Inter-module Interfacing techniques for SoCs with multiple clock domains to address challenges in modern deep sub-micron technologies

Miniaturization of integrated circuits (ICs) due to the improvement in lithographic techniques in modem deep sub-micron (DSM) technologies allows several complex processing elements to coexist in one IC, which are called System-on-Chip. As a first contribution, this thesis quantitatively analyzes the severity of timing constraints associated with Clock Distribution Network (CDN) in modem DSM technologies and shows that different processing elements may work in different dock domains to alleviate these constraints. Such systems are known as Globally Asynchronous Locally Synchronous (GALS) systems. It is imperative that different processing elements of a GALS system need to communicate with each other through some interfacing technique, and these interfaces can be asynchronous or synchronous. Conventionally, the asynchronous interfaces are described at the Register Transfer Logic (RTL) or system level. Such designs are susceptible to certain design constraints that cannot be addressed at higher abstraction levels; crosstalk glitch is one such constraint. This thesis initially identifies, using an analytical model, the possibility of asynchronous interface malfunction due to crosstalk glitch propagation. Next, we characterize crosstalk glitch propagation under normal operating conditions for two different classes of asynchronous protocols, namely bundled data protocol based and delay insensitive asynchronous designs. Subsequently, we propose a logic abstraction level modeling technique, which provides a framework to the designer to verify the asynchronous protocols against crosstalk glitches. The utility of this modeling technique is demonstrated experimentally on a Xilinx Virtex-II Pro FPGA. Furthermore, a novel methodology is proposed to quench such crosstalk glitch propagation through gating the asynchronous interface from sending the signal during potential glitch vulnerable instances. This methodology is termed as crosstalk glitch gating. This technique is successfully applied to obtain crosstalk glitch quenching in the representative interfaces. This thesis also addresses the dock skew challenges faced by high-performance synchronous interfacing methodologies in modem DSM technologies. The proposed methodology allows communicating modules to run at a frequency that is independent of the dock skew. Leveraging a novel clock-scheduling algorithm, our technique permits a faster module to communicate safely with a slower module without slowing down. Safe data communications for mesochronous schemes and for the cases when communicating modules have dock frequency ratios of integer or coprime numbers are theoretically explained and experimentally demonstrated. A clock-scheduling technique to dynamically accommodate phase variations is also proposed. These methods are implemented to the Xilinx Virtex II Pro technology. Experiments prove that the proposed interfacing scheme allows modules to communicate data safely, for mesochronous schemes, at 350 MHz, which is the limit of the technology used, under a dock skew of more than twice the time period (i.e. a dock skew of 12 ns

Topical Workshop on Electronics for Particle Physics

The purpose of the workshop was to present results and original concepts for electronics research and development relevant to particle physics experiments as well as accelerator and beam instrumentation at future facilities; to review the status of electronics for the LHC experiments; to identify and encourage common efforts for the development of electronics; and to promote information exchange and collaboration in the relevant engineering and physics communities

Journalism: New Challenges

In seeking to identify and critique a range of the most pressing challenges confronting journalism today, this book examines topics such as: the role of the journalist in a democratic society, including where questions of truth and free speech are concerned; the changing priorities of newspaper, radio, television, magazine, photography, and online news organisations; the political, economic and technological pressures on news and editorial independence; the impact of digital convergence on the forms and practices of newsgathering and storytelling; the dynamics of professionalism, such as the negotiation of impartiality and objectivity in news reports; journalists’ relationships with their sources, not least where the ‘spin’ of public relations shapes what’s covered, how and why; evolving genres of news reporting, including politics, business, sports, celebrity, documentary, war and peace journalism; journalism’s influence on its audiences, from moral panics to the trauma of representing violence and tragedy; the globalisation of news, including the role of international news agencies; new approaches to investigative reporting in a digital era; and the rise of citizen journalism, live-blogging and social media, amongst many others. The chapters are written in a crisp, accessible style, with a sharp eye to the key ideas, concepts, issues and debates warranting critical attention. Each ends with a set of ‘Challenging Questions’ to explore as you develop your own perspective, as well as a list of ‘Recommended Reading’ to help push the conversation onwards. May you discover much here that stimulates your thinking and, with luck, prompts you to participate in lively debate about the future of journalism

Narrative motion on the two-dimensional plane: the “video-ization” of photography and characterization of reality

"Art is not truth. Art is a lie that enables us to recognize truth" Pablo Picasso Time, as known to many, is an indispensable component of photography. Period(s) included in “single” photographs are usually and naturally much shorter than periods documented in video works. Yet, when it comes to combining photos taken at different times on one photographical surface, it becomes possible to see remnants of longer periods of time. Whatever method you use, the many traces left by different moments, lead to the positive notion of timelessness (lack of time dependence) due to the plural presences of time at once. This concept of timelessness sometimes carries the content of the photo to anonymity, the substance becomes multi-layered and hierarchy disappears. This paper focuses on creating photographical narratives within the two-dimensional world. The possibility of working in layers with transparency within the computer environment enables us to overlay succession of moments seized from time on top of each other, in order to create a storyline spread in time that is otherwise not possible to express in a single photograph, unless properly staged. Truth with the capital T is not taken as the departure point in this article; on the contrary, personal delineations of temporary yet experienced smaller realities is suggested

Bowdoin Orient v.109, no.1-25 (1979-1980)

https://digitalcommons.bowdoin.edu/bowdoinorient-1980s/1000/thumbnail.jp

Bowdoin Orient v.139, no.1-26 (2009-2010)

https://digitalcommons.bowdoin.edu/bowdoinorient-2010s/1000/thumbnail.jp

Improving somatic health for outpatients with severe mental illness: the development of an intervention

Objective: Patients with severe mental illness (SMI) suffer from more somatic illness than the general population. Possible causes are side effects of neuropsychiatric medication, genetic vulnerability, insufficient health care and lifestyle. This co-morbidity is potentially reversible and augments the costs for health care and diminishes quality of life. Screening on symptoms and risks of somatic diseases and coordination of care are proposed to improve SMI-patients' somatic health status. Methods: A clinical facility was started to improve the somatic health status of patients in an outpatient centre in southern Netherlands. This outpatient centre was added to the specialized care for severe and enduring SMI. The intervention consisted of the inventarisation of side-effects and the detection of gaps in health care provision for 72 patients. This was based on interviewing the patients, laboratory screening, collecting information from their general practitioner and pharmacy. A list was compiled of possible diagnosis and health risks, and a plan of action was made for the treatment. Healthcare consumption, quality of life and general functioning were assessed to analyze cost-effectiveness. Evaluations were performed with the psychiatric care team on the process. Results: Mean annual cost of GP's and medical specialist's consultations were E492. There existed a negative relation between EQ5D VAS and the number of self reported chronic diseases. Conclusion: The authors conclude that the procedure is well feasible, but should be set up in close collaboration with all health care professionals of these patients to make tailor made solutions possible

Maritime expressions:a corpus based exploration of maritime metaphors

This study uses a purpose-built corpus to explore the linguistic legacy of Britain’s maritime history found in the form of hundreds of specialised ‘Maritime Expressions’ (MEs), such as TAKEN ABACK, ANCHOR and ALOOF, that permeate modern English. Selecting just those expressions commencing with ’A’, it analyses 61 MEs in detail and describes the processes by which these technical expressions, from a highly specialised occupational discourse community, have made their way into modern English. The Maritime Text Corpus (MTC) comprises 8.8 million words, encompassing a range of text types and registers, selected to provide a cross-section of ‘maritime’ writing. It is analysed using WordSmith analytical software (Scott, 2010), with the 100 million-word British National Corpus (BNC) as a reference corpus. Using the MTC, a list of keywords of specific salience within the maritime discourse has been compiled and, using frequency data, concordances and collocations, these MEs are described in detail and their use and form in the MTC and the BNC is compared. The study examines the transformation from ME to figurative use in the general discourse, in terms of form and metaphoricity. MEs are classified according to their metaphorical strength and their transference from maritime usage into new registers and domains such as those of business, politics, sports and reportage etc. A revised model of metaphoricity is developed and a new category of figurative expression, the ‘resonator’, is proposed. Additionally, developing the work of Lakov and Johnson, Kovesces and others on Conceptual Metaphor Theory (CMT), a number of Maritime Conceptual Metaphors are identified and their cultural significance is discussed