Sequential File Prefetching in Linux

2010 ◽  
pp. 218-261 ◽  
Author(s):  
Fengguang Wu
Keyword(s):  
Case Studies ◽  
Computer Hardware ◽  
Dynamic Behaviors ◽  
Sequential File ◽  
New Challenges ◽  
Static Logic ◽  
Established Technique

Sequential prefetching is a well established technique for improving I/O performance. As Linux runs an increasing variety of workloads, its in-kernel prefetching algorithm has been challenged by many unexpected and subtle problems; As computer hardware evolves, the design goals should also be adapted. To meet the new challenges and demands, a prefetching algorithm that is aggressive yet safe, flexible yet simple, scalable yet efficient is desired. In this chapter, the author explores the principles of I/O prefetching and present a demand readahead algorithm for Linux. He demonstrates how it handles common readahead issues by a host of case studies. Both static, logic and dynamic behaviors of the readahead algorithm are covered, so as to help readers building both theoretical and practical views of sequential prefetching.

Use of Lock-In Thermography for Non-Destructive 3D Defect Localization on System in Package and Stacked-Die Technology

2011 ◽  
Author(s):  
Rudolf Schlangen ◽  
Shinobu Motegi ◽  
Toshi Nagatomo ◽  
Christian Schmidt ◽  
Frank Altmann ◽  
...  
Keyword(s):  
Case Studies ◽  
Simulation Software ◽  
Heat Sources ◽  
Internal Reference ◽  
Short Introduction ◽  
3D Localization ◽  
Defect Localization ◽  
New Challenges ◽  
Lock In ◽  
Non Destructive

Abstract With the growing variety, complexity and market share of 3D packaged devices, package level FA is also facing new challenges and higher demand. This paper presents Lock-In Thermography (LIT) for fully non-destructive 3D defect localization of electrical active defects. After a short introduction of the basic LIT theory, two slightly different approaches of LIT based 3D localization will be discussed based on two case studies. The first approach relies on package internal reference heat sources (e.g. I/O-diodes) on different die levels. The second approach makes use of calibrated 3D simulation software to yield the differentiation between die levels in 8 die µSD technology.

Social Media for Mental Health Initiatives

2018 ◽  
pp. 210-224
Author(s):  
Gemma Richardson
Keyword(s):  
Mental Health ◽  
Social Media ◽  
Mental Illness ◽  
Case Studies ◽  
Suicide Prevention ◽  
Vulnerable Populations ◽  
Health Issues ◽  
Mental Health Issues ◽  
Health Initiatives ◽  
New Challenges

Social media has added a new dynamic for those living with mental illness. There are several benefits to using social media to obtain information and support for mental health issues, but there are also new challenges and drawbacks. This chapter explores social media for mental health initiatives, with a focus on two case studies: Facebook's suicide prevention tools and the Bell Let's Talk campaign. These case studies highlight the unique ways that social media can be harnessed to raise awareness and provide support and resources to vulnerable populations, while also providing insights into the challenges of utilizing these platforms.

Critical Perspectives on Ageing: New Challenges for Gerontology

1996 ◽  
Vol 16 (4) ◽  
pp. 467-487 ◽  
Author(s):  
Meredith Minkler
Keyword(s):  
Political Economy ◽  
Case Studies ◽  
Culturally Relevant ◽  
Critical Gerontology ◽  
Feminist Perspectives ◽  
New Challenges ◽  
Ways Of Thinking ◽  
Humanistic Orientation ◽  
Critical Perspectives

AbstractCritical gerontology may be seen as evolving along two paths simultaneously, one embracing a broad political economy of ageing framework, and the second emerging from a humanistic orientation. This paper will present and highlight the special contributions of each of these pathways to the understanding of ageing and growing old. Emergent feminist perspectives on ageing, and ‘culturally relevant ways of thinking’ about ageing and diversity will then be presented as complementing and extending critical gerontology. The concept of empowerment will be seen as linking all four of these conceptual approaches, and case studies and examples will be used to illustrate the relevance of these alternative perspectives for better understanding and addressing the problems and challenges facing gerontology in the years ahead.

scholarly journals Speculating with glitches: keeping the future moving

2020 ◽  
Author(s):  
Shawn Bodden ◽  
Jen Ross
Keyword(s):  
Online Learning ◽  
Learning Environment ◽  
Case Studies ◽  
Real World ◽  
Power Relations ◽  
Online Learning Environment ◽  
Technical Error ◽  
First Case ◽  
New Challenges ◽  
The Government

This paper explores the glitch as a generative problem which is capable of introducing unanticipated possibilities and futures into situations. We understand the glitch as a sociomaterial encounter rather than merely a technical error, and argue that it calls for (re)consideration of here-and-now possible futures through practices of response and repair. Exploring the ways that people seek to respond to glitches, we consider two case studies in which unexpected problems provoke those involved to speculate playfully and practically about new possibilities. In the first case, a malfunctioning ‘Teacherbot’ incites new challenges and pedagogical opportunities in an online learning environment. In the second, Hungarian activists creatively use infrastructural and political problems to make new spaces of protest and to press the government to respond to their concerns. Considering these empirical cases allows us to observe how playful and disruptive dispositions have worked to question the terms of possible futures in the real world, and to unsettle the seemingly given terms of power-relations. Glitches are not a panacea, but they can provide an impetus to act from within situations that are uncertain, and can therefore point to new trajectories and possible futures.

Social Media for Mental Health Initiatives

2021 ◽  
pp. 402-413
Author(s):  
Gemma Richardson
Keyword(s):  
Mental Health ◽  
Social Media ◽  
Mental Illness ◽  
Case Studies ◽  
Suicide Prevention ◽  
Vulnerable Populations ◽  
Health Issues ◽  
Mental Health Issues ◽  
Health Initiatives ◽  
New Challenges

Social media has added a new dynamic for those living with mental illness. There are several benefits to using social media to obtain information and support for mental health issues, but there are also new challenges and drawbacks. This chapter explores social media for mental health initiatives, with a focus on two case studies: Facebook's suicide prevention tools and the Bell Let's Talk campaign. These case studies highlight the unique ways that social media can be harnessed to raise awareness and provide support and resources to vulnerable populations, while also providing insights into the challenges of utilizing these platforms.

Large-Scale Land Acquisitions, Livelihoods, and Gender Configurations in Zimbabwe

2015 ◽  
pp. 130-144 ◽  
Author(s):  
Patience Mutopo ◽  
Manase Kudzai Chiweshe ◽  
Chipo Plaxedes Mubaya
Keyword(s):  
Food Security ◽  
Case Studies ◽  
Rural Women ◽  
Large Scale ◽  
Rural Livelihoods ◽  
Land Loss ◽  
Land Acquisitions ◽  
New Challenges ◽  
Large Scale Land ◽  
And Gender

The notion of large-scale land acquisitions has been topical in recent years in Zimbabwe; it has even created more nuanced debates, since 70% of rural women in Zimbabwe are the majority of food producers. Foreign and locally orchestrated land deals have presented new challenges and threats to the livelihoods of women in rural Zimbabwe, at a time of land redistributive programs that have been viewed nationally and internationally as chaotic, affecting the food security, economic prowess, and international relations of Zimbabwe. The main aim of this chapter is to examine how women are particularly affected by the investments, based on three case studies. An analysis of the Zimbabwean scenario is presented with regards to participatory methodologies that reflect women's rural livelihoods and land loss.

Anti-system Contentions and Authoritarian Response in China: Evolution and Mechanisms

2017 ◽  
Vol 53 (3) ◽  
pp. 401-419 ◽  
Author(s):  
Jingkai He ◽  
Zhenhua Su
Keyword(s):  
Case Studies ◽  
Political Opportunity ◽  
Social Actors ◽  
Opportunity Structures ◽  
Political Opportunity Structures ◽  
New Challenges ◽  
Empirical Case Studies ◽  
New Framework

This paper proposes a new framework to analyze social contentions in China from the perspectives of contention motives and mobilization channels, explains why traditional forms of contention do not undermine the Chinese Communist Party’s (CCP) rule, and identifies anti-system contention as a distinctive form of contention that poses the greatest challenge to the CCP’s rule. Through analysis of political opportunity structures and mobilization mechanisms that allowed anti-system contentions to rise, this paper argues that since such contentions mainly consist of value-oriented social actors mobilized via informal channels, it would require the Chinese regime to adapt to a more targeted and coordinated model of repression to address the new challenges. The paper further provides empirical case studies to show the effectiveness of the regime’s adaptive repression and shows that anti-system contentions in China face their own hurdle to develop into more prominent contentions.

scholarly journals Redefining the ME

2004 ◽  
Vol 126 (09) ◽  
pp. 34-38
Author(s):  
Alan S. Brown
Keyword(s):  
Virtual Reality ◽  
Video Games ◽  
Case Studies ◽  
Medical Devices ◽  
Diesel Fuel ◽  
New Technologies ◽  
Artificial Bone ◽  
Global Marketplace ◽  
Fuel Injectors ◽  
New Challenges

This article focuses on new technologies and skills that change the profession as it seeks to fit a wide-open global marketplace. Mechanical engineers are actively involved in analyzing the workings of muscle, developing interfaces for artificial nerves, creating virtual reality environments, building nanomachines and medical nanodiagnostics, and even creating realistic physical rules for video games. The MIT-Wharton international vehicle program is collecting case studies from component makers to determine what types of manufacturing are best suited for overseas facilities. The institute’s preliminary findings are not surprising. A manufacturer of diesel fuel injectors that runs a highly automated plant with clean rooms and tight-tolerance production may prefer to stay close to local technologists. Biomechanics, which develops prosthetics and medical devices, is already a growing field. In the future, though, new challenges will involve the mechanical aspects of artificial bone, skin, muscle, nerves, and even organs at both the cellular and tissue levels.

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