scholarly journals Concepts on Train-to-Ground Wireless Communication System for Hyperloop: Channel, Network Architecture, and Resource Management

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4309
Author(s):  
Jiachi Zhang ◽  
Liu Liu ◽  
Botao Han ◽  
Zheng Li ◽  
Tao Zhou ◽  
...  
Keyword(s):  
Resource Management ◽  
Communication System ◽  
Network Architecture ◽  
Management Strategies ◽  
Access Network ◽  
Antenna System ◽  
Wireless Channel ◽  
Channel Network ◽  
Communication Services ◽  
Physical Resource Block

Hyperloop is envisioned as a novel transportation way with merits of ultra-high velocity and great traveling comforts. In this paper, we present some concepts on the key technologies dedicated to the train-to-ground communication system based on some prevailing fifth-generation communication (5G) technologies from three aspects: wireless channel, network architecture, and resource management. First, we characterize the wireless channel of the distributed antenna system (DAS) using the propagation-graph channel modelling theory. Simulation reveals that a drastic Doppler shift variation appears when crossing the trackside antenna. Hence, the leaky waveguide system is a promising way to provide a stable receiving signal. In this regard, the radio coverage is briefly estimated. Second, a cloud architecture is utilized to integrate several successive trackside leaky waveguides into a logical cell to reduce the handover frequency. Moreover, based on a many-to-many mapping relationship between distributed units (DUs) and centralized units (CUs), a novel access network architecture is proposed to reduce the inevitable handover cost by using the graph theory. Simulation results show that this scheme can yield a low handover cost. Then, with regards to the ultra-reliable and low latency communication (uRLLC) traffic, a physical resource block (PRB) multiplexing scheme considering the latency requirements of each traffic type is exploited. Simulation presents that this scheme can maximize the throughput of non-critical mission communication services while guaranteeing the requirements of uRLLC traffic. Finally, in terms of the non-critical mission communication services, two cache-based resource management strategies are proposed to boost the throughput and reduce the midhaul link burden by pre-fetching and post-uploading schemes. Simulation demonstrates that the cache-based schemes can boost the throughput dramatically.

Plan of Power Communication Network Based on Smart Grid Services

2014 ◽  
Vol 631-632 ◽  
pp. 869-873
Author(s):  
Wei Lin Fan ◽  
Ping Ma ◽  
Qiang Gao
Keyword(s):  
Communication Network ◽  
Smart Grid ◽  
Power Distribution ◽  
Network Architecture ◽  
Access Network ◽  
Network Survivability ◽  
Local Network ◽  
Grid Services ◽  
Bandwidth Utilization ◽  
Communication Services

Based on available data and predictions of power distribution and utilization communication services in smart grid of a realistic province, a plan for power communication network is proposed. For access network, communication strategies are explored based on load density of different power supply areas. As for transport network, architecture of trunk and local network is designed and its feasibility is discussed in terms of bandwidth utilization and network survivability.

Validating the Resource-Management Inventory (ReMI)

2020 ◽  
Vol 36 (5) ◽  
pp. 777-786 ◽  
Author(s):  
Julia Waldeyer ◽  
Jens Fleischer ◽  
Joachim Wirth ◽  
Detlev Leutner
Keyword(s):  
Higher Education ◽  
Academic Achievement ◽  
Resource Management ◽  
Measurement Invariance ◽  
Factor Structure ◽  
Management Strategies ◽  
Group Analysis ◽  
Management Skills ◽  
First Year Students ◽  
Management Competency

Abstract. There is substantial evidence that students in higher education who have sophisticated resource-management skills are more successful in their studies. Nevertheless, research shows that students are often not adequately prepared to use resource-management strategies effectively. It is thus crucial to screen and identify students who are at risk of poor resource management (and consequently, reduced academic achievement) to provide them with appropriate support. For this purpose, we extend the validation of a situational-judgment-based instrument called Resource-Management Inventory (ReMI), which assesses resource-management competency (including knowledge of resource-management strategies and the self-reported ability to use this knowledge in learning situations). We evaluated the ReMI regarding factor structure, measurement invariance, and its impact on academic achievement in different study domains in a sample of German first-year students ( N = 380). The results confirm the five-factor structure that has been found in a previous study and indicate strong measurement invariance. Furthermore, taking cognitive covariates into account, the results confirm that the ReMI can predict students’ grades incrementally. Finally, a multi-group analysis shows that the findings can be generalized across different study domains. Overall, we provide evidence for a valid and efficient instrument for the assessment of resource-management competency in higher education.

Moderating Role of Learning Strategies Between Meta-Cognitive Awareness and Study Habits Among University Students

2019 ◽  
Vol 34 (Spring 2019) ◽  
pp. 215-231
Author(s):  
Mussarat J. Khan ◽  
Seemab Rasheed
Keyword(s):  
Regression Analysis ◽  
Resource Management ◽  
University Students ◽  
Learning Strategies ◽  
Management Strategies ◽  
Cognitive Strategies ◽  
Study Habits ◽  
Good Reliability ◽  
Cognitive Awareness

The purpose of present study is to examine the role of learning strategies as moderator between meta-cognitive awareness and study habits among university students. Sample comprises of 200 students (100 male students and 100 female students) of various universities of Islamabad and Rawalpindi with age ranging from 18-25 years. In order to assess study variables questionnaires were used included Meta-Cognitive Awareness Inventory (Schraw & Dennison, 1994) measuring two-components of meta-cognition that are knowledge and regulation of cognition. Study habits demonstrated by the students were measured by the Study Habits Inventory (Wrenn, 1941). Motivated Strategies for Learning Questionnaire (Pintrich, Smith, Garcia, & McKeachie, 1991) which includes motivation and learning strategies scales. In the present study, only the learning strategies section was utilized, which measures the cognitive strategies and resource management strategies. Results revealed positive correlation between research instruments and are also having good reliability. Regression analysis reflected that meta-cognitive awareness predicts study habits among university students. Regression analysis also suggested that learning strategies including resource management strategies and cognitive strategies significantly moderates the relationship between meta-cognitive awareness and study habits. It is also explored gender differences on learning strategies, meta-cognitive awareness and study habits. Future implications of the study were also discussed.

Combination of human resource management methods during in times of change

2020 ◽  
pp. 144-150
Author(s):  
V.A. Morozov
Keyword(s):  
Human Capital ◽  
Resource Management ◽  
Human Resource Management ◽  
Crisis Management ◽  
Human Resource ◽  
Management Strategies ◽  
Strategic Human Resource Management ◽  
Crisis Period

This article focuses on the aspects of human resource management strategies in crisis management, as well as the comparison of classical and modern ways to overcome the consequences of crises for human capital. The possible consequences of ongoing and possible crises, as well as ways to prevent and overcome them, are investigated. Personnel strategies in human resource management are disclosed. The presentation of strategic human resource management in a crisis period is given.

scholarly journals Sensitive Men and Hardy Women: How Do Millennials, Xennials and Gen X Manage to Work from Home?

2021 ◽  
Vol 7 (2) ◽  
pp. 106
Author(s):  
Agota Giedrė Raišienė ◽  
Violeta Rapuano ◽  
Kristina Varkulevičiūtė
Keyword(s):  
Resource Management ◽  
Human Resource Management ◽  
Human Resource ◽  
Older Workers ◽  
Open Innovation ◽  
New Technologies ◽  
Practical Implication ◽  
Management Strategies ◽  
Employee Motivation ◽  
Work From Home

Despite the huge number of studies on telework in 2020, the influence of socio-demographic characteristics of workers on their attitudes towards telework continues to raise questions. Researchers agree on some aspects, such as younger individuals being better at absorbing new technologies. However, given that not only those who wanted to but also those who were obliged to switched to teleworking, it appears that younger people may not be as effective at working remotely as previously thought. The relevance of our study is based on the contradictory findings of research conducted during the pandemic. With this article, we contribute to the accumulation of knowledge about the change that takes place in telework. The paper aims to examine the relationship between socio-demographic indicators and the evaluation of telework. Our study confirms that the gender and age of employees are important factors in an employee’s attitude to telecommuting. Mostly, the attitudes vary in terms of gender. At least in the case of Lithuania where the research was conducted, Millennial men, unlike other generations and significantly more than Millennial women, see personal career development problems working remotely. Meanwhile, older generations do not declare greater dissatisfaction working remotely, although they do not express much favour for this approach. The results of the study indicate that in the circumstances created by the pandemic, organizations should update their human resource management strategies to achieve employee work efficiency and maintain employee motivation. The practical implication of our study in terms of open innovation is that in the future, the development of virtual working relationships will need to focus not on the technological training of older workers but on the specific provision of feedback to younger workers. In this regard, our insights may be useful for leaders in human resource management and open innovation teams.

Introduction to Wireless Endogenous Security and Safety: Problems, Attributes, Structures and Functions

2021 ◽  
Author(s):  
Xiaoyan Hu ◽  
Liang Jin ◽  
Yangming Lou ◽  
Zhou Zhong ◽  
Xiaoli Sun
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Communication Systems ◽  
Wireless Channel ◽  
Communication Security ◽  
Wireless Communication Systems ◽  
Functional Safety ◽  
Wireless Communication System ◽  
Safety Technology ◽  
Safety Attributes

Abstract: The information security and functional safety of wireless communication systems have become the focus of current research. The endogenous security principle based on Dynamic Heterogeneous Redundancy provides a direction for the development of wireless communication security and safety technology. This paper introduces the concept of wireless endogenous security from the following four aspects. First, we sorts out the endogenous security problems faced by the current wireless communication system, and then analyzes the endogenous security and safety attributes of the wireless channel. After that, the endogenous security and safety structure of the wireless communication system is given, and finally the applications of the existing wireless communication endogenous security and safety functions are listed. <br>

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