Nanophotonic hybridization of narrow atomic cesium resonances and photonic stop gaps of opaline nanostructures

We study a hybrid system consisting of a narrowband atomic optical resonance and the long-range periodic order of an opaline photonic nanostructure. To this end, we have infiltrated atomic cesium vapor in a thin silica opal photonic crystal. With increasing temperature, the frequencies of the opal's reflectivity peaks shift down by >20% due to chemical reduction of the silica. Simultaneously, the photonic bands and gaps shift relative to the fixed near-infrared cesium D1 transitions. As a result the narrow atomic resonances with high finesse (f/df=8E5) dramatically change shape from a usual dispersive shape at the blue edge of a stop gap, to an inverted dispersion lineshape at the red edge of a stop gap. The lineshape, amplitude, and off-resonance reflectivity are well modeled with a transfer-matrix model that includes the dispersion and absorption of Cs hyperfine transitions and the chemically-reduced opal. An ensemble of atoms in a photonic crystal is an intriguing hybrid system that features narrow defect-like resonances with a strong dispersion, with potential applications in slow light, sensing and optical memory.Comment: 8 pages, 6 figure

Gérer les responsabilités sociales des entreprises envers leurs parties prenantes

Différents groupes de parties prenantes attendent des entreprises qu’elles jouent un rôle plus important dans la résolution des problèmes sociaux et environnementaux actuels. Gérer leurs responsabilités et leurs relations avec les groupes de parties prenantes est de plus en plus important pour les entreprises. Cependant, les études existantes ne donnent que des réponses limitées quant à la façon dont ces entreprises peuvent gérer leurs relations avec leurs parties prenantes. «Quelles pratiques responsables devraient être adoptées par les entreprises et estce que ces pratiques permettent d’améliorer leur performance sociale?» et «Y a-t-il des cultures organisationnelles permettant aux entreprises de mettre en place des pratiques responsables avec plus de succès?» sont des questions qui restent encore en suspend. Afin de répondre à ces questions, nous avons développé une enquête et recueilli des données auprès de 244 entreprises basées en Suisse

Programmable two-photon quantum interference in 10310^3 channels in opaque scattering media

We investigate two-photon quantum interference in an opaque scattering medium that intrinsically supports $10^6$ transmission channels. By adaptive spatial phase-modulation of the incident wavefronts, the photons are directed at targeted speckle spots or output channels. From $10^3$ experimentally available coupled channels, we select two channels and enhance their transmission, to realize the equivalent of a fully programmable $2\times2$ beam splitter. By sending pairs of single photons from a parametric down-conversion source through the opaque scattering medium, we observe two-photon quantum interference. The programmed beam splitter need not fulfill energy conservation over the two selected output channels and hence could be non-unitary. Consequently, we have the freedom to tune the quantum interference from bunching (Hong-Ou-Mandel-like) to antibunching. Our results establish opaque scattering media as a platform for high-dimensional quantum interference that is notably relevant for boson sampling and physical-key-based authentication

Psychological factors associated with changes in physical activity in Dutch people with type 2 diabetes under societal lockdown:A cross-sectional study

AIMS: To investigate changes in physical activity (PA) and psychological factors during societal lockdown in people with type 2 diabetes. METHODS: A cross‐sectional study among Dutch adults with type 2 diabetes. Data were collected using online questionnaires. A multivariate multinomial logistic regression was performed with change in PA during societal lockdown as outcome and perceived change in stress, anxiety, perceived risk for COVID‐19 infection, emotional well‐being and former PA status as determinants. RESULTS: Five hundred and sixty seven respondents filled out the questionnaire, 536 were included in the final analysis: mean age of 65.9 ± 7.9 years; mean diabetes duration 13.3 ± 8 years; 54% men; 47% reported no change in PA, 27% became less active and 26% became more active during societal lockdown. Participants who were more likely to become less active were participants who experienced more stress (OR: 2.27; 95% CI 1.25–4.13) or less stress (OR: 2.20; 95% CI 1.03–4.71). Participants who were more likely to become more active were participants who experienced more stress (OR: 2.31; 95% CI 1.25, 4.26). Participants with higher emotional well‐being (OR: 0.98; 95% CI 0.97, 0.99) were less likely to become less active than to report no change in PA. CONCLUSIONS: Changes in PA in people with type 2 diabetes during societal lockdown are associated with changes in psychological factors such as perceived stress and emotional well‐being. People with diabetes and their caregivers should be aware of these possible changes

The ACCOMPLISH study. A cluster randomised trial on the cost-effectiveness of a multicomponent intervention to improve hand hygiene compliance and reduce healthcare associated infections

Contains fulltext : 97410.pdf (publisher's version ) (Open Access)BACKGROUND: Public health authorities have recognized lack of hand hygiene in hospitals as one of the important causes of preventable mortality and morbidity at population level. The implementation strategy ACCOMPLISH (Actively Creating COMPLIance Saving Health) targets both individual and environmental determinants of hand hygiene. This study aims to evaluate the cost-effectiveness of a multicomponent implementation strategy aimed at the reduction of healthcare associated infections in Dutch hospital care, by promotion of hand hygiene. METHODS/DESIGN: The ACCOMPLISH package will be evaluated in a two-arm cluster randomised trial in 16 hospitals in the Netherlands, in one intensive care unit and one surgical ward per hospital. INTERVENTION: A multicomponent package, including e-learning, team training, introduction of electronic alcohol based hand rub dispensers and performance feedback. VARIABLES: The primary outcome measure will be the observed hand hygiene compliance rate, measured at baseline and after 6, 12 and 18 months; as a secondary outcome measure the prevalence of healthcare associated infections will be measured at the same time points. Process indicators of the intervention will be collected pre and post intervention. An ex-post economic evaluation of the ACCOMPLISH package from a healthcare perspective will be performed. STATISTICAL ANALYSIS: Multilevel analysis, using mixed linear modelling techniques will be conducted to assess the effect of the intervention strategy on the overall compliance rate among healthcare workers and on prevalence of healthcare associated infections. Questionnaires on process indicators will be analysed with multivariable linear regression, and will include both behavioural determinants and determinants of innovation. Cost-effectiveness will be assessed by calculating the incremental cost-effectiveness ratio, defined here as the costs for the intervention divided by the difference in prevalence of healthcare associated infections between the intervention and control group. DISCUSSION: This study is the first RCT to investigate the effects of a hand hygiene intervention programme on the number of healthcare associated infections, and the first to investigate the cost-effectiveness of such an intervention. In addition, if the ACCOMPLISH package proves successful in improving hand hygiene compliance and lowering the prevalence of healthcare associated infections, the package could be disseminated at (inter)national level. TRIAL REGISTRATION: NTR2448

A search for resonances decaying into a Higgs boson and a new particle X in the XH→qqbb final state with the ATLAS detector

A search for heavy resonances decaying into a Higgs boson ($H$) and a new particle ($X$) is reported, utilizing 36.1 fb$^{-1}$ of proton-proton collision data at $\sqrt{s} =$ 13 TeV collected during 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. The particle $X$ is assumed to decay to a pair of light quarks, and the fully hadronic final state $XH \rightarrow q\bar q'b\bar b$ is analysed. The search considers the regime of high $XH$ resonance masses, where the $X$ and $H$ bosons are both highly Lorentz-boosted and are each reconstructed using a single jet with large radius parameter. A two-dimensional phase space of $XH$ mass versus $X$ mass is scanned for evidence of a signal, over a range of $XH$ resonance mass values between 1 TeV and 4 TeV, and for $X$ particles with masses from 50 GeV to 1000 GeV. All search results are consistent with the expectations for the background due to Standard Model processes, and 95% CL upper limits are set, as a function of $XH$ and $X$ masses, on the production cross-section of the $XH\rightarrow q\bar q'b\bar b$ resonance

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

Strategic Alliance Management

Strategic Alliance Management presents an academically grounded alliance development framework, detailing eight stages of alliance development with consideration for specific management challenges. For each stage, readers are presented with theoretical insights, evidence-based managerial guidelines and a business case illustration. Other chapters consider alliance attributes, alliance competences, and alliance challenges, and cover topics such as innovation, co-branding, co-opetition, business ecosystems, alliance professionals, alliance capabilities, societal alliances and a tension-based alliance mindset.This fully revised 3rd edition leverages the book’s strengths in marrying theory with practical insight. All the chapters have been updated to reflect the current academic literature, whilst new international case studies are incorporated throughout. Two new chapters feature in this edition, considering the importance of the mindset required to successfully navigate alliance arrangements, and emerging alliance practices, exploring how new technologies, sustainability and the external environment have disrupted alliance management. In-chapter text boxes discussing emerging themes provide opportunity for discussion and analysis.The textbook remains highly valuable core and recommended reading for postgraduate students of Strategic Management and Corporate Strategy, MBA and Executive MBA, as well as reflective practitioners in the field. Online resources include chapter-by-chapter lecture slides, two long case studies and short interviews with alliance executives

Strategic alliance management

Strategic alliances - voluntary, long-term collaborations between firms to achieve their objectives - are attracting increasing attention in business schools because of their growing prevalence among organizations today. Mastering the art of managing strategic alliances allows firms to radically improve their performance and this book provides a detailed, evidence-based approach outlining the design, management, and evaluation of these alliances. Elaborating on the decision-making structures apparent during each stage in the alliance life-cycle and in elucidating cases from across the world, Strategic Alliance Management offers a systematic framework that provides insights into the development and deployment of alliances. Concluding with the three alliance paradoxes managers must address to design and manage their alliances effectively and efficiently, this text offers a profound vision of the key decision-making rationales and processes inherently related to strategic alliances. As such, it will be required reading for students studying the subject and a valuable supplementary reading source to those studying strategic management more generally. A website run by the authors, can be found here: http://www.strategic-alliance-management.com

Strategic Alliance Management

Manajemen Aliansi Strategis menyajikan kerangka kerja pengembangan aliansi yang didasarkan secara akademis, mencakup delapan tahap pengembangan aliansi. Manajemen aliansi ini dijelaskan mulai dari awal pembuatan strategi aliansi, memilih partner, negoisasi, dll. Untuk setiap tahap, penulis menyajikan wawasan teoritis, pedoman manajerial berbasis bukti dan ilustrasi kasus bisnis yang mengkolaborasikan teori dengan wawasan praktis.xv, 453 p ; il