I have fs = 132 Hz and fc = 770 Hz  I want to design a first order high pass filter that increases gain at a rate of 20dB per decade from 132 Hz until 770 Hz.  Before 132 Hz the filter must stay around -17dB.  How do I select components to design this filter?   I am aware of the equation to select RC values for some cutoff frequency, but am not sure how to account for the stopband frequency.  Edit 1.  Below is a picture of what I have been able to achieve so far.    Next is a picture of what I need the circuit to do.
I have been given a Bode plot of a low pass filter, and tasked with essentially reversing the effects by using a high pass filter. I have solved for the transfer function which is the first equation, and I am assuming the inverse transfer function will give me the information I need to construct the high pass filter. I know the values for \$z\$ and \$p\$. Is there a method given any transfer function to realise the circuit elements required? $$H(s) = 0.17\frac{s-z}{s-p}$$ $$H(s)^{-1} = 5.88\frac{s-p}{s-z}$$
Selectively coloring text in RichTextBox How can I paint in red every time I meet the letter "A" in RichTextBox? Argument list too long error for rm, cp, mv commands I came across this :     Unbelievable as it may seem, many individuals that fought in the   American Revolution were still alive in 1839, the year the world was introduced to photography. (choose the error - the 'answer' is in bold)   It noted that the reason "that fought" is wrong is that 'The relative pronoun “that” may not be used to refer to people (“individuals”) and should be replaced with the relative pronoun “who.”'   I had thought that the word "that" could refer to both people and objects (while which was reserved for objects and who reserved for people). Am I wrong? I have made a script that will sort files according to their extension and place them in the proper folder. For example, place abc.jpg in the directory jpg.  #!/bin/bash #this script sorts files according to their extensions oldIFS=$IFS IFS=$'\n' (find . -type f) &gt; /tmp/temp for var in `cat /tmp/temp` do name=`basename "$var"` ext=`echo $name | cut -d'.' -f2- | cut -d'.' -f2- | cut -d'.' -f2- | cut -d'.' -f2- | cut -d'.' -f2- | cut -d'.' -f2- | cut -d'.' -f2-` mkdir -p $ext mv "$var" $ext/ 2&gt; /dev/null done IFS=$oldIFS   problem with this script:    it involves use of IFS, it is said to avoid use of IFS, as much as possible it does not sorts file without file extensions  it will sort files like abc.tar.bz in folder named bz, but however such a file should go in tar.bz folder see line 9 of my script; if any file contain more no. of dots(in its name) than no. of cut -d'.' -f2- in the script than if will result in file name taken in extension part. for example, a file named i.am.live.in.india.and.i.study.computer.science.txt will be placed in folder named study.computer.science.txt   you may also suggest any tweaks to make this script more smaller and neat. command to display time (duration) in human readable form I spent 3 hours trying to write a command to format a time (duration) expressed as a floating number (in seconds) in a nice form as follows:  if the time is &lt; 60 write as a float with 3 decimals (i.e. milliseconds)  else let h,m,s be the hours, minutes and seconds corresponding to the time      if h=0 then write as m:ss (ss always with 2 digits, m can have only 1)      else write h:mm:ss (mm and ss with 2 digits, h can have only 1)   So 1.25678 gives 1.256, 125.35 gives 2:05, 18249 (which equals to 5*3600+4*60+9) gives 5:04:09.  I tried several packages for the comparison/formatting. No success. Can someone help me ? Thanks ! Restricing domains for universal and existential quantifiers I am currently using Rosen's "Discrete Mathematics and Its Applications" (7th ed.) for my discrete mathematics course. We recently talked about quantifiers, more specifically the universal and existential quantifier. What confuses me is when we started talking about restricting the domain (i.e. instead of all real numbers, only all real positive numbers), where does the conditional statement come from when restricting the domain of a universal quantifier and where does the conjunction come from when restricting the domain of a existential quantifier?  This link did help:   However, the part that confuses here is how are the domains restricted in the answer given in the link above? Yesterday, I have downloaded and installed Windows 8 Professional, after downloading it (legally) and burning it to a DVD, on my 3-year-old  (Intel Core Duo 2x2.4&nbsp;GHz, 4&nbsp;GB RAM,  hard disk drive).   The installation failed two or three times, each time differently (error codes, for example 0xc000021a, with an infinite boot loop), but finally I completely formatted the hard drive and installed. Seemingly, everything was OK.  However, after booting successfully, the OS is extremely slow. When I open the task manager, it shows that the HDD is at 100% - however, no application or background process or Windows process can be made responsible. I searched the Internet and found that Windows might try to "index" the hard drive, but I did't find a process that isn't also on my second computer, which still uses the Release Preview (restarting every two hours). Also, the startup is empty, and HD Tune and HDD Health show that the drive health is OK, even though I don't know how reliable these two programs are.  I looked for diagnose software from Toshiba, but they only offer tools for "Fujitsu branded Toshiba devices"; I tried it out, and it did not work on my hard drive.  Does this sound like a hard drive failure? The laptop is 3.5-years-old, has been carried around sometimes roughly and was used (and on) most of the time. However, it would have failed exactly the night before installing Windows&nbsp;8 Profesional, which seems - unlikely.  If this is a software error - then what did I do wrong if this occurs from the moment of installation (even the personalization at the end of installation took half an hour)? How can I fix this? How did Kylo Ren travel to the other planet in the TIE fighter? Facebook: Ways to preserve image quality of uploaded images? After uploading an image, Facebook converts it to a new image.  Their conversion process introduces artifacts and mottling to the magenta-ish parts of the image.  Original image:   Facebook's conversion:   Are there ways to preserve the original quality of this image and have the image appearance on Facebook reflect more of the original quality? What are the most important things I need to do to encourage Google Sitelinks? I am still learning settings API so please forgive my noob question. I have three fields: a checkbox, colorpicker and text field (they are working), but I would like to do this: when the theme is installed add "checked" state to my checkbox but allow user to "unchecked" it ,and if empty add default color to my colorpicker... I have no idea how to do this so please help me!  My code looks like this now (thanks to @Chip Bennett! ) :  &lt;?php add_action('admin_menu','create_theme_options_page'); function create_theme_options_page(){ add_options_page('Theme Options','Theme Options','administrator',__FILE__,'build_options_page'); }    function build_options_page(){    ?&gt;    &lt;div id="theme-options-wrap"&gt;    &lt;div style="float:left;margin-top:19px;position:absolute;" class="icon32" id="icon-tools"&gt;&lt;br/&gt;&lt;/div&gt;    &lt;h2&gt;My options page&lt;/h2&gt;    &lt;form method="post" action="options.php"&gt;    &lt;?php settings_fields('plugin_options');?&gt;    &lt;?php do_settings_sections(__FILE__); ?&gt;    &lt;p class="submit"&gt;    &lt;input name="Submit" type="submit" class="button-primary" value="&lt;?php esc_attr_e('Save changes');?&gt;"/&gt;    &lt;/p&gt;    &lt;/form&gt;    &lt;/div&gt;    &lt;?php    }       add_action('admin_init','register_and_build_fields');      function register_and_build_fields(){      register_setting('plugin_options','plugin_options','validate_setting');      add_settings_section('main_section','&lt;br/&gt;&lt;br/&gt;Main Settings','section_cb',__FILE__);      add_settings_field('banner_heading','Banner Heading:','banner_heading_setting',__FILE__,'main_section');      add_settings_field('display_sidebar','Display Sidebar:','display_sidebar_setting',__FILE__,'main_section');      add_settings_field('display_colorpicker','Display Colorpicker:','display_colorpicker_setting',__FILE__,'main_section');      }        //Install Iris colorpicker        add_action( 'admin_enqueue_scripts', 'mw_enqueue_color_picker' );        function mw_enqueue_color_picker( $hook_suffix ) {        // first check that $hook_suffix is appropriate for your admin page        wp_enqueue_style( 'wp-color-picker' );        wp_enqueue_script( 'my-script-handle', get_template_directory_uri() . '/js/my-script.js', array( 'wp-color-picker' ), false, true );        }           //Colorpicker          //Now how to add a default color on theme install?          function display_colorpicker_setting(){          $options = get_option('plugin_options');          echo"&lt;input type='text' id='color1' name='plugin_options[display_colorpicker]' value='{$options['display_colorpicker']}'/&gt;";          }            //Sidebar checkbox           //Now how to add a default state "checked" on theme install?           function display_sidebar_setting(){           $options = get_option('plugin_options');           echo "&lt;input type='checkbox' name='plugin_options[display_sidebar]' {$options['display_sidebar']} id='display_sidebar' /&gt;";           }              //Banner Heading             function banner_heading_setting(){             $options = get_option('plugin_options');             echo "&lt;input name='plugin_options[banner_heading]' type='text' value='{$options['banner_heading']}'/&gt;";             }               //Validate our settings here               function validate_setting($plugin_options){                  return $plugin_options;               }                 function section_cb(){                } ?&gt; Boarding a train in India at another station I have booked a ticket on a train from Mumbai to Chennai and boarding at Pune. Since my schedules have changed, I will be in Mumbai on that day. Can I board the same train in Mumbai in my own ticket and claim the seat/berth? I always see commands like this  apt-get -y install    What is the -y tag for and what is the difference between apt-get install with and without the -y tag? Will my Chinese visa still be valid if I renew my passport? Will my Chinese visa still be valid if I renew my passport? If so how does that work?  I have heard that you can travel with your new passport and just show the old passport with the valid visa when entering China. Has anyone done that? Recently?   I have also been told that you have to get a new visa, which seems somewhat logical but frustrating, especially when my Chinese visa is only a few months old.  My Chinese visa was issued in late Nov 2014 and I heard the rules changed between the US and China. My visa says it's good for 10 years and my US passport expires in 5. How can you profile a Python script? How do I install Java, including in my browser, so websites with Java work? "Show," "shown," and "showed" Evaluating logistic regression and interpretation of Hosmer-Lemeshow Goodness of Fit As we all know, there are 2 methods to evaluate the logistic regression model and they are testing very different things  Predictive power: Get a statistic that measures how well you can predict the dependent variable based on the independent variables. The well-known Pseudo R^2 are McFadden (1974) and Cox and Snell (1989).  Goodness-of-fit statistics The test is telling whether you could do even better by making the model more complicated, which is actually testing whether there are any non-linearities or interactions that you have missed.   I implemented both tests on my model, which added quadratic and interaction already:     &gt;summary(spec_q2)      Call:     glm(formula = result ~ Top + Right + Left + Bottom + I(Top^2) +       I(Left^2) + I(Bottom^2) + Top:Right + Top:Bottom + Right:Left,       family = binomial())       Coefficients:                  Estimate Std. Error z value Pr(&gt;|z|)         (Intercept)  0.955431   8.838584   0.108   0.9139         Top          0.311891   0.189793   1.643   0.1003         Right       -1.015460   0.502736  -2.020   0.0434 *       Left        -0.962143   0.431534  -2.230   0.0258 *       Bottom       0.198631   0.157242   1.263   0.2065         I(Top^2)    -0.003213   0.002114  -1.520   0.1285         I(Left^2)   -0.054258   0.008768  -6.188 6.09e-10 ***     I(Bottom^2)  0.003725   0.001782   2.091   0.0366 *       Top:Right    0.012290   0.007540   1.630   0.1031         Top:Bottom   0.004536   0.002880   1.575   0.1153         Right:Left  -0.044283   0.015983  -2.771   0.0056 **      ---     Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1     (Dispersion parameter for binomial family taken to be 1)     Null deviance: 3350.3  on 2799  degrees of freedom     Residual deviance: 1984.6  on 2789  degrees of freedom     AIC: 2006.6  and the predicted power is as below, the MaFadden is 0.4004, and the value between 0.2~0.4 should be taken to present very good fit of the model(Louviere et al (2000), Domenich and McFadden (1975))                                                :  &gt; PseudoR2(spec_q2)     McFadden     Adj.McFadden        Cox.Snell       Nagelkerke McKelvey.Zavoina           Effron            Count        Adj.Count     0.4076315        0.4004680        0.3859918        0.5531859        0.6144487        0.4616466        0.8489286        0.4712500           AIC    Corrected.AIC  2006.6179010     2006.7125925   and the goodness-of-fit statistics:  &gt; hoslem.test(result,phat,g=8)       Hosmer and Lemeshow goodness of fit (GOF) test    data:  result, phat   X-squared = 2800, df = 6, p-value &lt; 2.2e-16  As my understanding, GOF is actually testing the following null and alternative hypothesis:   H0: The models does not need interaction and non-linearity   H1: The models needs interaction and non-linearity  Since my models added interaction, non-linearity already and the p-value shows H0 should be rejected, so I came to the conclusion that my model needs interaction, non-linearity indeed. Hope my interpretation is correct and thanks for any advise in advance, thanks. Some faces of a model don't respond to UV Mapping I can't seem to get these particular faces to take the UV Mapping. I selected the entire object, entered edit mode, hit U>Unwrap.   The rest of the mesh takes the uv wrapping, but not those faces for some reason.    It looks normal in solid mode.     Does anyone know what could be causing this? Differences between derivatives and strong derivatives Definition: Let $f$ be a real valued function. We say $f$ is $\mathbf{strongly}$ $\mathbf{differentiable}$ at $x = a$ if the following limits exists and is finite:  $$ \lim_{x \to a, y \to a, x \neq y} \frac{ f(x)-f(y)}{x-y} = f^*(a) $$  and we can $f^*(a)$ the strong derivative of $f$ at $a$. Why is this definition of derivative different than the usual one? What is the main crucial point to understand here that makes it different?