AMATYC Review Spring 2007 |

Edited by Sandra DeLozier Coleman THE CALCULUS WARS: Newton, Leibniz, and the Greatest Mathematical Clash of All Time, Jason Socrates Bardi, Thunder’s Mouth Press, an imprint of Avalon Publishing Group, Inc., New York, 2006, ISBN 1-56025-706-7. TOM STOPPARD: PLAYS 5—Arcadia, The Real Thing, Night and Day, Indian Ink, Hapgood, Tom Stoppard, Faber and Faber Limited, London, 1999, ISBN 0-571-19751-5. (back to top) Reviewed by Patrick J. DeFazio, Onondaga Community College Edited by Brian E. Smith powerOne™ Graph v4.2 As a qualified educator, administrator or director, you may be eligible to purchase a single copy of powerOne™ Graph graphing-scientific calculator software or powerOne Platforms: Palm PowerOne™ Graph v4.2 by Infinity Softworks, Inc. is a graphing calculator software title for Palm This review outlines the main calculator interface, illustrates the use of a statistics template, and then demonstrates a few of the more commonly needed graphical features. Screen shots were obtained using a PC emulator. It should be noted that the resolution of the images from the emulator do not adequately indicate the resolution obtained when using the software on a Palm The main calculator interface (see Figure 1) has many features that make calculation input and access (to the many additional software features) very easy. Calculations are entered through the use of the keypad and function buttons (on the function bars). These buttons call individual functions (or function categories) and appear in two rows that the user can scroll to see additional available buttons. The buttons can be customized to include templates as well. The list of available function buttons may change with the use of alternate skins (from the website). The user can also select functions through the functions button (located next to the function bars) which opens a menu of function categories (Math, Number, Trig, Prob, Stat, Matrix, Vars, etc). Selecting one of these categories opens a new menu of individual functions. The default input mode is "algebraic” allowing the user to enter the entire calculation in the view window at once. When ENT is selected the calculator returns the final result using the normal order of operations. However, different input modes can be selected (RPN for those accustomed to HP calculators, for example).
Within the view window are some additional features. The H3 in the screen shot in Figure 4 indicates the memory location where the current calculation results are stored. When thebutton within the view window is tapped with the stylus a calculations log opens showing a recent list of calculations and results. These can be individually recalled to the view window for use in the current calculation. The D in the view window pictured in Figure 1 indicates that the calculator is in decimal mode. This can be selected to open a menu that allows the user to change the base for calculations or convert results (to binary, octal, or hexadecimal). Fraction and mixed number modes/conversions are also available here. (See Figures 2–4.) The powerOne button at the top of the main calculator screen provides access to the preference settings. It also contains the copy/paste commands that access the Palm New data (variables, constants, matrices, tables, etc.) can be entered through the"My Data” navigation button at the top of the main calculator screen. User created macros (specific equations for recall in other calculations) can also be entered here. Many useful constants come stored in the "My Data” area including e, , the speed of light, gravity acceleration, electron mass, and others. Tables are easily created by selecting New from the "My Data” screen. The user can name the table, enter its imensions (see Figure 5), and then, using the pop-up keyboard calculator (which automatically appears when needed), input the individual entries, as shown in Figure 6. After completion and returning to the "My Data” screen the table can later be edited, duplicated, beamed, or have notes attached (Figure 7). The ability to attach notes is a nice feature that would be very useful if multiple tables are needed for an assignment or project. Templates are a nice feature of this software. Some templates come pre-installed, others can be created by the user or obtained from Infinity Softworks Inc.’s website. Access to the templates is obtained through the "My Templates” navigation button at the top of the main calculator screen. When this button is selected with the stylus a menu of templates (sorted into categories) is opened. Business, calendar, conversion, and many statistical templates are available here. Some of the statistical choices are shown in Figure 8. The 2-Var Stats template was chosen in Figure 9 to illustrate the process. The two columns of the Sample table are selected from drop down lists as the data source. When OK is tapped by the stylus the template runs and approximately two screens of statistics are shown in Figures 10 and 11. Tapping the button at the top of this screen provides a nice summary of all of the statistics calculated in this template, as indicated in Figure 12. Selecting Graph from this screen shows a plot of the data with an automatically fitted window. From there, Analysis can then be selected with Regression and Quadratic chosen from the subsequent menus to produce a graph of the quadratic regression function (see Figures 13 and 14). Details of the regression function can be found using the button as demonstrated in Figure 15. The function f(x) = sin(x) + 1 will be used to demonstrate a few of the graphical features of the software (graphing, finding extrema, tangent lines, and intersections) that are in common use in a mathematics classroom. Some very nice features of this handheld device software (color, naming, categorizing, notation, and use of stylus) that differentiate it from many popular graphing calculators are also highlighted. Selecting the "My Graphs” navigation button at the top of the main calculator screen brings up the "My Graphs” screen (see figure 16). This is where a list of previously entered graphs is contained. A listing of all graphs can be shown, or just those from selected (user created) categories. Graphs displayed on the list can be selected or deselected through checkboxes. In addition, different colors and line styles may be assigned to different graphs from this location. Window settings for graph viewing can also be set here for an individual graph or an entire category of graphs. The ability to use different colors does allow multiple graphs to be viewed on the same set of axes with greater clarity than on a typical monochromatic calculator screen. Select New with the stylus to create a new graph. Once the type of graph (Function, Parametric, Polar, Sequence, or Data) is selected (Figure 17) the "New Graph” screen is revealed with three tabs (Figure 18). The "Data” tab is the location for entering the function to be graphed. Commonly needed keys and commands are on a keyboard menu. Selecting f(x) brings up a menu of categories of functions (Math, Number, Trig, Prob, etc.) shown in Figure 19. Selecting one of these categories brings up a menu of individual functions (sine, cosine, tangent, etc.), as indicated in Figure 20. The menus are easy and convenient and well suited for quick entries using the Palm The "Details” tab (Figure 21) is the location for assigning the new graph a name (optional) and a category (optional), as indicated in Figure 22. These options could be very useful for an instructor wishing to categorize multiple graphs by different courses or for a student categorizing graphs by assignment. Naming a graph by its homework exercise would also prove a beneficial use of this feature. Graphs without names are listed by their function rule. Color and line styles can also be assigned here. The "Prefs” tab (Figure 21) allows the user to select window settings. One additional (and very nice) feature found on this screen is the Notes option. Selecting Notes from the New Graph screen opens a text input area allowing the user to enter annotations, comments, or questions that can be saved with the graph (see Figure 23). This would be very useful as a pedagogical tool. Now that the graph’s information has been entered, return to the "My Graphs” screen. The drop menu at the upper right-hand corner allows the user to have only the graphs in a desired category to be shown (Figure 24). The desired individual graph(s) are checked, window settings adjusted (if desired) (see Figure 25), and then Graph is selected to view the graph shown in Figure 26. The Palm Select Maximum from the Analysis menu and then use the stylus to drag open a box defining a region for the software to calculate the maximum function value within. The results are displayed on the graph screen (Figure 27). Additional boxed regions can then be defined with the stylus to find additional maximums. Select Tangent from the Analysis menu and then use the stylus to choose a point on the graph (or enter a desired x value). This will display the slope and y-intercept for the line tangent to the graph at the desired point, as shown in Figure 28. Additional points can be selected (and additional tangent lines found) by tapping additional points on the graph with the stylus or entering the desired x values through a pop-up keyboard. The user can also slide the stylus along the graph to see the tangent lines instantly change. Zooming can be controlled by selecting Zoom In (or Zoom Out) and then tapping the desired focal area of the graph with the stylus. Alternatively, the user can select Zoom Box from the Zoom menu and define the box by dragging the stylus over the desired area of the graph. Tracing (evaluating) is accomplished by selecting Trace/Eval from the Analysis menu and then using the stylus to tap the desired point on the graph, as indicated in Figure 29. Again, the stylus can also be slid along the graph to see the function values instantly change. The intersection of two graphs can be found by having both graphs shown on the same axes, selecting Intersection from the Analysis menu, and then using the stylus to drag open a box around the desired point (see Figure 30). This review has illustrated some of the abilities and features of this very functional software title. The main interface and subsequent menus and screens are clear and easily navigated. The Palm Reviewed by Patrick DeFazio, Assistant Professor, Department of Mathematics, Onondaga Community College (Syracuse, NY). DeFazio received his BS (Mathematics) from the State University of New York (SUNY) at Fredonia and both a BA (Philosophy) and MA (Mathematics) from SUNY Brockport. Send reviews to:
Edited by Stephen Plett and Robert Stong New Problems The AX Problem Set consists of four new problems. Set AV Solutions Solutions are given to the four problems from the AV Problem Set that were in the |

Association Management Software Powered by YourMembership :: Legal