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Publications (10 of 10) Show all publications
Jonsson, A. & Peterson, M. (2019). Consequentialism in infinite worlds. Analysis
Open this publication in new window or tab >>Consequentialism in infinite worlds
2019 (English)In: Analysis, ISSN 0003-2638, E-ISSN 1467-8284Article in journal (Refereed) Accepted
Abstract [en]

We show that in infinite worlds, the following three conditions are incompatible: 1) The spatiotemporal ordering of individuals is morally irrelevant. 2) All else being equal, the act of bringing about a good outcome with a high probability is better than the act of bringing about the same outcome with a low probability. 3) One act is better than another only if there is a nonzero probability that it brings about a better outcome. The impossibility of combining these conditions shows that it is more costly than has been previously acknowledged to endorse 1).

National Category
Probability Theory and Statistics Philosophy
Research subject
Mathematical Statistics
Identifiers
urn:nbn:se:ltu:diva-76012 (URN)
Available from: 2019-09-16 Created: 2019-09-16 Last updated: 2019-09-20
Martinsson, J. & Jonsson, A. (2018). A New Model for the Distribution of Observable Earthquake Magnitudes and Applications to b-Value Estimation. IEEE Geoscience and Remote Sensing Letters, 15(6), 833-837
Open this publication in new window or tab >>A New Model for the Distribution of Observable Earthquake Magnitudes and Applications to b-Value Estimation
2018 (English)In: IEEE Geoscience and Remote Sensing Letters, ISSN 1545-598X, E-ISSN 1558-0571, Vol. 15, no 6, p. 833-837Article in journal (Refereed) Published
Abstract [en]

The b-value in the Gutenberg–Richter (GR) law contains information that is essential for evaluating earthquake hazard and predicting the occurrence of large earthquakes. Estimates of b are often based on seismic events whose magnitude exceed a certain threshold, the so-called magnitude of completeness. Such estimates are sensitive to the choice of threshold and often ignore a substantial portion of available data. We present a general model for the distribution of observable earthquake magnitudes and an estimation procedure that takes all measurements into account. The model is obtained by generalizing previous probabilistic descriptions of sensor network limitations and using a generalization of the GR law. We show that our model is flexible enough to handle spatio-temporal variations in the seismic environment and captures valuable information about sensor network coverage. We also show that the model leads to significantly improved b-value estimates compared with established methods relying on the magnitude of completeness.

Place, publisher, year, edition, pages
IEEE, 2018
National Category
Geophysics Probability Theory and Statistics
Research subject
Mathematical Statistics
Identifiers
urn:nbn:se:ltu:diva-69044 (URN)10.1109/LGRS.2018.2812770 (DOI)000432958000007 ()2-s2.0-85044388582 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-06-05 (rokbeg)

Available from: 2018-06-01 Created: 2018-06-01 Last updated: 2018-09-14Bibliographically approved
Jonsson, A. (2018). Invariant sets for QMF functions. Rocky Mountain Journal of Mathematics, 48(8), 2559-2571
Open this publication in new window or tab >>Invariant sets for QMF functions
2018 (English)In: Rocky Mountain Journal of Mathematics, ISSN 0035-7596, E-ISSN 1945-3795, Vol. 48, no 8, p. 2559-2571Article in journal (Refereed) Published
Abstract [en]

A quadrature mirror filter (QMF) function can be considered as the transition function for a Markov process on the unit interval. The QMF functions that generate scaling functions for multiresolution analyses are then distinguished by properties of their invariant sets. By characterizing these sets, we answer in the affirmative a question raised by Gundy.

Place, publisher, year, edition, pages
Tempe (AZ): Rocky Mountain Mathematics Consortium, 2018
Keywords
Scaling functions, Markov processes, invariant sets
National Category
Probability Theory and Statistics
Research subject
Mathematical Statistics
Identifiers
urn:nbn:se:ltu:diva-69050 (URN)10.1216/RMJ-2018-48-8-2559 (DOI)000454492300005 ()2-s2.0-85061669810 (Scopus ID)
Note

Validerad;2019;Nivå 2;2019-01-29 (inah)

Available from: 2018-08-01 Created: 2018-08-01 Last updated: 2019-09-13Bibliographically approved
Jonsson, A. & Voorneveld, M. (2018). The limit of discounted utilitarianism. Theoretical Economics, 13(1), 19-37
Open this publication in new window or tab >>The limit of discounted utilitarianism
2018 (English)In: Theoretical Economics, ISSN 1933-6837, E-ISSN 1555-7561, Vol. 13, no 1, p. 19-37Article in journal (Refereed) Published
Abstract [en]

This paper presents an infinite-horizon version of intergenerational utilitarianism. By studying discounted utilitarianism as the discount factor tends to one, we obtain a new welfare criterion: limit-discounted utilitarianism (LDU). We show that LDU meets the standard assumptions of efficiency, equity, and interpersonal comparability, but allows us to compare more pairs of utility streams than commonly-used utilitarian criteria, including the overtaking criterion and the catching-up criterion. We also introduce a principle of compensation for postponements of utility streams and use it to characterize the LDU criterion on a restricted domain.

Place, publisher, year, edition, pages
John Wiley & Sons, 2018
National Category
Probability Theory and Statistics
Research subject
Matemathical Statistics
Identifiers
urn:nbn:se:ltu:diva-62081 (URN)10.3982/TE1836 (DOI)000423829200004 ()2-s2.0-85041595302 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-02-02 (andbra)

Available from: 2017-02-20 Created: 2017-02-20 Last updated: 2018-02-19Bibliographically approved
Jonsson, A. (2017). On g-functions for countable state subshifts. Archiv der Mathematik, 109(4), 373-381
Open this publication in new window or tab >>On g-functions for countable state subshifts
2017 (English)In: Archiv der Mathematik, ISSN 0003-889X, E-ISSN 1420-8938, Vol. 109, no 4, p. 373-381Article in journal (Refereed) Published
Abstract [en]

This note revisits the problem of finding necessary and sufficient conditions for a subshift to admit a continuous g-function. Results obtained by Krieger (in: IMS lecture notes monograph series, vol 48, pp 306-316, 2006) on finite alphabet subshifts are generalized to countable state subshifts.

Place, publisher, year, edition, pages
Springer, 2017
Keywords
g-functions, Subshifts, Invariant sets
National Category
Probability Theory and Statistics
Research subject
Matemathical Statistics
Identifiers
urn:nbn:se:ltu:diva-65024 (URN)10.1007/s00013-017-1063-y (DOI)000412815100009 ()2-s2.0-85027363680 (Scopus ID)
Note

Validerad;2017;Nivå 2;2017-09-26 (andbra)

Available from: 2017-08-13 Created: 2017-08-13 Last updated: 2018-07-10Bibliographically approved
Hamodi, H., Lundberg, J., Jonsson, A. & Ahmadi, A. (2015). Case Study: Model for economic lifetime of drilling machines in the Swedish mining industry (ed.). Paper presented at . The Engineering Economist, 60(2), 138-154
Open this publication in new window or tab >>Case Study: Model for economic lifetime of drilling machines in the Swedish mining industry
2015 (English)In: The Engineering Economist, ISSN 0013-791X, E-ISSN 1547-2701, Vol. 60, no 2, p. 138-154Article in journal (Refereed) Published
Abstract [en]

The purpose of this paper is to develop a practical economic replacement decision model to identify the economic lifetime of a mining drilling machine. A data driven optimisation model was developed for operating and maintenance costs, purchase price and machine resale value. Equivalent present value of these costs by using discount rate was considered. The proposed model shows that the absolute optimal replacement time (ORT) of a drilling machine used in one underground mine in Sweden is 115 months. Sensitivity and regression analysis show that the maintenance cost has the largest impact on the ORT of this machine. The proposed decision making model is applicable and useful and can be implemented within the mining industry.

National Category
Other Civil Engineering Probability Theory and Statistics
Research subject
Operation and Maintenance; Matemathical Statistics
Identifiers
urn:nbn:se:ltu:diva-14705 (URN)10.1080/0013791X.2014.952466 (DOI)000353499300003 ()2-s2.0-84928644059 (Scopus ID)e20b5005-d939-4ebe-a128-136ec348a9c2 (Local ID)e20b5005-d939-4ebe-a128-136ec348a9c2 (Archive number)e20b5005-d939-4ebe-a128-136ec348a9c2 (OAI)
Note
Validerad; 2015; Nivå 2; 20140915 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Hamodi, H., Lundberg, J. & Jonsson, A. (2015). Economic lifetime of a drilling machine: a case study on mining industry (ed.). Paper presented at . International Journal of Strategic Engineering Asset Management (IJSEAM), 2(2), 177-189
Open this publication in new window or tab >>Economic lifetime of a drilling machine: a case study on mining industry
2015 (English)In: International Journal of Strategic Engineering Asset Management (IJSEAM), ISSN 1759-9733, E-ISSN 1759-9741, Vol. 2, no 2, p. 177-189Article in journal (Refereed) Published
Abstract [en]

Underground mines use many different types of machinery duringthe drift mining processes of drilling, charging, blasting, loading, scaling andbolting. Drilling machines play a critical role in the mineral extraction processand thus are important economically. However, as the machines age, theirefficiency and effectiveness decrease, negatively affecting productivity andprofitability and increasing total cost. Hence, the economic replacementlifetime of the machine is a key performance indicator. This paper introducesan optimisation model that gives the optimal lifetime for a drilling machine. Acase study has been done at an underground Swedish mine to identify theeconomic replacement time of a drilling machine. It considers the purchaseprice, maintenance and operation costs, and the machine’s second-hand value.Findings show that the economic replacement lifetime of a drilling machine inthis mine is 96 months. The proposed model can be used for other undergroundmining machines.

Keywords
drilling machine, economic replacement time, optimisation model, asset management., Manufacturing engineering and work sciences - Manufacturing engineering, Produktion och arbetsvetenskap - Produktionsteknik
National Category
Other Civil Engineering Probability Theory and Statistics
Research subject
Operation and Maintenance; Matemathical Statistics; Future mining (AERI)
Identifiers
urn:nbn:se:ltu:diva-11071 (URN)10.1504/IJSEAM.2015.070624 (DOI)9fab7268-baa4-4e35-b7fc-12b1e6724b34 (Local ID)9fab7268-baa4-4e35-b7fc-12b1e6724b34 (Archive number)9fab7268-baa4-4e35-b7fc-12b1e6724b34 (OAI)
Note
Validerad; 2015; Nivå 1; Bibliografisk uppgift: Hussan Al-Chalabi received his BEng in Mechanical Engineering from Mosul University, Iraq in 1994 and MSc in Mechanical Engineering in Thermal Power from Mosul University, Iraq in 2008. Then he joined the Department of Mechanical Engineering at Mosul University as a lecturer. Since 2011, he joined the Division of Operation, Maintenance and Acoustics at LTU as a doctoral student. Jan Lundberg is a Professor of Machine Elements at Luleå University of Technology and also a Professor in Operation and Maintenance with focus on product development. During the years 1983–2000, his research concerned mainly about engineering design in the field of machine elements in industrial environments. During the years 2000–2006, his research concerned mainly about industrial design, ergonomic and related problems as cultural aspects of design and modern tools for effective industrial design in industrial environments. From 2006 and forward, his research is completely focused on maintenance issues like methods for measuring failure sources, how to do design out maintenance and how to design for easy maintenance. Adam Jonsson is a Senior Lecturer in the Department of Engineering Sciences and Mathematics, Luleå University of Technology, Sweden. He received his PhD in Statistics in 2008. His research is in applied probability and social welfare economics.; 20150224 (hasham)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Jonsson, A. & Voorneveld, M. (2015). Utilitarianism on infinite utility streams: summable differences and finite averages (ed.). Paper presented at . Economic Theory Bulletin, 3(1), 19-31
Open this publication in new window or tab >>Utilitarianism on infinite utility streams: summable differences and finite averages
2015 (English)In: Economic Theory Bulletin, ISSN 2196-1085, E-ISSN 2196-1093, Vol. 3, no 1, p. 19-31Article in journal (Refereed) Published
Abstract [en]

This paper provides axiomatic descriptions of social welfare relations, defined on infinite streams of utility, that are consistent with the utilitarian criterion on subsets where maximizing aggregate utility has a clear interpretation: the streams, or their differences, are summable. Besides standard assumptions on efficiency, equity and interpersonal comparability, two axioms are introduced and shown to be necessary and sufficient. A more general version of one axiom suffices to distinguish streams with different long-run averages.

National Category
Probability Theory and Statistics
Research subject
Matemathical Statistics
Identifiers
urn:nbn:se:ltu:diva-13414 (URN)10.1007/s40505-014-0056-2 (DOI)ca410151-9a34-4e33-8084-f4a7a957b340 (Local ID)ca410151-9a34-4e33-8084-f4a7a957b340 (Archive number)ca410151-9a34-4e33-8084-f4a7a957b340 (OAI)
Note
Validerad; 2015; Nivå 1; 20140916 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Hamodi, H., Lundberg, J. & Jonsson, A. (2013). Economic lifetime of a drilling machine: a case study on mining industry (ed.). In: (Ed.), sari Monto; Miia Pirttilä; Timo Kärri (Ed.), MPMM 2013 (Maintenance Performance Measurement and Management): . Paper presented at Maintenance Performance Measurement and Management Conference : 12/09/2013 - 13/09/2013 (pp. 138-147). Lappeenranta, Finland: MPMM 2013
Open this publication in new window or tab >>Economic lifetime of a drilling machine: a case study on mining industry
2013 (English)In: MPMM 2013 (Maintenance Performance Measurement and Management) / [ed] sari Monto; Miia Pirttilä; Timo Kärri, Lappeenranta, Finland: MPMM 2013 , 2013, p. 138-147Conference paper, Published paper (Refereed)
Abstract [en]

Underground mines use many different types of machinery during the drift mining processesof drilling, charging, blasting, loading, scaling and bolting. Drilling machines play a criticalrole in the mineral extraction process and thus are important economically. However, as themachines age, their efficiency and effectiveness decrease, negatively affecting productivityand profitability and increasing total cost. Hence, the economic replacement lifetime of themachine is a key performance indicator. This paper introduces an optimisation model thatgives the optimal lifetime for a drilling machine. A case study has been done at anunderground Swedish mine to identify the economic replacement time of a drilling machine.It considers the purchase price, maintenance and operation costs, and the machine’s secondhandvalue. Findings show that the economic replacement lifetime of a drilling machine inthis mine is 96 months. The proposed model can be used for other underground miningmachines.

Place, publisher, year, edition, pages
Lappeenranta, Finland: MPMM 2013, 2013
Keywords
Drilling machine, Optimal equipment lifetime, Optimization model., Industrial engineering and economy - Other industrial engineering and economics, Industriell teknik och ekonomi - Övrig industriell teknik och ekonomi
National Category
Other Civil Engineering Probability Theory and Statistics
Research subject
Operation and Maintenance; Matemathical Statistics
Identifiers
urn:nbn:se:ltu:diva-26974 (URN)04128c92-657f-4d30-a614-7b81dded6aa4 (Local ID)978-952-265-443-4 (ISBN)04128c92-657f-4d30-a614-7b81dded6aa4 (Archive number)04128c92-657f-4d30-a614-7b81dded6aa4 (OAI)
Conference
Maintenance Performance Measurement and Management Conference : 12/09/2013 - 13/09/2013
Note
Godkänd; 2013; Bibliografisk uppgift: Hussan Al-Chalabi received B.sc.Eng. degree in Mechanical Engineering from Mosul University, Iraq in 1994 and M.Sc degree in Mechanical Engineering in thermal power from Mosul University, Iraq in 2008. Then he joined the Department of Mechanical Engineering at Mosul University as a lecturer. Since 2011, he joined the Division of Operation, Maintenance and Acoustics at LTU as a doctoral student.; 20130916 (hasham)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Gundy, R. & Jonsson, A. (2010). Scaling Functions on R2 for Dilations with Determinant ±2 (ed.). Paper presented at . Applied and Computational Harmonic Analysis, 29(1), 49-62
Open this publication in new window or tab >>Scaling Functions on R2 for Dilations with Determinant ±2
2010 (English)In: Applied and Computational Harmonic Analysis, ISSN 1063-5203, E-ISSN 1096-603X, Vol. 29, no 1, p. 49-62Article in journal (Refereed) Published
Abstract [en]

This paper gives necessary and sufficient conditions for a doubly periodic function p(ξ ), ξ ∈ R2, to be the squared modulus of a lowpass filter for a multiresolution analysis of L2(R2) with respect to an expanding matrix A of determinant ±2. By transferring the underlying spaces, R or R2, to a single binary sequence space, we are able to show that, when det(A) = 2, every scaling function on R2 corresponds to one on R, where the dilation is ±2. If det(A)=−2, this is no longer true. In this case, the lowpass filter for the stretched Haar function makes an unexpected appearance.

Identifiers
urn:nbn:se:ltu:diva-3430 (URN)10.1016/j.acha.2009.08.004 (DOI)140fed47-c126-4b1b-81cf-ebf49b70bb9a (Local ID)140fed47-c126-4b1b-81cf-ebf49b70bb9a (Archive number)140fed47-c126-4b1b-81cf-ebf49b70bb9a (OAI)
Note
Upprättat; 2010; 20130619 (adajon)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7656-7271

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