Results 21 to 30 of about 44,293 (214)

The Effect of Storage Temperature on Threat Zone Caused by an Ammonia Release from a Storage Tank

open access: yesHittite Journal of Science and Engineering, 2022
In this study, the threat zone that may occur as a result of an accidental release of an-hydrous ammonia, a flammable and highly toxic substance (Flammability:1, Health:3, NFPA 704), which has many uses, was investigated.
Abdurrahman Akman, Mustafa Serhat Ekinci
doaj   +1 more source

Cosmopolitan pleasures and affects; or why are we still talking about yellowface in twenty-first-century cinema?: The crisis of representation and interactive documentary as an agent of change

open access: yesAlphaville: Journal of Film and Screen Media, 2018
It is now widely acknowledged that the postracial fantasies ushered in by Barack Obama’s two-term election success are now in tatters. Yet debates on yellowface casting practices in contemporary Hollywood (also said to have evolved into “whitewashing ...
Felicia Chan
doaj   +1 more source

Adaptive schemes for packet data in a ds-cdma environment [PDF]

open access: yes, 1997
This paper presents a novel adaptive DS-CDMA slotted-ALOHA packet random access scheme for improving the throughput of the conventional DS-CDMA slotted-ALOHA system.
Agustí Comes, Ramon   +1 more
core   +1 more source

Оценка эффективности случайного множественного доступа к среде типа ALOHA при голосовых соединениях, передаче служебных команд, текстовых сообщений и мультимедийных файлов в условиях деструктивных воздействий

open access: yesИнформатика и автоматизация, 2019
Оценка защищенности сетей цифровой радиосвязи при деструктивных воздействиях злоумышленника является важной задачей. Однако для случайного множественного доступа к среде типа ALOHA в сетях цифровой радиосвязи такая оценка не проводилась.
Maksim Anatol'evich Peregudov   +1 more
doaj   +1 more source

ALOHA with Queue Sharing

open access: yes2020 IEEE 17th International Conference on Mobile Ad Hoc and Sensor Systems (MASS), 2020
ALOHA with Queue Sharing (ALOHA-QS) maintains most of the simplicity of ALOHA with priority acknowledgments (ACK) and attains the high throughput of transmission scheduling methods that require clock synchronization. Channel access with ALOHA-QS consists of a sequence of queue cycles, with each cycle having one or multiple collision-free transmissions ...
Garcia-Luna-Aceves, J.J.   +2 more
openaire   +2 more sources

DR-ALOHA-Q: A Q-Learning-Based Adaptive MAC Protocol for Underwater Acoustic Sensor Networks

open access: yesSensors, 2023
Underwater acoustic sensor networks (UASNs) are challenged by the dynamic nature of the underwater environment, large propagation delays, and global positioning system (GPS) signal unavailability, which make traditional medium access control (MAC ...
Slavica Tomovic, Igor Radusinovic
doaj   +1 more source

ALOHA Random Access that Operates as a Rateless Code [PDF]

open access: yes, 2013
Various applications of wireless Machine-to-Machine (M2M) communications have rekindled the research interest in random access protocols, suitable to support a large number of connected devices.
Popovski, Petar, Stefanovic, Cedomir
core   +2 more sources

Packet Flow Based Reinforcement Learning MAC Protocol for Underwater Acoustic Sensor Networks

open access: yesSensors, 2021
Medium access control (MAC) is one of the key requirements in underwater acoustic sensor networks (UASNs). For a MAC protocol to provide its basic function of efficient sharing of channel access, the highly dynamic underwater environment demands MAC ...
Ibrahim B. Alhassan, Paul D. Mitchell
doaj   +1 more source

Delay distributions of slotted ALOHA and CSMA [PDF]

open access: yes, 2003
We derive the closed-form delay distributions of slotted ALOHA and nonpersistent carrier sense multiple access (CSMA) protocols under steady state. Three retransmission policies are analyzed. We find that under a binary exponential backoff retransmission
Yang, Y, Yum, TSP
core   +1 more source

Application of ZigZag Decoding in Frameless ALOHA

open access: yesIEEE Access, 2019
As ZigZag decoding (ZD) can resolve a collision between two packets, the combination of ZD and successive interference cancellation (SIC) is expected to provide a lower packet loss rate (PLR) and higher average throughput than the conventional frameless ...
Shun Ogata, Koji Ishibashi
doaj   +1 more source

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