TY - JOUR A1 - Kellner, Florian T1 - Exploring the impact of traffic congestion on CO2 emissions in freight distribution networks JF - Logistics Research N2 - This research quantifies the impact that regular road traffic congestion has on the CO2 emissions of a real-world distribution network, and it studies the consequences when the number of distribution centers changes. For this purpose, this study makes use of a network model allowing for a detailed representation of all relevant transport operations, including production flows between factories and distribution centers, line haul shipments between distribution centers and customers, and round/delivery trips between transshipment points and retailer locations for the last mile. The processed trip and traffic information does not rely on standard traffic data collection approaches, such as interviews, in situ technologies, or floating car data, but the road traffic data are retrieved from an online navigation service, such as Bing Maps, Google Maps, Inrix, Here, and TomTom. This study proves that online navigation services may considerably contribute to future research projects analyzing CO2 sensitivities and greenhouse gas cutting opportunities in logistics networks. Y1 - 2016 U6 - https://doi.org/10.1007/s12159-016-0148-5 VL - 9 PB - Springer Nature ER - TY - JOUR A1 - Kraft, Sarah Katharina A1 - Quayson, Matthew A1 - Kellner, Florian T1 - Assessing the German Act on Corporate Due Diligence Obligations in Supply Chains: a perspective from the smallholder cocoa farmer JF - Frontiers in Sustainability N2 - This research examines the potential outputs, outcomes, and impacts of the German Act on Corporate Due Diligence Obligations in Supply Chains (LkSG) on the smallholder cocoa farmers in West Africa. The study primarily relies on a literature review and an impact pathway to conduct a systematic analysis to identify the potential effects of the LkSG on smallholder cocoa farmers. The findings indicate that some, but not all of the risks addressed by the LkSG align with those faced by smallholder cocoa farmers and their families. Additionally, the research also reveals weaknesses, particularly in managing environmental risks, which the LkSG does not adequately cover. Our findings show that in the short- and medium-term, the LkSG has no potential effects on smallholder cocoa farmers. Furthermore, the potential positive impacts of the law on smallholder cocoa farmers will take a long time to realize, as the LkSG considers primarily tier-1 suppliers. Companies in Germany might reassess their supply chains to strive for an LkSG-risk-free supply chain, which could in the long term have sustained impacts on smallholder cocoa farmers. However, we recommend a comprehensive risk analysis of the cocoa supply chain to enhance the human rights of cocoa farmers. Y1 - 2024 U6 - https://doi.org/10.3389/frsus.2024.1376619 VL - 5 PB - frontiers ER - TY - CHAP A1 - Kellner, Florian A1 - Schroder, Nadine T1 - Location Planning & Analysis Using Uncertain Data T2 - 2021 International Conference on Decision Aid Sciences and Application (DASA), 07-08 December 2021, Sakheer, Bahrain N2 - 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. Y1 - 2021 SN - 978-1-6654-1634-4 U6 - https://doi.org/10.1109/DASA53625.2021.9682323 SP - 720 EP - 723 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Kraft, Sarah Katharina A1 - Kellner, Florian T1 - Can Blockchain Be a Basis to Ensure Transparency in an Agricultural Supply Chain? JF - Sustainability N2 - 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. Y1 - 2022 U6 - https://doi.org/10.3390/su14138044 VL - 14 IS - 13 PB - MDPI ER - TY - JOUR A1 - Kellner, Florian A1 - Otto, Andreas T1 - Allocating CO2 emissions to shipments in road freight transportation JF - Journal of Management Control N2 - 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. Y1 - 2012 U6 - https://doi.org/10.1007/s00187-011-0143-6 VL - 22 IS - 4 SP - 451 EP - 479 PB - Springer ER - TY - CHAP A1 - Lukesch, Maximilian A1 - Kellner, Florian ED - Pradel, Uwe-Heiner T1 - Geoinformationssysteme für Logistikmanager: Eine praxisorientierte Einführung am Beispiel der Freeware QGIS T2 - Praxishandbuch Logistik Y1 - 2019 PB - Wolters Kluwer CY - Köln ER - TY - INPR A1 - Kellner, Florian A1 - Utz, Sebastian T1 - Sustainability in Supplier Selection and Order Allocation: Combining Integer Variables With Markowitz Portfolio Theory T2 - SSRN Electronic Journal N2 - 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. Y1 - 2018 U6 - https://doi.org/10.2139/ssrn.3296016 N1 - Erschienen bei Springer im Journal of Cleaner Production 214, 2025: https://doi.org/10.1016/j.jclepro.2018.12.315 PB - SSRN ER - TY - INPR A1 - Kellner, Florian T1 - Generating Greenhouse Gas Cutting Incentives when Allocating Carbon Dioxide Emissions to Shipments in Road Freight Transportation T2 - SSRN Electronic Journal N2 - 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. Y1 - 2020 U6 - https://doi.org/10.2139/ssrn.3518014 N1 - Erschienen bei Springer im OR-Spektrum 44, 2020(3): https://doi.org/10.1007/s00291-022-00675-y ER - TY - JOUR A1 - Kunkler, Jan A1 - Kellner, Florian T1 - Sustainable City Evaluation Using the Database for Estimation of Road Network Performance JF - Sustainability N2 - 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. Y1 - 2023 U6 - https://doi.org/10.3390/su15010733 VL - 15 IS - 1 PB - MDPI ER - TY - GEN A1 - Lukesch, Maximilian A1 - Kellner, Florian T1 - Business Analytics and Big Data: Production, Logistics and Supply Chain Management T2 - 1. Regensburger Big Data Day, 30 Oktober 2018, Regensburg N2 - Das Poster befasst sich mit dem Beitrag der Auswertung von "Big Data" für 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. Y1 - 2018 U6 - https://doi.org/10.5283/epub.37889 ER - TY - BOOK A1 - Kellner, Florian A1 - Brabänder, Christian T1 - VBA mit Excel : Einführung für Betriebswirte N2 - Dieses Buch bietet eine anwendungsorientierte Einführung in die Programmierung mit Visual Basic for Applications (VBA) in Microsoft Excel. Es ermöglicht auch Einsteigern die selbstständige Lösung kleiner bis mittelgroßer Programmieraufgaben aus dem betriebswirtschaftlichen Alltag. Der Schwierigkeitsgrad der Inhalte ist überwiegend einfach gehalten, sodass Nutzer, die bereits grundlegende Tätigkeiten in MS Excel beherrschen, sich nach ihren jeweiligen Anforderungen entsprechend fortbilden können. Zahlreiche Praxisbeispiele und Übungen, die auf einem Windows-Betriebssystem entwickelt und getestet wurden, unterstützen das Lernen Schritt für Schritt und zeigen, wie hilfreich VBA durch Automatisierung und Individualisierung in jedem Büro sein kann. Y1 - 2019 SN - 9783662597408 U6 - https://doi.org/10.1007/978-3-662-59740-8 PB - Springer Gabler CY - Berlin ER - TY - BOOK A1 - Lukesch, Maximilian A1 - Kellner, Florian T1 - Übungsbuch Produktionswirtschaft : Planung, Steuerung und Industrie 4.0 N2 - Dieses Buch bietet Studierenden mehr als 70 Übungsaufgaben und drei Fallstudien inklusive ausführlicher Lösungen zu ausgewählten Themen der Produktionswirtschaft und Industrie 4.0. Jedes Kapitel enthält eine kurze Einleitung sowie zu erreichende Lernziele. Querverweise auf das Lehrbuch „Produktionswirtschaft“ von Kellner/Lienland/Lukesch erleichtern das Selbststudium und ermöglichen eine optimale Prüfungsvorbereitung. In der 2. Auflage wurden umfangreiche Überarbeitungen hinsichtlich Sprache und Aufbau von Aufgaben, Lösungswegen und Abbildungen vorgenommen sowie zahlreiche neue Aufgaben ergänzt. Y1 - 2020 SN - 978-3-662-62086-1 U6 - https://doi.org/10.1007/978-3-662-62087-8 PB - Springer Gabler CY - Berlin ET - 2., überarbeitete und erweiterte Auflage ER - TY - JOUR A1 - Bartzsch, Nikolaus A1 - Rösl, Gerhard A1 - Seitz, Franz T1 - Estimating the foreign circulation of banknotes JF - Economics Letters N2 - In this paper, we analyze the volume of Euro banknotes issued by Germany and circulating in other Euro area countries as well as outside the Euro area with a banknotes’ age model. Our approach suggests that about 60% of banknotes, the equivalent of around € 225 billion, is held abroad. Highlights ► We analyze the volume of Euro banknotes issued by Germany and circulating abroad. ► We use a model of the age of banknotes. ► The model captures demand from other Euro area countries and outside the Euro area. ► About 60% of “German” banknotes (€ 225 billion) are held abroad. Y1 - 2013 U6 - https://doi.org/10.1016/j.econlet.2013.02.017 VL - 119 IS - 2 SP - 165 EP - 167 PB - Elsevier ER - TY - GEN A1 - Lang, Gabriele A1 - Findeisen, Vivien T1 - Measuring success and impact of knowledge and technology transfer between university, industry and society T2 - University Industry Innovation Network Conference 2021, June 14-16 N2 - Our workshop aims to discuss the terms transfer success and transfer effectiveness and to agree on a common definition with the participants on the one hand. On the other, the moderators and workshop participants together will develop a set of indicators to measure technology and knowledge transfer success by focussing on the interaction of university with industry and society. The initiators’ background is the joint research project "Transfer_i" which's name simply stands for Transfer Indicators. The research partners developed a holistic approach on the technology and knowledge transfer process to contribute to the rather fragmented state of research. In addition, the project points out its value of practice by attempting a measurement of transfer output and even its impact with quantitative and qualitative indicators. KW - Wissens- und Technologietransfer KW - Transferindikatorik Y1 - 2021 ER - TY - BOOK A1 - Hamella, Sandra A1 - Schneider, Sascha A1 - Vaslin, Marcel T1 - Volkswirtschaftslehre Lernsituationen- berufliche Oberschule Bayern, Fachhochschulreife BT - W PLUS V – VWL – FOS/BOS Bayern: Jahrgangsstufe 11/12 – Volkswirtschaftslehre Y1 - 2017 SN - 978-3064514645 PB - Cornelsen CY - Berlin ER - TY - BOOK A1 - Caha, Zdeněk A1 - Faltermeier, Johann Fabian A1 - Gregor, Jan A1 - Justus, Xenia A1 - Kajanová, Alena A1 - Mácha, Jiří A1 - Machová, Veronika A1 - Martíšková, Petra A1 - Polanecký, Lukáš A1 - Ruschak, Michal A1 - Saßmannshausen, Sean Patrick A1 - Slabá, Marie A1 - Stellner, František A1 - Straková, Jarmila A1 - Šuta, Michal A1 - Švec, Roman A1 - Urban, Jan A1 - Váchal, Jan A1 - Velková, Vendula A1 - Vokoun, Marek T1 - Handbuch für Unternehmensgründer = Příručka pro podnikatele = Handbook for entrepreneurs N2 - The aim of this publication is to provide entrepreneurs a comprehensive overview of the most important steps in starting a business, to compare the business environment in the Czech Republic and Germany, and to get an overview of financing opportunities. There is discussed the motivation leading to entrepreneurship, advice on how to create a business plan and the necessary legal steps that the beginning entrepreneur must take when registering. KW - business establishment KW - Czech Republic KW - financing KW - Germany KW - handbook Y1 - 2019 UR - https://www.researchgate.net/publication/337444742 SN - 978-80-7468-140-0 N1 - Text PB - Vysoká škola technická a ekonomická v Českých Budějovicích CY - České Budějovice ER - TY - INPR A1 - Bartzsch, Nikolaus A1 - Rösl, Gerhard A1 - Seitz, Franz T1 - Der Auslandsumlauf Deutscher Euro-Banknoten: Schätzung Mit Indirekten Ansätzen N2 - In dem vorliegenden Papier versuchen wir den Bestand der Euro-Banknoten zu ermitteln, der sich von der deutschen Banknotenemission im Ausland befindet. Dabei unterscheiden wir nach Beständen, die außerhalb des Euro-Währungsraumes gehalten werden, und solchen, die in anderen Ländern der EWU zirkulieren. Die Analyse basiert auf Ansätzen, die den Auslandsumlauf auf indirektem Wege abschätzen. Der Untersuchungszeitraum reicht von 2002 bis 2009. Wir finden heraus, dass Ende 2009 insgesamt rund zwei Drittel der deutschen kumulierten Nettoemissionen im Ausland umliefen. Der größte Teil, etwa 160 Mrd. €, befand sich außerhalb des Euro-Raums, der Rest - 80 Mrd. € - lief in anderen EWU-Ländern um. Somit entsprach der Inlandsumlauf deutscher Euro-Banknoten nur rund einem Drittel aller von der Bundesbank in Höhe von 350 Mrd. € in Umlauf gegebenen Banknoten. Damit werden die Ergebnisse direkter Ansätze bestätigt. KW - Banknoten KW - Euro KW - Auslandsumlauf KW - Hortung KW - Transaktionskasse KW - Binnenmigration Y1 - 2011 U6 - https://doi.org/10.2139/ssrn.2785412 PB - SSRN ER - TY - GEN A1 - Saßmannshausen, Sean Patrick T1 - Systematisches Unternehmertum in bestehenden Unternehmen - eine Methode zur Steigerung der Konkurrenzfähigkeit - [Vortrag 16.10.2017] Y1 - 2017 PB - Hochschule für Technik und Wirtschaft CY - České Budějovice ER - TY - JOUR A1 - Curbach, Janina A1 - Lander, Jonas A1 - Dierks, Marie-Luise A1 - Grepmeier, Eva-Maria A1 - von Sommoggy, Julia T1 - How do health professionals translate evidence on early childhood allergy prevention into health literacy-responsive practice? BT - A protocol for a mixed-method study on the views of German health professionals JF - BMJ OPEN N2 - Introduction Paediatricians, general practitioners (GPs) and midwives in primary care are important sources of information for parents on early childhood allergy prevention (ECAP). Research has shown that preventive counselling by health professionals can be effective in improving patients' health literacy (HL) and health behaviour. Providing effective advice relies on two factors. First, health professionals need be up-to-date with research evidence on ECAP, to consider popular misconceptions and fears and to translate this knowledge into clear recommendations for parents (knowledge translation). Second, they need to know and apply counselling techniques and create a practice setting which accommodates parental HL needs (health literacy-responsive care). The objective of this study is to explore and assess how German health professionals take up and translate ECAP evidence into appropriate recommendations for parents, how they consider HL in counselling and practice organisation and what barriers and enablers they find in their performance of HL-responsive ECAP. Methods and analysis The study has a sequential mixed-method design, in two phases. In the first phase, qualitative semi-structured expert interviews will be conducted with health professionals (paediatricians, GPs and midwives) at primary care level and professional policy level. Data collection is ongoing until January 2022. In the second phase, based on the qualitative results, a standardised questionnaire will be developed, and pilot-tested in a wider population of German health professionals. The findings of both phases will be integrated. Ethics and dissemination The study has received ethical approval from the Ethics Committee of the University of Regensburg (18-1205-101). The results will be published in international peer-reviewed open access journals and via presentations at scientific conferences. The results will also be shared with German health professionals, decision-makers and potential funders of interventions. KW - FOOD ALLERGY KW - INTERVENTION KW - MINDLINES KW - PERCEPTIONS KW - PERSPECTIVES KW - PHYSICAL-ACTIVITY KW - preventive medicine KW - PRIMARY-CARE KW - public health KW - qualitative research KW - social medicine Y1 - 2021 U6 - https://doi.org/10.1136/bmjopen-2020-047733 N1 - Corresponding author: Janina Curbach VL - 11 SP - 1 EP - 8 PB - BMJ ER - TY - JOUR A1 - Saßmannshausen, Sean Patrick A1 - Gladbach, Stefan T1 - Entrepreneurship Education between Theory and Practice: Reflections on Case Study Based Teaching JF - Journal of Asia Entrepreneurship and Sustainability N2 - This article suggests an extended use of the case study methodology in teaching entrepreneurship in Germany. In Germany, the traditional form of formal lectures seems still to be predominant in Entrepreneurship Education. Case studies as a teaching methodology can serve the many dualities of Entrepreneurship Education: heterogeneous vs. homogeneous prior knowledge of participants, participants’ divergent interests in entrepreneurship courses, from simply collecting credits to theoretical interest to practical and urgent interest in practical skills for starting a venture. The advantages of case study based teaching methodology in transmitting theoretical knowledge as well as practical skills in entrepreneurship is described, based on the evidence in state of the art entrepreneurship research literature. A small explorative survey on case studies in Entrepreneurship Education is presented. Descriptive results generate insights in students perspective on the usefulness of the case study based teaching methodology in comparison with traditional lectures and provide hints for a more elaborated future empirical study that could employ a proper model on the effectiveness and advantages of case study based learning. The authors conclude in encouraging an increase in the usage of case study based teaching in Entrepreneurship Education especially in Germany. Y1 - 2013 UR - https://www.researchgate.net/publication/280598026_Entrepreneurship_Education_between_Theory_and_Practice_Reflections_on_Case_Study_Based_Teaching VL - 9 IS - 1 SP - 57 EP - 94 PB - RossiSmith Academic ER -