scholarly journals IoT OTH Maritime Surveillance Service over Satellite Network in Equatorial Environment: Analysis, Design and Deployment

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2070
Author(s):  
Ranko Petrovic ◽  
Dejan Simic ◽  
Zoran Cica ◽  
Dejan Drajic ◽  
Marko Nerandzic ◽  
...  
Keyword(s):  
Quality Of Service ◽  
Large Scale ◽  
Satellite Communication ◽  
Sensor Data ◽  
Gulf Of Guinea ◽  
Fusion Algorithm ◽  
Surveillance Network ◽  
Maritime Surveillance ◽  
The Impact

This paper explores the challenges and constraints when over the horizon (OTH) maritime surveillance service utilizes an Internet of Things (IoT) as its backbone. The service is based on High Frequency Surface Wave Radars (HFSWRs) and relies on a satellite communication network as its communication infrastructure in harsh environments. The complete IoT OTH maritime surveillance network is currently deployed in the Gulf of Guinea, which due to its tropical climate represents an unfavorable environment for sensors and communications. In this paper, we have examined the service performance under various meteorological conditions specific to the Gulf of Guinea. To the best of our knowledge, this is the first analysis of IoT OTH maritime surveillance service in equatorial environment. Our analysis aims to mathematically describe the impact of harsh weather conditions on the performance of the service in order to mitigate it with careful overall system design and provide constant quality of the service. Analyses presented in the paper show that average service latency is about 90 s, but it can rise to about 120 s, which is used as a key information during the sensor data fusion algorithm design. Validity of the analyses is demonstrated through high quality of service with an outage probability of just 0.1% in the driest months up to the 0.7% in the rainiest months. The work presented here can be used as a guideline for deployment of maritime surveillance service solutions in other equatorial regions. Moreover, the gained experience presented in this paper will significantly facilitate future expansions of the existing maritime surveillance network with more HFSWRs. This will be done in such a way that it will not affect the quality of service of the entire system on a large scale.

QoS Oriented Enhancement based on the Analysis of Dynamic Job Scheduling in HPC

2014 ◽  
Vol 6 (4) ◽  
pp. 28-45 ◽  
Author(s):  
Reshmi Raveendran ◽  
D. Shanthi Saravanan
Keyword(s):  
Resource Allocation ◽  
Quality Of Service ◽  
High Performance ◽  
Large Scale ◽  
Job Scheduling ◽  
Dynamic Scheduling ◽  
Future Research ◽  
Dynamic Allocation ◽  
The Impact

With the advent of High Performance Computing (HPC) in the large-scale parallel computational environment, better job scheduling and resource allocation techniques are required to deliver Quality of Service (QoS). Therefore, job scheduling on a large-scale parallel system has been studied to minimize the queue time, response time, and to maximize the overall system utilization. The objective of this paper is to touch upon the recent methods used for dynamic resource allocation across multiple computing nodes and the impact of scheduling algorithms. In addition, a quantitative approach which explains a trend line analysis on dynamic allocation for batch processors is depicted. Throughout the survey, the trends in research on dynamic allocation and parallel computing is identified, besides, highlights the potential areas for future research and development. This study proposes the design for an efficient dynamic scheduling algorithm based on the Quality-of-Service. The analysis provides a compelling research platform to optimize dynamic scheduling of jobs in HPC.

scholarly journals Performance metrics in wireless sensor networks :a survey and outlook

2018 ◽  
Vol 7 (2.26) ◽  
pp. 25
Author(s):  
E Ramya ◽  
R Gobinath
Keyword(s):  
Wireless Sensor Networks ◽  
Quality Of Service ◽  
Wireless Sensor Network ◽  
Sensor Networks ◽  
Sensor Network ◽  
Performance Metrics ◽  
Resource Constraints ◽  
Sensor Data ◽  
Wireless Sensor

Data mining plays an important role in analysis of data in modern sensor networks. A sensor network is greatly constrained by the various challenges facing a modern Wireless Sensor Network. This survey paper focuses on basic idea about the algorithms and measurements taken by the Researchers in the area of Wireless Sensor Network with Health Care. This survey also catego-ries various constraints in Wireless Body Area Sensor Networks data and finds the best suitable techniques for analysing the Sensor Data. Due to resource constraints and dynamic topology, the quality of service is facing a challenging issue in Wireless Sensor Networks. In this paper, we review the quality of service parameters with respect to protocols, algorithms and Simulations. 

scholarly journals HOSPITALITY MANAGEMENT AS A PREREQUISITE OF EFFECTIVE TOURISM DEVELOPMENT IN UKRAINE

2021 ◽  
Author(s):  
Olena Khytra
Keyword(s):  
Quality Of Service ◽  
Corporate Culture ◽  
Management System ◽  
Hospitality Industry ◽  
Professional Competence ◽  
Tourism Industry ◽  
Hospitality Management ◽  
Social Orientation ◽  
The Impact

The hospitality industry acquires the features of an integrative industry, which combines material resources and intangible factors to meet the needs of modern man for comfortable travel and recreation. Hospitality is interpreted as a complex economic, social, cultural, psychological phenomenon, the impact of which on the development of the tourism industry determines the effect of synergy from the combination of tourist resources and quality of service. The author of article proposes to consider hospitality management as a multilevel dynamic management system for the process of providing services to tourists and vacationers, based primarily on the principles of humanism, tolerance, personalization of hospitality, respect for cultural diversity, priority to meet human needs for quality recreation and physical strength as well as cultural self-development. The social orientation of this system to some extent balances the commercial, purely pragmatic aspect of managing the development of tourism enterprises. A holistic model of hospitality management is based on a harmonious combination of four concepts. They are humanitarian, technological, functional and commercial. The system-forming component of the hospitality sector is a mechanism for managing consumer behaviour, which ensures an optimal balance of supply and demand in the market of hospitality services. The specifics of service in the hospitality industry is that the quality of service affects the emotional perception of tourists in the area and, accordingly, affects the image of the state. Therefore, the mechanism for implementing the service policy should be established through public administration measures. Among the key areas of hospitality management development is the formation of a rational organizational structure, improvement of hospitality marketing and support of corporate culture, the values of which are adequate to the socio-cultural environment of the hospitality industry. The specificity of the hospitality industry is also that an important role in ensuring competitiveness is played by an attractive brand, which stipulates the allocation in the management system of such a component as brand management. Considerable attention should be paid to the innovative development of hospitality enterprises and the constant improvement of professional competence of managers of socio-cultural activities.

scholarly journals Optimal approach for building scheduling algorithm in satellite communication

2018 ◽  
Vol 7 (2.28) ◽  
pp. 181
Author(s):  
Ali M. Al-Saegh
Keyword(s):  
Quality Of Service ◽  
Communication Networks ◽  
Satellite Communication ◽  
Scheduling Algorithm ◽  
Satellite Communications ◽  
Satellite Networks ◽  
Communication Links ◽  
Optimal Approach ◽  
Proper Solutions

Building scheduling algorithms in satellite communication links became a necessity according to the typical problems that satellite networks suffers from, such as congestions, jamming, mobility, atmospheric impairment, and achieving the quality of service (QoS) requirements. However, building efficient algorithms needs several considerations that should be taken into account. Such as satellite and earth station node(s), link parameters and specifications, along with the service requirements and limitations. This paper presents efficient approach for accumulating the effective considerations that the designer should employ as a framework for building proper and efficient scheduling algorithm. The proposed approach provides proper solutions to the satellite communications impairments and satisfies the quality of service requirements in satellite communication networks.  

scholarly journals Introducing a Mobility Access Category for IEEE 802.11e

2020 ◽  
Vol 9 (5) ◽  
pp. 1610-1614
Keyword(s):  
Quality Of Service ◽  
Wireless Network ◽  
Ieee 802.11E ◽  
Network Simulator ◽  
Mobile Nodes ◽  
Mobile Stations ◽  
Simulation Scenario ◽  
Simulation Results ◽  
The Impact

With traffic increase in a wireless network beyond its capacity and as the number of connected devices continue to grow, the quality of service (QoS) degrades. In this paper we study the impact of mobility on throughput in the case of an infrastructure wireless network using IEEE 802.11 Wi-Fi standard. Since we found in the literature that the mobility of stations can have an impact on the quality of service, we try to remedy to this by implementing a new access category reserved for mobile stations. First we compare the throughput between static and mobile nodes, both connected to a QoS station. Then we propose our new model that consists of adding a new access category used by mobile nodes regardless of their traffic category. The study was made by simulating different scenarios using Network Simulator-3 (NS-3). We found that the throughput may vary depending on the simulation scenario. The simulation results show that with the proposed solution the mobile nodes can have a better throughput.

scholarly journals Automatic delineation of debris-covered glaciers using InSAR coherence derived from X-, C- and L-band radar data: a case study of Yazgyl Glacier

2018 ◽  
Vol 64 (247) ◽  
pp. 811-821 ◽  
Author(s):  
STEFAN LIPPL ◽  
SAURABH VIJAY ◽  
MATTHIAS BRAUN
Keyword(s):  
Large Scale ◽  
Window Size ◽  
Radar Data ◽  
Morphological Operations ◽  
L Band ◽  
Surrounding Areas ◽  
Coherence Estimation ◽  
The Impact

ABSTRACTDespite their importance for mass-balance estimates and the progress in techniques based on optical and thermal satellite imagery, the mapping of debris-covered glacier boundaries remains a challenging task. Manual corrections hamper regular updates. In this study, we present an automatic approach to delineate glacier outlines using interferometrically derived synthetic aperture radar (InSAR) coherence, slope and morphological operations. InSAR coherence detects the temporally decorrelated surface (e.g. glacial extent) irrespective of its surface type and separates it from the highly coherent surrounding areas. We tested the impact of different processing settings, for example resolution, coherence window size and topographic phase removal, on the quality of the generated outlines. We found minor influence of the topographic phase, but a combination of strong multi-looking during interferogram generation and additional averaging during coherence estimation strongly deteriorated the coherence at the glacier edges. We analysed the performance of X-, C- and L- band radar data. The C-band Sentinel-1 data outlined the glacier boundary with the least misclassifications and a type II error of 0.47% compared with Global Land Ice Measurements from Space inventory data. Our study shows the potential of the Sentinel-1 mission together with our automatic processing chain to provide regular updates for land-terminating glaciers on a large scale.

ANALISA DAMPAK KEPUASAN PELANGGAN DALAM HUBUNGAN ANTARA ORIENTASI PELAYANAN DAN KUALITAS PELAYANAN TERHADAP LOYALITAS PELANGGAN SALON MUSLIMAH

2021 ◽  
Vol 8 (3) ◽  
pp. 297
Author(s):  
Ibnu Jauzi ◽  
Ari Prasetyo
Keyword(s):  
Quality Of Service ◽  
Customer Satisfaction ◽  
Service Quality ◽  
Customer Loyalty ◽  
Service Orientation ◽  
Service Companies ◽  
The Impact ◽  
The Relationship ◽  
Pls Method

ABSTRAKLoyalitas pelanggan merupakan hal yang harus diutamakan perusahaan jasa dalam menjalankan bisnisnya. Tanpa adanya pelanggan yang loyal terhadap perusahaan maka sustainbility perusahaan tersebut akan terancam. Penelitian ini bertujuan untuk meneliti dampak orientasi pelayanan dan kualitas pelayanan terhadap loyalitas pelanggan melalui kepuasan pelanggan pada salon muslimah di Kota Kediri. Apakah dalam mencapai loyalitas pelanggan harus melalui kepuasan pelanggan atau tidak. Penelitian ini menggunakan pendekatan kuantitatif dengan metode SEM PLS. Pengujiannya dilakukan menggunakan aplikasi SmartPLS 3.0 dengan kategori responden yaitu pelanggan yang telah merasakan produk salon muslimah di Kota Kediri. Hasil penelitian menunjukkan adanya efek moderasi kepuasan pelanggan dalam hubungan orientasi dan kualitas pelayanan terhadap loyalitas pelanggan.Hal tersebut mengindikasikan bahwa orientasi dan kualitas pelayanan yang dilakukan oleh salon muslimah di Kota Kediri bisa dikategorikan baik sehingga membuat para pelanggannya menjadi loyal.Kata Kunci: Loyalitas Pelanggan, Orientasi Pelayanan, Kualitas Pelayanan, Kepuasan Pelanggan, Salon Muslimah. ABSTRACTCustomer loyalty is something that must be prioritized by service companies in running their business. Without customers who are loyal to the company, the company's sustainability will be threatened. This study aims to examine the impact of service orientation and service quality on customer loyalty through customer satisfaction at Muslimah salons in Kediri. Whether to achieve customer loyalty must go through customer satisfaction or not. This study uses a quantitative approach with the SEM PLS method. The test was carried out using the SmartPLS 3.0 application with the respondent category, namely customers who have experienced Muslim salon products in Kediri. The results showed that there was a moderating effect of customer satisfaction in the relationship between orientation and service quality on customer loyalty. This indicates that the orientation and quality of service carried out by muslimah salons in Kediri City can be categorized as good so that it makes its customers loyal.Keywords: Customer Loyalty, Service Orientation, Service Quality, Customer Satisfaction, Muslimah Salon.

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