate transmit preprocessing schemes under the assumption of having perfect CSIT. Then, the second step is to determine the specific type of the required feedback information, whose entropy has to be as low as possible. Next we design an efficient quantiser based on the statistical properties of the required feedback information. The distortion metric of the quantiser may be the conventional MSE metric, but the employment of a direct data-link-performance related metric is preferable. Moreover, the fourth step is to improve the efficiency and robustness of the quantiser by employing conventional source compression. Finally, the fifth step is the joint optimisation of the data transmission link and the CSI feedback link based on the ultimate target performance metric. This thesis is concentrated on a Frequency Division Duplex (FDD) cellular communication scenario using digitalized feedback information, where theMobile Terminals (MTs) estimate the Down-Link (DL) channel, quantise and feed back the required information to the Base Station (BS) using a bandwidth-limited feedback link, and the BS reconstructs the received CSI feedback information for the sake of throughput or integrity improving the DL transmission. Moreover, the wireless channels are assumed to be slow frequency-flat/narrow-band Rayleigh fading channels. They are mostly assumed to be spatially independent. The scenario of having spatial correlation and Line Of Sight (LOS) transmissions are also considered. Furthermore, both the achievable capacity and the BER performance are evaluated. Iterative decoding is employed in conjunction with channel coding in order to approach the achievable capacity and improve the BER performance.

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Cintuglu, Mehmet Hazar. "Wide-Area Time-Synchronized Closed-Loop Control of Power Systems And Decentralized Active Distribution Networks." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/3031.

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The rapidly expanding power system grid infrastructure and the need to reduce the occurrence of major blackouts and prevention or hardening of systems against cyber-attacks, have led to increased interest in the improved resilience of the electrical grid. Distributed and decentralized control have been widely applied to computer science research. However, for power system applications, the real-time application of decentralized and distributed control algorithms introduce several challenges. In this dissertation, new algorithms and methods for decentralized control, protection and energy management of Wide Area Monitoring, Protection and Control (WAMPAC) and the Active Distribution Network (ADN) are developed to improve the resiliency of the power system. To evaluate the findings of this dissertation, a laboratory-scale integrated Wide WAMPAC and ADN control platform was designed and implemented. The developed platform consists of phasor measurement units (PMU), intelligent electronic devices (IED) and programmable logic controllers (PLC). On top of the designed hardware control platform, a multi-agent cyber-physical interoperability viii framework was developed for real-time verification of the developed decentralized and distributed algorithms using local wireless and Internet-based cloud communication. A novel real-time multiagent system interoperability testbed was developed to enable utility independent private microgrids standardized interoperability framework and define behavioral models for expandability and plug-and-play operation. The state-of-theart power system multiagent framework is improved by providing specific attributes and a deliberative behavior modeling capability. The proposed multi-agent framework is validated in a laboratory based testbed involving developed intelligent electronic device prototypes and actual microgrid setups. Experimental results are demonstrated for both decentralized and distributed control approaches. A new adaptive real-time protection and remedial action scheme (RAS) method using agent-based distributed communication was developed for autonomous hybrid AC/DC microgrids to increase resiliency and continuous operability after fault conditions. Unlike the conventional consecutive time delay-based overcurrent protection schemes, the developed technique defines a selectivity mechanism considering the RAS of the microgrid after fault instant based on feeder characteristics and the location of the IEDs. The experimental results showed a significant improvement in terms of resiliency of microgrids through protection using agent-based distributed communication.

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Amann, Nancy Hilbok. "Closed captioning as a literacy tool for deaf and hard-of-hearing middle school students." Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/282903.

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This study seeks to ascertain the potential influence of television closed-captioning on literacy among deaf and hard-of-hearing children. Television watching has become increasingly popular among deaf and hard-of-hearing children (Hobbs, 2005), and past studies show exciting potential for the use of closed-captioning as a literacy tool (Koskinen, Wilson & Jensema, 1985; Jensema, McCann & Ramsey, 1996). The study took place over 5 weeks and was conducted with 13 middle school students at a school for the deaf. As part of the study, the 13 students were shown 10 different 30-minute captioned video segments of different genres and interests. Prior to and after each showing, the students took pre-and-post tests containing five vocabulary words that appeared in the video shown. (Each post-test contained the same five words appearing in its corresponding pre-test.) In addition, after each showing, the students engaged in classroom discussions on the recently-viewed video program, which were observed and analyzed. The findings--and, in particular, the pre-and post-test scores--showed marked improvement in vocabulary scores after each captioned program viewing. The findings also potentially indicate that closed-captioning can expose deaf and hard-of-hearing children to new and unfamiliar words to which they otherwise would not be exposed. In addition, the post-viewing discussions indicated that, throughout the study, the students employed the tri-level literacy framework, using functional, cultural, and critical literacy. And, by discussing in American Sign Language (ASL) the recently-viewed captions, the students employed linguistic interdependence, or the use of dominant and secondary languages to reinforce development in both. Closed captioning also proved to be a useful source of "triggering" words, which generated experience and funds-of-knowledge recollection among the students. As a part of media literacy, closed-captioning is a motivating tool that teachers can use to activate prior knowledge among deaf students. In sum, this study shows that closed-captioning can positively impact literacy levels among deaf and hard-of-hearing students. Accordingly, closed-captioning can play a useful role in developing literacy, and parents and educators of deaf children should devise ways to incorporate closed-captioning as part of the deaf child's literacy environment.

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Gibbs, Joseph Thomas. "Mass communication and political change in the closed society: a qualitative assessment of glasnostʹ during the first phase of perestroika, 1985-1988". Thesis, Boston University, 1994. https://hdl.handle.net/2144/35433.

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Thesis (Ph.D.)--Boston University
PLEASE NOTE: No public access is forecasted for this work. To request access, please click on the locked Download file link and fill out the appropriate web form.
2031-01-01

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Saarinen, I. (Ilkka). "Reverse link feedback power control in pilot symbol assisted systems." Doctoral thesis, University of Oulu, 2000. http://urn.fi/urn:isbn:9514257626.

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Abstract Reverse link feedback power control in subject to a feedback delay and in conjuction with diversity is considered over a frequency-nonselective slow Rayleigh fading channel. The transmission power of a mobile station is adjusted as a function of fed back estimated channel state information, so that the average error probability is minimized when the average transmission power is fixed. The channel state is estimated by using known, constant-power pilot symbols. In each frame, a time multiplexed pilot symbol is transmitted in addition to the antipodal data symbols. In the literature, feedback MMSE (minimum mean-square error) power control has been analyzed in the case of a random time-invariant channel. Therein the frame size was two, i.e. one data and one pilot symbol were transmitted in each frame. Also, the fading gain was estimated by a one-shot MMSE estimator. This author's main contribution is that the aforementioned analysis has been extended to a more general system model in which the frame size is arbitrary, and in which the time-variant fading gain is estimated by an optimal MMSE estimator. For power control purposes, the estimator has to be a predictor since feedback requires causality. First, in order to avoid a delay in detection, the predictor is used in both power control and detection. In the case of a frame size of two, the performance of feedback MMSE power control employing the predictor is compared to that of a system using the one-shot estimator. Then, the performance of feedback MMSE power control with an optimal frame size is evaluated. Finally, the system performance is derived when a smoother is employed in detection, and the additional effects of a feedback delay and diversity on the performance are investigated. The performance difference between optimal (channel states are assumed to be known) and MMSE power control using a one-shot estimator is found to be significant at large signal-to-noise ratios (SNR's). This is in contradiction with the result presented earlier in the literature. The reason for the large performance difference is that the SNR of the channel estimate is small, since each estimate is computed using only one pilot symbol. The performance difference between optimal and MMSE power control with the predictor is smaller than said difference in the case of the one-shot estimator because the estimate is averaged over many pilot symbols. It is also observed that the lag error of the estimator considerably reduces the benefit of MMSE power control, even when the channel changes very slowly. To diminish the lag error, and to achieve good performance, a large number of estimator coefficients is required. It is well known that fixed-step adjustment closed loop power control attempts to compensate for all changes caused by the channel. In contrast, according to Monte Carlo simulations, MMSE power control did not attempt to compensate for the deepest fades. At other time instants, it strives to set the received SNR to an approximately constant level, which depends on the bit-error rate (BER) target. Increasing the frame size from the value of two not only improves the spectrum utilization, but was also shown to yield better performance for the pilot symbol system with MMSE power control over a slowly fading channel. Also, a clear performance improvement was achieved by using the smoother in detection. The performance loss resulting from a feedback delay of 10-20 % from the channel coherence time was shown to be small with reasonable BER values. Estimation errors were shown to diminish the benefit of power control when the diversity order was two, compared to the case of no diversity.

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Deike, William D. "Airborne protected military satellite communications : analysis of open-loop pointing and closed-loop tracking with noisy platform attitude information." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/85767.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 159-162).
U.S. military assets' increasing need for secure global communications has led to the design and fabrication of airborne satellite communication terminals that operate under protected security protocol. Protected transmission limits the closed-loop tracking options to eliminate pointing error in the open-loop pointing solution. In an airborne environment, aircraft disturbances and noisy attitude information affect the open-loop pointing performance. This thesis analyzes the open-loop pointing and closed-loop tracking performance in the presence of open-loop pointing error and uncertainty in the received signal to assess hardware options relative to performance requirements. Results from the open-loop analysis demonstrate unexplained harmonics at integer frequencies while the aircraft is banked, azimuth and elevation errors independent of the inertial pointing vector and aircraft's yaw angle, and uncorrelated azimuth and elevation errors for aircraft pitch and roll angles of +/-10° and +/-30°, respectively. Several conclusions are drawn from the closed-loop tracking analysis. The distribution of the average noise power has a stronger influence than the distribution of the received isotropic power on the signal-to-noise ratio distribution. The defined step-tracking algorithm reduces pointing error in the open-loop pointing solution for a pedestal experiencing aircraft disturbances and random errors from the GPS/INS. The rate of performance improvement as a function of the number of hops is independent of the antenna aperture size and the GPS/INS unit. Pointing performance relative to the HPBW is independent of the antenna aperture size and GPS/INS unit for on-boresight, but not for off-boresight. With signal-to-noise ratios averaged over 100 hops and pointing biases less than or equal to 0.5 the half-power beamwidth, the step-tracking algorithm reduces the pointing error to within 0.1 the half-power beamwidth of the boresight, for all tested configurations. The overall system performance is bounded by the open-loop pointing solution, which is based on hardware selection. Closed-loop tracking performance is a function of the number of sampled hops and is for the most part independent of the hardware selection.
by William D. Deike.
S.M.

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Sarr, Ndéye Bineta. "Communications protocols for wireless sensor networks in perturbed environment." Thesis, Poitiers, 2019. http://www.theses.fr/2019POIT2255/document.

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Cette thèse s'inscrit dans le domaine du Smart Grid. Les SGs améliorent la sécurité des réseaux électriques et permettent une utilisation adaptée de l'énergie disponible de manière limitée. Ils augmentent également l'efficacité énergétique globale en réduisant la consommation. L'utilisation de cette technologie est la solution la plus appropriée car elle permet une gestion plus efficace de l'énergie. Dans ce contexte, des compagnies comme Hydro-Québec déploient des réseaux de capteurs pour contrôler les principaux équipements. Pour réduire les coûts de déploiement et la complexité du câblage, un réseau de capteurs semble être une solution optimale. Cependant, son déploiement nécessite une connaissance approfondie de l'environnement. Les postes à haute tension sont des points stratégiques du réseau électrique et génèrent un bruit impulsif qui dégrade les performances des communications sans fil. Les travaux dans cette thèse sont centrés sur le développement de protocoles de communication performants dans ces milieux fortement perturbés. Nous avons proposé une première approche basée sur la concaténation du code à métrique de rang et le code convolutif avec la modulation OFDM. C'est une technique très efficace pour réduire l'effet du bruit impulsif tout en ayant un niveau de complexité assez faible. Une autre solution basée sur un système multi-antennaire est développée. Nous avons aussi proposé un système MIMO coopératif codé en boucle fermée basée sur le code à métrique de rang et le précodeur max-dmin. La deuxième technique est également une solution optimale pour améliorer la fiabilité du système et réduire la consommation énergétique dans les réseaux de capteurs
This thesis is mainly in the Smart Grid domain. SGs improve the safety of electrical networks and allow a more adapted use of electricity storage, available in a limited way. SGs also increase overall energy efficiency by reducing peak consumption. The use of this technology is the most appropriate solution because it allows more efficient energy management. In this context, manufacturers such as Hydro-Quebec deploy sensor networks in the nerve centers to control major equipment. To reduce deployment costs and cabling complexity, the option of a wireless sensor network seems the most obvious solution. However, deploying a sensor network requires in-depth knowledge of the environment. High voltages substations are strategic points in the power grid and generate impulse noise that can degrade the performance of wireless communications. The works in this thesis are focused on the development of high performance communication protocols for the profoundly disturbed environments. For this purpose, we have proposed an approach based on the concatenation of rank metric and convolutional coding with orthogonal frequency division multiplexing. This technique is very efficient in reducing the bursty nature of impulsive noise while having a quite low level of complexity. Another solution based on a multi-antenna system is also designed. We have proposed a cooperative closed-loop coded MIMO system based on rank metric code and max-dmin precoder. The second technique is also an optimal solution for both improving the reliability of the system and energy saving in wireless sensor networks

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Sitter, Deanna-Lea Carleton University Dissertation Law. "Sexual harassment and communication; opening a closed discourse." Ottawa, 1996.

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Pound, David S. "Contribution of digitized communications to the Extended Close Battlefield." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA285527.

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Sarin, Anika. "open / close: assimilating immersive spaces in visual communication." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4876.

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I am interested in two spaces obverse to each other: open and closed. An open space develops organically based on how people inhabit it. Interacting with an open space is a dynamic, sporadic, multisensory, immersive, and subjective experience. In such spaces, we are confronted with an alternative aesthetic, one that is in conflict with the seamlessness of a closed space. A closed space is anchored on definite variables like structure, use and boundaries. While interaction between people and space is important, the space is tightly controlled and interaction is designed. Through this thesis project, I present a method that metaphorically transforms the experience of a walk through a closed space into an open-ended and immersive experience. When space develops as a response to our actions, it affords intimacy and a sense of belonging. It facilitates deeper expressiveness through engagement. By applying a method that uses fragmentation, recurrence and motion, I am metaphorically transforming an urban closed space to open. Through this transformation I am creating a fresh person-space dialogue that temporarily destabilizes perception and encourages physical sensation which allows for an intimate experience of the space. An immersive interaction with an open space transgresses the urban sterility of a closed space and is capable of creating a diversity of distinct experiences.

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Книги з теми "Closed communications"

Day, Frederick J. Policies and practices in the regulation of private radio communications systems. Arlington, Va. (1110 N. Glebe Rd., Suite 500, Arlington 22201-5720): Industrial Telecommunications Association, 1994.

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United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Communications, Technology, and the Internet. H.R. 3101, Twenty-first Century Communications and Video Accessibility Act of 2009: Hearing before the Subcommittee on Communications, Technology, and the Internet of the Committee on Energy and Commerce, House of Representatives, One Hundred Eleventh Congress, second session, June 10, 2010. Washington: U.S. Government Printing Office, 2013.

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United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Communications. TV Decoder Circuitry Act of 1989: Hearing before the Subcommittee on Communications of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred First Congress, second session on S. 1974 ... June 20, 1990. Washington: U.S. G.P.O., 1990.

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Media networks: Architectures, applications, and standards. Boca Raton, FL: Taylor & Francis, 2012.

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Pearce, Ross. Closed out. Littleton, MA: Sundance, 2003.

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Radio communication at close range. Delhi: B.R. Pub. Corp., 2010.

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Kory, Floyd, ed. Nonverbal communication in close relationships. Mahwah, N.J: Lawrence Erlbaum Associates, 2005.

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Guerrero, Laura K. Nonverbal communication in close relationships. Mahwah, NJ: Lawrence Erlbaum Associates, 2006.

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A, Andersen Peter, and Afifi Walid A, eds. Close encounters: Communication in relationships. 2nd ed. Thousand Oaks: Sage Publications, 2007.

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Частини книг з теми "Closed communications"

Mashreghi, Javad, and Thomas Ransford. "Approximation in the Closed Unit Ball." In Fields Institute Communications, 89–129. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-7543-3_5.

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Stephens, Donald R. "Digital Closed Loop Analysis." In Phase-Locked Loops for Wireless Communications, 153–81. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5717-3_6.

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Hilali, Ines, Tao-Yuan Jen, Dominique Laurent, Claudia Marinica, and Sadok Ben Yahia. "Mining Frequent and Homogeneous Closed Itemsets." In Communications in Computer and Information Science, 51–65. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38901-1_4.

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Liu, Fuwen, and Hartmut Koenig. "Efficient Key Distribution for Closed Meetings in the Internet." In Communications and Multimedia Security, 271–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11552055_30.

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Martorell, Gabriel, Felip Riera-Palou, and Guillem Femenias. "Closed-Loop Adaptive IEEE 802.11n with PHY/MAC Cross-Layer Constraints." In Multiple Access Communications, 63–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23795-9_6.

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Knight, Jonathan Kipling, and Sudhanshu Kumar Semwal. "Unbiased Closed-Form Solutions for Center of Rotation." In Communications in Computer and Information Science, 73–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11840-1_6.

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Zhang, Linlin, Ming Gao, Nan Zhang, and Peng Yang. "Distributed Closed-Loop QOSTBCs with PIC Detector Under Quasi-Synchronization." In Wireless Communications, Networking and Applications, 707–16. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2580-5_63.

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Xiao, Jihai, Xiaohong Cui, and Junjie Chen. "Frequent Closed Pattern Mining Algorithm Based on COFI-Tree." In Communications in Computer and Information Science, 175–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24282-3_24.

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Silva Mendoza, Steven, Dennys F. Paillacho Chiluiza, David Soque León, María Guerra Pintado, and Jonathan S. Paillacho Corredores. "Autonomous Intelligent Navigation for Mobile Robots in Closed Environments." In Communications in Computer and Information Science, 391–402. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71503-8_30.

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Dimitrov, Darko, Mathias Holst, Christian Knauer, and Klaus Kriegel. "Closed-Form Solutions for Continuous PCA and Bounding Box Algorithms." In Communications in Computer and Information Science, 26–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-10226-4_3.

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Тези доповідей конференцій з теми "Closed communications"

Lantto, Heikki, Juha Kukkola, Bernt Akesson, Juha-Pekka Nikkarila, and Mari Ristolainen. "Wargaming a Closed National Network." In MILCOM 2018 - IEEE Military Communications Conference. IEEE, 2018. http://dx.doi.org/10.1109/milcom.2018.8599816.

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Jo, Han-Shin, Ping Xia, and Jeffrey G. Andrews. "Downlink Femtocell Networks: Open or Closed?" In ICC 2011 - 2011 IEEE International Conference on Communications. IEEE, 2011. http://dx.doi.org/10.1109/icc.2011.5962618.

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Tarasak, Poramate, Tony Q. S. Quek, and Francois Chin. "Closed Access OFDMA Femtocells under Timing Misalignment." In GLOBECOM 2010 - 2010 IEEE Global Communications Conference. IEEE, 2010. http://dx.doi.org/10.1109/glocom.2010.5683959.

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Oztufan, Huseyin Efe, Goktug Yildirim, and Ebru Arisoy. "Highlighting of Lecture Video Closed Captions." In 2020 28th Signal Processing and Communications Applications Conference (SIU). IEEE, 2020. http://dx.doi.org/10.1109/siu49456.2020.9302077.

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Sychev, Ilya, Abdelrahman Abdelkader, Wojciech Kozak, Riccardo Bonetto, and Frank H. P. Fitzek. "Closed Loop Benchmark for Timeseries Databases." In 2020 IEEE 17th Annual Consumer Communications & Networking Conference (CCNC). IEEE, 2020. http://dx.doi.org/10.1109/ccnc46108.2020.9045409.

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Junyeong Bok, Heung-Gyoon Ryu, Byung Gak Jo, and Gwang Hoon Baek. "Closed-loop satellite communication system for high efficiency transmission." In 2012 18th Asia-Pacific Conference on Communications (APCC). IEEE, 2012. http://dx.doi.org/10.1109/apcc.2012.6388130.

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Xu, Zhengyuan, Ning Liu, and Brian M. Sadler. "A Simple Closed-Form Linear Source Localization Algorithm." In MILCOM 2007 - IEEE Military Communications Conference. IEEE, 2007. http://dx.doi.org/10.1109/milcom.2007.4454975.

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Basu, Pranab, and Navin Kashyap. "On linear subspace codes closed under intersection." In 2015 Twenty First National Conference on Communications (NCC). IEEE, 2015. http://dx.doi.org/10.1109/ncc.2015.7084870.

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Cho, P. S., J. B. Khurgin, and I. Shpantzer. "Closed-Loop Control of LiNbO3 Quadrature Modulator for Coherent Communications." In Coherent Optical Technologies and Applications. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/cota.2006.cthc2.

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Rafati, Amirhossein, Mehrzad Biguesh, and Saeed Gazor. "Closed loop QR decomposition based receiver for MIMO communication systems." In 2008 24th Biennial Symposium on Communications (QBSC). IEEE, 2008. http://dx.doi.org/10.1109/bsc.2008.4563220.

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Звіти організацій з теми "Closed communications"

Deike, William D., and Timothy M. Gallagher. Airborne Protected Military Satellite Communications: Analysis of Open-Loop Pointing and Closed-Loop Tracking with Noisy Platform Attitude Information. Fort Belvoir, VA: Defense Technical Information Center, April 2011. http://dx.doi.org/10.21236/ada569701.

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Finley, Dorothy L. Simulation-Based Communications Realism and Platoon Training in the Close Combat Tactical Trainer. Fort Belvoir, VA: Defense Technical Information Center, June 1997. http://dx.doi.org/10.21236/ada337692.

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Michael, James B., George Dinolt, Doron Drusinsky, Loren Peitso, Thomas Otani, and Man-Tak Shing. Leveraging the Cloud to Support Communications in the Tactical Environment. Fort Belvoir, VA: Defense Technical Information Center, December 2011. http://dx.doi.org/10.21236/ada555277.

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Barna, La Ray. An empirical study of the effect of systematic relaxation training of chronically-anxious subjects on the communication variable of closed-mindedness. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.110.

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Small, Ed, and Louise Clark. ALRE Stakeholder Survey Analysis Key Findings. Institute of Development Studies (IDS), November 2020. http://dx.doi.org/10.19088/apra.2020.014.

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This summary shares the results of a stakeholder survey on the policy issues and demand for evidence related to inclusive agricultural commercialisation across Africa by the Accompanied Learning for Relevance and Effectiveness (ALRE) team of the Agricultural Policy Research in Africa (APRA) programme. The survey collected data between January and March 2020 on a series of closed questions to i) understand the top five policy priorities to support agricultural commercialisation and the most effective communication methods, and ii) the different factors and the role of research to influence inclusive agricultural commercialisation.

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Solovyanenko, Nina I. Legal features of innovative (digital) entrepreneurship in the agricultural and food sector. DOI CODE, 2021. http://dx.doi.org/10.18411/0131-5226-2021-70008.

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Modern agricultural production and food trade are involved in the process of digital transformation, which is a cardinal factor of sustainable development and is carried out on the basis of IT platforms, the Internet of Things, cloud computing, big data, artificial intelligence, blockchain technologies. The COVID-19 pandemic has increased the dependence of these sectors of the economy on information and communication technology infrastructure and services. At the same time, the slow updating of legislation, which lags behind the constantly improving digital technologies, not only hinders their implementation, but also is a source of a number of social and legal problems. A modern regulatory framework based on digital strategies should strengthen "smart agriculture". In Russia, the legal mechanism of digital transformation and development of the national platform "Digital Agriculture" should be supported by updated basic legislation.

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Pavlyuk, Ihor. MEDIACULTURE AS A NECESSARY FACTOR OF THE CONSERVATION, DEVELOPMENT AND TRANSFORMATION OF ETHNIC AND NATIONAL IDENTITY. Ivan Franko National University of Lviv, February 2021. http://dx.doi.org/10.30970/vjo.2021.49.11071.

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The article deals with the mental-existential relationship between ethnoculture, national identity and media culture as a necessary factor for their preservation, transformation, on the example of national original algorithms, matrix models, taking into account global tendencies and Ukrainian archetypal-specific features in Ukraine. the media actively serve the domestic oligarchs in their information-virtual and real wars among themselves and the same expansive alien humanitarian acts by curtailing ethno-cultural programs-projects on national radio, on television, in the press, or offering the recipient instead of a pop pointer, without even communicating to the audience the information stipulated in the media laws − information support-protection-development of ethno-culture national product in the domestic and foreign/diaspora mass media, the support of ethnoculture by NGOs and the state institutions themselves. In the context of the study of the cultural national socio-humanitarian space, the article diagnoses and predicts the model of creating and preserving in it the dynamic equilibrium of the ethno-cultural space, in which the nation must remember the struggle for access to information and its primary sources both as an individual and the state as a whole, culture the transfer of information, which in the process of globalization is becoming a paramount commodity, an egregore, and in the post-traumatic, interrupted-compensatory cultural-information space close rehabilitation mechanisms for national identity to become a real factor in strengthening the state − and vice versa in the context of adequate laws («Law about press and other mass media», Law «About printed media (press) in Ukraine», Law «About Information», «Law about Languages», etc.) and their actual effect in creating motivational mechanisms for preserving/protecting the Ukrainian language, as one of the main identifiers of national identity, information support for its expansion as labels cultural and geostrategic areas.

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Improving USDA Response to Reducing the Risks of Drought and Storms and Increasing Sustainability in Agriculture in the Caribbean. USDA Caribbean Climate Hub, September 2018. http://dx.doi.org/10.32747/2018.6943418.ch.

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The success of the Climate Hubs in transferring management practices, decision tools, and information to land management stakeholders can be achieved through close coordination with USDA agencies, regional universities, and non-governmental partners. Partnerships are key to establishing communication between landowners, managers, farmers, and the research community and in establishing coordination within the science and tech-transfer community.

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African Open Science Platform Part 1: Landscape Study. Academy of Science of South Africa (ASSAf), 2019. http://dx.doi.org/10.17159/assaf.2019/0047.

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This report maps the African landscape of Open Science – with a focus on Open Data as a sub-set of Open Science. Data to inform the landscape study were collected through a variety of methods, including surveys, desk research, engagement with a community of practice, networking with stakeholders, participation in conferences, case study presentations, and workshops hosted. Although the majority of African countries (35 of 54) demonstrates commitment to science through its investment in research and development (R&D), academies of science, ministries of science and technology, policies, recognition of research, and participation in the Science Granting Councils Initiative (SGCI), the following countries demonstrate the highest commitment and political willingness to invest in science: Botswana, Ethiopia, Kenya, Senegal, South Africa, Tanzania, and Uganda. In addition to existing policies in Science, Technology and Innovation (STI), the following countries have made progress towards Open Data policies: Botswana, Kenya, Madagascar, Mauritius, South Africa and Uganda. Only two African countries (Kenya and South Africa) at this stage contribute 0.8% of its GDP (Gross Domestic Product) to R&D (Research and Development), which is the closest to the AU’s (African Union’s) suggested 1%. Countries such as Lesotho and Madagascar ranked as 0%, while the R&D expenditure for 24 African countries is unknown. In addition to this, science globally has become fully dependent on stable ICT (Information and Communication Technologies) infrastructure, which includes connectivity/bandwidth, high performance computing facilities and data services. This is especially applicable since countries globally are finding themselves in the midst of the 4th Industrial Revolution (4IR), which is not only “about” data, but which “is” data. According to an article1 by Alan Marcus (2015) (Senior Director, Head of Information Technology and Telecommunications Industries, World Economic Forum), “At its core, data represents a post-industrial opportunity. Its uses have unprecedented complexity, velocity and global reach. As digital communications become ubiquitous, data will rule in a world where nearly everyone and everything is connected in real time. That will require a highly reliable, secure and available infrastructure at its core, and innovation at the edge.” Every industry is affected as part of this revolution – also science. An important component of the digital transformation is “trust” – people must be able to trust that governments and all other industries (including the science sector), adequately handle and protect their data. This requires accountability on a global level, and digital industries must embrace the change and go for a higher standard of protection. “This will reassure consumers and citizens, benefitting the whole digital economy”, says Marcus. A stable and secure information and communication technologies (ICT) infrastructure – currently provided by the National Research and Education Networks (NRENs) – is key to advance collaboration in science. The AfricaConnect2 project (AfricaConnect (2012–2014) and AfricaConnect2 (2016–2018)) through establishing connectivity between National Research and Education Networks (NRENs), is planning to roll out AfricaConnect3 by the end of 2019. The concern however is that selected African governments (with the exception of a few countries such as South Africa, Mozambique, Ethiopia and others) have low awareness of the impact the Internet has today on all societal levels, how much ICT (and the 4th Industrial Revolution) have affected research, and the added value an NREN can bring to higher education and research in addressing the respective needs, which is far more complex than simply providing connectivity. Apart from more commitment and investment in R&D, African governments – to become and remain part of the 4th Industrial Revolution – have no option other than to acknowledge and commit to the role NRENs play in advancing science towards addressing the SDG (Sustainable Development Goals). For successful collaboration and direction, it is fundamental that policies within one country are aligned with one another. Alignment on continental level is crucial for the future Pan-African African Open Science Platform to be successful. Both the HIPSSA ((Harmonization of ICT Policies in Sub-Saharan Africa)3 project and WATRA (the West Africa Telecommunications Regulators Assembly)4, have made progress towards the regulation of the telecom sector, and in particular of bottlenecks which curb the development of competition among ISPs. A study under HIPSSA identified potential bottlenecks in access at an affordable price to the international capacity of submarine cables and suggested means and tools used by regulators to remedy them. Work on the recommended measures and making them operational continues in collaboration with WATRA. In addition to sufficient bandwidth and connectivity, high-performance computing facilities and services in support of data sharing are also required. The South African National Integrated Cyberinfrastructure System5 (NICIS) has made great progress in planning and setting up a cyberinfrastructure ecosystem in support of collaborative science and data sharing. The regional Southern African Development Community6 (SADC) Cyber-infrastructure Framework provides a valuable roadmap towards high-speed Internet, developing human capacity and skills in ICT technologies, high- performance computing and more. The following countries have been identified as having high-performance computing facilities, some as a result of the Square Kilometre Array7 (SKA) partnership: Botswana, Ghana, Kenya, Madagascar, Mozambique, Mauritius, Namibia, South Africa, Tunisia, and Zambia. More and more NRENs – especially the Level 6 NRENs 8 (Algeria, Egypt, Kenya, South Africa, and recently Zambia) – are exploring offering additional services; also in support of data sharing and transfer. The following NRENs already allow for running data-intensive applications and sharing of high-end computing assets, bio-modelling and computation on high-performance/ supercomputers: KENET (Kenya), TENET (South Africa), RENU (Uganda), ZAMREN (Zambia), EUN (Egypt) and ARN (Algeria). Fifteen higher education training institutions from eight African countries (Botswana, Benin, Kenya, Nigeria, Rwanda, South Africa, Sudan, and Tanzania) have been identified as offering formal courses on data science. In addition to formal degrees, a number of international short courses have been developed and free international online courses are also available as an option to build capacity and integrate as part of curricula. The small number of higher education or research intensive institutions offering data science is however insufficient, and there is a desperate need for more training in data science. The CODATA-RDA Schools of Research Data Science aim at addressing the continental need for foundational data skills across all disciplines, along with training conducted by The Carpentries 9 programme (specifically Data Carpentry 10 ). Thus far, CODATA-RDA schools in collaboration with AOSP, integrating content from Data Carpentry, were presented in Rwanda (in 2018), and during17-29 June 2019, in Ethiopia. Awareness regarding Open Science (including Open Data) is evident through the 12 Open Science-related Open Access/Open Data/Open Science declarations and agreements endorsed or signed by African governments; 200 Open Access journals from Africa registered on the Directory of Open Access Journals (DOAJ); 174 Open Access institutional research repositories registered on openDOAR (Directory of Open Access Repositories); 33 Open Access/Open Science policies registered on ROARMAP (Registry of Open Access Repository Mandates and Policies); 24 data repositories registered with the Registry of Data Repositories (re3data.org) (although the pilot project identified 66 research data repositories); and one data repository assigned the CoreTrustSeal. Although this is a start, far more needs to be done to align African data curation and research practices with global standards. Funding to conduct research remains a challenge. African researchers mostly fund their own research, and there are little incentives for them to make their research and accompanying data sets openly accessible. Funding and peer recognition, along with an enabling research environment conducive for research, are regarded as major incentives. The landscape report concludes with a number of concerns towards sharing research data openly, as well as challenges in terms of Open Data policy, ICT infrastructure supportive of data sharing, capacity building, lack of skills, and the need for incentives. Although great progress has been made in terms of Open Science and Open Data practices, more awareness needs to be created and further advocacy efforts are required for buy-in from African governments. A federated African Open Science Platform (AOSP) will not only encourage more collaboration among researchers in addressing the SDGs, but it will also benefit the many stakeholders identified as part of the pilot phase. The time is now, for governments in Africa, to acknowledge the important role of science in general, but specifically Open Science and Open Data, through developing and aligning the relevant policies, investing in an ICT infrastructure conducive for data sharing through committing funding to making NRENs financially sustainable, incentivising open research practices by scientists, and creating opportunities for more scientists and stakeholders across all disciplines to be trained in data management.

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