861 research outputs found
Raising awareness for water polution based on game activities using internet of things
Awareness among young people regarding the environment and its resources and comprehension of the various factors that interplay, is key to changing human behaviour towards achieving a sustainable planet. In this paper IoT equipment, utilizing sensors for measuring various parameters of water quality, is used in an educational context targeting at a deeper understanding of the use of natural resources towards the adoption of environmentally friendly behaviours. We here note that the use of water sensors in STEM gameful learning is an area which has not received a lot of attention in the previous years. The IoT water sensing and related scenaria and practices, addressing children via discovery, gamification, and educational activities, are discussed in detail
Measure Theory and Lebesgue Integration
The Lebesgue integral is a generalization of the Riemann integral which extends the collection of functions which are integrable.
Lebesgue integration differs from Riemann integration in the way the approximations to the integral are taken. Riemann approximations use step functions which have a constant value on any given interval of the domain corresÂponding to some partition. Lebesgue approximations use what are called simple functions which, like the step functions, take on only a finite number of values. However, these values are not necessarily taken on by the function on intervals of the domain, but rather on arbitrary subsets of the domain. The integration of simple functions under the most general circumstances possible necessitates a generalization of our notion of length of a set when the set is more complicated than a simple interval. We define the Iebesgue measure m of a set E Đ M, where M is some collection of sets of real numbers, to be a certain set function which assigns to Ea nonnegative extended real number \u27mE \u27.
This report consists of the solutions of exercises found in \u27Real Analysis , by H. L. Hoyden. Quotations from the book are all accompanied by the title Definition or Theorem . The exercises are all entitled Proposition and all proofs in this report are my own. All theorems are quoted without proof The theorems and definitions occur as they are needed throughout the paper1 but some of the most basic definitions and theorems are lumped together in section II.
It is assumed in this paper that the reader is familiar with the basic concepts of advanced calculus and set theory
Crise suicidaire et maladie dâAlzheimer dĂ©butante : intĂ©rĂȘt dâune analyse neuropsychologique dĂ©taillĂ©e
RĂ©sumĂ©Introduction Le risque de dĂ©velopper une maladie dâAlzheimer augmente avec lâĂąge. Le rĂŽle de celle-ci comme un facteur de risque indĂ©pendant de suicide nâest pas bien compris et demeure complexe et mal Ă©lucidĂ©. Lâobjectif de cet article est dâenvisager une comprĂ©hension neuropsychologique de la crise suicidaire dans le cas dâune maladie dâAlzheimer dĂ©butante. MĂ©thode Une Ă©valuation cognitive globale (Mini-Mental State Examination, Batterie Rapide dâĂvaluation Frontale) complĂ©tĂ©e de lâexploration de lâinhibition cognitive selon ses fonctions dâaccĂšs (tĂąche de lecture en prĂ©sence de distracteurs), de suppression (Trail Making Test), et de freinage (Stroop, Hayling, Go/No-Go) a Ă©tĂ© rĂ©alisĂ©e chez une femme souffrant dâune maladie dâAlzheimer (MMSE Ă 21/30) avant et aprĂšs rĂ©alisation dâune tentative de suicide dans un contexte de dĂ©pression. RĂ©sultats LâĂ©chelle dâHamilton Ă©tait cotĂ©e Ă 24/52, lâĂ©chelle de dĂ©pression de Cornell Ă 21/38. LâintentionnalitĂ© suicidaire Ă©tait modĂ©rĂ©e avec un score Ă 15/25 à lâĂ©chelle dâintentionnalitĂ© suicidaire de Beck. Initialement prĂ©servĂ©es, le dĂ©clin des fonctions exĂ©cutives a coĂŻncidĂ© avec lâĂ©mergence dâune crise suicidaire dans un contexte de dĂ©pression chez une patiente souffrant de maladie dâAlzheimer. Les fonctions de lâinhibition cognitive Ă©taient altĂ©rĂ©es dans ses trois composantes, aprĂšs ajustement des facteurs de confusion. Conclusion Une Ă©valuation dĂ©taillĂ©e des fonctions exĂ©cutives et singuliĂšrement de lâinhibition cognitive dans la population des patients atteints dâune maladie dâAlzheimer permettrait de dĂ©tecter les personnes les plus Ă risque de passage Ă lâacte et de proposer une surveillance plus Ă©troite dans le cadre des soins gĂ©nĂ©raux de leur maladie. AbstractIntroduction The role of Alzheimer\u27s disease as a risk factor for suicide is unclear. The aim of this study was to understand neuropsychological component of the suicidal crisis in Alzheimer\u27s disease. Method Using an extensive neuropsychological battery, different aspects of cognitive inhibition were particularly examined: Access to relevant information (using the Reading with distraction task), suppression of no longer relevant information (Trail Making Test, Rule Shift Cards), and restraint of cognitive resources to relevant information (Stroop test, Hayling Sentence Completion test, Go/No-Go). One female Alzheimer depressed case was assessed before and after a suicide attempt. Results Ten days after the patient\u27s suicide attempt, dementia was still moderate with a MMSE score at 21/30 but with a worsening of executive functions (FAB at 8/18) in the context of depression and suicide. The Hamilton-Depression Rating Scale was at 24 (maximal score at 52), and the Cornell Scale for Depression was at 21 (maximal score at 38). Suicidal intent was moderate with a score of 9 on the Beck Suicide Intent Scale (maximal score at 25). The patient did not present a delirium, psychotic symptoms, or anosognosia. Her episodic memory was altered as shown by her semantic performance on verbal fluency (naming 12 animals in 120 seconds) and on lexical fluency (naming 8 words beginning with the letter P). Initially preserved, executive function declined during a suicidal crisis in a context of depression in Alzheimer\u27s disease case. Neuropsychological testing confirmed a dysexecutive syndrome (FAS at 8/18), with an impairment in her conceptualization capacity (MCST) and a deficit in cognitive inhibition and its access (reading task in the presence of distractors), deletion (TMT) and restraint (Stroop, Go/No-Go, Hayling) functions. Computed tomography has shown no signs of intracranial expansive process. Conclusion Assessing predictors of suicide and means of completion in patients with dementia may help the development of interventions to reduce risk of suicide among the growing population of individuals with dementia. Because of Alzheimer\u27s-related cognitive inhibition impairment, identification and intervention addressing the complex issues of depression, executive dysfunction and dementia may help clinicians to mitigate the risk of suicide in patients with Alzheimer\u27s disease
4D Emittance Measurements Using Multiple Wire and Waist Scan Methods in the ATF Extraction Line.
TUPC087International audienceEmittance measurements performed in the diagnostic section of the ATF extraction line since 1998 lead to ver- tical emittances three times larger than the expected ones, with a strong dependence on intensity. An experimental program is pursued to investigate potential sources of emit- tance growth and ïŹnd possible remedies. This requires ef- ïŹcient and reliable emittance measurement techniques. In the past, several phase-space reconstruction methods devel- oped at SLAC and KEK have been used to estimate the ver- tical emittance, based on multiple location beam size mea- surements and dedicated quadrupole scans. These methods have been shown to be very sensitive to measurement er- rors and other ïŹuctuations in the beam conditions. In this context new emittance measurements have been performed revisiting these methods and newly developed ones with a systematic approach to compare and characterise their per- formance in the ATF extraction line
Magnetic-field-induced superconductivity in layered organic molecular crystals with localized magnetic moments
The synthetic organic compound lambda-(BETS)2FeCl4 undergoes successive
transitions from an antiferromagnetic insulator to a metal and then to a
superconductor as a magnetic field is increased. We use a Hubbard-Kondo model
to clarify the role of the Fe(3+) magnetic ions in these phase transitions. In
the high-field regime, the magnetic field acting on the electron spins is
compensated by the exchange field He due to the magnetic ions. This suggests
that the field-induced superconducting state is the same as the zero-field
superconducting state which occurs under pressure or when the Fe(3+) ions are
replaced by non-magnetic Ga(3+) ions. We show how He can be extracted from the
observed splitting of the Shubnikov-de Haas frequencies. Furthermore, we use
this method of extracting He to predict the field range for field-induced
superconductivity in other materials.Comment: 5 page
Superconducting pairing and density-wave instabilities in quasi-one-dimensional conductors
Using a renormalization group approach, we determine the phase diagram of an
extended quasi-one-dimensional electron gas model that includes interchain
hopping, nesting deviations and both intrachain and interchain repulsive
interactions. d-wave superconductivity, which dominates over the
spin-density-wave (SDW) phase at large nesting deviations, becomes unstable to
the benefit of a triplet -wave phase for a weak repulsive interchain
backscattering term , despite the persistence of dominant SDW
correlations in the normal state. Antiferromagnetism becomes unstable against
the formation of a charge-density-wave state when exceeds some
critical value. While these features persist when both Umklapp processes and
interchain forward scattering () are taken into account, the effect
of alone is found to frustrate nearest-neighbor interchain - and
-wave pairing and instead favor next-nearest-neighbor interchain singlet or
triplet pairing. We argue that the close proximity of SDW and
charge-density-wave phases, singlet d-wave and triplet -wave superconducting
phases in the theoretical phase diagram provides a possible explanation for
recent puzzling experimental findings in the Bechgaard salts, including the
coexistence of SDW and charge-density-wave phases and the possibility of a
triplet pairing in the superconducting phase.Comment: 19 pages, 13 figure
Superconductivity in an organic insulator at very high magnetic fields
We investigate by electrical transport the field-induced superconducting
state (FISC) in the organic conductor -(BETS)FeCl. Below 4 K,
antiferromagnetic-insulator, metallic, and eventually superconducting (FISC)
ground states are observed with increasing in-plane magnetic field. The FISC
state survives between 18 and 41 T, and can be interpreted in terms of the
Jaccarino-Peter effect, where the external magnetic field {\em compensates} the
exchange field of aligned Fe ions. We further argue that the Fe
moments are essential to stabilize the resulting singlet, two-dimensional
superconducting stateComment: 9 pages 3 figure
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