Computer programs produced by Takeshi Nakagawa

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What's new!

10 Feb., 2024: LevelFinder updated (version 7.7.4).
10 Feb., 2024: PolyCounter updated (version 3.2.5).
17 Apr., 2022: LevelFinder updated (version 7.7.3).
17 Apr., 2022: PolyCounter updated (version 3.2.4).
03 Jan., 2020: PolyCounter updated (version 3.2.2).
17 Dec., 2019: PolyCounter updated (version 3.2.1).
05 Dec., 2019: PolyCounter updated (version 3.2.0).
24 Aug., 2019: LevelFinder updated (version 7.7.1).
24 Aug., 2019: PolyCounter updated (version 3.1.9).
09 Jul., 2019: LevelFinder updated (version 7.6.9).
09 Jul., 2019: PeakCounter updated (version 2.2.2).

Introduction

The programs on this page are all spin-offs from Suigetsu Varves 2006 project. They are initially developed for our internal use but also suitable for public use. All programs employ very user-friendly interface and run on Microsoft Windows (XP-SP3 or later) on IBM PC compatibles. (Polygon and PolyCounter have experimental Macintosh versions, too).

Research Tools developed by Takeshi are here.

Important notice for all users!! All programs use .csv as data format. Make sure that your PC uses period (.) as decimal point and comma (,) as separator. Otherwise the programs cannot re-open the files that they saved. You can change the setting at Control Panel -> Regional and Language Options -> Customise -> Numbers.

Getting the programs

The latest versions of the programs can be downloaded from here as zip files. Available are full installer package (recommended for first time users), merely compressed version, and VB6 source code for some programs.

Polygon 2.4.4: installer and compressed versions, program source. Sample data (Package). Version 1.5 user manual (English, Japanese).
A program for pollen-based quantitative climate reconstruction by modern analogues technique. Either taxa percentages or EOF values (weighted by EOF loadings) can be used to find analogues. Polygon 2.0 or later displays distribution of modern analogue sites on base map. The software can also generate error model and calibrate the reconstruction results.

From a user in Beijing, China: "Polygon is really useful and easy to run even for new users. The new function to see the analogue sites on map is really great."

PolyCounter 3.2.5: installer and compressed versions, program source. Sample data (Package).
PolyCounter is a program to make use of your computer as a set of 135 counters. First-time users are strongly recommended to use the installer version so that sound and reference files are properly set up.

From a user in Cape Town, South Africa: "PolyCounter is a very useful programme. Thanks for making it available to everybody. It certainly has changed my research life!"

The most ergonomic (or I would say 'addictive') counting environment can be achieved by combining this software with special keyboard for PolyCounter (jpg). Details and order form of PolyCounter hardware is here.

YouTube video (https://youtu.be/fs_hgkj0IYE)

!!! IMPORTANT NOTICE !!!
PolyCounter 3.1.8-9 and 3.2.0-1 had serious errors. If you are using any of those versions, please update it to the current version 3.2.5 which has been fixed for the problems.

LevelFinder 7.7.4: installer and compressed versions, program source. Sample data (Package). Template to generate correlation matrix for LF.
A program developed as a part of Suigetsu Varves 2006 Project for very precise depth control, sharing the latest age-depth model across the group, plotting analytical results and data comparison with other study sites.
SG06 and SG14 stratigraphyical information package for LevelFinder is available here (Nakagawa et al. 2012; Bronk Ramsey et al. 2012; Staff et al. submitted).
- LevelFinder has been updated from ver.5 to ver.6 as a part of the Suigetsu Varves 2014 project. The new version (nicknamed 'LevelFinder Duo') can synchronise two sets of cores on a seamless platform.

PeakCounter 2.2.2: installer and compressed versions, program source. Sample data (Package). Version 2.1 user manual (English). PeakCounter in PAGES news letter.
A program developed as a part of Suigetsu Varves 2006 Project for varve counting using multi-parameter data and radiograph from the Itrax core scanner. Double-L channel method is recommended as the most suitable subsampling technique for scanning (Double-L channel video).

Notice for French Windows users!! A malfunction of PeakCounter 2.0.0 has been reported fromFrench Windows users. If you are having trouble with PeakCounter 2.0.0 on French Windows, please update it to version 2.1.5 or, alternatively, use older version 1.6.2 (installer and compressed versions, program source).

Polation 1.1: installer and compressed versions. Sample data (Package).
A program to infer climate indices to surface pollen sites by different interpolation methods. It can also check accuracy of the interpolation.

EventWatcher 1.5.4: installer and compressed versions. Sample data (Package).
A program for characterising climatic events by fitting simple models.

All programs are easy to install and simple to use. Outputs can be saved in both text and graphical formats. The programs are not protected by copyright.

Legacy packages

Important notice! PolCalib and PolHist are now integrated into the Polygon package.

PolyCounter 2.7.5: installer and compressed versions, program source.
PolyCounter 3.1.4 for Macintosh (zip): a standalone version of PolyCounter 3.1.4 compiled using Winebottler software (special thanks to Dr. Ryoma Hayashi). N.B. PolyCounter for Mac requires XQuartz software pre-installed on Mac.
- Some Mac users (actually including myself!) successfully run PolyCounter on Mac OS using Windows emulator (such as Parallels). Dr. Benjamin Dietre (https://www.benscoat.eu/about-me) kindly volunteers to assist Mac users of the world to run PolyCounter on Macintosh.
Polygon 2.2.4: installer and compressed versions.
Polygon 2.3.3 for Macintosh (zip): a standalone version of Polygon 2.3.3 compiled using Winebottler software (special thanks to Dr. Ryoma Hayashi). N.B. Polygon for Mac requires XQuartz software pre-installed on Mac.
- Some Mac users (including myself, actually) successfully run Polygon for Win on Mac OS using Windows emulator. Dr. Benjamin Dietre (benjamin.dietre[at]uibk.ac.at - congratulations for his recent success in PhD defense!) kindly volunteers to assist Mac users of the world to run Polygon on Macintosh.
Polygon 1.5: installer and compressed versions.
EventWatcher 1.5.2: installer and compressed versions.
PeakCounter 1.6.2: installer and compressed versions, program source.
PolCalib 3.0: installer and compressed versions.
PolHist 2.5: installer and compressed versions.

References

Nakagawa,T. et al. (2002) Quantitative pollen-based climate reconstruction in central Japan: application to surface and Late Quaternary spectra. Quaternary Science Reviews, 21, 2099-2113, doi:10.1016/S0277-3791(02)00014-8.
Gotanda, K. et al. (2002) Biome classification from Japanese pollen data: application to modern-day and late Quaternary samples. Quaternary Science Reviews, 21, 647-657, doi:10.1016/S0277-3791(01)00046-4.
Nakagawa, T. (2007) PolyCounter ver.1.0 & Ergodex DX-1: a cheap and very ergonomic electronic counter board system. Quanternary International, 167-168 Supplement, 298, doi:j.quaint.2007.04.001.
Nakagawa, T. (2007) Double-L channel: an amazingly non-destructive method of continuous sub-sampling from sediment cores. Quanternary International, 167-168 Supplement, 298, doi:j.quaint.2007.04.001.
Bronk Ramsey et al. (2012) A complete terrestrial radiocarbon record for 11.2 to 52.8 kyr B.P." Science, 338, 370-374, doi: 10.1126/science.1226660.
Nakagawa et al. (2012) SG06, a fully continuous and varved sediment core from Lake Suigetsu, Japan: stratigraphy and potential for improving the radiocarbon calibration model and understanding of late Quaternary climate changes. Quaternary Science Reviews, 36, 164-176, doi:10.10.1016/j.quascirev.2010.12.013.

Last updated: 10 Feb, 2024.