Monitoring Directed Energy Deposition Processes in Additive Manufacturing

The purpose of this study is to find out how laser based Directed Energy Deposition processes can benefit from different types of monitoring. DED is a type of additive manufacturing process, where parts are manufactured in layers by using metallic powder or metallic wire. DED processes can be used to manufacture parts that are not possible to manufacture with conventional manufacturing processes, when adding new geometries to existing parts or when wanting to minimize the scrap material that would result from machining the part. The aim of this study is to find out why laser based DED-processes are monitored, how they are monitored and what devices are used for monitoring. This study has been done in the form of a literature review. During the manufacturing process, the DED-process is highly sensitive to different disturbances such as fluctuations in laser absorption, powder feed rate, temperature, humidity or the reflectivity of the melt pool. These fluctuations can cause fluctuations in the size of the melt pool or its temperature. The variations in the size of the melt pool have an effect on the thickness of individual layers, which have a direct impact on the final surface quality and dimensional accuracy of the parts. By collecting data from these fluctuations and adjusting the laser power in real-time, the size of the melt pool and its temperature can be kept within a specified range that leads to significant improvements in the manufacturing quality. The main areas of monitoring can be divided into the monitoring of the powder feed rate, the temperature of the melt pool, the height of the melt pool and the geometry of the melt pool. Monitoring the powder feed rate is important when depositing different material compositions. Monitoring the temperature of the melt pool can give information about the microstructure and mechanical properties of the part. Monitoring the height and the geometry of the melt pool is an important factor in achieving the desired dimensional accuracy of the part. By combining multiple different monitoring devices, the amount of fluctuations that can be controlled will be increased. In addition, by combining additive manufacturing with machining, the benefits of both processes could be utilized.

Commercial blog communication and brand image

The aim of this thesis was to examine whether company initiated commercial communication in personal blogs has an effect on consumers’ brand image. A detailed picture of the main topics was built based on the previous academic literature. The study explores how sponsored and company-initiated blog postings influence consumers’ brand image with a qualitative research. A framework defines the link between the main concepts of commercial blog communication and how this can be used in order to reach positive results in relation to consumers’ brand image. The findings of this study demonstrate that if the tech-savvy consumers consider that the commercial blog communication is genuine and the blogger stands behind the recommendation of the blog posting, it will result on a more positive brand image. However, if the consumers consider the content of the blog posting to be too controlled by the company, it is automatically seen as an advertisement instead of a recommendation by someone trustworthy. The company-controlled commercial blog communication without presenting the personality of the blogger has negative effects on brand image.

Corporate green image communication through public disclosures and social media

Today, companies need to mind the environment in all their actions. Policies, regulations and growing pressure from environmentally conscious public are driving corporations to invest increasingly in their green images. Communication plays a key role in forming and maintaining that image. This thesis explores how six selected companies communicate about their environmental efforts and activities, and its linkage to their green images, in annual and sustainability reports and in Facebook. The companies come from the U.S. and Europe and operate in three different industries: ICT, oil and gas, and aerospace & defense. Qualitative and quantitative content analyses are conducted to examine 36 reports and 121 Facebook messages, collected from the period of 2010-2014, and from 2005 for comparison. The results show that although the quality and quantity of environmental disclosure is increasing, there is still room for improvement. Overall, disclosure in the ICT sector is on the highest level. The European companies disclose more and on average have stronger green images than the American ones. Emissions and ways to reduce them is by far the most covered topic in both continents and in all three industry sectors. The messages in Facebook are closer to advertising, and overall the platform is utilized surprisingly little.

Internal communication during an organizational change: An ethnographic case study

This study discusses the importance of internal communication during organizational change of a case study company X. The purpose of this study is to find out how to use internal communication effectively during organizational change. This study is an ethnographic cade study where a unique case of an organizational change was chosen as the research object. The theoretical background of this study consists of literature relating to the concepts of communication, organizational communication, organizational change, change management and communication of change. The empirical research conducted for this study is based on an ethnographic research method where data was collected through participant observation, informal interviews and field records in the form of a research diary. The research data was collected between September and December 2015. During this period the researcher was working within the case study organization while observing the internal communication during the organizational change process. Triangulation was used to analyze the research data in order to build a united and theoretical picture of the topic. The study finds that without clear internal communication strategy the effectiveness of communication is ought to be poor, which may lead to resistance of change, lack of trust and lower level of overall job satisfaction. Moreover the study findings highlight the importance of managerial presence during an organizational change process and consistency in using formal and informal communication and utilizing multiple communication channels. Based on the findings of this research the study suggests that during an organizational change process a clear internal communication strategy should be carefully planned and executed. The goals of internal communication should be clearly stated and communicated to the company’s employees. The findings of this study enhance importance of managers promoting sense of belonging, developing awareness of the overall change process and contributing to the manager employee relationships and trust. In addition this study points out the key factors that should be included in the internal change communication strategy which are how to ensure that the communications, both vertical and horizontal, are constant. Future research is however necessary in order to gain a more comprehensive view of the research and wider perspective of the case study. Nevertheless, this study deepens the understanding of how to use internal communication effectively during organizational change.