248 research outputs found
Looking for Guidance? Five Principles for Leveraging Tensions in Corporate–Startup Collaboration
Corporate–startup collaboration (CSC) allows the co-development of innovations for pressing societal needs. Paradoxically, CSC is both fueled and challenged by diverging interests and approaches of the unequal actors. We apply a paradox lens to better understand the complex collaborative demands of CSC from the perspective of the corporate actors involved. Over the course of three years, we conducted 52 contextualized semi-structured interviews in a corporate-sponsored accelerator pursuing sustainability improvements. We identify five CSC paradoxes, which we translate into guiding principles for managing such paradoxes with a both/and mindset. Further, we show how these guiding principles help to address interdependencies between the CSC paradoxes. By disentangling the inherently paradoxical nature of the collaborative demands, we contribute to a fuller theoretical understanding of how organizational actors can manage these demands. We encourage companies engaging in CSC to use the guiding principles for empowering organizational actors’ understanding and approaches to CSC paradoxes
Vom Paradox zur Resilienz in der Krise : ein Modell für erfolgreiches Krisenmanagement
In diesem konzeptuellen Beitrag für die Zeitschrift Gruppe. Interaktion. Organisation. wird erfolgreiches Krisenmanagement als Weg von paradoxen Spannungen in der Krise zur Resilienz der Organisation beschrieben. Widersprüchliche und doch miteinander verbundene Interessen, Bedürfnisse und Anforderungen in der aktuellen COVID-19 Pandemie dienen als Beispiele. Das Modell betont die Rolle eines paradoxen Mindsets, welches Führungskräften, Entscheidern und Betroffenen ermöglicht, paradoxe Spannungen als solche zu erkennen, anzunehmen und die Chancen im „sowohl-als auch“ (im Gegensatz zu „entweder-oder“) zu finden. Das paradoxe Mindset fördert die Auseinandersetzung mit den Spannungen in einem wiederkehrenden Prozess des Sinnfindens und Sinnstiftens. Dieser Prozess stößt im Austausch mit den unterschiedlichen Stakeholdern die Entwicklung gemeinsamer „sowohl-als auch“ Denkmodelle, kreativer Herangehensweisen und schrittweisen Lernens an. Somit stärkt die paradoxe Sichtweise die Fähigkeit von Organisationen konstruktiv mit Herausforderungen umzugehen und diese in Chancen zu verwandeln – es macht sie resilienter. Der Beitrag schließt mit drei zusammenfassenden Empfehlungen für das Krisenmanagement
The Empty Chair Appointment
The objective was to test an intervention to reduce failed rates for psychiatric appointments. We collected data for this study of the characteristics of patients who missed appointments from March 2011 through September 2012. A phone triage assessment intervention was implemented to address chronic first-time failed attendance appointments (N = 78). The main reason for failed appointments was transportation difficulties. The first-time appointment show rate increased after implementing an assessment intervention. Phone assessment intervention was practical and may improve nonattendance for psychiatric appointments. The discussion reflects speculations about causes and possible measures to make services more accessible
Paradoxical leadership as sensegiving : stimulating change-readiness and change-oriented performance
Purpose: Paradoxical leadership (PL) is an emerging perspective to understand how leaders help followers deal with paradoxical demands. Recently, the positive relationship between PL and follower performance was established. We build on and extend this research by (1) interpreting PL as sensegiving and (2) developing theory about mediation in the relationship between PL and adaptive and proactive performance.
Design/methodology/approach: We develop a new measure for PL as sensegiving. We provide a test of our mediation model with data from two different sources and two measurement times in a German company.
Findings: Multilevel mediation analysis (N = 154) supports our mediation model.
Originality/value: We present sensegiving about paradox as a core element of PL, which informs the choice of change-readiness as mediator. We develop and validate a scale to measure PL in future research
Secondary nucleation of monomers on fibril surface dominates -synuclein aggregation and provides autocatalytic amyloid amplification
Parkinson’s disease (PD) is characterized by proteinaceous aggregates named Lewy Bodies and Lewy Neurites containing -synuclein fibrils. The underlying aggregation mechanism of this protein is dominated by a secondary process at mildly acidic pH, as in endosomes and other organelles. This effect manifests as a strong acceleration of the aggregation in the presence of seeds and a weak dependence of the aggregation rate on monomer concentration. The molecular mechanism underlying this process could be nucleation of monomers on fibril surfaces or fibril fragmentation. Here, we aim to distinguish between these mechanisms. The nature of the secondary processes was investigated using differential sedimentation analysis, trap and seed experiments, quartz crystal microbalance experiments and super-resolution microscopy. The results identify secondary nucleation of monomers on the fibril surface as the dominant secondary process leading to rapid generation of new aggregates, while no significant contribution from fragmentation was found. The newly generated oligomeric species quickly elongate to further serve as templates for secondary nucleation and this may have important implications in the spreading of PD.This work was supported by the Swedish Research Council and its Linneaus Centers for Organizing Molecular Matter (E. Sparr and S. Linse), the European Research Council (S. Linse), Nanolund (S. Linse), Multipark (S. Linse and R. Gaspar), the Leverhulme Trust (A. Buell), Magdalene College, Cambridge (A. Buell), the Parkinson’s and Movement Disorder Foundation (A. Buell), EPSRC (C.F. Kaminski), MRC (C.F. Kaminski) and Wellcome Trust UK (C.F. Kaminski)
The Lived Experience of Paradox:How Individuals Navigate Tensions during the Pandemic Crisis
This is a dialogue and part of an article series involving many authors. </p
First Observation of Self-Amplified Spontaneous Emission in a Free-Electron Laser at 109 nm Wavelength
We present the first observation of Self-Amplified Spontaneous Emission
(SASE) in a free-electron laser (FEL) in the Vacuum Ultraviolet regime at 109
nm wavelength (11 eV). The observed free-electron laser gain (approx. 3000) and
the radiation characteristics, such as dependency on bunch charge, angular
distribution, spectral width and intensity fluctuations all corroborate the
existing models for SASE FELs.Comment: 6 pages including 6 figures; e-mail: [email protected]
Insights from birthing experiences of fistula survivors in North-central Nigeria: Interplay of structural violence
Obstetric Fistula is an abnormal opening between the vagina and rectum resulting from prolonged and obstructed labour. Studies indicate that delays in accessing maternal care and home birth contribute to the development of fistula. Survivors are usually women of low socioeconomic status residing in rural locations. This study explores the birthing experiences of 15 fistula survivors through a narrative inquiry approach at a repair centre in North-central Nigeria. Using structural violence as a lens, it describes the role of social, political and health systems in the inequitable access to care for women. For women opting for home births, preference for home delivery was mainly due to lack of finances, poor health systems and cultural practices. Rural location inhibited access as, women seeking facility delivery faced transfer delays to referral centres when complications developed. Inequitable maternal health services in rural locations in Nigeria are inherently linked to access to health care; and these contribute to the increased incidences of fistulae. Structural intervention is a health policy priority to address poor health systems and achieve universal health coverage to address maternal health issues in Nigeria
Self-consistent field theory for the interactions between keratin intermediate filaments
Background: Keratins are important structural proteins found in skin, hair and nails. Keratin Intermediate Filaments are major components of corneocytes, nonviable horny cells of the Stratum Corneum, the outermost layer of skin. It is considered that interactions between unstructured domains of Keratin Intermediate Filaments are the key factor in maintaining the elasticity of the skin.
Results: We have developed a model for the interactions between keratin intermediate filaments based on self-consistent field theory. The intermediate filaments are represented by charged surfaces, and the disordered terminal domains of the keratins are represented by charged heteropolymers grafted to these surfaces. We estimate the system is close to a charge compensation point where the heteropolymer grafting density is matched to the
surface charge density. Using a protein model with amino acid resolution for the terminal domains, we find that the terminal chains can mediate a weak attraction between the keratin surfaces. The origin of the attraction is a combination of bridging and electrostatics. The attraction disappears when the system moves away from the charge compensation point, or when excess small ions and/or NMF-representing free amino acids are added.
Conclusions: These results are in concordance with experimental observations, and support the idea that the interaction between keratin filaments, and ultimately in part the elastic properties of the keratin-containing tissue, is controlled by a combination of the physico-chemical properties of the disordered terminal domains and the composition of the medium in the inter-filament region.
Keywords: Stratum corneum, Skin keratins, Intermediate filaments, Unstructured terminal domains, Bridging attractio
The role of the disulfide bond in the interaction of islet amyloid polypeptide with membranes
Human islet amyloid polypeptide (hIAPP) forms amyloid fibrils in pancreatic islets of patients with type 2 diabetes mellitus. It has been suggested that the N-terminal part, which contains a conserved intramolecular disulfide bond between residues 2 and 7, interacts with membranes, ultimately leading to membrane damage and β-cell death. Here, we used variants of the hIAPP1–19 fragment and model membranes of phosphatidylcholine and phosphatidylserine (7:3, molar ratio) to examine the role of this disulfide in membrane interactions. We found that the disulfide bond has a minor effect on membrane insertion properties and peptide conformational behavior, as studied by monolayer techniques, 2H NMR, ThT-fluorescence, membrane leakage, and CD spectroscopy. The results suggest that the disulfide bond does not play a significant role in hIAPP–membrane interactions. Hence, the fact that this bond is conserved is most likely related exclusively to the biological activity of IAPP as a hormone
- …