Miracle-dz/UniFAR-FTUs huggingface dataset:
INVESTIGATING CULTURAL AND STRUCTURAL INFLUENCES ON OPTIMISING ENGINEER-TO-ORDER PROJECT DELIVERY AND SUSTAINABILITY

Several culture theories, which explain the formation, embedment, and propagation of organisational culture, suggest that certain organisational culture practices of an executing organisation may enable sustainable outcomes in project manufacturing. However, practices that support sustainability may not support project delivery, and vice versa. We explore the effects of organisational culture practices and structural complexity on the ability of manufacturing projects to optimise both sustainability and project delivery. We use data envelopment analysis (DEA) to calculate a sustainability-delivery quotient – a measure of each organisation’s ability to optimise both sustainability and project delivery outcomes – for 186 projects conducted in the UK. By conducting generalised linear modelling and censored regression of the sustainability-delivery quotient, we estimate the effects of the GLOBE organisational culture dimensions, principal components of culture dimensions, and project structural complexity indicators. Results indicate a noteworthy gap between the delivery of projects and their sustainability performance, which is worse. Both institutional and in-group collectivism may support the optimisation of each. However, neither the principal components of culture dimensions nor structural complexity indicators are likely to be significant. We discuss the managerial implications. The intensified spotlight on sustainability comes with recognising the challenge in achieving it alongside other, often conflicting, business goals. We examine this conundrum within the context of project manufacturing. We investigate the effects of organisational culture practices and structural complexity on the ability of engineer-to-order projects to optimise both sustainability and project delivery. Our key finding is that both in-group and institutional collectivism culture practices may support attempts to optimise both sustainability and project delivery. Our findings are most relevant managerially at the strategic planning level within project-based organisations, whose core business model is project manufacturing. The results indicate that a strategy to pursue, if they wish to optimise both project delivery and sustainability, is to foster in-group and institutional collectivism organisational culture practices, particularly if self-evaluation identifies such a weakness or absence of these. Yet our results also have more general managerial relevance: Our survey indicates sustainability performance is poor relative to project delivery, which suggests the project manufacturing field has some way to go before sustainability is deeply imbedded and realised in projects.
HALF-SPACE MACDONALD PROCESSES

Macdonald processes are measures on sequences of integer partitions built using the Cauchy summation identity for Macdonald symmetric functions. These measures are a useful tool to uncover the integrability of many probabilistic systems, including the Kardar–Parisi–Zhang (KPZ) equation and a number of other models in its universality class. In this paper, we develop the structural theory behind half-space variants of these models and the corresponding half-space Macdonald processes. These processes are built using a Littlewood summation identity instead of the Cauchy identity, and their analysis is considerably harder than their full-space counterparts. We compute moments and Laplace transforms of observables for general half-space Macdonald measures. Introducing new dynamics preserving this class of measures, we relate them to various stochastic processes, in particular the log-gamma polymer in a half-quadrant (they are also related to the stochastic six-vertex model in a half-quadrant and the half-space ASEP). For the polymer model, we provide explicit integral formulas for the Laplace transform of the partition function. Nonrigorous saddle-point asymptotics yield convergence of the directed polymer free energy to either the Tracy–Widom (associated to the Gaussian orthogonal or symplectic ensemble) or the Gaussian distribution depending on the average size of weights on the boundary.
Restoration strategy drives the leaf litter myriapod richness (Arthropoda: Myriapoda) on a protected area

Objective: To determine the leaf litter myriapod community in two restoration strategies of a protective area of Colombia, a secondary forest and an Andean alder plantation. Scope: The knowledge of the biodiversity of invertebrates associated with leaf litter breakdown in restoration forests may contribute to assessing the restoration process efficiency and success. Within this forested soil biodiversity framework, myriapods influence organic matter dynamics by transforming leaf litter (or other plant-derived materials), reducing the surface of decomposition, and affecting decomposer communities and their interactions. Methodology: We designed a leaf litter translocation experiment using leaf litter of Alnus acuminata Kunth and Hedyosmum bonplandianum Kunth, the most abundant species in each restoration strategy underway from the 60s in the Reserva Natural Río Blancoy Quebrada Olivares, Manizales, Colombia. We measured the myriapod richness and abundance two and four months after beginning the leaf litter decomposition experimental trials. Main results: Classes Diplododa, Chilopoda, and Symphyla colonized the leaf litter in both restoration strategies. The restoration strategy affected myriapod richness, abundance and composition. Myriapod richness and abundance were greater in the Andean alder plantation, millipedes were the most abundance myriapods. Myriapod composition also differs among litter species. The plant composition of each restoration strategy could lead to differences in litterfall quality and, consequently, in the resources available for the colonization of the myriapod community, which contributes directly and indirectly to the decomposition process in the restoration strategies.
Signature Calculation of Area Hermitian Form on Some Spaces of Polygons

This chapter is motivated by the paper by Thurston on triangulations of the sphere and singular flat metrics on the sphere. Thurston locally parametrized the moduli space of singular flat metrics on the sphere with prescribed positive curvature data by the complex hyperbolic space of appropriate dimension. This work can be considered as a generalization of signature calculation of the Hermitian form that he made in his paper. The moduli space of singular flat metrics having unit area on the sphere with prescribed curvature data can be locally parametrized by certain spaces of polygons. This can be done by cutting singular flat spheres through length minimizing geodesics from a fixed singular point to the others. In that case the space of polygons is a complex vector space of dimension n− 1 when there are n + 1 singular points. Also there is natural area Hermitian form of signature (1, n−2) on this vector space. In this chapter we calculate the signature of the area Hermitian form on some spaces of polygons which locally parametrize the moduli space of singular flat metrics having unit area on the sphere with one singular point of negative curvature. The formula we obtain depends only on the sum of the curvatures of the singular points having positive curvature. ∗Electronic address: isaglamtrfr@gmail.com 1 ar X iv :1 80 3. 03 64 0v 4 [ m at h. M G ] 1 0 D ec 2 02 1 This paper will appear in the book ”In the tradition of Thurston, Vol. II”, Springer, 2022.
Non asymptotic variance bounds and deviation inequalities by optimal transport

The purpose of this note is to show how simple optimal transport arguments, on the real line, can be used in Superconcentration theory. As such, we derive non- asymptotic sharp variance bounds for various functionals (maximum, median, lp norms) of standard Gaussian random vectors. The flexibility of this approach can also provide exponential deviation inequalities reflecting preceding variance bounds. As a further illustration of the methodology, usual laws for extreme theory and Coulomb gases are studied.
The slowly pulsating B-star 18 Pegasi: A testbed for upper main sequence stellar evolution

The predicted width of the upper main sequence in stellar evolution models depends on the empirical calibration of the convective overshooting parameter. Despite decades of discussions, its precise value is still unknown and further observational constraints are required to gauge it. Based on a photometric and preliminary asteroseismic analysis, we show that the mid B-type giant 18 Peg is one of the most evolved members of the rare class of slowly pulsating B-stars and, thus, bears tremendous potential to derive a tight lower limit for the width of the upper main sequence. In addition, 18 Peg turns out to be part of a single-lined spectroscopic binary system with an eccentric orbit that is greater than 6 years. Further spectroscopic and photometric monitoring and a sophisticated asteroseismic investigation are required to exploit the full potential of this star as a benchmark object for stellar evolution theory.
Discontinuity of the phase transition for the planar random-cluster and Potts models with $q>4$

We prove that the $q$-state Potts model and the random-cluster model with cluster weight $q>4$ undergo a discontinuous phase transition on the square lattice. More precisely, we show - Existence of multiple infinite-volume measures for the critical Potts and random-cluster models, - Ordering for the measures with monochromatic (resp. wired) boundary conditions for the critical Potts model (resp. random-cluster model), and - Exponential decay of correlations for the measure with free boundary conditions for both the critical Potts and random-cluster models. The proof is based on a rigorous computation of the Perron-Frobenius eigenvalues of the diagonal blocks of the transfer matrix of the six-vertex model, whose ratios are then related to the correlation length of the random-cluster model. As a byproduct, we rigorously compute the correlation lengths of the critical random-cluster and Potts models, and show that they behave as $\exp(\pi^2/\sqrt{q-4})$ as $q$ tends to 4.
Algebraic cobordism and étale
cohomology

Thomason's \'{e}tale descent theorem for Bott periodic algebraic $K$-theory \cite{aktec} is generalized to any $MGL$ module over a regular Noetherian scheme of finite dimension. Over arbitrary Noetherian schemes of finite dimension, this generalizes the analog of Thomason's theorem for Weibel's homotopy $K$-theory. This is achieved by amplifying the effects from the case of motivic cohomology, using the slice spectral sequence in the case of the universal example of algebraic cobordism. We also obtain integral versions of these statements: Bousfield localization at \'etale motivic cohomology is the universal way to impose \'etale descent for these theories. As applications, we describe the \'etale local objects in modules over these spectra and show that they satisfy the full six functor formalism, construct an \'etale descent spectral sequence converging to Bott-inverted motivic Landweber exact theories, and prove cellularity and effectivity of the \'{e}tale versions of these motivic spectra.
Relative equilibrium states and class degree

Given a factor code $\unicode[STIX]{x1D70B}$ from a shift of finite type $X$ onto a sofic shift $Y$ , an ergodic measure $\unicode[STIX]{x1D708}$ on $Y$ , and a function $V$ on $X$ with sufficient regularity, we prove an invariant upper bound on the number of ergodic measures on $X$ which project to $\unicode[STIX]{x1D708}$ and maximize the measure pressure $h(\unicode[STIX]{x1D707})+\int V\,d\unicode[STIX]{x1D707}$ among all measures in the fiber $\unicode[STIX]{x1D70B}^{-1}(\unicode[STIX]{x1D708})$ . If $\unicode[STIX]{x1D708}$ is fully supported, this bound is the class degree of $\unicode[STIX]{x1D70B}$ . This generalizes a previous result for the special case of $V=0$ and thus settles a conjecture raised by Allahbakhshi and Quas.
Backward SDEs and infinite horizon stochastic optimal control

We study an optimal control problem on infinite horizon for a controlled stochastic differential equation driven by Brownian motion, with a discounted reward functional. The equation may have memory or delay effects in the coefficients, both with respect to state and control, and the noise can be degenerate. We prove that the value, i.e. the supremum of the reward functional over all admissible controls, can be represented by the solution of an associated backward stochastic differential equation (BSDE) driven by the Brownian motion and an auxiliary independent Poisson process and having a sign constraint on jumps. In the Markovian case when the coefficients depend only on the present values of the state and the control, we prove that the BSDE can be used to construct the solution, in the sense of viscosity theory, to the corresponding Hamilton-Jacobi-Bellman partial differential equation of elliptic type on the whole space, so that it provides us with a Feynman-Kac representation in this fully nonlinear context. The method of proof consists in showing that the value of the original problem is the same as the value of an auxiliary optimal control problem (called randomized), where the control process is replaced by a fixed pure jump process and maximization is taken over a class of absolutely continuous changes of measures which affect the stochastic intensity of the jump process but leave the law of the driving Brownian motion unchanged.
Simultaneous dual-species matter-wave accelerometer

We report the realization of a matter-wave interferometer based on Raman transitions which simultaneously interrogates two different atomic species ($^{87}$Rb and $^{85}$Rb). The simultaneous aspect of our experiment presents encouraging preliminary results for future dual-species atom interferometry projects and seems very promising by taking advantage of a differential acceleration measurement. Indeed the resolution of our differential accelerometer remains lower than $3.9\times 10^{-8}g$ even with vibration levels up to $1\times10^{-3}g$ thanks to common-mode vibration noise rejection . An atom based test of the Weak Equivalence Principle has also been carried out leading to a differential free fall measurement between both isotopes of $\Delta g/g = (1.2 \pm 3.2)\times10^{-7}$.
Relative Perturbation Theory for Quadratic Eigenvalue Problems

In this paper, we derive new relative perturbation bounds for eigenvectors and eigenvalues for regular quadratic eigenvalue problems of the form λ 2 Mx + λCx + Kx = 0, where M and K are nonsingular Hermitian matrices and C is a general Hermitian matrix. We base our findings on new results for an equivalent regular Hermitian matrix pair A − λB. The new bounds can be applied to many interesting quadratic eigenvalue problems appearing in applications, such as mechanical models with indefinite damping. The quality of our bounds is demonstrated by several numerical experiments.
Interactions of Grid-Forming Power Converters and Synchronous Machines -- A Comparative Study

An inevitable consequence of the global power system transition towards nearly 100% renewable-based generation is the loss of conventional bulk generation by synchronous machines, their inertia, and accompanying frequency and voltage control mechanisms. This gradual transformation of the power system to a low-inertia system leads to critical challenges in maintaining system stability. Novel control techniques for converters, so-called grid-forming strategies, are expected to address these challenges and replicate functionalities that so far have been provided by synchronous machines. We present a low-inertia high-fidelity case study that includes synchronous machines and models of grid-forming converters. We study interactions between synchronous machines and converters and analyze the response of various grid-forming control approaches to contingencies, i.e., large changes in load and the loss of a synchronous machine. Our case study highlights the positive impact of the grid-forming converters on frequency stability and analyze the potential limitations of each control technique when interacting with synchronous machines. Our studies also analyze how and when the interaction between the fast grid-forming converter, the dc source and ac current limitations, and the slow synchronous machine dynamics contributes to system instability. Lastly, we introduce an effective solution to address the instability issues due to the GFCs ac and dc current limitation.
Assessing Reproductive Performance to Establish Benchmarks for Small-Holder Beef Cattle Herds in South Africa

Simple Summary In South African beef cattle smallholder farms, there has been no recommended target benchmark that provide a baseline for improving the reported low herd reproductive performances. A multi-stage sampling approach was performed to examine reproductive performance as defined by pregnancy rate, fetal and calf losses, calving interval and days open to benchmark smallholder herd reproduction. It was found that smallholder farms recorded on average, 50% pregnancy rate and 12% fetal and calf losses, with days open and calving interval achieved at 334 and 608 days, respectively. Targeted benchmarks for performance derived from this study were 54%, 1.4%, 152 and 425 days, respectively for pregnancy rate, fetal and calf losses, days open and calving interval for smallholder farms in South Africa. The study showed that herd management practices including non-culling of old and non-productive cows, no knowledge of body condition score prior to breeding, no record keeping, continuous breeding season and low bull to cow ratio are associated with recorded reproductive performance norms in smallholder farms. The study found that smallholders have the potential to improve their performance levels if management knowledge is provided through advisory and extension services. Abstract Smallholder beef cattle farms in South Africa have had low reproductive performance, which has been associated with management practices. Considering current farm management practices, a multi-stage selection study was conducted to assess reproductive performance as defined by pregnancy rate, fetal and calf losses, calving interval and days open to benchmark reproductive performance. Data were collected twice, in autumn (March–May) for pregnancy diagnosis and in spring (September–November) for monitoring of confirmed pregnancies. Overall, 3694 cow records from 40 smallholder herds were collected during 2018 and 2019 breeding seasons from five provinces. The preferred 25th quartile described target performance and GLIMMIX procedure determined associations between management practices and performance. Smallholder farms on average recorded 50% pregnancy rate and 12% fetal and calf losses with 304 and 608 days open and calving interval, respectively. The derived target benchmarks for pregnancy rate, fetal and calf losses, days open and calving intervals in smallholder farms were 54%, 1.4%, 152 and 425 days, respectively. Reproductive performance was associated with no knowledge of body condition scoring before breeding, culling of old and non-productive cows, record keeping and low bull to cow ratio (p < 0.05). The performance benchmarks implied that industry averages may be improved if sustainable management services are provided through extension and advisory services.
Well-posedness and dispersive decay of small data solutions for the Benjamin-Ono equation

This article represents a first step toward understanding the long time dynamics of solutions for the Benjamin-Ono equation. While this problem is known to be both completely integrable and globally well-posed in $L^2$, much less seems to be known concerning its long time dynamics. Here, we prove that for small localized data the solutions have (nearly) dispersive dynamics almost globally in time. An additional objective is to revisit the $L^2$ theory for the Benjamin-Ono equation and provide a simpler, self-contained approach.
Similarities and differences between the traditional approach and the online approach to the teaching-learning-assessment process for Geography during the pandemic

During the COVID-19 pandemic, pre-university education was organized either on a new online model or on a traditional model, carried out on a series of educational learning platforms and using various open educational resources. Taking as a starting point the research published worldwide about the educational process during the pandemic period, we present and discuss the similarities and differences regarding the educational process of learning-assessment at the pre-university level, with reference to the subject of geography. To achieve our goal, we conducted a review of the literature on articles dealing with traditional pre-university education and the online model during the pandemic, taking into account our personal teaching-learning-assessment experience on this topic, as well as the perception of teachers. This study comparatively evaluates the students' learning about the results obtained in the two teaching-learning-assessment models and the perspective of the teachers through a survey of their reflection on the experiences of the pandemic period, identifying the causes, effects and solutions. The observations of the experiment and the analysis of the questionnaire showed significant similarities and differences between the scores obtained by the students and how the learning platforms can facilitate teaching and learning. This study discusses the implications and proposes suggestions for further research on these findings.
On a generalization of test ideals

Abstract The test ideal τ(R) of a ring R of prime characteristic is an important object in the theory of tight closure. In this paper, we study a generalization of the test ideal, which is the ideal τ(at) associated to a given ideal a with rational exponent t ≥ 0. We first prove a key lemma of this paper (Lemma 2.1), which gives a characterization of the ideal τ(at). As applications of this key lemma, we generalize the preceding results on the behavior of the test ideal τ(R). Moreover, we prove an analogue of so-called Skoda’s theorem, which is formulated algebraically via adjoint ideals by Lipman in his proof of the “modified Briançon-Skoda theorem. ”
Psychological and neurophysiological effects of inhaled aromatherapy

Primary Study Objective: the aim of this review was to filter current research written in English from 2010 to 2020 to elucidate the following question: what are the psychological and neurophysiological effects of inhaled aromatherapy on human health? Papers were selected based on PRISMA recommendations from Pubmed, Science Direct and Virtual Health Library databases. PICO technique and PROSPERO registration were also considered during the elaboration of this Systematic Review. Setting: schools, hospitals, clinics and dental offices. Participants: children, adults and elderly. Intervention: Essential oil inhalation. Primary Outcome Measures: Psychological approaches (eg. psychometric scales and cognitive tasks) and neurophysiological approaches (eg. heart rate variability/HRV and salivary cortisol). Results: From 1.458 papers, 14 were selected for final analysis and displayed in a table containing the following information: Score based on credibility criteria, authors, country, group, sex, age, objective, procedure and outcome. Conclusion: Aromatherapy mainly modulates the autonomic nervous system, with a predominance of parasympathetic activation and contributes to reduce cortisol and to increase melatonin levels. In addition, it can alleviate anxiety, depression and insomnia.