An Isometric Joystick As a Pointing Device for Handheld Information Terminals
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Evaluating the Effect of Four Different Pointing Device Designs on Upper Extremity Posture and Muscle Activity During Mousing Tasks
Applied Ergonomics 47 (2015) 259e264 Contents lists available at ScienceDirect Applied Ergonomics journal homepage: www.elsevier.com/locate/apergo Evaluating the effect of four different pointing device designs on upper extremity posture and muscle activity during mousing tasks * Michael Y.C. Lin a, Justin G. Young b, Jack T. Dennerlein a, c, a Department of Environmental Health, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115, USA b Department of Industrial & Manufacturing Engineering, Kettering University, 1700 University Avenue, Flint, MI 48504, USA c Department of Physical Therapy, Movements, and Rehabilitation Sciences, Bouve College of Health Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA article info abstract Article history: The goal of this study was to evaluate the effect of different types of computer pointing devices and Received 10 January 2014 placements on posture and muscle activity of the hand and arm. A repeated measures laboratory study Accepted 3 October 2014 with 12 adults (6 females, 6 males) was conducted. Participants completed two mouse-intensive tasks Available online while using a conventional mouse, a trackball, a stand-alone touchpad, and a rollermouse. A motion analysis system and an electromyography system monitored right upper extremity postures and muscle Keywords: activity, respectively. The rollermouse condition was associated with a more neutral hand posture (lower Pointing device inter-fingertip spread and greater finger flexion) along with significantly lower forearm extensor muscle Computer tasks fi Musculoskeletal disorders activity. The touchpad and rollermouse, which were centrally located, were associated with signi cantly more neutral shoulder postures, reduced ulnar deviation, and lower forearm extensor muscle activities than other types of pointing devices. -
Track Ball → It Is Pointing Device That Is Used to Control the Positions Of
Department Of Computer Application (BBA) Dr. Rakesh Ranjan BCA Sem - 2 Input devices Track ball it is pointing device that is used to control the positions of the cursor on the screen. It is usually used in notebook computers where it is placed on the keyboard . It is nothing but an upside down mouse where the ball rotates in place within a socket. The user can rolls the ball to position the cursor at the appropriate position on the screen and then clicks one of the buttons near the track ball either to select the objects or to position the cursor. The working of a track ball is identical to mouse Touch pad it is small flat rectangular stationary pointing device with a sensitive surface of 1.5 to 2 inch. The user has to slide his or her figure tips across the surface of the pad to point to specific objects on the object. The surface translate the motion and position of the user’s figures to a relative position on the screen The touch pad are widely used in laptop and other handheld devices . The working of the touchpad is similar to that of mouse or a trackball. The pressure of the finger on the surface leads to a capacitance effect, which is detected by the sensors . the sensors send appropriate signals to cpu which interprets them and display the pointer on the screen . Joy stick it is widely used in computer games and computer aided design and manufacturing (CAD/CAM) applications. It has one or more push buttons called switches . -
Welcome to Computer Basics
Computer Basics Instructor's Guide 1 COMPUTER BASICS To the Instructor Because of time constraints and an understanding that the trainees will probably come to the course with widely varying skills levels, the focus of this component is only on the basics. Hence, the course begins with instruction on computer components and peripheral devices, and restricts further instruction to the three most widely used software areas: the windows operating system, word processing and using the Internet. The course uses lectures, interactive activities, and exercises at the computer to assure accomplishment of stated goals and objectives. Because of the complexity of the computer and the initial fear experienced by so many, instructor dedication and patience are vital to the success of the trainee in this course. It is expected that many of the trainees will begin at “ground zero,” but all should have developed a certain level of proficiency in using the computer, by the end of the course. 2 COMPUTER BASICS Overview Computers have become an essential part of today's workplace. Employees must know computer basics to accomplish their daily tasks. This mini course was developed with the beginner in mind and is designed to provide WTP trainees with basic knowledge of computer hardware, some software applications, basic knowledge of how a computer works, and to give them hands-on experience in its use. The course is designed to “answer such basic questions as what personal computers are and what they can do,” and to assist WTP trainees in mastering the basics. The PC Novice dictionary defines a computer as a machine that accepts input, processes it according to specified rules, and produces output. -
An INTRODUCTION to Preconstruction (Webt)
WELCOME to an INTRODUCTION TO Preconstruction (webT) Welcome to the Preconstruction (webT) User Guide. When development of the Preconstruction application is complete, it will be a self-contained, electronic database application that will deal with everything currently handled by CES, PES, LAS, Designer Interface, Expedite, Bid Express, DSS and Sitemanager. The purpose of this series of documents is to provide a simple and easy explanation dealing with navigating and working in the new web Preconstruction environment. It should answer the “WHO, WHAT, WHEN, WHERE, WHY and HOW” of webT. It is designed to provide easy-to-follow steps to enhance the accomplishment of your tasks whether your job deals with contract administration, project design, estimation, contract awarding or contract management, to mention just a few. The instructions and directions are arranged logically and sequentially. The goal of this User Guide is to reduce the frustration frequently associated with learning a new application. The guide should be a handy reference that is quick and easy. If you find it doesn’t provide enough information, please call the HELP DESK or even reference the “Online Help” available throughout the application The Guide is intended to be a quick reference on how to accomplish certain tasks without a lot of technical jargon. It is not intended to be a technical treatise that defines the coding and programming challenges handled by the application. Part of the beauty of a web application is the ease in which tasks are accomplished without requiring the user to remember special keys or to enter special codes. With the aid of drop-down menus and mouse clicks on buttons or hyperlinks, processes can be activated and run without the user doing anything more complicated than a point and click. -
Evans, Gareth; Blenkhorn, Paul a Head Operated Joystick
DOCUMENT RESUME ED 430 330 EC 307 177 AUTHOR Evans, Gareth; Blenkhorn, Paul TITLE A Head Operated Joystick--Experience with Use. PUB DATE 1999-03-00 NOTE 6p. PUB TYPE Reports Descriptive (141) EDRS PRICE MF01/PC01 Plus Postage. DESCRIPTORS *Accessibility (for Disabled); *Assistive Devices (for Disabled); *Input Output Devices; *Severe Disabilities; Use Studies IDENTIFIERS *Joysticks ABSTRACT This paper describes the development and evaluation of a low-cost head-operated joystick for computer users with disabilities that prevent them from using a conventional hand-operated computer mouse and/or keyboard. The paper focuses on three issues: first, the style of head movement required by the device; second, whether a head-operated device should work as an absolute positioning device or as a joystick; and, third, the accuracy required by the device. It finds that the device's "nose following" style of head movement is more accepted by users than alternatives; that users also preferred the joystick relative pointing device over absolute positioning devices; and that users did not notice inaccuracies inherent in the device's design, thus allowing production at a lower cost. (DB) ******************************************************************************** Reproductions supplied by EDRS are the best that can be made from the original document. ******************************************************************************** PERMISSION TO REPRODUCE AND DISSEMINATE THIS MATERIAL HAS ert BEEN GRANTED BY r1) el") EXPERIENCE WITHUSE ans A HEADOPERATEDJOYSTICK - TO THE EDUCATIONAL RESOURCES INFORMATION CENTER (ERIC) Gareth Evans and PaulBlenkhorn 1 Manchester, UK, [email protected] of Computation, UMIST, Technology for DisabledPeople Unit, Department Introduction computer mouse and/orkeyboard, may use a head- Computer users who cannot use aconventional hand-operated computer and, by using anon-screen keyboard, totype operated mouse or joystickin order to control their user's head movements aretranslated into mouse pointer information. -
Writing with a Joystick: a Comparison of Date Stamp, Selection Keyboard, and Edgewrite Jacob O
Writing with a Joystick: A Comparison of Date Stamp, Selection Keyboard, and EdgeWrite Jacob O. Wobbrock, Brad A. Myers and Htet Htet Aung Human-Computer Interaction Institute School of Computer Science Carnegie Mellon University Pittsburgh, Pennsylvania, USA {jrock, bam, hha}@cs.cmu.edu http://www.cs.cmu.edu/~edgewrite/ Abstract A joystick text entry method for game controllers and mobile phones would be valuable, since these devices often have joysticks but no conventional keyboards. But prevalent joystick text entry methods are slow because they are selection-based. EdgeWrite, a new joystick text entry method, is not based on selection but on gestures from a unistroke alphabet. Our experiment shows that this new method is faster, leaves fewer errors, and is more satisfying than date stamp and selection keyboard (two prevalent Figure 1. The Saitek P2500 Rumble Force Pad. Our experiment selection-based methods) for novices after minimal used the two thumbsticks and one of the silver buttons. practice. For more practiced users, our results show that EdgeWrite is at least 1.5 times faster than selection messenger-style text. With only selection-based text entry keyboard, and 2.4 times faster than date stamp. methods for game controllers, this can be awkward. Keywords: Text entry, text input, joystick, game controller, Mobile devices have also placed high demands on text game console, physical edges, corners, gestures, unistrokes. entry development. Numerous text entry methods have been investigated, including those driven by buttons, character 1 Introduction – Why Joystick Text Entry? recognition, virtual keyboards, thumbwheels, and voice. Joysticks have served as input devices since the earliest Many new handheld devices, such as the Ericsson T68i computers [7]. -
Developed by the Irene Howell Assistive Technology Center, ECU
Developed by the Irene Howell Assistive Technology Center, ECU Inspiration 1. Inspiration is on every machine. Click the Inspiration icon to begin or go to Start, Programs, and then Inspiration. 2. When the program begins, the screen will come up as shown below. Symbol Palette This is the main idea and where Change the you will begin font, size, color, etc. Icons on the tool bar include (From L to R) Outline View o Change view from diagram view to outline format Rapid Fire o Creates symbols linked to from your main idea Create Tool o Adds new symbols to your main Idea. Link o Links from a symbol to a symbol and can add text to a link Arrange o Changes the Diagram view. Note o Allows the user to begin the writing process Hyperlink o Lets you add outside resources. Spell Developed by the Irene Howell Assistive Technology Center, ECU o Spell Check Transfer o Transfers Outlines and Diagrams to the computer word processor. 3. The first thing to explore is how to change and manipulate the symbols. We will begin by manipulating the main idea. a. Double Click on the words “Main Idea”. Change the text to your main idea, the example will be “On the Farm.” (For clarification of steps, please duplicate the example shown.) b. To find a picture that represents your theme, Click on the down arrow on the symbol palette and choose the appropriate category (or you can choose the left and right arrows to scroll through). c. When you found your picture, Click on the main idea bubble ONCE then Click on the picture ONCE. -
Android Based Area Web Monitoring
EPJ Web of Conferences 68, 00002 (2014) DOI: 10.1051/epjconf/20146800002 C Owned by the authors, published by EDP Sciences, 2014 Android Based Area Web Monitoring Bayu Kanigoro, Afan Galih Salman, Jurike V Moniaga, Eric Chandra, and Zein Rezky Chandra Computer Science Program, School of Computer Science, Bina Nusantara University, Indonesia Abstract. The research objective is to develop an application that can be used in the monitoring of an area by using a webcam. It aims to create a sense of security on the user's application because it can monitor an area using mobile phone anywhere. The results obtained in this study is to create an area with a webcam monitoring application that can be accessed anywhere as long as the monitoring results have internet access and can also be accessed through Android Based Mobile Phone. 1 Introduction 2 Recent Works In the era of globalization, developments in information There are some discussions about web monitoring. technology plays an important role in various sectors of Details of the development of a simple webcam joystick, human life and mobile phone is a main actor in this era. a wireless, or rather cable less, and contactless pointing When it was becomes popular around 1990, it was only device by using a webcam and a simple flexible non- be used for voice communication between persons but electronic joystick for recording patient movement has now it has a very sophisticated ability which formerly been described in [1]. could only be done by computers which can be done by An efficient Omni directional surveillance system for mobile phone today which is known by the wider digital home security was proposed in [5]. -
Pointing Devices, Input-Output Mappings, CD Gain, Mid-Air Interaction, Problems of Direct Input and Solutions Input Devices Vs
Input: pointing devices, input-output mappings, CD gain, mid-air interaction, problems of direct input and solutions Input devices vs. Finger-based input Indirect vs. Direct pointing Indirect: The position of the cursor Direct: Fingers manipulate visual is controlled by the device objects directly on the screen Absolute vs. Relative pointing Absolute: 1-to-1 mapping between input and output space indirect direct Relative: Input controls the relative position of the cursor (always indirect) Hovering mode Tracking the position of the pointing device (e.g., the pen) or the finger from distance Hover widgets http://www.youtube.com/watch?v=KRXfaZ8nqZM Absolute pointing Direct input ! Hovering feedback is not indispensable as there is a clear mapping between pen/fingers and the screen ! Main drawback: occlusion problems Indirect input Wacom Cintiq ! « Hovering » is indispensable: users must know the position of the cursor before starting drawing regular graphics tablet Relative pointing Common devices: mouse and touchpad « Clutching » instead of « hovering » mode ! Lift the mouse or finger to « re-calibrate » movement ! Use of smaller input space to traverse a larger output space How would you map the input space of the tablet to the output space of the wall? Smarties: https://www.lri.fr/~chapuis/publications/CHI14-smartiestk.mp4 Buxton’s 3-state model (1990) A. Two-state model for mouse Buxton’s 3-state model (1990) B. Two-state model for a touch tablet Buxton’s 3-state model (1990) C. Three-state model for a gaphics tablet with stylus Relative pointing: Mappings Position control: maps human input to the position of the cursor (or object of interest) Examples: mouse, touchpad Rate (or velocity) control: maps human input to the velocity of the cursor (or object of interest) Examples: joystick, trackpoint Trackpoint Isotonic vs. -
A Computer Vision-Based Pointing and Gesture Input Device
FlowMouse: A Computer Vision-Based Pointing and Gesture Input Device Andrew D. Wilson and Edward Cutrell Microsoft Research One Microsoft Way, Redmond, WA [email protected], [email protected] Abstract. We introduce FlowMouse, a computer vision-based pointing device and gesture input system. FlowMouse uses optical flow techniques to model the motion of the hand and a capacitive touch sensor to enable and disable in- teraction. By using optical flow rather than a more traditional tracking based method, FlowMouse is exceptionally robust, simple in design, and offers op- portunities for fluid gesture-based interaction that go well beyond merely emu- lating pointing devices such as the mouse. We present a Fitts law study exam- ining pointing performance, and discuss applications of the optical flow field for gesture input. 1 Introduction Today’s computing environments are strongly tied to the availability of a high resolu- tion pointing device, and, more fundamentally, to the notion of a single, discrete two- dimensional cursor. Modern GUIs (graphical user interfaces) combined with devices such as mice and track pads are extremely effective at reducing the richness and vari- ety of human communication down to a single point. While the utility of such devices in today’s interfaces cannot be denied, there are opportunities to apply other kinds of sensors to enrich the user experience. For example, video cameras and computer vision techniques may be used to capture many details of human shape and movement [24]. The shape of the hand may be analyzed over time to manipulate an onscreen object in a way analogous to the hand’s manipulation of paper on a desk. -
Design of a Graphical User Inter- Face Decision Support System for a Vegetated Treatment System 1S.R
DESIGN OF A GRAPHICAL USER INTER- FACE DECISION SUPPORT SYSTEM FOR A VEGETATED TREATMENT SYSTEM 1S.R. Burckhard, 2M. Narayanan, 1V.R. Schaefer, 3P.A. Kulakow, and 4B.A. Leven 1Department of Civil and Environmental Engineering, South Dakota State University, Brookings, SD 57007; Phone: (605)688-5316; Fax: (605)688-5878. 2Department of Comput- ing and Information Sciences, Kansas State University, Manhattan, KS 66506; Phone: (785)532-6350; Fax: (785)532-5985. 3Agronomy Department, Kansas State University, Manhattan, KS 66506; Phone: (785)532-7239; Fax: (785)532-6094. 4Great Plains/Rocky Mountain Hazardous Substance Research Center, Kansas State University, Manhattan, KS 66506; Phone: (785)532-0780; Fax: (785)532-5985. ABSTRACT The use of vegetation in remediating contaminated soils and sediments has been researched for a number of years. Positive laboratory results have lead to the use of vegetation at field sites. The design process involved with field sites and the associated decision processes are being developed. As part of this develop- ment, a computer-based graphical user interface decision support system was designed for use by practicing environmental professionals. The steps involved in designing the graphical user interface, incorporation of the contaminant degradation model, and development of the decision support system are presented. Key words: phytoremediation, simulation INTRODUCTION Vegetation has been shown to increase the degradation of petroleum and organic contaminants in contaminated soils. Laboratory experiments have shown promising results which has led to the deployment of vegetation in field trials. The design of field trials is different than the design of a treatment system. In a field trial, the type of vegetation, use of amendments, placement and division of plots, and monitoring requirements are geared toward producing statistically measurable results. -
People with Disabilities and Computer Technology Providing Access to Technology by Sheryl Burgstahler, Ph.D
Working Together: People with Disabilities and Computer Technology Providing access to technology By Sheryl Burgstahler, Ph.D. People with disabilities meet barriers of all that normally require two or more keys to be types. However, technology is helping to lower pressed simultaneously. The key repeat function many of these barriers. By using computing can be disabled for those who cannot release a technology for tasks such as reading and writing key quickly enough to avoid multiple selections. documents, communicating with others, and Key board guards (solid templates with holes over searching for information on the Internet, each key to assist precise selection) can be used by students and employees with disabilities are those with limited fine motor control. capable of handling a wider range of activities independently. Still, people with disabilities face a Sometimes repositioning the keyboard and variety of barriers to computer use. These barriers monitor can enhance accessibility. For example, can be grouped into three functional categories: mounting keyboards perpendicular to tables barriers to providing computer input, interpreting or wheelchair trays at head-height can assist output, and reading supporting documentation. individuals with limited mobility who use Hardware and software tools (known as adaptive pointing devices to press keys. Other simple or assistive technologies) have been developed to hardware modifications can assist individuals provide functional alternatives to these standard with mobility impairments. For instance, disk operations. Specific products, and approaches to guides can assist with inserting and removing using them, are described below. diskettes; a dedicated hard disk or computer network access can eliminate or reduce the necessity to do so.