You do not have permission to edit this page, for the following reasons:

This IP address has been blocked from editing Wikipedia.
This does not affect your ability to read Wikipedia pages.
Most people who see this message have done nothing wrong. Some kinds of blocks restrict editing from specific service providers or telecom companies in response to recent abuse or vandalism, and can sometimes affect other users who are unrelated to that abuse. Review the information below for assistance if you do not believe that you have done anything wrong.

The IP address or range 3.85.0.0/16 has been blocked (disabled) by ‪ST47‬ for the following reason(s):

The IP address that you are currently using has been blocked because it is believed to be a web host provider. To prevent abuse, web hosts may be blocked from editing Wikipedia.
You will not be able to edit Wikipedia using a web host provider because it hides your IP address, much like a proxy or VPN.
We recommend that you attempt to use another connection to edit. For example, if you use a proxy or VPN to connect to the internet, turn it off when editing Wikipedia. If you edit using a mobile connection, try using a Wi-Fi connection, and vice versa. If you are using a corporate internet connection, switch to a different Wi-Fi network. If you have a Wikipedia account, please log in.
If you do not have any other way to edit Wikipedia, you will need to request an IP block exemption.

How to appeal if you are confident that your connection does not use a web host's IP address:
If you are confident that you are not using a web host, you may appeal this block by adding the following text on your talk page: ((unblock|reason=Caught by a web host block but this host or IP is not a web host. My IP address is _______. Place any further information here. ~~~~)). You must fill in the blank with your IP address for this block to be investigated. Your IP address can be determined here. Alternatively, if you wish to keep your IP address private you can use the unblock ticket request system. There are several reasons you might be editing using the IP address of a web host (such as if you are using VPN software or a business network); please use this method of appeal only if you think your IP address is in fact not a web host.

Administrators: The IP block exemption user right should only be applied to allow users to edit using web host in exceptional circumstances, and they should usually be directed to the functionaries team via email. If you intend to give the IPBE user right, a CheckUser needs to take a look at the account. This can be requested most easily at SPI Quick Checkuser Requests. Unblocking an IP or IP range with this template is highly discouraged without at least contacting the blocking administrator.

This block will expire on 21:48, 22 February 2026.

Even when blocked, you will usually still be able to edit your user talk page, as well as email administrators and other editors.

For information on how to proceed, please read the FAQ for blocked users and the guideline on block appeals. The guide to appealing blocks may also be helpful.

Other useful links: Blocking policy · Help:I have been blocked
This IP address range has been globally blocked.
This does not affect your ability to read Wikipedia pages.
Most people who see this message have done nothing wrong. Some kinds of blocks restrict editing from specific service providers or telecom companies in response to recent abuse or vandalism, and can sometimes affect other users who are unrelated to that abuse. Review the information below for assistance if you do not believe that you have done anything wrong.

This block affects editing on all Wikimedia wikis.
The IP address or range 3.85.0.0/16 has been globally blocked (disabled) by ‪Jon Kolbert‬ for the following reason(s):

Open proxy/Webhost: See the help page if you are affected

This block will expire on 05:35, 21 February 2029.

Even while globally blocked, you will usually still be able to edit pages on Meta-Wiki.

This block may be appealed at Global steward requests on Meta-Wiki.

Other useful links: Global blocks · Help:I have been blocked

You can view and copy the source of this page:

'''Henryk A. Witek''' is a chemist of Polish origin, and is a [[Professor of Chemistry]] in the [[National Chiao Tung University]], [[Hsinchu, Taiwan]].<ref>((cite web|title=Entry on the department's website |url=http://www.ac.nctu.edu.tw/people/bio.php?PID=44 |access-date=2013-11-28 |archive-url=https://web.archive.org/web/20131203003943/http://www.ac.nctu.edu.tw/people/bio.php?PID=44 |archive-date=2013-12-03 |url-status=dead ))</ref> He obtained his scientific degrees from the [[Jagiellonian University]] (MS) and the [[University of Tokyo]] (PhD). His research interests encompass [[quantum chemistry|quantum]] and [[physical chemistry|physical]] [[chemistry]], applied [[linear algebra]], as well as [[perturbation theory]].

==Achievements==
Using [[Computational chemistry|computational methods]], he carried out simulations of infrared spectra of [[Criegee biradical|Criegee intermediates]] (CH2OO).<ref>((cite journal|title=Infrared Absorption Spectrum of the Simplest Criegee Intermediate CH2OO|volume=340|issue=6129|pages=174–176|url=https://www.science.org/doi/full/10.1126/science.1234369|journal=[[Science (magazine)|Science]]|access-date=2013-11-28|doi=10.1126/science.1234369|pmid=23580523|year=2013|last1=Su|first1=Y.-T.|last2=Huang|first2=Y.-H.|last3=Witek|first3=H. A.|last4=Lee|first4=Y.-P.|bibcode=2013Sci...340..174S|s2cid=31499893))</ref> This achievement (published in ''[[Science (magazine)|Science]]'') has important implications on the understanding of fundamental processes in [[environmental chemistry]].<ref>((cite web|title=NCTU chemists make air pollution breakthrough|url=http://taiwantoday.tw/ct.asp?xitem=204231&CtNode=416|publisher=[[Taiwan Today]]|access-date=2013-12-08|date = 2013-04-18))</ref><ref>((cite web|title="Elusive atmospheric intermediates reveal some secrets" Chemistry World, 2013-12-04|url=http://www.rsc.org/chemistryworld/2013/04/criegee-intermediates-atmospheric-chemistry-aerosols|access-date=2014-01-07))</ref>

==Representative publications==
* Henryk A. Witek, Takahito Nakijima, Kimihiko Hirao, "Relativistic and correlated all-electron calculations on the ground and excited states of AgH and AuH", J. Chem. Phys. 113, 8015 (2000).
* Henryk A. Witek, Stephan Irle, Keiji Morokuma, "Analytical second-order geometrical derivatives of energy for the self-consistent-charge density-functional tight-binding method", J. Chem. Phys. 121, 5163 (2004).
* Su YT, Huang YH, Witek HA, [[Lee YP]], "Infrared absorption spectrum of the simplest Criegee intermediate CH2OO", Science 340, 174 (2013).

==Awards==
In 2005, he obtained Young Faculty Award and Scholarship from the Foundation for the Advancement of Outstanding Scholarship.<ref>((cite web|title=Henryk Witek - CV |url=http://ts2c2.flas.kps.ku.ac.th/cv_ispeaker/CV-Henryk_A_Witek.pdf |access-date=2014-01-11 |archive-url=https://web.archive.org/web/20140111143121/http://ts2c2.flas.kps.ku.ac.th/cv_ispeaker/CV-Henryk_A_Witek.pdf |archive-date=2014-01-11 |url-status=dead ))</ref> In 2006, he became one of four awardees of the [[American Chemical Society]] Outstanding Junior Faculty Award,<ref>((cite web|title=The OpenEye Outstanding Junior Faculty Award in Computational Chemistry|url=http://web2011.acscomp.org/awards/the-comp-acs-outstanding-junior-faculty-award|access-date=2014-01-08))</ref> in 2010, he received the Distinguished Young Chemist Award from the [[Chinese Chemical Society (Taipei)|Chinese Chemical Society]],<ref>((cite web|title=Chinese Chemical Society - Awards (in Chinese)|url=http://chemistry.org.tw/award1.php|access-date=2014-01-10))</ref> and in 2014, he was awarded the APATCC Pople Medal "for his innovative contributions to theoretical and mathematical aspects of quantum chemistry, particularly his contributions to multireference perturbation theory and the density-functional tight-binding method.".<ref>((cite web|title=APATCC - Awards|url=http://www.apatcc.org/awards.html#awardwinners|access-date=2014-05-29))</ref>

==Teaching==
As an academic teacher, he offers semestral courses in general and quantum chemistry. Some of them are available online via the OpenCourseWare platform.<ref>((cite web|title=Online courses via OpenCourseWare |url=http://140.113.86.231/site/channels/55?locale=zh_tw |access-date=2013-11-28 |url-status=dead |archive-url=https://web.archive.org/web/20131203015711/http://140.113.86.231/site/channels/55?locale=zh_tw |archive-date=2013-12-03 ))</ref>
In fall 2017, he taught "Perturbation theory for linear operator", using the book titled the same as the course by mathematician [[Tosio Kato]].

==References==
((Reflist))
((authority control))
((Portal|Taiwan))

((DEFAULTSORT:Witek, Henryk))
[[Category:Living people]]
[[Category:Taiwanese chemists]]
[[Category:Academic staff of the National Chiao Tung University]]
[[Category:University of Tokyo alumni]]
[[Category:Computational chemists]]
[[Category:Year of birth missing (living people)]]

Pages transcluded onto the current version of this page (help):

Henryk Witek (edit)
Template:Authority control (view source) (template editor protected)
Template:Cite journal (view source) (protected)
Template:Cite web (view source) (protected)
Template:Hlist/styles.css (view source) (protected)
Template:Main other (view source) (protected)
Template:Portal (view source) (template editor protected)
Template:Reflist (view source) (protected)
Template:Reflist/styles.css (view source) (protected)
Module:Arguments (view source) (protected)
Module:Authority control (view source) (template editor protected)
Module:Authority control/auxiliary (view source) (template editor protected)
Module:Authority control/config (view source) (template editor protected)
Module:Check for unknown parameters (view source) (protected)
Module:Citation/CS1 (view source) (protected)
Module:Citation/CS1/COinS (view source) (protected)
Module:Citation/CS1/Configuration (view source) (protected)
Module:Citation/CS1/Date validation (view source) (protected)
Module:Citation/CS1/Identifiers (view source) (protected)
Module:Citation/CS1/Utilities (view source) (protected)
Module:Citation/CS1/Whitelist (view source) (protected)
Module:Citation/CS1/styles.css (view source) (protected)
Module:EditAtWikidata (view source) (protected)
Module:Navbar (view source) (protected)
Module:Navbar/configuration (view source) (protected)
Module:Navbox (view source) (template editor protected)
Module:Navbox/configuration (view source) (template editor protected)
Module:Navbox/styles.css (view source) (template editor protected)
Module:Portal (view source) (template editor protected)
Module:Portal/images/t (view source) (template editor protected)
Module:Portal/styles.css (view source) (template editor protected)
Module:Yesno (view source) (protected)

Return to Henryk Witek.

Retrieved from "https://en.wikipedia.org/wiki/Henryk_Witek"