The Diatomic Molecular Spectroscopy Database: Data-science Driven Applications

Spectroscopic constants of molecules characterize the unique fingerprints of molecules and atoms. In particular, for diatomic molecules, spectroscopic constants encapsulate essential information about different applications in atomic, molecular, and optical physics, such as laser cooling or quantum information. To help find molecules well-suited for a given application, we have developed a database linked to an interactive website.\footnote{X. Liu, S. Truppe, G. Meijer and J. P\'{e}rez-R\'{i}os, J. Cheminform. \textbf{12}, 31 (2020)} The spectroscopic constants and Franck-Condon factors can be retrieved in useful formats from the website or via an application programming interface. New data can also be uploaded upon acceptance by the web managers. By applying machine-learning approaches to this dataset, we show that the spectroscopic constants, including the equilibrium distance, harmonic vibrational frequency, and binding energy, are correlated and depend solely on the constituent's groups and periods. Based on these relationships, ground-state spectroscopic constants of polar diatomic molecules can be predicted with a relative error of $<5\%$, whereas the same properties for the A-excited electron state are predicted with an error of $<11\%$.\footnote{X. Liu, G. Meijer and J. P\'{e}rez-R\'{i}os, arXiv:2005.07913 (2020)} Anyone can make these predictions with access to our database, and it does not require any quantum chemistry knowledge. Separately, we construct a database consisting of experimental electric dipole moments of 162 diatomic molecules. We show that the dipole moment of diatomic molecules is related to the constituent atoms' atomic properties, including electron affinity and ionization potential, and molecular properties that describe the force on the electrons at the equilibrium distance.\footnote{X. Liu, G. Meijer and J. P\'{e}rez-R\'{i}os, Phys. Chem. Chem. Phys. \textbf{22}, 24191 (2020)

Simplifying responsible research and innovation – a tool building in societal readiness into research

Researchers and research funders are increasingly seeking to ensure their work is aligned to societal needs and to prevent it from having foreseeable negative impacts, particularly in fast moving and ethically sensitive fields. In this post, Stefan de Jong, Michael J. Bernstein and Ingeborg Meijer, describe their work developing a tool that facilitates researchers and research funders to incorporate responsible research and innovation values into their work

Meijer\u27s Makers

This Innovation Portfolio is the result of a semester long project that examined the role of a regional campus in its community: more specifically, examining how the GVSU Meijer Campus can best integrate into and support its community. The Meijer Campus was originally designed to engage adult learners of the Holland business community. Our team sought out how to reinvigorate the campus through innovating based on this original goal. During the winter of 2017, our team undertook a series of steps to better understand the needs of the Holland community, considering how to design the Meijer Campus to fit those needs. Interviews with stakeholders and secondary research led us to common insights that were then composed into innovations and later prototypes. The final prototype was the Meijer Maker’s Design Lab, a gymnasium for the mind

Analysis of chromosomal copy number aberrations in gastrointestinal cancer

Meijer, G.A. [Promotor]Punt, C.J.A. [Promotor]Ylstra, B. [Copromotor]Nagtegaal, I.D. [Copromotor

Molecular insights in cervical carcinogenesis with emphasis on hTERT

Snijders, P.J.F. [Promotor]Meijer, C.J.L.M. [Promotor]Steenbergen, R.D.M. [Copromotor

Robust process-controller for Nd:YAG welding

A robust process-controller was developed which maintains a fully penetrated weld. This feedback-controller is robust for various process disturbances that may occur, like variations in sheet thickness, welding velocity, focal position, shielding gas variations, etc. The signals from an optical sensor are used to design a so-called "switching" controller, which enables fully penetrated welding at a minimum amount of laser power. It is shown that the working principle of the controller is applicable to different material types, more specific different steels and stainless steels. Experiments have been carried out to show the ability to cope with varying sheet thickness and\ud welding velocity on FeP04 mild steel. Furthermore a method is described which can be used to easily find a good set of control parameters from a single identification experiment

Influence of intensity distribution on the meltpool and clad shape for laser cladding

The influence of the optical system on the laser cladding process is studied, in particular with respect to the burn-in shape: the penetration of the meltpool into the substrate. The beam caustic and intensity profiles for the commonly used out-of-focus laser clad operation are presented and discussed. To avoid the disadvantages of the out-of-focus operation, a novel telezoom optical system is developed, which allows in-focus operation with a sufficiently large focus with a uniform intensity distribution and a spot diameter ranging from 3 up to over 6 mm. Different typical burn-in shapes are indicated, as they can be found in cross sections of experimental clads. The influence of the intensity distribution on the occurring burn-in shapes is discussed, as well as other phenomena that can play a role, such as flow recirculation cells in the meltpool

Mandibular Fracture in Conjunction with Bicortical Penetration, Using Wide-Diameter Endosseous Dental Implants

Prosthodontic rehabilitation of a patient with an atrophic edentulous mandible presents a significant challenge in restoring esthetics and function. The purpose of this clinical report is to describe fracture of an atrophic edentulous mandible opposing maxillary natural dentition in association with endosseous dental implants. The patient received two wide-diameter implants in the anterior mandible for an implant-assisted mandibular overdenture, in which the implants penetrated the inferior border of the mandible for bicortical stabilization. Three months following implant placement surgery, the patient experienced pain, swelling, and intraoral purulent drainage around the right implant. Panoramic radiograph revealed a fracture of the mandible through the right implant site and signs of infection around the left implant. The implants were removed surgically, and open reduction and fixation of the fracture site were undertaken using a titanium bone fixation plate. This clinical report demonstrates that placement of wide-diameter implants in conjunction with bicortical penetration in a severely atrophic edentulous mandible can risk fracture of the mandible.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/79058/1/j.1532-849X.2010.00646.x.pd

Swashplate control system

A mechanical system to control the position of a rotating swashplate is developed. This system provides independent lateral cyclic, longitudinal cyclic and collective pitch control of a helicopter rotor attached to the swashplate, without use of a mixer box. The system also provide direct, linear readout of cyclic and collective swashplate positions