Explanipedia

Tree Height and the Asymptotic Mean of the Colijn–Plazzotta Rank of Unlabeled Binary Rooted Trees Open

Luc Devroye, Michael R. Doboli, Noah A. Rosenberg, Stephan M. Wagner · 2025

Charting the Future of Blockchain in Operations and Supply Chain Management: Opportunities and Challenges Open

Fabrice Lumineau, Guangzhi Shang, Jayashankar M. Swaminathan, Gerry Tsoukalas, Stephan M. Wagner , et al. · 2025

Supporting Intellectual Property Protection: Blockchain Technology as a Catalyst for Open Innovation Open

Stephan M. Wagner, Alexander Fink, Jonas Fabian Ehrnsperger, Philipp Düpree · 2025

As the access, sharing, and transfer of intellectual property (IP) are central to open innovation (OI) projects, preventing the leakage of IP is critical. The emergence of blockchain has prompted organizations to seek support from this tec…

The Flying Sidekick Traveling Salesman Problem with Multiple Drops: An Effective Heuristic Approach Open

Schaumann Sarah, Abhishake Kundu, Pina Pardo Juan Carlos, Matthias Winkenbach, Ricardo A. Gatica , et al. · 2025

Trees maximizing the number of almost-perfect matchings Open

Stijn Cambie, B. K. McCoy, Gunjan Sharma, Stephan M. Wagner, Corrine Yap · 2025

We characterize the extremal trees that maximize the number of almost- perfect matchings, which are matchings covering all but one or two vertices, and those that maximize the number of strong almost-perfect matchings, which are matchings …

Safe and sustainable by design of next generation chemicals and materials: SSbD4CheM project innovations in the textiles, cosmetic and automotive sectors Open

Mansoor Ahmad Bhat, Tanja Radu, Ignacio Martín-Fabiani, Panagiotis D. Kolokathis, Anastasios G. Papadiamantis , et al. · 2025

The strategic objective of the Safe and sustainable by design of next generation chemicals and materials (SSbD4CheM) project is to develop screening and testing strategies for a variety of substances and materials to ensure safer and more …

The Minimum Number of Maximal Independent Sets in Twin-Free Graphs Open

Stijn Cambie, Stephan M. Wagner · 2024

The problem of determining the maximum number of maximal independent sets in certain graph classes dates back to a paper of Miller and Muller and a question of Erdős and Moser from the 1960s. The minimum was always considered to be less in…

Tree height and the asymptotic mean of the Colijn-Plazzotta rank of unlabeled binary rooted trees Open

Luc Devroye, Michael R. Doboli, Noah A. Rosenberg, Stephan M. Wagner · 2024

The Colijn--Plazzotta ranking is a bijective encoding of the unlabeled binary rooted trees with positive integers. We show that the rank $f(t)$ of a tree $t$ is closely related to its height $h$, the length of the longest path from a leaf …

Media Reporting of Environmental Supply Chain Sustainability Risks: Contextual and Moderating Factors Open

Ivana Mateska, Stephan M. Wagner, Laura Stienen · 2024

Ethical and sustainable business practices in global supply chains have become a major concern for firms. Media stakeholders hold firms accountable for the environmentally unethical behavior of their suppliers. Based on agenda-setting theo…

Keys to Success for an Alternative Grading Scheme in a Large Enrollment Differential Equations Course Open

Hadas Ritz, Stephan M. Wagner · 2024

In this work-in-progress paper, we describe the key changes we made to our efforts to implement a standards-based, mastery-based grading scheme in a large enrollment Differential Equations course at an R1 university. In this continuation o…

Owner-operator experience and violations in trucking: The mixed role of perceived justice Open

Seongtae Kim, Arim Park, Stephan M. Wagner · 2024

Monomial identities in the Weyl algebra Open

Darij Grinberg, Tom Roby, Stephan M. Wagner, Mei Yin · 2024

Motivated by a question and some enumerative conjectures of Richard Stanley, we explore the equivalence classes of words in the Weyl algebra, $\mathbf{k} \left< D,U \mid DU - UD = 1 \right>$. We show that each class is generated by the swa…

The flying sidekick traveling salesman problem with multiple drops: A simple and effective heuristic approach Open

Sarah K. Schaumann, Abhishake Kundu, Juan C. Pina-Pardo, Matthias Winkenbach, Ricardo A. Gatica , et al. · 2024

We study the Flying Sidekick Traveling Salesman Problem with Multiple Drops (FSTSP-MD), a multi-modal last-mile delivery model where a single truck and a single drone cooperatively deliver customer packages. In the FSTSP-MD, the drone can …

Bounding Mean Orders of Sub-$k$-Trees of $k$-Trees Open

Stijn Cambie, B. K. McCoy, Stephan M. Wagner, Corrine Yap · 2024

For a $k$-tree $T$, we prove that the maximum local mean order is attained in a $k$-clique of degree $1$ and that it is not more than twice the global mean order. We also bound the global mean order if $T$ has no $k$-cliques of degree $2$ …

Microfoundations of dynamic new venture partnering capabilities Open

Stephan M. Wagner, Stefan Kurpjuweit · 2024

Managing relationships with new venture suppliers require the adaptation of supplier management practices and routines. This research builds upon the dynamic capabilities perspective to explicate the ability to partner effectively with new…

Hotspots of Floating Plastic Particles across the North Pacific Ocean Open

Robby Rynek, Mine Banu Tekman, Christoph Rummel, Melanie Bergmann, Stephan M. Wagner , et al. · 2024

The pollution of the marine environment with plastic debris is expected to increase, where ocean currents and winds cause their accumulation in convergence zones like the North Pacific Subtropical Gyre (NPSG). Surface-floating plastic (>33…

Exploring the physical–digital interface in blockchain applications: Insights from the luxury watch industry Open

Maximilian Klöckner, Christoph G. Schmidt, Alexander Fink, Leonie Flückiger, Stephan M. Wagner · 2023

Bounding mean orders of sub-$k$-trees of $k$-trees Open

Stijn Cambie, B. K. McCoy, Stephan M. Wagner, Corrine Yap · 2023

For a $k$-tree $T$, we prove that the maximum local mean order is attained in a $k$-clique of degree $1$ and that it is not more than twice the global mean order. We also bound the global mean order if $T$ has no $k$-cliques of degree $2$ …

Sustainability‐related transgressions in global supply chains: When do legitimacy spillovers hurt buying firms the most? Open

Ivana Mateska, Christian Busse, Andrew Kach, Stephan M. Wagner · 2023

In a globalized world, buying firms increasingly face criticism regarding sustainability‐related transgressions in their supply chains, yet scholarship concerning whether such negative press has any bottom‐line effects has only just begun …

Issue Information Open

Kyungmin Park, Stephanie Lee, Shahryar Doosti, Yong Tan, Wei Zhang , et al. · 2023

Social embeddedness and supply chains: Doing business

The distribution of the maximum protection number in simply generated trees Open

Clemens Heuberger, Sarah J. Selkirk, Stephan M. Wagner · 2023

The protection number of a vertex $v$ in a tree is the length of the shortest path from $v$ to any leaf contained in the maximal subtree where $v$ is the root. In this paper, we determine the distribution of the maximum protection number o…

Route efficiency implications of time windows and vehicle capacities in first- and last-mile logistics Open

Sarah K. Schaumann, Felix M. Bergmann, Stephan M. Wagner, Matthias Winkenbach · 2023

Just‐in‐time for supply chains in turbulent times Open

Thomas Y. Choi, Torbjørn H. Netland, Nada R. Sanders, ManMohan S. Sodhi, Stephan M. Wagner · 2023

The Covid‐19 pandemic and other recent disruptions in the early 2020s led to sections in the business press blaming just‐in‐time (JIT) practices for operational failings. Consequently, there are calls for moving away from JIT toward holdin…

Enumeration of Generalized Dyck Paths Based on the Height of Down-Steps Modulo $k$ Open

Clemens Heuberger, Sarah J. Selkirk, Stephan M. Wagner · 2023

For fixed non-negative integers $k$, $t$, and $n$, with $t < k$, a $k_t$-Dyck path of length $(k+1)n$ is a lattice path that starts at $(0, 0)$, ends at $((k+1)n, 0)$, stays weakly above the line $y = -t$, and consists of steps from the st…

Supply chain capabilities and new venture growth Open

Stephan M. Wagner, Ingmar Zanger · 2023

We build on dynamic capability (DC) theory and apply inductive case study research to shed light on how new venture manufacturing firms develop and nurture supply chain (SC) capabilities. Our findings discern SC capabilities related to dim…

Firms’ responses to the COVID-19 pandemic Open

Maximilian Klöckner, Christoph G. Schmidt, Stephan M. Wagner, Morgan Swink · 2023

Issue Information Open

Toru Hasunuma, Peter Lambert‐Cole, Danielle O’Donnol, Alex Scott, Paul Seymour , et al. · 2023

The Uncover Process for Random Labeled Trees Open

Benjamin Hackl, Alois Panholzer, Stephan M. Wagner · 2023

We consider the process of uncovering the vertices of a random labeled tree according to their labels. First, a labeled tree with $n$ vertices is generated uniformly at random. Thereafter, the vertices are uncovered one by one, in order of…

The Role of Metacognitive Capabilities in Knowledge Creation in Supply Chain Relationships Open

Young Sik Cho, Kevin Linderman, Stephan M. Wagner · 2023

The root cluster after percolation on preferential attachment trees Open

Colin Desmarais, Cecilia Holmgren, Stephan M. Wagner · 2023

The class of linear preferential attachment trees includes recursive trees, plane-oriented recursive trees, binary search trees, and increasing $d$-ary trees. Bond percolation with parameter $p$ is performed by considering every edge in a …

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