This document summarizes a project to map rescue service providers and routes within the Kathmandu ring road. The project was conducted by engineering students and aimed to prepare a map showing locations of hospitals, police stations, fire brigades, traffic areas, and petrol pumps to assist rescue operations. Key features of the map included identifying high accident areas and presenting contact information for rescue services. The project was completed on schedule and achieved its objectives of creating an informative map to enhance emergency response, as existing maps lacked comprehensive rescue information.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness and well-being.
Este documento resume la información sobre el sangrado de tubo digestivo alto (STDA), incluyendo sus causas, signos y síntomas, evaluación, tratamiento y pronóstico. Define el STDA como la pérdida de sangre proveniente de cualquier parte del tubo digestivo por arriba del ángulo de Treitz, ya sea fresca o digerida. Describe las causas variceales y no variceales, y los tratamientos incluyen endoscopia, medicamentos como inhibidores de la bomba de protones, y en casos graves, procedimientos como TIPS u ob
This document summarizes a project to map rescue service providers and routes within the Kathmandu ring road. The project was conducted by engineering students and aimed to prepare a map showing locations of hospitals, police stations, fire brigades, traffic areas, and petrol pumps to assist rescue operations. Key features of the map included identifying high accident areas and presenting contact information for rescue services. The project was completed on schedule and achieved its objectives of creating an informative map to enhance emergency response, as existing maps lacked comprehensive rescue information.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness and well-being.
Este documento resume la información sobre el sangrado de tubo digestivo alto (STDA), incluyendo sus causas, signos y síntomas, evaluación, tratamiento y pronóstico. Define el STDA como la pérdida de sangre proveniente de cualquier parte del tubo digestivo por arriba del ángulo de Treitz, ya sea fresca o digerida. Describe las causas variceales y no variceales, y los tratamientos incluyen endoscopia, medicamentos como inhibidores de la bomba de protones, y en casos graves, procedimientos como TIPS u ob
Adaptive multisourcing video streaming in android phonesTripsta
The high demand for video streaming in mobile phones and the increase of
the amount of data transmitted in the Internet creates congestion that results in poor
video quality. This thesis develops and experiments with a video streaming
application that can transfer video data from multiple servers (multi-source), thus
taking advantage of bandwidth available in multiple paths and the capabilities of
multiple servers. The application amount of data requested from different servers
based on their throughput and includes fault control to tackle the case when a server CV of Christos Boursinos
2
stops being available. In addition to video streaming, the application can be used for
general file transfer. The video streaming application was developed for Android
Smartphones. Experiments show the performance of the application for different
scenarios, which include server faults and very low throughput and cases where
servers have different throughputs.
This document provides information about AIESEC's ICX team in Suez, Egypt. It includes the structure of the ICX team, biographies of team members, and descriptions of their roles and responsibilities. Achievements of the ICX team are summarized, including a total of 9 school and NGO visits that resulted in 2 partnership deals. Targets for the future are outlined, such as plans to host 57 visits, 88 trainees, and 50 realized interns from October to February. Potential bottlenecks and advice for the team are also discussed.
This short document does not contain any meaningful information to summarize. It consists of formatting characters without any words or sentences of substance. In 3 sentences or less, there is no essential information that can be extracted from the given text to create a useful summary.
Generation of High Resolution DSM Using UAV Images.Niroj Panta
The research explains how to convert the images acquired through the UAV to a product like DSM using different algorithm ranging from the classical photogrammetry to modern computer vision.
a seminar report on multi-mode 2/4 stroke internal combustion enginehardik9343
The document summarizes a seminar presented by Mohammed Husain Esmail Masalawala on multi-mode 2/4-stroke internal combustion engines. The seminar addressed increasing demand for internal combustion engines, scarcity of fuel, and pollution issues. It explored areas of interest like power, efficiency, and emissions. It discussed engine types including suction ignition, compressed ignition, homogeneous compressed charged, hybrid, and boosted engines. The seminar proposed a concept of a multi-mode engine and discussed technological requirements, results, implementation areas, and concluded with highlighting the need for more efficient engines.
Athens Mini Maker Faire 2016-GRIoT -LoraWan implementationVagelis Fragkos
Presenting a LoraWan implementation of The Things Network, Athens community. Specifically we present the ETS kit,(Easy Temperature Sensor)
The Easy Temperature Sensor kit, measures temperature and humidity data using Lora protocol for transferring them with MQTT and stores them in a mongo database.The data is shown on a demo in www.griot.gr with visualization and the ability to export data.
The presentation was on 1st Athens Mini Maker Faire in 1-2 October 2016.
Athens Mini Maker Faire 2016-GRIoT -LoraWan implementationEvangelos Fragkos
Presenting a LoraWan implementation of The Things Network, Athens community. Specifically we present the ETS kit,(Easy Temperature Sensor)
The Easy Temperature Sensor kit, measures temperature and humidity data using Lora protocol for transferring them with MQTT and stores them in a mongo database.The data is shown on a demo in www.griot.gr with visualization and the ability to export data.
The presentation was on 1st Athens Mini Maker Faire in 1-2 October 2016.
Το 7ο κεφάλαιο στο μάθημα Τεχνολογία Δικτύων Επικοινωνιών του τομέα Ηλεκτρονικής και ειδικότητας Ηλεκτρονικών Υπολογιστικών Συστημάτων και Δικτύων, Γ’ τάξη ΕΠΑΛ.
Η παρουσίαση αυτή (PTT in PDF) είναι ενεργή, συνοδεύεται από κάποια αρχεία τα οποία συνδέονται με υπερσυνδέσεις. Περισσότερες πληροφορίες στην σελίδα http://www.ilektronikoi.gr/index.php?act=viewCat&catId=19
Adaptive multisourcing video streaming in android phonesTripsta
The high demand for video streaming in mobile phones and the increase of
the amount of data transmitted in the Internet creates congestion that results in poor
video quality. This thesis develops and experiments with a video streaming
application that can transfer video data from multiple servers (multi-source), thus
taking advantage of bandwidth available in multiple paths and the capabilities of
multiple servers. The application amount of data requested from different servers
based on their throughput and includes fault control to tackle the case when a server CV of Christos Boursinos
2
stops being available. In addition to video streaming, the application can be used for
general file transfer. The video streaming application was developed for Android
Smartphones. Experiments show the performance of the application for different
scenarios, which include server faults and very low throughput and cases where
servers have different throughputs.
This document provides information about AIESEC's ICX team in Suez, Egypt. It includes the structure of the ICX team, biographies of team members, and descriptions of their roles and responsibilities. Achievements of the ICX team are summarized, including a total of 9 school and NGO visits that resulted in 2 partnership deals. Targets for the future are outlined, such as plans to host 57 visits, 88 trainees, and 50 realized interns from October to February. Potential bottlenecks and advice for the team are also discussed.
This short document does not contain any meaningful information to summarize. It consists of formatting characters without any words or sentences of substance. In 3 sentences or less, there is no essential information that can be extracted from the given text to create a useful summary.
Generation of High Resolution DSM Using UAV Images.Niroj Panta
The research explains how to convert the images acquired through the UAV to a product like DSM using different algorithm ranging from the classical photogrammetry to modern computer vision.
a seminar report on multi-mode 2/4 stroke internal combustion enginehardik9343
The document summarizes a seminar presented by Mohammed Husain Esmail Masalawala on multi-mode 2/4-stroke internal combustion engines. The seminar addressed increasing demand for internal combustion engines, scarcity of fuel, and pollution issues. It explored areas of interest like power, efficiency, and emissions. It discussed engine types including suction ignition, compressed ignition, homogeneous compressed charged, hybrid, and boosted engines. The seminar proposed a concept of a multi-mode engine and discussed technological requirements, results, implementation areas, and concluded with highlighting the need for more efficient engines.
Athens Mini Maker Faire 2016-GRIoT -LoraWan implementationVagelis Fragkos
Presenting a LoraWan implementation of The Things Network, Athens community. Specifically we present the ETS kit,(Easy Temperature Sensor)
The Easy Temperature Sensor kit, measures temperature and humidity data using Lora protocol for transferring them with MQTT and stores them in a mongo database.The data is shown on a demo in www.griot.gr with visualization and the ability to export data.
The presentation was on 1st Athens Mini Maker Faire in 1-2 October 2016.
Athens Mini Maker Faire 2016-GRIoT -LoraWan implementationEvangelos Fragkos
Presenting a LoraWan implementation of The Things Network, Athens community. Specifically we present the ETS kit,(Easy Temperature Sensor)
The Easy Temperature Sensor kit, measures temperature and humidity data using Lora protocol for transferring them with MQTT and stores them in a mongo database.The data is shown on a demo in www.griot.gr with visualization and the ability to export data.
The presentation was on 1st Athens Mini Maker Faire in 1-2 October 2016.
Το 7ο κεφάλαιο στο μάθημα Τεχνολογία Δικτύων Επικοινωνιών του τομέα Ηλεκτρονικής και ειδικότητας Ηλεκτρονικών Υπολογιστικών Συστημάτων και Δικτύων, Γ’ τάξη ΕΠΑΛ.
Η παρουσίαση αυτή (PTT in PDF) είναι ενεργή, συνοδεύεται από κάποια αρχεία τα οποία συνδέονται με υπερσυνδέσεις. Περισσότερες πληροφορίες στην σελίδα http://www.ilektronikoi.gr/index.php?act=viewCat&catId=19
Ex machina IoT λύσεις για τη σύγχρονη αγροτική παραγωγήVassilis Chryssos
Παρουσίαση από την ημερίδα με θέμα «Αγροτική ανάπτυξη και επένδυση στους νέους αγρότες» που διοργάνωσε το Τμήμα Οικονομικών Επιστημών της Σχολής Οικονομίας, Διοίκησης και Πληροφορικής Πανεπιστήμιο Πελοποννήσου.
Το 6ο κεφάλαιο στο μάθημα Τεχνολογία Δικτύων Επικοινωνιών του τομέα Ηλεκτρονικής και ειδικότητας Ηλεκτρονικών Υπολογιστικών Συστημάτων και Δικτύων, Γ’ τάξη ΕΠΑΛ.
Η παρουσίαση αυτή (PTT in PDF) είναι ενεργή, συνοδεύεται από κάποια αρχεία τα οποία συνδέονται με υπερσυνδέσεις. Περισσότερες πληροφορίες στην σελίδα http://www.ilektronikoi.gr/index.php?act=viewCat&catId=19
1. Philipp M. Eittenberger, Matthias Herbst, Udo R. Krieger
Faculty of Information Systems and Applied Computer Science
Otto-Friedrich University
Bamberg, Germany
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
1
2.
Αύξηση του video traffic κατά 90% κάθε
χρόνο.
Video Streaming μέσο προγραμμάτων(SopCast, PPLive)
Οι εφαρμογές P2P Streaming
◦ Έξυπνο διαμοιρασμό του video σε Wi-Fi ή mobile
δίκτυα με χαμηλό κόστος και μεγαλύτερη
επεκτασιμότητα
Όμως
◦ Network resources aggressively
◦ Και υπάρχει πρόβλημα στο διαμοιρασμό με τους
άλλους κόμβους
Γιατί τα P2P έχουν γίνει για “wired” δίκτυα
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
2
3.
Το πώς θα γίνει μεταφορά της τεχνολογίας
P2P σε mobile devices και networks.
◦ Πολύ χρήστες για streaming
◦ LTE τεχνολογία
◦ Καλύτερες συσκευές mobile
Στο άρθρο αυτό παρουσιάζεται μια εφαρμογή
P2P video streaming σε mobile devices:
RapidStream.
Hybrid P2P system
◦ Video Server,Tracker Server, Rendezvous Server, Android
devices (P2P)
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
3
4.
Venot and Yan
◦ JXTA based P2P video streamer
not able to stream video progressively( all downloaded)
Zhang et al
◦ Symbian based P2P video streamer
Energy consumption on the mobile devices
Diaz et al
◦ Measurement study on Symbian based P2P video streamer
Limited resources the mobile phones 2007
Peltotalo et al
◦ RTSP για P2P streaming
Leung and Chan
◦ Πρωτόκολλο για P2P διάχυση του περιεχομένου
πολυμέσων
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
4
5.
Είναι η πρώτη εργασία με P2P σε mobile
network live streaming σε android
Δίνει πληροφορίες για προβλήματα ή μη
που υπάρχουν στο android με live streaming
◦ Mpeg4 ή 3GPP παίζει μόνο
◦ RTSP/RTP implementation (audio player)
◦ Moov atom file για να πηγαίνει πρώτο σε
download
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
5
6.
Προβλήματα με mobile devices
◦ Battery powered
◦ Χαμηλή διαχειριστική ισχύ σε σχέση με PCs
◦ 48mb java application
Πως πρέπει να είναι το πρωτόκολλο
◦ Ελαφρύ Πρωτόκολλο για χαμηλό overhead
communication
◦ Χαμηλή διαχείριση πόρων δικτύου για να είναι
όσο το δυνατό energy και resource efficient
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
6
7. Video content
2,4, 6
ID,Channels
1
Swarm peers
Channels broad casted
Connect peer with NAT or not
8
6
Peer list
3
5,7
Buffer maps
Buffer maps, moov atom
Hybrid P2P system για να μπορούμε να μην έχουμε μεγάλο
φόρτο στους κόμβους.
Chunk size 2mb , όχι keep alive.
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
7
9. 1. Performance is the main test
2. Start-up delay: time between
initial request of the video data
and time the video playback
starts
3. Video without disruptions
download throughput 105,94
kb/sec respectively 847,5
Kb/sec
4. 4 hours for battery
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
9
10. ΘΕΤΙΚΑ
ΑΡΝΗΤΙΚΑ
1. Πρώτη video streaming
εφαρμογή για mobile networks
2. Λύνει το πρόβλημα που
δημιουργείται με το ΝΑΤ με το
rendezvous server
3. Μειώνει την κίνηση του
δικτύου γιατί δεν έχει τη
λειτουργία keep alive
4. Chunk size μεγάλο για
λιγότερη κίνηση
5. Δίνει λύση στο πώς να παίζει
το video απ την αρχή στην
εφαρμογή μέσο moov atom.
1. Λίγα κινητά για το test
2. Τα κινητά ήταν Samsung που
δημιουργούν προβλήματα με
το video streaming
3. Λίγα πειράματα
4. Μικρό video οπότε δεν έχουμε
το δίκτυο για πολύ ώρα
γεμάτο να δούμε τα
αποτελέσματα
5. Μπορεί να τραβήξει μόνο από
5 peers χωρίς να μας δίνουν
ένα διάγραμμα
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
10
11. 1.
Να μην υπήρχε ο tracker server γιατί δημιουργεί
πρόσθετη κίνηση στο δίκτυο.
1.
Να γίνονταν όλα στον video server
1.
2.
3.
4.
Μείωση και του delay Start-up.
Παραπάνω servers για να βλέπαμε τις διαφορές
Επιλογή για το πόσους peers θα μπορούσαμε να
παίρνουμε τα αρχεία.
Θα μπορούσαν να κάνουν μετρήσεις και για
κατανάλωση ενέργειας στις συσκευές (future
work).
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
11
12.
1η P2P app για mobile Android
Video streaming P2P
Ελπιδοφόρα αποτελέσματα από τα
πειράματα για συνέχεια σε αυτό το τομέα
Wireless and Mobile
Communications - Boursinos
Christos - MSc CS AUEB
12