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Head Positioning Servomechanism
Published in Abdullah Al Mamun, GuoXiao Guo, Chao Bi, Hard Disk Drive, 2017
Abdullah Al Mamun, GuoXiao Guo, Chao Bi
The HDD market is now dominated by 312 inch form factor drives; but the smaller form factors have shown a growth potential comparable to those of the 312 inch drives in the early years of 1990s. Starting in 2003, the growths of 212 inch, 1.8 inch, and 1 inch drives are 36%, 380% and 55%, respectively. Global shipment of small form factor drives (212 inch and below) was 50 million units in 2003 and is expected to reach 100 million units in 2006. Insatiable demand of notebook PC and application in consumer electronics, e.g., MP3, video camera etc are the main driving force behind this growth in the small form factor drives. As HDDs are being used in new applications, they are expected to meet more stringent performance specifications. For example, drives to be used in PDAs, camcorders, or automobiles must be able to withstand much larger vibration than those experienced by drives used in PC.
Technological Evolution of Wireless Neurochemical Sensing with Fast-Scan Cyclic Voltammetry
Published in Iniewski Krzysztof, Integrated Microsystems, 2017
Dan P. Covey, Kevin E. Bennet, Charles D. Blaha, Pedram Mohseni, Kendall H. Lee, Paul A. Garris
As we discuss in this section, significant reductions in overall dimensions, total weight, and power consumption can be achieved using VLSI-CMOS technology. System integration will also increase the signal-to-noise ratio, while decreasing overall dimensions and weight by minimizing the number of external components necessary for system operation. More recording channels can be added as well, without prohibitively increasing the form factor, and when coupled with low-power design techniques, will afford using advanced batteries with smaller size and extended lifetime as power supplies. This will in turn reduce the overall device size and weight even further. The resulting small form factor should be suitable for long-term implantation.
Other packaging needs
Published in Andrea Chen, Randy Hsiao-Yu Lo, Semiconductor Packaging, 2016
Andrea Chen, Randy Hsiao-Yu Lo
Packaging needs for digital image sensors have their own special requirements. For one thing, the sensors need to “see,” so nothing opaque can cover the chip surface. Also, the sensor surface and the clear cover must be kept extremely clean and handled carefully, so that dust and scratches do not degrade the image capture quality. Image sensor packages may come in many different formats, all derived from established package types. One of the more commonly used ones is the LCC (leadless chip carrier); an example using a plastic molded body with an opening on the top surface for the image sensor is shown in Figure 4.2. Images sensors packaged inside a LCC are cavity-up, wire bonded, and given a glass lid. They offer a small form factor and excellent thermal performance.
Design-Mediated Positive Emotion Regulation: The Development of an Interactive Device that Supports Daily Practice of Positive Mental Time Traveling
Published in International Journal of Human–Computer Interaction, 2022
JungKyoon Yoon, Shuran Li, Yu Hao
The feedback from the participants supports the fact that the design of Purpal played a crucial role in fostering users’ positive emotion regulation. In particular, in line with Desmet and Sääksjärvi (2016) that demonstrated the effectiveness of tangible design over other means in stimulating well-being-enhancing behaviors (e.g., experience recommendations), the tangibility of the Purpal interface made the interactions more pleasant and engaging, thereby increasing the effectiveness of its design. Most participants mentioned that the tangible interface of Purpal could visually remind and encourage them to practice PMTT, which would be easily forgotten during their busy life. This finding confirms the literature that addressed the importance of products’ tangibility in influencing users’ behaviors as they form the material context of daily lives, affecting users’ motivations (e.g., Morelli, 2007; Stephen M. Schueller et al., 2013). Note that the appropriateness of the design’s form factors (e.g., tangible and screen-based interface) is dependent on the users’ characteristics and usage contexts. For example, Yu et al. (2021) created an eye-free tangible device that trains respiration techniques with haptic feedback by considering office workers’ interaction preferences and contextual factors. The device proved effective in engaging its users in their work routines. Conversely, if form factors are inadequately chosen, the design would be of little use to intended users (Desmet & Sääksjärvi, 2016). This implies that Purpal’s form factors can be altered, if used in different settings (e.g., mobile app with IoT appliances, furniture-device-hybrid, and robotic companion).
Handheld Technology Selection, Evaluation, and Risk Mitigation Using Stochastic Analytical Hierarchical Process: A Standardization of the Request for Proposal Process
Published in Engineering Management Journal, 2022
Farjana Nur, Reuben F. Burch V, Mohammad Marufuzzaman, Brian K. Smith
Design Attributes (). Input Type: The mode by which the user will input data into the ruggedized device.Device size and form factor: Includes both device (outer casing) size and thickness. Form factor demonstrates the suitability of device use for field workers including how comfortably the device fits in the users’ hands.Weight: The total weight of a ruggedized handheld device.Casing ingress and drop protection: The ingress protection (IP) rating for protection against dust and water of a device in addition to the drop protection when the device is dropped from different heights onto different surfaces such as wood and concrete.Internal components: The size of internal components of the device impacting the overall volume of space needed for the device casing. These internal components include all aspects of the computer technology such as the motherboard, graphics and computer processors, memory and storage, and all the radios for wireless technology protocols that enable the connectivity to other devices and networks.Operating system: The operating system of the device. For devices of this kind as of the timing of this study, this almost always includes either Android or Microsoft Windows.Screen size: Size of the screen in inches typically measured diagonally.Battery life: The device run time on a full charge condition, the life span of the battery, and device charging time.Key arrangement style: The arrangement style of the keys on the keypad (typically alphabetical or QWERTY style).