| 1. |
- Aldenlöv, Jens
(författare)
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Exploring Public Procurement of Swedish Railway Infrastructure Maintenance
- 2019
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In 2002, Sweden started to outsource its railway infrastructure maintenance. Through gradual exposure (i.e. outsourcing one contract area at a time), the Swedish Transport Administration has developed its competence of being a client towards its contractors. The last contract was outsourced in 2014. In the last decade, the development of governance techniques and maintenance cost has not matched the increase in traffic. Due to an increased awareness in environmentally friendlier transportation, traffic is only expected to increase further in the coming years. Governance techniques and maintenance cost ultimately depends on the client-contractor relationship through public procurement. Hence, there is a need to understand public procurement of railway infrastructure maintenance. Therefore, the purpose of this thesis is to contribute to the knowledge of public procurement of railway infrastructure maintenance. Three separate studies were conducted. Study 1 was a literature review to explore and determine the state-of-the-art for the field of public procurement of railway maintenance. Study 2 was a linear regression analysis to examine the relationship between contract design and the output of maintenance in Sweden. Study 3 was an interview study in Sweden that explored what factors that supports or hinders collaboration in railway maintenance.The main results of these studies are that asset knowledge is important for both the client and the contractor. Through reliable asset knowledge, incentives and contracts can be designed to support governance and collaboration. Today, railway infrastructure maintenance is dominated by informal relationships that lack the support of formal partnering activities. When an informal relationship is supported by a formal structure it provides a basis for innovation. This formal structure should be centralized around gaining and sharing asset knowledge. By establishing such a system to increase the asset knowledge and supporting collaboration, public organizations of maintenance can provide a basis for the improvement of maintenance.
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| 2. |
- Granheimer, Klara, 1989-
(författare)
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Public procurement of engineering services : Task characteristics, control modes and effects on adaptability
- 2022
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Previous research has emphasized the importance of engineering services and adaptability in the early stages of construction projects. Public clients usually procure engineering services from private companies, which makes their procurement strategies important in creating incentives for adaptability and innovation for the service providers. Due to the high uncertainty and clients’ lack of understanding of the tasks they procure, the procurement of services is argued to be challenging – especially for public clients. Despite this, studies on the procurement of engineering services are scarce, as is research on the effects on adaptability. The purpose of this thesis, therefore, is to increase the understanding of organizational control in the public procurement of engineering services, by focusing on task characteristics, control modes and their effects on adaptability.A single case study of the Swedish Transport Administration was analyzed using the three models developed in the appended papers, i.e., the expanded control model, the procurement model for services and the classification model. The empirical data, consisting of interviews, observations and documents, were analyzed using visual mapping and flexible pattern matching.The findings illustrate that uncertainty is the task characteristic that differs between the early phase of construction (i.e., physical planning) and subsequent stages (i.e., tender document), while knowledge of the transformation process is the task characteristic that differs between a standard contract and an environmentally sustainable contract. Thus, when procuring engineering services including carbon reduction goals where new solutions are needed, new procurement strategies are necessary. In order to cope with the high uncertainty and low knowledge of the transformation process, social control is preferable. In addition, using social control will enhance the service providers’ willingness to adapt. These findings are important in the procurement of engineering services because uncertainty and the client’s understanding of the tasks are two of the main aspects that make engineering services difficult to procure.By combining task characteristics, control modes and their effects on adaptability, this thesis illustrates the importance of focusing on the entirety of organizational control. For example, even though process control and social control both incentivize the service provider to adapt to change, process control is less suitable for a public client when uncertainties are high. In addition, when choosing control modes related to the specification and reward system, it seems more efficient to provide the same incentives (i.e., process control may be combined with social control), whereas output control should not be combined with any other control mode. This shows the importance of combining the three variables and that the three main models of this thesis can be important tools. This knowledge and the models may therefore be useful to academics as well as practitioners. The results contribute to the scarce research on the procurement of engineering services for construction projects, as well as to the control literature.
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| 3. |
- Janné, Mats, 1979-
(författare)
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Construction Logistics in a City Development Setting
- 2020
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- With the current urbanization trend, there is an increased need for city development, i.e. to build apartment buildings, hospitals, schools and infrastructure in cities and urban areas to meet the rising demands. At the same time, land is increasingly seen as a finite resource. This has led to the regeneration of decommissioned industrial-use land for development purposes. This means that multiple individual construction projects are being built in the same or nearby areas during the same time-period. However, the end products of construction projects are produced at their place of consumption, which means that large quantities of materials and resources need to be delivered to, and removed from, each construction site. This leads to new transport flows being created in connection to city development. These transport flows need to be coordinated to ensure efficient construction productivity and reduce the transports’ environmental and social impact on the urban transport system. At the same time, it is important to ensure that construction sites can be managed from a logistics perspective without impairing efficiency due to the challenges of building in urban environments.One way of managing logistics to and from construction projects in city development is through so-called construction logistics setups (CLS). However, the implementation of CLS’s affect many different stakeholders and the interorganizational relationships between them. The implementation of CLS’s therefore faces three challenges; management of transport to and from construction sites, management of logistics at construction sites, and managing the interorganizational relationships amongst construction project stakeholders. The development of CLS’s is often undertaken by mimicking previous setups as there is currently no guiding procedure for developing and implementing CLS’s. To reduce the ad hoc approach to developing and implementing CLS’s, the purpose of this dissertation is to propose a framework for developing construction logistics setups. The purpose is fulfilled with the aid of the following four research questions:RQ1: Taking the perspectives of different stakeholders’, why are CLS’s implemented?RQ2: What type of CLS services are offered?RQ3: How can performance effects of CLS’s be measured?RQ4: How do CLS’s affect the identified challenges of managing the transports to and from construction sites, managing logistics at construction sites, and managing the interorganizational relationships amongst construction project stakeholders?To answer the research questions, three main methodologies have been used; literature reviews to inform the background of the studies and develop analytical frameworks, and case study and Delphi research for the empirical studies. In fulfilling the research purpose, the findings of this dissertation suggests that when developing a CLS, three activities need to be considered; 1. setting the scope of the CLS, 2. deciding on the structure of the CLS, and 3. managing the interorganizational relationships of the CLS. These activities are the foundation of the developed framework. The contents of the activities were derived through the research questions.When answering RQ1, it was found that contractors implement CLS’s to ensure construction productivity, developers implement CLS’s to reduce disturbances to businesses and residents nearby, and municipalities implement CLS’s to reduce disturbances to third-parties and to reduce the impact from construction logistics on the urban transport system. These stakeholder drivers for implementing CLS’s will impact the scope of the CLS. Furthermore, the scope of the CLS was found to be dependent on both the contextual considerations of the CLS in terms of physical context at site and in terms of what is being built, as well as the organizational context in terms of what stakeholders are part of the project, where in the hierarchy the CLS is located, and what level of mandate the CLS has. The scope will also set the terms for how transports are managed through the CLS. If for instance there is limited space at site, this can imply that time-planned deliveries are favoured. In answering RQ2, it was found that as a consequence of what transport management approach is chosen, the structure of the CLS will differ. This dissertation shows that asset-based setups are similar to traditional logistics outsourcing and TPL in which physical distribution services are offered. Non-asset based services on the other hand act more as supply chain orchestrators similar to fourth-party logistics service providers. In these cases, supplied services are aimed more at ensuring that the right services and capabilities can be procured for the CLS. One value-adding service that was found crucial to include in CLS’s is a joint booking and planning system. Having this type of support systems will allow the CLS to coordinate the different stakeholders connected to the CLS. Related to the structure of the CLS, RQ3 suggest that performance needs to be monitored for deliveries, on-site logistics, and the coordination of logistics activities on and off site. The performance monitoring needs to be developed from a logistics point-of-view, taking into consideration the different stakeholders’ perspectives. Finally, in answering RQ4, it was found that a CLS can affect the identified challenges positively. In essence, a CLS aims at managing construction logistics and if developed and implemented from this notion, transports to and from site as well as on-site logistics management can become more efficient. Additionally, the dissertation shows that CLS’s can help in managing the interorganizational relationships within the construction project(s). However, this builds on the notion of having well-developed and communicated service offerings and regulations, e.g. through business and governance models. It was also found that the activities of the framework are interrelated and dependent on one another, suggesting that developing construction logistics setups is an iterative process. The proposed framework should thus be seen as a guideline for how to develop the setup, allowing for adaptations of the setup to the context for which it is developed.
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| 4. |
- Rosander, Lilly
(författare)
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Adhocracy in the Bureaucracy : Practices of implementing collaborative contracting in infrastructure client organizations
- 2024
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The building of infrastructure is a capital and resource-demanding activity, generally carried out in large interorganizational projects. Most infrastructure clients are public entities, implying that contracting processes are governed by public procurement regulations. Many infrastructure projects have high requirements for sustainability, both regarding impact on the local environment and the climate footprint. In addition to this, the construction often takes place in urban areas. To manage this complexity and uncertainty it has, over the past decades, become more common for public clients to apply procurement strategies that aim at fostering a good collaboration and integrate processes between client and contractor. Despite examples of advantages with such collaborative contracting the results vary and the institutionalization of collaborative contracting practices has proven difficult. Additionally, concepts and models vary between contexts and are hard to compare. How clients develop their procurement strategies and project practices, therefore, merits close attention. When the public sector uses procurement as tools to achieve their strategic goals, it is reasonable to analyze such decisions and processes as cases of policy implementation. Still, however, a large part of existing research on procurement of collaborative contracting focuses on a single project. By directing focus toward the organization as a whole, and on the implementation process of procurement strategies in several projects over time, the thesis aims to increase the understanding of how new organizational practices develop at different levels in public project-based organizations.The empirical foundation of the thesis is a longitudinal case study that follows the implementation of a new procurement strategy in the Swedish Transport Administration over seven years. The material includes data from seven projects that all used a two-stage Early Contractor Involvement model (called High collaboration). The case also includes material from the permanent organization, mainly in the Purchasing department. The five papers in the thesis analyze the implementation process from several perspectives, with specific attention to the characteristics of the organization as both public and project-based and how these features influence routines, legitimacy, learning and collaboration at different levels. The study adopts a practice perspective where interviews and observations focus on the actions and experiences of the individuals in the study. The result shows that there is a strong project autonomy, which is reinforced both by the project-based structure and by the public character of the client organization. Subsequently, there are few overarching structures at the central level to develop routines and procurement strategies in collaboration with the projects and suppliers. Thus, project managers have had a great influence on the finalization of project-specific procurement models and experiences has principally been shared between individuals, resulting in large variations between projects and limited organizational learning. Nonetheless, decisions in the permanent organization still influence the conditions at the operational project level, by dedicating resources and focusing attention on the topmanagement priorities. At the central level, collaborative contracting, as a concept has had varying legitimacy over time, and the initial problems in some of the seven projects gained considerable strategic importance by reinforcing such pendulum movements. Legitimacy seeking at higher organizational levels has also contributed to a variation in concepts and models, further complicating structured learning in the field of collaborative contracting.The thesis contributes to the construction management literature by providing deeper insights into why procurement models and collaborative practices vary between projects. Furthermore, the results contribute to project studies by expanding the understanding of how the specific character of public project-based client organizations impacts on learning processes for collaborative contracting. Finally, the thesis is relevant for public procurement research, as well as for practitioners in infrastructure and public procurement, since it provides novel insights into how the project-based nature of anorganization affects implementation and procurement processes.
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| 5. |
- Tossavainen, Erik, 1977-
(författare)
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In the hands of ohm : hemodynamic aspects in pulmonary hypertension
- 2019
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Congestive heart failure (CHF) is one of the most challenging diseases in terms of health care demand and mortality, in the western world. Despite major breakthroughs in the fields of diagnosis and treatment over the three last decades, the management of CHF still remains challenging.CHF is defined as inability of the heart to supply sufficient blood flow to meet the needs of the body. This definition however, may be an oversimplification of a complex pathophysiological process since patients with overt CHF may have normal, or even supernormal cardiac output at the expense of increased filling pressures, which subsequently leads to the development of post capillary pulmonary hypertension (PH). In the presence of advanced CHF, clinical signs and symptoms are obvious at rest. However, the majority of affected individuals do not experience any discomfort at rest and may demonstrate normal findings when assessed. Small increases in systemic blood pressure and or venous return, caused by activity may result in severe elevation of filling pressures if left ventricular compliance is significantly decreased. This example highlights the need to perform cardiac investigations during stress to provoke symptoms. Increased pulmonary vascular resistance (PVR), commonly found in pre-capillary PH, is a condition that shares many symptoms with CHF, and is also associated with poor prognosis. Even though the disease is located within the lung vessels, it is highly important and challenging task differentiating pre- and post-capillary PH. Since treatment differs considerably and may be detrimental in case of misdiagnosis, additional sensitive and reliable screening methods are crucial to aid in differentiation.Methods: Out of the four studies included in this thesis, three were conducted solely at Norrland’s University Hospital, while patients in the third study were recruited and examined at Uppsala Akademiska Hospital. All included patients had idiopathic dyspnea and were admitted for right heart catheterization (RHC), which is gold standard with regards to hemodynamics. Echocardiographic examinations were performed simultaneously with RHC, except in the Uppsala study, wherein echocardiography were performed within 3 days to the RHC.Echo-Doppler derived pulmonary artery acceleration time (PAcT) is an easily assessed parameter, indicating elevated pulmonary artery systolic pressure (PASP) and pulmonary artery resistance (PVR). PAcT was tested as a screening method for identification and differentiation of pre and post- capillary PH in a cohort of 56 patients (study 1).The ability to calculate PVR non-invasively, using novel echocardiographic measurements, was made by replacing the invasive pressure and flow components that constitutes the foundation of the PVR = (mean pulmonary artery pressure – Pulmonary capillary wedge pressure (PCWP)) /cardiac output), with novel echocardiographic measurements. PVR = mPAP-Chemla – Left atrial strain rate during atrial systole (LASRa) / Cardiac Output-Echo (study 2).Invasively measured left ventricular filling pressure in response to passive leg lifting, and its ability to predict pathological increase in left ventricular filling pressures during supine bicycling, was tested in a population of 85 patients with normal left ventricular ejection fraction (LVEF) and suspicion of CHF based on NT-proBNP levels alone were investigated (Study 3).Finally, an evaluation of standard and novel Doppler echocardiographic parameters, potentially useful in identifying patients who may develop increased filling pressures during passive leg lifting (PLL), was carried out (study 4).Results:Study 1: PAcT correlated negatively with pulmonary artery systolic pressure (PASP) (r = -0.60, p < 0.001) and PVR (r = -0.57, p < 0.001). PAcT of <90 ms had a sensitivity of 84% and a specificity of 85% in identifying patients with PVR ≥ 3.0 WU. Regardless of normal or elevated left sided filling pressures, PAcT differed significantly in patients with normal, compared to those with elevated levels of, PVR (p < 0.01). A significant difference was also found on comparison of the PAcT/PASP ratio (p < 0.01), with a lower ratio among patients with PVR ≥ 3.0. WU.Study 2: We prospectively used Doppler and 2D echocardiography in 46 patients with sinus rhythm which revealed that left atrial strain rate during atrial systole (LASRa) had the highest significant positive correlation with PCWP (r2 = 0.65, P < 0.001). By adopting a linear line of best-fit, LASRa may therefore be substituted for PCWP. Subsequently, LASRa was substituted into the PVR equation. This novel echocardiographically derived PVR calculation, significantly correlated with RHC generated PVR values (r2 = 0.69, P < 0.001) and minor drift (+0.1WU) when assessed by Bland Altman analysis.Study 3: Only 22% (11/51) of patients with elevated NT-proBNP had PCWP above normal levels at rest. However, in response to PLL, 47% of patients developed elevated PCWP, and the majority of this 47% subsequently developed pathological pressure levels while performing supine cycling exercise. Thus, the likelihood of developing high LVFPs during exercise could be determined by PLL, with a sensitivity and specificity of 90%.Study 4: At rest, left atrial volume indexed to body mass index (BMI) (LAVI) and mitral deceleration time (DT) were independently related to PCWP during PLL. However, during PLL univariate regression analysis revealed LASRa (β = -0.77, P <0,001) and E/LVSRe (β = 0.47, P < 0,021) most related to PCWPPLL. Multiple regression analysis fortified LASRa and E/LVSRe as relevant independent parameters useful in the assessment of filling pressure during PLL.Conclusion: A PAcT < 90ms is strongly suggestive of increased PVR (>3.0 WU). Based on study 1, there is clear evidence suggesting that these findings apply irrespective of LVFPs. PAcT can potentially serve as a rapid screening tool for estimation of PVR, however, is not useful if the exact level of PVR is required. In this case, an established PVR calculation method is preferred, and could be performed with higher precision by inclusion of echocardiography derived LASRa as a surrogate measure of PCWP. Insufficient LV compliance results in the inability to cope with increased cardiac preload. Nt-proBNP is secreted when the myocardium is stretched, however only a small portion of patients within the CHF group (study 3) had a high PCWP at rest. Nearly half of the study population with elevated NT-proBNP showed increased PCWP during PLL, which is indicative of underlying ventricular stiffness. By performing this preload increasing maneuver, patients predisposed to developing high filling pressure during supine cycling could be identified with high sensitivity and specificity. Echocardiography, in comparison with RHC, is more accessible, safer and requires less resources and time, thus is an appealing option in the quest to identify additional, non-invasive methods reflective of invasive pressures, which could be useful in the assessment of filling pressure during different loading conditions. LAVI at rest, LASRa and E/LVSRe during PLL, proved independently related to PCWP during PLL.
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| 6. |
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| 7. |
- Candel, Melissa, 1994-
(författare)
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Co-Developing Sustainability Requirements : Exploring client and municipal perspectives in housing development
- 2020
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Construction has major environmental, social and economic impacts. Improving sustainability both during and after the construction process is widely discussed among a slew of practitioners, governments and researchers. Construction clients, such as housing developers, are considered key actors for change and innovation because of their position to set requirements when procuring construction projects. The process of developing project requirements has therefore mainly been studied during the construction clients’ procurement process. At the same time, municipalities use their position as land owners to drive sustainable development. Land allocation agreements allow municipalities to set project-specific sustainability requirements for construction projects on municipal land. The purpose of this thesis is to explore how municipal sustainability requirements affect housing developers when planning and designing their projects.The research is based on a single empirical case study of an urban development programme comprising multiple parallel and sequential housing construction projects. In this study, the municipality’s and housing developers’ perspectives are explored. The results demonstrate that the housing developers perceive several barriers to implementing municipal sustainability requirements. The three main barriers that were identified are reduced flexibility coupled with uncertainty, conflicting interests coupled with reduced autonomy and interdependencies, and a lack of trust and transparency coupled with interdependencies. The municipal sustainability requirements are initially developed by the municipality for the land allocation agreement. They are then co-developed further by the municipality and the housing developers together through negotiations before being finalised in conjunction with the developers’ procurement process.The study is focused on the period following the housing developers’ signing of land allocation agreements with the municipality and before starting their procurement process. During this period, the housing developers attempt to negotiate municipal sustainability requirements that they anticipate will increase costs, risk and uncertainty and decrease the value of their final product. Negotiations between the housing developers and the municipality can be viewed as value co-creation processes stimulated by functional conflict. These findings build on three papers that are included in the thesis.Contributions are made to literature on the role of construction clients and their perceived barriers to implementing and developing sustainable construction solutions and practices and barriers to change in general. Theoretical contributions are also made to literature on value co-creation in construction by illustrating how clients engage in the co-creation of value with municipalities and other clients. Finally, the theoretical link between value co-creation and functional conflict is studied and developed.
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| 8. |
- Ekeskär, Andreas, 1984-
(författare)
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Exploring Third-Party Logistics and Partnering in Construction : A Supply Chain Management Perspective
- 2016
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The construction industry is associated with problems such as low productivity and high costs. This has been highlighted in several government-funded reports in both Sweden and in the UK during the course of over two decades. The construction industry is a large industry sector employing hundreds of thousands and a large contributor to a country’s GDP. The problems therefore have a large impact on society. Some of the problems are rooted in the organizational structure of the construction industry. Compared to other manufacturing industries, the construction industry is organized in temporary organizations. The temporary organizations cause temporary supply chains, fragmentation among construction industry actors and adversarial relationships between those actors. Partnering has been but forward as a solution to overcome the temporariness and the adversarial relationships in the construction. Another solution to mitigate the problems suggested in the reports is supply chain management (SCM). Both concepts have been taken from the manufacturing industries and partnering has been more successful compared to SCM in the construction industry. In the construction industry the progress towards SCM has focused on logistics. In recent years dedicated third-party logistics (TPL) solutions have emerged in the Swedish construction industry, where a company is hired to manage the logistics in a construction project.The purpose with the research presented in this licentiate thesis is to explore how client initiated TPL solutions and partnering can be facilitators for SCM in the construction industry. Being a new phenomenon in the construction industry TPL solutions provide a logistical competence not necessarily included in a traditional construction project. Therefore, TPL solutions are of particular interest when studying the realization of SCM in the construction industry. In the process of realizing SCM in the construction industry, the construction clients have been put forward as having a crucial and important role. The clients are the initiator and funder of construction projects and as such the client can influence the course of a construction project. Therefore, it is of interest to study how the client can take an active role in this process. Initiating a TPL solution in a construction project is one way for a client to take an active part in the realization of SCM in construction.However, in order to study how clients can take an active role towards the realization of SCM in the construction industry, there have to be an understanding of how SCM is to be adopted to the construction industry context. SCM that derives from the manufacturing industry is designed to be used in long-term relationships with permanent organizational structures. The construction industry on the other hand is associated with short-term relationships and a temporary organizational structure. Partnering that is designed to mitigate the temporariness and establish long-term relationships have been quite successful in the construction industry, and could therefore be used as a facilitator for SCM in construction.To study the use of client initiated TPL-solutions in construction and the realization of SCM in the construction industry the following research questions have been addressed:RQ1: To what extent can a third-party logistics solution be a facilitator for client driven SCM in the construction industry?RQ2: How will upstream and downstream tiers be affected when a thirdparty logistics provider is used in a construction project?RQ3: How can partnering be used a mean to facilitate the realization of SCM in the construction industry?To answer the research questions two main methodologies have been used; case study for the empirically grounded research and conceptual studies for the analysis of the case studies as well as for comparing the two concepts of partnering and SCM. All questions have been grounded in literature and previous research. The findings of this research is therefore grounded in both theory and in practice. The main findings of this research is that TPL solutions are not a quick fix for realizing SCM in the construction industry. However, if used right a TPL solution can be an effective tool to address logistical issues in a construction project and to establish an interface between the supply chain and the construction site. By initiating a TPL solution the client addresses the importance of logistical competence in a construction project. A TPL solution does not have a purpose of its own; a TPL solution is a service function to the construction project, providing expertise on logistics management. There are also a number of driving forces and concerns that have been identified, if they are addressed prior to a TPL solution is implemented, the likelihood of its success will increase.Furthermore, both partnering and SCM rely on high trust and share several key components and issues that have to be addressed. Partnering on strategic level with several suppliers included can even be hard to distinguish from SCM. Wherefore, partnering is considered a facilitator for the realization of SCM in construction. By addressing the necessary issues in both concepts a good foundation for SCM is established.
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| 9. |
- Ekström, Erik, 1989-, et al.
(författare)
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Epitaxial Growth of CaMnO3-y Films on LaAlO3 (112 over bar 0) by Pulsed Direct Current Reactive Magnetron Sputtering
- 2022
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Ingår i: Physica Status Solidi. Rapid Research Letters. - : Wiley-V C H Verlag GMBH. - 1862-6254 .- 1862-6270. ; 16:4
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Tidskriftsartikel (refereegranskat)abstract
- CaMnO3 is a perovskite with attractive magnetic and thermoelectric properties. CaMnO3 films are usually grown by pulsed laser deposition or radio frequency magnetron sputtering from ceramic targets. Herein, epitaxial growth of CaMnO3-y (002) films on a (112 over bar 0)-oriented LaAlO3 substrate using pulsed direct current reactive magnetron sputtering is demonstrated, which is more suitable for industrial scale depositions. The CaMnO3-y shows growth with a small in-plane tilt of <approximate to 0.2 degrees toward the (200) plane of CaMnO3-y and the (1 over bar 104) with respect to the LaAlO3 (112 over bar 0) substrate. X-ray photoelectron spectroscopy of the electronic core levels shows an oxygen deficiency described by CaMnO2.58 that yields a lower Seebeck coefficient and a higher electrical resistivity when compared to stoichiometric CaMnO3. The LaAlO3 (112 over bar 0) substrate promotes tensile-strained growth of single crystals. Scanning transmission electron microscopy and electron energy loss spectroscopy reveal antiphase boundaries composed of Ca on Mn sites along and , forming stacking faults.
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| 10. |
- Eriksson, Per Erik
(författare)
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Videography as Design Nexus : Critical Inquires into the Affordances and Efficacies of Live-action Video Instructions
- 2018
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis is about live-action instructional videos (LAVs). By addressing design problems with respect to the how-to video genre, the thesis asks fundamental questions about mediated instructional communication efficacies and the factors that either obstruct or augment them. The analysis presented in this thesis is based on the notion that videography is a design nexus and key focal point of the connections that make live-action video instructional efforts possible. This Design Nexus is explored by defining and illuminating key ontological dimensions, medium specificities and the video users’ cognitive capacities. This is to acknowledge that the users of instructions in this thesis are center stage, both as biological and cultural beings.The methods used in this thesis and its associated papers are eye-tracking, video observations, questionnaires, self-reports, focus group interviews and YouTube analytics. Hence, both numerical data and non-numerical data are analyzed in this study.The results of the analyses indicate that pre-production planning is key in live-action video instructional endeavors, but not at the expense of the videographer’s status as designer. Moreover, the analyses show that users’ cognitive processing and visual decoding depend on the power of the live-action format to show actual human behavior and action. Other presented evidence seems to infer that LAV-instructions are a little less demanding if users apply a focused decoding style when interacting with them. Nevertheless, physiological engagement of this kind is likely not to fully compensate for users’ psychological engagement.This thesis contributes to a more comprehensive understanding of humans’ abilities to interpret the actions of others via medial means. By relating this to video medium-specific affordances, this thesis also furthers important efficacy distinctions and boundary conditions. This understanding is considered important for live-action video makers and designers of visual instructions as well as scholars who need to develop better methods to assess users’ behavioral engagement when they interact with digital instructional media.
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