[article] Insinööritieteiden korkeakoulu / ENG

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A12-station anatomic hip joint simulator
(IMechE, 2005) Saikko, Vesa; Konetekniikan laitos; Department of Mechanical Engineering; Insinööritieteiden korkeakoulu; School of Engineering
Adverse condition testing with hip simulators
(Elsevier, 2015) Saikko, Vesa; Konetekniikan laitos; Department of Mechanical Engineering; Insinööritieteiden korkeakoulu; School of Engineering
Analysis of UHMWPE wear particles produced in the simulation of hip and knee wear mechanisms with the RandomPOD system
(Elsevier, 2015) Saikko, Vesa; Vuorinen, Vesa; Revitzer, Hannu; Konetekniikan laitos; Department of Mechanical Engineering; Kemian laitos; Department of Chemistry; Sähkötekniikan ja automaation laitos; Department of Electrical Engineering and Automation; Insinööritieteiden korkeakoulu; School of Engineering; Kemian tekniikan korkeakoulu; School of Chemical Technology; Sähkötekniikan korkeakoulu; School of Electrical Engineering
Case Study on Design Management: Inefficiencies and Possible Remedies
(International Group for Lean Construction, 2015) Dave, Bhargav; Pikas, Ergo; Koskela, Lauri; Liias, Roode; Rakennustekniikan laitos; Department of Civil and Structural Engineering; BIMforLean; Insinööritieteiden korkeakoulu; School of Engineering
Delivering better products with a reduced lead time and less resources has become the primary focus of design management. The aim of this work is to revisit typical design management inefficiencies and discuss possible remedies for these problems. To this end, a case study and interviews with seven Estonian architects were carried out. The data obtained was analyzed within the framework of the transformation-flow-value theory of production. Despite its failure to deliver customer value, a single-minded transformation view of operations has been the dominant approach taken in design management and processes, leading to inefficiencies in design practices.
Collaborative futuring with and by makers
(Informa UK Limited, 2014) Hyysalo, Sampsa; Kohtala, Cindy; Helminen, Pia; Mäkinen, Samuli; Miettinen, Virve; Muurinen, Lotta; Koneenrakennustekniikan laitos; Department of Engineering Design and Production; Johtamisen laitos; Department of Management Studies; Tuotantotalouden laitos; Department of Industrial Engineering and Management; Muotoilun laitos; Department of Design; INUSE Research Group; Insinööritieteiden korkeakoulu; School of Engineering; Kauppakorkeakoulu; School of Business; Perustieteiden korkeakoulu; School of Science; Taiteiden ja suunnittelun korkeakoulu; School of Arts, Design and Architecture
Maker spaces and maker activities offering access to low-cost digital fabrication equipment are rapidly proliferating, evolving phenomena at the interface of lay and professional design. They also come in many varieties and change fast, presenting a difficult target for, for instance, public authorities, who would like to cater for them but operate in much slower planning cycles. As part of participatory planning of Helsinki Central Library, we experimented with a form of collaborative futuring with and by makers. By drawing elements from both lead-user workshops and participatory design,we conducted a futuring workshop, which allowed us to engage the local maker communities in identifying the issues relevant for a public maker space in 2020. It further engaged the participants in envisioning a smaller prototype maker space and invited them into realising its activities collaboratively. Our results indicate that particularly the information about future solutions was of high relevance, as was the opportunity to trial and elaborate activities on a rolling basis in the prototype space. Insights about more general trends in making were useful too, but to a lesser extent, and it is likely that these could have been gained just as easily with more traditional means for futuring.
Collective dynamics of pedestrians interacting with attractions
(American Physical Society (APS), 2013) Kwak, Jaeyoung; Jo, Hang-Hyun; Luttinen, Tapio; Kosonen, Iisakki; Rakennetun ympäristön laitos; Department of Built Environment; Insinööritieteiden korkeakoulu; School of Engineering
In order to investigate collective effects of interactions between pedestrians and attractions, this study extends the social force model. Such interactions lead pedestrians to form stable clusters around attractions, or even to rush into attractions if the interaction becomes stronger. It is also found that for high pedestrian density and intermediate interaction strength, some pedestrians rush into attractions while others move to neighboring attractions. These collective patterns of pedestrian movements or phases and transitions between them are systematically presented in a phase diagram. The results suggest that safe and efficient use of pedestrian areas can be achieved by moderating the pedestrian density and the strength of attractive interaction, for example, in order to avoid situations involving extreme desire for limited resources.
Community Informatics in Cities: New Catalysts for Urban Change.
(Journal of Community Informatics, 2014) Horelli, Liisa; Sadoway, David; Maankäyttötieteiden laitos; Department of Real Estate, Planning and Geoinformatics; Insinööritieteiden korkeakoulu; School of Engineering
Complexity in Designing Energy Efficient Buildings: Towards Understanding Decision Networks in Design
(International Group for Lean Construction, 2015) Dave, Bhargav; Pikas, Ergo; Koskela, Lauri; Thalfeldt, Martin; Kurnitski, Jarek; Rakennustekniikan laitos; Department of Civil and Structural Engineering; Insinööritieteiden korkeakoulu; School of Engineering
Most important decisions for designing energy efficient buildings are made in the early stages of design. Designing is a complex interdisciplinary task, and energy efficiency requirements are pushing boundaries even further. This study analyzes the level of complexity for energy efficient building design and possible remedies for managing or reducing the complexity. Methodologically, we used the design structure matrix for mapping the current design tasks and hierarchical decomposition of lifecycle analysis for visualizing the interdependency of the design tasks and design disciplines and how changes propagate throughout the system, tasks and disciplines. We have visualized the interdependency of design tasks and design disciplines and how changes propagate throughout the system. Current design of energy efficiency building is a linear and one-shot approach without iterations planned into the process. Broken management techniques do not help to reduce the complexity.
Design for gender equality - the history of cohousing ideas and realities
(Alexandrine Press, 2012) Vestbro, Dick Urban; Horelli, Liisa; Maankäyttötieteiden laitos; Department of Real Estate, Planning and Geoinformatics; Planning and Urban Studies Group Department of Real Estate, Planning and Geoinformatics; Insinööritieteiden korkeakoulu; School of Engineering
Today’s development of alternative types of housing with communal spaces and shared facilities, called cohousing, has been influenced by utopian visions, practical proposals and implemented pro-jects far back in the past. This article traces the driving forces behind the various models of communitarian settlements, cooperative housekeeping, central kitchen buildings, collective housing and collaborative residential experiments while focusing specifically on the design and gender aspects of these models. An emphasis is given to feminist arguments for cohousing, as well as a discussion of the patriarchal resistance against various forms of housing and living based on equality and neighbourly cooperation. The article includes an analysis of the relief of house work burdens and of the possibility for men to be courageously domesticated through this type of housing. The main research methods comprise analyses of literature and the researchers’ own practical experiences of cohousing. The authors claim that cohousing in Scandinavian and some other countries has contributed to a more equal distribution of responsibilities for house work. However, the number of people living in cohousing is still too small to influence the gender segregation of labour markets. It is furthermore concluded that design factors, such as the quality of shared spaces, easy access to common rooms and indoor communication, are important for the smooth functioning of cohousing.
Development and performance of the public real estate investment sector in Finland
(Vilnius Gediminas Technical University ; Publisher Taylor and Francis, 2013) Falkenbach, Heidi; Niskanen, Jaakko; Kiehelä, Sami; Department of Real Estate, Planning and Geoinformatics; Maankäyttötieteiden laitos; Real Estate Research Group (REG); Kiinteistötalouden tutkimusryhmä (REG); Insinööritieteiden korkeakoulu; School of Engineering
The article studies the development of the public real estate equity sector. The paper describes and analyses the legislative development regarding the sector and the vehicles provided. It discusses the past development of public commercial real estate equity investments in Finland and their role as a market participant. In addition, the paper analyses the historical performance of the sector.
The effect of acetabular cup position on wear of a large-diameter metal-on-metal prosthesis studied with a hip joint simulator
(Elsevier, 2013) Saikko, Vesa; Ahlroos, Tiina; Revitzer, Hannu; Ryti, Oskari; Kuosmanen, Petri; Konetekniikan laitos; Department of Mechanical Engineering; Kemian laitos; Department of Chemistry; Insinööritieteiden korkeakoulu; School of Engineering; Kemian tekniikan korkeakoulu; School of Chemical Technology
Effect of CoCr Counterface Roughness on the Wear of UHMWPE in the Noncyclic RandomPOD Simulation
(ASME International, 2017) Saikko, Vesa; Vuorinen, Vesa; Revitzer, Hannu; Konetekniikan laitos; Department of Mechanical Engineering; Kemian laitos; Department of Chemistry; Sähkötekniikan ja automaation laitos; Department of Electrical Engineering and Automation; Insinööritieteiden korkeakoulu; School of Engineering; Kemian tekniikan korkeakoulu; School of Chemical Technology; Sähkötekniikan korkeakoulu; School of Electrical Engineering
Effect of contact area on the wear of ultrahigh molecular weight polyethylene in noncyclic pin-on-disk tests
(Elsevier BV, 2017) Saikko, Vesa; Konetekniikan laitos; Department of Mechanical Engineering; Insinööritieteiden korkeakoulu; School of Engineering
Effect of contact pressure on wear and friction of ultra-high molecular weight polyethylene in multidirectional sliding
(IMechE, 2006) Saikko, Vesa; Konetekniikan laitos; Department of Mechanical Engineering; Insinööritieteiden korkeakoulu; School of Engineering
Effect of increased load on the wear of a large diameter metal-on-metal modular hip prosthesis with a high inclination angle of the acetabular cup
(Elsevier, 2016) Saikko, Vesa; Konetekniikan laitos; Department of Mechanical Engineering; Insinööritieteiden korkeakoulu; School of Engineering
Effect of shelf versus accelerated aging of UHMWPE on delamination in knee wear simulation
(Elsevier, 2014) Saikko, Vesa; Konetekniikan laitos; Department of Mechanical Engineering; Insinööritieteiden korkeakoulu; School of Engineering
An efficient algorithm for bi-objective combined heat and power production planning under the emission trading scheme
(Elsevier, 2014) Rong, Aiying; Figueira, José Rui; Lahdelma, Risto; Department of Energy Technology; Energiatekniikan laitos; Energy Efficiency and Systems; Insinööritieteiden korkeakoulu; School of Engineering
The growing environmental awareness and the apparent conflicts between economic and environmental objectives turn energy planning problems naturally into multi-objective optimization problems. In the current study, mixed fuel combustion is considered as an option to achieve tradeoff between economic objective (associated with fuel cost) and emission objective (measured in CO2 emission cost according to fuels and emission allowance price) because a fuel with higher emissions is usually cheaper than one with lower emissions. Combined heat and power (CHP) production is an important high-efficiency technology to promote under the emission trading scheme. In CHP production, the production planning of both commodities must be done in coordination. A long-term planning problem decomposes into thousands of hourly subproblems. In this paper, a bi-objective multi-period linear programming CHP planning model is presented first. Then, an efficient specialized merging algorithm for constructing the exact Pareto frontier (PF) of the problem is presented. The algorithm is theoretically and empirically compared against a modified dichotomic search algorithm. The efficiency and effectiveness of the algorithm is justified.
Environmental human-friendliness as a contextual determinant for quality of life
(Elsevier BV, 2006) Horelli, Liisa; Maankäyttötieteiden laitos; Department of Real Estate, Planning and Geoinformatics; Insinööritieteiden korkeakoulu; School of Engineering
The aim of the article is to define some criteria of human-friendly environments and to explain why the concept of environmental human-friendliness (EHF) is important in the analysis and improvement of the quality of people´s lives. EHF is a complex multi-dimensional and multi-level concept that refers to environments or settings which provide support to individuals and different groups so that they can implement their goals or projects, with a potential impact on the subjective well-being. EHF can be described and assessed by an individual criterion (per-son-environment fit) and a group criterion (collective environment fit). A heuristic model of the conditions for EHF is presented that can be applied in the analysis of the context of well-being and in the envisioning phase of the improvement of conditions for the quality of life.
Experimental characterisation of sprays resulting from impacts of liquid-containing projectiles
(Elsevier BV, 2015) Hostikka, Simo; Silde, Ari; Sikanen, Topi; Vepsä, Ari; Paajanen, Antti; Honkanen, Markus; Rakennustekniikan laitos; Department of Civil and Structural Engineering; Insinööritieteiden korkeakoulu; School of Engineering
Modelling and analysing fires following aircraft impacts requires information about the behaviour of liquid fuel. In this study, we investigated sprays resulting from the impacts of water-filled metal projectiles on a hard wall. The weights of the projectiles were in the range of 38–110 kg, with 8.6–68 kg water, and the impact speeds varied between 96 and 169 m/s. The overall spray behaviour was observed with high-speed video cameras. Ultra-high-speed cameras were used in backlight configuration for measuring the droplet size and velocity distributions. The results indicate that the liquid leaves the impact position as a thin sheet of spray in a direction perpendicular to the projectile velocity. The initial spray speeds were 1.5–2.5 times the impact speed, and the Sauter mean diameters were in the 147–344 μm range. This data can be used as boundary conditions in CFD fire analyses, considering the two-phase fuel flow. The overall spray observations, including the spray deceleration rate, can be used for validating the model.
Exploring E-Planning Practices in Different Contexts
(IGI Global, 2012) Wallin, Sirkku; Saad-Sulonen, Joanna; Amati, Marco; Horelli, Liisa; Maankäyttötieteiden laitos; Department of Real Estate, Planning and Geoinformatics; Insinööritieteiden korkeakoulu; School of Engineering
As planners and decision-makers experiment with information and communication technologies (ICTs),it’s important to explore and analyze these attempts in different planning systems and contexts. The aim of the article is to compare the use of and aspirations attached to e-planning in Helsinki, Finland and Sydney,Australia. This comparison will highlight the interrelationship between planning context and its amenability to an e-planning approach and shows there are shared themes in both cases: firstly, the complexity involved in reconciling the aims of the e-planning experiments and their connection to the planning process itself (roles,objectives, implementation of tools and processes). Secondly, the way that e-planning opens up cracks in the façade of administration, and thirdly, the ways in which e-planning provides possibilities to reshape existing planning procedures. The authors argue that the different planning and governance contexts affect the adoption of e-planning and this adoption is necessarily a selective process.

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