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We study Frege proofs using depth-d Boolean formulas for the Tseitin contradiction on n \times n grids. We prove that if each line in the proof is of size M, then the number of lines is exponential in n/(log M)O(d). This strengthens a recent result of Pitassi, Ramakrishman, and Tan [2022 IEEE 62nd Annual Symposium on Foundations of Computer Science, 2022, pp. 445-456]. The key technical step is a
Background The fundamental problem with the pavement marking letter design is dealing with the phenomenon of image distortion by perspective. Because there has been a lack of a systematic way to deal with the problem on Korean pavement marking letters, the outputs have been determined by the installer's subjective design judgement. Ultimately, this causes low legibility. The purpose of this study
Transitioning towards a circular economy, where the existing building stock is more efficiently used, would significantly reduce material and energy use, emissions, and waste from the built environment sector. This study focuses on exploring what conditions are needed for circularity by imagining preferable circular futures for a 2035 timeframe and understanding the required actions to achieve the
The aim of this paper is to discuss the unexploited forces of user-orientation and shared responsibility to promote sustainable value co-creation during service innovation projects in welfare service ecosystems. The framework is based on the theoretical field of public service logic (PSL) and our thesis is that service innovation seriously requires a user-oriented approach, and that such an approa
Background: Since the publication of the EULAR recommendations for the management of antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) in 2016, several randomised clinical trials have been published that have the potential to change clinical care and support the need for an update. Methods: Using EULAR standardised operating procedures, the EULAR task force undertook a systema
Abstract. Intended as food for thought this revue offers a general orientation on Alzheimer’s disease (AD) with comments on the brain changes and clinical features. But more importantly, it points out recent research findings which may offer new alleys for AD research pertinent to the etiology and pathogenesis of AD and alternatives to the so far rather unfruitful and costly amyloid research trail
Elements of the Ordovician conodont genus Protopanderodus have been investigated in order to provide a model of reconstruction for its oral apparatus. In total, 4202 elements from the five named species representing this genus in the Swedish Middle Ordovician are included in this study; P. rectus, P. parvibasis, P. graeai, P. robustus, and P. calceatus. The well-preserved specimens were studied in
The proportion of meals the Europeans eat outside their home steadily increases. We take coffee breaks at work, eat lunch in the office canteen, we order take-away, we go to cafés or pubs to spend time with our friends, we easily grab a snack in vending machines and we eat on airplanes and trains to just mention a few examples. Eating out is nowadays more of an everyday activity than a luxury even
Adoption of ECMR 4064/89 filled a lacuna in European Merger Control. One of the key objectives behind the ECMR is to prevent a concentration leading to the creation or strengthening of a dominant position which may lead to the prohibition in Article 2 (3).The Commission of the European Communities gained some significant powers in order to protect the competitive structure of Common Market. But, A
The European project has, since its birth in the 1950´s, transformed into a supranational organization with strong constitutional features. The current legal order of the Union has developed into a complex system that is hard to comprehend. Together with the enlargement eastwards, the need for a simplified European Treaty has been intensified. Today, the debate about a European constitution is a t
Created in the aftermath of the Second World War, the main task of the UN is the maintenance of international peace and security. Although the UN Charter, signed in San Francisco in 1945, has remained almost the same, the world has changed. In order to adapt the Charter to new upcoming problems two main possibilities exist. The Charter can either be changed itself, following the procedure set fort
We present high-power Yb:YAG lasers combined with nonlinear pulse compression in multi-pass cells. We show that these are suitable for integration in FEL facilities in terms of pulse stability, jitter, temporal contrast and intra-burst behaviour.
A continuous rotary membrane emulsification (cRME) system, allowing the decoupling of droplet generation from continuous phase (CP) flowrate, is presented here for the first time. The decoupling results in higher productivity and greater control compared to traditional crossflow and rotational membrane emulsification processes. A design of experiment (DoE) investigated the influence on droplet for
Amphiphilic polyoxometalate (POM) surfactants were prepared by covalently grafting double hydrophobic tails with chain lengths C12H25, C14H29, C16H33 or C18H37 onto the lacunary Wells-Dawson {P2W17O61} headgroup. The critical micelle concentrations (CMCs) of these novel surfactants in aqueous solutions were determined by conductivity, and micelle formation was studied by small angle neutron scatte
Background: The demographic shift is fast becoming a global challenge. Populations ageing rapidly is widely seen as one of the most powerful transformative forces affecting society over the next four decades.Due to the demographic challenge in most countries it is important to consider making working life sustainable. It is obvious that the main factor that distinguishes senior workers from other
