493 research outputs found
Was bleibt. Notizen zur Spuren-Kunst von Harald Priem
No full textBraungart W. Was bleibt. Notizen zur Spuren-Kunst von Harald Priem. In: Lättgen R, Ausstellung Harald Priem. ECHO (2014-2015 : Bielefeld; Siegburg), Zentrum für Interdisziplinäre Forschung, eds. Harald Priem - Echo. Koblenz: Fölbach; 2015: 45-51
Special issues as vertical integration: A rejoinder to Priem and Mowday
No full textIn this rejoinder to Priem and Mowday, the author amplifies and critiques some of their ideas on the proliferation of special issues in management journals. The author interprets special issues as vertical integration moves by journal editors operating in a context of perceived resource scarcity. He also argues that the proliferation of special issues is contributing to the fragmentation of the organization studies discipline, thus contradicting Priem's notion of a command economy of ideas via special issue and Mowday's sanguine view of special issues. The author offers suggestions for future research on the causes and consequences of the proliferation of special issues in management journals
When does managerial ability most affect value creation? Evidence from Factor Markets in feature film production
No full textopenalexR: An R-Tool for Collecting Bibliometric Data from OpenAlex
No full textBibliographic databases are indispensable sources of information on published literature. OpenAlex is an open-source collection of academic metadata that enable comprehensive bibliographic analyses (Priem et al. 2022). In this paper, we provide details on the implementation of openalexR, an R package to interface with the OpenAlex API. We present a general overview of its main functions and several detailed examples of its use. Following best API package practices, openalexR offers an intuitive interface for collecting information on different entities, including works, authors, institutions, sources, and concepts. openalexR exposes to the user different API parameters including filtering, searching, sorting, and grouping. This new open-source package is well-documented and available on CRAN
OpenAlex Author Name Disambiguation V3 Initial Clusters
No full textAuthor name disambiguation V3 initial clusters for the OpenAlex dataset. See https://openalex.org
There are 633803287 rows, split into 4 CSV (comma-delimited) files (with headers).
The CSV files have two columns: "work_author_id" and "author_id"
"work_author_id": An OpenAlex Work ID and an author sequence number, joined with an underscore ("_")
"author_id": An OpenAlex Author ID, representing a unique author in OpenAle
Modular wall-less drift chamber for muon detection at the LHC / H. Faissner, Th. Moers, R. Priem, ... , D. Samm [u.a.]
No full textDetermining the minimum percentage of vehicles equipped with a uCAN necessary to accurately estimate the traffic speed
No full textIn this thesis the use of in-vehicle data, obtained from a uCAN, for the estimation of the traffic speed is investigated. Since vehicles are not equipped with a uCAN yet, the uCAN data is emulated. For this emulation, the traffic simulation model Fosim is used. With the emulated uCAN data, the minimum percentage of vehicles equipped with a uCAN that is necessary to accurately estimate the traffic speed is determined. This minimum percentage is equal to the minimum percentage for which the corresponding estimator for the traffic speed satisfies the accuracy requirement of NDW. The obtained percentage is applied to practical settings to generalize this result from a road section to the highway network of the Netherlands. Since the estimator for the traffic speed, based on data from inductive loop detectors, that is used nowadays does not satisfy the NDW requirement, the necessary minimum percentage of vehicles with a uCAN is also determined for two weaker requirements. The results based on these requirements are also generalized to the Dutch highway network. All three obtained necessary minimum percentages of vehicles with a uCAN for the three requirements also hold in the practical settings.StatisticsApplied mathematicsElectrical Engineering, Mathematics and Computer Scienc
Translocatie van homogene polymeren door een nanoporie
No full textTranslocatie van een ketting met verschillende kraaltjes door een zeer kleine porie kan gebruikt worden als een eerste stap voor het modelleren van het transport van DNA door een membraan. Dit translocatieproces biedt een groot aantal kansen in chemische en biologische processen, zoals het snel kunnen afezen van DNA. Het translocatieproces wordt gezien als een subdiffusie. In dit verslag is de ketting gemodelleerd als een homogeen polymeer. Het standaard model dat gebruikt wordt om het translocatieproces te beschrij-ven, is in essentie moeilijk op te lossen. Er is echter een geïdealiseerd model dat een goede omschrijving geeft van het standaard model. In mijn onderzoek heb ik gevonden dat het geïdealiseerde model net als in het standaard model de subdiffusie omschrijft van een kraaltje aan een polymeer.BachelorMathematicsElectrical Engineering, Mathematics and Computer Scienc
Authority transitions in highly automated vehicles
No full textRelevance - Autonomous cars can offer many benefits and potentially nullify the road accidents caused by human error (94%). One of the threats, however, is the mode transitions between the levels of automation. In a highly automated vehicle (level 4), the vehicle can drive completely autonomous, but only during a defined use case after which the user has to take over. This leads to sudden changes in workload which can be detrimental to driving safety. The current designs do not acknowledge these safety issues yet. Therefore the goal of this project is to design a system where the transitions to and from autonomous driving in a highly automated car are comfortable and safe. The project is executed in collaboration with the design agency VanBerlo. Literature study - A literature study led to the identification of seven human-factors issues that affect the transitions between levels of vehicle automation, expected to emerge between 2020 and 2032: Vigilance decrements, complacency, manual skill decay, motion sickness, loss of situational awareness, predictability of the car and mode transitionsFor automated driving, being a new development, it seems recommendable that the design should focus on building trust with the system and creating a built-in co-pilot that supports the driver in the new, more complex cockpit.These different automation modes have been divided in assisted driving and autonomous driving with the difference being that in the latter one the system is responsible. In assisted driving, automated features like adaptive cruise control (ACC) and lane keeping can still be used making the system more complex. During autonomous driving, three measurable user states have been defined. Different studies show it takes 30-5 minutes from a sleeping state, 40 seconds from an inattentive state and 8 seconds from an attentive state to get back to the right driving performance level. Field research - A test ride with a partial-automated vehicle (Tesla model S) shows minimal feedback from the automated features which leads to confusion. Also, trust was a reoccurring issue emphasised during this ride. Observing six students of a driving instructor during the lessons show unsolved issues in planning, traffic rules and communication. Calm, clear and structured feedback from the instructor was favoured. The driving instructor emphasises the importance of communication to other road users. Design goal - The research concludes in the design goal: ‘Make the transitions between fully automated and assisted driving safer by increasing the situational awareness when needed, re-engaging driver vigilance, avoiding mode confusion and establish trust with the system.’ Design - During assisted driving the HUD shows in combination with augmented reality what the status is of ACC and lane keeping and visualises their functionality to prevent confusion. Levers behind the steering wheel are used to control these features. Holding both activates autonomous driving. The steering wheel provides haptic feedback to indicate the take over after which it retracts as a strong symbolic message of giving the steering wheel to the system.A framework is designed based on the literature research to facilitate the transition back to assisted driving where situational awareness and driver vigilance increase stepwise before a take over. Haptic feedback in the seat emphasises and pushes the user in the desired user state. If the desired user state is not met afterwards, auditive feedback is used to warn the user until the user state is met. These modalities are always combined with visual feedback to make the message clear. Holding both levers again initiated assisted driving. The steering wheel comes back as a symbolic message of taking the wheel and provides haptic feedback at the point of take over. Evaluation - A qualitative study with an interactive prototype, potential users and experts on automated driving is done to evaluate the design. It shows that the feedback modalities of the design work to facilitate the transitions. It is expected, however, that the steering wheel is presented back to the user in an earlier stage to initiate the take over. It remains unclear how the augmented elements work to facilitate ACC and lane keeping. Next steps should be to evaluate the design further and design a system that communicates with other road users and add more functionality to the retracting steering wheel.Design for Interactio
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