Research
- Theoretical physics
- Quantum optics
- Quantum gravity
- QFT
- QED
- Atom chips
- Decoherence phenomena
- Casimir-Polder force and QED
- Memory effects in spontaneous emission processes
- Book to appear: "Selected Problems and Solutions in Quantum Optics" collaboration with Professor Bo-Sture Skagerstam
- Logistics
- Dynamic Pricing
- Book ta appear: "Inventory Models" collaboration with Professor Nils Rudi
Projects
Education
- NTNU, master of science, 1992-1998
- NTNU, Ph.D., 1998-2001
- Imperial College, Post Doc, 2002-2004
- Universität Graz, Post Doc, 2005-2006
Publications
-
Pettersen, Bård Inge & Rekdal, Per Kristian
(2023).
Innføring i bedriftsøkonomi.
Pytagoras forlag.
ISBN 978-82-93995-06-7.
182 p.
-
Pettersen, Bård Inge & Rekdal, Per Kristian
(2023).
Lager- og produksjonsplanlegging : oppgaver og løsninger.
Pytagoras Forlag.
ISBN 978-82-93995-04-3.
183 p.
-
Pettersen, Bård Inge & Rekdal, Per Kristian
(2023).
Anvendt statistikk : oppgaver og løsninger .
Pytagoras Forlag.
ISBN 978-82-93995-03-6.
200 p.
-
Pettersen, Bård Inge & Rekdal, Per Kristian
(2022).
Diskret matematikk og informatikk : del 1 .
Pytagoras forlag.
ISBN 9788269236194.
225 p.
-
Rekdal, Per Kristian & Pettersen, Bård Inge
(2022).
Hvordan lykkes som student?
Pytagoras forlag.
ISBN 9788269236187.
90 p.
-
Pettersen, Bård Inge & Rekdal, Per Kristian
(2022).
Anvendt statistikk.
Pytagoras forlag.
ISBN 978-82-692361-6-3.
297 p.
-
Pettersen, Bård Inge & Rekdal, Per Kristian
(2022).
Lager- og produksjonsplanlegging.
Pytagoras forlag.
ISBN 9788269236170.
188 p.
-
Pettersen, Bård Inge & Rekdal, Per Kristian
(2021).
Grunnleggende matematikk.
Pytagoras forlag.
ISBN 978-82-692361-4-9.
138 p.
-
Pettersen, Bård Inge & Rekdal, Per Kristian
(2021).
Anvendt matematikk.
Pytagoras forlag.
ISBN 978-82-692361-5-6.
476 p.
-
Pettersen, Bård Inge & Rekdal, Per Kristian
(2021).
Anvendt statistikk : del 2: statistisk inferens.
Pytagoras forlag.
ISBN 978-82-692361-2-5.
151 p.
-
Pettersen, Bård Inge & Rekdal, Per Kristian
(2021).
Anvendt statistikk : del 1: sannsynlighetslære.
Pytagoras forlag.
ISBN 978-82-692361-0-1.
198 p.
View all works in Cristin
-
Sætren, Malene Lunde; Rekdal, Per Kristian; Pettersen, Bård Inge; Kippernes, Mari Aandahl & Eikrem, Allan
(2024).
Stadig flere studerer over nett.
[TV].
nrk.no/mr.
-
-
-
Rekdal, Per Kristian; Vaagsether, Are & Reitan, Marie
(2022).
Kurser studenter landet rundt før studiestart.
[Newspaper].
Romsdals Budstikke.
-
Rekdal, Per Kristian & Lohaugen, Karianne
(2021).
Tar mattekurs på sommeren.
[TV].
NRK1 Møre og Romsdal.
-
Rekdal, Per Kristian & Lohaugen, Karianne
(2021).
Tar sommerkurs i matematikk.
[TV].
NRK1 MidtNytt.
-
-
-
-
Langelo, Erik; Pettersen, Bård Inge & Rekdal, Per Kristian
(2019).
The profit-maximizing lot size problem with pricing lag effects.
Show summary
In 1970, Joseph Thomas extended the well-known dynamic lot size model of Wagner and Whitin to include variable prices, as well as variable production costs. This master thesis extends Thomas’ model to include something called the “lag effect”.
Formally, this master thesis models a disaggregated, finite-horizon, profit-maximizing dynamic lot size problem with pricing lag effects in demand. This effect models the tendency for customers to stock up on a product when it is offered for cheap, causing demand to increase in the “cheap” time period, while it decreases in the next. In effect, lowering the price causes demand to shift backwards in time, in addition to increasing demand as in most demand functions.
The problem is to decide in which time periods to produce, how much to produce in each period, and which price to set in each period. The objective is to maximize the total profit, defined as total revenue minus total setup cost, production cost and inventory holding cost.
Three theorems which restrict the amount of possible optimal solutions are proved. A solution is then provided to the production horizon problem, a sub-problem of the main problem. The production horizon problem is then solved with two different models: with and without the lag effect. The optimal solutions of these models are then compared for varying values of some key parameters.
Keywords: revenue management and pricing, inventory
-
Langelo, Erik; Pettersen, Bård Inge & Rekdal, Per Kristian
(2019).
The profit-maximizing lot size problem with pricing lag effects
.
Show summary
In 1970, Joseph Thomas extended the well-known dynamic lot size model
of Wagner and Whitin to include variable prices, as well as variable production
costs. This work extends Thomas’ model to include something called the lag
effect.
Formally, this work models a disaggregated, finite-horizon, profit-maximizing
dynamic lot size problem with pricing lag effects in demand. This effect models the tendency for customers to stock up on a product when it is offered for
cheap, causing demand to increase in the given time period, while it decreases
in the next. In effect, lowering the price causes demand to shift backwards in
time, in addition to increasing demand as in most demand functions.
The problem is to decide in which time periods to produce, how much to
produce in each period, and which price to set in each period. The objective
is to maximize the total profit, defined as total revenue minus total setup cost,
production cost and inventory holding cost.
Three theorems which restrict the amount of possible optimal solutions are
proved. A solution is then provided to the production horizon problem, a
sub-problem of the main problem. The production horizon problem is then
solved with two different models: with and without the lag effect. The optimal
solutions of these models are then compared for varying values of some key
parameters.
-
Rekdal, Per Kristian; Pettersen, Bård Inge & Amundsgård, Herman
(2019).
Innfører møteplikt for mattestudentene
.
[Newspaper].
Romsdals Budstikke.
-
Rekdal, Per Kristian
(2017).
hiMoldeX.no : open course platform.
-
-
-
Rekdal, Per Kristian & Resvoll, Liv-Inger
(2016).
Digitalisering viktig for studentrekrutteringa.
[Internet].
norgesuniversitetet.no.
-
-
-
Bjerkeland, Øystein & Rekdal, Per Kristian
(2016).
Stort stryk på matte-eksamen.
[Newspaper].
Romsdals budstikke.
Show summary
30 prosent av studentene som tok eksamen ved Høgskolen i Molde før jul fikk strykkarakteren F i matematikk. I Kristiansund strøk halvparten av studentene.
-
-
-
-
-
-
-
-
-
-
Rekdal, Per Kristian & Landsvik, Solveig Oterhals
(2014).
Høgskolen utvider radiusen.
[Newspaper].
Romsdals budstikke.
Show summary
Studenter fra hele landet følger undervisning på video. 29 fag tilgjengelig. Bruker Facebook til fjernveiledning
-
Rekdal, Per Kristian
(2014).
Enriching students’ mathematics learning through YouTube and facebook.
-
Rekdal, Per Kristian & Hagesæther, Pål Vegard
(2014).
En flom av norske nettilbud : Høgskolen i Molde er blant pionerene i Norge.
[Newspaper].
Aftenposten.
-
-
Rekdal, Per Kristian
(2013).
Sportsrevyen.
[TV].
www.nrk.no.
-
-
-
Rekdal, Per Kristian
(2013).
himoldeX.no - viktig for nærlingslivet i Molde?
-
Rekdal, Per Kristian
(2013).
Open Access - for science and teaching.
-
Rekdal, Per Kristian & Gjerde, Anne
(2013).
Fotballproffer tester ny studieløsning.
[Newspaper].
www.dn.no.
-
-
-
Rekdal, Per Kristian
(2013).
Kombinerer fotball og studier via nett.
[TV].
www.mfk.no.
-
-
-
Rekdal, Per Kristian
(2013).
HIM med åpne kurs.
[Internet].
http://norgesuniversitetet.no/.
-
Slåtto, Torhild & Rekdal, Per Kristian
(2013).
Helt åpne læringsressurser fra Høgskolen i Molde : klasseromsfølelsen skal med inn på nettet.
[Internet].
Synkron : magasin for innovativ utdanning, 2013 nr 3.
Show summary
Mens mooc-feberen slår inn på de nordiske universitetene, jobber Høgskolen i Molde etter en annen idé. Utdanning skal ut til folket, det vil si til dem som ikke kan komme til campus. Det skal være gratis for studenten, og det skal ikke koste for mye for høgskolen heller
-
Rekdal, Per Kristian
(2012).
Basic research & theoretical physics in Molde.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
View all works in Cristin
Published Sep. 3, 2018 4:00 PM
- Last modified Oct. 19, 2018 8:18 PM