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Search Results: 1 - 10 of 415 matches for " Jari Lehto "
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Benefits of DfX in Requirements Engineering  [PDF]
Jari Lehto, Janne Harkonen, Harri Haapasalo, Pekka Belt, Matti Mottonen, Pasi Kuvaja
Technology and Investment (TI) , 2011, DOI: 10.4236/ti.2011.21004
Abstract: Information and communications technology (ICT) companies have realised how acknowledging the needs of both internal and external customers is a necessity for successful requirements engineering. Design for X (DfX) is a potential management approach for coordinating & communicating requirements emerging from both internal functions and external supply chain partners. This article studies the potential of DfX for improved requirements engineering. Qualitative interviews are utilised to analyse how different organisations implement the concept, including designers’ actual work, methods & tools, and organisational aspects. The results include viewing DfX as means to achieve relevant competitive goals, and describing how different companies organise these activities, together with their benefits for modern ICT companies. This study highlights how the DfX concept can be used to manage, prioritise and to better communicate
The Engagement between Knowledge Transfer and Requirements Engineering
Anyanitha Distanont,Harri Haapasalo,Mirja Vaananen,Jari Lehto
International Journal of Management, Knowledge and Learning , 2012,
Abstract: Developing requirements in the early phase of product development is a processthat poses considerable challenges. The most significant challenge ishow to effectively transfer knowledge-related requirements. This paper highlightsthe challenges related to knowledge transfer practices, while developingrequirements through a review of literature and an analysis of high-techcompany interviews. The most significant challenges and their effects on practicesare also discussed. We found that the roots of any difficulty in requirementstransfer were embedded in the failure to transfer knowledge-relatedrequirements and facilitate communication between stakeholders. This difficultyaffects stakeholders’ common understanding. Therefore, interpretationsof the requirements vary and do not match the stakeholders’ intentions.Lastly, the final requirements and specifications sent are unclear and ambiguousso the requirements need to be changed and modified.
Quantization of Keplerian systems
Ari Lehto
Physics , 2006,
Abstract: A mathematical model is given for the occurrence of preferred orbits and orbital velocities in a Keplerian system. The result can be extended into energies and other properties of physical systems. The values given by the model fit closely with observations if the Planck scale is chosen as origin and the process considered as volumetric doubling in 3- and 4-dimensions. Examples of possible period tripling are also given. Comparison is made with the properties of the basic elementary particles, the Solar system and other physical phenomena.
Crosslinking as an Efficient Tool for Decreasing Moisture Sensitivity of Biobased Nanocomposite Films  [PDF]
Jari Vartiainen, Ali Harlin
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.25045
Abstract: Chitosan-nanoclay bio-hybrid films were successfully crosslinked with glutaraldehyde, genipin and glyoxal. Moisture sensitivity of films decreased as a result of crosslinking which led to improved barrier properties against water vapor and oxygen. Films containing chitosan (6.6 g/m2) with genipin (3.3 g/m2) and nanoclay (6.6 g/m2) had water vapor transmission rate of 72 g × 100 µm/(m2 × 24 h) which was 34% lower as compared to pure chitosan and 30% lower as compared to chitosan/nanoclay without crosslinkers. Glyoxal induced crosslinking resulted in 92% reduction in oxygen transmission rate at 80% relative humidity as compared to pure chitosan films. Oxygen transmission through glyoxal (3.3 g/m2) treated chitosan/nanoclay film was 2.8 cm3 × 100 µm/(m2 × 24 h) which was 53% lower as compared to chitosan/nanoclay without crosslinkers. In addition, nanoclay and especially glyoxal crosslinking prevented the water vapor sorption of chitosan considerably. Crosslinking may be used as an efficient tool for enhancing the exploitability of naturally hydrophilic biopolymers towards new high-value applications, such as food packaging.
BEYOND GUNS AND BUTTER: Finnish Central Government Spending Patterns the in Twentieth Century
Jari Eloranta,Jari Kauppila
Essays in Economic & Business History , 2008,
Abstract: This paper explains the long-run demand for central government spending in Finland by analyzing quantitative and qualitative changes in the spending behavior, examining possible links between variables in a VAR-framework, and performing multivariate analysis of the demand factors. The results was shoved that a explained by a lack of military versus social spending tradeoff effect. Even though certain other variables were found to be relevant in explaining this demand, this lack of a tradeoff increased the Finnish spending levels substantially during the twentieth centurt welfare state expansion.
Is empty spacetime a physical thing?
Diego Meschini,Markku Lehto
Physics , 2005, DOI: 10.1007/s10701-006-9058-8
Abstract: This article deals with empty spacetime and the question of its physical reality. By "empty spacetime" we mean a collection of bare spacetime points, the remains of ridding spacetime of all matter and fields. We ask whether these geometric objects--themselves intrinsic to the concept of field--might be observable through some physical test. By taking quantum-mechanical notions into account, we challenge the negative conclusion drawn from the diffeomorphism invariance postulate of general relativity, and we propose new foundational ideas regarding the possible observation--as well as conceptual overthrow--of this geometric ether.
Application for Superconvergence of Finite Element Approximations for the Elliptic Problem by Global and Local L2-Projection Methods  [PDF]
Rabeea H. Jari, Lin Mu
American Journal of Computational Mathematics (AJCM) , 2012, DOI: 10.4236/ajcm.2012.24034
Abstract: Numerical experiments are given to verify the theoretical results for superconvergence of the elliptic problem by global and local L2-Projection methods.
Imaging Review of Adolescent Tibial Tuberosity Fractures  [PDF]
Pranav Chitkara, Raja Anne, Sherlin Lavianlivi, Scott Lehto, Srinivas Kolla
Open Journal of Medical Imaging (OJMI) , 2013, DOI: 10.4236/ojmi.2013.33014
Abstract:

Adolescent tibial tuberosity injuries are infrequent fractures usually seen in physically active adolescent males. Powerful contraction of the knee extensors by sudden acceleration or deceleration of the quadriceps muscle can result in avulsion fractures of the tibial tuberosity apophysis. In late puberty, as the growth plate closes, it is transiently replaced by fibrocartilaginous elements. This transition causes a period of weakened tensile strength, which predisposes the tibial tuberosity to traction injury. Classification of tibial tuberosity fractures includes types I-V with added A and B subsets to types I, II and III. Multidetector computed tomography (MDCT) is a useful tool to more accurately classify complex, higher grade adolescent tibial tuberosity avulsion fractures when compared to plain film. This aids in preoperative planning and, therefore, results in improved treatment and management.

Note on the paper “Regulated domains and Bergman type projections”
Jari Taskinen
Journal of Function Spaces and Applications , 2004, DOI: 10.1155/2004/615850
Abstract: We show that the sufficient condition of the above mentioned paper is also necessary for the boundedness of Bergman type projections on a class of regulated domains.
E-Business Initiated Change of Business Relationship Structure and Interaction Process
Jari Salo
International Journal of Electronic Business Management , 2008,
Abstract: It is already widely known fact that e-business has been adopted across industries to better manage internal business processes as well as interfacing activities. Different types ofe-business systems including E-CRM, E-SCM, ERP1/2 among others are used to manageabove mentioned processes. Both in the academic and the business worlds e-business hasreceived undivided attention for over decade now. The focus has been on consumer marketsas well as business markets, the latter forms larger proportion of e-business when measuredin economic terms. This is our focus area. Contrary to conventional knowledge, it has beenillustrated that electronic marketplaces weaken existing business relationships and thuspertinent focus of this paper is not on these marketplaces but on business relationships.Therefore, main purpose of this paper is to conceptualize and empirically display howe-business impacts on the structure and interaction in a business relationships. In anutshell, this means we are describing novel ways to conceptualize relationship structureand process characteristics. To address this, we have made a broad literature review thatcovers pertinent parts of e-business literature and applicable aspects of businessrelationship discussion. A twin case study was conducted to compare the developedtheoretical framework with real world presented by the steel industry case studies in orderto form solid ground for our empirically grounded framework. The preliminary findingssuggest that antecedent for successful e-business adoption is a proper digital infrastructureand from there e-business enables and facilitates routine processes in relationships.
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