Sökresultat

Filtyp

Din sökning på "*" gav 528304 sökträffar

Integrators, Nonlinearities and Antireset Windup for Different Control Structures

In most control schemes it is advantageous to introduce integrators to eliminate off-set due to load disturbances. It is, however, also important to introduce nonlinearities, for instance due to limitations in actuators. The interaction between the integrator and the nonlinearities will cause problems with reset windup. Ways to handle anti-reset windup for different controller configurations are d

Some Topics in Real-time Control

This paper discusses some problems that can arise in distributed real-time control systems, for instance, sampling- interval jitter, timeout, and asynchronous loops.

Diagnostic and prognostic performance to detect Alzheimer's disease and clinical progression of a novel assay for plasma p-tau217

BACKGROUND: Recent advances in disease-modifying treatments highlight the need for accurately identifying individuals in early Alzheimer's disease (AD) stages and for monitoring of treatment effects. Plasma measurements of phosphorylated tau (p-tau) are a promising biomarker for AD, but different assays show varying diagnostic and prognostic accuracies. The objective of this study was to determine

Barcoding and species delimitation of Iranian freshwater crabs of the Potamidae family (Decapoda Brachyura)

Freshwater ecosystems are under multiple threats in modern times such as water extraction for human consumption, industries and agricultural activities, water contamination and habitat destruction for example. At the same time the biodiversity of these ecosystems are often poorly studied, especially in arid countries such as Iran. In this work, we study one of the ecologically important members of

På ostadig grund : Prediktiva modeller och svensk pandemihantering

COVID-19-pandemins första våg präglades av stor osäkerhet kring den nya sjukdomen och experter världen mobiliserade för att kartlägga den nya sjukdomen, hastigheten i dess spridning och dess dödlighet. På grund av dessa osäkerheter blev epidemiologiska modeller en viktig resurs i arbetet med att bemöta och hantera pandemin. Genom att modellera dess troliga förlopp och påverkan skapade epidemiologi

Pretending to be a believer : On understanding religious fictionalism as a role-playing game

According to religious fictionalism, a non-believer can participate in religious life by playing a game of make-believe. Considering how games of make-believe build on imagination and pretence, I argue that religious fictionalism requires the non-believing participant to engage in role-playing. Turning to the literature on role-playing games, I demonstrate how religious fictionalism conforms to a

The European Research Infrastructure Consortium (ERIC) as governed by EU law and Swedish law : A study on a European Union legal form within the Swedish legal system

The thesis studies a European Union legal form for organisation from the perspective of EU law and Swedish law on associations (associationsrätt). The legal form in focus is the European Research Infrastructure Consortium (ERIC), which was introduced by Council Regulation (EC) No 723/2009 of 25 June 2009 (the ERIC Regulation). The ERIC legal form allows states and intergovernmental organisations t

Evolution of MU69 from a binary planetesimal into contact by Kozai-Lidov oscillations and nebular drag

The New Horizons flyby of the cold classical Kuiper Belt object MU69 showed it to be a contact binary. The existence of other contact binaries in the 1–10 km range raises the question of how common these bodies are and how they evolved into contact. Here we consider that the pre-contact lobes of MU69 formed as a binary embedded in the Solar nebula, and calculate its subsequent orbital evolution in

The impact of crowd composition on egress performance

The data that is currently used when designing egress systems for stadia and other high-occupancy buildings was collected decades ago and might not be applicable in today's society. A systematic analysis of crowd movement was performed to investigate egress flows at a large stadium in the UK following four different event types (i.e., a football game, a rugby game, a concert featuring a male singe

Nurses’ refusals of patient involvement in their own palliative care

Background: Ideas of patient involvement are related to notions of self-determination and autonomy, which are not always in alignment with complex interactions and communication in clinical practice.Aim: To illuminate and discuss patient involvement in routine clinical care situations in nursing practice from an ethical perspective.Method: A case study based on an anthropological field study amongBackground:Ideas of patient involvement are related to notions of self-determination and autonomy, which are not always in alignment with complex interactions and communication in clinical practice.Aim:To illuminate and discuss patient involvement in routine clinical care situations in nursing practice from an ethical perspective.Method:A case study based on an anthropological field study among pa

Lysine-specific demethylase 1A (LSD1) restricts ex vivo propagation of human HSCs and is a target of UM171

Culture conditions in which hematopoietic stem cells (HSCs) can be expanded for clinical benefit are highly sought after. Here, we report that inhibition of the epigenetic regulator Lysine-specific histone demethylase 1A (LSD1) induces a rapid expansion of human cord blood derived CD34+ cells and promotes in vitro propagation of long-term repopulating HSCs by preventing differentiation. The phenot

Embedded sacrificial AlAs segments in GaAs nanowires for substrate reuse

We report on the use of a sacrificial AlAs segment to enable substrate reuse for nanowire synthesis. A silicon nitride template was deposited on a p-type GaAs substrate. Then a pattern was transferred to the substrate by nanoimprint lithography and reactive ion etching. Thermal evaporation was used to define Au seed particles. Metalorganic vapour phase epitaxy was used to grow AlAs-GaAs NWs in the

Associated factors of suicidal ideation among older persons with dementia living at home in eight European countries

Objectives: This study aimed to investigate the occurrence of suicidal ideation and associated factors in older persons with dementia living at home in eight European countries, and its association with quality of life. Furthermore, changes in suicidal ideation over time were investigated. Methods: This cohort study (n = 1,223) was part of the European “RightTimePlaceCare” project conducted in 201

Meaningful yet useless? Factors behind the retention of questionable concepts in human geography

The concepts ‘rural’ and ‘urban’ have long been criticized by geographers for their lack of analytical and explanatory power, yet have remained a vital source for conceptual guidance in human geography. Realizing that the continued use of questionable concepts inadvertently runs the risk of compromising communication, misdirecting resources and downgrading social theory, the current status of ‘rur

Poverty and social exclusion : An alternative spatial explanation

Poverty and social exclusion remain some of the biggest concerns in the face of obtaining social sustainability. In this respect, the continuing immense spatial differences between individual localities of seemingly similar characteristics have puzzled social scientists for decades. In quest for a better understanding, this article highlights the role of spatial heterogeneity as a factor conducive

Numerical simulation of buckling and post-buckling behavior of a central notched thin aluminum foil with nonlinearity in consideration

In thin notched sheets under tensile loading, wrinkling appears on the sheet surface, specifically around the cracked area. This is due to local buckling and compression stresses near the crack surfaces. This study aims to numerically study the buckling behavior of a thin sheet with a central crack under tension. A numerical model of a notched sheet under tensile loading is developed using the fin

5G Radio Access Network Slicing in Massive MIMO Systems for Industrial Applications

A key enabler for Industry 4.0 is Fifth Generation Wireless Specifications (5G), within which network slicing is a promising technique to ensure customized quality of service for specific end-user groups in industrial scenarios. Massive Multiple Input Multiple Output (MIMO) plays a significant role in 5G but network slicing for massive MIMO has not yet been addressed. In this paper, we propose a n

Transition from HCCI to PPC : Investigation of the Effect of Different Injection Timing on Ignition and Combustion Characteristics in an Optical PPC Engine

The partially premixed combustion (PPC) concept is regarded as an intermediate process between the thoroughly mixed Homogeneous charge compression ignition (HCCI) combustion and compression ignition (CI) combustion. It's a combination of auto-ignition mode, a fuel-rich premixed combustion mode, and a diffusion combustion mode. The concept has both high efficiency and low soot emission due to low h

A Health-Conscious Food Pattern Is Associated with Prediabetes and Gut Microbiota in the Malmö Offspring Study

Background: Diet is a determinant of gut microbiota. Both diet and gut microbiota have been linked to metabolic diseases. Objective: We aimed to examine data-driven food patterns in relation to the prevalence of prediabetes and gut microbiota composition and food pattern-associated bacteria in relation to prediabetes. Methods: Food patterns were extracted using principal component analysis in 1726

Model Predictive Control of an Advanced Multiple Cylinder Engine with Partially Premixed Combustion Concept

Partially premixed combustion (PPC) is an advanced combustion concept and powertrain technology, which has a great potential to improve the fuel economy of vehicles. The process of PPC is driven by both chemical kinetics and mixing process, and is, therefore, sensitive to inlet conditions and injection process. This article presents a control-oriented combustion and air-path model of a PPC multicy