@inproceedings{KellnerSchroder, author = {Kellner, Florian and Schroder, Nadine}, title = {Location Planning \& Analysis Using Uncertain Data}, series = {2021 International Conference on Decision Aid Sciences and Application (DASA), 07-08 December 2021, Sakheer, Bahrain}, booktitle = {2021 International Conference on Decision Aid Sciences and Application (DASA), 07-08 December 2021, Sakheer, Bahrain}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-6654-1634-4}, doi = {10.1109/DASA53625.2021.9682323}, pages = {720 -- 723}, abstract = {In today's big data era, a humongous amount of data are collected from various sources. In many cases, these data are incomplete, imprecise, and uncertain. An illustrative example is the OpenStreetMap project, where users all over the world contribute data on a more or less precise and complete level. This research shows whether these data are suited to support management decisions. A real-world example demonstrates the extent to which location decisions of a fast-food restaurant chain can be reproduced using techniques from the field of advanced analytics. The problem deals with classifying potential locations and comparing the predicted locations with the actual ones. The data used for this example are retrieved from the OpenStreetMap project. We find that the OpenStreetMap data are generally suitable for predicting location decisions. However, the choice of the data analytics technique is crucial. In our illustrative example case, boosted trees resulted in the best forecast, thereby outperforming neural networks, classic trees, and logit models.}, language = {en} } @article{KraftKellner, author = {Kraft, Sarah Katharina and Kellner, Florian}, title = {Can Blockchain Be a Basis to Ensure Transparency in an Agricultural Supply Chain?}, series = {Sustainability}, volume = {14}, journal = {Sustainability}, number = {13}, publisher = {MDPI}, doi = {10.3390/su14138044}, abstract = {Many supply chains within developing countries lack transparency and are fraught with fraud, corruption, and a substantial number of intermediaries. For several decades, the cocoa sector has faced multiple social, economic, and environmental challenges, some of which include the issue of child labor and very low incomes for farmers, leading to poor living conditions. Blockchain technology has a high potential to reduce—or completely eradicate—some of these hurdles. In this article, we present a blockchain-based solution based on the open-source framework Hyperledger Fabric for the cocoa supply chain to promote transparency and reduce fraud. In doing so, we explicitly describe how farmers can be directly integrated into the whole blockchain solution considering the limited infrastructure, knowledge, and technologies available to them. Since about 70\% of all cocoa worldwide is produced in West Africa, this case study uses the cocoa sector in Ghana as an example.}, language = {en} } @article{KellnerOtto, author = {Kellner, Florian and Otto, Andreas}, title = {Allocating CO2 emissions to shipments in road freight transportation}, series = {Journal of Management Control}, volume = {22}, journal = {Journal of Management Control}, number = {4}, publisher = {Springer}, doi = {10.1007/s00187-011-0143-6}, pages = {451 -- 479}, abstract = {Logistic activity, in particular transportation, produces green house gases (GHG). For different purposes GHG need to be allocated to objects. This paper studies how to allocate the GHG volume of a transportation process (delivery tour) to the single shipments moved by the process. First, it identifies classes of generic allocation schemes and presents 15 allocation methods. Second, since the majority of these methods has not been designed for allocating GHG, we apply and compare them in the short distance transport context within a numerical example. The aim is to study how the schemes perform according to criteria. We suggest using causality, efficiency, empty core robustness, symmetry, individual rationality, coalition stability, ease of application, and set robustness as appraisal criteria and attempt to mainstream the discussion by recommending selected allocation methods.}, language = {en} } @incollection{LukeschKellner, author = {Lukesch, Maximilian and Kellner, Florian}, title = {Geoinformationssysteme f{\"u}r Logistikmanager: Eine praxisorientierte Einf{\"u}hrung am Beispiel der Freeware QGIS}, series = {Praxishandbuch Logistik}, booktitle = {Praxishandbuch Logistik}, editor = {Pradel, Uwe-Heiner}, publisher = {Wolters Kluwer}, address = {K{\"o}ln}, language = {de} } @unpublished{KellnerUtz, author = {Kellner, Florian and Utz, Sebastian}, title = {Sustainability in Supplier Selection and Order Allocation: Combining Integer Variables With Markowitz Portfolio Theory}, series = {SSRN Electronic Journal}, journal = {SSRN Electronic Journal}, publisher = {SSRN}, doi = {10.2139/ssrn.3296016}, abstract = {This research presents a decision support methodology for the multi-criteria supplier selection and order allocation problem. The proposed approach supports purchasing managers in assembling mid-term supplier portfolios while making them aware of the trade-offs between the supplier sustainability, the purchasing costs, and the overall supply risk. First, we propose a multi-objective optimization model with three objectives: to maximize the supplier sustainability, to select the supplier portfolio with the lowest purchasing costs, and to minimize the supply risk. Our model extends existing mathematical approaches that follow the portfolio theory fathered by H. Markowitz by integrating the aspect 'risk' into the supplier selection problem. Secondly, since we allow for integer variables in our model — in contrast to the classical Markowitz portfolio theory — we use the ε-constraint method to visualize the efficient surface. The possibility of considering the non-dominated set of supplier portfolios is advantageous for purchasing managers as they gain a picture of the different optimal supplier portfolios and are able to analyze the trade-offs between the different purchasing goals before making a decision. Finally, we illustrate the applicability of the proposed methodology in a real-world supplier selection and order allocation case from the automotive industry. In the example case, we identify 1,754 optimal supplier portfolios that may be assembled based on the eight available suppliers. Our analyses show that each optimal portfolio consists of two suppliers, with one specific supplier being included in each portfolio. Furthermore, four suppliers are not part of any optimal solution.}, language = {en} } @unpublished{Kellner, author = {Kellner, Florian}, title = {Generating Greenhouse Gas Cutting Incentives when Allocating Carbon Dioxide Emissions to Shipments in Road Freight Transportation}, series = {SSRN Electronic Journal}, journal = {SSRN Electronic Journal}, doi = {10.2139/ssrn.3518014}, abstract = {Road freight transportation accounts for a great share of the anthropogenic greenhouse gas (GHG) emissions. In order to provide a common methodology for carbon accounting related to transport activities, the European Committee for Standardization has published the European Norm EN-16258. Unfortunately, EN-16258 contains in its current version some gaps and ambiguities and leaves room for interpretation, which makes the comparison of the environmental performance of different logistics networks still difficult and hinders the identification of best practices. This research aims to overcome the ambiguities of EN-16258 concerning the allocation of GHG emissions to shipments in road freight transportation. In detail, we apply concepts of the cooperative game theory to identify among all allocation units specified by EN-16258 the most meaningful one. In doing so, we continue previous research projects that analyzed two important aspects of the EN-16258 allocation rules: accuracy and fairness. This study provides further insights into this allocation problem by investigating the incentive power of the different allocation schemes to opt for the GHG minimal way of running a road freight transport network. First, we complement the list of transport scenarios introduced by the prior research projects and present two novel transport scenarios. Second, we carry out a series of numerical experiments to compare the performance of the EN-16258 allocation rules with respect to accuracy, fairness, and the GHG minimizing incentive. Across all aspects, and taking the findings of the prior research projects into account, we conclude that the distance-based allocation rule is the most meaningful one.}, language = {en} } @article{KunklerKellner, author = {Kunkler, Jan and Kellner, Florian}, title = {Sustainable City Evaluation Using the Database for Estimation of Road Network Performance}, series = {Sustainability}, volume = {15}, journal = {Sustainability}, number = {1}, publisher = {MDPI}, doi = {10.3390/su15010733}, abstract = {This article introduces the Database for Estimation of Road Network Performance (DERNP) to enable wide-scale estimation of relevant Road Network Performance (RNP) factors for major German cities. The methodology behind DERNP is based on a randomized route sampling procedure that utilizes the Worldwide Harmonized Light Vehicles Test Procedure (WLTP) in combination with the tile-based HERE Maps Traffic API v7 and a digital elevation model provided by the European Union's Earth Observation Programme Copernicus to generate a large set of independent and realistic routes throughout OpenStreetMap road networks. By evaluating these routes using the PHEMLight5 framework, a comprehensive list of RNP parameters is estimated and translated into polynomial regression models for general usage. The applicability of these estimations is demonstrated based on a case study of four major German cities. This case study considers network characteristics in terms of detours, infrastructure, traffic congestion, fuel consumption, and CO2 emissions. Our results show that DERNP and its underlying randomized route sampling methodology overcomes major limitations of previous wide-scale RNP approaches, enabling efficient, easy-to-use, and region-specific RNP comparisons.}, language = {en} } @misc{LauerCorsten, author = {Lauer, Norina and Corsten, Sabine}, title = {Supporting peer-led aphasia support groups with a specific training program: a first proof of concept}, series = {International Aphasia Rehabilitation Conference, London}, journal = {International Aphasia Rehabilitation Conference, London}, language = {en} } @article{SchuberthLauerGroetzbach, author = {Schuberth, Romy and Lauer, Norina and Gr{\"o}tzbach, Holger}, title = {An der Schnittstelle von station{\"a}r und ambulant - Wie Menschen mit Aphasie den {\"U}bergang zwischen klinischer Rehabilitation und ambulanter Logop{\"a}die erleben}, series = {Forum Logop{\"a}die}, volume = {30}, journal = {Forum Logop{\"a}die}, number = {6}, publisher = {Schulz-Kirchner-Verlag}, doi = {10.2443/skv-s-2016-53020160603}, pages = {22 -- 27}, abstract = {In Deutschland wird in der Patientenversorgung zwischen station{\"a}rem und ambulantem Sektor getrennt. Dieser als Schnittstelle bezeichnete {\"U}bergang wurde im Rahmen von diversen Forschungsarbeiten bereits mehrfach untersucht. Dabei wurden Barrieren identifiziert, die den {\"U}bergang von der station{\"a}ren in die ambulante Therapie in vielen F{\"a}llen erschweren. F{\"u}r die Logop{\"a}-die, insbesondere f{\"u}r Menschen mit einer Aphasie, liegen dazu bislang jedoch keine hinreichenden Informationen vor. Daher wurden acht Interviews mit dem Ziel gef{\"u}hrt, von Menschen mit einer Apha-sie einen ersten Einblick in den {\"U}bergangsprozess von einem Rehabilitationsbereich in den n{\"a}chsten zu erhalten. Im Vordergrund stand dabei die Frage, welche Ressourcen, aber auch welche Hindernisse von den Betroffenen wahrgenommen wurden. Die Ergebnisse der Befragung ließen sich in die Kategorien Organisation, Emotionen, Information und Angeh{\"o}rige zusammenfassen. Innerhalb der Kategorien konnten deutliche schnittstellenbezogene Defizite, aber auch Hinweise auf eine Schnittstellenoptimie-rung identifiziert werden. Neben der unzureichenden Vorbereitung auf die Entlassung aus den Rehabili-tationskliniken, dem Fehlen wichtiger Informationen und dem l{\"u}ckenhaften Einbinden der Angeh{\"o}rigen gaben die Betroffenen auch infrastrukturelle Gegebenheiten als Barrieren der station{\"a}r-ambulanten Schnittstelle an. Ausgehend von den Barrieren werden M{\"o}glichkeiten dargestellt, die Hindernisse von einer station{\"a}ren zur ambulanten Versorgung zu minimieren.}, language = {de} } @misc{LukeschKellner, author = {Lukesch, Maximilian and Kellner, Florian}, title = {Business Analytics and Big Data: Production, Logistics and Supply Chain Management}, series = {1. Regensburger Big Data Day, 30 Oktober 2018, Regensburg}, journal = {1. Regensburger Big Data Day, 30 Oktober 2018, Regensburg}, doi = {10.5283/epub.37889}, abstract = {Das Poster befasst sich mit dem Beitrag der Auswertung von "Big Data" f{\"u}r die Anwendungsbereiche der Produktion, der Logistik und des Supply Chain Management. Im Kern steht dabei die Anwendung von Business Analytics Methoden und die Umsetzung der Analytics-Ergebnisse in anwendungsorientierte Use Cases. Als Beispiele werden besprochen: Predictive Maintenance, Supply Chain Monitoring, Supply Chain Risk Management, Demand Forecasting.}, language = {en} } @techreport{VoigtRadloffAyerleBraunetal., type = {Working Paper}, author = {Voigt-Radloff, Sebastian and Ayerle, Gertrud M. and Braun, Cordula and H{\"o}hl, Werner and Lauer, Norina and Lautenschl{\"a}ger, Sindy and Marotzki, Ulrike and Mattern, Elke and M{\"u}ller, Christian}, title = {Leitfaden zum Aufbau Praxisbasierter Forschungsnetzwerke (PBFN) in den Gesundheitsfachberufen}, language = {de} } @misc{BieberKempfLaueretal., author = {Bieber, Claudia and Kempf, Sabrina and Lauer, Norina and Lutz-Kopp, Matthias and Corsten, Sabine}, title = {Kommunikation in Aphasie-Selbsthilfegruppen aus Sicht einer betroffenen Teilnehmerin}, series = {Jahrestagung der Gesellschaft f{\"u}r Aphasieforschung und -behandlung (GAB), Tagungsband}, journal = {Jahrestagung der Gesellschaft f{\"u}r Aphasieforschung und -behandlung (GAB), Tagungsband}, address = {Osnabr{\"u}ck}, pages = {53 -- 55}, language = {de} } @techreport{VoigtRadloffStemmerBehrensetal., author = {Voigt-Radloff, Sebastian and Stemmer, Renate and Behrens, Johann and Horbach, Annegret and Ayerle, Gertrud M. and Sch{\"a}fers, Rainhild and Mattern, Elke and Heldmann, Patrick and Braun, Cordula and Marotzki, Ulrike and Kraus, Elke and George, Sabine and M{\"u}ller, Christian and Corsten, Sabine and Lauer, Norina and Schade, Veronika and Kempf, Sabrina and Binnig, Marlis and Wasner, Mieke}, title = {Forschung zu komplexen Interventionen in der Pflege- und Hebammenwissenschaft und in den Wissenschaften der Physiotherapie, Ergotherapie und Logop{\"a}die}, doi = {10.6094/UNIFR/2013/1}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-8939}, pages = {57}, abstract = {Dieser forschungsmethodische Leitfaden behandelt folgende Themen: (1) Wissenschaftlicher Transfer von komplexen Interventionen inkl. Fragestellungen und Methoden von Machbarkeits-, Wirksamkeits- und Implementationsstudien. (2) Recherchestrategien zur Krankheitslast inkl. Folgen f{\"u}r Betroffene und Gesellschaft und Versorgungsstatus durch Gesundheitsfachberufe. (3) Pr{\"a}zisierung von Forschungsfragestellungen. (4) Evidenzrecherche, Evidenzmapping und Beurteilung der Evidenzlage. (5) F{\"o}rderm{\"o}glichkeiten von Forschungsprojekten. (6) Forschungsnetzwerke in den Gesundheitsfachberufen.}, language = {de} } @book{KellnerBrabaender, author = {Kellner, Florian and Brab{\"a}nder, Christian}, title = {VBA mit Excel : Einf{\"u}hrung f{\"u}r Betriebswirte}, publisher = {Springer Gabler}, address = {Berlin}, isbn = {9783662597408}, doi = {10.1007/978-3-662-59740-8}, pages = {XI, 149}, abstract = {Dieses Buch bietet eine anwendungsorientierte Einf{\"u}hrung in die Programmierung mit Visual Basic for Applications (VBA) in Microsoft Excel. Es erm{\"o}glicht auch Einsteigern die selbstst{\"a}ndige L{\"o}sung kleiner bis mittelgroßer Programmieraufgaben aus dem betriebswirtschaftlichen Alltag. Der Schwierigkeitsgrad der Inhalte ist {\"u}berwiegend einfach gehalten, sodass Nutzer, die bereits grundlegende T{\"a}tigkeiten in MS Excel beherrschen, sich nach ihren jeweiligen Anforderungen entsprechend fortbilden k{\"o}nnen. Zahlreiche Praxisbeispiele und {\"U}bungen, die auf einem Windows-Betriebssystem entwickelt und getestet wurden, unterst{\"u}tzen das Lernen Schritt f{\"u}r Schritt und zeigen, wie hilfreich VBA durch Automatisierung und Individualisierung in jedem B{\"u}ro sein kann.}, language = {de} } @book{LukeschKellner, author = {Lukesch, Maximilian and Kellner, Florian}, title = {{\"U}bungsbuch Produktionswirtschaft : Planung, Steuerung und Industrie 4.0}, edition = {2., {\"u}berarbeitete und erweiterte Auflage}, publisher = {Springer Gabler}, address = {Berlin}, isbn = {978-3-662-62086-1}, doi = {10.1007/978-3-662-62087-8}, pages = {XVIII, 283}, abstract = {Dieses Buch bietet Studierenden mehr als 70 {\"U}bungsaufgaben und drei Fallstudien inklusive ausf{\"u}hrlicher L{\"o}sungen zu ausgew{\"a}hlten Themen der Produktionswirtschaft und Industrie 4.0. Jedes Kapitel enth{\"a}lt eine kurze Einleitung sowie zu erreichende Lernziele. Querverweise auf das Lehrbuch „Produktionswirtschaft" von Kellner/Lienland/Lukesch erleichtern das Selbststudium und erm{\"o}glichen eine optimale Pr{\"u}fungsvorbereitung. In der 2. Auflage wurden umfangreiche {\"U}berarbeitungen hinsichtlich Sprache und Aufbau von Aufgaben, L{\"o}sungswegen und Abbildungen vorgenommen sowie zahlreiche neue Aufgaben erg{\"a}nzt.}, language = {de} } @misc{BorgeltHammerLauer, author = {Borgelt, Tim and Hammer, Sabine and Lauer, Norina}, title = {Ressourcen bei der Implementierung evidenzbasierter Praxis in den logop{\"a}dischen Berufsalltag - Eine qualitative Studie}, series = {43. Jahrestagung des Deutschen Bundesverbands f{\"u}r Logop{\"a}die vom 19. bis 21. Juni 2014 in Berlin}, journal = {43. Jahrestagung des Deutschen Bundesverbands f{\"u}r Logop{\"a}die vom 19. bis 21. Juni 2014 in Berlin}, address = {Berlin}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-8878}, pages = {26}, language = {de} } @misc{CorstenKempfLutzKoppetal., author = {Corsten, Sabine and Kempf, Sabrina and Lutz-Kopp, Matthias and Berger-Tunkel, Merle and Lauer, Norina}, title = {Eigenverantwortliche Selbsthilfegruppenarbeit bei Aphasie - erste Erfahrungen}, series = {Jahrestagung der Gesellschaft f{\"u}r Aphasieforschung und -behandlung (GAB)}, journal = {Jahrestagung der Gesellschaft f{\"u}r Aphasieforschung und -behandlung (GAB)}, pages = {70 -- 71}, language = {de} } @misc{JunkWeinreichLauer, author = {Junk, Dagmar and Weinreich, Elisabeth and Lauer, Norina}, title = {Die Einsetzbarkeit der artikulatorischen Diadochokinese als Diagnostikinstrument f{\"u}r Dysarthrien}, series = {42. dbl-Kongress, 30. Mai - 1. Juni 2013, Erfurt}, journal = {42. dbl-Kongress, 30. Mai - 1. Juni 2013, Erfurt}, address = {Erfurt}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-8953}, pages = {9}, language = {de} } @misc{HofmannLauerGrewe, author = {Hofmann, Jessica and Lauer, Norina and Grewe, Tanja}, title = {LogoApp "Galgenm{\"a}nnchen" - Konzept zur Entwicklung einer sprachtherapeutisch fundierten App f{\"u}r Menschen mit Aphasie}, series = {Jahrestagung der Gesellschaft f{\"u}r Aphasieforschung und -behandlung (GAB), Innsbruck, Tagungsband}, journal = {Jahrestagung der Gesellschaft f{\"u}r Aphasieforschung und -behandlung (GAB), Innsbruck, Tagungsband}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-8787}, pages = {75 -- 77}, language = {de} } @misc{GroetzbachLauer, author = {Gr{\"o}tzbach, Holger and Lauer, Norina}, title = {ICF-basierte Therapieziele erstellen: Beispiele f{\"u}r den Bereich Aphasie}, series = {42. dbl-Kongress, 30. Mai - 1. Juni 2013, Erfurt}, journal = {42. dbl-Kongress, 30. Mai - 1. Juni 2013, Erfurt}, address = {Erfurt}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-8968}, pages = {9}, language = {de} } @techreport{VoigtRadloffStemmerKorporaletal., type = {Working Paper}, author = {Voigt-Radloff, Sebastian and Stemmer, Renate and Korporal, Johannes and Horbach, Annegret and Ayerle, Gertrud M. and Sch{\"a}fers, Rainhild and Greening, Monika and Binnig, Marlis and Mattern, Elke and Heldmann, Patrick and Wasner, Mieke and Braun, Cordula and Lohkamp, Monika and Marotzki, Ulrike and Kraus, Elke and Oltman, Ren{\´e}e and M{\"u}ller, Christian and Corsten, Sabine and Lauer, Norina and Schade, Veronika and Kempf, Sabrina}, title = {Forschung zu komplexen Interventionen in der Pflege- und Hebammenwissenschaft und in den Wissenschaften der Physiotherapie, Ergotherapie und Logop{\"a}die}, doi = {10.6094/UNIFR/10702}, language = {de} }