@article{WedrowskiBruyndonckxTavernieretal.2009, author = {Wedrowski, M. and Bruyndonckx, P. and Tavernier, S. and Zhi, L. and Dang, J. and Mendes, P. R. and Perez, J. M. and Ziemons, Karl}, title = {Robustness of neural networks algorithm for gamma detection in monolithic block detector, positron emission tomography}, series = {2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC)}, journal = {2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC)}, isbn = {1082-3654}, pages = {2625 -- 2628}, year = {2009}, abstract = {The monolithic scintillator block approach for gamma detection in the Positron Emission Tomography (PET) avoids estimating Depth of Interaction (DOI), reduces dead zones in detector and diminishes costs of detector production. Neural Networks (NN) are very efficient to determine the entrance point of a gamma incident on a scintillator block. This paper presents results on the robustness of the spatial resolution as a function of the random fraction in the data, temperature and HV fluctuations. This is important when implementing the method in a real scanner. Measurements were done with two Hamamatsu S8550 APD arrays, glued on a 20 {\~A}— 20 {\~A}— 10 mm3 monolithic LSO crystal block.}, language = {en} } @article{WeemstraEilmannSassKlaassenetal.2013, author = {Weemstra, Monique and Eilmann, Britta and Sass-Klaassen, Ute G. W. and Sterck, Frank J.}, title = {Summer droughts limit tree growth across 10 temperate species on a productive forest site}, series = {Forest Ecology and Management}, volume = {2013}, journal = {Forest Ecology and Management}, number = {306}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0378-1127 (Print)}, doi = {doi:10.1016/j.foreco.2013.06.007}, pages = {142 -- 149}, year = {2013}, language = {en} } @article{WegmannHacklStaatetal.2016, author = {Wegmann, Kilian and Hackl, Michael and Staat, Manfred and Mayer, Katharina and M{\"u}ller, Lars-Peter}, title = {Double plate osteosynthesis of proximal ulna fractures: biomechanical and clinical results}, series = {Knee surgery, sports traumatology, arthroscopy}, volume = {Volume 24}, journal = {Knee surgery, sports traumatology, arthroscopy}, number = {Supplement 1}, publisher = {Springer}, address = {Berlin}, issn = {0942-2056}, doi = {10.1007/s00167-016-4079-0}, pages = {58 -- 59}, year = {2016}, abstract = {While plate fixation of proximal ulna fractures might lead to superior clinical results compared to tension band wiring, regular plates represent an established risk factor for wound complications. The olecranon double plates (Medartis, Basel, CH) might decrease complications related to the osteosynthesis because of their low profile and better anatomical fit. This study aimed to evaluate the biomechanical performance and clinical results of the olecranon double plates.}, language = {en} } @article{WegnervonArxSassKlaassenetal.2013, author = {Wegner, Lena and von Arx, Georg and Sass-Klaassen, Ute G. W. and Eilmann, Britta}, title = {ROXAS - an efficient and accurate tool to detect vessels in diffuse-porous species}, series = {IAWA Journal / International Association of Wood Anatomists}, volume = {34}, journal = {IAWA Journal / International Association of Wood Anatomists}, number = {4}, publisher = {Brill}, address = {Leiden}, issn = {0928-1541 (Print)}, doi = {10.1163/22941932-00000034}, pages = {425 -- 432}, year = {2013}, language = {en} } @article{Weigand1992, author = {Weigand, Christoph}, title = {Economic Machine Adjustment in the Case of Product Screening .E.v.Collani, Ch. Weigand}, series = {Statistical Papers. 33 (1992)}, journal = {Statistical Papers. 33 (1992)}, pages = {171 -- 184}, year = {1992}, language = {en} } @article{Weigand2009, author = {Weigand, Christoph}, title = {Defining Precisions for Reliable Measurement and Estimation Procedures}, series = {Economic Quality Control. 24 (2009), H. 1}, journal = {Economic Quality Control. 24 (2009), H. 1}, publisher = {De Gruyter}, address = {Berlin}, isbn = {0940-5151}, pages = {5 -- 33}, year = {2009}, language = {en} } @article{Weigand2003, author = {Weigand, Christoph}, title = {Economically Optimal Inspection Policy with Geometrical Adaption}, series = {Journal of Applied Statistics. 30 (2003), H. 5}, journal = {Journal of Applied Statistics. 30 (2003), H. 5}, isbn = {0266-4763}, pages = {555 -- 569}, year = {2003}, language = {en} } @article{Weigand2001, author = {Weigand, Christoph}, title = {Economically Optimal Inspection Policy with Arithmetical Adaption}, series = {Applied stochastic models and data analysis / [10th International Symposium on Applied Stochastic Models and Analysis, June 12-15 2001, Universit{\´e} Technologique de Compi{\`e}gne] ; editors G{\´e}rard Govaert, Jacques Janssen, Nikolaos Limnios.}, journal = {Applied stochastic models and data analysis / [10th International Symposium on Applied Stochastic Models and Analysis, June 12-15 2001, Universit{\´e} Technologique de Compi{\`e}gne] ; editors G{\´e}rard Govaert, Jacques Janssen, Nikolaos Limnios.}, publisher = {Universit{\´e} Technologique de Compi{\`e}gne}, address = {Compi{\`e}gne}, pages = {1010 -- 1015}, year = {2001}, language = {en} } @article{Weigand1994, author = {Weigand, Christoph}, title = {Optimal Production Schedule for a K Products Single Machine Problem}, series = {Economic Quality Control. 9 (1994)}, journal = {Economic Quality Control. 9 (1994)}, isbn = {0940-5151}, pages = {91 -- 101}, year = {1994}, language = {en} } @article{Weigand2012, author = {Weigand, Christoph}, title = {Statistical Tests Based on Reliability and Precision}, series = {Economic Quality Control : EQC ; international journal for quality and reliability}, volume = {27}, journal = {Economic Quality Control : EQC ; international journal for quality and reliability}, number = {1}, publisher = {De Gruyter}, address = {Berlin}, issn = {1869-6147}, doi = {10.1515/eqc-2012-0002}, pages = {43 -- 64}, year = {2012}, abstract = {The construction of a statistical test is investigated which is based only on "reliability" and "precision" as quality criteria. The reliability of a statistical test is quantifiedin a straightforward way by the probability that the decision of the test is correct. However, the quantification of the precision of a statistical test is not at all evident. Thereforethe paper presents and discusses several approaches. Moreover the distinction of "nullhypothesis" and "alternative hypothesis" is not necessary any longer.}, language = {en} } @article{Weigand1991, author = {Weigand, Christoph}, title = {A Solution to the Scheduling Problem Taking into Account Quality}, series = {Operations research '91 : extended abstracts of the 16th Symposium on Operations Research held at the University of Trier at September 9 - 11, 1991 / [GM{\"O}OR]. Peter Gritzmann ... (eds.)}, journal = {Operations research '91 : extended abstracts of the 16th Symposium on Operations Research held at the University of Trier at September 9 - 11, 1991 / [GM{\"O}OR]. Peter Gritzmann ... (eds.)}, publisher = {Physica-Verl.}, address = {Heidelberg}, isbn = {3790806080}, pages = {373 -- 375}, year = {1991}, language = {en} } @article{Weigand2000, author = {Weigand, Christoph}, title = {Economically Optimal Adaptive Inspection Policies}, series = {Economic Quality Control. 15 (2000), H. 1/2}, journal = {Economic Quality Control. 15 (2000), H. 1/2}, isbn = {0940-5151}, pages = {55 -- 77}, year = {2000}, language = {en} } @article{Weigand1993, author = {Weigand, Christoph}, title = {On the Effects of SPC on Production Time}, series = {Economic Quality Control. 8 (1993)}, journal = {Economic Quality Control. 8 (1993)}, isbn = {0940-5151}, pages = {23 -- 61}, year = {1993}, language = {en} } @article{Weigand2003, author = {Weigand, Christoph}, title = {Technically Optimal Inspection Policy with Arithmetical Adaption}, series = {IMA Journal of Management Mathematics. 14 (2003), H. 4}, journal = {IMA Journal of Management Mathematics. 14 (2003), H. 4}, isbn = {1471-678X}, pages = {357 -- 371}, year = {2003}, language = {en} } @article{Weigand1990, author = {Weigand, Christoph}, title = {Optimal Adjustment Policies}, series = {Proceedings of the First Ume{\aa}-W{\"u}rzburg Conference in Statistics : Kronlund Conference Center and University of Ume{\aa}, September 10 - 14, 1990 / ed. by Kurt Br{\"a}nn{\"a}s}, journal = {Proceedings of the First Ume{\aa}-W{\"u}rzburg Conference in Statistics : Kronlund Conference Center and University of Ume{\aa}, September 10 - 14, 1990 / ed. by Kurt Br{\"a}nn{\"a}s}, publisher = {Univ. of Ume{\aa}}, address = {Ume{\aa}}, isbn = {91-7174-564-5}, pages = {147 -- 158}, year = {1990}, language = {en} } @article{Weigand1992, author = {Weigand, Christoph}, title = {A new Approach for Optimal Control of a Production process}, series = {Economic Quality Control. 7 (1992)}, journal = {Economic Quality Control. 7 (1992)}, isbn = {0940-5151}, pages = {225 -- 251}, year = {1992}, language = {en} } @article{WeigandCollaniSaniga1994, author = {Weigand, Christoph and Collani, E. v. and Saniga, E.M.}, title = {Economic Adjustment Design for -Control Charts. E.v.Collani, E.M. Saniga, Ch. Weigand}, series = {IIE Transactions / Institute of Industrial Engineers. 26 (1994), H. 6}, journal = {IIE Transactions / Institute of Industrial Engineers. 26 (1994), H. 6}, isbn = {0569-5554}, year = {1994}, language = {en} } @article{WeldenPoghossianVahidpouretal.2022, author = {Welden, Melanie and Poghossian, Arshak and Vahidpour, Farnoosh and Wendlandt, Tim and Keusgen, Michael and Wege, Christina and Sch{\"o}ning, Michael Josef}, title = {Towards multi-analyte detection with field-effect capacitors modified with tobacco mosaic virus bioparticles as enzyme nanocarriers}, series = {Biosensors}, volume = {12}, journal = {Biosensors}, number = {1}, publisher = {MDPI}, address = {Basel}, issn = {2079-6374}, doi = {10.3390/bios12010043}, pages = {Artikel 43}, year = {2022}, abstract = {Utilizing an appropriate enzyme immobilization strategy is crucial for designing enzyme-based biosensors. Plant virus-like particles represent ideal nanoscaffolds for an extremely dense and precise immobilization of enzymes, due to their regular shape, high surface-to-volume ratio and high density of surface binding sites. In the present work, tobacco mosaic virus (TMV) particles were applied for the co-immobilization of penicillinase and urease onto the gate surface of a field-effect electrolyte-insulator-semiconductor capacitor (EISCAP) with a p-Si-SiO₂-Ta₂O₅ layer structure for the sequential detection of penicillin and urea. The TMV-assisted bi-enzyme EISCAP biosensor exhibited a high urea and penicillin sensitivity of 54 and 85 mV/dec, respectively, in the concentration range of 0.1-3 mM. For comparison, the characteristics of single-enzyme EISCAP biosensors modified with TMV particles immobilized with either penicillinase or urease were also investigated. The surface morphology of the TMV-modified Ta₂O₅-gate was analyzed by scanning electron microscopy. Additionally, the bi-enzyme EISCAP was applied to mimic an XOR (Exclusive OR) enzyme logic gate.}, language = {en} } @article{WeldenSeverinsPoghossianetal.2022, author = {Welden, Melanie and Severins, Robin and Poghossian, Arshak and Wege, Christina and Bongaerts, Johannes and Siegert, Petra and Keusgen, Michael and Sch{\"o}ning, Michael Josef}, title = {Detection of acetoin and diacetyl by a tobacco mosaic virus-assisted field-effect biosensor}, series = {Chemosensors}, volume = {10}, journal = {Chemosensors}, number = {6}, publisher = {MDPI}, address = {Basel}, issn = {2227-9040}, doi = {10.3390/chemosensors10060218}, pages = {Artikel 218}, year = {2022}, abstract = {Acetoin and diacetyl have a major impact on the flavor of alcoholic beverages such as wine or beer. Therefore, their measurement is important during the fermentation process. Until now, gas chromatographic techniques have typically been applied; however, these require expensive laboratory equipment and trained staff, and do not allow for online monitoring. In this work, a capacitive electrolyte-insulator-semiconductor sensor modified with tobacco mosaic virus (TMV) particles as enzyme nanocarriers for the detection of acetoin and diacetyl is presented. The enzyme acetoin reductase from Alkalihalobacillus clausii DSM 8716ᵀ is immobilized via biotin-streptavidin affinity, binding to the surface of the TMV particles. The TMV-assisted biosensor is electrochemically characterized by means of leakage-current, capacitance-voltage, and constant capacitance measurements. In this paper, the novel biosensor is studied regarding its sensitivity and long-term stability in buffer solution. Moreover, the TMV-assisted capacitive field-effect sensor is applied for the detection of diacetyl for the first time. The measurement of acetoin and diacetyl with the same sensor setup is demonstrated. Finally, the successive detection of acetoin and diacetyl in buffer and in diluted beer is studied by tuning the sensitivity of the biosensor using the pH value of the measurement solution.}, language = {en} } @article{WeldenJablonskiWegeetal.2021, author = {Welden, Rene and Jablonski, Melanie and Wege, Christina and Keusgen, Michael and Wagner, Patrick Hermann and Wagner, Torsten and Sch{\"o}ning, Michael Josef}, title = {Light-Addressable Actuator-Sensor Platform for Monitoring and Manipulation of pH Gradients in Microfluidics: A Case Study with the Enzyme Penicillinase}, series = {Biosensors}, volume = {11}, journal = {Biosensors}, number = {6}, publisher = {MDPI}, address = {Basel}, issn = {2079-6374}, doi = {10.3390/bios11060171}, pages = {Artikel 171}, year = {2021}, abstract = {The feasibility of light-addressed detection and manipulation of pH gradients inside an electrochemical microfluidic cell was studied. Local pH changes, induced by a light-addressable electrode (LAE), were detected using a light-addressable potentiometric sensor (LAPS) with different measurement modes representing an actuator-sensor system. Biosensor functionality was examined depending on locally induced pH gradients with the help of the model enzyme penicillinase, which had been immobilized in the microfluidic channel. The surface morphology of the LAE and enzyme-functionalized LAPS was studied by scanning electron microscopy. Furthermore, the penicillin sensitivity of the LAPS inside the microfluidic channel was determined with regard to the analyte's pH influence on the enzymatic reaction rate. In a final experiment, the LAE-controlled pH inhibition of the enzyme activity was monitored by the LAPS.}, language = {en} }