Changhyun Kwon | Main / RecentChanges http://www.chkwon.net/rss Main.RecentChanges Sun, 20 May 2012 03:56:33 GMT QR http://www.chkwon.net/Main/QR Changhyun (Chang) Kwon

Assistant Professor
Department of Industrial & Systems Engineering
University at Buffalo, SUNY
400 Bell Hall, Buffalo, NY 14260, USA

E-mail: chkwon@buffalo.edu

Web: http://www.chkwon.net

Office Phone: +1-716-645-4705

If you leave a voice message to the above number, Dr. Kwon will receive an email and may check it within an hour or so.

]]>chang 2012-05-20T03:56:33Z Sun, 20 May 2012 03:56:33 GMT chang Links http://www.chkwon.net/Main/Links University at Buffalo

Friends & Colleagues

Other Useful Websites

Sports Teams Around Buffalo, NY

Car Care

Boulder Health Information

Health Information

]]>chang 2012-05-20T03:50:47Z Sun, 20 May 2012 03:50:47 GMT chang Journals http://www.chkwon.net/Main/Journals Journals of Interest

Non-academic Journals/Magazines

Computational Sciences

Mathematics of Operations Research

Operations Research & Management Sciences

Transportation and Logistics

Others

'*'=SCI, '*+'=SCIE, '%'=SSCI

Other Links

]]>chang 2012-05-09T16:52:13Z Wed, 09 May 2012 16:52:13 GMT chang Places http://www.chkwon.net/Main/Places

Table of Contents (hide)

  1. 1. Musuem / Art Gallery
  2. 2. National Parks / State Parks
  3. 3. Campgrounds
  4. 4. Zoo / Aquarium / Botanical Garden
  5. 5. Children's Museum
  6. 6. University
  7. 7. Airports - Destinations and Transfers

1.  Musuem / Art Gallery

2.  National Parks / State Parks

3.  Campgrounds

4.  Zoo / Aquarium / Botanical Garden

5.  Children's Museum

6.  University

7.  Airports - Destinations and Transfers

]]>chang 2012-04-03T17:05:13Z Tue, 03 Apr 2012 17:05:13 GMT chang TwoBodyProblem http://www.chkwon.net/Main/TwoBodyProblem Two-Body Problem or Dual-Career Problem

Forum

Advices and Stories

Resources

Policy

]]>chang 2012-03-17T16:52:05Z Sat, 17 Mar 2012 16:52:05 GMT chang Guides http://www.chkwon.net/Main/Guides This is a list of survival guides for graduate students and researchers. Some links may not work, then you should search the Internet by the title and the author, and send me an email for correction.

Table of Contents (hide)

  1. 1. Graduate School Guide
    1. 1.1 Before you go to a graduate school
    2. 1.2 General Graduate School Survival Guide
    3. 1.3 Presentation Guide
    4. 1.4 Scientific/Mathematical Writing Guide
    5. 1.5 Teaching
    6. 1.6 Others
  2. 2. Academic Job Search
    1. 2.1 Writing Research Statement
  3. 3. Research Grants
    1. 3.1 Writing Proposals
    2. 3.2 Funding Opportunities

7.1  Graduate School Guide

Before you go to a graduate school

I strongly recommend the one below for all graduate students, even if you are already admitted and studying in a graduate program!! I find Section 2 is very meaningful.

General Graduate School Survival Guide

Presentation Guide

Scientific/Mathematical Writing Guide

Teaching

Others

7.2  Academic Job Search

Writing Research Statement

Career

7.3  Research Grants

Writing Proposals

Funding Opportunities

]]>chang 2012-03-17T16:06:33Z Sat, 17 Mar 2012 16:06:33 GMT chang MATLAB http://www.chkwon.net/Main/MATLAB

Table of Contents (hide)

  1. 1. Some Readings
  2. 2. MATLAB Central File Exchange
  3. 3. Recipes
    1. 3.1 Some useful expressions
    2. 3.2 How to control the number of markers in figure?

7.4  Some Readings

7.5  MATLAB Central File Exchange

7.6  Recipes

Some useful expressions

  • Custom function
x = fminunc(@(x) myfun(x,a),x0);
  myfun = @(x) x+2+a;
  • 2D plotting of 3D data
plot([1:10], squeeze(r(1,1,:)));
  • Repeat matrix
repmat(A, [1,1,N]);
  • Setting font sizes in plots
set(0,'DefaultAxesFontSize',14)

How to control the number of markers in figure?

When the size of data is large, using markers in plot is a pain. MATLAB simply puts all the data points with markers, so the plot looks very ugly. I found that drawing three times for a data series looks stupid, but definitely works. Please see the following codes as an example:

num_data = 200;
num_marker = 10;
marker_space = num_data / num_marker;

% x data
x = linspace(0,2,num_data);

% y data
y1 = exp(x);
y2 = 5-exp(-x);

% make font size big
set(0,'DefaultAxesFontSize',14)

% draw a figure
fig1 = figure;
hold on; grid on;

% (1) these two for legend
plot1 = plot(x(1),y1(1), 'ko-','LineWidth',2);
plot2 = plot(x(1),y2(1), 'b*--','LineWidth',2);

% (2) these two for markers
plot(x(1:marker_space:num_data), y1(1:marker_space:num_data), 'ko','LineWidth',2);
plot(x(1:marker_space:num_data), y2(1:marker_space:num_data), 'b*','LineWidth',2);

% (3) these two for lines
plot(x,y1,'k','LineWidth',2);
plot(x,y2,'b--','LineWidth',2);

legend('y_1','y_2','Location','Best');
xlabel('Name of x data \gamma ');
ylabel('Name of y data');

% save the figure as a 600-dpi PDF file
save2pdf('figure_filename',fig1,600);

To save the figure as a PDF file, I recommend save2pdf. The result is:

]]>chang 2012-02-13T18:43:59Z Mon, 13 Feb 2012 18:43:59 GMT chang LaTeX http://www.chkwon.net/Main/LaTeX

Table of Contents (hide)

  1. 1. How to start LaTeX (Windows)
  2. 2. Sample Tasks to Complete for Beginners
  3. 3. Readings
    1. 3.1 TeX books
  4. 4. Links
  5. 5. Useful Tools
    1. 5.1 Graphics
  6. 6. Topics
    1. 6.1 Citation and Bibliography
    2. 6.2 Merge
    3. 6.3 Beamer
    4. 6.4 Fonts
    5. 6.5 TeXLive + ko.tex
    6. 6.6 SumatraPDF + TeXmaker inverse search setup
    7. 6.7 How to use TeX in GMail and any other website with Firefox
    8. 6.8 Installing a Spell Checker for TeXworks
    9. 6.9 CV Templates
    10. 6.10 Grammar Check

7.7  How to start LaTeX (Windows)

I use TeX Live and TeXworks. However, for beginning users, MikTeX and WinEdt might be easier.

  1. Download and install MikTeX. (MikTeX is free.)
  2. Download and install WinEdt. (WinEdt is a shareware.)
  3. Read this document. (This is available for many languages; English, Korean, and so on.)
  4. Start it.

7.8  Sample Tasks to Complete for Beginners

After reading the this document, you may try to complete the following tasks:

  1. Produce a final PDF file using 'pdflatex', not 'latex'.
  2. Include a PDF image file (not JPG, GIF, PNG, EPS, etc) to the document.
  3. Write a table.
  4. Learn how to manage .bib files. I recommend JabRef.
  5. Using .bib and 'bibtex', cite a reference and create a final PDF file that includes a bibliography.

There are several ways to create a final PDF file and include images. I just prefer 'pdflatex' and PDF image formats to other methods and formats.

7.9  Readings

TeX books

7.10  Links

7.11  Useful Tools

  • JabRef- Java GUI for managing BibTeX and other bibliographies
  • Excel To LaTeX Conversion -- You can create LaTeX codes for tables from an Excel spreadsheet directly.
  • Detexify -- Drawing a symbol will give you the LaTeX code for it.
  • SumatraPDF for TeX users -- This lightweight PDF viewer allows updating the document without closing/reloading, and allows inverse search.
  • HeVeA - A good HTML translator for LaTeX.
  • TeX4ht - The best HTML translator for LaTeX that I know of. The HTML version of my CV is created by the htlatex command of TeX4ht.

Graphics

  • VectorMagic - Vectorize your image
  • LaTeXPiX
  • Inkscape - This is an open source alternative to Adobe Illustrator. Inkscape can export drawings as LaTeX codes (save as PDF).
    • textext - An Inkscape extension to enter LaTeX equations in Inkscape
  • ImageMagick - command-line based image manipulation tool; especially useful for converting image formats
mogrify -format jpg *.png
convert filename.jpg filename.png

7.12  Topics

Citation and Bibliography

Merge

  • LINK {ko} - PDFMerge
  • LINK {ko} - combine package

Beamer

Beamer is to generate presentation slides.

Fonts

\usepackage[T1]{fontenc}
\usepackage[scaled]{uarial}
\renewcommand*\familydefault{\sfdefault}
  • Times Roman
\usepackage{mathptmx}
  • Palatino
\usepackage{mathpazo}
  • Helvetica
\usepackage[T1]{fontenc}
\usepackage[scaled]{helvet}
\renewcommand*\familydefault{\sfdefault}

TeXLive + ko.tex

ko.TeX is a Korean typesetting package.

  • This is for Windows distribution.
:: To add ko.tex to your TeXLive installation:
tlmgr --location=http://ftp.ktug.or.kr/KTUG/texlive/2011 install collection-kotex

:: To update the TeX tree:
mktexlsr

:: To update some font maps:
updmap-sys --enable Map=xxxx.map

SumatraPDF + TeXmaker inverse search setup

At the command line, enter (Windows):

"C:\Program Files\SumatraPDF\SumatraPDF.exe" -inverse-search "C:\Program Files\Texmaker\texmaker.exe '%f' -line %l"

Change the paths appropriately.

Or, use SumatraPDF for TeX users and change the option:

C:\Program Files\Texmaker\texmaker.exe "%f" -line %l

However, TeXworks has a nice PDF viewer with a built-in inverse search functionality. TeXworks is probably already installed with your TeX distribution.

How to use TeX in GMail and any other website with Firefox

If you use Firefox, you can use send emails with TeX-rendered equation images.

Installing a Spell Checker for TeXworks

  1. Go here and obtain appropriate dictionary files. For example, US English.
  2. Follow this direction to install the obtained dictionary files.
    • For Windows 7 place .dic and .aff files in the following directory:
:: TeXLive
C:\Users\<user name>\.texlive2011\texmf-config\texworks\dictionaries

:: MikTeX
C:\Users\<user name>\AppData\Local\MiKTeX\<MiKTeX version>\TeXworks\<TeXworks version>\dictionaries

Then, restart TeXworks and select the installed dictionary in Edit > Spelling menu.

CV Templates

Grammar Check

One missing functionality in LaTeX is a grammar checker, while Microsoft Word has the best grammar checker. To use MS Word's grammar checker, I do as follows:

  1. After all writing is done, convert .tex to .html using the htlatex command of TeX4ht.
  2. Open the html file in a web browser and copy all contents to the clipboard.
  3. Open MS Word and paste to a blank document.
  4. Check grammar.
]]>chang 2012-01-30T03:26:30Z Mon, 30 Jan 2012 03:26:30 GMT chang MyName http://www.chkwon.net/Main/MyName My name is 권창현 in Korean. Its break-down is as follows:

LanguageFamily NameGiven Name
EnglishKwonChanghyun
Korean권창현
Hanja權昶賢
]]>chang 2012-01-29T02:46:37Z Sun, 29 Jan 2012 02:46:37 GMT chang Teaching http://www.chkwon.net/Main/Teaching University at Buffalo

Current students are required to access UBlearns.

  • IE 320 Engineering Economy (Spring 2012)

Applied concepts of economic decision making, including present worth analysis, cash flow equivalence, replacement analysis, equipment selection. Open to students in any discipline. [Sample Syllabus (subject to change)]

  • IE 326 Planning for Production and Service Enterprises (Fall 2008, 2009, 2010, 2011)

Examines principles central to the planning of a production process. Topics include forecasting, location analysis, inventory management, supply chain management, push and pull systems, shop scheduling and lean manufacturing. [Sample Syllabus (subject to change)]

  • IE 459/514 Revenue Management (Spring 2009, 2010, 2011)

Revenue Management (RM), or Yield Management, is a set of operational tools for generating more revenue with resource allocations and/or dynamic pricing. In this course, we will cover the fundamental concepts of RM, with mathematical models and algorithms, including capacity control, network capacity control, overbooking, dynamic pricing, customer choice modeling, pricing under competition, estimation and forecasting. By the end of this course, students will be able to understand the basic principles of RM, build mathematical models and suggest proper computational solution methods. [Sample Syllabus (subject to change)]

  • IE 671 Nonlinear Programming (Fall 2009, 2011)

Introduces single and multivariate classical optimization and Kuhn-Tucker theory. Computational methods, including penalty function, barrier function, gradient, are discussed. [Sample Syllabus (subject to change)]

  • IE 677 Network Optimization (Fall 2010)

Introduces solutions to graph theory and optimization problems on directed and undirected graphs. Network flow, transportation, assignment, maximum flow, shortest path, and minimum spanning tree problems are discussed. Some nonlinear network problems including traffic assignment are also discussed. [Sample Syllabus (subject to change)]

]]>chang 2012-01-19T18:18:26Z Thu, 19 Jan 2012 18:18:26 GMT chang