Browsing by Subject "Perception"

Now showing 1 - 4 of 4

Die Bedeutung von Werten in Genossenschaften und deren Umsetzung : eine empirische Analyse
(2015) Hill, Sebastian; Doluschitz, Reiner
In this dissertation, we aimed to clarify what values are considered as typical for cooperatives in theory and practice, how the values are applied and realized in practice, and what are their functions and potentials. In the first step, a comprehensive analysis of relevant literature on a national and international level was used to identify which values are seen, in theory, as cooperative-specific values. Based on the results of the literature analysis, a questionnaire was developed and the branch, the size and age of the cooperative as well as the status of the respondents were defined as influencing factors. The questionnaire was sent as a digital quantitative survey to one manager in each of the 844 existing cooperatives in the Baden-Württemberg study region. As a second step, a written (postal) survey was conducted, involving a total of 3,552 members and 707 employees from two Cooperative Banks and Raiffeisen Cooperatives and three Commercial Cooperatives. The evaluation results of the database (from primary and secondary data) show that in scientific literature, cooperative values’ core is described as one that includes the values of democracy, self-help, solidarity, self-responsibility, voluntariness, equality and justice. Some of these values were also mentioned in the results of the empirical survey, whereas the cooperative managers tended to list general values such as reliability, sustainability and fairness, as typical for cooperatives. However, it can be shown that the traditional values still have significant and implicit influence on the legal form of registered cooperatives, and that the previously defined influencing factors have a strong effect on the relevant central values. Although differences could be found between the perception and implementation of cooperative values, a conscious and purposeful communication strategy can have a decisive influence here. The hidden functions and potentials of cooperative values are undisputed in practice, such as the functions of identity and foundation of trust, or discrimination against other types. In addition, the survey shows that in the minds of the managers, members and workers, the cooperative values have social and economic potentials as well as potentials for the marketing of the cooperatives. In summary, it can be said, that the cooperative values are a unique instrument for the cooperatives to promote the legal from of registered cooperatives. It is therefore important to recognize and exploit these potentials to gain a sustainable and successful future not just for the cooperative sector, but also for the whole German society.
Perception for context awareness of agricultural robots
(2018) Reiser, David; Griepentrog, Hans
Context awareness is one key point for the realisation of robust autonomous systems in unstructured environments like agriculture. Robots need a precise description of their environment so that tasks could be planned and executed correctly. When using a robot system in a controlled, not changing environment, the programmer maybe could model all possible circumstances to get the system reliable. However, the situation gets more complex when the environment and the objects are changing their shape, position or behaviour. Perception for context awareness in agriculture means to detect and classify objects of interest in the environment correctly and react to them. The aim of this cumulative dissertation was to apply different strategies to increase context awareness with perception in mobile robots in agriculture. The objectives of this thesis were to address five aspects of environment perception: (I) test static local sensor communication with a mobile vehicle, (II) detect unstructured objects in a controlled environment, (III) describe the influence of growth stage to algorithm outcomes, (IV) use the gained sensor information to detect single plants and (V) improve the robustness of algorithms under noisy conditions. First, the communication between a static Wireless Sensor Network and a mobile robot was investigated. The wireless sensor nodes were able to send local data from sensors attached to the systems. The sensors were placed in a vineyard and the robot followed automatically the row structure to receive the data. It was possible to localize the single nodes just with the exact robot position and the attenuation model of the received signal strength with triangulation. The precision was 0.6 m and more precise than a provided differential global navigation satellite system signal. The second research area focused on the detection of unstructured objects in point clouds. Therefore, a low-cost sonar sensor was attached to a 3D-frame with millimetre level accuracy to exactly localize the sensor position. With the sensor position and the sensor reading, a 3D point cloud was created. In the workspace, 10 individual plant species were placed. They could be detected automatically with an accuracy of 2.7 cm. An attached valve was able to spray these specific plant positions, which resulted in a liquid saving of 72%, compared to a conventional spraying method, covering the whole crop row area. As plants are dynamic objects, the third objective of describing the plant growth with adequate sensor data, was important to characterise the unstructured agriculture domain. For revering and testing algorithms to the same data, maize rows were planted in a greenhouse. The exact positions of all plants were measured with a total station. Then a robot vehicle was guided through the crop rows and the data of attached sensors were recorded. With the help of the total station, it was possible to track down the vehicle position and to refer all data to the same coordinate frame. The data recording was performed over 7 times over a period of 6 weeks. This created datasets could afterwards be used to assess different algorithms and to test them against different growth changes of the plants. It could be shown that a basic RANSAC line following algorithm could not perform correctly under all growth stages without additional filtering. The fourth paper used this created datasets to search for single plants with a sensor normally used for obstacle avoidance. One tilted laser scanner was used with the exact robot position to create 3D point clouds, where two different methods for single plant detection were applied. Both methods used the spacing to detect single plants. The second method used the fixed plant spacing and row beginning, to resolve the plant positions iteratively. The first method reached detection rates of 73.7% and a root mean square error of 3.6 cm. The iterative second method reached a detection rate of 100% with an accuracy of 2.6 - 3.0 cm. For assessing the robustness of the plant detection, an algorithm was used to detect the plant positions in six different growth stages of the given datasets. A graph-cut based algorithm was used, what improved the results for single plant detection. As the algorithm was not sensitive against overlaying and noisy point clouds, a detection rate of 100% was realised, with an accuracy for the estimated height of the plants with 1.55 cm. The stem position was resolved with an accuracy of 2.05 cm. This thesis showed up different methods of perception for context awareness, which could help to improve the robustness of robots in agriculture. When the objects in the environment are known, it could be possible to react and interact smarter with the environment as it is the case in agricultural robotics. Especially the detection of single plants before the robot reaches them could help to improve the navigation and interaction of agricultural robots.
VERZERRT. SCHRILL. GESPALTEN. Meinungsklima und Diskursqualität im Internet und ihre Wirkungen auf den Journalismus
(2022) Fulda, Stefanie; Schweiger, Wolfgang
Journalists play a dual role in shaping public opinion. On one hand, they influence public opinion through their publications. At the same time, they themselves continuously monitor public opinion and orient themselves to it. It seems obvious that the way journalists perceive the world can also influence their work. In fact, it has not yet been studied in terms of the perceived climate of opinion. It is similar with the perceived digital debate culture. Quality, tone and content of online discourses are already widely addressed under keywords such as incivility and hate speech. Effects on journalism are also mentioned, but they don´t focus on how journalists perceive the combined climate of opinion and quality of discourse and how this affects their work. In fact, user comments, individual opinions and opinion leaders are of particular importance to journalists in this perception. Due to the still incomplete state of research on the perception effects of public opinion and discourse quality on journalism, qualitative, guideline-supported interviews were therefore set up on the question "How do journalists perceive opinion climate and discourse quality on the Internet and how does this affect their work?" in order to approach the possible manifestations of this topic in an explorative manner. For these interviews, which lasted 1 - 1.5 hours, 20 journalists from all over Germany were interviewed. The net sample of participating journalists differed according to department, type of employment, age, location, gender, subject areas and degree of position, with the aim of obtaining answers from as many different journalists as possible and being able to compare the answers of certain groups with each other. In addition, a website was created as a central information point for the project. With the help of a repetitive change of perspective in the survey, which addresses the approach and considerations of the interviewees, but also inquires how, from the interviewees point of view, other journalists deal with the same issue, it was possible to identify some hidden perceptual effects. Beginning with the question about the central sources of public opinion perception, via processing and the mechanisms in this process, to the recognizable effects on journalistic work, it was thus possible to trace the path of perception of opinion climate and discourse quality to the effects on journalistic topic selection and topic processing. A key finding of the survey is that it remains unclear to the group of journalists surveyed whether the perceived climate of opinion on the Internet is representative of society as a whole - many do not rule out parallels of digital and general public opinion. At the same time, it is rationally clear to many journalists that they should not be too impressed by the experiences on the Net, since these represent only a small section of society, but emotionally it does happen - because the quality of the experienced, digital discourse is so impressive. On the other hand, almost all of the journalists surveyed assume that the perceived climate of opinion influences their journalistic work, but show a lack of clarity about the extent to which they are personally affected by this in their work. They do not know the concrete effects. Finally, it became obvious that journalists base their perception of public opinion quite significantly on the perceived quality of discourse. This is an understandable approach, but one that harbors the risk of misperceptions due to third person, negativity or false uniqueness effects, to name just a few of the most important potential distortions of perception. This has consequences: If those who report on public opinion are subject to a distorted perception, then they bring this into their reporting, which reinforces the tendency for recipients to also be subject to a distorted perception of public opinion. Citizens, in turn, express themselves in social media or below journalistic articles in the comments. These are read by editorial teams and in turn used for journalistic reporting. This is where the circle closes, because this is how recipients and journalists influence each others distorted perceptions and draw conclusions about public opinion in society. Minority opinions are perceived as majority opinions, the emotionally heated discourse on the Internet shapes the impression of a growing polarization of society, and journalism carries this idea into its reporting. The consequence is a possible misinterpretation of public opinion by journalistic media, so that journalism runs the risk of arguing past the actual public opinion of society through a distorted perception of public opinion and discourse quality on the Internet.
When entrepreneurship becomes a matter of perspective — Four studies exploring the perception of entrepreneurship and entrepreneurs
(2021) Prochotta, Alicia; Kuckertz, Andreas
The belief that entrepreneurship is crucial to address various economic and social problems, like unemployment, has embedded entrepreneurship into mostly political discourses around the world. However, what has often been ignored is the fact that entrepreneurship requires entrepreneurs. Despite its (economic and social) contributions, for instance, very little is known about how appealing entrepreneurship is for individuals, which might be crucial as the attractiveness of entrepreneurship is related to how many individuals choose to become entrepreneurs. In this context, the question also arises of how entrepreneurship and entrepreneurs are generally perceived and understood. What is “entrepreneurial” seems difficult for many to define as different players in society (e.g., policymakers, financers, entrepreneurs, or society as a whole) perceive things differently. Previous research findings show that the mere existence of resources will not translate into the thriving of entrepreneurship in an economy per se as this does not implicate that entrepreneurship and entrepreneurs are favored and encouraged by society or societal actors. Against this background, the present dissertation is guided by the overall research question: What are the perceptions held about entrepreneurs and entrepreneurship by different stakeholders (and entrepreneurs themselves)?