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The investigation of periodic motions of constrained multibody systems requires the numerical solution of differential-algebraic boundary value problems. After briefly surveying the basics of periodic motion analysis the paper presents an extension of projected collocation methods [6] to a special class of boundary Value problems for multibody system equations with position and velocity constraint
Popular Abstract in Swedish Kollektiva substantiv definieras som substantiv som trots att de är singulara till formen betecknar en grupp av individer och som kan uppträda tillsammans med singulara och plurala verb och pronomina ('it'/'they'). Avhandlingen beskriver variation i kongruens vid kollektiva substantiv i amerikansk, brittisk och australiensisk engelska. Denna variation ses i exemplen nedThis thesis concerns agreement with collective nouns in American, British and Australian English. It is based on material from newspaper corpora and spoken corpora. The findings suggest that dialectal, stylistic, diachronic, syntactic and semantic factors interact in the selection of singular and plural agreement. It was shown that there are differences between regional varieties, between speech a
In this article, we consider the propagation problem inside a waveguide filled with a homogeneous bi-isotropic material. The cross section of the waveguide is assumed arbitrary. By using the classical theory for the 2D Helmholtz equation in the cross section and the null-field approach, we obtain the dispersion equation in an implicit form. The final equation is a potential candidate for the solut
Release planning for incremental software development assigns features to releases such that most important technical, resource, risk and budget constraints are met. The research presented in this paper is an element of a three-staged procedure. In addition to an existing method for (i) strategic release planning that maps requirements to subsequent releases and (ii) a more fine-grained planning t
BACKGROUND: The importance of voltage-dependent conductances in sensory information processing is well-established in insect photoreceptors. Here we present the characterization of electrical properties in photoreceptors of the cockroach (Periplaneta americana), a nocturnal insect with a visual system adapted for dim light. RESULTS: Whole-cell patch-clamped photoreceptors had high capacitances and
Reducing the heterogeneity of technical lignin is essential to obtain predictable and high-performance polymeric materials that are suitable for high-value applications. Organic solvents with different polarities and solubilities can be used to fractionate lignin and reduce the complexity and diversity of its chemical structure. Among the various solvents and solvent mixtures, acetone-water mixtur
Develops the Black feminist concept of reproductive justice further in critical dialogue.Includes case studies and perspectives from Sweden, Nicaragua, Poland, Taiwan.Focuses on the historical and contemporary interplay between the state and the pro- abortion/anti-abortion movements.
Stupidity is generally thought of as a hindrance to learning: an epistemic vice that stands in the way of knowledge and understanding. In this article, I challenge this idea by exploring some of the meanings of stupidity that place it in a positive relation to learning. In this light, the article discusses two notions of stupidity: stupidity as unfinished thought and stupefaction through study. I
Poststructuralist perspectives need to be reconciled with political economic readings of urban globalization. One approach complements the other: the enactment of distantiated circuits and the territorialization of flows occur within existing geographies of uneven development while contingently reproducing or reshaping such spatial conditions of possibility. We argue that broadening the realm of c
This article studies the maximum likelihood estimates of magnitude and scale parameters for a Gaussian process of Ornstein-Uhlenbeck type used to model a deterministic function that does not have to be a realisation of an Ornstein- Uhlenbeck process. Specifically, we derive explicit expressions for the limiting values of the maximum likelihood estimates as the number of observations increases. The
The concept of food sovereignty is primarily taken as an alternative to the prevailing neoliberal food security model. However, the approach has hitherto not received adequate attention from policy makers. This could be because the discourse is marked by controversies and contradictions, particularly regarding its ability to address the challenges of feeding a rapidly growing global population. In
Active prechamber spark-ignition engines are a feasible and effective solution in reducing fuel consumption and pollutant emissions for internal combustion engines. However, reliable and low-cost numerical approaches need to be developed to support and speed-up their industrial design, considering their geometric complexity and the involved multiple-flow length scales. In this work, a computationa
We show that in contrast to the conventional view of a mean-field Landau-type behavior, the oxygen octahedral tilt (R) and polarization (P) in the A3B2O7 Ruddlesden-Popper hybrid improper ferroelectric (Ca,Sr)3Ti2O7 exhibits the scaling behavior of a 2D Ising class near the para-to-ferroelectric transition temperature (Tc). We also show that P exhibits an additional transition from a 2D Ising to a
Food loss and waste are major issues in the food industry, and they affect all stages of the food supply chain (FSC). Food loss and waste are linked to environmental deterioration, economic loss, and an increase in hunger. Therefore, the food industry requires sustainable consumption and production (SCP) to reduce losses and waste. The circular economy (CE) concept has become a popular strategy fo
Lung neuroendocrine neoplasms (NEN) are a heterogeneous population of neoplasms with different pathology, clinical behavior, and prognosis compared to the more common lung cancers. The diagnostic work-up and treatment of patients with lung- NEN has undergone major recent advances and new methods are currently being introduced into the clinic. These Nordic guidelines summarize and update the Nordic
Closed-loop motion planning is suitable for obstacle avoidance in dynamically changing environments due to its reactive nature, and various methods have been presented to provide (almost) global convergence. A common assumption in the control design is that the robot operates in a disjoint star world, i.e., all obstacles are strictly starshaped and mutually disjoint. However, in real-life scenario
