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Advances in Computing Infrastructure
Published in Siyong Kim, John Wong, Advanced and Emerging Technologies in Radiation Oncology Physics, 2018
Yulong Yan, Alicia Yingling, Steve Jiang
Disk storage in enclosed formats has been advancing steadily. Devices are more affordable and effective because of increased data densities (and reduced sizes) and increased throughput due to greater data volume under a read head. Because applications on workstations use disk storage extensively, performance can improve noticeably in terms of application response. Modern solid-state storage has the misnomer of a solid-state disk (SSD), but in reality it consists of solid-state, nonvolatile storage memory in the same form factor as historic disk drives.
On geometrical configurations of vibration-driven piezoelectric energy harvesters for optimum energy transduction: A critical review
Published in Mechanics of Advanced Materials and Structures, 2023
Dauda Sh. Ibrahim, Yuxiang Feng, Xing Shen, Umer Sharif, Abdurrahman Ahmad Umar
The main concept behind vibration energy scavenging is to convert mechanical energy in oscillating structures to electrical energy using harvesters. Figure 1 shows a typical model of an energy harvesting system. Basically, it is made up of three major parts, namely: energy source, energy harvesting device, and electrical load. The energy source is the reservoir of kinetic energy to be harnessed as presented in Table 1. The second component is the energy harvesting device, which deals with energy conversion from mechanical to electrical energy by means of a transducer and then subsequently rectification of the converted energy (i.e., AC/DC conversion). This eventually leads to the management of the refined energy by using super capacitors or other solid-state storage devices. The last component is the load to be powered, which could be an ultra-low power sensor, MEMS device, or data transmitter. Conversion of the ambient vibration energy is often achieved via the following methods: electromagnetic field [14–16], piezoelectric-based materials [17–19], and electrostatic devices [20–22]. Among these transduction mechanisms, utilizing piezoelectric materials has been the best choice for the design of harvesters. Its superior power density [23, 24], and ease of integration with small-scale devices [25–29] makes it an excellent choice.
The adsorption of hydrogen on B36Li2+ 6 and the non-covalent interaction between them
Published in Molecular Physics, 2021
Hydrogen energy has the advantages of abundant, renewable, the highest heating value per mass and no pollution to the environment, and thus is considered as the alternative energy resource for fossil fuels. However, the storage technique is a substantial challenge to wide application of hydrogen energy [1]. Hydrogen storage requires high gravimetric and volumetric densities together with fast kinetics and favourable thermodynamics. Liquid storage at cryogenic temperatures and gas phase storage with high pressure are conventional methods at present. However, they face the problems of cost, safety and storage capacity [2]. Solid-state material is a potential choice [3]. The solid-state storage can be roughly divided into physical and chemical storage according to the bonding strength. A lot of solid-state hydrogen storage systems have been explored, such as carbon-based nanomaterials, metal atoms decorated covalent organic frameworks (COFS), metal organic frameworks (MOFS) and so on [4]. However, up to now, no one system has been found to reach a satisfactory level of performance. According to the thermodynamic calculation, the ideal hydrogen storage materials should have the feasible adsorption energies (about −0.10.2 eV) [5], which is just between the physical and chemical adsorption.
Building memory devices from biocomposite electronic materials
Published in Science and Technology of Advanced Materials, 2020
Xuechao Xing, Meng Chen, Yue Gong, Ziyu Lv, Su-Ting Han, Ye Zhou
The common feature of non-volatile memory is that the stored data will be retained even when the system power is off. Flash memory has been got a lot of interest due to higher chip density, multi-bit per cell storage properties and compatibility with the current complementary metal-oxide-semiconductor (CMOS) technology. On the other hand, the manufacturing cost of flash memory is much lower than that of EEPROM because byte-erasable EEPROM requires more area than block-erasable flash memory. Therefore, flash memory becomes most important and most widely adopted technology for non-volatile solid-state storage. According to the McClean Report, the flash memory occupied more than 40% market of the MOS memory IC market. Flash-memory-based on transistor structure can be further classified into two types-floating gate flash memory and charge-trapping flash memory [74].