https://www.web2pdfconvert.com/ Search terms: calibrate esp32 adc https://github.com/G6EJD/ESP32-ADC-Accuracy-Improvement-function/blob/master/ESP32_Read_Voltage_Simple.ino Timer interrupt //openlabpro.com/guide/timer-on-esp32/ 1. esptool.py –chip esp32 –port COM9 erase_flash 2. esptool.py –chip esp32 –port COM9 –baud 921600 –before default_reset –after no_reset write_flash -z –flash_mode dio –flash_freq 40m –flash_size detect 0x1000 bootloader.bin 0xf000 … Đọc tiếp →

Nếu các bạn may mắn được lên chức chủ nhà ở vùng ngoại ô thành phố, không sớm thì muộn, lâu lâu sẽ không may nhận được thư than phiền của hiệp hội chủ nhà khu chúng ta đang cư … Đọc tiếp →

jsxgraph is a cross-platform, cross-browser javascript library that can generate general-purpose 2D graphics. The following custom pie chart uses standard jsxgraph functions (sector, line, point, text) to replace the provided standard pie chart to show the top ten countries using … Đọc tiếp →

The 1-gigabit network of fiber optics from AT&T which connects the local server “kimberly” (local IP .85) to the Internet (Wan IP, .167) is verified that it can sustain both download and upload at speed exceeding 960 Mbps on several … Đọc tiếp →

In 2015, the South Korean manufacturer giant Samsung produced the Odroid-XU4, a low-powered-credit-card-size single board computer. It can run modern open-source operating systems such as Linux and Android. The standard hardware packs an octa-core Heterogeneous Multi-Processing ARM-based CPU, 2GB of … Đọc tiếp →

1. Standard number line and annotations. 2. Function graph. 3. Periodic functions. 4. Inequalities and interval notations. 5. Grids in log scale. 6. Mathjax symbols. 7. Polar vs Cartesian coordinates. 8. Perspective, orthogonal, spherical projection. 9. Conic sections. 10. Contours. … Đọc tiếp →

1. Each term of a certain sequence is greater than the term before it. The difference between any two consecutive terms in the sequence is always the same number. If the fourth and sixth terms of the sequence are 61 … Đọc tiếp →

http://meta.math.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference http://www.suluclac.com/Wiki+MathJax+Syntax For inline formulas, enclose the formula in $…$. For displayed formulas, use $$…$$. These render differently: ∑ni=0i2=(n2+n)(2n+1)6 (inline) or ∑i=0ni2=(n2+n)(2n+1)6(displayed) For Greek letters, use \alpha, \beta, …, \omega: α,β,…ω. For uppercase, use \Gamma, \Delta, …, \Omega: Γ,Δ,…,Ω. For … Đọc tiếp →

The following steps are required to install a new version of WordPress on Samsung Odroid XU3/4 platform. 1. Install Apache httpd, php, Maria DB, and required support packages (via yum install httpd, mysql, mysql-server, mysql-devel, php-mysql). 2. Untar the new … Đọc tiếp →

Note 4. Linear inequality relationship (with shaded regions). 1. jsxgraph has limited ability to display the solution set of a linear inequality (less than or equal to). The area drawn will be the area below this line. With the attribute … Đọc tiếp →

Note 3. Periodic function such as $f(x)=sin(x)$ has a period of $2π$, since the complete circle is $2π$ radians. The display ticks and grids in this case needs to be multiple of π. This is almost required for most trigonometric … Đọc tiếp →

Note 5. The first graph displays grids as semi-log (the tick marks on y-axis are positioned in log scale while the x-axis has the linear scale). 1. Log base-10 is used so that log(10) is 1. Javascript math function supports … Đọc tiếp →

Note 2. The following customizations are needed to draw standard Cartesian x-y plots. 1. Create the Cartesian vertical and horizontal axis with custom tick marks and labels. The x-axis label is drawn at specified location below the axis. The y-axis … Đọc tiếp →

According to its developer, the University of Bayreuth, Germany, JSXGraph is a cross-browser library for interactive geometry, function plotting, charting, and data visualization in a web browser. This software is implemented completely in JavaScript, and does not rely on any … Đọc tiếp →

The Python computer algebra package Sage and its built-in Matplolib are useful shortcuts to the development of integrated solution to teaching and grading numerous calculus exercises and concepts. This article summarizes major differences of plotting via Sage graphics vs. using … Đọc tiếp →

Dec. 9, 2014, Sage useful commands to make homework keys in Algebra & Calculus. 1. To save the definitions of all functions and variables including history of input and output commands: %colors NoColor save_session() or save_session(‘2014.12.07’) The saved session can … Đọc tiếp →

The server platform that supports dvd-replica.com, dientoan.us, todaynopain.com, and homeschoolclass.info was upgraded to a dual Intel Xeon L5420 quad-core (total 8 cores) dedicated server with 20TB transfer limit, running Fedora Core 20 64-bit version as of 09/2014. The following platform … Đọc tiếp →

July 18, 2014, Grade 5-6 Algebra Mixed Review 4. The following example shows how to simplify an algebraic expression step by step using correct order of operations in algebra. Order of operations: 1. Parentheses. Simplify all operations within a pair … Đọc tiếp →

The following test verifies the required coding to display fractions in standard text book mathematical notation. 1. Use CSS positioning (absolute, relative) to control placement of page elements based upon US Letter size. The selected pages can then be printed … Đọc tiếp →

Test 2. The quadratic equation \(f(x) = ax^2 + bx + c\) represents a parabola in the Cartesian coordinate system. Each point on the parabola has the same distance to the focus and directrix. 1. Draw the focus as a … Đọc tiếp →

Test 1. Linear equation \(f(x)=ax+b.\) 1.1. Override attributes defined in jsxgraph.css. 1.2. Bounding box sets up quickly relative position of axis, grid unit, axis tick marks, and graph boundaries depending on the size of window (autoscale). This setup replaces originX, … Đọc tiếp →

The following open source tools are used to develop the homeschool elementary and highschool level math teaching and benchmark package. 1. Mathematical package in Javascript: jsxgraph.css, jsxgraphcore.js. Note that the .css does not have to be specified in the header.php … Đọc tiếp →

A new Linux server is available to support laptop operation starting on 2/24/2014. These are the necessary steps to set up the server. 1. Install Fedora Core 11 (disc 942) since the hardware platform is not suitable for cpu-intensive tasks … Đọc tiếp →

Notes on using Adobe Premiere vs open-source ffmpeg If you do video editing and post production work, we will run into the ubiquitous Adobe Premiere one way or another. In a Linux-based client server environment, using Premiere exclusively from your … Đọc tiếp →

Sai lầm nguy hiểm trong mùa cúm. Đây là lúc mùa cúm đến một lần nữa trong năm. Mùa cúm xuất hiện, đánh dấu bằng các chiến dịch y tế công cộng đồng và nhắc nhở chúng ta đi chủng … Đọc tiếp →

Bán hào gian lận: Bí mật nhỏ bẩn thỉu của công nghiệp nhà hàng. “Chuyện gì đây?” Tôi rỉ tai thì thầm cùng người bạn đồng hành ăn uống, nhìn chằm chặp vào đĩa đồ ăn phủ đá cục sáng … Đọc tiếp →

1. Choose one or more of the following test standards for grade 3-8 2. Download from the following resources 2.1. CST released tests. The state standard can be obtained from the first few pages of the released tests. The tests … Đọc tiếp →

Choose one or more of the following test standards for grade K-8 1. Common Core State Standards (21.k12.wa.us/CCSSI_MathStandards) Use standard=”0″ in category to add new categories in the database. 2. Verify the updated categories. select Category,Title from state_standards group by … Đọc tiếp →

1. Choose one or more of the following test standards for grade 3-8. 2. The original specifications are stored at study.guide.test.resources/01.Texas/AssessCurr-MathG03. Download from the following resources 2.1. TAKS released tests. 2.2. STAAR Resources include state standards for grade 3-8 and … Đọc tiếp →

Cách nhận diện thực phẩm bị đổi gen. [WMVPlayer video=”/video/02.GMO.Foods.Grocery.flv” image=”/video/02.GMO.Foods.Grocery.jpg” width=640 height=384 autostart=0 repeat=1 /]

Để ý tránh độc tố trong các thực phẩm có chứa bột mì đã bị tẩy trắng.

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Ghi chú những thay đổi trong chủ đề classroom-simplified

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Short notes on important aspects of MYSQL database.

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Bài sau đây hướng dẫn cách thiết lập, chỉnh sửa, và cập nhật hóa nội dung các bài viết trước khi đăng (xuất bản). Chọn Posts (bài đăng), chọn tiểu mục Posts để thấy danh sách và tên các bài đã có sẵn. Đọc tiếp →

Tóm tắt: Bài sau đây hướng dẫn cách thiết lập sự hiện diện của bạn trên mạng Internet dùng kỹ thuật CMS (open source Contents Management System, hệ thống quản lý nội dung nguồn mở) phổ biến WordPress (báo chí … Đọc tiếp →