Search results for "Lee"
showing 10 items of 1847 documents
Analysis of ecological shifts in the two‐age structured population model with Allee effect and environmental noise
2020
We study noise-induced transformations in the two-age structured population model with the Allee effect and environmental fluctuations. In this bistable model, ecological shifts are associated mathematically with random transitions between basins of coexisting attractors. The following phenomena are revealed and studied: (i) noise-induced extinction, (ii) stochastic regeneration, and (iii) excitement of random mixed-mode oscillations. Constructive abilities of the analytical method of confidence domains are demonstrated in the parametric study of these phenomena.
A Deep Learning Model for Automatic Sleep Scoring using Multimodality Time Series
2021
Sleep scoring is a fundamental but time-consuming process in any sleep laboratory. Automatic sleep scoring is crucial and urgent to help address the increasing unmet need for sleep research. Therefore, this paper aims to develop an end-to-end deep learning architecture using raw polysomnographic recordings to automate sleep scoring. The proposed model adopts two-dimensional convolutional neural networks (2D-CNN) to automatically learn features from multi-modality signals, together with a "squeeze and excitation" block for recalibrating channel-wise feature responses. The learnt representations are finally fed to a softmax classifier to generate predictions for each sleep stage. The model pe…
Skills Behind the Robotics : How to Re-educate Workers for the Future
2019
The aim of this study is to respond to the educational needs of the future, considering automation and robotics. It is inevitable that automation and robotics are changing our lives and they create challenges for the future work life and education. In this study, we investigate what is the educational background of the unemployed people who are in danger of being replaced by automation and what is their educational resilience for adapting work life changes. The data of this study consist of the latest PIAAC data (The Programme for the International Assessment of Adult Competencies). Based on the research we develop a model for re-educating the people who have lost their jobs. peerReviewed
Kontrolloitu sopeutuminen : ortodoksinen siirtoväki sotien jälkeisessä Ylä-Savossa (1946-1959)
2010
FATIGUE, SLEEP, AND NOCTURNAL COMPLAINTS IN PATIENTS WITH AMYOTROPHIC LATERAL SCLEROSIS.
2012
Background and purpose: Fatigue is a common symptom in amyotrophic lateral sclerosis (ALS). Although sleep disturbances are a candidate factor that may interfere with fatigue in patients with ALS, the role of sleep-related abnormalities in determining fatigue in ALS is unknown. Objective: To evaluate the frequency and determinants of fatigue in a group of 91 consecutive patients with ALS, with special attention to the relationship between fatigue and sleep problems. Methods: Measures included the Fatigue Severity Scale (FSS), Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS), ALS Functional Rating Scale- Revised (ALSFRS-R), and Beck Depression Inventory (BDI). Results: T…
Management of anemia: blood loss in orthopaedic surgery
2010
Major ortopaedic surgery and high energy trauma are often responsible of acute bleeding. Long bones and pelvis fractures are correlated with increased blood loss. The final consequence of a major bleeding is hypovolemic shock. The reduced oxygen tension of tissue could be responsible of heart attack, arrythmia, ictus, multi organ deficiency. For these reasons, it is important to immediately recognize and correct all potential bleeding in order to avoid complications. In orthopaedics the elective treatments in the managenment of hypovolemia are different. Blood banks and allogenic blood components have had an important impact on operative treatment and health care worldwide. erythropoietin h…
Technostress and social networking services: Explaining users' concentration, sleep, identity, and social relation problems
2018
It is common for users of social networking sites and services (SNS) to suffer from technostress and the various associated strains that hinder their well‐being. Despite prior SNS stress studies having provided valuable knowledge regarding SNS stressors and their use consequences, they have not examined the various strains related to well‐being that those stressors can create nor the underlying SNS characteristics. To address this gap in the research, we used a qualitative approach involving narrative interviews. As a contribution, our findings reveal four types of strains related to well‐being (concentration problems, sleep problems, identity problems, and social relation problems) as well…
Tietojoukkojen anonymisointi ja jälleentunnistaminen
2016
Nykyään ihmisistä kerätään ja tallentuu massiivisia määriä henkilökohtaista dataa, mutta kyseisen datan yksityisyydensuojasta ja turvallisuudesta ei aina voida olla täysin varmoja. Kun ihmisten henkilökohtaisia tietoja, kuten sairaushistoriaa tai hoitotietoja, julkaistaan esimerkiksi tutkimuskäyttöön, tulee tiedot anonymisoida riittävällä tavalla eli käsitellä siten, ettei yksittäisiä henkilöitä kyetä tunnistamaan tiedoista. Vaikka anonymisointitekniikoita on useita ja ne voivat olla tehokkaita, eivät ne ole täydellisiä: joskus anonymisointi voi pettää ja ihmisten mahdollisesti arkaluontoisiakin tietoja voi tulla julki ja päätyä vääriin käsiin. Anonymisoinnin pettäminen voi johtua joko ihmi…
Reactions of m-Terphenyl-Stabilized Germylene and Stannylene with Water and Methanol: Oxidative Addition versus Arene Elimination and Different React…
2015
Reactions of the divalent germylene Ge(ArMe6)2 (ArMe6 = C6H3-2,6-{C6H2-2,4,6-(CH3)3}2) with water or methanol gave the Ge(IV) insertion product (ArMe6)2Ge(H)OH (1) or (ArMe6)2Ge(H)OMe (2), respectively. In contrast, its stannylene congener Sn(ArMe6)2 reacted with water or methanol to produce the Sn(II) species {ArMe6Sn(μ-OH)}2 (3) or {ArMe6Sn(μ-OMe)}2 (4), respectively, with elimination of ArMe6H. Compounds 1–4 were characterized by IR and NMR spectroscopy as well as by X-ray crystallography. Density functional theory calculations yielded mechanistic insight into the formation of (ArMe6)2Ge(H)OH and {ArMe6Sn(μ-OH)}2. The insertion of an m-terphenyl-stabilized germylene into the O–H bond was…
Left Atrial Remodeling and Brain Natriuretic Peptide Levels Variation after Left Atrial Appendage Occlusion
2021
Background: Few data are available about brain natriuretic peptide (BNP) variation and left atrial remodeling after the left atrial appendage occlusion (LAAO) technique. Methods: Prospective study included all consecutive patients successfully implanted with an LAAO device. Contrast-enhanced cardiac computed tomography (CT) was performed before and 6 weeks after the procedure with reverse left atrial remodeling defined by an increase in LA volume >