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You searched for subject:(Wearable storage). Showing records 1 – 3 of 3 total matches.

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Georgia Tech

1. Huang, Jian. Exploiting intrinsic flash properties to enhance modern storage systems.

Degree: PhD, Computer Science, 2017, Georgia Tech

The longstanding goals of storage system design have been to provide simple abstractions for applications to efficiently access data while ensuring the data durability and security on a hardware device. The traditional storage system, which was designed for slow hard disk drive with little parallelism, does not fit for the new storage technologies such as the faster flash memory with high internal parallelism. The gap between the storage system software and flash device causes both resource inefficiency and sub-optimal performance. This dissertation focuses on the rethinking of the storage system design for flash memory with a holistic approach from the system level to the device level and revisits several critical aspects of the storage system design including the storage performance, performance isolation, energy-efficiency, and data security. The traditional storage system lacks full performance isolation between applications sharing the device because it does not make the software aware of the underlying flash properties and constraints. This dissertation proposes FlashBlox, a storage virtualization system that utilizes flash parallelism to provide hardware isolation between applications by assigning them on dedicated chips. FlashBlox reduces the tail latency of storage operations dramatically compared with the existing software-based isolation techniques while achieving uniform lifetime for the flash device. As the underlying flash device latency is reduced significantly compared to the conventional hard disk drive, the storage software overhead has become the major bottleneck. This dissertation presents FlashMap, a holistic flash-based storage stack that combines memory, storage and device-level indirections into a unified layer. By combining these layers, FlashMap reduces critical-path latency for accessing data in the flash device and improves DRAM caching efficiency significantly for flash management. The traditional storage software incurs energy-intensive storage operations due to the need for maintaining data durability and security for personal data, which has become a significant challenge for resource-constrained devices such as mobiles and wearables. This dissertation proposes WearDrive, a fast and energy-efficient storage system for wearables. WearDrive treats the battery-backed DRAM as non-volatile memory to store personal data and trades the connected phone’s battery for the wearable’s by performing large and energy-intensive tasks on the phone while performing small and energy-efficient tasks locally using battery-backed DRAM. WearDrive improves wearable’s battery life significantly with negligible impact to the phone’s battery life. The storage software which has been developed for decades is still vulnerable to malware attacks. For example, the encryption ransomware which is a malicious software that stealthily encrypts user files and demands a ransom to provide access to these files. Prior solutions such as ransomware detection and data backups have been proposed to defend against encryption… Advisors/Committee Members: Qureshi, Moinuddin K. (advisor), Ramachandran, Umakishore (committee member), Kim, Taesoo (committee member), Swanson, Steven (committee member), Mickens, James (committee member), Badam, Anirudh (committee member).

Subjects/Keywords: Flash memory; Storage systems; Cloud storage; Wearable storage; Performance isolation; System security

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APA (6th Edition):

Huang, J. (2017). Exploiting intrinsic flash properties to enhance modern storage systems. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/60162

Chicago Manual of Style (16th Edition):

Huang, Jian. “Exploiting intrinsic flash properties to enhance modern storage systems.” 2017. Doctoral Dissertation, Georgia Tech. Accessed July 17, 2019. http://hdl.handle.net/1853/60162.

MLA Handbook (7th Edition):

Huang, Jian. “Exploiting intrinsic flash properties to enhance modern storage systems.” 2017. Web. 17 Jul 2019.

Vancouver:

Huang J. Exploiting intrinsic flash properties to enhance modern storage systems. [Internet] [Doctoral dissertation]. Georgia Tech; 2017. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/1853/60162.

Council of Science Editors:

Huang J. Exploiting intrinsic flash properties to enhance modern storage systems. [Doctoral Dissertation]. Georgia Tech; 2017. Available from: http://hdl.handle.net/1853/60162


Brunel University

2. Areir, Milad. Development of 3D printed flexible supercapacitors : design, manufacturing, and testing.

Degree: PhD, 2018, Brunel University

The development of energy storage devices has represented a significant technological challenge for the past few years. Electrochemical double-layer capacitors (EDLCs), also named as supercapacitors, are a likely competitor for alternative energy storage because of their low-cost, high power density, and high fast charge/discharge rate. The recent development of EDLCs requires them to be lightweight and flexible. There are many fabrication techniques used to manufacture flexible EDLCs, and these methods can include pre-treatment to ensure more efficient penetration of activated carbon (AC) patterns onto the substrate, or those that utilise masks for the definitions of patterns on substrates. However, these methods are inconvenient for building cost-effective devices. Therefore, it was necessary to find a suitable process to reduce the steps of manufacture and to be able to print multiple materials uniformly. This research work describes the first use of a 3D printing technology to produce flexible EDLCs for energy storage. In this research work, the four essential elements for the EDLCs substrate, current collector, activated electrode, and gel electrolyte were investigated. The AC powder was milled by ball milling to optimise the paste deposition and the electrochemical performance. A flexible composite EDLC was designed and manufactured by 3D printing. The electrochemical performance of the flexible composite EDLCs was then examined. Being highly flexible is one of the critical demands for the recent development of EDLCs. Therefore, highly flexible EDLCs were designed and manufactured by only one single extrusion process. The 3D highly flexible EDLC maintains significant electrochemical performance under a mechanical bending test. To meet the power and energy requirements, the EDLCs were connected and tested in series and parallel circuits. A supercapacitor based on printed AC material displays an area specific capacitance of 1.48 F/cm2 at the scan rate of 20 mV/s. The coulombic efficiency for the flexible EDLC was found to be 59.91%, and the cycling stability was achieved to be 56% after 500 cycles. These findings indicate that 3D printing technology may be increasingly used to develop more sophisticated flexible wearable electronic devices.

Subjects/Keywords: Electrical double-layer capacitors (EDLCs); 3D printing technology; Flexible supercapacitor; Wearable energy storage; Bending test

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Areir, M. (2018). Development of 3D printed flexible supercapacitors : design, manufacturing, and testing. (Doctoral Dissertation). Brunel University. Retrieved from http://bura.brunel.ac.uk/handle/2438/16659 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.765007

Chicago Manual of Style (16th Edition):

Areir, Milad. “Development of 3D printed flexible supercapacitors : design, manufacturing, and testing.” 2018. Doctoral Dissertation, Brunel University. Accessed July 17, 2019. http://bura.brunel.ac.uk/handle/2438/16659 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.765007.

MLA Handbook (7th Edition):

Areir, Milad. “Development of 3D printed flexible supercapacitors : design, manufacturing, and testing.” 2018. Web. 17 Jul 2019.

Vancouver:

Areir M. Development of 3D printed flexible supercapacitors : design, manufacturing, and testing. [Internet] [Doctoral dissertation]. Brunel University; 2018. [cited 2019 Jul 17]. Available from: http://bura.brunel.ac.uk/handle/2438/16659 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.765007.

Council of Science Editors:

Areir M. Development of 3D printed flexible supercapacitors : design, manufacturing, and testing. [Doctoral Dissertation]. Brunel University; 2018. Available from: http://bura.brunel.ac.uk/handle/2438/16659 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.765007


Brno University of Technology

3. Žák, Jaromír. Návrh a optimalizace senzorických systémů využívajících malovýkonových napájecích generátorů .

Degree: 2015, Brno University of Technology

Disertační práce se zabývá problematikou zpracování energie z alternativních zdrojů pomocí tzv. "Energy harvestingu". Řeší aktuální problém s napájením autonomních senzorických sítí, kdy u těžko dostupných zařízení nelze provádět výměnu primárního napájecího zdroje. V takových případech je třeba získávat energii z vnějších zdrojů, např. tepla, světla, pohybu apod. Navrhované řešení nachází uplatnění především v oblasti medicínských aplikací, zvláště u implantovaných zařízení (kochleární implantáty, kardiostimulátory, inzulinové pumpy atd.), ale také u systémů pro dlouhodobé monitorování zdravotního stavu pacienta. V práci byl zpracován aktuální stav problematiky nízkopříkonových senzorických systémů a přehled aktuálních možností alternativního napájení v souvislosti s těmito systémy. Z rešerše vyplynulo, že současné senzorické systémy jsou téměř připraveny pro implementaci malovýkonových zdrojů čerpajících energii z okolního prostředí ("Energy harvesting" zdrojů). Ty jsou vyvíjeny mnoha zahraničními vědeckými týmy, avšak existuje pouze několik variant zapojení následných obvodů pro efektivní čerpání, uchování a zpracování energie z těchto zdrojů, což nabízí široký prostor pro další možný výzkum. Problematika redistribuce energie z malovýkonových generátorů je v práci řešena na komplexní úrovni. Pro tyto účely byl vypracován a diskutován nový simulační model vybraného rozsáhlého senzorického systému (plně implantovatelné umělé kochley) v prostředí SPICE. S jeho využitím bylo navrženo několik nových přístupů pro řešení napájení (především technika protlačení náboje, tzv. "Charge Push Through"), které jsou aplikovatelné na většinu obecných typů senzorických systémů. Díky tomu bude v budoucnu umožněna praktická realizace senzorických systémů využívajících energii čerpanou z okolního prostředí.; Dissertation thesis is focused on using alternative energy sources called energy harvesting. This thesis offers a solution to problems with autonomous powering of sensor networks if primary power source recovery is impossible. In these cases, energy of the external power (e.g. temperature, light, motion) should be used. Proposed solution should be especially used in the field of medical applications (e.g. cochlear implants, pacemakers, insulin pumps). Long time monitoring of the personal health status is also possible when employing automated sensor systems. In this work, there is state of art review relating to the low power energy sources for an alternative powering of sensor systems. It was observed that existing systems are almost prepared for the implementation of energy harvesting power sources. The energy harvesting power sources have been developed by numerous researcher teams around the world, but there are only a few variants of power management circuits for effective energy gaining, storing and using. This area has a huge potential for the next research. The issues regarding to the distribution of gained energy are solved on the complex level in the thesis. For these purposes, a new simulation model of the whole system… Advisors/Committee Members: Hubálek, Jaromír (advisor).

Subjects/Keywords: senzorický systém; nositelná elektronika; řízení spotřeby; uchování energie; superkondenzátor; Charge Push-Through technika; energy harvesting; SPICE; kochleární implantát; sensor system; wearable electronics; power management; energy storage; supercapacitor; Charge Push-Through technique; energy harvesting; SPICE; cochlear implant

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Žák, J. (2015). Návrh a optimalizace senzorických systémů využívajících malovýkonových napájecích generátorů . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/51777

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Žák, Jaromír. “Návrh a optimalizace senzorických systémů využívajících malovýkonových napájecích generátorů .” 2015. Thesis, Brno University of Technology. Accessed July 17, 2019. http://hdl.handle.net/11012/51777.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Žák, Jaromír. “Návrh a optimalizace senzorických systémů využívajících malovýkonových napájecích generátorů .” 2015. Web. 17 Jul 2019.

Vancouver:

Žák J. Návrh a optimalizace senzorických systémů využívajících malovýkonových napájecích generátorů . [Internet] [Thesis]. Brno University of Technology; 2015. [cited 2019 Jul 17]. Available from: http://hdl.handle.net/11012/51777.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Žák J. Návrh a optimalizace senzorických systémů využívajících malovýkonových napájecích generátorů . [Thesis]. Brno University of Technology; 2015. Available from: http://hdl.handle.net/11012/51777

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.