Computer Engineering Commons^™

Energy Overhead Of The Graphical User Interface In Server Operating Systems, Heather Brotherton, J. Eric Dietz, John Mcgrory, Fred Mtenzi

Heather M Brotherton

Evidence of graphical user interface server operating system energy overhead is presented. It is posed that data centers would have substantial energy savings by eliminating graphical user interface operating systems.

Rapport: Semantic-Sensitive Namespace Management In Large-Scale File Systems, Yu Hua, Hong Jiang, Yifeng Zhu, Dan Feng

Yifeng Zhu

Explosive growth in volume and complexity of data exacerbates the key challenge to effectively and efficiently manage data in a way that fundamentally improves the ease and efficacy of their use. Existing large-scale file systems rely on hierarchically structured namespace that leads to severe performance bottlenecks and renders it impossible to support real-time queries on multi-dimensional attributes. This paper proposes a novel semantic-sensitive scheme, called Rapport, to provide dynamic and adaptive namespace management and support complex queries. The basic idea is to build files’ namespace by utilizing their semantic correlation and exploiting dynamic evolution of attributes to support namespace management. …

Innovation And Learning Through Knowledge Gatekeepers:A Critical Examination Of The Relationship Betweentrust, Openness, And The Use Of Gatekeepers, Deogratias Harorimana Dr

Dr Deogratias Harorimana

The term ‘gatekeeper’ is widely used to represent a class of those who collect information, knowledge and contextualise this before they can share with the rest of the members of the organisation knowledge networks-both formal and informal organisations. In this study, it was found:

1 that there is a strong relationship between the openness of a given firm, as regards its knowledge sharing culture and level trust, and that firm’s use of knowledge gatekeepers

2 that the stage of a given firm’s growth corresponds to its strategic use of different types of gatekeeping.

In early and decline (renewal) stages, for …

Optimizing Parallel Belief Propagation In Junction Trees Using Regression, Lu Zheng, Ole J. Mengshoel

Ole J Mengshoel

Exploring Multiple Dimensions Of Parallelism In Junction Tree Message Passing, Lu Zheng, Ole J. Mengshoel

Ole J Mengshoel

Mobile Computing: Challenges And Opportunities For Autonomy And Feedback, Ole J. Mengshoel, Bob Iannucci, Abe Ishihara

Ole J Mengshoel

Wireless Transmission Network : A Imagine, Radhey Shyam Meena Engineer, Neeraj Kumar Garg Asst.Prof

Radhey Shyam Meena

World cannot be imagined without electrical power. Generally the power is transmitted through transmission networks. This paper describes an original idea to eradicate the hazardous usage of electrical wires which involve lot of confusion in particularly organizing them. Imagine a future in which wireless power transfer is feasible: cell phones, household robots, mp3 players, laptop computers and other portable electronic devices capable of charging themselves without ever being plugged in freeing us from that final ubiquitous power wire. This paper includes the techniques of transmitting power without using wires with an efficiency of about 95% with non-radioactivemethods. In this paper …

A Scada System Using Mobile Agent For Next Generation Distribution System, Radhey Shyam Meena Er.

Radhey Shyam Meena

Industrial revolution worldwide. It has resulted in social changes too and raised the standard of living we examine a future distribution system capable of solving problems caused by the connection of numerous distributed generators. A supervisory-control-and-data-acquisition (SCADA) system for this distribution system should be economical, flexible, and reliable, and should execute a real-time process

Battery Energy Storage System In Solar Power Generation, Radhey Shyam Meena Er., Deepa Sharma

Radhey Shyam Meena

Grid-connected solar PV dramatically changes the load profile of an electric utility customer. The expected widespread adoption of solar generation by customers on the distribution system poses significant challenges to system operators both in transient and steady state operation, from issues including voltage swings, sudden weather-induced changes in generation, and legacy protective devices designed with one-way power flow in mind

Cfp: Handbook Of Research On Technological Applications And Innovation For Economic Development, Deogratias Harorimana Mr

Dr Deogratias Harorimana

The innovation in the 21st century goes significantly beyond the high-tech picture driven by small or large industry clusters in a specific region-typically Silicon Valley and M4Corridor. The future of innovation will lie within knowledge management and seamless technological applications. These will be supported by planned funding strategies, possibly with clients as drivers of the innovation. This view seems to be supported by the UK government “Technology and Innovation Futures” (2011); the USA government (2011), study into which leading scholars concede that the future innovation and technological applications for economic growth will include products and processes, improvements in areas such …

Describing Radio Hardware And Software Using Owl For Over-The-Air Software Download, Todor Cooklev, Stanchev, David Clendenen

Todor Cooklev

Recently, several researchers have discovered the need for radios to use description techniques. Previous research describes information such as the current frequency band, waveform, and so on. However, this information is presented at a level that is not sufficient to determine software/hardware compatibility for over-the-air software download. For example, a device should not attempt to download a wideband waveform if its radio front-end is only narrowband, or if its baseband hardware cannot provide the required MIPS for the new waveform. Over-the-air software download is one of the most interesting features of software-defined radios. The compatibility between software and hardware prior …

Greek Patent Protection System And The Impacts Of Information Technology Industry, Emmanouil Alexander Zografakis Ez

Emmanouil Alexander Zografakis EZ

Our era can be characterized as the era of knowledge proliferation and bountifulness. That has marked our era as the era following the pace of the Information Society Development. Information Society has also brought about a remarkable IT development pace over countries. Thereby, it is greatly important all that raw knowledge to become mind figments, ideas and even inventions and innovations. It is also essential to highlight that such a beneficial process will ensure the continuity of the IT development. The only way to achieve that goal is to find a way to secure all that aforementioned knowledge which is …

Self-Organization Of A Mesh Hierarchy For Smart Grid Monitoring In Outage Scenarios, Arjun Athreya, Patrick Tague

Patrick Tague

Current hierarchical communication infrastructure in the smart grid is not robust for data collection from smart meters during outages. In this work, we propose a self-organizing multi-channel wireless communication framework to aid in data collection for smart grid health monitoring. We propose a two-stage bootstrapping process in which nodes first self-organize into local mesh clusters by flattening the provisioned hierarchy and then interconnect to provide mesh connectivity from the outage region to functioning regions of the grid. We propose to construct this mesh-of-meshes hierarchy using a cross-layer strategy that jointly considers medium access limitations and the asymmetric traffic flow that …

Battery Energy Storage System In Solar Power Generation, Radhey Shyam Meena Er.

Radhey Shyam Meena

As solar photovoltaic power generation becomes more commonplace, the inherent intermittency of the solar resource poses one of the great challenges to those who would design and implement the next generation smart grid. Specifically, grid-tied solar power generation is a distributed resource whose output can change extremely rapidly, resulting in many issues for the distribution system operator with a large quantity of installed photovoltaic devices. Battery energy storage systems are increasingly being used to help integrate solar power into the grid. These systems are capable of absorbing and delivering both real and reactive power with sub-second response times. With these …

Career Advising Workshop Exercise For Software Engineers, Todd Sedano, Mikelynn Romero

Todd Sedano

Carnegie Mellon University’s Silicon Valley Campus (CMU-SV) attracts science, technology, engineering, and math (STEM) students who want to make an impact in Silicon Valley, an area known for its innovative and entrepreneurial culture. The goal of the various CMU-SV masters programs is to provide a transformative educational experience – one that changes how the students perform in the workplace. The students are immersed in a “learn-by-doing” environment that makes them valuable members of the workforce as they graduate with practical experience in high-demand technical areas.

Despite this “state-of-the-art” graduate education in software engineering and software management, when it comes time …

Datacenter Efficiency Measures, Heather M. Brotherton

Heather M Brotherton

This document answers the questions, “What are relative energy efficiency measures (percentage of energy reductions) that are available to data centers for improving energy efficiency?” and, “What types of certifications are now available to data centers?”

Energy Costs For Data Center Operations, Heather M. Brotherton

Heather M Brotherton

This document answers the questions: What are relative energy costs for data center operations (energy per unit computing) and how do sources of fuel impact data center operation costs geographically across the US?

An Applied Approach To Teach Hospital Information Systems Development Using An Open Source Erp Framework, Seyed Mohammad Motahar, Shima Mostafavi, Syed Aljunid, Nurhizam Safie, Muriati Mokhtar

Seyed Mohammad Motahar

The objective of the paper is to represent an international pilot project to teach development of free and open source hospital Information systems at the national level using a live pre installed Enterprise Resource Planning (ERP) System. We have developed live image with pre installed free and open source ERP framework -Tryton® (A fork of openERP®) and a free and open source health and hospital information system GNU Health® that supports electronic medical records (EMR) which is developed on top of the ERP framework as the second layer. We considered the two layer system as a domain specific application development …

Transforming Information Systems And Computer Science Education With Virtualization, Maurice E. Dawson Jr., Jorja Wright, Jonathan Abramson

Maurice Dawson

This paper will propose an innovative method to transform information systems (IS) and computer science education on a global scale. This method will introduce the use of virtualization and cloud computing combined with open source software (OSS) in higher education. This will allow for those studying IS and computer science to work independently on projects anywhere in the world from a baseline image that has been developed with information assurance (IA) controls. Additionally, this will allow professors and course developers to deploy their own customized virtual machines (VMs) to be used with the course. These VMs will host their own …

Connectivity Of Wireless Ad Hoc Networks: Impacts Of Antenna Models, Qiu Wang, Hong-Ning Dai, Qinglin Zhao

Hong-Ning Dai

This paper concerns the impact of various antenna models on the network connectivity of wireless ad hoc networks. Existing antenna models have their pros and cons in the accuracy reflecting realistic antennas and the computational complexity. We therefore propose a new directional antenna model called Approx-real to balance the accuracy against the complexity. We then run extensive simulations to compare the existing models and the Approx-real model in terms of the network connectivity. The study results show that the Approx-real model can better approximate the best accurate existing antenna models than other simplified antenna models, while introducing no high computational …

Eavesdropping Security In Wireless Ad Hoc Networks With Directional Antennas, Qiu Wang, Hong-Ning Dai, Qinglin Zhao

Hong-Ning Dai

The eavesdropping security of wireless ad hoc networks has attracted considerable attention recently. However, most of current studies only consider OMN networks, where each node is mounted with a single omni-directional antenna, which radiates radio signals in all directions and consequently leads to the high eavesdropping possibility. Compared with an omnidirectional antenna, a directional antenna can concentrate the radio signals on some desired directions so that it can potentially reduce the eavesdropping possibility. This paper investigates the eavesdropping security of wireless ad hoc networks equipped with directional antennas. In particular, we study the eavesdropping possibility of OMN networks, SDA networks …

An Overview Of Using Directional Antennas In Wireless Networks, Hong-Ning Dai, Kam-Wing Ng, Min-You Wu

Hong-Ning Dai

Compared with omni-directional antennas, directional antennas have many merits, such as lower interference, better spatial reuse, longer transmission range and the improved network capacity. Directional antennas enable numerous emerging outdoor and indoor applications, which have been addressed in many recent studies. Despite the advances in wireless networks with directional antennas (DAWNs), there are many research challenges in all layers of DAWNs. This paper presents a detailed study on recent advances and open research issues on DAWNs. Firstly, we briefly introduce the classification of directional antennas, antenna radiation patterns, antenna modes as well as the challenges in the physical layer of …

Channel Allocation In Wireless Networks With Directional Antennas, Hong-Ning Dai, Kam-Wing Ng, Min-You Wu

Hong-Ning Dai

In this paper, we study the channel allocation in multi-channel wireless ad hoc networks with directional antennas. In particular, we investigate the problem: given a set of wireless nodes equipped with directional antennas, how many channels are needed to ensure collision-free communications? We derive the upper bounds on the number of channels, which heavily depend on the node density and the interference ratio (i.e., the ratio of the interference range to the transmission range). We construct several scenarios to examine the tightness of the derived bounds. We also take the side-lobes and back-lobes as well as the signal path loss …