Sökning: "it was realized that these devices"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden it was realized that these devices.

  1. 1. Differentially Private Federated Learning

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Nikolaos Tatarakis; [2019]
    Nyckelord :;

    Sammanfattning : Federated Learning is a way of training neural network models in a decentralized manner; It utilizes several participating devices (that hold the same model architecture) to learn, independently, a model on their local data partition. These local models are then aggregated (in parameter domain), achieving equivalent performance as if the model was trained centrally. LÄS MER

  2. 2. A Method for Driving the Solar Control Mechanism Selection

    Master-uppsats, Lunds universitet/Energi och ByggnadsDesign

    Författare :Vitaliya Mokhava; Christopher Nilsson; [2017]
    Nyckelord :Solar control mechanisms; Thermal comfort; Overheating; Solar control glass; Solar control blind; Technology and Engineering;

    Sammanfattning : Highly glazed spaces are continuously increasing in popularity due to architectural attractiveness. However, increased use of glass often jeopardizes thermal comfort in several ways and problem of overheating is one of them. A way to face this problem is to appropriately use solar control mechanisms. LÄS MER

  3. 3. Low-Power Policies Based on DVFS for the MUSEIC v2 System-on-Chip

    Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Siva Sai Reddy Mallangi; [2017]
    Nyckelord :Multi functional health monitoring wearable devices are quite prominent these days. Usually these devices are battery-operated and consequently are limited by their battery life from few hours to a few weeks depending on the application . Of late; it was realized that these devices; which are currently being operated at fixed voltage and frequency; are capable of operating at multiple voltages and frequencies. By switching these voltages and frequencies to lower values based upon power requirements; these devices can achieve tremendous benefits in the form of energy savings. Dynamic Voltage and Frequency Scaling DVFS techniques have proven to be handy in this situation for an efficient trade-off between energy and timely behavior. Within imec; wearable devices make use of the indigenously developed MUSEIC v2 Multi Sensor Integrated circuit - version 2.0 . This system is optimized for efficient and accurate collection; processing; and transfer of data from multiple health sensors. MUSEIC v2 has limited means in controlling the voltage and frequency dynamically. In this thesis we explore how traditional DVFS techniques can be applied to the MUSEIC v2. Experiments were conducted to find out the optimum power modes to efficiently operate and also to scale up-down the supply voltage and frequency. Considering the overhead caused when switching voltage and frequency; transition analysis was also done. Real-time and non real-time benchmarks were implemented based on these techniques and their performance results were obtained and analyzed. In this process; several state of the art scheduling algorithms and scaling techniques were reviewed in identifying a suitable technique. Using our proposed scaling technique implementation; we have achieved 86.95% power reduction in average; in contrast to the conventional way of the MUSEIC v2 chip’s processor operating at a fixed voltage and frequency. Techniques that include light sleep and deep sleep mode were also studied and implemented; which tested the system’s capability in accommodating Dynamic Power Management DPM techniques that can achieve greater benefits. A novel approach for implementing the deep sleep mechanism was also proposed and found that it can obtain up to 71.54% power savings; when compared to a traditional way of executing deep sleep mode. Keywords - low-power; DVFS; DPM; energy; wearable devices; voltage and frequency scal- ing; låg effekt; DVFS; DPM; energi; bärbara enheter; spänning och frekvensskalning;

    Sammanfattning : Multi functional health monitoring wearable devices are quite prominent these days. Usually these devices are battery-operated and consequently are limited by their battery life (from few hours to a few weeks depending on the application). LÄS MER

  4. 4. Smart Door Lock : A first prototype of a networked power lock controller with an NFC interface

    Kandidat-uppsats, KTH/Radio Systems Laboratory (RS Lab); KTH/Radio Systems Laboratory (RS Lab)

    Författare :Rafid Karim; Haidara Al-Fakhri; [2013]
    Nyckelord :Near Field Communication; Power over Ethernet; secure access; Internet of Things; Serial Peripheral Interface; MSP430; Närfältskommunikation; Ström via nätverk; Säker åtkomst; Sakernas Internet; Synkron Seriekommunikation; MSP430;

    Sammanfattning : Most major cell phone manufacturers have been releasing cell phones equipped with Near Field Communication (NFC). At the same time there is also increasing use of mobile payments and user verification with the use of the NFC technology. LÄS MER

  5. 5. Service Improvements for a VoIP Provider

    Master-uppsats, KTH/Kommunikationssystem, CoS

    Författare :Zhang Li; [2009]
    Nyckelord :VoIP; SIP; Asterisk; Symbian; JavaEE; JBoss; DoD;

    Sammanfattning : This thesis project is on helping a Voice over Internet Protocol (VoIP) service provider by improving server side of Opticall AB's Dial over Data solution. Nowadays, VoIP is becoming more and more popular. People use VoIP to call their family and friends every day. LÄS MER