scholarly journals SYSTEMATIZATION OF APPROACHES TO THE DEVELOPMENT OF QUALITY SYSTEMS INDICATORS AND NETWORK SERVICES RELIABILITY

T-Comm ◽  
2021 ◽  
Vol 15 (5) ◽  
pp. 58-61
Author(s):  
Zain-aalabdain Al-namer ◽  
Keyword(s):  
Network Services ◽  
Next Generation ◽  
Communications Networks ◽  
New Class ◽  
Long Period ◽  
Voice Traffic ◽  
Time Parameters ◽  
New Applications ◽  
Further Development ◽  
General User

Over a long period of development of the network communication general user (NCGU), various models have been developed, focused on the service of voice traffic. In the next generation NGN heterogeneous communication network, voice traffic service has become one of the applications. This application was subject to stringent timing requirements (latency and loss). Further development took place to develop new applications that impose even more severe service requirements. Such applications have had a significant impact on the requirements and timing of next generation communications networks. In this regard, it was proposed in various recommendations to distinguish networks that provide services with strict requirements for time parameters into a new class of networks and call them networks with low and ultra-low delays.

Nickel-Catalyzed Inter- and Intramolecular Carbon-Sulfur Bond Metathesis by Reversible Arylation

2019 ◽  
Author(s):  
Tristan Delcaillau ◽  
Alessandro Bismuto ◽  
Zhong Lian ◽  
Bill Morandi
Keyword(s):  
Good Yield ◽  
Functional Group ◽  
Product Formation ◽  
Single Bond ◽  
Ring Closing Metathesis ◽  
Catalytic Systems ◽  
Metathesis Reactions ◽  
New Applications ◽  
Further Development ◽  
Sulfur Bond

A nickel-catalyzed carbon-sulfur bond metathesis has been developed to access high-value thioethers. 1,2-bis(dicyclohexylphosphino)ethane (dcype) is essential to promote this highly functional group tolerant reaction. Further, synthetically challenging macrocycles could be obtained in good yield in an unusual example of ring-closing metathesis which does not involve alkene bonds. In-depth organometallic studies support a reversible Ni(0)-Ni(II) pathway to product formation. Overall, this work does not only disclose a more sustainable and more functional group tolerant alternative to previous catalytic systems based on Pd, but also presents new applications and mechanistic information which are highly relevant to the further development and application of unusual single bond metathesis reactions.

UAS Pilot Assessments of Display and Alerting for the Airborne Collision Avoidance System XU

2020 ◽  
Vol 64 (1) ◽  
pp. 159-163
Author(s):  
Casey L. Smith ◽  
R. Conrad Rorie ◽  
Kevin J. Monk ◽  
Jillian Keeler ◽  
Garrett G. Sadler
Keyword(s):  
Collision Avoidance ◽  
Unmanned Aircraft ◽  
Unmanned Aircraft Systems ◽  
Next Generation ◽  
National Airspace System ◽  
Aircraft Systems ◽  
Collision Avoidance System ◽  
Further Development ◽  
Initial Iteration ◽  
Integrated Display

Unmanned aircraft systems (UAS) must comply with specific standards to operate in the National Airspace System (NAS). Among the requirements are the detect and avoid (DAA) capabilities, which include display, alerting, and guidance specifications. Previous studies have queried pilots for their subjective feedback of these display elements on earlier systems; the present study sought pilot evaluations with an initial iteration of the unmanned variant of a Next Generation Airborne Collision Avoidance System (ACAS XU). Sixteen participants piloted simulated aircraft with both standalone and integrated DAA displays. Their opinions were gathered using post-block and post-simulation questionnaires as well as guided debriefs. The data showed pilots had better understanding and comfort with the system when using an integrated display. Pilots also rated ACAS XU alerting and guidance as generally acceptable and effective. Implications for further development of ACAS XU and DAA displays are discussed.

Field and Laboratory Evaluations of Commercial and Next-Generation Alumina-Forming Austenitic Foil for Advanced Recuperators

2016 ◽  
Vol 138 (12) ◽  
Author(s):  
Bruce A. Pint ◽  
Sebastien Dryepondt ◽  
Michael P. Brady ◽  
Yukinori Yamamoto ◽  
Bo Ruan ◽  
...  
Keyword(s):  
Field Trials ◽  
Austenitic Steels ◽  
Inlet Temperature ◽  
Next Generation ◽  
Turbine Inlet Temperature ◽  
New Class ◽  
Turbine Inlet ◽  
Higher Temperature ◽  
Oxidation Testing

Alumina-forming austenitic (AFA) steels represent a new class of corrosion- and creep-resistant austenitic steels designed to enable higher temperature recuperators. Field trials are in progress for commercially rolled foil with widths over 39 cm. The first trial completed 3000 hrs in a microturbine recuperator with an elevated turbine inlet temperature and showed limited degradation. A longer microturbine trial is in progress. A third exposure in a larger turbine has passed 16,000 hrs. To reduce alloy cost and address foil fabrication issues with the initial AFA composition, several new AFA compositions are being evaluated in creep and laboratory oxidation testing at 650–800 °C and the results compared to commercially fabricated AFA foil and conventional recuperator foil performance.

scholarly journals Ferroelectric HfO2-based materials for next-generation ferroelectric memories

2016 ◽  
Vol 06 (02) ◽  
pp. 1630003 ◽  
Author(s):  
Zhen Fan ◽  
Jingsheng Chen ◽  
John Wang
Keyword(s):  
Random Access ◽  
Complementary Metal Oxide Semiconductor ◽  
Ferroelectric Materials ◽  
Oxide Semiconductor ◽  
Next Generation ◽  
New Class ◽  
Generation Cost ◽  
Potential Applications ◽  
Cost Efficient ◽  
Ferroelectric Memories

Ferroelectric random access memory (FeRAM) based on conventional ferroelectric perovskites, such as Pb(Zr,Ti)O3 and SrBi2Ta2O9, has encountered bottlenecks on memory density and cost, because those conventional perovskites suffer from various issues mainly including poor complementary metal-oxide-semiconductor (CMOS)-compatibility and limited scalability. Next-generation cost-efficient, high-density FeRAM shall therefore rely on a material revolution. Since the discovery of ferroelectricity in Si:HfO2 thin films in 2011, HfO2-based materials have aroused widespread interest in the field of FeRAM, because they are CMOS-compatible and can exhibit robust ferroelectricity even when the film thickness is scaled down to below 10 nm. A review on this new class of ferroelectric materials is therefore of great interest. In this paper, the most appealing topics about ferroelectric HfO2-based materials including origins of ferroelectricity, advantageous material properties, and current and potential applications in FeRAM, are briefly reviewed.

3D printing technology in musical instrument research: reviewing the potential

2018 ◽  
Vol 24 (9) ◽  
pp. 1511-1523 ◽  
Author(s):  
Antreas Kantaros ◽  
Olaf Diegel
Keyword(s):  
Additive Manufacturing ◽  
Design Methodology ◽  
Musical Instrument ◽  
Musical Instruments ◽  
Wind Instruments ◽  
Content Type ◽  
New Class ◽  
History Of ◽  
New Applications ◽  
Practical Implications

Purpose This paper aims to discuss additive manufacturing (AM) in the context of applications for musical instruments. It examines the main AM technologies used in musical instruments, goes through a history of musical applications of AM and raises the questions about the application of AM to create completely new wind instruments that would be impossible to produce with conventional manufacturing. Design/methodology/approach A literature research is presented which covers a historical application of AM to musical instruments and hypothesizes on some potential new applications. Findings AM has found extensive application to create conventional musical instruments with unique aesthetics designs. It’s true potential to create entirely new sounds, however, remains largely untapped. Research limitations/implications More research is needed to truly assess the potential of additive manufacturing to create entirely new sounds for musical instrument. Practical implications The application of AM in music could herald an entirely new class of musical instruments with unique sounds. Originality/value This study highlights musical instruments as an unusual application of AM. It highlights the potential of AM to create entirely new sounds, which could create a whole new class of musical instruments.

scholarly journals Research of the cyberbullying phenomenon and analysis of ways to counter its manifestations

2020 ◽  
Keyword(s):  
Individual Characteristics ◽  
Network Services ◽  
Modern World ◽  
Financial Position ◽  
Internet Harassment ◽  
Effective Technology ◽  
Further Development ◽  
Technical Measures ◽  
User Protection ◽  
Made In

The main characteristics of Internet harassment (cyberbullying) are investigated in the research. The main features of this phenomenon are considered. The analysis of existing types of cyberbullying and their individual characteristics is made. The examples of legislative acts of different countries is concluded that there is deficiency of relevant rules of low. It is emphasized that anyone can become a victim of in the modern world. At the same time a risk of becoming a victim of cyberbullying does not depend on any factors (for example financial position of victim, his or her age, sex, social position etc.). It is noted that communications that are made in cyberspace provide an opportunity for users to choose information they want to make public carefully and in advance. In most cases it contributes to help people show theirs strengths (for example, when communicating in chats). In results there is often false sympathy between network interlocutors and they trust each other. So the idealization of the partner happens and any his or her information is perceived more sensitive than during direct communication. This effect is successfully used during cyberbullying, when first one person inspires the trust of another and then changes communication tactics, becoming faithless and aggressive. It is emphasized that the cyberbullying phenomenon is very underestimated and that`s why it is a serious problem. The brief overview of existing technologies and means of counteracting this phenomenon is made. The comparison of their effectiveness is made. The standards that modern and effective technology of cyberbullying resistance must meet are systematized. There are examples of successful realization of user protection in most popular social network. It is emphasized that for cyberbullying resistance nowadays in most cases the protection technologies of it is to localize undesirable content in terms of the existence of cyberbullying. Based on the results of this research it is confirmed that the cyberbullying will spread further. This is due to the constant increase in the number of users of new network services and online platforms for communication. For effective defense against cyberbullying it is required the introduction of organizational and technical measures. At the end it is proposed the general assessment of further development of cyberbullying and the ways to improve appropriate countermeasures.

Built-in electrical field enhanced ionic transport kinetics in T−Nb2O5@MoO2 heterostructure

2021 ◽  
Author(s):  
Huihuang Huang ◽  
Guangyu Zhao ◽  
Xin Sun ◽  
Xianbo Yu ◽  
Chao Liu ◽  
...  
Keyword(s):  
Ionic Transport ◽  
Rechargeable Batteries ◽  
Transport Kinetics ◽  
High Rate ◽  
Rate Performance ◽  
Next Generation ◽  
Electrical Field ◽  
Further Development ◽  
High Rate Performance

Mg2+/Li+ hybrid ion battery (MLIB) is regarded as an engaging candidate of next generation rechargeable batteries. However, realizing superior high-rate performance is still an unremitting challenge for further development of...

Peaceful Revolutions in Algeria and Sudan: the Factor of the Coronavirus Pandemic

2021 ◽  
pp. 37-46
Author(s):  
Nailia Fakhrutdinova
Keyword(s):  
Driving Forces ◽  
Arab Countries ◽  
African Studies ◽  
Long Period ◽  
First Time ◽  
Further Development ◽  
Over Time

The article deals with the problem of the post Arabic spring situation. Only three Arab countries remained unchanged in Africa: Morocco, Algeria and Sudan. After a long period of time their protesters remained outside the zone of active action, but over time they appeared in the streets again. The circumstances forced people to take to the streets. Moroccans were in a better situation, but gradually the population of Algeria and Sudan where the situation was especially serious began to criticize the policy of the authorities, although they did it exclusively peacefully. For the first time in Russian African studies, the author assesses all the driving forces of the events at the end of 2020 and early 2021 and, emphasizing the complications brought by the coronavirus pandemic, makes an analytical forecast for the further development of the situation.

Wireless IEEE 802.11-Based Networking Approaches for Industrial Networked Systems

2013 ◽  
pp. 286-305
Author(s):  
Ricardo Moraes ◽  
Francisco Vasques
Keyword(s):  
Ieee 802.11 ◽  
Communication Systems ◽  
Networked Control Systems ◽  
Voice Over Ip ◽  
Next Generation ◽  
Medium Access ◽  
Communication Services ◽  
Access Protocol ◽  
Wide Range ◽  
New Applications

During the last few years, the demand for Real-Time (RT) communication has been steadily increasing due to a wide range of new applications. Remarkable examples are VoIP (Voice over IP) and Networked Control Systems (NCS). For such RT applications, the support of timely communication services is one of the major requirements. The purpose of this chapter is to survey the state-of-the-art on RT communication in CSMA-based networks and to identify the most suitable approaches to deal with the requirements imposed by next generation communication systems. This chapter focuses on one of the most relevant solutions that operate in shared broadcast environments, according to the CSMA medium access protocol, the IEEE 802.11 standard. From this survey, it becomes clear that traditional CSMA-based networks are not able to deal with the requirements imposed by next generation communication systems. More specifically, they are not able to handle uncontrolled traffic sources sharing the same broadcast environment.

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