scholarly journals Ανάπτυξη συστημάτων και μεθοδολογιών συλλογής γεωδαιτικών δεδομένων με τηλεχειρισμό

2021 ◽  
Author(s):  
Χαράλαμπος Μολύβας
Keyword(s):  
User Device

Στη σημερινή εποχή η εξέλιξη της επιστήμης και της τεχνολογίας δημιούργησαν τις προϋποθέσεις για την παραγωγή των χωροεικονογεωδαιτικών σταθμών (IASTS), οι οποίοι καθιστούν ικανή τη μετάδοση της εικόνας του στόχου που σκοπεύεται και τον ταυτόχρονο τηλεχειρισμό τους από κάποιον απομακρυσμένο παρατηρητή. Στην παρούσα διατριβή αναπτύσσονται και προτείνονται συστήματα και μεθοδολογίες για τον τηλεχειρισμό των χωροεικονογεωδαιτικών σταθμών (μέθοδος Remote Survey) με αναλυτική παρουσίαση των επιμέρους παραμέτρων των συστημάτων. Επίσης, παρουσιάζονται τα αποτελέσματα από την εφαρμογή των μεθοδολογιών σε ένα ικανό εύρος γεωδαιτικών εφαρμογών τόσο σε εργαστηριακό περιβάλλον, όπως ο έλεγχος μέτρησης οριζόντιων και κατακόρυφων διευθύνσεων σύμφωνα με το πρότυπο ISO 17123-3 και ο προσδιορισμός της ″Εξίσωσης αβεβαιότητας ενός συστήματος της μεθόδου Remote Survey″, όσο και σε ρεαλιστικές συνθήκες υπαίθρου, όπως ο έλεγχος μετακινήσεων ενός γεωδαιτικού δικτύου και η εκτέλεση αστρογεωδαιτικών παρατηρήσεων για τον προσδιορισμό του αστρονομικού αζιμούθιου τυχαίας διεύθυνσης. Το βασικό συμπέρασμα της διατριβής είναι ότι ο τηλεχειρισμός των χωροεικονογεωδαιτικών σταθμών είναι εφικτός, δεν αλλοιώνει την ονομαστική ακρίβεια των IASTS στη μέτρηση οριζόντιων και κατακόρυφων διευθύνσεων, μπορεί να χρησιμοποιηθεί για τον έλεγχο γεωδαιτικών δικτύων και για αστρονομικές παρατηρήσεις, βασίζεται στην υπάρχουσα μέθοδο Remote Survey [Lambrou E., 2014] και υλοποιείται με τις δύο μεθοδολογίες που ακολουθούν: 1η Μεθοδολογία Remote Survey: Ενσύρματη σύνδεση του χωροεικονογεωδαιτικού σταθμού στο διαδίκτυο μέσω της server device και τηλεχειρισμός του από την user device. Πλεονέκτημα της μεθοδολογίας η σταθερότητα που επιτυγχάνεται στην επικοινωνία μεταξύ των επιμέρους συσκευών όπως επίσης και η μεγαλύτερη ταχύτητα στη διάδοση του εκπεμπόμενου σήματος. Μειονέκτημα της μεθοδολογίας αποτελεί η δέσμευση για ενσύρματη σύνδεση η οποία και περιορίζει την ελευθερία των κινήσεων του σταθμού.2η Μεθοδολογία Remote Survey: Ασύρματη σύνδεση του χωροεικονογεωδαιτικού σταθμού στο διαδίκτυο με χρήση τεχνολογίας Wi-Fi και τηλεχειρισμός του από την user device. Πλεονέκτημα της μεθοδολογίας η ελευθερία των κινήσεων του σταθμού. Μειονέκτημα της μεθοδολογίας αποτελεί η μη σταθερότητα στη σύνδεση καθόσον διαπιστώθηκαν περιπτώσεις που είτε διακόπηκε η σύνδεση του σταθμού στο διαδίκτυο λόγω παρεμβολής άλλων δικτύων Wi-Fi είτε δεν ήταν δυνατή η σύνδεση σε επιθυμητά Wi-Fi δίκτυα.Για την υλοποίηση των ανωτέρω μεθοδολογιών αναπτύχθηκαν συστήματα που διακρίνονται σε δύο κατηγορίες ως εξής: 1ο Σύστημα της μεθόδου τηλεχειρισμού Remote Survey. Αναπτύχθηκε προκειμένου να υποστηριχθεί η μεθοδολογία της ενσύρματης σύνδεσης του χωροεικονογεωδαιτικού σταθμού στο διαδίκτυο και αποτελείται από τα ακόλουθα αδιαίρετα επιμέρους στοιχεία: • χωροεικονογεωδαιτικός σταθμός • οθόνη της server device • οθόνη της user device • παρατηρητής • στόχος και • συνθήκες 2ο Σύστημα της μεθόδου τηλεχειρισμού Remote Survey. Αναπτύχθηκε προκειμένου να υποστηριχθεί η μεθοδολογία της ασύρματης σύνδεσης του χωροεικονογεωδαιτικού σταθμού στο διαδίκτυο και αποτελείται από τα ακόλουθα αδιαίρετα επιμέρους στοιχεία: • χωροεικονογεωδαιτικός σταθμός • οθόνη της user device • παρατηρητής • στόχος και • συνθήκεςΜε την εφαρμογή των ανωτέρω συστημάτων και μεθοδολογιών εκτιμάται ότι θα βοηθηθεί στο έργο που επιτελεί τόσο η επιστημονική όσο και η επαγγελματική κοινότητα.

scholarly journals Emotion Detection of Human Face

2019 ◽  
Vol 9 (1) ◽  
pp. 5521-5524 ◽  
Keyword(s):  
Neural Network ◽  
Facial Expressions ◽  
Language Translation ◽  
Online Marketing ◽  
Facial Emotion ◽  
Good Resolution ◽  
Human Beings ◽  
Emotion Detection ◽  
Unsupervised Neural Network ◽  
User Device

Facial emotion analysis is the basic idea to train the system to understand the different facial expressions of human beings. The Facial expressions are recorded by the use of camera which is attached to user device. Additionally this project will be helpful for the online marketing of the products as it can detect the facial expressions and sentiment of the person. It is the study of people sentiment, opinions and emotions. Sentiment analysis is the method by which information is taken from the facial expressions of people in regard to different situations. The main aim is to read the facial expressions of the human beings using a good resolution camera so that the machine can identify the human sentiments. Convolutional neural network is used as an existing system which is unsupervised neural network to replace that with a supervised mechanism which is called supervised neural network. It can be used in gaming sector, unlock smart phones, automated facial language translation etc.

scholarly journals Development of mobile control system for lighting tower in golf courses

2018 ◽  
Vol 7 (2.12) ◽  
pp. 174
Author(s):  
Yong Ho Kim ◽  
Hui IL Chang
Keyword(s):  
Control System ◽  
Remote Control ◽  
Control Device ◽  
Operation Management ◽  
Control Individual ◽  
Golf Course ◽  
Golf Courses ◽  
Lighting Control ◽  
Remote Control System ◽  
User Device

Background/Objectives: It is a common for existing golf courses to manage all lighting facilities in batches because it is hard to controllighting individually. That is very much part of the golf courses and forces the whole golf course to light on even though play was finished due to the difficulty of real time checking situationMethods/Statistical analysis: Lighting control device and method in this study are provided not only to control remotely individual lighting installed each hole in golf course but to inspect failure of lighting. There is no longer to stay golf course in person to control lighting system.Findings:Lighting control device and method to be able to control individual lighting installed each hole in golf course is provided to response for the problem in a waste of electricity after playing. User device makes it possible to remotely control lighting and inspect failure of itImprovements/Applications: It can expect to reduce golf course operation management cost by building a smart tower remote control system  

Manager-employee psychological contracts: enter the smartphone

2018 ◽  
Vol 40 (2) ◽  
pp. 193-207 ◽  
Author(s):  
Elena Obushenkova ◽  
Barbara Plester ◽  
Nigel Haworth
Keyword(s):  
Psychological Contract ◽  
Psychological Contracts ◽  
Psychological Climate ◽  
Structured Interviews ◽  
Content Type ◽  
Contract Formation ◽  
Development Change ◽  
Information And Communication ◽  
Employee Relationship ◽  
User Device

Purpose The purpose of this paper is to investigate how company-provided smartphones and user-device attachment influence the psychological contract between employees and managers in terms of connectivity expectations and outcomes. Design/methodology/approach Data were collected using qualitative semi-structured interviews with 28 participants from four organizations. Findings The study showed that when organizations provide smartphones to their employees, the smartphones become a part of the manager-employee relationship through user-device attachment and this can change connectivity expectations for both employees and managers. Research limitations/implications Due to participant numbers, these findings may not be generalizable to all employees and managers who receive company smartphones. However, the authors have important implications for theory. The smartphone influence on the psychological climate and its role as a signal for workplace expectations suggest that mobile information and communication technology devices must be considered in psychological contract formation, development, change and breach. Practical implications The perceived expectations can lead to hyper-connectivity which can have a number of negative performance and health outcomes such as technostress, burnout, absenteeism and work-life conflict. Social implications Smartphone usage and user-device attachment have the potential to redefine human relations by encouraging and normalizing hyper-connected relationships. Originality/value This study makes an original contribution to psychological contract theory by showing that smartphones and attachment to these devices create perceived expectations to stay connected to work and create negative outcomes, especially for managers.

scholarly journals Analyzing and Comparing the Performance of National Biometric eID Card in Heavy Cryptographic Applications

2018 ◽  
Vol 1 (4) ◽  
pp. 37
Author(s):  
Gazmend Krasniqi ◽  
Petrit Rama ◽  
Blerim Rexha
Keyword(s):  
Secure Communication ◽  
Electronic Devices ◽  
Processing System ◽  
The Internet ◽  
End User ◽  
Processing Power ◽  
Identity Cards ◽  
Test Vectors ◽  
And Storage ◽  
User Device

Today, we are witnessing increased demand for more speed and capacity in the Internet, and more processing power and storage in every end user device. Demand for greater performance is present in every system. Electronic devices and their hosted applications need to be fast, but not to lose their main security features. Authentication and encryption are the main processes in the security aspect, and are required for a secure communication. These processes can be executed in different devices, among them PCs, microprocessors, microcontrollers, biometric cards or mobile devices. Biometric identity cards are becoming increasingly popular, challenging traditional PC devices. This paper compares two processing systems, the efficiency of encryption and signatures on the data executed in national identity biometric card versus PC, known also as the match-on-card versus the match-off-card. It considers how different parameters impact the process and the role they play on the overall process. The results, executed with a predefined set of test vectors, determine which processing system to use in a certain situation. Final conclusions and recommendations are given taking into consideration the efficiency and security of the data.

scholarly journals ZONE-Based Multi-Access Edge Computing Scheme for User Device Mobility Management

2019 ◽  
Vol 9 (11) ◽  
pp. 2308 ◽  
Author(s):  
Juyong Lee ◽  
Daeyoub Kim ◽  
Jihoon Lee
Keyword(s):  
Cloud Computing ◽  
Real Time ◽  
Mobility Management ◽  
Mobile Network ◽  
Edge Computing ◽  
Mobile Users ◽  
Long Distance ◽  
Cloud Server ◽  
Multi Access ◽  
User Device

Recently, new mobile applications and services have appeared thanks to the rapid development of mobile devices and mobile network technology. Cloud computing has played an important role over the past decades, providing powerful computing capabilities and high-capacity storage space to efficiently deliver these mobile services to mobile users. Nevertheless, existing cloud computing delegates computing to a cloud server located at a relatively long distance, resulting in significant delays due to additional time to return processing results from a cloud server. These unnecessary delays are inconvenient for mobile users because they are not suitable for applications that require a real-time service environment. To cope with these problems, a new computing concept called Multi-Access Edge Computing (MEC) has emerged. Instead of sending all requests to the central cloud to handle mobile users’ requests, the MEC brings computing power and storage resources to the edge of the mobile network. It enables the mobile user device to run the real-time applications that are sensitive to latency to meet the strict requirements. However, there is a lack of research on the efficient utilization of computing resources and mobility support when mobile users move in the MEC environment. In this paper, we propose the MEC-based mobility management scheme that arranges MEC server (MECS) as the concept of Zone so that mobile users can continue to receive content and use server resources efficiently even when they move. The results show that the proposed scheme reduce the average service delay compared to the existing MEC scheme. In addition, the proposed scheme outperforms the existing MEC scheme because mobile users can continuously receive services, even when they move frequently.

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