Desktop Environment Research Articles

Enhanced Data Security Model for Cloud Computing Platform

Cloud Computing has continuously tremendous importance in the IT research field. As it is completely rely on sharing both physical and logical resources among numerous users, the concept of security must be considered, and deploying renewable security models must be taken into account. To obtain the highest level of security, some procedures must be implemented within a security model such as access control, authentication, authorization, data encryption, fast recovery, privacy, confidentiality, and attacks defending. This paper presents a proposed data security model for cloud computing. Some common attacks such as brute force attack and SQL injection are opposed. As data encryption plays the main role of data security, several modern encryption techniques are implemented and evaluated to deduce the most suitable technique to be used on cloud environment. The encryption techniques namely: AES, DES, 3DES, RC2, RC4, and Blowfish are evaluated based on randomness using NIST statistical testing. Also time consumed by each algorithm to decrypt the same amount of data is considered. Our model is deployed on Amazon Elastic Beanstalk cloud computing web server, and tests are run on two different environments; desktop environment and Amazon EC2 cloud computing environment. Our model is implemented using JSP language (Java Standard Edition), and NIST statistical tests are implemented using C# language.

Eye Gaze Tracking With a Web Camera in a Desktop Environment

This paper addresses the eye gaze tracking problem using a low cost and more convenient web camera in a desktop environment, as opposed to gaze tracking techniques requiring specific hardware, e.g., infrared high-resolution camera and infrared light sources, as well as a cumbersome calibration process. In the proposed method, we first track the human face in a real-time video sequence to extract the eye regions. Then, we combine intensity energy and edge strength to obtain the iris center and utilize the piecewise eye corner detector to detect the eye corner. We adopt a sinusoidal head model to simulate the 3-D head shape, and propose an adaptive weighted facial features embedded in the pose from the orthography and scaling with iterations algorithm, whereby the head pose can be estimated. Finally, the eye gaze tracking is accomplished by integration of the eye vector and the head movement information. Experiments are performed to estimate the eye movement and head pose on the BioID dataset and pose dataset, respectively. In addition, experiments for gaze tracking are performed in real-time video sequences under a desktop environment. The proposed method is not sensitive to the light conditions. Experimental results show that our method achieves an average accuracy of around $1.28 ^\circ$ without head movement and $2.27 ^\circ$ with minor movement of the head.

Developing a Mobile Based Automated Testing Tool for Windows Phone 8

Smart phones, or Mobile phones are quickly fetching the essential computer and communication tool in people’s life. Every phone has lots of applications and every application has its own different characteristics. Before producing these applications to the end user’s use, the developer should confirm that the applications are working smoothly, sans any technical glitches, and user friendly in every feature, and for that we use testing tools to check the compatibility of the software by using test applications like Eggplant, silk test, etc. But nowadays, every tool is designed for the desktop environment. In this project an application is being proposed for the windows phones by which an end-user can install the application in the mobiles directly. After this work the end user will be able to know if the apps are working properly or not, this will help us to catch all the information by executing the data, detecting the type and the kernel. This application will help us to install any application on our windows phone by the other devices and will help to grab the elements in the present applications. It is much faster and user friendly, because it will work without the need of a desktop, and we can run some more test cases as well.

응용프로그램의 기동시간 단축을 위한 파일 시스템 수준의 SSD 캐싱 기법

Application launch time is an important performance metric to user experience in desktop and laptop environment, which mostly depends on the performance of secondary storage. Application launch times can be reduced by utilizing solid-state drive (SSD) instead of hard disk drive (HDD). However, considering a cost-performance trade-off, utilizing SSDs as caches for slow HDDs is a practicable alternative in reducing the application launch times. We propose a new SSD caching scheme which migrates data blocks from HDDs to SSDs. Our scheme operates entirely in the file system level and does not require an extra layer for mapping SSD-cached data that is essential in most other schemes. In particular, our scheme does not incur mapping overheads that cause significant burdens on the main memory, CPU, and SSD space for mapping table. Experimental results conducted with 8 popular applications demonstrate our scheme yields 56% of performance gain in application launch, when data blocks along with metadata are migrated.

DaaS: A Cost‐Savings Strategy

Firms are looking to various IT strategies in the wake of the vendors providing services through cloud offerings. One of the newest is Desktop‐as‐a‐Service (DaaS). DaaS is providing end users with a desktop environment either through an internal data center or through a cloud provider. In either case, firms can eliminate many costs associated with maintaining separate desktops for its employees and consultants. The firm can also easily scale up and back with minimum investment while using DaaS. Thus, this article attempts to explain DaaS while explaining how firms will be able to achieve cost savings and operational efficiency by using DaaS. © 2015 Wiley Periodicals, Inc.

Cloud Computing: SaaS, PaaS, IaaS, Virtualization, Business Models, Mobile, Security and More

Cloud computing is changing the way businesses and users interact with computers and mobile devices. Gone are the days of expensive data centers, racks of disk drives, and large IT support teams. Today they are replaced with software applications delivered to users on demand from the cloud; with high-capacity, auto-replicated, secure, cloud-based disk storage and databases; with virtualized server and desktop environments; and with cloud- based collaboration tools that support the success of onsite. Remote and hybrid teams.

Desktop Computer Virtualization for Improvement Security, Power Consumption and Cost by SBC (Server Based Computer)

It is possible for virtualization of desktop to dramatically reduce maintenance costs and improve the security using various virtualization techniques rather than previous desktop environments. Also, with blocking beforehand the information leakage caused by data centralization, it is easy to manage the information security. This desktop virtualization provides creation and duplication of data and standardized desktop environments using easy and fast virtualization works. So, it is possible to improve efficiency, stability, and fusibility of virtualization. In this paper, with the desktop virtualization, the power saving effects are obtained from 65,750(kW) to 7,300(kW) , which is from 480(w) to 50 (w) for using one desktop for 8 hours per a day. In addition, the 62 desktops and 62 monitors are combined to one operational server with 62 thin clients. As a result of this, the security is improved greatly by data centralization, which the user can access the main server as a thin client with given space.

HTML5-기반 서울시 공공체육시설 통합 안내 사이트 구현

As people are highly interested in health, the number of people who participate in various sports programs is getting increased. But there is no web service which integrates all the information of the public sports facilities in Seoul and it’s convenient to use the public sport facilities. So we propose an integrated information system whoever can find the public sports facilities in Seoul. The public APIs for the Seoul public sports facilities provided by Seoul city are used to integrate the information. Also, our web page provides various graphic function using pictures and videos of the facilities on the environment of HTML5. And it is the responsive webpage which can be provided on both desktop and mobile environment. By implementing the wizard page, the managers of the facilities who are not specialized can renew the information about their facilities easily. And for the easier searching, we provides three options of searching: local, subjects, themes.

Cloud-Based Content Synchronization Method for Collaborative Learning Environment

Existing online education has moved from desktop environments to mobile environments due to the proliferation of smart devices. Online educational systems running on smart devices have the advantage of allowing users to learn online regardless of the location of the users. In particular, data synchronization enables users to cooperate on contents in real time anywhere by sharing their files via cloud storage. However, users cannot collaborate by simultaneously modifying files that are shared with one another. In this paper, we propose a content collaboration method and a history management technique that are based on distributed system structure and can synchronize data shared in the cloud for multiple users and multiple devices. Our proposed system helps users performing work on the collaborative content by automatically merging updated contents of cloud files among users.

Performance-based ontology matching

Ontology matching is among the core techniques used for heterogeneity resolution by information and knowledge-based systems. However, due to the excess and ever-evolving nature of data, ontologies are becoming large-scale and complex; consequently, leading to performance bottlenecks during ontology matching. In this paper, we present our performance-based ontology matching system. Today's desktop and cloud platforms are equipped with parallelism-enabled multicore processors. Our system benefits from this opportunity and provides effectiveness-independent data parallel ontology matching resolution over parallelism-enabled platforms. Our system decomposes complex ontologies into smaller, simpler, and scalable subsets depending upon the needs of matching algorithms. Matching process over these subsets is divided from granular to finer-level abstraction of independent matching requests, matching jobs, and matching tasks, running in parallel over parallelism-enabled platforms. Execution of matching algorithms is aligned for the minimization of the matching space during the matching process. We comprehensively evaluated our system over OAEI's dataset of fourteen real world ontologies from diverse domains, having different sizes and complexities. We have executed twenty different matching tasks over parallelism-enabled desktop and Microsoft Azure public cloud platform. In a single-node desktop environment, our system provides an impressive performance speedup of 4.1, 5.0, and 4.9 times for medium, large, and very large-scale ontologies. In a single-node cloud environment, our system provides an impressive performance speedup of 5.9, 7.4, and 7.0 times for medium, large, and very large-scale ontologies. In a multi-node (3 nodes) environment, our system provides an impressive performance speedup of 15.16 and 21.51 times over desktop and cloud platforms respectively.

An Innovative Science Gateway for the Cherenkov Telescope Array

The Cherenkov Telescope Array (CTA) is currently building the next generation, ground-based, very high-energy gamma-ray instrumentation. CTA is expected to collect very large datasets (in the order of petabytes) which will have to be stored, managed and processed. This paper presents a graphical user interface built inside a science gateway aiming at providing CTA-users with a common working framework. The gateway is WS-PGRADE/gUSE workflow-oriented and is equipped with a flexible SSO (based on SAML) to control user access for authentication and authorization. An interactive desktop environment is provided, called Astronomical & Physics Cloud Interactive Desktop (ACID). Users are able to exploit the graphical interface as provided natively by the tools included in ACID. A cloud data service shares and synchronizes data files and output results between the user desktop and the science gateway. Our solution is a first attempt towards an ecosystem of new technologies with a high level of flexibility to suit present and future requirements of the CTA community.

Designing a collaborative visual analytics system to support users’ continuous analytical processes

AbstractIn recent, numerous useful visual analytics tools have been designed to help domain experts solve analytical problems. However, most of the tools do not reflect the nature of solving real-world analytical tasks collaboratively because they have been designed for single users in desktop environments. In this paper, a complete visual analytics system is designed for solving real-world tasks having two integrated components: a single-user desktop system and an extended system suitable for a collaborative environment. Specifically, we designed a collaborative touch-table application (iPCA-CE) by adopting an existing single-user desktop analytical tool (iPCA). With the system, users can actively transit from individual desktop to shared collaborative environments without losing track of their analysis. They can also switch their analytical processes from collaborative to single-user workflows. To understand the usefulness of the system for solving analytical problems, we conducted a user study in both desktop and collaborative environments. From this study, we found that both applications are useful for solving analytical problems individually and collaboratively in different environments.

Interruptive notifications in support of task management

Our research explores how interruptive notifications support task management in a desktop environment. We conducted two user studies with a community of open source software users and developers to explore their experience with interruptive notifications. We found that certain kinds of notifications support multitasking, task prioritization, task management, as well as influence task disruption management. We discuss how these behaviors affect the notification-task management user experience and offer design guidelines derived from these results to inform better design of systems that interrupt through notification.

Customize Linux Operating System and Adding own Feature

A Linux distribution is an operating system made as a collection of software based around the Linux kernel and often around a package management system. A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system, window manager, and a desktop environment. Most of the included software is free software/open-source software which is distributed by its maintainers both as compiled binaries and in source code form, allowing users to modify and compile the original source code if they wish. Other software included with some distributions may be proprietary and may not be available in source code form. Linux distributions are almost universally Unix-like as described; the most notable exception is Android, which does not include a command-line interface and programs made for typical Linux distributions. There are currently over six hundred Linux distributions; over three hundred of those are in active development, constantly being revised and improved. One can distinguish between commercially backed distributions, such as Fedora (Red Hat), opens USE (SUSE), Ubuntu (Canonical Ltd.) and Mandriva Linux (Mandriva)[1], and entirely community-driven distributions, such as Debian, Slack ware, Gentoo[1] and Arch Linux. There is no facility such as Task Manager in all Linux distributions. Virtual Task Manager is the new feature we are going to add in our Customized operating system. Also we are going to provide a user friendly GUI which can be easily handled by new user. Ubuntu has the built-in utility to monitor or kill system running processes which acts like the “Task Manager”, it’s called System Monitor. Ctrl+Alt+Del shortcut key by default is used to bring up the log-out dialog on Ubuntu Unity Desktop. It is not useful for users who are used to quick access to the Task Manager. To change the settings of the key, open Keyboard utility from the Unity Dash (or System Settings -> Keyboard). On Shortcuts tab -> Custom Shortcuts, click the plus icon to add a shortcut. type in name Task Manager and command gnome-system-monitor.

Measurement and Characterization of 60GHz Proximity Channels in Desktop Environments with Electronic Device Chassis

Measurement and Characterization of 60GHz Proximity Channels in Desktop Environments with Electronic Device Chassis

A web based remote visualization architecture for big neuroimaging data

Event Abstract Back to Event A web based remote visualization architecture for big neuroimaging data Chao-Chun Chuang1* 1 National center for high-performance computing, Taiwan As recent neuroimaging research indicates, 3D visualization is helpful for understanding complex neuron structure. It also can help scientists share their visualization neuroimaging data and make their representation easier to understand [1][2]. In most cases, scientists downloaded these big neuroimaging data and then visualized on a local desktop environments with 3D visualization tools. However, in recent years, higher resolution datasets in the neuroimaging research continue massive growth with higher experimental resolving power. It becomes inconvenient to download these big neuroimaging data without enough network bandwidth and difficult to display these images in user client without enough computer resources. Thus, we demo a web-based remote visualization architecture for these big neuroimaging data, and take FlyCircuit 3D viewer as an example. FlyCircuit 3D viewer uses advanced 3-layer web technologies, web server (WebSockets, Canvas), visualization server (VNC and VirtualGL) and user client (HTML5) for interactive online 3D surface, skeleton and volumetric neuroimaging data in any web browser environments without requiring any browser plugin[2][3][4][5]. The first layer, web server communicates with the second layer visualization server by WebSockets and Canvas. Then third layer user client can view 3D neuroimaging data from web page constructed by HTML5. Thus, with powerful visualization server, users can easily interactive the 3D visualization neuron imaging by web browser in a lightweight computer resource. Finally, this visualization architecture can handle massive 3D neuronal image data collected in experiments from different research groups as well as manage bio-images with deeper neurological insight. Figure 1

Impact of Network Quality Deterioration on User’s Perceived Operability and Live-Migration of Virtual Machines in Remote Desktop Environments

The remote desktop environment (Virtual Desktop Infrastructure) is attracting interest as a way to strengthen security and support mobile access or telework. To realize the remote desktop environments, a remote desktop protocol is required to transfer information via a network about the user’s operations made on the keyboard and mouse on a terminal to the remote server. The growing popularity of remote desktop environments makes it important to determine the factors that govern the user’s perceived operability with a remote desktop protocol. It is also necessary important to find out the conditions for a wide-area live migration of virtual machines, to use resources efficiently in the remote desktop environments. This paper examines the impact of network quality deterioration (long network delay, high packet loss, small downlink bandwidth) on a user’s perceived operability in remote desktop environments, assuming RDP, PCoIP and ICA as remote desktop protocol. Next, this paper studies the impact of network quality on the performance of a live-migration of virtual machines in remote desktop environments.

Efficiency Sustainability Resource Visual Simulator for Clustered Desktop Virtualization Based on Cloud Infrastructure

Following IT innovations, manual operations have been automated, improving the overall quality of life. This has been possible because an organic topology has been formed among many diverse smart devices grafted onto real life. To provide services to these smart devices, enterprises or users use the cloud. Cloud services are divided into infrastructure as a service (IaaS), platform as a service (PaaS) and software as a service (SaaS). SaaS is operated on PaaS, and PaaS is operated on IaaS. Since IaaS is the foundation of all services, algorithms for the efficient operation of virtualized resources are required. Among these algorithms, desktop resource virtualization is used for high resource availability when existing desktop PCs are unavailable. For this high resource availability, clustering for hierarchical structures is important. In addition, since many clustering algorithms show different percentages of the main resources depending on the desktop PC distribution rates and environments, selecting appropriate algorithms is very important. If diverse attempts are made to find algorithms suitable for the operating environments’ desktop resource virtualization, huge costs are incurred for the related power, time and labor. Therefore, in the present paper, a desktop resource virtualization clustering simulator (DRV-CS), a clustering simulator for selecting clusters of desktop virtualization clusters to be maintained sustainably, is proposed. The DRV-CS provides simulations, so that clustering algorithms can be selected and elements can be properly applied in different desktop PC environments through the DRV-CS.

A Cloud-Based Environment for Collaborative Resources Management

The interaction between users and digital devices has deeply changed in the last decades. In particular, the so called desktop metaphor relied on assumptions which have been modified by the rise of new paradigms, such as Web 2.0 and Cloud Computing. This paper discusses the limits of the desktop metaphor and proposes a new interaction model, TablePlusPlus (T++), aimed at providing Web and Cloud users with interaction mechanisms fulfilling their needs, i.e., the possibility of handling activity contexts, collaborating with other users, and homogeneously managing heterogeneous objects. T++ tables provide a context-based environment which enables a homogeneous treatment of heterogeneous content items, enhanced by a table-level annotation mechanism supporting an abstract view over resources, which is missing in standard current desktop and collaborative environments. In order to evaluate the effectiveness of the proposed model, this work developed a prototype and tested it in two controlled experiments, whose results are definitely encouraging.

Visual Depth Perception of 3D CAD Models in Desktop and Immersive Virtual Environments

In this paper is presented an experimental study that aims to compare the depth perception of virtual prototypes in immersive virtual environments with the depth perception of CAD models using 2D LCD display. First, a multipurpose solution of a large-scale interactive multi wall projected virtual environment named Holo-CAVE is described and then the conducted experiments are presented. The experiments carried out highlight that perceived depth values estimated for virtual prototypes are significantly influenced by the 3D stereoscopic visualization. Another interesting result of the study is that the estimated depth accuracy increases with the depth size that has to be perceived. The results of experimental study illustrate that the use of immersive stereoscopic visualization is useful during Computer Aided Design related activities.