Matti Vartiainen

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This paper aims at identifying critical factors affecting organization-wide implementation of requirements engineering (RE) processes. The paper is based on a broad literature review and three longitudinal case studies that were carried out using an action research method. The results indicate that RE process implementation is a demanding undertaking, and(More)
Paradoxical heat sensations during cooling of the skin were examined in two experiments. In Expt. I the number of occurrences of sensation was studied in 19 naive test subjects (Ss) when cooling from thermal indifference both without and with preceding heating. Without preceding heating 13 Ss reported sensations of paradoxical heat (9.8% of all(More)
This research aims at understanding how people share knowledge in their everyday work in a project-based company. The social structures for knowledge sharing are characterised as formal, informal, and quasi-informal structures. They vary from those with high formalisation to the informal, and even include structures which are invisible and unrecognised in(More)
The efficacy of activated charcoal and ipecac syrup in the prevention of drug absorption was studied in 6 healthy adult volunteers, using a randomized, cross-over design. Paracetamol 1000 mg, tetracycline 500 mg and aminophylline 350 mg were ingested on an empty stomach with 100 ml water. Then, after 5 or 30 min, the subjects ingested, either activated(More)
To study the levels and distributions of radionuclides released in the Chernobyl accident, we sampled surface peat from 62 sites in Southern and Central Finland and measured 131I, 134Cs, 137Cs, 132Te, 140Ba, 103Ru, 90Sr, 141Ce, and 95Zr. The distribution of fallout activities was highly uneven, depending on movement of the contaminated air mass and rainfall(More)
In-vehicle exposures to different sizes of particles and carbon monoxide (CO) were determined while driving along a standardized route under a variety of traffic conditions in Kuopio, Finland during the 12-month period from January to December 1995. Arithmetic means of in-vehicle exposures during the morning rush hours were 5.7 parts per million (ppm)(More)
AIMS To compare the long-term effects of individual physiotherapy at an outpatient clinic, including electrical stimulation (ES), active pelvic floor muscle exercises (PFMEs), and training with a vaginal ball (VB), with home-based active PFMEs and training with a VB, in cases of female stress urinary incontinence (SUI). MATERIALS AND METHOD Thirty-three(More)
Purpose: Knowledge Work (KW) is a well-researched topic. However, KW is difficult to measure and little consensus has been reached on elements that affect knowledge work productivity on a team level. The current theories neglect teams working in distributed geographical areas. The purpose of the paper is to integrate recent literature on knowledge work(More)
This paper presents a framework to analyze knowledge work in the changing context of new ways of working. Knowledge work increasingly takes place as collaboration from different and changing workplaces due to mobility, multi-locational, and geographical distribution of participants. We define the framework based on five key factors that pose challenges to(More)
Personal 48-hr exposures to formaldehyde and acetaldehyde of 15 randomly selected participants were measured during the summer/autumn of 1997 using Sep-Pak DNPH-Silica cartridges as a part of the EXPOLIS study in Helsinki, Finland. In addition to personal exposures, simultaneous measurements of microenvironmental concentrations were conducted at each(More)