Unraveling the "new morbidity": adolescent parenting and developmental delays.

Science.gov (United States)

Borkowski, J G; Whitman, T L; Passino, A W; Rellinger, E A; Sommer, K; Keogh, D

1992-01-01

Baumeister's concept of the "new morbidity" pertains to the linkages between poverty, adolescent mothers, and a series of developmental delays in their children. Outlined are three possible causes of the mild mental retardation and learning disabilities that are found disproportionately among the offspring of adolescents. First, there may be a direct genetic transmission of mild mental retardation. Second, adolescent mothers are likely to have a lack of support from a social network, be unprepared cognitively and emotionally to assume responsibility for child rearing, and to look to an infant to meet their own needs. Third, the interaction of genetic and environmental deficits leads to a parenting style that deprives the child of stimulation that could potentially overcome these deficits. A secure mother-infant attachment relationship provides the foundation for the development of social, emotional, attentional, and self-regulatory processes. When this attachment relationship is insecure, as a result of the mother's unreadiness to parent, the child cannot proceed to exploration of the environment--a critical component of cognitive development. If the infant has a difficult temperament, the risk of physical and emotional abuse increases, further compromising the child's future development. By 3 years of age, many of these children are showing declines in mental functioning, delays in receptive language skills, and poor motor and social skills. Research is urged to identify events in this chain that can be targeted for early intervention.

Parental Attributions of Control for Child Behaviour and Their Relation to Discipline Practices in Parents of Children with and Without Developmental Delays.

Science.gov (United States)

Jacobs, Myrthe; Marks Woolfson, Lisa; Hunter, Simon C

2017-01-01

Children with developmental delays (DD) are at risk for developing behavior problems. Research suggests that parents' causal attributions for child behavior are related to parenting. This study investigated this association in parents of children with DD compared to parents of typically developing (TD) children. It specifically focused on attributions of child control by separating these from attributions of responsibility, blame and intent, and from attributions of parent control and responsibility. Fifty-one parents of children with DD and 69 parents of TD children completed two questionnaires. The Written Analogue Questionnaire measured causal attributions. The Parenting Scale measured dysfunctional discipline practices. Parents of children with DD viewed the child's role in problematic behavior more positively while also viewing misbehavior as more fixed than parents of TD children. Parents of TD children who viewed their child as more in control over misbehavior used less dysfunctional discipline, but this association was not found for parents of children with DD. The results advance understanding of how parents perceive behavior problems in children with DD and the important role these perceptions play in parental behavior management strategies. More importantly, these perceptions relate to discipline practices differently for parents of children with DD compared to parents of TD children, highlighting that parent interventions should be adapted to the specific needs of parents of children with DD.

Mindfulness-based stress reduction for parents of young children with developmental delays: implications for parental mental health and child behavior problems.

Science.gov (United States)

Neece, Cameron L

2014-03-01

Parents of children with developmental delays (DD) typically report elevated levels of parental stress compared with parents of typically developing children. Children with DD are also at high risk for exhibiting significant behaviour problems. Parental stress has been shown to impact the development of these behaviour problems; however, it is rarely addressed in interventions aimed at reducing child behaviour problems. The current study examined the efficacy of mindfulness-based stress reduction (MBSR) for parents of children with DD by investigating whether this intervention is effective in reducing parenting stress and whether decreases in parenting stress lead to reductions in behaviour problems among children with DD. Forty six parents of children with DD were randomly assigned to an immediate treatment or wait list-control group. Participants completed questionnaires assessing parental stress and child behaviour problems at intake and at a second assessment, which took place after only the immediate treatment group had received the MBSR. Parents who participated in MBSR reported significantly less stress and depression as well as greater life satisfaction compared with wait list-control parents. Regarding child outcomes, children whose parents participated in MBSR were reported to have fewer behaviour problems following the intervention, specifically in the areas of attention problems and ADHD symptomatology. Results indicated that MBSR may be an effective intervention for ameliorating parental stress and mental health problems among parents of children with DD. Additionally, these benefits may 'spill over' and improve behaviour challenges among these children. © 2013 John Wiley & Sons Ltd.

Parent Concern and Enrollment in Intervention Services for Young Children with Developmental Delays: 2007 National Survey of Children's Health

Science.gov (United States)

Marshall, Jennifer; Kirby, Russell S.; Gorski, Peter A.

2016-01-01

This study sought to address underenrollment and late entry to early intervention by identifying factors associated with parental concern and services for developmental delays. The authors analyzed responses from 27,566 parents of children from birth to age 5 from the 2007 National Survey of Children's Health to quantify and to identify factors…

Time‐of‐flight secondary ion mass spectrometry imaging of biological samples with delayed extraction for high mass and high spatial resolutions

Science.gov (United States)

Vanbellingen, Quentin P.; Elie, Nicolas; Eller, Michael J.; Della‐Negra, Serge; Touboul, David

2015-01-01

Rationale In Time‐of‐Flight Secondary Ion Mass Spectrometry (TOF‐SIMS), pulsed and focused primary ion beams enable mass spectrometry imaging, a method which is particularly useful to map various small molecules such as lipids at the surface of biological samples. When using TOF‐SIMS instruments, the focusing modes of the primary ion beam delivered by liquid metal ion guns can provide either a mass resolution of several thousand or a sub‐µm lateral resolution, but the combination of both is generally not possible. Methods With a TOF‐SIMS setup, a delayed extraction applied to secondary ions has been studied extensively on rat cerebellum sections in order to compensate for the effect of long primary ion bunches. Results The use of a delayed extraction has been proven to be an efficient solution leading to unique features, i.e. a mass resolution up to 10000 at m/z 385.4 combined with a lateral resolution of about 400 nm. Simulations of ion trajectories confirm the experimental determination of optimal delayed extraction and allow understanding of the behavior of ions as a function of their mass‐to‐charge ratio. Conclusions Although the use of a delayed extraction has been well known for many years and is very popular in MALDI, it is much less used in TOF‐SIMS. Its full characterization now enables secondary ion images to be recorded in a single run with a submicron spatial resolution and with a mass resolution of several thousand. This improvement is very useful when analyzing lipids on tissue sections, or rare, precious, or very small size samples. © 2015 The Authors. Rapid Communications in Mass Spectrometry published by John Wiley & Sons Ltd. PMID:26395603

Relationship between Social Media Dependency, Perceived Parenting Style, Delay of Gratification, and Narcissism

OpenAIRE

Derebaşı, Muhammet Burak

2015-01-01

Worldwide, there is an increasing interest to study social media dependency. Currently, most of the researches compare social media dependency with other dependencies such as substance abuse and gambling. Although, there is limited research to investigate the effect of personality on social media dependency. Therefore, the main aim of the current study was to examine the predictor roles of narcissism, perceived parenting styles and delay of gratification on social media dependency. A total of...

Delayed fission

Energy Technology Data Exchange (ETDEWEB)

Hatsukawa, Yuichi [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

1997-07-01

Delayed fission is a nuclear decay process that couples {beta} decay and fission. In the delayed fission process, a parent nucleus undergoes {beta} decay and thereby populates excited states in the daughter. If these states are of energies comparable to or greater than the fission barrier of the daughter, then fission may compete with other decay modes of the excited states in the daughter. In this paper, mechanism and some experiments of the delayed fission will be discussed. (author)

Comparing Service Delivery Models for Children with Developmental Delays in Canada: Adaptive and Maladaptive Behaviours, Parental Perceptions of Stress and of Care

Science.gov (United States)

Sladeczek, Ingrid E.; Fontil, Laura; Miodrag, Nancy; Karagiannakis, Anastasia; Amar, Daniel; Amos, Janet

2017-01-01

This study compares two service delivery models (community-based and centre-based), examining them in light of children's adaptive and maladaptive behaviours, and parental perceptions of stress and of care. More specifically, parents of 96 children with developmental delays assessed their children's adaptive and maladaptive behaviours and rated…

Cell cycle delays induced by heavy ion irradiation of synchronous mammalian cells

International Nuclear Information System (INIS)

Scholz, M.; Kraft-Weyrather, W.; Ritter, S.; Kraft, G.

1994-01-01

Cell cycle delays in V79 Chinese hamster cells induced by heavy ion exposure have been investigated using flow cytometry. Synchronous cell populations in G 1 -, S- and late-S/G 2 M-phase were used. Cells were irradiated with particles from Z = 10 (neon) up to Z = 96 (uranium) in the energy range from 2.4 to 17.4 MeV/u and the LET range from 415 to 16225 keV/μm at the UNILAC at GSI, Darmstadt. For comparison, experiments with 250 kV X-rays were performed. For light particles like neon, cell cycle perturbations comparable to those after X-ray irradiation were found, and with increasing LET an increasing delay per particle traversal was observed. For the highest LET-values, extended delays in G 1 -, S- and G 2 M-phase were detected immediately after irradiation. A large fraction of the cells remained in S-phase or G 2 M-phase up to 48 h or longer after irradiation. No significant cell age dependence of cycle delays was detected for the very high LET values. In addition to cell cycle delays, two effects related to the DNA-content as determined by flow cytometry were found after irradiation with very high LET particles, which were attributed to cell fusion and to drastic morphological changes of the cells. Estimations based on the dose deposited by a single particle hit in the cell nucleus and the actual number of hits show, that the basic trend of the experimental results can be explained by the stochastic properties of particle radiation. (orig.)

Structural and composition investigations at delayered locations of low k integrated circuit device by gas-assisted focused ion beam

Energy Technology Data Exchange (ETDEWEB)

Wang, Dandan, E-mail: dandan.wang@globalfoundries.com; Kee Tan, Pik; Yamin Huang, Maggie; Lam, Jeffrey; Mai, Zhihong [Technology Development Department, GLOBALFOUNDRIES Singapore Pte. Ltd., 60 Woodlands Industrial Park D, Street 2, Singapore 738406 (Singapore)

2014-05-15

The authors report a new delayering technique – gas-assisted focused ion beam (FIB) method and its effects on the top layer materials of integrated circuit (IC) device. It demonstrates a highly efficient failure analysis with investigations on the precise location. After removing the dielectric layers under the bombardment of an ion beam, the chemical composition of the top layer was altered with the reduced oxygen content. Further energy-dispersive x-ray spectroscopy and Fourier transform infrared analysis revealed that the oxygen reduction lead to appreciable silicon suboxide formation. Our findings with structural and composition alteration of dielectric layer after FIB delayering open up a new insight avenue for the failure analysis in IC devices.

Improved Delayed-Neutron Spectroscopy Using Trapped Ions

Energy Technology Data Exchange (ETDEWEB)

Norman, Eric

2018-04-24

The neutrons emitted following the  decay of fission fragments (known as delayed neutrons because they are emitted after fission on a timescale of the -decay half-lives) play a crucial role in reactor performance and control. Reviews of delayed-neutron properties highlight the need for high-quality data for a wide variety of delayed-neutron emitters to better understand the timedependence and energy spectrum of the neutrons as these properties are essential for a detailed understanding of reactor kinetics needed for reactor safety and to understand the behavior of these reactors under various accident and component-failure scenarios. For fast breeder reactors, criticality calculations require accurate delayed-neutron energy spectra and approximations that are acceptable for light-water reactors such as assuming the delayed-neutron and fission-neutron energy spectra are identical are not acceptable and improved -delayed neutron data is needed for safety and accident analyses for these reactors. With improved nuclear data, the delayedneutrons flux and energy spectrum could be calculated from the contributions from individual isotopes and therefore could be accurately modeled for any fuel-cycle concept, actinide mix, or irradiation history. High-quality -delayed neutron measurements are also critical to constrain modern nuclear-structure calculations and empirical models that predict the decay properties for nuclei for which no data exists and improve the accuracy and flexibility of the existing empirical descriptions of delayed neutrons from fission such as the six-group representation

A quasi-experimental evaluation of parents as sexual health educators resulting in delayed sexual initiation and increased access to condoms.

Science.gov (United States)

Campero, Lourdes; Walker, Dilys; Atienzo, Erika E; Gutierrez, Juan Pablo

2011-04-01

To evaluate the effectiveness of an educational intervention for parents of first year high school students in the State of Morelos, Mexico, whose aim was to impact adolescents' sexual behavior, knowledge and access to contraception. Quasi-experimental prospective study with eleven control and eleven intervention schools using self-administered questionnaires for parents and adolescents pre- and post-intervention. Parent-child dyads in the control and intervention schools were matched according to parents' propensity score; the average treatment effect (ATE) was estimated for adolescent's outcome variables. At follow-up, we found significant differences for adolescents in the intervention schools: 6.8% delayed initiation of sexual intercourse, 14.4% had correct knowledge about emergency contraception (EC), and 164% reported having received condoms from their parents, when comparing with students in control schools. Our results suggest that parent-focused interventions could be an innovative and effective strategy to promote adolescents sexual health. Copyright © 2010 The Association for Professionals in Services for Adolescents. Published by Elsevier Ltd. All rights reserved.

Angular dependence of the attosecond time delay in the H 2 + ion

Science.gov (United States)

Kheifets, Anatoli; Serov, Vladislav

2016-05-01

Angular dependence of attosecond time delay relative to polarization of light can now be measured using combination of RABBITT and COLTRIMS techniques. This dependence brings particularly useful information in molecules where it is sensitive to the orientation of the molecular axis. Here we extend the theoretical studies of and consider a molecular ion H2+in combination of an attosecond pulse train and a dressing IR field which is a characteristic set up of a RABBIT measurement. We solve the time-dependent Schrödinger equation using a fast spherical Bessel transformation (SBT) for the radial variable, a discrete variable representation for the angular variables and a split-step technique for the time evolution. The use of SBT ensures correct phase of the wave function for a long time evolution which is especially important in time delay calculations. To speed up computations, we implement an expanding coordinate (EC) system which allows us to reach space sizes and time periods unavailable by other techniques. Australian Research Council DP120101805.

Behaviour of direct and delayed fast ion losses during NBI on TJ-II

International Nuclear Information System (INIS)

Guasp, J.; Liniers; M.

1995-09-01

The dependence with density and beam energy of the different kind of fast ion losses, direct and delayed, during tangential balanced NBI injection in TJ-II helical axis stellerator has been analysed. Direct losses increase with energy and a strong difference between the two injection directions appears, are produced by passing particles that loss confinement in a dew mu,sec and the influence of birth profiles produces an increase with density. Delayed losses are very well separated in time from direct ones, are produced by particles experimenting pitch angle scattering an,d, most o them, correspond to trapped particles. Are much less important than the direct ones (about 1/3), decrease slowly with energy and, with CX, increase with density (an effect of initial profile). The absorption is rather independent of energy with low values at low density in reason of high shine trough and CX losses, but reovers quickly with the density increase

Behaviour of direct and delayed fast ion losses during NBI on TJ-II

International Nuclear Information System (INIS)

Guasp, J.; Liniers, M.

1995-01-01

The dependence with density and beam energy of the different kind of fast ion losses, direct and delayed, during tangential balanced NBI injection in TJ-II helical axis stellarator has been analysed. Direct losses increase with energy and a strong difference between the two injection directions appears, are produced by passing particles that loss confinement in a few μsec and the influence of birth profiles produces an increase with density. Delayed losses are very well separated in time from direct ones, are produced by particles experimenting pitch angle scattering and, most o them, correspond to trapped particles. Are much less important than the direct ones (about 1/3), decrease slowly with energy and, with C X, increase with density (an effect of initial profile). The absorption is rather independent of energy with low values at low density in reason of high shine through and C X losses, but recovers quickly with the density increase. (Author) 4 refs

The effects of early positive parenting and developmental delay status on child emotion dysregulation.

Science.gov (United States)

Norona, A N; Baker, B L

2017-02-01

Emotion regulation has been identified as a robust predictor of adaptive functioning across a variety of domains (Aldao et al. ). Furthermore, research examining early predictors of competence and deficits in ER suggests that factors internal to the individual (e.g. neuroregulatory reactivity, behavioural traits and cognitive ability) and external to the individual (e.g. caregiving styles and explicit ER training) contribute to the development of ER (Calkins ). Many studies have focused on internal sources or external sources; however, few have studied them simultaneously within one model, especially in studies examining children with developmental delays (DD). Here, we addressed this specific research gap and examined the contributions of one internal factor and one external factor on emotion dysregulation outcomes in middle childhood. Specifically, our current study used structural equation modelling (SEM) to examine prospective, predictive relationships between DD status, positive parenting at age 4 years and child emotion dysregulation at age 7 years. Participants were 151 families in the Collaborative Family Study, a longitudinal study of young children with and without DD. A positive parenting factor was composed of sensitivity and scaffolding scores from mother-child interactions at home and in the research centre at child age 4 years. A child dysregulation factor was composed of a dysregulation code from mother-child interactions and a parent-report measure of ER and lability/negativity at age 7 years. Finally, we tested the hypothesis that positive parenting would mediate the relationship between DD and child dysregulation. Mothers of children with DD exhibited fewer sensitive and scaffolding behaviours compared with mothers of typically developing children, and children with DD were more dysregulated on all measures of ER. SEM revealed that both DD status and early positive parenting predicted emotion dysregulation in middle childhood. Furthermore

Stability and delayed fragmentation of highly charged C60 trapped in a conic-electrode electrostatic ion resonator (ConeTrap)

International Nuclear Information System (INIS)

Bernard, J.; Wei, B.; Bourgey, A.; Bredy, R.; Chen, L.; Kerleroux, M.; Martin, S.; Montagne, G.; Salmoun, A.; Terpend-Ordaciere, B.

2007-01-01

We employed a conic-electrode electrostatic ion resonator (ConeTrap) to store the recoil ions (C 60 r+ ) resulting from collision between 56keV Ar 8+ ions and C 60 in order to study their stability over a long time range (several milliseconds). The originality of our method, based on the trapping of a single ion to preserve the detection in coincidence of all the products of the collision, is presented in detail. Our results show that C 60 ions produced in such collisions are stable in the considered observation time. By employing the ConeTrap as a secondary mass spectrometer in order to let the ions oscillate only for a single period, we have been able to observe delayed evaporation of cold C 60 3+ ions 20μs after the collision. We interpret quantitatively the relative yields of daughter ions with a cascade model in which the transition rates are estimated via the commonly used Arrhenius law, taking into account the contribution of the radiative decay

Termination of short term melatonin treatment in children with delayed Dim Light Melatonin Onset: effects on sleep, health, behavior problems, and parenting stress

NARCIS (Netherlands)

van Maanen, Annette; Meijer, Anne Marie; Smits, Marcel G.; Oort, Frans J.

2011-01-01

To investigate the effects of termination of short term melatonin treatment on sleep, health, behavior, and parenting stress in children with delayed Dim Light Melatonin Onset. Forty-one children (24 boys, 17 girls; mean age=9.43 years) entered melatonin treatment for 3 weeks and then discontinued

Links between parent characteristics and attachment variables for college students of parental divorce.

Science.gov (United States)

Carranza, Laura V; Kilmann, Peter R; Vendemia, Jennifer M C

2009-01-01

This study investigated links between offsprings' attachment patterns and parent characteristics in 157 females and 62 males of parental divorce. Secure females and males reported affection, respect, and closeness toward both biological parents. Offsprings' insecure attachment pattern was associated with negative parent characteristics. Participants who perceived their same-sex parent negatively were more likely to report an insecure attachment. Our findings suggest delayed negative consequences of parental divorce for college women and men.

Delay and refusal of human papillomavirus vaccine for girls, national immunization survey-teen, 2010.

Science.gov (United States)

Dorell, Christina; Yankey, David; Jeyarajah, Jenny; Stokley, Shannon; Fisher, Allison; Markowitz, Lauri; Smith, Philip J

2014-03-01

Human papillomavirus (HPV) vaccine coverage among girls is low. We used data reported by parents of 4103 girls, 13 to 17 years old, to assess associations with, and reasons for, delaying or refusing HPV vaccination. Sixty-nine percent of parents neither delayed nor refused vaccination, 11% delayed only, 17% refused only, and 3% both delayed and refused. Eighty-three percent of girls who delayed only, 19% who refused only, and 46% who both delayed and refused went on to initiate the vaccine series or intended to initiate it within the next 12 months. A significantly higher proportion of parents of girls who were non-Hispanic white, lived in households with higher incomes, and had mothers with higher education levels, delayed and/or refused vaccination. The most common reasons for nonvaccination were concerns about lasting health problems from the vaccine, wondering about the vaccine's effectiveness, and believing the vaccine is not needed.

Secondary emission from a CuBe target due to bombardment with parent and fragment ions of ammonia and phosphine

International Nuclear Information System (INIS)

Maerk, T.D.

1977-01-01

The secondary electron emission of the first dynode of a CuBe alloy sixteen dynode electron multiplier has been studied in the course of electron impact ionization studies of ammonia and phosphine. Relative secondary electron emission coefficients have been obtained for the singly and doubly charged parent and fragment ions of ammonia, ammonia-d 3 , phosphine and phosphine-d 3 for kinetic energies of 5,25 and 10,5 keV. It has been found, that in general deuterated ions have smaller γ coefficients, that ammonia ions have larger γ coefficients than corresponding phosphine ions, and that the γ coefficients increase with the complexity of the ion under study. (Auth.)

Estimating power capability of aged lithium-ion batteries in presence of communication delays

Science.gov (United States)

Fridholm, Björn; Wik, Torsten; Kuusisto, Hannes; Klintberg, Anton

2018-04-01

Efficient control of electrified powertrains requires accurate estimation of the power capability of the battery for the next few seconds into the future. When implemented in a vehicle, the power estimation is part of a control loop that may contain several networked controllers which introduces time delays that may jeopardize stability. In this article, we present and evaluate an adaptive power estimation method that robustly can handle uncertain health status and time delays. A theoretical analysis shows that stability of the closed loop system can be lost if the resistance of the model is under-estimated. Stability can, however, be restored by filtering the estimated power at the expense of slightly reduced bandwidth of the signal. The adaptive algorithm is experimentally validated in lab tests using an aged lithium-ion cell subject to a high power load profile in temperatures from -20 to +25 °C. The upper voltage limit was set to 4.15 V and the lower voltage limit to 2.6 V, where significant non-linearities are occurring and the validity of the model is limited. After an initial transient when the model parameters are adapted, the prediction accuracy is within ± 2 % of the actually available power.

Factors Associated with Delayed Cancer Diagnosis in Egyptian Children

Directory of Open Access Journals (Sweden)

E.R. Abdelkhalek

2014-01-01

Full Text Available Background Despite tremendous importance of early cancer diagnosis in children, few studies on this topic have been conducted in Egypt. Early stage diagnosis can have a positive effect on prognoses and the quality of life of children with cancer. We investigated delays in the diagnosis of childhood cancers in Egypt and determined the factors associated with these delays. Methods This retrospective study included 172 children with cancer from two pediatric oncology units. The interval between symptoms onset and final diagnosis for each child was estimated and examined by univariate and multivariate analyses to determine correlations with the child's sex, age at diagnosis, type and site of malignancy, family residence, socioeconomic status, and parental educational level. Findings The median total diagnosis delay period was 47 days caused by patients and/or parents (8 days and diagnosis (28 days. Statistically significant patient factors associated with delayed diagnosis were age (<5 years, lower parental education, and socioeconomic status. Sex residence and family size were not significant. Malignancy type and tumor site significantly affected the time for diagnosis. The lowest median value was associated with germ cell tumors (GCTs and leukemia, and the highest value was in children with brain tumor. Missed diagnoses were initially recorded in 39.5% of the patients and were associated with patient and tumor factors. Interpretation Delayed diagnosis of childhood cancer is related to age, family, socioeconomic status and parental education, and cancer type and site. Efforts should be made to promote awareness, develop effective steps to eliminate possible contributing factors, and determine the best intervention method.

The nature of adolescent competencies predicted by preschool delay of gratification.

Science.gov (United States)

Mischel, W; Shoda, Y; Peake, P K

1988-04-01

Delay of gratification, assessed in a series of experiments when the subjects were in preschool, was related to parental personality ratings obtained a decade later for 95 of these children in adolescence. Clear and consistent patterns of correlations between self-imposed delay time in preschool and later ratings were found for both sexes over this time span. Delay behavior predicted a set of cognitive and social competencies and stress tolerance consistent with experimental analyses of the process underlying effective delay in the preschool delay situation. Specifically, children who were able to wait longer at age 4 or 5 became adolescents whose parents rated them as more academically and socially competent, verbally fluent, rational, attentive, planful, and able to deal well with frustration and stress. Comparisons with related longitudinal research using other delay situations help to clarify the important features of the situations and person variables involved in different aspects of delay of gratification.

Diagnostic delays in children with early-onset epilepsy: impact, reasons, and opportunities to improve care

Science.gov (United States)

Berg, Anne T.; Loddenkemper, Tobias; Baca, Christine B.

2014-01-01

Purpose Delayed diagnosis of early-onset epilepsy is a potentially important and avoidable complication in epilepsy care. We examined the frequency of diagnostic delays in young children with newly presenting epilepsy, their developmental impact, and reasons for delays. Methods Children who developed epilepsy before their third birthday were identified in a prospective community-based cohort. An interval ≥1 month from second seizure to diagnosis was considered a delay. Testing of development at baseline and for up to three years after and of IQ 8–9 years later was performed. Detailed parental baseline interview accounts and medical records were reviewed to identify potential reasons for delays. Factors associated with delays included the parent, child, pediatrician, neurologist, and scheduling. Results Diagnostic delays occurred in 70/172 (41%) children. Delays occurred less often if children had received medical attention for the first seizure (p<0.0001), previously had neonatal or febrile seizures (p=0.02), had only convulsions before diagnosis (p=0.005) or had a college-educated parent (p=0.01). A ≥1 month diagnostic delay was associated with an average 7.4 point drop (p=0.02) in the Vineland Scales of Adaptive Behavior motor score. The effect was present at diagnosis, persisted for at least three years, and was also apparent in IQ scores 8–9 years later which were lower in association with a diagnostic delay by 8.4 points (p=0.06) for processing speed up to 14.5 points (p=0.004) for full scale IQ, after adjustment for parental education and other epilepsy-related clinical factors. Factors associated with delayed diagnosis included parents not recognizing events as seizures (N=47), pediatricians missing or deferring diagnosis (N=15), neurologists deferring diagnosis (N=7), and scheduling problems (N=11). Significance Diagnostic delays occur in many young children with epilepsy. They are associated with substantial decrements in development and IQ later

Delayed child-bearing.

Science.gov (United States)

Johnson, Jo-Ann; Tough, Suzanne

2012-01-01

To provide an overview of delayed child-bearing and to describe the implications for women and health care providers. Delayed child-bearing, which has increased greatly in recent decades, is associated with an increased risk of infertility, pregnancy complications, and adverse pregnancy outcome. This guideline provides information that will optimize the counselling and care of Canadian women with respect to their reproductive choices. Maternal age is the most important determinant of fertility, and obstetric and perinatal risks increase with maternal age. Many women are unaware of the success rates or limitations of assisted reproductive technology and of the increased medical risks of delayed child-bearing, including multiple births, preterm delivery, stillbirth, and Caesarean section. This guideline provides a framework to address these issues. Studies published between 2000 and August 2010 were retrieved through searches of PubMed and the Cochrane Library using appropriate key words (delayed child-bearing, deferred pregnancy, maternal age, assisted reproductive technology, infertility, and multiple births) and MeSH terms (maternal age, reproductive behaviour, fertility). The Internet was also searched using similar key words, and national and international medical specialty societies were searched for clinical practice guidelines and position statements. Data were extracted based on the aims, sample, authors, year, and results. The quality of evidence was rated using the criteria described in the Report of the Canadian Task Force on Preventive Health Care (Table 1). The Society of Obstetricians and Gynaecologists of Canada. RECOMMENDATIONS 1. Women who delay child-bearing are at increased risk of infertility. Prospective parents, especially women, should know that their fecundity and fertility begin to decline significantly after 32 years of age. Prospective parents should know that assisted reproductive technologies cannot guarantee a live birth or completely

Influences on Immunization Decision-Making among US Parents of Young Children.

Science.gov (United States)

Chung, Yunmi; Schamel, Jay; Fisher, Allison; Frew, Paula M

2017-12-01

Objectives This study assessed influences on vaccination decisions among parents of young children and examined common vaccination information and advice sources. Methods Using panel samples of parents of children under 7 years, web-based surveys were conducted in 2012 (n = 2603) and 2014 (n = 2518). A vaccine decision-making typology (non-hesitant acceptors, hesitant acceptors, delayers, and refusers) was established and weighted population estimates of potential factors influencing parental vaccination decision (e.g., provider influence, source of information and advice) were computed by year and decision type. Results Delayers and refusers were more likely than acceptors to know someone whose child experienced a severe reaction to a vaccine or delayed/refused vaccine(s). High proportions of delayers (2012: 33.4%, 2014: 33.9%) and refusers (2012: 49.6%, 2014: 58.6%) reported selecting their healthcare provider based on whether the provider would allow them to delay/refuse vaccines. Providers were the most frequently reported trusted vaccine information source among all parents, though more often by acceptors than refusers (2012, 2014: p influences likely contribute to immunization decisions of parents. Vaccine hesitant parents often seek providers amenable to accommodating their vaccine beliefs. Providers may benefit from vaccine communication training as their recommendations may influence hesitant parents to immunize their children.

Experimental methods in radioactive ion-beam target/ion source development and characterization

International Nuclear Information System (INIS)

Welton, R.F.; Alton, G.D.; Cui, B.; Murray, S.N.

1998-01-01

We have developed off-line experimental techniques and apparatuses that permit direct measurement of effusive-flow delay times and ionization efficiencies for nearly any chemically reactive element in high-temperature target/ion sources (TIS) commonly used for on-line radioactive ion-beam (RIB) generation. The apparatuses include a hot Ta valve for effusive-flow delay-time measurements, a cooled molecular injection system for determination of ionization efficiencies, and a gas flow measurement/control system for introducing very low, well-defined molecular flows into the TIS. Measurements are performed on a test stand using molecular feed compounds containing stable complements of the radioactive nuclei of interest delivered to the TIS at flow rates commensurate with on-line RIB generation. In this article, the general techniques are described and effusive-flow delay times and ionization efficiency measurements are reported for fluorine in an electron-beam plasma target/ion source developed for RIB generation and operated in both positive- and negative-ion extraction modes. copyright 1998 American Institute of Physics

Low-Income Parents' Warmth and Parent-Child Activities for Children with Disabilities, Suspected Delays and Biological Risks

Science.gov (United States)

Eshbaugh, Elaine M.; Peterson, Carla A.; Wall, Shavaun; Carta, Judith J.; Luze, Gayle; Swanson, Mark; Jeon, Hyun-Joo

2011-01-01

Warm and responsive parenting is optimal for child development, but this style of parenting may be difficult for some parents to achieve. This study examines how parents' observed warmth and their reported frequency of parent-child activities were related to children's classifications as having biological risks or a range of disability indicators.…

Positive parenting mitigates the effects of poor self-regulation on body mass index trajectories from ages 4-15 years.

Science.gov (United States)

Connell, Lauren E; Francis, Lori A

2014-08-01

This study sought to determine whether parenting style moderates the effects of delay of gratification on body mass index (BMI) trajectories from ages 4-15 years. Longitudinal data were analyzed for 778 children drawn from the Study of Early Child Care and Youth Development. Parenting style (i.e., authoritative, authoritarian, permissive, and neglectful) was created from measures of mothers' sensitivity and expectations for self-control when children were age 4 years. Self-regulation was also measured at 4 years using a well-known delay of gratification protocol. BMI was calculated from measured height and weight at each time point. Mixed modeling was used to test the interaction of parenting styles and ability to delay gratification on BMI trajectories from 4-15 years. There was a significant interaction effect of parenting and ability to delay on BMI growth from 4-15 years for boys. Boys who had authoritarian mothers and failed to delay gratification had a significantly steeper rate of growth in BMI from childhood through adolescence than children in any other parenting by delay group. Authoritative and permissive parenting styles were protective against more rapid BMI gains for boys who could not delay gratification. Ability to delay gratification was protective against BMI gains for boys who had parents with authoritarian or neglectful parenting styles.

Positive parenting mitigates the effects of poor self-regulation on BMI trajectories from age 4 to 15 years

Science.gov (United States)

Connell, Lauren E.; Francis, Lori A.

2014-01-01

Objective This study sought to determine whether parenting style moderated the effects of delay of gratification on BMI trajectories from age 4 to 15 years. Methods Longitudinal data were analyzed on 778 children drawn from the Study of Early Child Care and Youth Development. Parenting style (authoritative, authoritarian, permissive, neglectful) was created from measures of mothers’ sensitivity and expectations for self-control when children were age 4 years. Self-regulation was also measured at 4 years using a well-known delay of gratification protocol. BMI was calculated from measured height and weight at each time point. Mixed modeling was used to test the interaction of parenting styles and ability to delay gratification on BMI trajectories from 4 to 15 years. Results There was a significant interaction effect of parenting and ability to delay on BMI growth from 4 to 15 years for boys. Boys who had authoritarian mothers and failed to delay gratification had a significantly steeper rate of growth in BMI from childhood through adolescence than children in any other parenting x delay group. Conclusions Authoritative and permissive parenting styles were protective against more rapid BMI gains for boys who could not delay gratification. Ability to delay gratification was protective against BMI gains for boys who had parents with authoritarian or neglectful parenting styles. PMID:23977874

Invisible Victims: Delayed Onset Depression among Adults with Same-Sex Parents

Directory of Open Access Journals (Sweden)

D. Paul Sullins

2016-01-01

Full Text Available The relationship of elevated depression risk recently discovered among adult persons raised by same-sex parents with possible precipitating conditions in childhood has not previously been acknowledged. This study tests whether such inattention is supportable. Logistic regression based risk ratios were estimated from longitudinal measures of mental health outcomes observed in three waves (at ages 15, 22, and 28 of the US National Survey of Adolescent to Adult Health (n=15,701. At age 28, the adults raised by same-sex parents were at over twice the risk of depression (CES-D: risk ratio 2.6, 95% CI 1.4–4.6 as persons raised by man-woman parents. These findings should be interpreted with caution. Elevated risk was associated with imbalanced parental closeness and parental child abuse in family of origin; depression, suicidality, and anxiety at age 15; and stigma and obesity. More research and policy attention to potentially problematic conditions for children with same-sex parents appears warranted.

[Language and behavioral difficulties at age 3 and half and reading delay in grade 2].

Science.gov (United States)

Watier, L; Dellatolas, G; Chevrie-Muller, C

2006-09-01

Early detection of specific language impairment and dyslexia in children is an important public health problem. Longitudinal studies are needed for the distinction of real impairments from simple transitory delays. Teachers filled a 29-item questionnaire on language and behavior for 695 children aged 3.5 years. Four years later (at second grade of primary school) the same children were evaluated for reading and writing. Statistical analysis focused on the relationships between teacher's early observations and reading delay 4 years later. Associated factors were age, sex, educational level and bilinguism of the parents, and area of the school. The delay in written language acquisition (8.5% of the children) was significantly associated with low educational level (but not bilinguism) of the parents and to the area of the school. In univariate analysis, most of the teacher's early negative assessments were significantly related to reading/writing delay, with the exception of some behavioral problems. However, when the effect of associated factors was taken into account only a few items, mainly concerning language expression, remained significantly associated with later reading/writing delay. These data show a major role of associated factors (educational level of the parents, area of the school) in reading delay, and help to select specific teacher's observations for an early prediction of this delay.

Analysis of results from delay studies of isol-systems

International Nuclear Information System (INIS)

Rudstam, G.

1980-01-01

The delay between production and measurement is an important effect in ISOL-experiments aiming at the determination of nuclear reaction yields. The present report discusses methods to correct for decay losses caused by the delay in the target - ion source system of the isotope separator. (author)

Cervical cancer vaccination for my daughter, no thanks: A research synthesis on parental explained barriers to delayed or non-acceptance of HPV vaccination in high-income (OECD) nations. Parental expressed reasons on why they delay or rejected HPV vaccination for their daughters aged 9-17 within OECD nations between 2008 and 2016

OpenAIRE

Ayino, Kenneth A.

2016-01-01

Background: The World Health Organization including high income nations recommends that Human Papillomavirus (HPV) vaccination should be given to young girls as they believe it’s the best available method to reduce cervical cancer morbidity and mortality. HPV vaccination remains lower than anticipated within OECD nations. Through responses, we may understand the main reasons to why parents delayed or declined to accept their daughters to be vaccinated. Objective: To determine and identify...

Measuring functional developmental delay in infants and young children: prevalence rates from the NHIS-D.

Science.gov (United States)

Simpson, Gloria A; Colpe, Lisa; Greenspan, Stanley

2003-01-01

In order to measure the prevalence of developmental delay among US infants and children, two types of questions were asked of parents in the 1994-95 National Health Interview Survey on Disability (NHIS-D). To measure functional delay (FD), questions from the Functional Developmental Growth Chart (FDQ), which measures specific age-appropriate tasks, were used. General delay (GD) was defined using the general type of questions about developmental delay that had been used in previous surveys. Using a nationally representative sample of 15 291 infants and children aged 4-59 months from the NHIS-D, analyses revealed that, according to these questions, approximately 3.3% had FD and 3.4% of the children had GD. However, only one-third of the children were identified by both sets of questions. Thus, two-thirds of the children identified as having FD were not recognised by their parents as having a delay. Conversely, many parents responded to the GD questions indicating that their child had a delay, but failed to indicate that their child had a functional problem. In addition, only 17% of the children with FD and 31% of those with GD were receiving special services. Multivariable logistic regression analyses found that children with both FD and GD were more likely to be male and to be living in families with incomes below 200% of the poverty level. The findings suggest that the general types of developmental delay questions used in national surveys may not identify children with functional delays. As parents failed to identify these children, it is possible that many of these children may be slipping through paediatric surveillance. Further research to evaluate the use of these measures in population surveys is recommended.

Behavior Problems in Toddlers with and without Developmental Delays: Comparison of Treatment Outcomes

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Holtz, Casey A.; Carrasco, Jennifer M.; Mattek, Ryan J.; Fox, Robert A.

2009-01-01

The purpose of this study is to examine the effectiveness of an in-home parent management program for toddlers with behavior problems and developmental delays by comparing outcomes for a group of toddlers with developmental delays (n = 27) and a group of toddlers without developmental delays (n = 27). The majority of children lived in single…

The influence of maternal child-rearing attitudes and teaching behaviors on preschoolers' delay of gratification.

Science.gov (United States)

Mauro, C F; Harris, Y R

2000-09-01

This study was an exploratory examination of the influence of mothers' teaching behaviors, strategies, and child-rearing attitudes on their children's ability to delay gratification. In an externally imposed delay of gratification situation, 30 mothers from a rural university community taught their children strategies that could help them refrain from touching a brightly wrapped present when the mothers left the room. Results showed that mothers of children who did not delay gratification exhibited teaching behaviors and child-rearing attitudes consistent with a permissive parenting style, whereas mothers of children who did delay gratification exhibited teaching behaviors and child-rearing attitudes consistent with an authoritative parenting style. The results of this study are discussed with respect to the development of children's self-control and self-regulatory abilities.

Semelparous Penna Ageing Model with Parental Care

Science.gov (United States)

Fehsenfeld, K. M.; Sá Martins, J. S.; de Oliveira, S. Moss; Bernardes, A. T.

In this paper we study the importance of parental care for the survival of semelparous species, that reproduce only once in life. We perform our simulations for sexual and asexual reproductions and show that catastrophic senescence (death soon after reproduction) is delayed if parental care is considered.

Magnetic Resonance Imaging (MRI) Evaluation of Developmental Delay in Pediatric Patients

OpenAIRE

Ali, Althaf S.; Syed, Naziya P.; Murthy, G.S.N.; Nori, Madhavi; Abkari, Anand; Pooja, B.K.; Venkateswarlu, J.

2015-01-01

Introduction: Developmental delay is defined as significant delay in one or more developmental domains. Magnetic Resonance Imaging (MRI) is the best modality to investigate such patients. Evaluation of a child with developmental delay is important not only because it allows early diagnosis and treatment but also helpful for parental counseling regarding the outcome of their child and to identify any possible risk of recurrence in the siblings. Thus this study was undertaken to evaluate the de...

Bundle Security Protocol for ION

Science.gov (United States)

Burleigh, Scott C.; Birrane, Edward J.; Krupiarz, Christopher

2011-01-01

This software implements bundle authentication, conforming to the Delay-Tolerant Networking (DTN) Internet Draft on Bundle Security Protocol (BSP), for the Interplanetary Overlay Network (ION) implementation of DTN. This is the only implementation of BSP that is integrated with ION.

Is parenting associated with teenagers' early sexual risk-taking, autonomy and relationship with sexual partners?

Science.gov (United States)

Parkes, Alison; Henderson, Marion; Wight, Daniel; Nixon, Catherine

2011-03-01

Extensive research has explored the relationship between parenting and teenagers' sexual risk-taking. Whether parenting is associated with wider aspects of teenagers' capacity to form satisfying sexual relationships is unknown. Self-reported data were collected in 2007 from 1,854 students, whose average age was 15.5 years, in central Scotland. Multivariate analyses examined associations between parenting processes and sexual outcomes (delayed first intercourse, condom use and several measures reflecting the context or anticipated context of first sex). Parental supportiveness was positively associated with all outcomes (betas, 0.1-0.4), and parental values restricting intercourse were positively associated with all outcomes except condom use (0.1-0.5). Parental monitoring was associated only with delayed intercourse (0.2) and condom use (0.2); parental rules about TV content were associated with delayed intercourse (0.7) and expecting sex in a relationship, rather than casually (0.8). Frequency of parental communication about sex and parental values endorsing contraceptive use were negatively associated with teenagers' delayed intercourse (-0.5 and -0.3, respectively), and parents' contraceptive values were negatively associated with teenagers' expecting sex in a relationship (-0.5). Associations were partly mediated by teenagers' attitudes, including value placed on having sex in a relationship. Parents may develop teenagers' capacity for positive and safe early sex by promoting skills and values that build autonomy and encourage sex only within a relationship. Interventions should promote supportive parenting and transmission of values, avoid mixed messages about abstinence and contraception, and acknowledge that teenagers may learn more indirectly than directly from parents about sex. Copyright © 2011 by the Guttmacher Institute.

Delayed Parental Divorce: How Much Do Children Benefit?

Science.gov (United States)

Furstenberg, Frank F.; Kiernan, Kathleen E.

2001-01-01

Compares children who experience divorce in childhood with those who were young adults when their parents divorced using data on British children (N=11,409) who participated in the National Child Development Study. Children's long-term welfare appears to be linked both to conditions preceding and following the divorce event. Results suggest…

Parent presence, delayed dispersal, and territory acquisition in the Seychelles warbler

NARCIS (Netherlands)

Eikenaar, C.; Richardson, D. S.; Komdeur, J.

2007-01-01

The presence of parents in the natal territory may play an important, but often overlooked, role in natal dispersal and the consequent acquisition of a territory. Living with parents in a territory may confer a fitness advantage to subordinates through, for example, the nepotistic behavior of the

Fragmentation of anthracene induced by collisions with 40 keV Ar8+ ions

International Nuclear Information System (INIS)

Brédy, R; Ortéga, C; Ji, M; Bernard, J; Chen, L; Montagne, G; Martin, S

2013-01-01

We report on the fragmentation of anthracene molecular ions C 14 H 10 r+ as a function of the parent ion initial charge r (= 1–4). Neutral anthracene molecules in the gas phase were ionized and excited in collisions with Ar 8+ ions at 40 keV and the mass-to-charge spectra of the parent ions C 14 H 10 r+ (1 ⩽ r ⩽ 4) were obtained. Stable molecular ions C 14 H 10 r+ (1 ⩽ r ⩽ 3) are observed. Branching ratios for the competitive evaporation (loss of neutral fragments) and fragmentation (charge separation) processes were measured for C 14 H 10 2+ parent ions. For C 14 H 10 3+ parent ions, the results indicate that fragmentation is the only dominant process and quasi-symmetric fission is observed. (paper)

A Mobile Early Stimulation Program to Support Children with Developmental Delays in Brazil.

Science.gov (United States)

Dias, Raquel da Luz; Silva, Kátia Cristina Correa Guimarães; Lima, Marcela Raquel de Oliveira; Alves, João Guilherme Bezerra; Abidi, Syed Sibte Raza

2018-01-01

Developmental delay is a deviation development from the normative milestones during the childhood and it may be caused by neurological disorders. Early stimulation is a standardized and simple technique to treat developmental delays in children (aged 0-3 years), allowing them to reach the best development possible and to mitigate neuropsychomotor sequelae. However, the outcomes of the treatment depending on the involvement of the family, to continue the activities at home on a daily basis. To empower and educate parents of children with neurodevelopmental delays to administer standardized early stimulation programs at home, we developed a mobile early stimulation program that provides timely and evidence-based clinical decision support to health professionals and a personalized guidance to parents about how to administer early stimulation to their child at home.

The Relation of Maternal Child-Rearing Attitudes to Delay of Gratification among Boys.

Science.gov (United States)

Reitman, David; Gross, Alan M.

1997-01-01

Examined whether ongoing sources of environmental influence such as parenting might be related to a preference for delayed reward. Found that mothers who rated themselves as more restrictive and nurturant (authoritative style) tended to have children who delayed longer than others who characterized themselves as similarly restrictive but…

Longitudinal Models of Socio-Economic Status: Impact on Positive Parenting Behaviors

Science.gov (United States)

Azad, Gazi; Blacher, Jan; Marcoulides, George

2014-01-01

Parenting research is frequently conducted without a thorough examination of socio-economic characteristics. In this study, longitudinal observations of positive parenting were conducted across six time points. Participants were 219 mothers of children with and without developmental delays. Mothers' positive parenting increased during early and…

Determinants of developmental delay in infants aged 12 months.

Science.gov (United States)

Slykerman, Rebecca F; Thompson, John M D; Clark, Phillipa M; Becroft, David M O; Robinson, Elizabeth; Pryor, Jan E; Wild, Chris J; Mitchell, Edwin A

2007-03-01

The aim of this study was to determine which demographic, maternal, obstetric and postnatal variables were associated with achievement of developmental milestones at the age of 12 months in term infants. Mothers and babies were enrolled in the Auckland Birthweight Collaborative Study shortly after birth. All infants were full term (gestation >or= 37 weeks). Approximately half of the sample were small for gestational age (SGA = birthweight 10th percentile). A maternal interview was conducted soon after birth. Phase 2 of the study occurred 12 months later when mothers were sent a postal questionnaire requesting information about the child's health and development during the first year of life using the Denver Prescreening Developmental Questionnaire. Seven hundred and forty-four (85.4%) European mothers returned the postal questionnaire. SGA children were not at increased risk of developmental delay at 12 months of age. In a sample representative of New Zealand European children, after adjustment for the effects of potential confounders, maternal smoking during pregnancy (OR = 2.1 [95% CI 1.1, 4.0]), maternal smoking during the first year of life (OR = 1.9 [95% CI 1.0, 3.8]) and low levels of satisfaction with parenting (OR = 2.4 [95% CI 1.1, 5.2]) were associated with significantly increased risk of developmental delay. In the subgroup of SGA children, maternal smoking during pregnancy (OR = 2.9 [95% CI 1.4, 6.2]), high levels of stress associated with parenting (OR = 2.2 [95% CI 1.2, 4.0]), and low levels of satisfaction with parenting (OR = 4.3 [95% CI 1.3, 13.5]) were significantly associated with developmental delay after adjustment for the effects of potential confounders. In conclusion, maternal and postnatal factors were better predictors of developmental delay than demographic variables.

WHO Parents Skills Training (PST) programme for children with developmental disorders and delays delivered by Family Volunteers in rural Pakistan: study protocol for effectiveness implementation hybrid cluster randomized controlled trial.

Science.gov (United States)

Hamdani, S U; Akhtar, P; Zill-E-Huma; Nazir, H; Minhas, F A; Sikander, S; Wang, D; Servilli, C; Rahman, A

2017-01-01

Development disorders and delays are recognised as a public health priority and included in the WHO mental health gap action programme (mhGAP). Parents Skills Training (PST) is recommended as a key intervention for such conditions under the WHO mhGAP intervention guide. However, sustainable and scalable delivery of such evidence based interventions remains a challenge. This study aims to evaluate the effectiveness and scaled-up implementation of locally adapted WHO PST programme delivered by family volunteers in rural Pakistan. The study is a two arm single-blind effectiveness implementation-hybrid cluster randomised controlled trial. WHO PST programme will be delivered by 'family volunteers' to the caregivers of children with developmental disorders and delays in community-based settings. The intervention consists of the WHO PST along with the WHO mhGAP intervention for developmental disorders adapted for delivery using the android application on a tablet device. A total of 540 parent-child dyads will be recruited from 30 clusters. The primary outcome is child's functioning, measured by WHO Disability Assessment Schedule - child version (WHODAS-Child) at 6 months post intervention. Secondary outcomes include children's social communication and joint engagement with their caregiver, social emotional well-being, parental health related quality of life, family empowerment and stigmatizing experiences. Mixed method will be used to collect data on implementation outcomes. Trial has been retrospectively registered at ClinicalTrials.gov (NCT02792894). This study addresses implementation challenges in the real world by incorporating evidence-based intervention strategies with social, technological and business innovations. If proven effective, the study will contribute to scaled-up implementation of evidence-based packages for public mental health in low resource settings. Registered with ClinicalTrials.gov as Family Networks (FaNs) for Children with Developmental

Radiochemical Means of Investigating Delayed Neutron Precursors

International Nuclear Information System (INIS)

Marmol, P. del

1968-01-01

Fast radiochemical methods used now for the determination of delayed neutron precursors are classified and reviewed: precipitations, solvent extractions, range experiments, milking, gas sweeping, isotopic and ion exchange, hot atom reactions and diffusion loss. Advantages and limitations of irradiation systems with respect to fast separations are discussed: external beams which allow faster separations only have low neutron fluxes, internal beams which are mostly fit for gaseous reactions; and rabbits for solution irradiations. Future prospects of radiochemical procedures are presented; among these, studies should be mostly oriented towards gaseous reactions which offer possibilities of isolating very short-lived delayed neutron precursors. Chemical procedures for delayed neutron precursor detection are compared with mass spectrometric and isotope separator techniques; it is concluded that the methods are complementary. (author)

Radiochemical Means of Investigating Delayed Neutron Precursors

International Nuclear Information System (INIS)

Marmol, P. del

1968-01-01

Fast radiochemical methods used now for the determination of delayed neutron precursors are classified and reviewed: precipitations, solvent extractions, range experiments, milking, gas sweeping, isotopic and ion exchange, hot-atom reactions and diffusion loss. Advantages and limitations of irradiation systems with respect to fast separations are discussed: external beams which allow faster separations only have low neutron fluxes, internal beams which are mostly fit for gaseous reactions; and rabbits for solution irradiations. Future prospects of radiochemical procedures are presented; among these, studies should be mostly oriented towards gaseous reactions which offer possibilities of isolating very short-lived delayed neutron precursors. Chemical procedures for delayed neutron precursor detection are compared with mass spectrometric and isotope-separator techniques; it is concluded that the methods are complementary. (author)

Television viewing associates with delayed language development.

Science.gov (United States)

Chonchaiya, Weerasak; Pruksananonda, Chandhita

2008-07-01

To identify impact of television viewing on language development. The case-control study included 56 new patients with language delay and 110 normal children, aged 15-48 months. Language delay was diagnosed by reviewing language milestones and Denver-II. Television viewing variables and child/parental characteristics between both groups were interviewed. The data were analyzed by ANOVA and chi-square test. Adjusted odds ratios and 95% confidence intervals were calculated from multivariate logistic regression model. Forty-six boys and 10 girls; mean [+/-SD] age, 2.11+/-0.47 years of the case group and 59 boys and 51 girls; mean [+/-SD] age, 2.23+/-0.80 years of the control group were enrolled. Children who had language delay usually started watching television earlier at age 7.22+/-5.52 months vs. 11.92+/-5.86 months, p-valuetelevision than normal children (3.05+/-1.90 h/day vs. 1.85+/-1.18 h/day; p-valuetelevision attelevision>2 h/day were approximately six times more likely to have language delays. There is a relationship between early onset and high frequency of TV viewing and language delay.

Reduced Delay of Gratification and Effortful Control among Young Children with Autism Spectrum Disorders

Science.gov (United States)

Faja, Susan; Dawson, Geraldine

2015-01-01

We explored internal control of behavior using direct observation and parent report. Previous research has found that both the delay of gratification task and parent-reported effortful control predict later social ability and more positive outcomes in typically developing children. Children with autism spectrum disorder have previously been…

Parental monitoring may protect impulsive children from overeating.

Science.gov (United States)

Bennett, C; Blissett, J

2017-10-01

Research has highlighted links between impulsivity and weight in children and adults. Nevertheless, little is known about the nature of this link in very young children or about the underlying mechanism by which impulsivity leads to greater adiposity. The present study aimed to explore relationships between impulsivity, weight and eating behaviour in a sample of 95 2 to 4-year-olds. Parent-child dyads visited the laboratory and consumed a meal after which parents completed measures of child impulsivity, eating behaviour and parental feeding, whilst children completed impulsivity tasks measuring the impulsivity facet delay of gratification (Snack Delay task), motor impulsivity (Line Walking task) and inhibitory control (Tower task). Pearson's correlations showed that girls with greater motor impulsivity were heavier. Additionally, monitoring moderated the relationship between impulsivity and food approach behaviour, indicating that monitoring may protect more impulsive children from displaying problematic eating behaviours. The motor impulsivity facet appears particularly relevant to child weight; parents can modulate the impact of impulsivity on child eating behaviour through their feeding style. © 2016 World Obesity Federation.

Significant Sleep Dysregulation in a Toddler With Developmental Delay.

Science.gov (United States)

Stein, Martin T; Owens, Judith; Abbott, Myles

Derrick's parents made an appointment with a new pediatrician for a second opinion about disordered sleep. Now 22-months old, he was evaluated at 18 months of age for developmental delay when he was found to have "a regulatory disorder associated with delays in language and motor development, hypotonia and significant sleep problems." The parents are now most concerned about his sleeping pattern. Prolonged sleep onset and frequent night awaking occur each night since 6-months of age. These problems are more severe in the past few months when he awakes screaming and cannot be settled. The awakening episodes occur 2 to 4 times each night when "he screams and thrashes his body for up to an hour." Daytime tantrums increased. After the parents read a book about sleep in young children, they provided a calm atmosphere at bedtime including a dark room and singing a quiet lullaby. When these changes did not alter sleep, they purchased a vibrating mattress which was also unsuccessful.Derrick was born full term after an uncomplicated prenatal and perinatal course. He sat at 10 months, crawled at 12 months, and walked at 18 months. He currently drinks from a sippy cup and he can use a utensil to eat. He has few words saying only "no" and "mama" in the past month. Imitation of some words occurred recently. He has responded to simple directions in the past 2 months. Derrick passed the newborn audiology screen. He does not have difficulty swallowing and he does not drool. He plays with many different toys and he plays in parallel with his older brother who also experienced delays in motor and language development. His brother is now doing very well in school. There is no family history of cognitive delay, seizure disorder, cerebral palsy, early developmental delay (other than the brother) or a significant sleep problem. PHYSICAL EXAMINATION:: head circumference, length and weight (75th percentile). He had mild generalized hypotonia, mild weakness, 2+ symmetrical deep tendon

Toddler Developmental Delays After Extensive Hospitalization: Primary Care Practitioner Guidelines.

Science.gov (United States)

Lehner, Dana C; Sadler, Lois S

2015-01-01

This review investigated developmental delays toddlers may encounter after a lengthy pediatric hospitalization (30 days or greater). Physical, motor, cognitive, and psychosocial development of children aged 1 to 3 years was reviewed to raise awareness of factors associated with developmental delay after extensive hospitalization. Findings from the literature suggest that neonatal and pediatric intensive care unit (NICU/PICU) graduates are most at risk for developmental delays, but even non-critical hospital stays interrupt development to some extent. Primary care practitioners (PCPs) may be able to minimize risk for delays through the use of formal developmental screening tests and parent report surveys. References and resources are described for developmental assessment to help clinicians recognize delays and to educate families about optimal toddler development interventions. Pediatric PCPs play a leading role in coordinating health and developmental services for the young child following an extensive hospital stay.

Like Parent Like Child? The Role of Delayed Childrearing in Breaking the Link Between Parent’s Offending and Their Children’s Antisocial Behavior**

Science.gov (United States)

Lizotte, Alan J.; Krohn, Marvin D.; Thornberry, Terence P.; Bushway, Shawn D.; Schmidt, Nicole M.

2013-01-01

This paper investigates the impact of parents’ history of violent offending, their age at first birth, and the interaction of the two on their adolescent children’s violent behavior. We employ intergenerational longitudinal data from the Rochester Youth Development Study to estimate parental trajectories of offending from their early adolescence through early adulthood. We show that the particular shape of the parents’ propensity of offending over time can interact with their age at first birth to protect their children from delinquency. We investigate these relationships for children at 6 and 10 years of age. We find that for some groups delaying childrearing can insulate children from their parents’ offending. PMID:26392677

Molecular Basis of Cardiac Delayed Rectifier Potassium Channel Function and Pharmacology.

Science.gov (United States)

Wu, Wei; Sanguinetti, Michael C

2016-06-01

Human cardiomyocytes express 3 distinct types of delayed rectifier potassium channels. Human ether-a-go-go-related gene (hERG) channels conduct the rapidly activating current IKr; KCNQ1/KCNE1 channels conduct the slowly activating current IKs; and Kv1.5 channels conduct an ultrarapid activating current IKur. Here the authors provide a general overview of the mechanistic and structural basis of ion selectivity, gating, and pharmacology of the 3 types of cardiac delayed rectifier potassium ion channels. Most blockers bind to S6 residues that line the central cavity of the channel, whereas activators interact with the channel at 4 symmetric binding sites outside the cavity. Copyright © 2016 Elsevier Inc. All rights reserved.

Service Delivery to Children With Mild Hearing Loss: Current Practice Patterns and Parent Perceptions.

Science.gov (United States)

Walker, Elizabeth A; Spratford, Meredith; Ambrose, Sophie E; Holte, Lenore; Oleson, Jacob

2017-03-01

This study investigates clinical practice patterns and parent perception of intervention for children with mild hearing loss (HL). Ages at and delays between service delivery steps (first diagnostic evaluation, confirmation of HL, hearing aid [HA] fitting, entry into early intervention) were investigated for 113 children with mild HL. Comparisons were made to children with moderate-to-severe HL. Parents of children with mild HL reported reasons for delays and their perceptions of intervention and amplification for their children. Seventy-four percent of children with mild HL were identified through the newborn hearing screen; 26% were identified later due to passing or not receiving a newborn hearing screen. Ninety-four percent of children with mild HL were fit with HAs, albeit at significantly later ages than children with moderate-to-severe HL. Most parents indicated that their children benefited from HA use, but some parents expressed ambivalence toward the amount of benefit. Audiologists appear to be moving toward regularly providing amplification for children with mild HL. However, delays in HA fittings indicate that further educating professionals and parents about the benefits of early amplification and intervention is warranted to encourage timely fitting and consistent use of HAs.

Magnetic resonance imaging (MRI) evaluation of developmental delay in pediatric patients.

Science.gov (United States)

Ali, Althaf S; Syed, Naziya P; Murthy, G S N; Nori, Madhavi; Abkari, Anand; Pooja, B K; Venkateswarlu, J

2015-01-01

Developmental delay is defined as significant delay in one or more developmental domains. Magnetic Resonance Imaging (MRI) is the best modality to investigate such patients. Evaluation of a child with developmental delay is important not only because it allows early diagnosis and treatment but also helpful for parental counseling regarding the outcome of their child and to identify any possible risk of recurrence in the siblings. Thus this study was undertaken to evaluate the developmental delay in Indian children which will help the clinicians in providing an estimation of the child's ultimate developmental potential and organize specific treatment requirement and also relieve parental apprehension. To study the prevalence of normal and abnormal MRI in pediatric patients presenting with developmental delay and further categorize the abnormal MRI based on its morphological features. It is a prospective, observational & descriptive study of MRI Brain in 81 paediatric patients (46 Males and 35 Females), aged between three months to 12 years; presenting with developmental delay in Deccan College of Medical Sciences, Hyderabad; over a period of three years (Sept 2011 to Sept 2014). MRI brain was done on 1.5T Siemens Magnetom Essenza & 0.35T Magnetom C with appropriate sequences and planes after making the child sleep/sedated/ anesthetized. Various anatomical structures like Ventricles, Corpus callosum, etc were systematically assessed. The MRI findings were divided into various aetiological subgroups. Normal MRI findings were seen in 32% cases and 68% had abnormal findings of which the proportion of Traumatic/ Neurovascular Diseases, Congenital & Developmental, Metabolic and Degenerative, neoplastic and non specific were 31%, 17%, 10%, 2.5% and 7.5% respectively. The ventricles and white matter mainly the corpus callosum were the most commonly affected anatomical structures. The diagnostic yield was found to be 68% and higher yield was seen in patients presenting with

Influence of parenting styles on development of children aged three to six years old.

Science.gov (United States)

Nanthamongkolchai, Sutham; Ngaosusit, Chutima; Munsawaengsub, Chokchai

2007-05-01

To investigate the influences of parenting styles on development of children aged three to six years. A cross-sectional study was conducted in 360 children and their parents selected by multi-stage random sampling. The data were collected from July 24th to August 31st, 2004. The Denver II test kit and the scale by Baumrind D were used to test the child development and parenting styles respectively. A questionnaire was used to collect the family and child factors. Data were analyzed by frequency distribution and Multiple logistic regression with the significant level set at p-value of Parenting styles had significant influences on child development (p-value parenting style had a 1.9 times higher chance of having delayed development compared with those with democratic parenting style. In addition, significant family and child factors for explaining child development were family type, mother's education, father's occupation, relationship within the family, nutritional status and sex. Parenting styles had a significant influence on child development. The children raised with mixed parenting style had a 1.9 timds higher chance of having delayed development compared to those whose parents used democratic parenting style. Therefore, the parents should rear their children by using the democratic parenting style that leads to the age-appropriate development child

Associations between parents' satisfaction with provider communication and HPV vaccination behaviors.

Science.gov (United States)

Kornides, Melanie L; Fontenot, Holly B; McRee, Annie-Laurie; Panozzo, Catherine A; Gilkey, Melissa B

2018-05-03

Despite increasing awareness of the importance of a provider recommendation for HPV vaccine, the U.S. has yet to achieve the Healthy people 2020 goal of 80% series completion among adolescents. This failure indicates a need for further examination of the modifiable influences on parents' decision-making. Healthcare providers can influence parents' HPV vaccination decision-making, but little is known about parents' perspectives on the counseling they receive. We sought to assess U.S. parents' satisfaction with provider communication about HPV vaccine and associations with vaccination behaviors. Parents of 11-to-17-year-old adolescents who discussed HPV vaccination with a healthcare provider at least once (n = 795) completed our online survey in Fall 2016. We assessed their satisfaction with the discussion using the HPV Vaccine Communication Satisfaction Scale (α = 0.94). We examined associations between satisfaction (categorized as low, moderate, or high), and three vaccination behaviors: refusal/delay, series initiation (≥1 dose), and continuation (≥2 doses among initiators) using multivariable logistic regression. Most parents reported high (36%) or moderate (38%) satisfaction with provider communication about HPV vaccination; fewer reported low (26%) satisfaction. Moderately satisfied parents (vs. low) had lower odds of refusal/delay (aOR = 0.59, 95% CI: 0.38-0.89), and higher odds of initiation (aOR = 1.71, 95% CI:1.15-2.55) and continuation (aOR = 2.05, 95% CI: 1.24-3.40). The associations were stronger for highly satisfied parents (refusal/delay aOR = 0.45, 95% CI: 0.29-0.70, initiation aOR = 3.59, 95% CI: 2.23-5.78, and continuation aOR = 4.08, 95% CI: 2.38-7.01). Our study suggests that parent satisfaction with provider communication may play an important role in HPV vaccination decision-making. Yet, communication satisfaction has been largely unexamined in the HPV-vaccine literature to date. We introduce a brief, 7-item

Unsupportive parenting and internalising behaviour problems in children with or without intellectual disability.

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Rodas, N V; Zeedyk, S M; Baker, B L

2016-12-01

Children with intellectual disability (ID) are at heightened risk for developing other psychological disorders, including internalising disorders. Anxiety and depression have been shown to be familial, and parenting is a contributing factor to the development of these disorders. To extend this research, we examined the extent to which mother and father depression and negative, unsupportive parenting related to child internalising behaviour problems, in children with ID or with typical development (TD). Participants were 156 mother and father dyads and their children, assessed at ages 4 and 5 years. We examined parent (mother and father) and child delay status (ID and TD) in relation to measures of both observed and self-reported unsupportive, negative parenting. Utilising moderation models, we examined the relationship between parental depression, unsupportive/negative parenting and child internalising behaviour problems. Unsupportive, negative parenting differed based on parent gender and child delay status. In addition, father depression was a significant moderator of the relationship between unsupportive parenting and child internalising behaviour problems. Children with ID were found to be at higher risk of experiencing unsupportive, negative parenting than children with TD. Children of depressed fathers were especially vulnerable to developing internalising behaviour problems in an unsupportive parenting context. © 2016 MENCAP and International Association of the Scientific Study of Intellectual and Developmental Disabilities and John Wiley & Sons Ltd.

An approach to constitutional delay of growth and puberty

Directory of Open Access Journals (Sweden)

Ashraf T Soliman

2012-01-01

Full Text Available Constitutional delay of growth and puberty is a transient state of hypogonadotropic hypogonadism associated with prolongation of childhood phase of growth, delayed skeletal maturation, delayed and attenuated pubertal growth spurt, and relatively low insulin-like growth factor-1 secretion. In a considerable number of cases, the final adult height (Ht does not reach the mid-parental or the predicted adult Ht for the individual, with some degree of disproportionately short trunk. In the pre-pubertal male, testosterone (T replacement therapy can be used to induce pubertal development, accelerate growth and relieve the psychosocial complaints of the adolescents. However, some issues in the management are still unresolved. These include type, optimal timing, dose and duration of sex steroid treatment and the possible use of adjunctive or alternate therapy including: oxandrolone, aromatase inhibitors and human growth hormone.

[Delayed identity development, family relationships and psychopathology: Links between healthy and clinically disturbed youth].

Science.gov (United States)

Seiffge-Krenke, Inge; Escher, Fabian J

2018-05-01

This study compared three groups of various age and health status (total N = 732) with respect to their identity status, stress level, and parental behavior. As expected, patients were characterized by delayed identity development, particularly ruminative exploration. Further, patients experienced high identity stress and described high levels of anxious paternal rearing and intrusive maternal psychological control. The patients‘ levels of both internalizing and externalizing symptomatology were high, and the impact of externalizing symptoms on identity arrest was strong. Identity status was delayed, albeit age adequate in both groups of healthy youths, with comparably high levels of anxious parental monitoring. Compared to adolescents, young adults were particularly active in their identity development, showing a high level of identity stress but no increase in psychopathology.

Mobilities of positive ions in gas ionization chambers

International Nuclear Information System (INIS)

Kusumegi, Asao

1990-01-01

Observed ion mobilities of organic molecules in Ar are compared with a complete polarization model to examine the performance of the model, and its applicability is discussed. In spite of its simplicity, the polarization model (small sphere limit) is found to agree satisfactorily with observed mobilities in the case of alkali ions in Ar. However, the model fails to account for the mobility of Ar + in Ar due to a resonant charge transfer interaction between the ion and the parent gas. On the other hand, the values of k, a parameter which depends on the kinetic and the potential energy of the relevant ion, derived from observed ion mobilities of organic molecules in Ar and in the parent gas are found to be close to each other. Except for few cases, it appears that the complete polarization model gives a reasonable approximation for the positive ion mobilities of organic molecules in Ar, though the importance of the ion mass identification is significant in considering the applicability of the model to the positive ion mobility of those organic molecules in Ar used in a gas ionization chamber. (N.K.)

Triplet formation in the ion recombination in irradiated liquids

International Nuclear Information System (INIS)

Bartczak, W.M.; Tachiya, M.; Hummel, A.

1990-01-01

The formation of singlet and triplet excited stages in the ion recombination in groups of oppositely charged ions (or positive ions and electrons) in nonpolar liquids, as occurs in the tracks of high energy electrons, is considered. Theoretical studies on triplet formation in groups of ion pairs have thus far concentrated on the case where recombination of the negative ions with any of the positive ions in the group is equally probable (random recombination). In this paper the probability for geminate recombination (electron and parent positive ion) vs cross-recombination (an electron with a positive ion other than its parent ion) in multiple ion pair groups is calculated by computer simulation and the effect of the initial spatial configuration of the charged species is investigated. It is also shown explicitly that the probability for singlet formation as a result of cross recombination is equal to 1/4, when spin relaxation by magnetic interaction with the medium and by exchange interaction can be neglected. The effect of the preferential recombination on the singlet formation probability is illustrated and recent experimental results on singlet to triplet ratios are discussed. (author)

Language Delay in 3-Year-Old Children With ADHD Symptoms.

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Rohrer-Baumgartner, Nina; Zeiner, Pål; Eadie, Patricia; Egeland, Jens; Gustavson, Kristin; Reichborn-Kjennerud, Ted; Aase, Heidi

2016-10-01

Little is known about cognition in preschoolers with ADHD and language delay (LD). The objective was to investigate cognitive functions in preschoolers with ADHD symptoms and LD compared with children with ADHD symptoms only and to estimate the frequency of children with ADHD symptoms, co-occurring language delay, and delays on cognitive measures. Participants were recruited from the Norwegian Mother and Child Cohort Study. The teacher report of expressive language and the cognitive tests from 119 3-year-old children with parent reported ADHD symptoms and LD were compared with those of 258 children with ADHD symptoms only. The ADHD + LD group performed significantly worse than the ADHD group on most language-related measures. There were no differences between the groups on most nonverbal measures. Single measures had a limited potential of differentiating between the groups. ADHD symptoms and co-occurring LD in preschoolers were characterized by cognitive deficits associated with both disorders, not with global neurodevelopmental delay. © The Author(s) 2013.

Delayed luminescence in a multiparameter approach to evaluation and reduction of radiobiological risks

Science.gov (United States)

Grasso, Rosaria; Cammarata, Francesco Paolo; Minafra, Luigi; Marchese, Valentina; Russo, Giorgio; Manti, Lorenzo; Musumeci, Francesco; Scordino, Agata

2017-07-01

In the framework of the research project ETHICS "Pre-clinical experimental and theoretical studies to improve treatment and protection by charged particles" funded by the National Nuclear Physics Institute, Italy, we studied the phenomenon called delayed luminescence emitted by non-tumorigenic breast epithelial MCF10A cell line after proton irradiation at different doses (0.5, 2, 6, 9 Gy). The aim is to found possible correlations between delayed luminescence and in vitro damaging induced by ion irradiation. The first results of this research show that the delayed luminescence kinetics is proton dose dependent. An interesting correlation between delayed luminescence and clonogenic potential was observed.

Pathways to diagnosis: a qualitative study of the experiences and emotional reactions of parents of children diagnosed with type 1 diabetes.

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Rankin, David; Harden, Jeni; Waugh, Norman; Noyes, Kathryn; Barnard, Katharine D; Stephen, John; Robertson, Kenneth J; Bath, Louise; Robertson, Linda; Lawton, Julia

2014-12-01

The aim of this study was to explore from parents' perspectives the circumstances and events which led to their child being diagnosed with type 1 diabetes (T1D). The objective was to understand reasons for delays in seeking treatment and parents' emotional reactions to diagnosis so others can be better informed and supported in future. In-depth interviews with 54 parents of children (aged ≤12 yr) with T1D were conducted. Data analysis used an inductive, thematic approach. Parents described a 'prompt' and a 'delayed' pathway to their child being diagnosed. Parents who considered the diagnosis to be 'prompt' reported how they, or other people, had recognized their child had developed symptoms of T1D which resulted in a rapid presentation to health care professionals. In contrast, parents who perceived their child's diagnosis to be 'delayed' did not recognize signs of T1D and attributed their child's deteriorating health to other conditions, being out of routines and/or their stage of development. These parents often only sought medical help when symptoms became extreme. All parents were distressed by their child's diagnosis; however, parents in the 'delayed' pathway expressed unresolved feelings of guilt, particularly when their child was diagnosed with diabetic ketoacidosis. Parents' and other people's knowledge about T1D can affect the duration between onset of their child's symptoms and diagnosis. Campaigns to raise awareness should ensure that parents are made aware of symptoms and that T1D can develop during childhood. Health care professionals could discuss with parents the events preceding their child's diagnosis to better determine their emotional support needs. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

Neutron generator tube ion source control apparatus

International Nuclear Information System (INIS)

Bridges, J.R.

1982-01-01

A pulsed neutron well logging system includes a neutron generator tube of the deuterium-tritium accelerator type and an ion source control apparatus providing extremely sharply time-defined neutron pulses. A low voltage control pulse supplied to an input by timing circuits turns a power FET on via a buffer-driver whereby a 2000 volt pulse is produced in the secondary of a pulse transformer and applied to the ion source of the tube. A rapid fall in this ion source control pulse is ensured by a quenching circuit wherein a one-shot responds to the falling edge of the control pulse and produces a 3 microsecond delay to compensate for the propagation delay. A second one-shot is triggered by the falling edge of the output of the first one-shot and gives an 8 microsecond pulse to turn on the power FET which, via an isolation transformer turns on a series-connected transistor to ground the secondary of the pulse transformer and the ion source. (author)

Relationship Focused Intervention (RFI): Enhancing the Role of Parents in Children's Developmental Intervention

OpenAIRE

Mahoney, Gerald

2014-01-01

This article describes Relationship Focused Intervention (RFI) which attempts to promote the development of young children with developmental delays and disabilities by encouraging parents to engage in highly responsive interactions during daily routines with their children. This approach to intervention is based upon the Parenting Model of child development and was derived from research on parent-child interaction. Evidence is presented that RFI can be effective both at helping parents to le...

Relationship Focused Intervention (RFI): Enhancing the Role of Parents in Children's Developmental Intervention

OpenAIRE

Mahoney, Gerald

2009-01-01

This article describes Relationship Focused Intervention (RFI) which attempts to promote the development of young children with developmental delays and disabilities by encouraging parents to engage in highly responsive interactions during daily routines with their children. This approach to intervention is based upon the Parenting Model of child development and was derived from research on parent-child interaction. Evidence is presented that RFI can be effective both at helping parents to le...

The impact of fear, secrecy, and stigma on parental disclosure of HIV status to children: a qualitative exploration with HIV positive parents attending an ART clinic in South Africa.

Science.gov (United States)

Madiba, Sphiwe

2012-11-28

South Africa is one of the sub Saharan countries where considerable progress in providing antiretroviral treatment (ART) has been made. The increased access to ART contributes to improvements in the prognosis of HIV and parents are more likely to raise their children than ever before. The study examined the social context influencing disclosure of parental HIV status to children from the perspectives of fathers and mothers accessing ART from an academic hospital in South Africa. Three focus group interviews were conducted with 26 non-disclosed biological parents of children aged between 7 and 18 years. Their ages ranged between 20-60 years and they cared for a total of 60 children. Parental decision not to disclose their HIV status to children was influenced by the fear of death and dying, the influence of television and media, stigma and discrimination. Parents delayed disclosure of their HIV status to children because children believed that AIDS kills. Parents also feared that the child may not be able to keep the parent's HIV status secret and might result in the family being subjected to stigma, discrimination, and isolation. Fear of stigma and discrimination were also responsible for the continuous efforts by parents to protect their HIV status from their children, family and neighbour's. Parents also delayed disclosure to children because they lacked disclosure skills and needed support for disclosure from health care providers. Healthcare providers are in a unique position to provide such support and guidance and assist parents to disclose and children to cope with parental HIV infection.

Does predation danger on southward migration curtail parental investment by female western sandpipers?

NARCIS (Netherlands)

Jamieson, S.E.; Ydenberg, R.C.; Lank, D.B.

2014-01-01

Theory predicts that if extending parental care delays migratory departure, and if later migration is more dangerous, then parental care should be curtailed to make an earlier departure. Adult western sandpipers (Calidris mauri) depart Alaska in July, and the presence of peregrine falcons (Falco

Interaction between parental psychosis and early motor development and the risk of schizophrenia in a general population birth cohort.

Science.gov (United States)

Keskinen, E; Marttila, A; Marttila, R; Jones, P B; Murray, G K; Moilanen, K; Koivumaa-Honkanen, H; Mäki, P; Isohanni, M; Jääskeläinen, E; Miettunen, J

2015-09-01

Delayed motor development in infancy and family history of psychosis are both associated with increased risk of schizophrenia, but their interaction is largely unstudied. To investigate the association of the age of achieving motor milestones and parental psychosis and their interaction in respect to risk of schizophrenia. We used data from the general population-based prospective Northern Finland Birth Cohort 1966 (n=10,283). Developmental information of the cohort members was gathered during regular visits to Finnish child welfare clinics. Several registers were used to determine the diagnosis of schizophrenia among the cohort members and psychosis among the parents. Altogether 152 (1.5%) individuals had schizophrenia by the age of 46 years, with 23 (15.1%) of them having a parent with psychosis. Cox regression analysis was used in analyses. Parental psychosis was associated (Prisk for schizophrenia was increased if holding the head up (hazard ratio [HR]: 2.46; degrees of freedom [df]=1; 95% confidence interval [95% CI]: 1.07-5.66) and touching the thumb with the index finger (HR: 1.84; df=1; 95% CI: 1.11-3.06) was later. In the group without parental psychosis, a delay in the following milestones increased the risk of schizophrenia: standing without support and walking without support. Parental psychosis had an interaction with delayed touching thumb with index finger (HR: 1.87; df=1; 95% CI: 1.08-3.25) when risk of schizophrenia was investigated. Parental psychosis was associated with achieving motor milestones later in infancy, particularly the milestones that appear early in a child's life. Parental psychosis and touching the thumb with the index finger had a significant interaction on risk of schizophrenia. Genetic risk for psychosis may interact with delayed development to raise future risk of schizophrenia, or delayed development may be a marker of other risk processes that interact with genetic liability to cause later schizophrenia. Copyright © 2015

Parent Perceptions of the Impact of Stuttering on Their Preschoolers and Themselves

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Langevin, Marilyn; Packman, Ann; Onslow, Mark

2010-01-01

Speech-language pathologists (SLPs) are advised to consider the distress of preschoolers and parents along with the social consequences of the child's stuttering when deciding whether to begin or delay treatment. Seventy-seven parents completed a survey that yielded quantitative and qualitative data that reflected their perceptions of the impact…

[What is "normal"? Maternal parenting behavior as risk and protective factor for psychopathology and identity diffusion].

Science.gov (United States)

Seiffge-Krenke, Inge; Escher, Fabian J

2018-06-01

What is "normal"? Maternal parenting behavior as risk and protective factor for psychopathology and identity diffusion Objectives: This study analyzes the implications of today's highly altered maternal parenting behaviors on children's development and psychological health. The relationship between maternal parenting behaviors (support, psychological control, and anxious monitoring) and delayed identity development or identity diffusion as well as internalizing or externalizing symptomatology was investigated in a sample of 732 youths (301 adolescents, 351 young adults, and 80 patients). Cluster analysis identified two types of maternal parenting behaviors: authoritative maternal behavior and dysfunctionalmaternal behavior. As expected, patients exhibited a high degree of dysfunctional maternal parenting behavior (low support, high psychological control), delayed identity development as well as elevated identity diffusion and symptomatology.Authoritative maternal parenting emerged as a protective factor in the prediction of identity diffusion and symptomatology.All three groups described a high degree of anxious maternal monitoring. The implications of changed maternal parenting behaviors on identity diffusion and symptomatology are discussed in light of societal changes and changing criteria of personality disorders in the new DSM-5.

Television viewing in Thai infants and toddlers: impacts to language development and parental perceptions

Directory of Open Access Journals (Sweden)

Kriweradechachai Suntree

2009-05-01

Full Text Available Abstract Background Effects of television to language development in infants and toddlers, especially in the Asian children, are inconclusive. This study aimed to (a study time spent on television in Thai infants and toddlers (age Methods Two hundred and sixty children and their parents were recruited into the study. Time spent on television and parental perceptions on television viewing toward their child's development were recorded during face-to-face and telephone interviews. Language development was assessed at the age of 2 years using the Clinical Linguistic Auditory Milestone Scale (CLAMS, and parents' report. Association between delayed language development and time spent on television viewing, as well as other various parameters such as gender, maternal education and family income, were analysed using a multivariate logistic regression model. Results Most Thai infants and toddlers watched television at the age of 6 months, 1 year and 2 years old (98.0, 95.3 and 96.7%, respectively. On average, 1-year-old children watched television 1.23 ± 1.42 hours per day. This increased to 1.69 ± 1.56 hours per day when they were 2 years old. However, watching television longer than 2 hours per day did not associate with delayed language development. On multivariate logistic regression analysis, gender (male was the only significant factor associated with delayed language development (OR = 6.9, 95% CI = 1.5–31.3. Moreover, 75%, 71%, and 66% of Thai parents believed that television viewing yielded benefits to children's developments. Conclusion Thai children commenced watching television at an early age and the amount of television viewing time increased by age. Most parents had positive perceptions to television viewing. The study found no association between time spent on television viewing (≥ 2 hours per day and delayed language development at the age of 2 years. Gender (male was the only variable associated with delayed language development.

Television viewing in Thai infants and toddlers: impacts to language development and parental perceptions

Science.gov (United States)

Ruangdaraganon, Nichara; Chuthapisith, Jariya; Mo-suwan, Ladda; Kriweradechachai, Suntree; Udomsubpayakul, Umaporn; Choprapawon, Chanpen

2009-01-01

Background Effects of television to language development in infants and toddlers, especially in the Asian children, are inconclusive. This study aimed to (a) study time spent on television in Thai infants and toddlers (age television (as recommended by the American Academy of Paediatrics (AAP), television toward their child's development. Methods Two hundred and sixty children and their parents were recruited into the study. Time spent on television and parental perceptions on television viewing toward their child's development were recorded during face-to-face and telephone interviews. Language development was assessed at the age of 2 years using the Clinical Linguistic Auditory Milestone Scale (CLAMS), and parents' report. Association between delayed language development and time spent on television viewing, as well as other various parameters such as gender, maternal education and family income, were analysed using a multivariate logistic regression model. Results Most Thai infants and toddlers watched television at the age of 6 months, 1 year and 2 years old (98.0, 95.3 and 96.7%, respectively). On average, 1-year-old children watched television 1.23 ± 1.42 hours per day. This increased to 1.69 ± 1.56 hours per day when they were 2 years old. However, watching television longer than 2 hours per day did not associate with delayed language development. On multivariate logistic regression analysis, gender (male) was the only significant factor associated with delayed language development (OR = 6.9, 95% CI = 1.5–31.3). Moreover, 75%, 71%, and 66% of Thai parents believed that television viewing yielded benefits to children's developments. Conclusion Thai children commenced watching television at an early age and the amount of television viewing time increased by age. Most parents had positive perceptions to television viewing. The study found no association between time spent on television viewing (≥ 2 hours per day) and delayed language development at the

Analysis and optimization of RC delay in vertical nanoplate FET

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Woo, Changbeom; Ko, Kyul; Kim, Jongsu; Kim, Minsoo; Kang, Myounggon; Shin, Hyungcheol

2017-10-01

In this paper, we have analyzed short channel effects (SCEs) and RC delay with Vertical nanoplate FET (VNFET) using 3-D Technology computer-aided design (TCAD) simulation. The device is based on International Technology Road-map for Semiconductor (ITRS) 2013 recommendations, and it has initially gate length (LG) of 12.2 nm, channel thickness (Tch) of 4 nm, and spacer length (LSD) of 6 nm. To obtain improved performance by reducing RC delay, each dimension is adjusted (LG = 12.2 nm, Tch = 6 nm, LSD = 11.9 nm). It has each characteristic in this dimension (Ion/Ioff = 1.64 × 105, Subthreshold swing (S.S.) = 73 mV/dec, Drain-induced barrier lowering (DIBL) = 60 mV/V, and RC delay = 0.214 ps). Furthermore, with long shallow trench isolation (STI) length and thick insulator thickness (Ti), we can reduce RC delay from 0.214 ps to 0.163 ps. It is about a 23.8% reduction. Without decreasing drain current, there is a reduction of RC delay as reducing outer fringing capacitance (Cof). Finally, when source/drain spacer length is set to be different, we have verified RC delay to be optimum.

Emotion discourse, social cognition, and social skills in children with and without developmental delays.

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Fenning, Rachel M; Baker, Bruce L; Juvonen, Jaana

2011-01-01

This study examined parent-child emotion discourse, children's independent social information processing, and social skills outcomes in 146 families of 8-year-olds with and without developmental delays. Children's emergent social-cognitive understanding (internal state understanding, perspective taking, and causal reasoning and problem solving) was coded in the context of parent-child conversations about emotion, and children were interviewed separately to assess social problem solving. Mothers, fathers, and teachers reported on children's social skills. The proposed strengths-based model partially accounted for social skills differences between typically developing children and children with delays. A multigroup analysis of the model linking emotion discourse to social skills through children's prosocial problem solving suggested that processes operated similarly for the two groups. Implications for ecologically focused prevention and intervention are discussed. © 2011 The Authors. Child Development © 2011 Society for Research in Child Development, Inc.

Parents and Young Children with Disabilities: The Effects of a Home-Based Music Therapy Program on Parent-Child Interactions.

Science.gov (United States)

Yang, Yen-Hsuan

2016-01-01

Responsive parenting style and synchronous parent-child interactions have a positive impact on children in terms of language, cognitive, and social-emotional development. Despite widely documented benefits of music therapy on parent-child interactions, empirical evidence for the effects of music therapy on parent-child synchrony is lacking. To examine effects of parent-child dyads' participation in a six-week home-based music therapy program on parent response, child initiation, and parent-child synchrony, as well as parents' daily use of musical activities with their child. Twenty-six parent-child dyads participated in this pretest-posttest within-subject single-group design study. Participating dyads included parents and their child with disabilities or developmental delays (ages 1-3 years inclusive). Parent-child dyads participated in a home-based music therapy program that included six weekly 40-minute sessions, and incorporated five responsive teaching strategies (i.e., affect, match, reciprocity, shared control, and contingency). Observational data were recorded for parent-child interactions and parent-child synchrony. Parents' positive physical and verbal responses, as well as children's positive verbal initiations, increased significantly pre- to post-intervention; however, children's positive physical initiations did not increase significantly. Parent-child synchrony also improved significantly pre- to post-intervention. Findings support the use of home-based music therapy programs to facilitate parent-child interactions in the areas of parental responsiveness and child-initiated communication, as well as parent-child synchrony. © the American Music Therapy Association 2015. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Delayed massive epistaxis from traumatic cavernous carotid false aneurysms: A report of two unusual cases.

Science.gov (United States)

Mankahla, Ncedile; LeFeuvre, David; Taylor, Allan

2017-08-01

Introduction Blunt head trauma can injure the cavernous segment of the internal carotid artery (ICA). This may result in a carotid cavernous fistula (CCF). Rarely, a traumatic aneurysm may bleed medially causing massive epistaxis. Case presentation We present two cases of traumatic intracavernous carotid pseudoaneurysms with delayed massive epistaxis. The patients were managed with endovascular treatment involving coil embolization with parent vessel sparing and detachable balloon occlusion with carotid sacrifice. Early clinical outcome was good in both patients. Wherever possible, the CARE 1 guidelines were followed in the reporting. Conclusion These cases illustrate the delayed nature of traumatic aneurysms and the need for a high index of suspicion in the presence of skull base fractures. The use of endovascular detachable balloon occlusion and coil embolization treatment with parent vessel preservation is shown.

Muenster Parental Programme empowers parents in communicating with their infant with hearing loss.

Science.gov (United States)

Glanemann, Reinhild; Reichmuth, Karen; Matulat, Peter; Zehnhoff-Dinnesen, Antoinette Am

2013-12-01

With the implementation of the Universal Newborn Hearing Screening (UNHS), the age of diagnosis of children with hearing loss (HL) has been steadily declining in the past years. Consequently, there is a need for early educational intervention methods that are suitable for infants at the preverbal level. To meet this need we have developed and evaluated the Muenster Parental Programme (MPP), a responsive parenting programme for parents of children with HL aged 3-18 months. It aims at enhancing the parents' communicative skills towards their child. The MPP is introduced following confirmation of a HL. Flanked by two individual counselling sessions, the programme comprises six group sessions and two single training sessions with video feedback. The focus of the programme lies in enhancing parents' responsive behaviour and in reducing inappropriate initiative behaviour. The present study involved 29 parents of 24 children aged 6.6 (mean, range: 3-12) months at the outset of the MPP. The children's degree of HL ranged from moderate to profound. Parents of children with unilateral HL and/or risk for an additional developmental delay were included. The prospective study compared parent communication skills of a trained (N = 15) versus a control group (N = 14) before and after the MPP. For this purpose, instances of responsive behaviour to the signals of the child and total time of initiative behaviour within a 4-min video-sample were measured before and after completion of the study in both groups. Trained parents could enhance their responsiveness to vocal and preverbal signals of the child (Wilcoxon test, p = .002) and also their responsiveness to non-verbal signals (Wilcoxon test, p parents reduced their inappropriate initiative behaviour (related t-test, p parental responsiveness to infants with HL is of great importance as these early behaviours underlie later acquisition of speech, language, hearing and social communication skills. The MPP constitutes the first

Promoting Parent-Child Sexual Health Dialogue with an Intergenerational Game: Parent and Youth Perspectives.

Science.gov (United States)

D'Cruz, Jina; Santa Maria, Diane; Dube, Sara; Markham, Christine; McLaughlin, Jeffrey; Wilkerson, Johnny M; Peskin, Melissa F; Tortolero, Susan; Shegog, Ross

2015-04-01

Sexual health discussions between parents and their preadolescent youth can delay sexual debut and increase condom and contraceptive use. However, parents frequently report being uncomfortable talking with their youth about sex, often reporting a lack of self-efficacy and skills to inform and motivate responsible decision making by youth. Intergenerational games may support parent-youth sexual health communication. The purpose of this study was to explore parent and youth perspectives on a proposed intergenerational game designed to increase effective parent-youth sexual health communication and skills training. Eight focus groups were conducted: four with parents (n=20) and four with their 11-14-year-old youth (n=19), to identify similarities and differences in perspectives on gaming context, delivery channel, content, and design (components, features, and function) that might facilitate dyadic sexual health communication. Participants concurred that a sex education game could improve communication while being responsive to family time constraints. They affirmed the demand for an immersive story-based educational adventure game using mobile platforms and flexible communication modalities. Emergent themes informed the development of a features inventory (including educational and gaming strategies, communication components, channel, and setting) and upper-level program flow to guide future game development. This study supports the potential of a game to be a viable medium to bring a shared dyadic sexual health educational experience to parents and youth that could engage them in a motivationally appealing way to meaningfully impact their sexual health communication and youth sexual risk behaviors.

The Effects of Sensory Processing and Behavior of Toddlers on Parent Participation: A Pilot Study

Science.gov (United States)

DaLomba, Elaina; Baxter, Mary Frances; Fingerhut, Patricia; O'Donnell, Anne

2017-01-01

Occupational therapists treat children with sensory processing and behavioral concerns, however, little information exists on how these issues affect parent participation. This pilot study examined the sensory processing and behaviors of toddlers with developmental delays and correlated these with parents' perceived ability to participate in…

Peculiar time dependence of unexpected lines in delayed beam-foil X-ray spectra of V, Fe and Ni

International Nuclear Information System (INIS)

Ahmad, Nissar; Karn, Ranjeet K.; Marketos, Pan; Nandi, T.

2005-01-01

Delayed beam-foil X-ray spectra of highly charged ions of V, Fe and Ni show a few lines at energies higher than the H-like Lyman α-line of the respective projectile ions. These can only be attributed to heavier ions. Further the time dependence of such unexpected lines display a peculiar behavior. This work presents the experimental observations systematically

The language and culture of delay.

Science.gov (United States)

Sakai, Christina; Shetgiri, Rashmi; Flores, Glenn; Caronna, Elizabeth; Khandekar, Aasma; Augustyn, Marilyn

2010-04-01

Satish is a 3 (1/2)-year-old boy you are seeing in your primary care office for a "sick visit" due to parental concerns about his language development. He is the only child of a couple who immigrated to the United States from India shortly before his birth. He received early intervention services for speech and language delays for a few months before he attained 2 years of age. However, services were discontinued when the family moved back to India for a year. After the family returned to the United States, they lived in a different state for several months before moving again recently to his current home, so he is relatively new to your practice. Satish's mother is concerned not only about his communication skills but also about his attention and social skills. She notes that he often plays alone or in parallel with other children. She was also told by his first pediatrician that Satish had "a limited imagination." His parents feel that he has pretend play, in that he will pretend to get his haircut, talk on the phone, or ride on a train. Satish was born at term without complications. He passed his newborn hearing screen and a repeat hearing test at the age of 2 years. He has had no medical problems and takes a daily multivitamin. His parents are both of Indian descent. Satish's father is an engineer and had a history of being a late talker. His mother graduated from high school and is a homemaker. They are expecting their second child. Satish's developmental history is significant for language delays. He babbled at 6 months but did not have single words until he was 2 years. When he was 2 (1/2) years, he had 2 to 3 word sentences. He responded to his name at 15 months and could follow single step commands by the age of 2 years. Currently, Satish is noted to have difficulty with "back and forth conversation." He sometimes repeats what others are saying.The family speaks Hindi, their native language, exclusively at home. When Satish speaks, he usually speaks in

Teenage parents and their offspring.

Science.gov (United States)

Kaufman, J

1996-06-18

Teenage parents are cast into adult roles before the role experimentation and identity development tasks of middle adolescence can be completed. Understanding the etiology of this social problem requires an ecological perspective encompassing individual characteristics, person-context variables, and societal factors such as race and social class. Risk factors identified in the literature on adolescent pregnancy in the US include: absence of a future orientation or aspirations, lack of assertiveness and interpersonal skills to control physical intimacy, low socioeconomic status and minority group membership, growing up in a single-parent family, a history of sexual abuse, five or more siblings, a sister or friend who became a teenage mother, lax parental supervision of dating and free time, low self-esteem, and dropping out or failing in school. The limited data on adolescent fathers suggest they have histories of substance use, delinquency, failure to graduate from high school, financial difficulty, and exposure to family violence. The offspring of adolescent parents show a higher incidence of developmental delays and mild mental retardation than children of adults and are at increased risk of child abuse and neglect. Teen parents raised in dysfunctional families tend to perpetuate destructive methods of child rearing and have unrealistic, age-inappropriate expectations for infants and toddlers. Teenage parents' lack of competence can be mitigated, however, by positive living arrangements, a supportive family of origin, peer support groups, quality child care, school-based services, and accurate information about parenting and child development.

Family Involvement in Early Intervention Service Planning: Links to Parental Satisfaction and Self-Efficacy

Science.gov (United States)

Popp, Tierney K.; You, Hyun-Kyung

2016-01-01

The mediating role of parental satisfaction in the relation between family involvement in early intervention service planning and parental self-efficacy was explored. Participants included families of children with disability or delay involved in early intervention (n = 2586). Data were examined upon entry into early intervention (T1) and at…

Effects of media messages on parent-child sexual communication.

Science.gov (United States)

Evans, W Douglas; Davis, Kevin C; Silber Ashley, Olivia; Khan, Munziba

2012-01-01

Parent-child communication about sex is an important reproductive health outcome. Consistent, positive perceptions of communication by parents and children can promote behavioral outcomes such as delaying sexual debut and increasing contraceptive use. The authors investigated whether exposure to messages from the Parents Speak Up National Campaign (PSUNC), a social marketing campaign to promote increased parent-child sexual communication, led to increased children's self-reports of communication. Also, the authors examined whether PSUNC message exposure increased agreement about communication between parents and their children. In a randomized experimental design, the authors surveyed children of parents exposed and not exposed to PSUNC messages. Parents and children completed online instruments asking matched questions about sexual attitudes, beliefs, and communication. The authors matched 394 parents and children for analysis. They used ordinal logistic regression modeling and kappa statistics. Children of parents exposed to PSUNC messages were more likely to (a) report sexual communication than were those not exposed and (b) agree with their parents about extent and content. Parent-child pairs of the same gender, younger pairs, and non-White pairs were more likely to agree. Overall, PSUNC message exposure appears to have promoted more extensive sexual communication. Future research should examine behavioral mechanisms and message receptivity among subgroups of parents and children.

Cell-cycle-dependent repair of heavy-ion damage

International Nuclear Information System (INIS)

Blakely, E.A.; Chang, P.Y.; Lommel, L.; Tobias, C.A.

1985-01-01

Synchronized human T-1 cells have been used to investigate the G1-phase age dependence of repair of potentially lethal damage (PLDR). The cells were irradiated with single doses of either 225 kVp X rays or Bragg-peak 425 MeV/μ neon ions at ages between 1.5 and 6.0 hrs after mitotic selection, and then either trypsinized and plated immediately, or held at 37 0 C for 6 hrs in PBS, or PBS containing 60μM of the DNA-polymerase-inhibitor 1-β-D-arabinofurano-syladenine (β-araA) before trypsinization and plating. Delayed plating showed significant PLDR at all ages irradiated with X rays, with the increase of survival varying between 2- to 8-fold. At equivalent survival levels, there was a reduced capacity for PLDT at each cell age irradiated with neon ions. In early G1 after neon-ion exposures, delayed plating actually enhanced cell killing; whereas, in late G1 the survival increased about 2-fold. β-araA almost completely eliminated the PLDR after X rays, reducing the survival to that measured with immediate plating. β-araA slightly enhanced neon-ion cell killing at all cell ages

Bannayan-Riley-Ruvalcaba syndrome: a cause of extreme macrocephaly and neurodevelopmental delay.

LENUS (Irish Health Repository)

Lynch, N E

2012-02-01

BACKGROUND: Bannayan-Riley-Ruvalcaba syndrome (BRRS) is an autosomal dominant condition characterised by macrocephaly, developmental delay and subtle cutaneous features. BRRS results from mutations in the PTEN gene. In adults, PTEN mutations cause Cowden syndrome where, in addition to the macrocephaly, there is a higher risk of tumour development. Diagnosis of BRRS is often delayed as presentation can be variable, even within families. AIMS: To identify characteristics of this condition which might facilitate early diagnosis. Prompt diagnosis not only avoids unnecessary investigations in the child but potentially identifies heterozygote parents who are at risk of tumour development. METHODS AND RESULTS: Six children with a PTEN mutation were identified. All had extreme macrocephaly. Four parents and a male sibling were found to have a PTEN mutation on subsequent testing. Affected parents had extreme macrocephaly and a history of thyroid adenoma, or breast or skin lesions. All six children had presented to medical attention before the age of 2.5 years (3\\/6 were investigated as neonates), but the median age at diagnosis was 5 years. Four of the children had multiple investigations prior to identification of a PTEN mutation. CONCLUSION: BRRS should be considered in children with extreme macrocephaly as it is the most consistent clinical feature seen, particularly where there is a family history of macrocephaly.

Micromachined silicon parallel acoustic delay lines as time-delayed ultrasound detector array for real-time photoacoustic tomography

Science.gov (United States)

Cho, Y.; Chang, C.-C.; Wang, L. V.; Zou, J.

2016-02-01

This paper reports the development of a new 16-channel parallel acoustic delay line (PADL) array for real-time photoacoustic tomography (PAT). The PADLs were directly fabricated from single-crystalline silicon substrates using deep reactive ion etching. Compared with other acoustic delay lines (e.g., optical fibers), the micromachined silicon PADLs offer higher acoustic transmission efficiency, smaller form factor, easier assembly, and mass production capability. To demonstrate its real-time photoacoustic imaging capability, the silicon PADL array was interfaced with one single-element ultrasonic transducer followed by one channel of data acquisition electronics to receive 16 channels of photoacoustic signals simultaneously. A PAT image of an optically-absorbing target embedded in an optically-scattering phantom was reconstructed, which matched well with the actual size of the imaged target. Because the silicon PADL array allows a signal-to-channel reduction ratio of 16:1, it could significantly simplify the design and construction of ultrasonic receivers for real-time PAT.

Micromachined silicon parallel acoustic delay lines as time-delayed ultrasound detector array for real-time photoacoustic tomography

International Nuclear Information System (INIS)

Cho, Y; Chang, C-C; Zou, J; Wang, L V

2016-01-01

This paper reports the development of a new 16-channel parallel acoustic delay line (PADL) array for real-time photoacoustic tomography (PAT). The PADLs were directly fabricated from single-crystalline silicon substrates using deep reactive ion etching. Compared with other acoustic delay lines (e.g., optical fibers), the micromachined silicon PADLs offer higher acoustic transmission efficiency, smaller form factor, easier assembly, and mass production capability. To demonstrate its real-time photoacoustic imaging capability, the silicon PADL array was interfaced with one single-element ultrasonic transducer followed by one channel of data acquisition electronics to receive 16 channels of photoacoustic signals simultaneously. A PAT image of an optically-absorbing target embedded in an optically-scattering phantom was reconstructed, which matched well with the actual size of the imaged target. Because the silicon PADL array allows a signal-to-channel reduction ratio of 16:1, it could significantly simplify the design and construction of ultrasonic receivers for real-time PAT. (paper)

Comparison of anxiety and child-care education characteristics of mothers who have children with or without speech delays.

Science.gov (United States)

Özdaş, Talih; Şahlı, Ayşe Sanem; Özdemir, Behiye Sarıkaya; Belgin, Erol

2018-01-05

Speech delay in a child could be the cause and/or result of the emotional disorder. The child rearing attitude that the parents have accepted could have both positive and negative effects on the personality of the child. The current study aimed to investigate the sociodemographic features and the mothers' anxiety of children with speech delay. One hundred five mothers with children aged between 3 and 6 years with speech delays were included in the patient group, and 105 mothers who have children aged between 3 and 6 years with normal speech and language development were included in the control group. An information form questionnaire including demographic characteristics, the Family Life and Childrearing Attitude Scale (PARI - Parental Attitude Research Instrument) and beck anxiety scale were requested from all mothers in the patient and the control groups. In the current study, there was a significant difference between the groups in terms of gender (p=0.001). According to Parental Attitude Research Instrument, the mean of mothers of the children with speech delays was higher than the mean of mothers of normal children in terms of the answers to overprotective mother aspect (poverprotective motherhood attitudes; however, the difference in terms of the answers to the aspects of democratic attitude and provision of equality, refusal to be a housewife, husband-wife conflict, and suppression and discipline were not statistically significant. The beck anxiety scale, a significant difference was detected between the two groups (p<0.01). It was found that the mothers of children with speech delays had more severe levels of anxiety. The social structure of the family, the attitudes and the behaviors of the mother, and the anxiety levels of the mothers have important effects on child development. Thus, it is necessary to perform further studies related to speech delays, in which many factors play a role in the etiology. Copyright © 2017 Associação Brasileira de

Nuclei far from the beta stability line. High-energy beta decay and delayed-particle emission

International Nuclear Information System (INIS)

Hansen, R.G.; Hornshj, P.

1976-01-01

Progress in on-line mass separation together with improved proton accelerators now permit the production of secondary ion-beams of the order of 10 11 atoms per second. Applications to the study of delayed-proton and delayed-alpha emission are discussed. These effects have been used for the estimation of alpha-emission strength functions at 4-6 MeV excitation energy, and for the determination of level densities through fluctuation analysis

Risk factors of delay proportional probability in diphtheria-tetanus-pertussis vaccination of Iranian children; Life table approach analysis

Directory of Open Access Journals (Sweden)

Mohsen Mokhtari

2015-01-01

Full Text Available Despite success in expanded program immunization for an increase in vaccination coverage in the children of world, timeliness and schedule of vaccination remains as one of the challenges in public health. This study purposed to demonstrate the related factors of delayed diphtheria-tetanus-pertussis (DTP vaccination using life table approach. A historical cohort study conducted in the poor areas of five large Iran cities. Totally, 3610 children with 24-47 months old age who had documented vaccination card were enrolled. Time of vaccination for the third dose of DTP vaccine was calculated. Life table survival was used to calculate the proportional probability of vaccination in each time. Wilcoxon test was used for the comparison proportional probability of delayed vaccination based on studies factors. The overall median delayed time for DTP3 was 38.52 days. The Wilcoxon test showed that city, nationality, education level of parents, birth order and being in rural areas are related to the high probability of delay time for DTP3 vaccination (P 0.05. Being away from the capital, a high concentration of immigrants in the city borders with a low socioeconomic class leads to prolonged delay in DTP vaccination time. Special attention to these areas is needed to increase the levels of parental knowledge and to facilitate access to the health services care.

Ion transmission in a linear radiofrequency spectrometer

International Nuclear Information System (INIS)

Gomet, J.-C.

1975-01-01

A linear radiofrequency spectrometer is used for the purpose of experimental determination of the absolute ionization cross sections of various ions obtained by electron impact on polyatomic molecules. The transmission of the apparatus is studied: it does not only depend on the mass resolution of the spectrometer, but also on the nature of ions. It is affected by charge transfers, especially for the parent ions. An empiric way of correction of the apparatus function is given which allows the use at 10 -6 Torr [fr

Mass Spectrometric Analysis of Eight Common Chemical Explosives Using Ion Trap Mass Spectrometer

Energy Technology Data Exchange (ETDEWEB)

Park, Sehwan; Lee, Jihyeon; KIm, Jeongkwon [Chungnam National Univ., Daejeon (Korea, Republic of); Cho, Soo Gyeong; Goh, Eun Mee [Agency for Defense Development, Daejeon (Korea, Republic of); Lee, Sungman; Koh, Sungsuk [Sensor Tech Inc., Seoul (Korea, Republic of)

2013-12-15

Eight representative explosives (ammonium perchlorate (AP), ammonium nitrate (AN), trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), cyclonite (RDX), cyclotetramethylenetetranitramine (HMX), pentaerythritol tetranitrate (PETN), and hexanitrostilbene (HNS)) were comprehensively analyzed with an ion trap mass spectrometer in negative ion mode using direct infusion electrospray ionization. MS/MS experiments were performed to generate fragment ions from the major parent ion of each explosive. Explosives in salt forms such as AP or AN provided cluster parent ions with their own anions. Explosives with an aromatic ring were observed as either [M.H]{sup -} for TNT and DNT or [M]{sup ·-}. for HNS, while explosives without an aromatic ring such as RDX, HMX, and PETN were detected as an adduct ion with a formate anion, i. e., [M+HCOO]{sup -}. These findings provide a guideline for the rapid and accurate detection of explosives once portable MS instruments become more readily available.

Mass Spectrometric Analysis of Eight Common Chemical Explosives Using Ion Trap Mass Spectrometer

International Nuclear Information System (INIS)

Park, Sehwan; Lee, Jihyeon; KIm, Jeongkwon; Cho, Soo Gyeong; Goh, Eun Mee; Lee, Sungman; Koh, Sungsuk

2013-01-01

Eight representative explosives (ammonium perchlorate (AP), ammonium nitrate (AN), trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), cyclonite (RDX), cyclotetramethylenetetranitramine (HMX), pentaerythritol tetranitrate (PETN), and hexanitrostilbene (HNS)) were comprehensively analyzed with an ion trap mass spectrometer in negative ion mode using direct infusion electrospray ionization. MS/MS experiments were performed to generate fragment ions from the major parent ion of each explosive. Explosives in salt forms such as AP or AN provided cluster parent ions with their own anions. Explosives with an aromatic ring were observed as either [M.H] - for TNT and DNT or [M] ·- . for HNS, while explosives without an aromatic ring such as RDX, HMX, and PETN were detected as an adduct ion with a formate anion, i. e., [M+HCOO] - . These findings provide a guideline for the rapid and accurate detection of explosives once portable MS instruments become more readily available

Mental Retardation and Parenting Stress

Directory of Open Access Journals (Sweden)

Eleni Siamaga

2011-01-01

Full Text Available Backround: The presence, upbringing and looking after of a mentally retarded child in the family, can become a threat to the mental health of its parents and is the main predisposing factor of stress for the parents.Aim: The purpose of this systematic review is (a to document the contemporary research bibliography related to the stress of parents with mentally retarded children, (b to aggregate the factors and secondary parameters based on the contemporary research related to the influence of the (child’s mental retardation on the parents and (c to show an intercultural aspect regarding the presence of stress to parents with mentally retarded children.Methods: Systematic review of research articles published in scientific journals included in the international academic databases HEAL-LING, SAGE, ELSEVIER, WILSON, SCIENCEDIRECT, MEDLINE, PUBMED, PsycINFO, Cochrane, EMBASE, SCIRUS and CINAHL having as search criteria and key words the terms («parental stress and mental retardation» [MeSH], «parenting stress and persons with special needs» [MeSH], «mental retardation and family problems» [MeSH], «stress and parents» [MeSH], «parenting and stress» [MeSH], «mental delay and parents» [MeSH], «developmental disabilities and family stress» [MeSH], «intellectual handicap and parenting» [MeSH], «maternal stress and child with disabilities» [MeSH].Discussion: The review has proven that all forms of mental retardation have an important -from a statistic point of viewimpacton the parents’ mental health. Anxiety, stress and depression are common symptoms mentioned by the parents.Additionally, there are individual variables such as the husband-wife relationship, the parents’ approach to their child’s disability, the parental strategies used in order to cope with the daily life of the child’s disability and the behavioural problems of their child, all of which contribute to the increase of the level of parental stress

Is It Really Self-Control? Examining the Predictive Power of the Delay of Gratification Task

Science.gov (United States)

Duckworth, Angela L.; Tsukayama, Eli; Kirby, Teri A.

2013-01-01

This investigation tests whether the predictive power of the delay of gratification task (colloquially known as the “marshmallow test”) derives from its assessment of self-control or of theoretically unrelated traits. Among 56 school-age children in Study 1, delay time was associated with concurrent teacher ratings of self-control and Big Five conscientiousness—but not with other personality traits, intelligence, or reward-related impulses. Likewise, among 966 preschool children in Study 2, delay time was consistently associated with concurrent parent and caregiver ratings of self-control but not with reward-related impulses. While delay time in Study 2 was also related to concurrently measured intelligence, predictive relations with academic, health, and social outcomes in adolescence were more consistently explained by ratings of effortful control. Collectively, these findings suggest that delay task performance may be influenced by extraneous traits, but its predictive power derives primarily from its assessment of self-control. PMID:23813422

Autonomy Support and Structure Enhance Children's Memory and Motivation to Reminisce: A Parental Training Study

Science.gov (United States)

Cleveland, Emily Sutcliffe; Morris, Ashley

2014-01-01

Thirty parents observed their preschoolers (M [subscript age] = 4;2) experience a standardized laboratory event and discussed the event with their child later that day. Children's memory for this event was subsequently tested at two delay intervals. Prior to the laboratory event, parents were randomly assigned to receive either autonomy-support…

Parents of Children with Autism Spectrum Disorders Have Merited Concerns about Their Later-Born Infants

Science.gov (United States)

McMahon, Caitlin R.; Malesa, Elizabeth E.; Yoder, Paul J.; Stone, Wendy L.

2007-01-01

Infant siblings of children with autism spectrum disorders (ASD) are at elevated risk for social, cognitive, and language delays which may cause parents to become hypervigilant (i.e., excessively worried) about their infant's development. The extent to which parental concern is related to actual cognitive or language impairment in these infants is…

Modeling delay in genetic networks: from delay birth-death processes to delay stochastic differential equations.

Science.gov (United States)

Gupta, Chinmaya; López, José Manuel; Azencott, Robert; Bennett, Matthew R; Josić, Krešimir; Ott, William

2014-05-28

Delay is an important and ubiquitous aspect of many biochemical processes. For example, delay plays a central role in the dynamics of genetic regulatory networks as it stems from the sequential assembly of first mRNA and then protein. Genetic regulatory networks are therefore frequently modeled as stochastic birth-death processes with delay. Here, we examine the relationship between delay birth-death processes and their appropriate approximating delay chemical Langevin equations. We prove a quantitative bound on the error between the pathwise realizations of these two processes. Our results hold for both fixed delay and distributed delay. Simulations demonstrate that the delay chemical Langevin approximation is accurate even at moderate system sizes. It captures dynamical features such as the oscillatory behavior in negative feedback circuits, cross-correlations between nodes in a network, and spatial and temporal information in two commonly studied motifs of metastability in biochemical systems. Overall, these results provide a foundation for using delay stochastic differential equations to approximate the dynamics of birth-death processes with delay.

Modeling delay in genetic networks: From delay birth-death processes to delay stochastic differential equations

Energy Technology Data Exchange (ETDEWEB)

Gupta, Chinmaya; López, José Manuel; Azencott, Robert; Ott, William [Department of Mathematics, University of Houston, Houston, Texas 77004 (United States); Bennett, Matthew R. [Department of Biochemistry and Cell Biology, Rice University, Houston, Texas 77204, USA and Institute of Biosciences and Bioengineering, Rice University, Houston, Texas 77005 (United States); Josić, Krešimir [Department of Mathematics, University of Houston, Houston, Texas 77004 (United States); Department of Biology and Biochemistry, University of Houston, Houston, Texas 77204 (United States)

2014-05-28

Delay is an important and ubiquitous aspect of many biochemical processes. For example, delay plays a central role in the dynamics of genetic regulatory networks as it stems from the sequential assembly of first mRNA and then protein. Genetic regulatory networks are therefore frequently modeled as stochastic birth-death processes with delay. Here, we examine the relationship between delay birth-death processes and their appropriate approximating delay chemical Langevin equations. We prove a quantitative bound on the error between the pathwise realizations of these two processes. Our results hold for both fixed delay and distributed delay. Simulations demonstrate that the delay chemical Langevin approximation is accurate even at moderate system sizes. It captures dynamical features such as the oscillatory behavior in negative feedback circuits, cross-correlations between nodes in a network, and spatial and temporal information in two commonly studied motifs of metastability in biochemical systems. Overall, these results provide a foundation for using delay stochastic differential equations to approximate the dynamics of birth-death processes with delay.

Modeling delay in genetic networks: From delay birth-death processes to delay stochastic differential equations

International Nuclear Information System (INIS)

Gupta, Chinmaya; López, José Manuel; Azencott, Robert; Ott, William; Bennett, Matthew R.; Josić, Krešimir

2014-01-01

Delay is an important and ubiquitous aspect of many biochemical processes. For example, delay plays a central role in the dynamics of genetic regulatory networks as it stems from the sequential assembly of first mRNA and then protein. Genetic regulatory networks are therefore frequently modeled as stochastic birth-death processes with delay. Here, we examine the relationship between delay birth-death processes and their appropriate approximating delay chemical Langevin equations. We prove a quantitative bound on the error between the pathwise realizations of these two processes. Our results hold for both fixed delay and distributed delay. Simulations demonstrate that the delay chemical Langevin approximation is accurate even at moderate system sizes. It captures dynamical features such as the oscillatory behavior in negative feedback circuits, cross-correlations between nodes in a network, and spatial and temporal information in two commonly studied motifs of metastability in biochemical systems. Overall, these results provide a foundation for using delay stochastic differential equations to approximate the dynamics of birth-death processes with delay

Social Cultivation of Vaccine Refusal and Delay among Waldorf (Steiner) School Parents.

Science.gov (United States)

Sobo, Elisa J

2015-09-01

U.S. media reports suggest that vastly disproportionate numbers of un- and under-vaccinated children attend Waldorf (private alternative) schools. After confirming this statistically, I analyzed qualitative and quantitative vaccination-related data provided by parents from a well-established U.S. Waldorf school. In Europe, Waldorf-related non-vaccination is associated with anthroposophy (a worldview foundational to Waldorf education)—but that was not the case here. Nor was simple ignorance to blame: Parents were highly educated and dedicated to self-education regarding child health. They saw vaccination as variously unnecessary, toxic, developmentally inappropriate, and profit driven. Some vaccine caution likely predated matriculation, but notable post-enrollment refusal increases provided evidence of the socially cultivated nature of vaccine refusal in the Waldorf school setting. Vaccine caution was nourished and intensified by an institutionalized emphasis on alternative information and by school community norms lauding vaccine refusal and masking uptake. Implications for intervention are explored. © 2015 by the American Anthropological Association.

Improvement of uniformity of the negative ion beams by tent-shaped magnetic field in the JT-60 negative ion source

International Nuclear Information System (INIS)

Yoshida, Masafumi; Hanada, Masaya; Kojima, Atsushi; Kashiwagi, Mieko; Akino, Noboru; Endo, Yasuei; Komata, Masao; Mogaki, Kazuhiko; Nemoto, Shuji; Ohzeki, Masahiro; Seki, Norikazu; Sasaki, Shunichi; Shimizu, Tatsuo; Terunuma, Yuto; Grisham, Larry R.

2014-01-01

Non-uniformity of the negative ion beams in the JT-60 negative ion source with the world-largest ion extraction area was improved by modifying the magnetic filter in the source from the plasma grid (PG) filter to a tent-shaped filter. The magnetic design via electron trajectory calculation showed that the tent-shaped filter was expected to suppress the localization of the primary electrons emitted from the filaments and created uniform plasma with positive ions and atoms of the parent particles for the negative ions. By modifying the magnetic filter to the tent-shaped filter, the uniformity defined as the deviation from the averaged beam intensity was reduced from 14% of the PG filter to ∼10% without a reduction of the negative ion production

Father's Migration and Leaving the Parental Home in Rural Mozambique

Science.gov (United States)

Chae, Sophia; Hayford, Sarah R.; Agadjanian, Victor

2016-01-01

Migration is an increasingly common demographic phenomenon and has important implications for the well-being of family members left behind. Although extensive research has examined the impact of parental labor migration on school-age children, less is known about its effect on adolescents. In this study, the authors used longitudinal survey data collected in rural Mozambique (N = 515) to assess the association between father's migration and adolescent children's leaving the parental home, an important component of the transition to adulthood. The results showed that father's migration delays home-leaving for adolescent girls and that these effects are not mediated by school enrollment. The results for boys were inconclusive. The authors also found that remittances and longer durations of paternal migration were negatively associated with the transition out of the home. On the basis of the findings, they argue that father's migration delays girls’ marriage. PMID:27499554

Working with the Bilingual Child Who Has a Language Delay. Meeting Learning Challenges

Science.gov (United States)

Greenspan, Stanley I.

2005-01-01

It is very important to determine if a bilingual child's language delay is simply in English or also in the child's native language. Understandably, many children have higher levels of language development in the language spoken at home. To discover if this is the case, observe the child talking with his parents. Sometimes, even without…

Charge transfer processes during ion scattering and stimulated desorption of secondary ions from gas-condensed dielectric surfaces

CERN Document Server

Souda, R

2002-01-01

The ion emission mechanism from weakly-interacting solid surfaces has been investigated. The H sup + ion captures a valence electron via transient chemisorption, so that the ion neutralization probability is related to the nature of bonding of adsorbates. The H sup + ion is scattered from physisorbed Ar at any coverage whereas the H sup + yield from solid H sub 2 O decays considerably due to covalency in the hydrogen bond. In electron- and ion-stimulated desorption, the ion ejection probability is correlated intimately with the physisorption/chemisorption of parent atoms or molecules. The emission of F sup + ions is rather exceptional because they arise from the screened F 2s core-hole state followed by the ionization via the intra-atomic Auger decay after bond breakage. In electron-stimulated desorption of H sub 2 O, hydrated protons are emitted effectively from nanoclusters formed on a solid Ar substrate due to Coulomb repulsion between confined valence holes.

Parental professional help-seeking for infant sleep.

Science.gov (United States)

Hsu, Pei-Wen; Wu, Wei-Wen; Tung, Yi-Ching; Thomas, Karen A; Tsai, Shao-Yu

2017-12-01

To explore the perceptions and experiences of parental professional help-seeking for infant sleep and sleep-related concerns. Infant sleep is a frequent concern for parents. However, very little is known about the reasons parents seek, do not seek or delay seeking professional attention about their concerns related to infant sleep. A qualitative study design was used. Twenty audio-taped interviews with parents of healthy 12-month-old infants were conducted at a university-affiliated hospital or parents' homes depending on where parents felt more comfortable discussing their personal views and medical help-seeking experiences. Thematic content analysis was performed to determine specific patterns and similarities within and between interview data. Three main themes developed from the interviews were as follows: (i) uncertainty about infant sleep; (ii) I can handle infant sleep; and (iii) I am not satisfied with the professional services provided for infant sleep. Overall, parents knew little about or misunderstood infant sleep behaviours. Lack of proper information and knowledge about infant sleep influenced parents' motivation for professional help-seeking and help-receiving. Parents who have consulted a healthcare professional but received unsatisfactory responses, such as an ambivalent attitude or insufficient assessment, reported being less motivated or unwilling to seek medical help again. Our study demonstrates the complexity of parental professional help-seeking and receiving for infant sleep. Findings suggest that parents perceive a wide range of barriers that influence the likelihood that they will seek professional advice for infant sleep. Reducing knowledge barriers and providing adequate attention at all well-infant visits would facilitate parental use of healthcare services to manage problematic infant sleep behaviours. © 2017 John Wiley & Sons Ltd.

Cognitive Development of Toddlers: Does Parental Stimulation Matter?

Science.gov (United States)

Malhi, Prahbhjot; Menon, Jagadeesh; Bharti, Bhavneet; Sidhu, Manjit

2018-02-01

To examine the impact of quality of early stimulation on cognitive functioning of toddlers living in a developing country. The developmental functioning of 150 toddlers in the age range of 12-30 mo (53% boys; Mean = 1.76 y, SD = 0.48) was assessed by the mental developmental index of the Developmental Assessment Scale for Indian Infants (DASII). The StimQ questionnaire- toddler version was used to measure cognitive stimulation at home. The questionnaire consists of four subscales including availability of learning materials (ALM), reading activities (READ), parent involvement in developmental activities (PIDA), and parent verbal responsivity (PVR). Multivariate regression analysis was used to predict cognitive scores using demographic (age of child), socio-economic status (SES) (income, parental education), and home environment (subscale scores of StimQ) as independent variables. Mean Mental Development Index (MDI) score was 91.5 (SD = 13.41), nearly one-fifth (17.3%) of the toddlers had MDI scores less than 80 (cognitive delay). Children with cognitive delay, relative to typically developing (TD, MDI score ≥ 80) cohort of toddlers, had significantly lower scores on all the subscales of StimQ and the total StimQ score. Despite the overall paucity of learning materials available to toddlers, typical developing toddlers were significantly more likely to have access to symbolic toys (P = 0.004), art materials (P = 0.032), adaptive/fine motor toys (P = 0.018), and life size toys (P = 0.036). Multivariate regression analysis results indicated that controlling for confounding socio-economic status variables, higher parental involvement in developmental activities (PIDA score) and higher parental verbal responsivity (PVR score) emerged as significant predictors of higher MDI scores and explained 34% of variance in MDI scores (F = 23.66, P = 0.001). Disparities in child development emerge fairly early and these differences are not

Addressing Parental Vaccine Concerns: Engagement, Balance, and Timing.

Directory of Open Access Journals (Sweden)

Jason M Glanz

2015-08-01

Full Text Available The recent United States measles epidemic has sparked another contentious national discussion about childhood vaccination. A growing number of parents are expressing concerns about the safety of vaccines, often fueled by misinformation from the internet, books, and other nonmedical sources. Many of these concerned parents are choosing to refuse or delay childhood vaccines, placing their children and surrounding communities at risk for serious diseases that are nearly 100% preventable with vaccination. Between 10% and 15% of parents are asking physicians to space out the timing of vaccines, which often poses an ethical dilemma for physicians. This trend reflects a tension between personal liberty and public health, as parents fight to control the decisions that affect the health of their children and public health officials strive to maintain high immunization rates to prevent outbreaks of vaccine-preventable diseases. Interventions to address this emerging public health issue are needed. We describe a framework by which web-based interventions can be used to help parents make evidence-based decisions about childhood vaccinations.

Age of licensure and monitoring teenagers' driving: survey of parents of novice teenage drivers.

Science.gov (United States)

McCartt, Anne T; Hellinga, Laurie A; Haire, Emily R

2007-01-01

To assess parental decision making regarding the timing of teenagers initiating driving and monitoring teenagers' driving after licensure. About 300 parents were interviewed during spring 2006 in Minnesota, North Carolina, and Rhode Island, states with varying licensing provisions, while teenagers took their first on-road driving tests. States' differences in ages of obtaining learner's permits and licenses reflected different licensing laws, but most teenagers obtained permits and took road tests within the first few months after they became eligible. Common reasons for delaying obtaining permits were fulfilling driver education requirements and lack of readiness/immaturity. Insufficient practice driving most often delayed licensure. Among the parents interviewed, 33-49% believed the minimum licensure age should be 17 or older. Almost all parents planned to supervise teenagers' driving after licensure, and most wanted to know about speeding or distractions. When asked about in-vehicle devices to monitor teenagers' driving, 37-59% of parents had heard of them. Parents were least interested in using video cameras and about equally interested in computer chips and cell-phone-based GPS systems. Disinterest in monitoring devices most often was attributed to trusting teenagers or respecting their privacy. Licensing laws influence ages of initiating driving. Although many parents support licensing at 17 or older - higher than in all but one state - most teenagers initiate driving soon after reaching the minimum age. Parents plan to supervise teenagers' driving, and many say they are open to using in-vehicle monitoring devices. Many parents support a minimum licensing age of 17 or older and would consider in-vehicle devices to extend their supervision of teenager's driving.

Delayed neutrons in liquid metal spallation targets

International Nuclear Information System (INIS)

Ridikas, D.; Bokov, P.; David, J.C.; Dore, D.; Giacri, M.L.; Van Lauwe, A.; Plukiene, R.; Plukis, A.; Ignatiev, S.; Pankratov, D.

2003-01-01

The next generation spallation neutron sources, neutrino factories or RIB production facilities currently being designed and constructed around the world will increase the average proton beam power on target by a few orders of magnitude. Increased proton beam power results in target thermal hydraulic issues leading to new target designs, very often based on flowing liquid metal targets such as Hg, Pb, Pb-Bi. Radioactive nuclides produced in liquid metal targets are transported into hot cells, past electronics, into pumps with radiation sensitive components, etc. Besides the considerable amount of photon activity in the irradiated liquid metal, a significant amount of the delayed neutron precursor activity can be accumulated in the target fluid. The transit time from the front of a liquid metal target into areas, where delayed neutrons may be important, can be as short as a few seconds, well within one half-life of many delayed neutron precursors. Therefore, it is necessary to evaluate the total neutron flux (including delayed neutrons) as a function of time and determine if delayed neutrons contribute significantly to the dose rate. In this study the multi-particle transport code MCNPX combined with the material evolution program CINDER'90 will be used to evaluate the delayed neutron flux and spectra. The following scientific issues will be addressed in this paper: - Modeling of a typical geometry of the liquid metal spallation target; - Predictions of the prompt neutron fluxes, fission fragment and spallation product distributions; - Comparison of the above parameters with existing experimental data; - Time-dependent calculations of delayed neutron precursors; - Neutron flux estimates due to the prompt and delayed neutron emission; - Proposal of an experimental program to measure delayed neutron spectra from high energy spallation-fission reactions. The results of this study should be directly applicable in the design study of the European MegaPie (1 MW

Factors Influencing Institutional-Based Pediatric Rehabilitation Services among Caregivers of Children with Developmental Delay in Southwestern Rajasthan.

Science.gov (United States)

Mishra, Kriti; Siddharth, V

2018-01-01

A limited number of caregivers of children with developmental delay access rehabilitation facilities in India. The study explored utilization of rehabilitation services at a tertiary care setup in southwestern Rajasthan and various factors influencing it. The aim of this study is to explore rehabilitation service utilization among children with developmental delay at a tertiary care setup and to ascertain factors that influence this pattern. This study was conducted at the department of physical medicine and rehabilitation at tertiary care setup. This was an observational study. Children with developmental delay who were advised institutional-based rehabilitation were identified over span of 1 year. Those who failed to return for rehabilitation after the first visit were interviewed telephonically. The interview had semi-structured open-ended questions about their reasons for inability to avail services. SPSS statistics 22 was used for descriptive analysis and correlation of variables. Of 230 children with developmental delay visiting department in 1-year duration, 48 took regular rehabilitation. Parents of 129 children with complete records were asked regarding discontinuation. Factors cited by majority were long distance from institute and service at hospital. Other reasons for discontinuation were related to belief system, family issues, time issues, socioeconomic factors, etc. Socioeconomic status was significantly associated with parental education (C = 0.488, P = 0.000) and financial issues. Location of family had significant association with long distance (C = 0.315, P = 0.000), parental education (C = 0.251, P = 0.003), and belief system (C = 0.265, P = 0.002). Distance from institute and quality of hospital service determined rehabilitation service use at a tertiary institute. Other factors such as socioeconomic status, family support, and social belief system must also be addressed while delivering institutional rehabilitation to children.

Factors influencing institutional-based pediatric rehabilitation services among caregivers of children with developmental delay in Southwestern Rajasthan

Directory of Open Access Journals (Sweden)

Kriti Mishra

2018-01-01

Full Text Available Context: A limited number of caregivers of children with developmental delay access rehabilitation facilities in India. The study explored utilization of rehabilitation services at a tertiary care setup in southwestern Rajasthan and various factors influencing it. Aims: The aim of this study is to explore rehabilitation service utilization among children with developmental delay at a tertiary care setup and to ascertain factors that influence this pattern. Settings: This study was conducted at the department of physical medicine and rehabilitation at tertiary care setup. Design: This was an observational study. Subjects and Methods: Children with developmental delay who were advised institutional-based rehabilitation were identified over span of 1 year. Those who failed to return for rehabilitation after the first visit were interviewed telephonically. The interview had semi-structured open-ended questions about their reasons for inability to avail services. Statistical Analysis: SPSS statistics 22 was used for descriptive analysis and correlation of variables. Results: Of 230 children with developmental delay visiting department in 1-year duration, 48 took regular rehabilitation. Parents of 129 children with complete records were asked regarding discontinuation. Factors cited by majority were long distance from institute and service at hospital. Other reasons for discontinuation were related to belief system, family issues, time issues, socioeconomic factors, etc. Socioeconomic status was significantly associated with parental education (C = 0.488, P = 0.000 and financial issues. Location of family had significant association with long distance (C = 0.315, P = 0.000, parental education (C = 0.251, P = 0.003, and belief system (C = 0.265, P = 0.002. Conclusions: Distance from institute and quality of hospital service determined rehabilitation service use at a tertiary institute. Other factors such as socioeconomic status, family support, and

Binding energies of cluster ions

International Nuclear Information System (INIS)

Parajuli, R.; Matt, S.; Scheier, P.; Echt, O.; Stamatovic, A.; Maerk, T.D.

2002-01-01

The binding energy of charged clusters may be measured by analyzing the kinetic energy released in the metastable decay of mass selected parent ions. Using finite heat bath theory to determine the binding energies of argon, neon, krypton, oxygen and nitrogen from their respective average kinetic energy released were carried out. A high-resolution double focussing two-sector mass spectrometer of reversed Nier-Johnson type geometry was used. MIKE ( mass-analysed ion kinetic energy) were measured to investigate decay reactions of mass-selected ions. For the inert gases neon (Ne n + ), argon (Ar n + ) and krypton (Kr n + ), it is found that the binding energies initially decrease with increasing size n and then level off at a value above the enthalpy of vaporization of the condensed phase. Oxygen cluster ions shown a characteristic dependence on cluster size (U-shape) indicating a change in the metastable fragmentation mechanism when going from the dimer to the decamer ion. (nevyjel)

Examining Parent Perceptions Regarding the Use of Augmentative and Alternative Communication Interventions for Children with Autism Spectrum Disorder

Science.gov (United States)

Jones, Felita

2017-01-01

Purpose. This quantitative study examined parent perceptions regarding augmentative and alternative communication (AAC) interventions for their children with autism to determine if, according to parent perceptions, a relationship existed between AAC and functional communication. Those faced with cognitive and developmental delays like autism face…

Autism and Bilingualism: A Qualitative Interview Study of Parents' Perspectives and Experiences.

Science.gov (United States)

Hampton, Sarah; Rabagliati, Hugh; Sorace, Antonella; Fletcher-Watson, Sue

2017-02-01

Research into how bilingual parents of children with autism spectrum disorder (ASD) make choices about their children's language environment is scarce. This study aimed to explore this issue, focusing on understanding how bilingual parents of children with ASD may make different language exposure choices compared with bilingual parents of children without ASD. Semistructured qualitative interviews were conducted with 17 bilingual parents with a child with ASD and 18 bilingual parents with a typically developing (TD) child. Thematic analysis revealed that, in contrast to parents of TD children, parents with a child with ASD expressed concerns that a bilingual environment would cause confusion for their child and exacerbate language delays. This was particularly common for parents of children with lower verbal ability. Parents also identified potential benefits of bilingualism, particularly in terms of maintaining a close and affectionate bond with their child. Parents of children with ASD have concerns about bilingualism not present for parents of TD children, and these concerns are greater for parents of children with lower verbal ability. Future research in this area should take into account factors such as parent-child bonds as well as communication and language development.

Comparative effects of 60Co γ-rays and neon and helium ions on cycle duration and division probability of EMT 6 cells. A time-lapse cinematography study

International Nuclear Information System (INIS)

Collyn-d'Hooghe, M.; Hemon, D.; Gilet, R.

1981-01-01

Exponentially growing cultures of EMT 6 cells were irradiated in vitro with neon ions, helium ions or 60 Co γ-rays. Time-lapse cinematography allowed the determination, for individual cells, of cycle duration, success of the mitotic division and the age of the cell at the moment of irradiation. Irradiation induced a significant mitotic delay increasing proportionally with the delivered dose. Using mitotic delay as an endpoint, the r.b.e. for neon ions with respect to 60 Co γ-rays was 3.3 +- 0.2 while for helium ions it was 1.2 +- 0.1. Mitotic delay was greatest in those cells that had progressed furthest in their cycle at the time of irradiation. No significant mitotic delay was observed in the post-irradiation generation. Division probability was significantly reduced by irradiation both in the irradiated and in the post-irradiated generation. The reduction in division probability obtained with 3 Gy of neon ions was similar to that obtained after irradiation with 6 Gy of helium ions or 60 Co γ-rays. (author)

Comparative effects of 60Co gamma-rays and neon and helium ions on cycle duration and division probability of EMT 6 cells. A time-lapse cinematography study.

Science.gov (United States)

Collyn-d'Hooghe, M; Hemon, D; Gilet, R; Curtis, S B; Valleron, A J; Malaise, E P

1981-03-01

Exponentially growing cultures of EMT 6 cells were irradiated in vitro with neon ions, helium ions or 60Co gamma-rays. Time-lapse cinematography allowed the determination, for individual cells, of cycle duration, success of the mitotic division and the age of the cell at the moment of irradiation. Irradiation induced a significant mitotic delay increasing proportionally with the delivered dose. Using mitotic delay as an endpoint, the r.b.e. for neon ions with respect to 60Co gamma-rays was 3.3 +/- 0.2 while for helium ions it was 1.2 +/- 0.1. Mitotic delay was greatest in those cells that had progressed furthest in their cycle at the time of irradiation. No significant mitotic delay was observed in the post-irradiation generation. Division probability was significantly reduced by irradiation both in the irradiated and in the post-irradiated generation. The reduction in division probability obtained with 3 Gy of neon ions was similar to that obtained after irradiation with 6 Gy of helium ions or 60Co gamma-rays.

Parent Training with High-Risk Immigrant Chinese Families: A Pilot Group Randomized Trial Yielding Practice-Based Evidence

Science.gov (United States)

Lau, Anna S.; Fung, Joey J.; Ho, Lorinda Y.; Liu, Lisa L.; Gudino, Omar G.

2011-01-01

We studied the efficacy and implementation outcomes of a culturally responsive parent training (PT) program. Fifty-four Chinese American parents participated in a wait-list controlled group randomized trial (32 immediate treatment, 22 delayed treatment) of a 14-week intervention designed to address the needs of high-risk immigrant families.…

Comparison of the reliability of parental reporting and the direct test of the Thai Speech and Language Test.

Science.gov (United States)

Prathanee, Benjamas; Angsupakorn, Nipa; Pumnum, Tawitree; Seepuaham, Cholada; Jaiyong, Pechcharat

2012-11-01

To find reliability of parental or caregiver's report and testing of the Thai Speech and Language Test for Children Aged 0-4 Years Old. Five investigators assessed speech and language abilities from video both contexts: parental or caregivers' report and test forms of Thai Speech and Language Test for Children Aged 0-4 Years Old. Twenty-five normal and 30 children with delayed development or risk for delayed speech and language skills were assessed at age intervals of 3, 6, 9, 12, 15, 18, 24, 30, 36 and 48 months. Reliability of parental or caregivers' testing and reporting was at a moderate level (0.41-0.60). Inter-rater reliability among investigators was excellent (0.86-1.00). The parental or caregivers' report form of the Thai Speech and Language test for Children aged 0-4 years old was an indicator for success at a moderate level. Trained professionals could use both forms of this test as reliable tools at an excellent level.

Vocabulary development at home: A multimedia elaborated picture supporting parent-toddler interaction

NARCIS (Netherlands)

Gremmen, M.C.; Molenaar, I.; Teepe, R.C.

2016-01-01

Some children enter elementary school with large vocabulary delays, which negatively influence their later school performance. A rich home language environment can support vocabulary development through frequent high-quality parent-toddler interaction. Elaborated picture home activities can support

Approximation of the characteristics of ion drift in parent gas

Energy Technology Data Exchange (ETDEWEB)

Golyatina, R. I.; Maiorov, S. A., E-mail: mayorov-sa@mail.ru [Russian Academy of Science, Prokhorov General Physics Institute (Russian Federation)

2017-01-15

The drift velocities of noble-gas and mercury ions in a constant homogeneous electric field are calculated using Monte Carlo simulations. The ion mobility is analyzed as a function of the field strength and gas temperature. The fitting parameters for calculating the drift velocity by the Frost formula at gas temperatures of 4.2, 77, 300, 1000, and 2000 K are obtained. A general approximate formula for the drift velocity as a function of the reduced field and gas temperature is derived.

Exiting and Returning to the Parental Home for Boomerang Kids.

Science.gov (United States)

Sandberg-Thoma, Sara E; Snyder, Anastasia R; Jang, Bohyun Joy

2015-06-01

Young adults commonly exit from and return to the parental home, yet few studies have examined the motivation behind these exits and returns using a life course framework. Using data from the National Longitudinal Survey of Youth 1997, the authors examined associations between mental health problems and economic characteristics and exits from (n = 8,162), and returns to (n = 6,530), the parental home during the transition to adulthood. The average age of the respondents was 24 years. The authors found evidence that mental health and economic characteristics were related to home leaving and returning. Emotional distress was associated with earlier exits from, and returns to, the parental home; alcohol problems were associated with earlier returns to the parental home. The findings regarding economic resources were unexpectedly mixed. Greater economic resources were linked to delayed exits from, and earlier returns to, the parental home. The implications of these findings for young adults are discussed.

Paternal versus maternal coping styles with child diagnosis of developmental delay.

Science.gov (United States)

Barak-Levy, Yael; Atzaba-Poria, Na'ama

2013-06-01

Parents of children with disabilities vary in their reaction to their children's diagnosis. The current study focused on fathers in addition to mothers and examined their resolution and coping styles when having children diagnosed with developmental delay (DD). Sixty-five fathers and 71 mothers were interviewed using the reaction to the diagnosis interview (RDI; Pianta & Marvin, 1992a). Results indicated that the majority of parents were unresolved with their child's diagnosis, with no differences found between fathers' and mothers' rates of resolution. Furthermore, both parents of children that were diagnosed at a later age and parents that were less educated tended to be unresolved, as did fathers of a lower socioeconomic status. Older age of both children and mothers was related to maternal lack of resolution. Finally, an in-depth examination revealed significant differences in the manner in which fathers and mothers cope with their children's diagnosis: whereas mothers were more prone to using an emotional coping style, fathers tended to use a cognitive coping style. The clinical implications of paternal versus maternal coping styles are discussed. Copyright © 2013 Elsevier Ltd. All rights reserved.

Optimal Joint Expected Delay Forwarding in Delay Tolerant Networks

OpenAIRE

Jia Xu; Xin Feng; Wen Jun Yang; Ru Chuan Wang; Bing Qing Han

2013-01-01

Multicopy forwarding schemes have been employed in delay tolerant network (DTN) to improve the delivery delay and delivery rate. Much effort has been focused on reducing the routing cost while retaining high performance. This paper aims to provide an optimal joint expected delay forwarding (OJEDF) protocol which minimizes the expected delay while satisfying a certain constant on the number of forwardings per message. We propose a comprehensive forwarding metric called joint expected delay (JE...

The Impact of Short-Term Video Games on Performance among Children with Developmental Delays: A Randomized Controlled Trial.

Directory of Open Access Journals (Sweden)

Ru-Lan Hsieh

Full Text Available This prospective, randomized controlled study investigated the effects of short-term interactive video game playing among children with developmental delays participating in traditional rehabilitation treatment at a rehabilitation clinic. One hundred and one boys and 46 girls with a mean age of 5.8 years (range: 3 to 12 years were enrolled in this study. All patients were confirmed to suffer from developmental delays, and were participating in traditional rehabilitation treatment. Children participated in two periods of 4 weeks each, group A being offered intervention of eight 30-minute sessions of interactive video games in the first period, and group B in the second, in addition to the traditional rehabilitation treatment. The physical, psychosocial, and total health of the children was periodically assessed using the parent-reported Pediatric Quality of Life Inventory-Generic Core Scales (PedsQL; and the children's upper extremity and physical function, transfer and basic mobility, sports and physical functioning, and global functioning were assessed using the Pediatric Outcomes Data Collection Instrument. Parental impact was evaluated using the PedsQL-Family Impact Module for family function, PedsQL-Health Satisfaction questionnaire for parents' satisfaction with their children's care and World Health Organization-Quality of Life-Brief Version for quality of life. Compared with the baseline, significant improvements of physical function were observed in both groups (5.6 ± 19.5, p = 0.013; 4.7 ± 13.8, p = 0.009 during the intervention periods. No significant improvement of psychosocial health, functional performance, or family impact was observed in children with developmental delays. Short-term interactive video game play in conjunction with traditional rehabilitation treatment improved the physical health of children with developmental delays.ClinicalTrials.gov NCT02184715.

The Impact of Short-Term Video Games on Performance among Children with Developmental Delays: A Randomized Controlled Trial.

Science.gov (United States)

Hsieh, Ru-Lan; Lee, Wen-Chung; Lin, Jui-Hsiang

2016-01-01

This prospective, randomized controlled study investigated the effects of short-term interactive video game playing among children with developmental delays participating in traditional rehabilitation treatment at a rehabilitation clinic. One hundred and one boys and 46 girls with a mean age of 5.8 years (range: 3 to 12 years) were enrolled in this study. All patients were confirmed to suffer from developmental delays, and were participating in traditional rehabilitation treatment. Children participated in two periods of 4 weeks each, group A being offered intervention of eight 30-minute sessions of interactive video games in the first period, and group B in the second, in addition to the traditional rehabilitation treatment. The physical, psychosocial, and total health of the children was periodically assessed using the parent-reported Pediatric Quality of Life Inventory-Generic Core Scales (PedsQL); and the children's upper extremity and physical function, transfer and basic mobility, sports and physical functioning, and global functioning were assessed using the Pediatric Outcomes Data Collection Instrument. Parental impact was evaluated using the PedsQL-Family Impact Module for family function, PedsQL-Health Satisfaction questionnaire for parents' satisfaction with their children's care and World Health Organization-Quality of Life-Brief Version for quality of life. Compared with the baseline, significant improvements of physical function were observed in both groups (5.6 ± 19.5, p = 0.013; 4.7 ± 13.8, p = 0.009) during the intervention periods. No significant improvement of psychosocial health, functional performance, or family impact was observed in children with developmental delays. Short-term interactive video game play in conjunction with traditional rehabilitation treatment improved the physical health of children with developmental delays. ClinicalTrials.gov NCT02184715.

Heavy ions as probes of nuclei far from stability

International Nuclear Information System (INIS)

Moltz, D.M.; Nitschke, J.M.; Wilmarth, P.A.; Toth, K.S.

1989-01-01

Nuclei located far from stability provide us with an opportunity for studying nuclear matter existing under unusual conditions. In these regions of instability, radioactive decay becomes the predominant technique by which one can obtain structure information. We have been involved in the investigation of nuclear properties of nuclei close to the proton drip line. In our explorations we have utilized heavy-ion fusion, followed by particle evaporation, to produce the extremely neutron-deficient nuclei of interest. In our studies, single-particle states near the 82-neutron shell, populated in the β decay of short-lived nuclides, have been examined and their excitation energies determined. Numerous new isotopes, isomers, and β-delayed-proton and α-particle emitters have been discovered. This contribution will discuss our particle-decay investigations. These decay modes provide us with a convenient means of discovering new isotopes whose identification opens the way for further, more extensive explorations. Also, particle-decay energies in many instances can be used to determine mass differences between parent and daughter ground states. Such measurements are therefore used to test mass formulae and to obtain estimates of masses for proton rich nuclei. 19 refs., 13 figs

Standardized education and parental awareness are lacking for testicular torsion.

Science.gov (United States)

Friedman, Ariella A; Ahmed, Haris; Gitlin, Jordan S; Palmer, Lane S

2016-06-01

Testicular torsion leads to orchiectomy in 30-50% of cases, which may cause psychological upset and parental guilt over a potentially avertable outcome. Presentation delay is an important modifiable cause of orchiectomy; yet, families are not routinely educated about torsion or its urgency. The present study assessed parental knowledge regarding acute scrotal pain. An anonymous survey was distributed to parents in Urology and ENT offices, asking about their children's gender and scrotal pain history, urgency of response to a child's acute scrotal pain, and familiarity with testicular torsion. Surveys of 479 urology and 59 ENT parents were analyzed. The results between the two were not statistically different. Among the urology parents, 34% had heard of testicular twisting/torsion, most commonly through friends, relatives or knowing someone with torsion (35%); only 17% were informed by pediatricians (Summary Figure). Parents presenting for a child's scrotal pain were significantly more likely to have heard of torsion (69%) than those presenting for other reasons (30%, OR 5.24, P parents of boys had spoken with their children about torsion. Roughly three quarters of them would seek emergent medical attention - by day (75%) or night (82%) - for acute scrotal pain. However, urgency was no more likely among those who knew about torsion. This was the first study to assess parental knowledge of the emergent nature of acute scrotal pain in a non-urgent setting, and most closely approximating their level of knowledge at the time of pain onset. It also assessed parents' hypothetical responses to the scenario, which was markedly different than documented presentation times, highlighting a potential area for improvement in presentation times. Potential limitations included lack of respondent demographic data, potential sampling bias of a population with greater healthcare knowledge or involvement, and assessment of parents only. Parental knowledge of testicular torsion was

Parenting behaviors, perceptions, and psychosocial risk: impacts on young children's development.

Science.gov (United States)

Glascoe, Frances Page; Leew, Shirley

2010-02-01

The goal of this study was to assess which parenting behaviors, perceptions, and risk factors were associated with optimal versus delayed development. A total of 382 families from the national Brigance Infant and Toddler Screens standardization and validation study participated. Data sources included parent questionnaires, child testing, and examiner observations of parent-child interactions. Parenting styles research was operationalized with the Brigance Parent-Child Interactions Scale, a brief measure of parenting behaviors and perceptions. Six positive parenting behaviors and perceptions predicted average to above-average development on the Brigance screens. Conversely, parenting behaviors and negative perceptions of children indicated child performance nearly 2 SDs below the mean on Brigance screens. Psychosocial risk factors associated with fewer positive parenting behaviors and with negative perceptions included >3 children in the home, multiple moves, limited English, and parental depression. A dearth of positive parenting behaviors plus negative perceptions of children, with or without psychosocial risk factors, negatively affect child development, which is apparent as early as 6 months of age. The older the child is, the greater the performance gaps are. Language development is particularly at risk when parenting is problematic. Findings underscore the importance of early development promotion with parents, focusing on their talking, playing, and reading with children, and the need for interventions regarding psychosocial risk factors.

Evaluation of copper ion of antibacterial effect on Pseudomonas aeruginosa, Salmonella typhimurium and Helicobacter pylori and optical, mechanical properties

Energy Technology Data Exchange (ETDEWEB)

Kim, Young-Hwan [School of Materials Science and Engineering, University of Yonsei, Seoul (Korea, Republic of); Choi, Yu-ri; Kim, Kwang-Mahn [Department and Research Institute of Dental Biomaterials and Bioengineering, College of Dentistry, University of Yonsei, Seoul (Korea, Republic of); Choi, Se-Young, E-mail: sychoi@yonsei.ac.kr [School of Materials Science and Engineering, University of Yonsei, Seoul (Korea, Republic of)

2012-02-01

Antibacterial effect on Pseudomonas aeruginosa, Salmonella typhimurium and Helicobacter pylori of copper ion was researched. Also, additional effects of copper ion coating on optical and mechanical properties were researched as well. Copper ion was coated on glass substrate as a thin film to prevent bacteria from growing. Cupric nitrate was used as precursors for copper ion. The copper ion contained sol was deposited by spin coating process on glass substrate. Then, the deposited substrates were heat treated at the temperature range between 200 Degree-Sign C and 250 Degree-Sign C. The thickness of deposited copper layer on the surface was 63 nm. The antibacterial effect of copper ion coated glass on P. aeruginosa, S. typhimurium and H. pylori demonstrated excellent effect compared with parent glass. Copper ion contained layer on glass showed a similar value of transmittance compared with value of parent glass. The 3-point bending strength and Vickers hardness were 209.2 MPa, 540.9 kg/mm{sup 2} which were about 1.5% and 1.3% higher than the value of parent glass. From these findings, it is clear that copper ion coating on glass substrate showed outstanding effect not only in antibacterial activity but also in optical and mechanical properties as well.

Fragmentation and reactivity of energy-selected ferrocenium ions

International Nuclear Information System (INIS)

Mestdagh, H.; Dutuit, O.; Heninger, M.; Thissen, R.; Alcaraz, C.

2002-01-01

In this study, results concerning the discussion of state-selected ferrocenium ions (c-C 5 H 5 ) 2 Fe + commonly called Cp 2 Fe + , as well as their reactions with methanol and ethanol are presented. Parent ions Cp 2 Fe + were produced by vacuumultraviolett (VUV) photoionization of neutral ferrocene using synchrotron radiation, and selected in internal energy by threshold photoelectron-photoion coincidences. The apparatus is divided into three differentially pumped regions: the source, the reaction and the detection zones. In source, state-selected parent ions are formed and can be selected in mass by a first quadrupole filter. State-selected ions are then injected in the second zone which is a RF octopole ion guide where reaction product ions are mass analyzed by a second quadrupole filter and detected by microchannelplates. In addition, the long flight time in the octopoles (several hundreds of microseconds) allows studying long-lived metastable ions. Total mass spectra were recorded at different photon energies, in addition to the main CpFe + and Fe + fragments, several minor fragments were detected such as C 10 H 10 + which reflects the formation of a C-C bond between the two Cp ligands. Losses of CH 3 , C 2 H 2 and C-4H 4 also indicate that important structure rearrangements take place before cleavage. The appearance energies of each mass-selected fragment ion were measured by recording fragment ion yields as a function of photon energy. Surprisingly, all fragments were found to have the same energy onset, i.e. 13.2 eV photon energy, except for C 3 H 3 Fe + (m/z 95). For Fe + ions, a sharp increase was observed at 17 eV, above the thermochemical onset of Fe + + 2 Cp. The 13.2 eV appearance energy of Fe + is thus assigned to the formation of Fe - + C 10 H 10 . The reactivity of ferrocenium ion with methanol and ethanol was investigated as a function of photon energy. While no reaction occurs at lower photon energies, several reaction products appear at 13.0 e

Factors associated with delayed tobacco uptake among Vietnamese/Asian and Arabic youth in Sydney, NSW.

Science.gov (United States)

Rissel, C; McLellan, L; Bauman, A

2000-02-01

To describe the smoking behaviour and possible reasons for delayed uptake of tobacco smoking among Arabic and Vietnamese/Asian speaking senior school students in Sydney A descriptive study involving four adult in-depth interviews and five student focus groups plus a quantitative survey of 2,573 school students attending Years 10 and 11 from 12 high schools with high Vietnamese and Arabic populations was conducted in Sydney in 1998. Self-reported smoking behaviour and peer, parent, school and cultural background information was collected. Students who smoke were more likely to have more than $20 a week pocket money, be from an English-speaking background, have no rules at home about smoking, have family members who smoke, not feel close to their father, spend three or more evenings a week out with friends, and have negative perceptions of the school environment and of the level of teacher support. They were less likely to smoke if they perceived their peers to be unsupportive. These results confirm the delayed uptake of smoking among students from a Vietnamese/Asian and Arabic-speaking backgrounds compared with those from an English-speaking background. A number of family and school factors were associated with smoking. Positive parental modelling, active parenting including awareness of or supervision of student leisure time, strict rules about not smoking and less pocket money are important strategies for preventing smoking among all adolescents.

FIER: Software for analytical modeling of delayed gamma-ray spectra

Science.gov (United States)

Matthews, E. F.; Goldblum, B. L.; Bernstein, L. A.; Quiter, B. J.; Brown, J. A.; Younes, W.; Burke, J. T.; Padgett, S. W.; Ressler, J. J.; Tonchev, A. P.

2018-05-01

A new software package, the Fission Induced Electromagnetic Response (FIER) code, has been developed to analytically predict delayed γ-ray spectra following fission. FIER uses evaluated nuclear data and solutions to the Bateman equations to calculate the time-dependent populations of fission products and their decay daughters resulting from irradiation of a fissionable isotope. These populations are then used in the calculation of γ-ray emission rates to obtain the corresponding delayed γ-ray spectra. FIER output was compared to experimental data obtained by irradiation of a 235U sample in the Godiva critical assembly. This investigation illuminated discrepancies in the input nuclear data libraries, showcasing the usefulness of FIER as a tool to address nuclear data deficiencies through comparison with experimental data. FIER provides traceability between γ-ray emissions and their contributing nuclear species, decay chains, and parent fission fragments, yielding a new capability for the nuclear science community.

Stability and delay sensitivity of neutral fractional-delay systems.

Science.gov (United States)

Xu, Qi; Shi, Min; Wang, Zaihua

2016-08-01

This paper generalizes the stability test method via integral estimation for integer-order neutral time-delay systems to neutral fractional-delay systems. The key step in stability test is the calculation of the number of unstable characteristic roots that is described by a definite integral over an interval from zero to a sufficient large upper limit. Algorithms for correctly estimating the upper limits of the integral are given in two concise ways, parameter dependent or independent. A special feature of the proposed method is that it judges the stability of fractional-delay systems simply by using rough integral estimation. Meanwhile, the paper shows that for some neutral fractional-delay systems, the stability is extremely sensitive to the change of time delays. Examples are given for demonstrating the proposed method as well as the delay sensitivity.

An inductively heated hot cavity catcher laser ion source

CERN Document Server

Reponen, M; Pohjalainen, I; Rothe, S; Savonen, M; Sonnenschein, V; Voss, A

2015-01-01

An inductively heated hot cavity catcher has been constructed for the production of low-energy ion beams of exotic, neutron-deficient Agisotopes. A proof-of-principle experiment has been realized by implanting primary 107Ag21+ ions from a heavy-ion cyclotron into a graphite catcher. A variable-thickness nickel foil was used to degrade the energy of the primary beam in order to mimic the implantation depth expected from the heavy-ion fusion-evaporation recoils of N = Z94Ag. Following implantation, the silver atoms diffused out of the graphite and effused into the catcher cavity and transfer tube, where they were resonantly laser ionized using a three-step excitation and ionization scheme. Following mass separation, the ions were identified by scanning the frequency of the first resonant excitation step while recording the ion count rate. Ion release time profiles were measured for different implantation depths and cavity temperatures with the mean delay time varying from 10 to 600 ms. In addition, the diffusio...

Communicating the benefits of combination vaccines to parents and health care providers.

Science.gov (United States)

Koslap-Petraco, Mary Beth; Parsons, Tamra

2003-01-01

Infants may receive as many as 5 separate injections at an office visit in order to comply with the 2002 childhood immunization schedule. Many parents and healthcare providers disagree with administering 4 or 5 injections at one visit, and therefore may delay some injections until another visit. This practice may lead to decreased compliance and can increase costs for the parent. New combination vaccines will help to simplify the immunization schedule, and health care providers will need to be able to address parental concerns regarding these vaccines. Nurses are often responsible for administering vaccines in the office setting, and therefore are also influential in deciding which vaccines should be ordered. The purpose of this article is to educate nurses on communicating the benefits of combination vaccines to parents and other healthcare providers.

The impact of parental social support on promoting children's ...

African Journals Online (AJOL)

The impact of parental social support on promoting children's physical activities. ... Log in or Register to get access to full text downloads. ... succe ss at school, while less attention was given to the child's involvement in the physical educat ion

Vocabulary Development at Home: A Multimedia Elaborated Picture Supporting Parent-Toddler Interaction

Science.gov (United States)

Gremmen, M. C.; Molenaar, I.; Teepe, R. C.

2016-01-01

Some children enter elementary school with large vocabulary delays, which negatively influence their later school performance. A rich home language environment can support vocabulary development through frequent high-quality parent-toddler interaction. Elaborated picture home activities can support this rich home language environment. This study…

Preliminary research results for parameter diagnostics of intense pulsed ion beams

International Nuclear Information System (INIS)

Yang Hailiang; Qiu Aici; Sun Jianfeng; He Xiaoping; Tang Junping; Wang Haiyang; Li Jingya; Ren Shuqing; Huang Jianjun; Zhang Jiasheng; Peng Jianchang; Ouyang Xiaoping; Zhang Guoguang; Li Hongyu

2004-01-01

The preliminary experimental results for parameter diagnostics of intense pulsed ion beams from the FLASH II accelerator were reported. The ion number of an intense pulsed ion beam were experimentally determined by monitoring delayed radioactivity from protons induced nuclear reactions in a 12 C target. The prompt γ-rays and diode Bremsstrahlung X-rays were measured with PIN semi-conductor detector and a ST401 plastic scintillator detector. The Bremsstrahlung distribution outside of the drift tube was detected with a thermoluminescent detector and the shielding design was also determined. The current densities of beam were measured with biased ion collector array. The ion beams were also recorded with a CR-39 detector. (author)

Race influences parent report of concerns about symptoms of autism spectrum disorder.

Science.gov (United States)

Donohue, Meghan Rose; Childs, Amber W; Richards, Megan; Robins, Diana L

2017-11-01

Racial differences in parent report of concerns about their child's development to healthcare providers may contribute to delayed autism spectrum disorder diagnoses in Black children. We tested the hypotheses that compared to White parents, Black parents of children with autism spectrum disorder would report fewer concerns about autism symptoms and would be more likely to report concerns about disruptive behaviors. A sample of 18- to 40-month-old toddlers ( N = 174) with autism spectrum disorder and their parent participated. After screening positive for autism spectrum disorder risk, but prior to a diagnostic evaluation, parents completed free-response questions soliciting concerns about their child's development. Parent responses were coded for the presence or the absence of 10 possible concerns, which were grouped into autism concerns (e.g. social and restricted and repetitive behavior concerns) or non-autism concerns (e.g. general developmental and disruptive behavior concerns). Compared to White parents, Black parents reported significantly fewer autism concerns and fewer social and restricted and repetitive behavior concerns. However, Black parents did not report significantly fewer non-autism concerns. Race did not influence parent report of disruptive behavior concerns. Lower reporting of autism concerns by Black parents may impact providers' abilities to identify children who need further screening or evaluation.

Parent-Based Sleep Education for Children with Autism Spectrum Disorders

Science.gov (United States)

Malow, Beth A.; Adkins, Karen W.; Reynolds, Ann; Weiss, Shelly K.; Loh, Alvin; Fawkes, Diane; Katz, Terry; Goldman, Suzanne E.; Madduri, Niru; Hundley, Rachel; Clemons, Traci

2014-01-01

This study provided sleep education to parents of children with autism spectrum disorder (ASD) to determine whether an individual or group format was more effective in improving sleep and aspects of daytime behavior and family functioning. Eighty children, ages 2-10 years, with ASD and sleep onset delay completed the study. Actigraphy and parent…

An Examination of Specific Child Behavior Problems as Predictors of Parenting Stress among Families of Children with Pervasive Developmental Disorders

Science.gov (United States)

Davis, Allyson L.; Neece, Cameron L.

2017-01-01

Introduction: Studies have shown that parents of children with pervasive developmental disorders (PDD) exhibit higher levels of stress than parents of typically developing children or children with other types of developmental delays (DD). This relationship appears to be mediated by elevated levels of behavior problems observed in children with…

FORUM: Instructional Communication and Millennial Students: Hoverboards and "Hovermoms": Helicopter Parents and Their Influence on Millennial Students' Rapport with Instructors

Science.gov (United States)

Frey, T. Kody; Tatum, Nicholas T.

2016-01-01

Popular culture is all too familiar with the notion of the helicopter parent. This suffocating sheltering extends students' adolescence and delays the development of independence (Price, 2010), causing millennials to rely on their parents for financial stability (White, 2015) and emotional support (Raphelson, 2014). Even in the midst of…

Parents' first concerns about toddlers with autism spectrum disorder: effect of sibling status.

Science.gov (United States)

Herlihy, Lauren; Knoch, Kelley; Vibert, Bethany; Fein, Deborah

2015-01-01

Symptoms of autism spectrum disorders may appear as early as 6 months, but parent concern, which can precipitate evaluation, often lags significantly. The presence of typical or atypical older siblings can change parents' sensitivity to departures from typical development. This study investigated type and age of parent's first concerns in toddlers with autism spectrum disorder, prior to diagnosis. Participants had (1) at least one older sibling with autism spectrum disorder (Sibs-ASD); (2) only typically developing older siblings (Sibs-TD), or (3) were only/oldest (No-Sibs). Specific autism spectrum disorder diagnoses and symptom severity were similar among groups. Developmentally, No-Sibs showed the largest delays, followed by Sibs-TD, followed by Sibs-ASD. Mean age of first concern was 16 months for No-Sibs, 14 months for Sibs-TD, and 10 months for Sibs-ASD. Age of first concern differed significantly by group, even after controlling for mother's age and education. Concern about language was prevalent in all groups. Thus, the presence of an older child with typical or, especially, atypical development was associated with earlier concerns for the affected child, despite milder developmental delays. These findings underscore the importance of encouraging parents to report concerns to pediatricians, routine standardized screening for autism spectrum disorder, and the need for pediatrician vigilance, especially for only or oldest children. © The Author(s) 2013.

Parental anxiety associated with Kawasaki disease in previously healthy children.

Science.gov (United States)

Chahal, Nita; Clarizia, Nadia A; McCrindle, Brian W; Boydell, Katherine M; Obadia, Maya; Manlhiot, Cedric; Dillenburg, Rejane; Yeung, Rae S M

2010-01-01

The objective of this study was to explore the lived experience of parents of children diagnosed with Kawasaki disease (KD) and to identify factors associated with increased levels of parental anxiety. Three focus groups were conducted including 25 parents of 17 patients with KD, seven (41%) of whom had coronary artery complications. A conceptual model was developed to depict parental experiences and illustrate the key issues related to heightened anxiety. Themes identified included anxiety related to the child's sudden illness and delay in obtaining a correct diagnosis because of the lack of health care providers' awareness and knowledge regarding KD. Parents were frustrated by the lack of information available in lay language and the limited scientific knowledge regarding the long-term consequences of the disease. Parents also reported positive transformations and different perspective toward challenges in life. However, the parents of children with coronary artery complications expressed persistent anxiety even years after the acute phase of the illness due to the uncertainty of the long-term prognosis. There remains a critical need for richly textured research data on the perspective and experience of families of children with KD. Copyright 2010 National Association of Pediatric Nurse Practitioners. Published by Mosby, Inc. All rights reserved.

Improved mass resolution and mass accuracy in TOF-SIMS spectra and images using argon gas cluster ion beams.

Science.gov (United States)

Shon, Hyun Kyong; Yoon, Sohee; Moon, Jeong Hee; Lee, Tae Geol

2016-06-09

The popularity of argon gas cluster ion beams (Ar-GCIB) as primary ion beams in time-of-flight secondary ion mass spectrometry (TOF-SIMS) has increased because the molecular ions of large organic- and biomolecules can be detected with less damage to the sample surfaces. However, Ar-GCIB is limited by poor mass resolution as well as poor mass accuracy. The inferior quality of the mass resolution in a TOF-SIMS spectrum obtained by using Ar-GCIB compared to the one obtained by a bismuth liquid metal cluster ion beam and others makes it difficult to identify unknown peaks because of the mass interference from the neighboring peaks. However, in this study, the authors demonstrate improved mass resolution in TOF-SIMS using Ar-GCIB through the delayed extraction of secondary ions, a method typically used in TOF mass spectrometry to increase mass resolution. As for poor mass accuracy, although mass calibration using internal peaks with low mass such as hydrogen and carbon is a common approach in TOF-SIMS, it is unsuited to the present study because of the disappearance of the low-mass peaks in the delayed extraction mode. To resolve this issue, external mass calibration, another regularly used method in TOF-MS, was adapted to enhance mass accuracy in the spectrum and image generated by TOF-SIMS using Ar-GCIB in the delayed extraction mode. By producing spectra analyses of a peptide mixture and bovine serum albumin protein digested with trypsin, along with image analyses of rat brain samples, the authors demonstrate for the first time the enhancement of mass resolution and mass accuracy for the purpose of analyzing large biomolecules in TOF-SIMS using Ar-GCIB through the use of delayed extraction and external mass calibration.

Effect of plasma rotation on sawtooth stabilization by beam ion

International Nuclear Information System (INIS)

Gorelenkov, N. N.; Nave, M. F. F.; Budny, R.; Cheng, C. Z.; Fu, G. Y.; Hastie, J.; Manickam, J.; Park, W.

2000-01-01

The sawtooth period in JET ELM-free H-Mode plasmas is increasing with Neutral Beam Injection (NBI) power. For injected power PNBI 12MW no large sawtooth crash is observed during the ELM-free period. However, as the edge stability is improved and external kink modes and ELMs are delayed, a possible sawtooth crash at a high plasma beta becomes a concern. In JET DT experiments, delaying sawteeth was found to be crucial in the quest for high fusion power. Fast particles are known to provide stabilizing effect on sawteeth, however, sawtooth stabilization by NBI ions is not clearly understood, since NBI ions are usually not ''fast'' enough to stabilize the m/n = 1/1 internal kink mode which is believed to cause the crash. In order to understand the observed sawteeth stabilization in tokamak experiments with NBI heating, the internal kink m/n = 1/1 mode stability of JET plasmas was modeled using the NOVA-K code, which is also benchmarked with the nonperturbative version of NOVA and the M3D code. Comparison of m/n = 1/1 mode stabilization by NBI ions in JET and TFTR and application of the nonlinear stabilization criteria is given

Parental immigration status is associated with children's health care utilization: findings from the 2003 new immigrant survey of US legal permanent residents.

Science.gov (United States)

Yun, Katherine; Fuentes-Afflick, Elena; Curry, Leslie A; Krumholz, Harlan M; Desai, Mayur M

2013-12-01

Our objective was to examine the association between parental immigration status and child health and health care utilization. Using data from a national sample of immigrant adults who had recently become legal permanent residents (LPR), children (n = 2,170) were categorized according to their parents' immigration status prior to LPR: legalized, mixed-status, refugee, temporary resident, or undocumented. Logistic regression with generalized estimating equations was used to compare child health and health care utilization by parental immigration status over the prior 12 months. Nearly all children in the sample were reported to be in good to excellent health. Children whose parents had been undocumented were least likely to have had an illness that was reported to have required medical attention (5.4 %). Children whose parents had been either undocumented or temporary residents were most likely to have a delayed preventive annual exam (18.2 and 18.7 %, respectively). Delayed dental care was most common among children whose parents had come to the US as refugees (29.1 %). Differences in the preventive annual exam remained significant after adjusting for socioeconomic characteristics. Parental immigration status before LPR was not associated with large differences in reported child health status. Parental immigration status before LPR was associated with the use of preventive annual exams and dental services. However, no group of children was consistently disadvantaged with respect to all measures.

Fuzzy delay model based fault simulator for crosstalk delay fault test ...

Indian Academy of Sciences (India)

In this paper, a fuzzy delay model based crosstalk delay fault simulator is proposed. As design trends move towards nanometer technologies, more number of new parameters affects the delay of the component. Fuzzy delay models are ideal for modelling the uncertainty found in the design and manufacturing steps.

Mother-daughter communication about sex: the influence of authoritative parenting style.

Science.gov (United States)

Askelson, Natoshia M; Campo, Shelly; Smith, Sandi

2012-01-01

Parent-child communication about sex has been shown to delay sexual activity and increase contraceptive and condom use. The influence of authoritative parenting style and mothers' perception of daughters' risk on communication about sex was examined in this study. Mothers in a random sample (n=283) with daughters aged 9-15 years were mailed surveys asking about communication with their daughters regarding 11 sex-related topics. Multivariate linear regression was used to assess the influence of authoritative parenting style and mothers' perceptions of risk on the number of topics communicated about and age of the daughter at time of communication for a variety of sexual health communication topics. Authoritative parenting style was related to the number of topics communicated about and was a predictor of age of daughter at the time of communication about sexual intercourse, menstruation, dating/relationships, sexually transmitted diseases (STDs), HIV/AIDS, alcohol, contraceptives, and abstinence, while perceptions of risk were not significant influencers of age at the time of communication for any topics. This research points to the importance of parenting style in determining the timing of parent-child communication about sexual and other risk behaviors.

Delayed diagnosis of congenital hypothyroidism in an adolescent results in avoidable complications: a case report

Directory of Open Access Journals (Sweden)

Indra Ihsan

2017-04-01

Full Text Available Delayed diagnosis of congenital hyporhyroidism (CH remains a serious problem. A retrospective analysis of 1,000 CH cases in Turkey found a mean age of 49 months at the time of clinical diagnosis. Only 3.1% of cases were diagnosed during the neonatal period and 55.4% were diagnosed after 2 years of age.1 In Cipto Mangunkusumo Hospital, Jakarta, 53% cases were diagnosed at 1-5 years, 3.3% at 6-12 years, and 6.7% after 12 years of age, while the remainder were diagnosed at < 1 year of age.2 The majority of affected children exhibit signs and symptoms that are highly non-specific, as most infants with CH are asymptomatic at birth, and only 5% of cases can be diagnosed based on clinical examination during the first day of life.3 The other factors that contribute to delayed diagnosis are uneducated parents, who do not notice or dismiss the importance of mild/moderate deviations in physical and mental growth, as well as constipation, feeding difficulties, or other vague, non-specific symptoms in infancy. Parents are often unaware of the importance of early diagnosis and commencement of therapy for CH.4

Italy: Delayed adaptation of social institutions to changes in family behaviour

Directory of Open Access Journals (Sweden)

Anna Laura Zanatta

2008-07-01

Full Text Available Considering its very low fertility and high age at childbearing, Italy stands alone in the European context and can hardly be compared with other countries, even those in the Southern region. The fertility decline occurred without any radical change in family formation. Individuals still choose (religious marriage for leaving their parental home and rates of marital dissolution and subsequent step-family formation are low. Marriage is being postponed and fewer people marry. The behaviours of young people are particularly alarming. There is a delay in all life cycle stages: end of education, entry into the labour market, exit from the parental family, entry into union, and managing an independent household. Changes in family formation and childbearing are constrained and slowed down by a substantial delay (or even failure with which the institutional and cultural framework has adapted to changes in economic and social conditions, in particular to the growth of the service sector, the increase in female employment and the female level of education. In a Catholic country that has been led for almost half a century by a political party with a Catholic ideology, the paucity of attention to childhood and youth seems incomprehensible. Social policies focus on marriage-based families already formed and on the phases of life related to pregnancy, delivery, and the first months of a newborn's life, while forming a family and childbearing choices are considered private affairs and neglected.

On the cost/delay tradeoff of wireless delay tolerant geographic routing

OpenAIRE

Tasiopoulos, Argyrios; Tsiaras, Christos; Toumpis, Stavros

2012-01-01

In Delay Tolerant Networks (DTNs), there is a fundamental tradeoff between the aggregate transport cost of a packet and the delay in its delivery. We study this tradeoff in the context of geographical routing in wireless DTNs.We ?rst specify the optimal cost/delay tradeoff, i.e., the tradeoff under optimal network operation, using a dynamic network construction termed the Cost/Delay Evolving Graph (C/DEG) and the Optimal Cost/Delay Curve (OC/DC), a function that gives the minimum possible agg...

Leveraging delay discounting for health: Can time delays influence food choice?

Science.gov (United States)

Appelhans, Bradley M; French, Simone A; Olinger, Tamara; Bogucki, Michael; Janssen, Imke; Avery-Mamer, Elizabeth F; Powell, Lisa M

2018-03-15

Delay discounting, the tendency to choose smaller immediate rewards over larger delayed rewards, is theorized to promote consumption of immediately rewarding but unhealthy foods at the expense of long-term weight maintenance and nutritional health. An untested implication of delay discounting models of decision-making is that selectively delaying access to less healthy foods may promote selection of healthier (immediately available) alternatives, even if they may be less desirable. The current study tested this hypothesis by measuring healthy versus regular vending machine snack purchasing before and during the implementation of a 25-s time delay on the delivery of regular snacks. Purchasing was also examined under a $0.25 discount on healthy snacks, a $0.25 tax on regular snacks, and the combination of both pricing interventions with the 25-s time delay. Across 32,019 vending sales from three separate vending locations, the 25-s time delay increased healthy snack purchasing from 40.1% to 42.5%, which was comparable to the impact of a $0.25 discount (43.0%). Combining the delay and the discount had a roughly additive effect (46.0%). However, the strongest effects were seen under the $0.25 tax on regular snacks (53.7%) and the combination of the delay and the tax (50.2%). Intervention effects varied substantially between vending locations. Importantly, time delays did not harm overall vending sales or revenue, which is relevant to the real-world feasibility of this intervention. More investigation is needed to better understand how the impact of time delays on food choice varies across populations, evaluate the effects of time delays on beverage vending choices, and extend this approach to food choices in contexts other than vending machines. ClinicalTrials.gov, NCT02359916. Copyright © 2018 Elsevier Ltd. All rights reserved.

Risk moderation of a parent and student preventive alcohol intervention by adolescent and family factors: a cluster randomized trial.

Science.gov (United States)

Verdurmen, Jacqueline E E; Koning, Ina M; Vollebergh, Wilma A M; van den Eijnden, Regina J J M; Engels, Rutger C M E

2014-03-01

To examine risk moderation of an alcohol intervention targeting parents and adolescents. A cluster randomized trial including 2937 Dutch early adolescents (m=12.68years, SD=0.51) and their parents randomized over four conditions: parent intervention, student intervention, combined parent-student intervention, and control group. 152 classes of 19 high schools in The Netherlands (2006). Moderators at baseline (adolescent: gender, educational level and externalizing behavior; parent: educational level and heavy alcohol use) were used to examine the differential effects of the interventions on onset of (heavy) weekly drinking at 22-month follow-up. The combined intervention effectively delayed the onset of weekly drinking in the general population of adolescents, and was particularly effective in delaying the onset of heavy weekly drinking in a higher-risk subsample of adolescents (i.e. those attending lower levels of education and reporting higher levels of externalizing behavior). Present and previous results have established the combined intervention to be universally effective in postponing weekly alcohol use among Dutch adolescents, with an added effect on postponing heavy weekly drinking in high risk subgroups. Therefore, implementation of this intervention in the general population of schools in The Netherlands is advised. NTR649. Copyright © 2013 Elsevier Inc. All rights reserved.

Mobility and diffusion of atomic helium and neon ions in their parent gases

International Nuclear Information System (INIS)

Skullerud, H.R.; Larsen, P.-H.

1990-01-01

The mobility and the diffusion tensor have been calculated for He + ions in He and Ne + ions in Ne, at temperatures of 77-78 and 294 K, and at field-to-density values E/n 0 up to 2000 Td. For He + ions in He, ab initio potentials were used, with a careful extrapolation to large distances. A slight adjustment of the mean potential resulted in agreement between calculated mobilities and the best experimental values to better than 0.5%. For Ne + ions in Ne, a potential model with three adjustable parameters was constructed, and an overall agreement between measured and calculated mobilities to better than 1% was obtained. The model potentials probably give a good estimate of the gerade-ungerade splitting at internuclear distances from 7.5 to 10 au, but are not expected to be accurate at shorter distances. (author)

Parenting Style and the Timing of Jewish Adolescents’ Sexual Debut

Directory of Open Access Journals (Sweden)

Robby Etzkin

2010-06-01

Full Text Available Parenting style and its effect on the timing of Jewish adolescents’ sexual debuts were examined in the reported study. One hundred sixty-eight research participants between the ages of 18 and 22 from a large university in the Southeast participated in the study. A survey instrument was administered at three fraternities and two sororities to examine parenting style and sexual debut retrospectively. Data were analyzed using descriptive statistics, frequency chi square tests, and Analysis of Variance (ANOVA; while post hoc results were determined through Tukey’s honestly significant difference. Results found that authoritative parenting provides a delay in the age of sexual debut for Jewish adolescents. All other parenting styles had mean ages less than the overall mean age of sexual debut, 17.10 years old, with indifferent parenting having the earliest debut. These findings suggest that parenting style may affect the timing of Jewish adolescents’ sexual debut. The study has implications for understanding factors that may affect the timing of a Jewish adolescent’s sexual debut and may help parents protect their adolescent from the negative effects associated with early sexual debut, such as low academic achievement. Recommendations for future research include exploring the effects of family structure and peer networks to understand fully the many factors that affect the timing of adolescents’ sexual debut.

Parenting in adults with attention-deficit/hyperactivity disorder (ADHD)☆

Science.gov (United States)

Johnston, Charlotte; Mash, Eric J.; Miller, Natalie; Ninowski, Jerilyn E.

2013-01-01

Although the validity of adult ADHD is well established and research has identified a variety of impairments associated with the condition in adults, study of how ADHD impacts an adult’s ability to parent has been relatively neglected. Parenting is a particularly important domain of functioning given the familial nature of the disorder and emerging evidence that parenting behaviors play a role in the development or maintenance of child ADHD symptoms, comorbid psychopathologies, and other associated difficulties. In this paper, we focus on three broad categories of cognitive dysfunction proposed across models of ADHD — cognitive processes (e.g., working memory, planning, and inhibitory control), self-regulation deficits (e.g., self-monitoring of performance to detect errors or the need for regulation of behavior and/or emotions), and motivational or arousal difficulties (e.g., response to incentives, delay aversion). We consider how these deficits may lead to impairments in the parenting behaviors of effective behavioral control and emotional responsiveness, and review the available evidence regarding parenting in adults with ADHD symptoms. We conclude by noting the limitations in existing studies, and argue for further research that is theoretically grounded in how core deficits of ADHD may be related to dimensions of parenting. The implications of an improved understanding of how ADHD impacts parenting for the development of early intervention or prevention programs are outlined. PMID:22459785

THE INFLUENCE OF CULTURAL VALUES ON THE PARENT-CHILD INTERACTION PATTERNS OF FAMILIES FROM AN ASIAN BACKGROUND

OpenAIRE

NADINE AWDE

2009-01-01

The objective of this paper is to critically review previous studies of intervention programs that focus on parent-child interaction, in order to pinpoint deficiencies in this area of study and to recommend further research. Indeed, more interventionists and speech and language therapists must identify parent-child interaction patterns, especially when following a family-centred approach in the treatment of speech impairments or language delays. This review stresses that the cultural ...

Representing delayed force feedback as a combination of current and delayed states.

Science.gov (United States)

Avraham, Guy; Mawase, Firas; Karniel, Amir; Shmuelof, Lior; Donchin, Opher; Mussa-Ivaldi, Ferdinando A; Nisky, Ilana

2017-10-01

To adapt to deterministic force perturbations that depend on the current state of the hand, internal representations are formed to capture the relationships between forces experienced and motion. However, information from multiple modalities travels at different rates, resulting in intermodal delays that require compensation for these internal representations to develop. To understand how these delays are represented by the brain, we presented participants with delayed velocity-dependent force fields, i.e., forces that depend on hand velocity either 70 or 100 ms beforehand. We probed the internal representation of these delayed forces by examining the forces the participants applied to cope with the perturbations. The findings showed that for both delayed forces, the best model of internal representation consisted of a delayed velocity and current position and velocity. We show that participants relied initially on the current state, but with adaptation, the contribution of the delayed representation to adaptation increased. After adaptation, when the participants were asked to make movements with a higher velocity for which they had not previously experienced with the delayed force field, they applied forces that were consistent with current position and velocity as well as delayed velocity representations. This suggests that the sensorimotor system represents delayed force feedback using current and delayed state information and that it uses this representation when generalizing to faster movements. NEW & NOTEWORTHY The brain compensates for forces in the body and the environment to control movements, but it is unclear how it does so given the inherent delays in information transmission and processing. We examined how participants cope with delayed forces that depend on their arm velocity 70 or 100 ms beforehand. After adaptation, participants applied opposing forces that revealed a partially correct representation of the perturbation using the current and the

Parenting and Adolescent Self-Regulation Mediate between Family Socioeconomic Status and Adolescent Adjustment

Science.gov (United States)

Farley, Julee P.; Kim-Spoon, Jungmeen

2017-01-01

Using two waves of longitudinal data, we utilized the family stress model of economic hardship to test whether family socioeconomic status is related to adolescent adjustment (substance use and academic achievement) through parental knowledge and adolescent self-regulation (behavioral self-control and delay discounting). Participants included 220…

Is "treat your child normally" helpful advice for parents of survivors of treatment of hypoplastic left heart syndrome?

Science.gov (United States)

Rempel, Gwen R; Harrison, Margaret J; Williamson, Deanna L

2009-04-01

Developing technology affords children with complex congenitally malformed hearts a chance for survival. Parents gratefully pursue life-saving options on behalf of their children, despite the risks to the life of their child, and uncertainty about outcomes. Little is known about how mothers and fathers experience parenting a child whose new state as a survivor may include less than optimal developmental sequels. Our study involved multiple interactive interviews with 9 mothers and 7 fathers of infants and preschool children with hypoplastic left heart syndrome who had survived the Norwood surgical approach. Qualitative methodology included grounded theory methods of simultaneous collection and analysis of data, and we used open and selective coding of transcribed interviews. Parents used normalization in the context of uncertainty regarding the ongoing survival of their child. Parents described their underweight children as being on their own growth curve, and viewed their developmental progress, however delayed, as reason for celebration, as they had been prepared for their child to die. There is growing evidence that children with congenitally malformed hearts who require surgical intervention during the first year of life may experience developmental delay. The use of normalization by their parents may be effective in decreasing their worry regarding the uncertain future faced by their child, but may negatively affect the developmental progress of the child if they do not seek resources to assist development. Advice from paediatric specialists for parents to view their children as normal needs to be balanced with assistance for parents to access services to support optimal growth and development of their child.

Molecular ions in comet tails

International Nuclear Information System (INIS)

Wyckoff, S.; Wehinger, P.A.

1976-01-01

Band intensities of the molecular ions CH + , CO + , N 2 + , and H 2 O + have been determined on an absolute scale from tail spectra of comet Kohoutek (1973f) and comet Bradfield (1974b). Photoionization and photodissociation rates have been computed for CH, CO, and N 2 . Also emission rate excitation g-factors for (1) photoionization plus excitation and (2) resonance fluorescence have been computed for the observed ions. It is shown that resonance fluorescence is the dominant excitation mechanism for observed comet tail ions at rapprox. =1 AU. Band system luminosities and molecular ion abundances within a projected nuclear distance rho 4 km have been determined for CH + , CO + , N 2 + , and H 2 O + in comet Kohoutek, and for H 2 O + in comet Bradfield. Estimates are also given for column densities of all observed ions at rhoapprox. =10 4 km on the tailward side of the coma. The observed H 2 O + column densities were found to be roughly the same in comet Kohoutek and comet Bradfield et equal heliocentric distances, while CO + was found to be approximately 100 times more abundant than H 2 O + , N 2 + , and CH + at rhoapprox. =10 4 km in comet Kohoutek. Finally, the relative abundances of the observed ions and of the presumed parent neutral species are briefly discussed

LEVIS ion source and beam characterization on PBFA-II

International Nuclear Information System (INIS)

Renk, T.J.; Tisone, G.C.; Adams, R.G.; Bailey, J.E.; Filuk, A.B.; Johnson, D.J.; Pointon, T.D.

1993-01-01

We report on the continuing development of the LEVIS (Laser Evaporation Ion Source) lithium active ion source for the 15-cm radial focussing ion diode on PBFA-11. We found previously that DC-heating of the anode surface to 150 degrees C maximum for 5 hours resulted in a pure lithium beam. This paper discusses the characterization of LEVIS source uniformity by Faraday cup arrays and multiple lines of sight for visible light spectroscopy. These diagnostics give some evidence of nonuniformity in both A-K gap electric fields and ion current density. Despite this, however, the measured focal spot size appears smaller than with a passive LiF source operated in the same magnetic field topology. Experiments using a curved anode for vertical beam focussing show reduced ion beam turn-on delay by 5 ns by altering the magnetic field topology as well as anode curvature. Another 3--5 ns reduction was achieved by switching from a passive LiF to the active LEVIS source

Asymptotic Delay Analysis for Cross-Layer Delay-Based Routing in Ad Hoc Networks

Directory of Open Access Journals (Sweden)

Philippe Jacquet

2007-01-01

Full Text Available This paper addresses the problem of the evaluation of the delay distribution via analytical means in IEEE 802.11 wireless ad hoc networks. We show that the asymptotic delay distribution can be expressed as a power law. Based on the latter result, we present a cross-layer delay estimation protocol and we derive new delay-distribution-based routing algorithms, which are well adapted to the QoS requirements of real-time multimedia applications. In fact, multimedia services are not sensitive to average delays, but rather to the asymptotic delay distributions. Indeed, video streaming applications drop frames when they are received beyond a delay threshold, determined by the buffer size. Although delay-distribution-based routing is an NP-hard problem, we show that it can be solved in polynomial time when the delay threshold is large, because of the asymptotic power law distribution of the link delays.

Association between delayed bedtime and sleep-related problems among community-dwelling 2-year-old children in Japan.

Science.gov (United States)

Kitamura, Shingo; Enomoto, Minori; Kamei, Yuichi; Inada, Naoko; Moriwaki, Aiko; Kamio, Yoko; Mishima, Kazuo

2015-03-13

Although delayed sleep timing causes many socio-psycho-biological problems such as sleep loss, excessive daytime sleepiness, obesity, and impaired daytime neurocognitive performance in adults, there are insufficient data showing the clinical significance of a 'night owl lifestyle' in early life. This study examined the association between habitual delayed bedtime and sleep-related problems among community-dwelling 2-year-old children in Japan. Parents/caregivers of 708 community-dwelling 2-year-old children in Nishitokyo City, Tokyo, participated in the study. The participants answered a questionnaire to evaluate their child's sleep habits and sleep-related problems for the past 1 month. Of the 425 children for whom complete data were collected, 90 (21.2%) went to bed at 22:00 or later. Children with delayed bedtime showed significantly more irregular bedtime, delayed wake time, shorter total sleep time, and difficulty in initiating and terminating sleep. Although this relationship indicated the presence of sleep debt in children with delayed bedtime, sleep onset latency did not differ between children with earlier bedtime and those with delayed bedtime. Rather, delayed bedtime was significantly associated with bedtime resistance and problems in the morning even when adjusting for nighttime and daytime sleep time. Even in 2-year-old children, delayed bedtime was associated with various sleep-related problems. The causal factors may include diminished homeostatic sleep drive due to prolonged daytime nap as well as diurnal preference (morning or night type) regulated by the biological clock.

Photoperiod Modulates Fast Delayed Rectifier Potassium Currents in the Mammalian Circadian Clock.

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Farajnia, Sahar; Meijer, Johanna H; Michel, Stephan

2016-10-01

One feature of the mammalian circadian clock, situated in the suprachiasmatic nucleus (SCN), is its ability to measure day length and thereby contribute to the seasonal adaptation of physiology and behavior. The timing signal from the SCN, namely the 24 hr pattern of electrical activity, is adjusted according to the photoperiod being broader in long days and narrower in short days. Vasoactive intestinal peptide and gamma-aminobutyric acid play a crucial role in intercellular communication within the SCN and contribute to the seasonal changes in phase distribution. However, little is known about the underlying ionic mechanisms of synchronization. The present study was aimed to identify cellular mechanisms involved in seasonal encoding by the SCN. Mice were adapted to long-day (light-dark 16:8) and short-day (light-dark 8:16) photoperiods and membrane properties as well as K + currents activity of SCN neurons were measured using patch-clamp recordings in acute slices. Remarkably, we found evidence for a photoperiodic effect on the fast delayed rectifier K + current, that is, the circadian modulation of this ion channel's activation reversed in long days resulting in 50% higher peak values during the night compared with the unaltered day values. Consistent with fast delayed rectifier enhancement, duration of action potentials during the night was shortened and afterhyperpolarization potentials increased in amplitude and duration. The slow delayed rectifier, transient K + currents, and membrane excitability were not affected by photoperiod. We conclude that photoperiod can change intrinsic ion channel properties of the SCN neurons, which may influence cellular communication and contribute to photoperiodic phase adjustment. © The Author(s) 2016.

Photoperiod Modulates Fast Delayed Rectifier Potassium Currents in the Mammalian Circadian Clock

Directory of Open Access Journals (Sweden)

Sahar Farajnia

2016-09-01

Full Text Available One feature of the mammalian circadian clock, situated in the suprachiasmatic nucleus (SCN, is its ability to measure day length and thereby contribute to the seasonal adaptation of physiology and behavior. The timing signal from the SCN, namely the 24 hr pattern of electrical activity, is adjusted according to the photoperiod being broader in long days and narrower in short days. Vasoactive intestinal peptide and gamma-aminobutyric acid play a crucial role in intercellular communication within the SCN and contribute to the seasonal changes in phase distribution. However, little is known about the underlying ionic mechanisms of synchronization. The present study was aimed to identify cellular mechanisms involved in seasonal encoding by the SCN. Mice were adapted to long-day (light–dark 16:8 and short-day (light–dark 8:16 photoperiods and membrane properties as well as K+ currents activity of SCN neurons were measured using patch-clamp recordings in acute slices. Remarkably, we found evidence for a photoperiodic effect on the fast delayed rectifier K+ current, that is, the circadian modulation of this ion channel’s activation reversed in long days resulting in 50% higher peak values during the night compared with the unaltered day values. Consistent with fast delayed rectifier enhancement, duration of action potentials during the night was shortened and afterhyperpolarization potentials increased in amplitude and duration. The slow delayed rectifier, transient K+ currents, and membrane excitability were not affected by photoperiod. We conclude that photoperiod can change intrinsic ion channel properties of the SCN neurons, which may influence cellular communication and contribute to photoperiodic phase adjustment.

Parent-Teen Communication and Pre-College Alcohol Involvement: A Latent Class Analysis

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Abar, Caitlin C.; Fernandez, Anne C.; Wood, Mark D.

2011-01-01

Although parent-adolescent communication has been identified as important in delaying the onset and escalation of alcohol use, both the strength and direction of observed associations has varied in prior research with adolescents and college students. The current study categorizes parents according to alcohol-related communication and relates these categories to other parenting factors and late adolescent alcohol involvement. Method As part of a larger study, 1,007 college-bound teens and their parents were assessed. Teens were asked to report on their drinking behavior, and parents were asked about the occurrence of several specific alcohol-related communications with their teen, as well as additional parenting characteristics. Profiles of parent alcohol-related communication were derived using latent class analysis. Once the best fitting solution was determined, covariates were entered predicting class membership and investigating how classes were associated with additional parenting characteristics and teen alcohol use. Results A five-class solution provided the best fit to the data: Frequent, All Topics (28%); Moderate, All Topics (25%); Frequent, General Topics (25%); Frequent, Consequences and Limits (12%); and Infrequent, All Topics (10%). Covariate analyses demonstrated class differences with regard to parental modeling, monitoring, knowledge, and parent-teen relationship satisfaction, as well as for students’ intentions to join fraternities/sororities and alcohol use. Conclusions Findings from the current study add to a small but growing literature supporting the continuing influence of parents in late adolescence and suggest that the frequency and specificity of parent-teen communication are potentially informative for refined parent-based preventive interventions. PMID:21864983

Parental quality of life in complex paediatric neurologic disorders of unknown aetiology.

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van Nimwegen, K J M; Kievit, W; van der Wilt, G J; Schieving, J H; Willemsen, M A A P; Donders, A R T; Verhaak, C M; Grutters, J P C

2016-09-01

Complex paediatric neurology (CPN) patients generally present with non-specific symptoms, such as developmental delay, impaired movement and epilepsy. The diagnostic trajectory in these disorders is usually complicated and long-lasting, and may be burdensome to the patients and their parents. Additionally, as caring for a chronically ill child can be stressful and demanding, parents of these patients may experience impaired health-related quality of life (HRQoL). This study aims to assess parental HRQoL and factors related to it in CPN. Physical and mental HRQoL of 120 parents was measured and compared to the general population using the SF-12 questionnaire. Parents also completed this questionnaire for the measurement of patient HRQoL. Additional questionnaires were used to measure parental uncertainty (Visual Analogue Scale) and worry phenomena (Penn State Worry Questionnaire), and to obtain socio-demographic data. A linear mixed model with random effect was used to investigate which of these variables were associated with parental HRQoL. As compared to the general population, HRQoL of these parents appeared diminished. Fathers showed both lowered physical (51.76, p parental worry phenomena were significantly correlated with overall and mental parental HRQoL. The reduction in parental mental HRQoL is alarming, also because children strongly rely on their parents and parental mental health is known to influence children's health. Awareness of these problems among clinicians, and supportive care if needed are important to prevent exacerbation of the problems. Copyright © 2016 European Paediatric Neurology Society. Published by Elsevier Ltd. All rights reserved.

A Linkage Between Parent Materials of Soil and Potential Risk of Heavy Metals in Yunnan province, China

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Cheng, X.

2015-12-01

A large area exceeding soil quality standards for heavy metals in South western China has been identified previously reported on a nationwide survey of soil pollution, yet the ecological risk of heavy metal in soil is unknown or uncertainty.To assess thoroughly the ecological risk in this region, seven soil profiles with a depth of 2m on the different parent materials of soil were conducted in Yunnan province, China, and the level of total concentrations and the fraction of water soluble, ion exchangeable, carbonates, humic acid, iron and manganese oxides and organic matter of As, Cd, Hg and Pb was investigated in soil profiles. The results indicate that parent materials of soil critically influenced the ecological risk of heavy metal.The fraction of water soluble and ion exchangeable of Cd and Hg in alluvial material and in terrigenous clastic rocks showed 2-6 times higher than those in carbonate rock; As and Pb has almost same fraction of water soluble and ion exchangeable in three parent materials of soil.The findings suggest that parent materials of soil play a critical role in ecological risk of heavy metal.Thus, more studies are needed to better understand a linkage between the parent materials of soil, different soil-forming processes and the potential risk of heavy metals under various geographic conditions, which is the key for the evaluating soil quality and food safety. Those soils with high concentration of Cd and Hg originated alluvial material and terrigenous clastic rocks need to be continuously monitored before determining a cost-effective remediation technology. Keywords: Heavy metals; Ecological risk;Parent materials of soil;China

Infrared laser dissociation of single megadalton polymer ions in a gated electrostatic ion trap: the added value of statistical analysis of individual events.

Science.gov (United States)

Halim, Mohammad A; Clavier, Christian; Dagany, Xavier; Kerleroux, Michel; Dugourd, Philippe; Dunbar, Robert C; Antoine, Rodolphe

2018-05-07

In this study, we report the unimolecular dissociation mechanism of megadalton SO 3 -containing poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS) polymer cations and anions with the aid of infrared multiphoton dissociation coupled to charge detection ion trap mass spectrometry. A gated electrostatic ion trap ("Benner trap") is used to store and detect single gaseous polymer ions generated by positive and negative polarity in an electrospray ionization source. The trapped ions are then fragmented due to the sequential absorption of multiple infrared photons produced from a continuous-wave CO 2 laser. Several fragmentation pathways having distinct signatures are observed. Highly charged parent ions characteristically adopt a distinctive "stair-case" pattern (assigned to the "fission" process) whereas low charge species take on a "funnel like" shape (assigned to the "evaporation" process). Also, the log-log plot of the dissociation rate constants as a function of laser intensity between PAMPS positive and negative ions is significantly different.

Maternal control and early child dysregulation: Moderating roles of ethnicity and child delay status.

Science.gov (United States)

Caplan, B; Baker, B L

2017-02-01

Maternal controlling behaviour has been found to influence child development, particularly in behavioural and emotional regulation. Given the higher rates of interfering parent control found in mothers of children with developmental delays (DD) and Latina mothers, their children could be at increased risk for behavioural and emotional dysregulation. While studies generally support this increased risk for children with DD, findings for Latino children are mixed and often attributed to cultural models of child rearing. The present study sought to determine the moderating roles of child DD and mother ethnicity in determining the relationships between two types of parent control (supportive directiveness and interference) and child dysregulation over time. The present study, involving 178 3-year old children with DD (n = 80) or typical development (n = 98), examined observed parent control (directive versus interfering) of Latina and Anglo mothers as it relates to change in preschool child dysregulation over 2 years. Interfering parent control was greater for children with DD and also for Latino mothers. Supportive directive parenting generally related to relatively greater decline in child behaviour and emotion dysregulation over time, while interfering parenting generally related to less decline in child behaviour dysregulation over time. In Anglo but not Latino families, these relationships tended to vary as a function of child disability. Parent directives that support, rather than deter, ongoing child activity may promote positive regulatory development. These results particularly hold for children with DD and Latino families, and have implications for parenting practices and intervention. © 2016 MENCAP and International Association of the Scientific Study of Intellectual and Developmental Disabilities and John Wiley & Sons Ltd.

Alternans promotion in cardiac electrophysiology models by delay differential equations.

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Gomes, Johnny M; Dos Santos, Rodrigo Weber; Cherry, Elizabeth M

2017-09-01

Cardiac electrical alternans is a state of alternation between long and short action potentials and is frequently associated with harmful cardiac conditions. Different dynamic mechanisms can give rise to alternans; however, many cardiac models based on ordinary differential equations are not able to reproduce this phenomenon. A previous study showed that alternans can be induced by the introduction of delay differential equations (DDEs) in the formulations of the ion channel gating variables of a canine myocyte model. The present work demonstrates that this technique is not model-specific by successfully promoting alternans using DDEs for five cardiac electrophysiology models that describe different types of myocytes, with varying degrees of complexity. By analyzing results across the different models, we observe two potential requirements for alternans promotion via DDEs for ionic gates: (i) the gate must have a significant influence on the action potential duration and (ii) a delay must significantly impair the gate's recovery between consecutive action potentials.

Alternans promotion in cardiac electrophysiology models by delay differential equations

Science.gov (United States)

Gomes, Johnny M.; dos Santos, Rodrigo Weber; Cherry, Elizabeth M.

2017-09-01

Cardiac electrical alternans is a state of alternation between long and short action potentials and is frequently associated with harmful cardiac conditions. Different dynamic mechanisms can give rise to alternans; however, many cardiac models based on ordinary differential equations are not able to reproduce this phenomenon. A previous study showed that alternans can be induced by the introduction of delay differential equations (DDEs) in the formulations of the ion channel gating variables of a canine myocyte model. The present work demonstrates that this technique is not model-specific by successfully promoting alternans using DDEs for five cardiac electrophysiology models that describe different types of myocytes, with varying degrees of complexity. By analyzing results across the different models, we observe two potential requirements for alternans promotion via DDEs for ionic gates: (i) the gate must have a significant influence on the action potential duration and (ii) a delay must significantly impair the gate's recovery between consecutive action potentials.

Ion heat pulse after sawtooth crash in the JFT-2M tokamak

International Nuclear Information System (INIS)

Miura, Y.; Okano, F.; Suzuki, N.; Mori, M.; Hoshino, K.; Maeda, H.; Takizuka, T.; Itoh, K.; Itoh, S.

1993-08-01

The ion heat pulse after sawtooth crash is studied with the time-of-flight neutral measurement on the JFT-2M tokamak. The rapid change of the bulk ion energy distribution near the edge is observed after sawtooth crash. The delay time is measured and the effective measuring position is estimated by a neutral transport code, then the thermal conductivity, χ i HP , of about 15±10m 2 /sec is evaluated for the L-mode plasma. The simple diffusive model with constant χ i HP , however, does not explain the amplitude of the pulse in the ion energy distribution. (author)

Can We Identify Parents Who Do Not Verbally Share Concerns for Their Children's Development?

Science.gov (United States)

Eremita, Matthew; Semancik, Eileen; Lerer, Trudy; Dworkin, Paul H

2017-04-01

We aimed to identify characteristics of parents who do not voice developmental concerns when prompted by their children's nurse and/or primary care provider (PCP), despite reporting concerns on parent-completed questionnaires. We reviewed 376 medical records of children seen for a 9-month well-child visit in an urban pediatric clinic between September 2011 and December 2012 for sociodemographic variables hypothesized to affect parents' sharing of developmental concerns: the child's birth order and gender; parents' education level, employment, relationship status, and primary language; and family size and racial/ethnic background. The target population was parents who reported concerns on the Parents' Evaluation of Developmental Status (PEDS), a routinely administered, parent-completed screening questionnaire. We subdivided parents who reported concerns on the PEDS (N = 86) based on whether they voiced developmental concerns when prompted by their children's nurse and/or PCP. Two-sided Fisher's exact tests and logistic regression evaluated the relationship between sociodemographic variables and parents' voicing of developmental concerns. Only parent education approached significance, as parents with less than a high school education (children's development than parents with at least a high school degree or equivalent (≥HS) (63% compared to 35%, p = .056). Univariate logistic regression analysis showed that parents with Parents with low educational attainment may be more likely to not verbally share their developmental concerns. For children of such parents, early detection of developmental delay may be strengthened by use of written questionnaires.

Fuzzy delay model based fault simulator for crosstalk delay fault test ...

Indian Academy of Sciences (India)

In this paper, a fuzzy delay model based crosstalk delay fault simulator is proposed. As design .... To find the quality of non-robust tests, a fuzzy delay ..... Dubois D and Prade H 1989 Processing Fuzzy temporal knowledge. IEEE Transactions ...

Electric protection of the ion sources of the Ogra-4 device

International Nuclear Information System (INIS)

Matveev, N.V.; Obysov, V.A.

1984-01-01

Electric circuit of an ion source power supply comprising elements for protection from damages in case of discharges inside the source, has been described. The possibility of protection against discharge and subsequent reclosing switching of the ion source using consecutive protective key element in the circuit of power supply emission electrode, electron commutator being used as one, has been studied. Results of the use of commutators on the basis of electron-beam valves as the main commutating element are presented. Application of the circuit described permitted to achieve voltage restoration on the ion source electrodes when the valve reclosing switching time delay constituted 200 μs

When is thermodynamics relevant to ion-induced atomic rearrangements in metals

International Nuclear Information System (INIS)

Johnson, W.L.; Cheng, Y.T.; Van Rossum, M.; Nicolet, M.A.

1984-08-01

The problem of ion-induced mixing of metal bilayers is examined in the limit of heavy metals (Z > 20) and heavy energetic ions (E > 100 keV) and in the absence of delayed effects such as radiation enhanced thermal diffusion. Thermochemical effects are shown to play an important role in biasing the random walk process of mixing. A universal mixing equation is derived which predicts the evolution of the concentration profile as a function of ion dose. Finally, a model is presented which allows one to predict what metallurgical phases are formed during the mixing process. Criteria for amorphous phase formation are particularly emphasized

Delayed power analysis

International Nuclear Information System (INIS)

Adamovich, L.A.; Azarov, V.V.

1999-01-01

Time dependent core power behavior in a nuclear reactor is described with well-known neutron kinetics equations. At the same time, two portions are distinguished in energy released from uranium nuclei fission; one released directly at fission and another delayed (residual) portion produced during radioactive decay of fission products. While prompt power is definitely described with kinetics equations, the delayed power presentation still remains outstanding. Since in operation the delayed power part is relatively small (about 6%) operation, it can be neglected for small reactivity disturbances assuming that entire power obeys neutron kinetics equations. In case of a high negative reactivity rapidly inserted in core (e.g. reactor scram initiation) the prompt and delayed components can be calculated separately with practically no impact on each other, employing kinetics equations for prompt power and known approximation formulas for delayed portion, named residual in this specific case. Under substantial disturbances the prompt component in the dynamic process becomes commensurable with delayed portion, thus making necessary to take into account their cross impact. A system of differential equations to describe time-dependent behavior of delayed power is presented. Specific NPP analysis shows a way to significantly simplify the task formulation. (author)

Coprecipitation of alkali metal ions with calcium carbonate

International Nuclear Information System (INIS)

Okumura, Minoru; Kitano, Yasushi

1986-01-01

The coprecipitation of alkali metal ions Li + , Na + , K + and Rb + with calcium carbonate has been studied experimentally and the following results have been obtained: (1) Alkali metal ions are more easily coprecipitated with aragonite than with calcite. (2) The relationship between the amounts of alkali metal ions coprecipitated with aragonite and their ionic radii shows a parabolic curve with a peak located at Na + which has approximately the same ionic radius as Ca 2+ . (3) However, the amounts of alkali metal ions coprecipitated with calcite decrease with increasing ionic radius of alkali metals. (4) Our results support the hypothesis that (a) alkali metals are in interstitial positions in the crystal structure of calcite and do not substitute for Ca 2+ in the lattice, but (b) in aragonite, alkali metals substitute for Ca 2+ in the crystal structure. (5) Magnesium ions in the parent solution increase the amounts of alkali metal ions (Li + , Na + , K + and Rb + ) coprecipitated with calcite but decrease those with aragonite. (6) Sodium-bearing aragonite decreases the incorporation of other alkali metal ions (Li + , K + and Rb + ) into the aragonite. (author)

Reducing hospital expenditures with the COPE (Creating Opportunities for Parent Empowerment) program for parents and premature infants: an analysis of direct healthcare neonatal intensive care unit costs and savings.

Science.gov (United States)

Melnyk, Bernadette Mazurek; Feinstein, Nancy Fischbeck

2009-01-01

More than 500,000 premature infants are born in the United States every year. Preterm birth results in a multitude of negative adverse outcomes for children, including extended stays in the neonatal intensive care unit (NICU), developmental delays, physical and mental health/behavioral problems, increased medical utilization, and poor academic performance. In addition, parents of preterms experience a higher incidence of depression and anxiety disorders along with altered parent-infant interactions and overprotective parenting, which negatively impact their children. The costs associated with preterm birth are exorbitant. In 2005, it is estimated that preterm birth cost the United States $26.2 billion. The purpose of this study was to perform a cost analysis of the Creating Opportunities for Parent Empowerment (COPE) program for parents of premature infants, a manualized educational-behavioral intervention program comprising audiotaped information and an activity workbook that is administered to parents in 4 phases, the first phase commencing 2 to 4 days after admission to the NICU. Findings indicated that the COPE program resulted in cost savings of at least $4864 per infant. In addition to improving parent and child outcomes, routine implementation of COPE in NICUs across the United States could save the healthcare system more than $2 billion per year.

Impact of the Diagnostic Process on Parents of Infants and Preschool Children. Final Report.

Science.gov (United States)

Tice, Terrence N.; Hanson, Janice L.

In an investigation of the impact of the psychological/educational diagnostic process on the parents of young children at risk for developmental delay, 18 families completed questionnaires and were interviewed concerning their child's evaluation. Transcribed interviews conducted 1-2 weeks after the evaluation and 4 months after the evaluations…

Patient Delay, Diagnosis Delay and Treatment Delay for Breast Cancer: Comparison of the Pattern between Patients in Public and Private Health Sectors

Directory of Open Access Journals (Sweden)

Iraj Harirchi

2015-05-01

Full Text Available Background: The purpose of this study was to compare patient delay, diagnosis delay and treatment delay in breast cancer patients of selected public and private health centers in Tehran, Iran.Methods: In this cross-sectional study, female patients with newly diagnosed breast cancer in a public medical complex and a private breast clinic within one year were included. Patient delay was considered positive, if the interval between the detection of the first symptom by the patient and the first visit to a health care provider took longer than one month. Delay in diagnosis was defined as the period of more than one week between the first medical visit for the symptoms and the diagnosis of breast cancer. Following the confirmed diagnosis of breast malignancy, if the medical treatment was initiated later than one week, treatment delay had occurred. The potential reasons for patient, diagnosis and treatment delay according to the patients’ reports were also recorded.Results: Overall, 385 patients were included of whom 52.7% were recruited from the public hospitals and 47.3% from a private clinic. The prevalence of patient delay, diagnosis delay and treatment delay were 31.7%, 17.9% and 28.3%, respectively. Patient delay was significantly more common among patients with lower socio-economic status and those recruited from the public hospitals. All the patients with diagnosis delay were in the group recruited from the public hospitals.Conclusions: Gaps between women of different socio-economic levels of the society need to be addressed in order to decrease patient, diagnosis and treatment delay.

Speech and Language Delay

Science.gov (United States)

... OTC Relief for Diarrhea Home Diseases and Conditions Speech and Language Delay Condition Speech and Language Delay Share Print Table of Contents1. ... Treatment6. Everyday Life7. Questions8. Resources What is a speech and language delay? A speech and language delay ...

'Hesitant compliers': Qualitative analysis of concerned fully-vaccinating parents.

Science.gov (United States)

Enkel, Stephanie L; Attwell, Katie; Snelling, Thomas L; Christian, Hayley E

2017-10-11

Some parents are hesitant about vaccines and yet still vaccinate their children. Vaccine behaviours are not fixed and parents who are concerned but nonetheless adherent to standard schedules could switch to an unconventional schedule, delaying or cherry-picking vaccines. There is a need to better understand vaccine hesitancy in specific contexts, acknowledging cultural and geographical variation, to ensure interventions targeting hesitancy are well directed and received. To identify the behaviours, knowledge and attitudes of 'hesitant compliers' in Perth, Western Australia, nine one-on-one in-depth interviews were conducted with vaccinating parents of children (vaccination as important for themselves and their community, despite their limited knowledge of vaccine preventable diseases. Parents reported concerns about potential side effects, and worried about the safety of the measles-mumps-rubella (MMR) and seasonal influenza vaccines. Concerned about the role of anti-vaccination information in the community, some sought to isolate themselves from parents who did not vaccinate, although others were concerned that this could entrench non-vaccinators' behaviours. Parents' views were all underlaid by two pivotal 'vaccine-related events' that had occurred in the community: the severe injury of a baby from seasonal influenza vaccination in 2010, and the death of a baby from whooping cough in 2015. Parents interpreted pivotal vaccine-related events in the community as requiring them to take personal responsibility for vaccine decisions. Their reports of continued vaccine fears (evident in international studies in recent decades) demonstrate that vaccine scares have long lasting effects. With vaccine rates high and stable, current strategies appear to be have little impact on addressing parental vaccine concerns. Further research is required to determine the prevalence of hesitancy amongst vaccinating parents and identify critical points for intervention. Copyright © 2017

Beta-delayed proton emission in neutron-deficient lanthanide isotopes

International Nuclear Information System (INIS)

Wilmarth, P.A.

1988-01-01

Forty-two β-delayed proton precursors with 56≤Z≤71 and 63≤N≤83 were produced in heavy-ion reactions at the Lawrence Berkeley Laboratory SuperHILAC and their radioactive decay properties studied at the on-line mass separation facility OASIS. Twenty-five isotopes and eight delayed proton branches were identified for the first time. Delayed proton energy spectra and proton coincident γ-ray and x-ray spectra were measured for all precursors. In a few cases, proton branching ratios were also determined. The precursor mass numbers were determined by the separator, while the proton coincident x-ray energies provided unambiguous Z identifications. The proton coincident γ-ray intensities were used to extract final state branching ratios. Proton emission from ground and isomeric states was observed in many cases. The majority of the delayed proton spectra exhibited the smooth bell-shaped distribution expected for heavy mass precursors. The experimental results were compared to statistical model calculations using standard parameter sets. Calculations using Nilsson model/RPA β-strength functions were found to reproduce the spectral shapes and branching ratios better than calculations using either constant or gross theory β-strength functions. Precursor half-life predictions from the Nilsson model/RPA β-strength functions were also in better agreement with the measured half-lives than were gross theory predictions. The ratios of positron coincident proton intensities to total proton intensities were used to determine Q/sub EC/-B/sub p/ values for several precursors near N=82. The statistical model calculations were not able to reproduce the experimental results for N=81 precursors. 154 refs., 82 figs., 19 tabs

CAREGIVER'S DEPRESSIVE SYMPTOMS AND YOUNG CHILDREN'S SOCIOEMOTIONAL DEVELOPMENT DELAYS: A CROSS-SECTIONAL STUDY IN POOR RURAL AREAS OF CHINA.

Science.gov (United States)

Wei, Qianwei; Zhang, Cuihong; Zhang, Jingxu; Luo, Shusheng; Wang, Xiaoli

2018-03-01

Poverty and its associated factors put people at risk for depression. The aims of this study were to describe the prevalence of depressive symptoms (DS) of primary caregivers and socioemotional development (SED) delays of young children in poor rural areas of China, and to explore the association between them. Cross-sectional data of 2,664 children aged 3 to 35 months and their primary caregivers were used for analysis. Characteristics of the child, caregiver, and family were collected through face-to-face caregiver interviews. DS were assessed by the Zung Self-Rating Depression Scale (W.W. Zung, 1965, as cited in World Health Organization, ), and SED was evaluated by the Ages and Stage Questionnaires: Social-Emotional (J. Squires, D. Bricker, & L. Potter, 1997). The χ 2 test, stratification analysis, and logistic regression analyses were used to explore the association. Among the caregivers, 40.3% (95% confidence interval [CI] [38.4, 42.1]), reported DS. Caregivers who were male, older and ethnic minorities as well as had a low level of education, a low family income, or more children were more likely to have DS. Of the children, 24.4% (95% CI [22.8, 26.0]) were recognized with SED delays. Older children displayed more delays than did younger children, but no significant differences between males and females were found. SED delays were significantly associated with mother outmigrating, male caregivers, older age, ethnic minorities, and low education or families with a single parent, low-income, and having more children. Caregivers having DS, odds ratio (OR) = 2.40, 95% CI [1.99, 2.88], was a significant predictor of increased odds of SED delays; other factors were single-parent family, OR = 1.99, 95% CI [1.37, 2.89], inadequate care, OR = 1.69, 95% CI [1.30, 2.21], physical punishment, OR = 1.61, 95% CI [1.33, 1.95], ethnic minorities, OR = 1.41, 95% CI [1.17, 1.71], and child age in months, OR = 1.03, 95% CI [1.02, 1.04], according to the logistic regression

Advanced Quadrupole Ion Trap Instrumentation for Low Level Vehicle Emissions Measurements

International Nuclear Information System (INIS)

McLuckey, S.A.

1997-01-01

Quadrupole ion trap mass spectrometry has been evaluated for its potential use in vehicle emissions measurements in vehicle test facilities as an analyzer for the top 15 compounds contributing to smog generation. A variety of ionization methods were explored including ion trap in situ chemical ionization, atmospheric sampling glow discharge ionization, and nitric oxide chemical ionization in a glow discharge ionization source coupled with anion trap mass spectrometer. Emphasis was placed on the determination of hydrocarbons and oxygenated hydrocarbons at parts per million to parts per billion levels. Ion trap in situ water chemical ionization and atmospheric sampling glow discharge ionization were both shown to be amendable to the analysis of arenes, alcohols, aldehydes and, to some degree, alkenes. Atmospheric sampling glow discharge also generated molecular ions of methy-t-butyl ether (MTBE). Neither of these ionization methods, however, were found to generate diagnostic ions for the alkanes. Nitric oxide chemical ionization, on the other hand, was found to yield diagnostic ions for alkanes, alkenes, arenes, alcohols, aldehydes, and MTBE. The ability to measure a variety of hydrocarbons present at roughly 15 parts per billion at measurement rates of 3 Hz was demonstrated. All of the ions with potential to serve as parent ions in a tandem mass spectrometry experiment were found to yield parent-to-product conversion efficiencies greater than 75%. The flexibility afforded to the ion trap by use of tailored wave-forms applied to the end-caps allows parallel monitoring schemes to be devised that provide many of the advantages of tandem mass spectrometry without major loss in measurement rate. A large loss in measurement rate would ordinarily result from the use of conventional tandem mass spectrometry experiments carried out in series for a large number of targeted components. These results have demonstrated that the ion trap has an excellent combination of

Stress and coping of parents caring for a child with mitochondrial disease.

Science.gov (United States)

Senger, Brenda A; Ward, Linda D; Barbosa-Leiker, Celestina; Bindler, Ruth C

2016-02-01

Mitochondrial disease comprises a group of rare, genetic, life-limiting, neurodegenerative disorders known to affect children. Little is known about disease-related challenges, parental stress, and coping when caring for a child with a mitochondrial disease. This study explored disease-related characteristics and parental stressors and coping behaviors related to caring for a child with mitochondrial disease. Internet surveys were posted on known mitochondrial disease websites for parent completion. Surveys included demographic items and two questionnaires: Coping Inventory for Parents (CHIP) and Pediatric Inventory for Parents (PIP). Descriptive data were collected and correlations used to determine relationships between parenting stress, coping, and demographic variables. The majority of participants (n=231) were mothers (95%) of children with mitochondrial disease around the age of 10 years (M=9.85). On average, children had 6 organs involved (M=6.02) and saw 7 different specialists (M=7.49); 61% were hospitalized in the past year. Significant correlations (pstress and parent age, parent income, parent education, child age, child age at diagnosis, presence of developmental delays, number of hospitalizations, number of medical visits, number of organs involved, and number of specialists seen. Significant correlations were also found between parenting stress and coping behaviors such as family integration, social support and understanding health care. The ability to identify disease-related challenges, stressors, and coping strategies in parents of children with mitochondrial disease is novel and can assist nurses to provide disease-sensitive, family-focused care and improve child health outcomes. Copyright © 2015 Elsevier Inc. All rights reserved.

Energetic heavy ions accelerate differentiation in the descendants of irradiated normal human diploid fibroblasts

International Nuclear Information System (INIS)

Hamada, Nobuyuki; Hara, Takamitsu; Funayama, Tomoo; Sakashita, Tetsuya; Kobayashi, Yasuhiko

2008-01-01

Ionizing radiation-induced genomic instability has been demonstrated in a variety of endpoints such as delayed reproductive death, chromosome instability and mutations, which occurs in the progeny of survivors many generations after the initial insult. Dependence of these effects on the linear energy transfer (LET) of the radiation is incompletely characterized; however, our previous work has shown that delayed reductions in clonogenicity can be most pronounced at LET of 108 keV/μm. To gain insight into potential cellular mechanisms involved in LET-dependent delayed loss of clonogenicity, we investigated morphological changes in colonies arising from normal human diploid fibroblasts exposed to γ-rays or energetic carbon ions (108 keV/μm). Exposure of confluent cultures to carbon ions was 4-fold more effective at inactivating cellular clonogenic potential and produced more abortive colonies containing reduced number of cells per colony than γ-rays. Second, colonies were assessed for clonal morphotypic heterogeneity. The yield of differentiated cells was elevated in a dose- and LET-dependent fashion in clonogenic colonies, whereas differentiated cells predominated to a comparable extent irrespective of radiation type or dose in abortive colonies. The incidence of giant or multinucleated cells was also increased but much less frequent than that of differentiated cells. Collectively, our results indicate that carbon ions facilitate differentiation more effectively than γ-rays as a major response in the progeny of irradiated fibroblasts. Accelerated differentiation may account, at least in part, for dose- and LET-dependent delayed loss of clonogenicity in normal human diploid cells, and could be a defensive mechanism that minimizes further expansion of aberrant cells

Theoretical study of the mode of the mass-selective nonstable axial output ions from the nonlinear trap

International Nuclear Information System (INIS)

Sudakov, M.Yu.

2000-01-01

One studied theoretically the mode of mass-selective unstable output of ions from three-dimensional quadrupole ion trap. One developed a method represent coordinates of ions per one period of supplying HF voltage with regard to nonlinear distortions of quadrupole potential. One derived equation for an envelope of ion oscillations in the form of motion equation of mass point in the efficient force field. One explained the effect of output delay of ions at presence of the field negative even harmonics. One proved that the positive even distortions of quadrupole potential favored realization of that mode and studied the dynamics of ions in the course of output [ru

Ramathibodi Language Development Questionnaire: A Newly Developed Screening Tool for Detection of Delayed Language Development in Children Aged 18-30 Months.

Science.gov (United States)

Chuthapisith, Jariya; Wantanakorn, Pornchanok; Roongpraiwan, Rawiwan

2015-08-01

To develop a parental questionnaire for screening children with delayed language development in primary care settings. Ramathibodi Language Development (RLD) questionnaire was developed and completed by groups of 40 typically developing children age 18 to 30 months old and 30 children with delayed language development. The mean score was significantly lower in the delay language group (6.7 ± 1.9), comparing with the typically developing group (9.6 ± 0.7). The optimal ROC curve cut-off score was 8 with corresponding sensitivity and specificity were 98% and 72%, respectively. The corresponding area under the curve was 0.96 (95% CI = 0.92-0.99). The RLD questionnaire was the promising language developmental screening instrument that easily utilized in well-child examination settings.

Synchronization of delayed systems in the presence of delay time modulation

International Nuclear Information System (INIS)

Kye, Won-Ho; Choi, Muhan; Kim, Myung-Woon; Lee, Soo-Young; Rim, Sunghwan; Kim, Chil-Min; Park, Young-Jai

2004-01-01

We investigate synchronization in the presence of delay time modulation for application to communication. We have observed that the robust synchronization is established by a common delay signal and its threshold is presented using Lyapunov exponents analysis. The influence of the delay time modulation in chaotic oscillators is also discussed

Parental Attitudes and Beliefs Regarding the Nine-Valent Human Papillomavirus Vaccine.

Science.gov (United States)

Fontenot, Holly B; Domush, Vanessa; Zimet, Gregory D

2015-12-01

The purpose of the study was to explore parents' attitudes and beliefs about the nine-valent human papillomavirus vaccine (HPV9). Online focus groups were conducted in January, 2015. The U.S. national sample of parents was recruited to four groups: (1) two groups of parents of HPV unvaccinated daughters aged 9-12 years and (2) two groups of parents of vaccinated daughters aged 11-17 years. Participants were 43 parents of vaccinated daughters and 38 parents of unvaccinated daughters. Results indicated low and variable levels of knowledge about HPV, related cancers, and vaccination (e.g., parents unaware vaccine is recommended for boys). Parents were encouraged that HPV9 covered more types, and many said they want the "better" vaccine. Parents of unvaccinated girls wondered whether they should delay vaccination until HPV9 was available, whereas parents of vaccinated girls wondered whether their daughters could be revaccinated with HPV9. Concerns were related to adverse reactions and side effects, whether another new vaccine will be released after HPV9, HPV mutation (i.e., will HPV types change over time--thereby necessitating multiple vaccines?), and cost. Physician recommendation was identified as the most important facilitator of vaccination, with participants wanting providers to exhibit high levels of confidence in and knowledge about HPV vaccines. Last, parents also viewed the prospective idea of a 2-dose HPV9 vaccine as positive. HPV9 recently became available in the United States and has the potential to offer greater cancer prevention if widespread acceptance and uptake occur. Understanding parental perceptions and questions about HPV9 will be important for clinical messaging about this vaccine. Copyright © 2015 Society for Adolescent Health and Medicine. Published by Elsevier Inc. All rights reserved.

Adolescents with a diagnosis of anorexia nervosa: parents' experience of recognition and deciding to seek help.

Science.gov (United States)

Thomson, Samuel; Marriott, Michael; Telford, Katherine; Law, Hou; McLaughlin, Jo; Sayal, Kapil

2014-01-01

Adolescents with anorexia nervosa rarely present themselves as having a problem and are usually reliant on parents to recognise the problem and facilitate help-seeking. This study aimed to investigate parents' experiences of recognising that their child had an eating problem and deciding to seek help. A qualitative study with interpretative phenomenological analysis applied to semi-structured interviews with eight parents of adolescents with a diagnosis of anorexia nervosa. Parents commonly attributed early signs of anorexia nervosa to normal adolescent development and they expected weight loss to be short-lived. As parents' suspicions grew, close monitoring exposing their child's secretive attempts to lose weight and the use of internet searches aided parental recognition of the problem. They avoided using the term anorexia as it made the problem seem 'real'. Following serial unsuccessful attempts to effect change, parental fear for their child's life triggered a desire for professional help. Parents require early advice and support to confirm their suspicions that their child might have anorexia nervosa. Since parents commonly approach the internet for guidance, improving awareness of useful and accurate websites could reduce delays in help-seeking.

Parental age and child growth and development: child health check-up data.

Science.gov (United States)

Iwayama, Mariko; Kira, Ryutaro; Kinukawa, Naoko; Sakai, Yasunari; Torisu, Hiroyuki; Sanefuji, Masafumi; Ishizaki, Yoshito; Nose, Yoshiaki; Matsumoto, Toshimichi; Hara, Toshiro

2011-10-01

The aim of the present study was to determine whether parental age has any influence on child health. Well-baby check-up data at 1 month and at 12 months of age were used. The trends of parental age in association with growth measurements, incidence of physical and developmental abnormalities, occurrence of low birthweight, and maternal history of spontaneous abortion were analyzed. Associations between increasing paternal age and incidence of psychomotor developmental delay at 12 months, increasing paternal and maternal age and increasing birthweight, and increasing parental age and higher incidence of history of spontaneous abortion were found. The incidence of low-birthweight infants was significantly decreased with increasing paternal age. Not only increasing maternal age but also increasing paternal age have influences on child development and growth in the general population. © 2011 The Authors. Pediatrics International © 2011 Japan Pediatric Society.

Chaos synchronization in time-delayed systems with parameter mismatches and variable delay times

International Nuclear Information System (INIS)

Shahverdiev, E.M.; Nuriev, R.A.; Hashimov, R.H.; Shore, K.A.

2004-06-01

We investigate synchronization between two undirectionally linearly coupled chaotic nonidentical time-delayed systems and show that parameter mismatches are of crucial importance to achieve synchronization. We establish that independent of the relation between the delay time in the coupled systems and the coupling delay time, only retarded synchronization with the coupling delay time is obtained. We show that with parameter mismatch or without it neither complete nor anticipating synchronization occurs. We derive existence and stability conditions for the retarded synchronization manifold. We demonstrate our approach using examples of the Ikeda and Mackey Glass models. Also for the first time we investigate chaos synchronization in time-delayed systems with variable delay time and find both existence and sufficient stability conditions for the retarded synchronization manifold with the coupling-delay lag time. (author)

Parenting Stress through the Lens of Different Clinical Groups: a Systematic Review & Meta-Analysis

Science.gov (United States)

Mendez, Lucybel; Graziano, Paulo A.; Bagner, Daniel M.

2017-01-01

Research has demonstrated an association between parenting stress and child behavior problems, and suggested levels of parenting stress are higher among parents of children at risk for behavior problems, such as those with autism and developmental delay (ASD/DD). The goal of the present study was to conduct a systematic review of parenting stress and child behavior problems among different clinical groups (i.e., ASD/DD, chronic illness, with or at-risk for behavioral and/or mood disorders). We also examined demographic and methodological variables as moderators and differences in overall levels of parenting stress between the clinical groups. This systematic review documents a link between parenting stress and child behavior problems with an emphasis on externalizing behavior. One-hundred thirty-three studies were included for quantitative analysis. Parenting stress was more strongly related to child externalizing (weighted ES r = 0.57, d = 1.39) than internalizing (weighted ES r = 0.37, d = 0.79) problems. Moderation analyses indicated that the association between parenting stress and behavior problems was stronger among studies which had mostly male and clinic-recruited samples. Overall, parenting stress levels were higher for parents of children with ASD/DD compared to parents of children from other clinical groups. Findings document the association between parenting stress and child behavior problems and highlight the importance of assessing parenting stress as part of routine care and throughout behavioral intervention programs, especially for groups of children at high risk for behavior problems, such as children with ASD/DD, in order to identify support for both the parent(s) and child. PMID:28555335

Parenting Perfectionism and Parental Adjustment

OpenAIRE

Lee, Meghan A.; Schoppe-Sullivan, Sarah J.; Kamp Dush, Claire M.

2012-01-01

The parental role is expected to be one of the most gratifying and rewarding roles in life. As expectations of parenting become ever higher, the implications of parenting perfectionism for parental adjustment warrant investigation. Using longitudinal data from 182 couples, this study examined the associations between societal- and self-oriented parenting perfectionism and new mothers’ and fathers’ parenting self-efficacy, stress, and satisfaction. For mothers, societal-oriented parenting perf...

Stress proliferation across generations? Examining the relationship between parental incarceration and childhood health.

Science.gov (United States)

Turney, Kristin

2014-09-01

Stress proliferation theory suggests that parental incarceration may have deleterious intergenerational health consequences. In this study, I use data from the 2011-2012 National Survey of Children's Health (NSCH) to estimate the relationship between parental incarceration and children's fair or poor overall health, a range of physical and mental health conditions, activity limitations, and chronic school absence. Descriptive statistics show that children of incarcerated parents are a vulnerable population who experience disadvantages across an array of health outcomes. After adjusting for demographic, socioeconomic, and familial characteristics, I find that parental incarceration is independently associated with learning disabilities, attention deficit disorder and attention deficit hyperactivity disorder, behavioral or conduct problems, developmental delays, and speech or language problems. Taken together, results suggest that children's health disadvantages are an overlooked and unintended consequence of mass incarceration and that incarceration, given its unequal distribution across the population, may have implications for population-level racial-ethnic and social class inequalities in children's health. © American Sociological Association 2014.

Theory of the l-state population of Rydberg states formed in ion-solid collisions

International Nuclear Information System (INIS)

Kemmler, J.; Burgdoerfer, J.; Reinhold, C.O.

1991-01-01

The experimentally observed high-l-state population of ions excited in ion-solid interactions differs sharply from l-state populations produced in ion-atom collisions. We have studied the population dynamics of electronic excitation and transport within the framework of a classical transport theory for O 2+ (2-MeV/u) ions traversing C foils. The resulting delayed-photon-emission intensities are found to be in very good agreement with experiment. Initial phase-space conditions have been obtained from both classical-trajectory Monte Carlo calculations and random initial distributions. We find evidence that the very-high-l-state populations produced in ion-solid collisions are the result of a diffusion to high-l states under the influence of multiple scattering in the bulk of the solid

Dependence of the cutoff in lithium plasma harmonics on the delay between the prepulse and the main pulse

International Nuclear Information System (INIS)

Suzuki, M; Baba, M; Kuroda, H; Ganeev, R A; Bom, L B Elouga; Ozaki, T

2012-01-01

We demonstrated the generation of the 43rd harmonic at the wavelength of 18.49 nm (67 eV photon energy) by using laser-ablation lithium plasma irradiated by a Ti:sapphire laser pulse. We found that for low-Z material, such as lithium, the cutoff energy depends strongly on the delay time between the prepulse and the main pulse, due to rapid recombination. As a result, the maximum cutoff energy was obtained at a relatively short delay of 24 ns. From the theoretical cutoff rule and hydrodynamic simulations, we show that these harmonics were generated from singly charged lithium ions. (paper)

Classic conditioning in aged rabbits: delay, trace, and long-delay conditioning.

Science.gov (United States)

Solomon, P R; Groccia-Ellison, M E

1996-06-01

Young (0.5 years) and aged (2+, 3+, and 4+ years) rabbits underwent acquisition of the classically conditioned nictitating membrane response in a delay (500-ms conditioned stimulus [CS], 400-ms interstimulus interval [ISI]), long-delay (1,000-ms CS, 900-ms ISI), or trace (500-ms CS, 400-ms stimulus-free period) paradigm. Collapsing across age groups, there is a general tendency for animals to acquire trace conditioning more slowly than delay conditioning. Collapsing across conditioning paradigms, there is a general tendency for aged animals to acquire more slowly than younger animals. Of greater significance, however, are the age differences in the different conditioning paradigms. In the delay and long-delay paradigms, significant conditioning deficits first appeared in the 4(+)-year-old group. In the trace conditioning paradigm, significant conditioning deficits became apparent in the 2(+)-year-old animals.

Detection of fission products in carbon dioxide by instantaneous ion collection

International Nuclear Information System (INIS)

Le Meur, R.; Lorin, A.

1968-01-01

This report describes a fission product detector with instantaneous electric collection, capable of analyzing carbon dioxide up to a pressure of 60 bars and at a temperature of 200 C. In contrast to delayed collection detectors, this apparatus makes it possible to collect rubidium and cesium ions as soon as they are formed; this avoids losses due to recombination. The detector has been tested with a fission product source made up of a uranium oxide sample subjected to a neutron flux. The activity of the ions collected as a function of an electric field has been measured for different parameters: pressure, temperature, CO 2 gas flow rate, and the volume of the ion-formation chamber. The sensitivity of this apparatus is compared to that of other fission product detectors. For a low volume-flow rate, e.g. 100 cm 3 sec -1 , its sensitivity for krypton 88 is better than that of a delayed collection detector. An apparatus of this type could be used as a can rupture detector on a reactor with a large number of channels, with a low gas sampling rate per channel. The equipment will be included in the can rupture detector installations in the Fessenheim reactor. (authors) [fr

RISK FACTORS OF DELAYS OF CHILD PHYSICAL DEVELOPMENT

Directory of Open Access Journals (Sweden)

T.I. Kaganova

2008-01-01

Full Text Available Research targeted studying risk factors for delays physical development of children (n = 70 aged 7–11 years. Control group was comprised of 30 children of normal height of the same age. Physical development was evaluated by centile method using regional and international standards, studying data of life and disease anamnesis, family anamnesis, living conditions. Children had their thyroid glands studied ultrasonically. Blood levels of calcium, phosphor, magnesium, ferrum, zinc were identified by photometry method for some children in both groups. Correlation analysis makes it possible to state risk factors of children dwarfism: low educational status of parents, child height figures at the age of 1 and 3 years, calcium and phosphor blood levels, as well as thyroid hypo plasy.Key words: dwarfism, children, risk factors, calcium deficit.

The Impact of Short-Term Video Games on Performance among Children with Developmental Delays: A Randomized Controlled Trial

Science.gov (United States)

Hsieh, Ru-Lan; Lee, Wen-Chung; Lin, Jui-Hsiang

2016-01-01

This prospective, randomized controlled study investigated the effects of short-term interactive video game playing among children with developmental delays participating in traditional rehabilitation treatment at a rehabilitation clinic. One hundred and one boys and 46 girls with a mean age of 5.8 years (range: 3 to 12 years) were enrolled in this study. All patients were confirmed to suffer from developmental delays, and were participating in traditional rehabilitation treatment. Children participated in two periods of 4 weeks each, group A being offered intervention of eight 30-minute sessions of interactive video games in the first period, and group B in the second, in addition to the traditional rehabilitation treatment. The physical, psychosocial, and total health of the children was periodically assessed using the parent-reported Pediatric Quality of Life Inventory-Generic Core Scales (PedsQL); and the children’s upper extremity and physical function, transfer and basic mobility, sports and physical functioning, and global functioning were assessed using the Pediatric Outcomes Data Collection Instrument. Parental impact was evaluated using the PedsQL-Family Impact Module for family function, PedsQL-Health Satisfaction questionnaire for parents’ satisfaction with their children’s care and World Health Organization-Quality of Life-Brief Version for quality of life. Compared with the baseline, significant improvements of physical function were observed in both groups (5.6 ± 19.5, p = 0.013; 4.7 ± 13.8, p = 0.009) during the intervention periods. No significant improvement of psychosocial health, functional performance, or family impact was observed in children with developmental delays. Short-term interactive video game play in conjunction with traditional rehabilitation treatment improved the physical health of children with developmental delays. Trial Registration: ClinicalTrials.gov NCT02184715 PMID:26983099

Global synchronization criteria with channel time-delay for chaotic time-delay system

International Nuclear Information System (INIS)

Sun Jitao

2004-01-01

Based on the Lyapunov stabilization theory, matrix measure, and linear matrix inequality (LMIs), this paper studies the chaos synchronization of time-delay system using the unidirectional linear error feedback coupling with time-delay. Some generic conditions of chaos synchronization with time-delay in the transmission channel is established. The chaotic Chua's circuit is used for illustration, where the coupling parameters are determined according to the criteria under which the global chaos synchronization of the time-delay coupled systems is achieved

Delayed minocycline but not delayed mild hypothermia protects against embolic stroke

Directory of Open Access Journals (Sweden)

Noor Raza

2002-04-01

Full Text Available Abstract Background Inflammatory reactions occurring in the brain after ischemia may contribute to secondary damage. In the present study, effects of minocycline, an anti-inflammatory agent, alone or in combination with mild hypothermia on focal embolic cerebral ischemia have been examined. Methods Focal ischemic injury was induced by embolizing a preformed clot into the middle cerebral artery (MCA. Infarction volume was measured at 48 h after the injury. Mortality was also recorded. Results Delayed administration of minocycline alone or delayed minocycline plus delayed mild hypothermia reduced the infarction volume significantly. However, delayed mild hypothermia alone was not protective and delayed mild hypothermia in combination with minocycline did not show any additive effect. Conclusions These results suggest that minocycline is beneficial in focal ischemic brain injury, and the lack of the enhanced neuroprotection may be due to the brief exposure to hypothermia.

Parenting children with down syndrome: An analysis of parenting styles, parenting dimensions, and parental stress.

Science.gov (United States)

Phillips, B Allyson; Conners, Frances; Curtner-Smith, Mary Elizabeth

2017-09-01

Effective parenting is vital for a child's development. Although much work has been conducted on parenting typically developing children, little work has examined parenting children with Down syndrome. The purpose of the current study was to compare the parenting styles and dimensions in mothers of children with DS and mothers of TD children. Thirty-five mothers of children with DS and 47 mothers of TD children completed questionnaires about parenting, parental stress, child behavior problems, and child executive function. We found that mothers of children with DS use an authoritative parenting style less and a permissive parenting style more than mothers of TD children. Additionally, we found that mothers of children with DS use reasoning/induction and verbal hostility less and ignoring misbehavior more than mothers of TD children. All of these differences, except for those of reasoning/induction, were at least partially accounted for by the higher levels of parental stress in the DS group. Parenting interventions should be focused on reducing parental stress and training mothers to parent under stress in an effort to improve parenting techniques, which would, in theory, improve long-term child outcomes for children with DS. Copyright © 2017 Elsevier Ltd. All rights reserved.

Adaptive Skills, Behavior Problems, and Parenting Stress in Mothers of Boys with Fragile X Syndrome

Science.gov (United States)

Sarimski, Klaus

2010-01-01

The relationship of temperament, atypical behaviors, and adaptive behavior of young boys with Fragile X syndrome on mothers' parenting stress was analyzed. Twenty-six boys with Fragile X syndrome (30-88 months of age) participated. The overall development of the participants was significantly delayed with a specific profile of adaptive behaviors…

Parental views on otitis media: systematic review of qualitative studies.

Science.gov (United States)

Chando, Shingisai; Young, Christian; Craig, Jonathan C; Gunasekera, Hasantha; Tong, Allison

2016-10-01

This study aims to describe parental experiences and perspectives of caring for a child with otitis media. We conducted a systematic review of qualitative studies on parental perspectives on caring for a child with otitis media. We searched electronic databases to July 2015. Seventeen studies involving 284 participants from six countries were included. We identified seven themes: diminishing competency (guilt over failure to identify symptoms, helpless and despairing, fear of complications, disempowered and dismissed); disrupting life schedules (disturbing sleep, interfering with work, burden on family); social isolation (stigma and judgement, sick consciousness); threatening normal development (delaying growth milestones, impairing interpersonal skills, impeding education); taking ownership (recognising symptoms, diagnostic closure, working the system, protecting against physical trauma, contingency planning); valuing support (needing respite, depending on community, clinician validation); and cherishing health (relief with treatment success, inspiring resilience). The additional medical responsibilities and anxieties of parents caring for a child with otitis media, often discounted by clinicians, can be disempowering and disruptive. Chronicity can raise doubt about treatment efficacy and parental competency, and fears regarding their child's development. Care that fosters parental confidence and addresses their concerns about the child's development may improve treatment outcomes for children with otitis media. • Otitis media is a leading cause of conductive hearing loss in children. • Parental perception of the treatment burden of otitis media can potentially affect their confidence and ability to care for their child. What is New: • We identified five themes to reflect parental perspectives: diminishing competency, disrupting life schedules, social isolation, threatening normal development, taking ownership, valuing support, and cherishing health. �

'Inconvenient biology:' advantages and disadvantages of first-time parenting after age 40 using in vitro fertilization.

Science.gov (United States)

Mac Dougall, K; Beyene, Y; Nachtigall, R D

2012-04-01

As ages at first birth have steadily risen in the industrial west over the last several decades, the phenomenon of 'delayed childbearing' has come under research scrutiny by demographers, medical specialists and social scientists. In this study, we specifically explore the perceived advantages and disadvantages of postponed conception as well as participants' retrospective opinions on the 'optimal age' for parenting. To this end, we examined a cohort purposely chosen to epitomize delayed childbearing, i.e. men and women who used IVF to conceive at the very end of their reproductive capability. In-depth qualitative interviews were conducted between 2009 and 2011 with 46 couples and 15 individual self-selected US women and men who had used IVF to conceive their first child when the woman was aged 40 or older at the time of delivery. Although the demographics of this cohort were consistent with others who use IVF in the USA, their median income was 3-4 times higher than that of the average US family, which may bias their largely positive parenting experiences. Most women and men believed that childbearing later in life resulted in advantages for themselves and their families. These included having established careers with financial security and career-time flexibility, enhanced emotional preparedness, committed co-parenting relationships and a positive overall family experience. The main disadvantage was the unexpected difficulty in conceiving that culminated in the use of IVF and resulted in a smaller family than desired, although many expressed feeling 'lucky' to have children at all. Other disadvantages were lack of energy for parenting, less available lifetime to spend with children and anticipated stigma as older parents. These disadvantages appear to have influenced conception and parenting experiences so that in hindsight the majority of participants identified the optimal age for first-time parenting as 5-10 years earlier than they had conceived. This age

Delayed puberty in girls

Science.gov (United States)

... sexual development - girls; Pubertal delay - girls; Constitutional delayed puberty ... In most cases of delayed puberty, growth changes just begin later than usual, sometimes called a late bloomer. Once puberty begins, it progresses normally. This pattern runs ...

Exotic phenomena in collisions of heavy ions

International Nuclear Information System (INIS)

Soff, G.; Schramm, S.; Reus, T. de; Mehler, G.; Reinhardt, J.; Mueller, B.; Greiner, W.; Mueller, U.

1985-08-01

To exemplify current theoretical investigations we discuss three different topics. After a presentation of the underlying theoretical framework for ionization processes we will sketch the possibility to employ delta-electron emission as a clock to measure nuclear reaction times in intermediate energy collisions of very heavy ions. Besides the phenomenon of vacuum decay into a new twofold negatively charged stable vacuum ground state, electron excitation in heavy ion collisions may be employed for the determination of delay and deceleration times on the nuclear time scale, i.e. offering an atomic clock, operating in the range 10 -21 -10 -24 s. In deep-inelastic heavy ion collisions this provides a test for classical nuclear reaction models. In collisions at intermediate energies an independent measurement of the deceleration time is of interest for comparison, e.g., with the results of the pion bremsstrahlung model. After that we investigate the influence of one or more pockets in the ion scattering potential on the energy distribution of emitted positrons within a quantum mechanical framework. Finally we very briefly consider some phenomenological corrections to the Dirac equation and its consequences on electron binding energies in heavy and superheavy atoms. (orig./HSI)

Delayed Puberty (For Teens)

Science.gov (United States)

... Safe Videos for Educators Search English Español Delayed Puberty KidsHealth / For Teens / Delayed Puberty What's in this ... wonder if there's anything wrong. What Is Delayed Puberty? Puberty is the time when your body grows ...

Parents' Translations of Child Gesture Facilitate Word Learning in Children with Autism, Down Syndrome and Typical Development.

Science.gov (United States)

Dimitrova, Nevena; Özçalışkan, Şeyda; Adamson, Lauren B

2016-01-01

Typically-developing (TD) children frequently refer to objects uniquely in gesture. Parents translate these gestures into words, facilitating children's acquisition of these words (Goldin-Meadow et al. in Dev Sci 10(6):778-785, 2007). We ask whether this pattern holds for children with autism (AU) and with Down syndrome (DS) who show delayed vocabulary development. We observed 23 children with AU, 23 with DS, and 23 TD children with their parents over a year. Children used gestures to indicate objects before labeling them and parents translated their gestures into words. Importantly, children benefited from this input, acquiring more words for the translated gestures than the not translated ones. Results highlight the role contingent parental input to child gesture plays in language development of children with developmental disorders.

Do preterm infants with a birth weight ≤1250 g born to single-parent families have poorer neurodevelopmental outcomes at age 3 than those born to two-parent families?

Science.gov (United States)

Lodha, Abhay; Lakhani, Jahan; Ediger, Krystyna; Tang, Selphee; Lodha, Arijit; Gandhi, Vardhil; Creighton, Dianne

2018-05-08

Investigate neurodevelopmental outcomes at 3 years corrected age in infants with a birth weight ≤1250 g born to single parents. Infants born between 1995 and 2010 with a birth weight ≤1250 g were considered eligible. Primary outcome was neurodevelopmental impairment; considered present if a child had any of the following: cerebral palsy, cognitive delay, visual impairment, or deafness/neurosensory hearing impairment. Univariate and multivariate analyses were performed. A total of 1900 infants were eligible for inclusion. Follow-up data were available for 1395; 88 were born to a single parent. Infants in the single-parent group had higher mortality (18% vs. 11%, p = 0.009), IQ ≥1 SD below the mean (40% vs. 21%, p = 0.001) and any neurodevelopmental impairment (47% vs. 29%, p = 0.003). Single-parent family status, maternal education, bronchopulmonary dysplasia and severe neurological injury were significant predictors of intellectual impairment at 3 years corrected age. Preterm infants with a birth weight ≤1250 g born to single parents at birth have poorer intellectual functioning at 3 years corrected age.

Time-of-flight measurements of heavy ions using Si PIN diodes

Energy Technology Data Exchange (ETDEWEB)

Strekalovsky, A. O., E-mail: alex.strek@bk.ru; Kamanin, D. V. [Joint Institute for Nuclear Research (Russian Federation); Pyatkov, Yu. V. [National Nuclear Research University MEPhI (Moscow Engineering Physics Institute) (Russian Federation); Kondratyev, N. A.; Zhuchko, V. E. [Joint Institute for Nuclear Research (Russian Federation); Ilić, S. [University of Novi Sad (Serbia); Alexandrov, A. A.; Alexandrova, I. A. [Joint Institute for Nuclear Research (Russian Federation); Jacobs, N. [University of Stellenbosch, Faculty of Military Science, Military Academy (South Africa); Kuznetsova, E. A.; Mishinsky, G. V.; Strekalovsky, O. V. [Joint Institute for Nuclear Research (Russian Federation)

2016-12-15

A new off-line timing method for PIN diode signals is presented which allows the plasma delay effect to be suppressed. Velocities of heavy ions measured by the new method are in good agreement within a wide range of masses and energies with velocities measured by time stamp detectors based on microchannel plates.

Parent-child interaction: Does parental language matter?

Science.gov (United States)

Menashe, Atara; Atzaba-Poria, Naama

2016-11-01

Although parental language and behaviour have been widely investigated, few studies have examined their unique and interactive contribution to the parent-child relationship. The current study explores how parental behaviour (sensitivity and non-intrusiveness) and the use of parental language (exploring and control languages) correlate with parent-child dyadic mutuality. Specifically, we investigated the following questions: (1) 'Is parental language associated with parent-child dyadic mutuality above and beyond parental behaviour?' (2) 'Does parental language moderate the links between parental behaviour and the parent-child dyadic mutuality?' (3) 'Do these differences vary between mothers and fathers?' The sample included 65 children (M age  = 1.97 years, SD = 0.86) and their parents. We observed parental behaviour, parent-child dyadic mutuality, and the type of parental language used during videotaped in-home observations. The results indicated that parental language and behaviours are distinct components of the parent-child interaction. Parents who used higher levels of exploring language showed higher levels of parent-child dyadic mutuality, even when accounting for parental behaviour. Use of controlling language, however, was not found to be related to the parent-child dyadic mutuality. Different moderation models were found for mothers and fathers. These results highlight the need to distinguish parental language and behaviour when assessing their contribution to the parent-child relationship. © 2016 The British Psychological Society.

Voltage-dependent ion channels in the mouse RPE: comparison with Norrie disease mice.

Science.gov (United States)

Wollmann, Guido; Lenzner, Steffen; Berger, Wolfgang; Rosenthal, Rita; Karl, Mike O; Strauss, Olaf

2006-03-01

We studied electrophysiological properties of cultured retinal pigment epithelial (RPE) cells from mouse and a mouse model for Norrie disease. Wild-type RPE cells revealed the expression of ion channels known from other species: delayed-rectifier K(+) channels composed of Kv1.3 subunits, inward rectifier K(+) channels, Ca(V)1.3 L-type Ca(2+) channels and outwardly rectifying Cl(-) channels. Expression pattern and the ion channel characteristics current density, blocker sensitivity, kinetics and voltage-dependence were compared in cells from wild-type and Norrie mice. Although no significant differences were observed, our study provides a base for future studies on ion channel function and dysfunction in transgenic mouse models.

Probing peptide fragment ion structures by combining sustained off-resonance collision-induced dissociation and gas-phase H/D exchange (SORI-HDX) in Fourier transform ion-cyclotron resonance (FT-ICR) instruments.

Science.gov (United States)

Somogyi, Arpád

2008-12-01

The usefulness of gas-phase H/D exchange is demonstrated to probe heterogeneous fragment and parent ion populations. Singly and multiply protonated peptides/proteins were fragmented by using sustained off-resonance irradiation collision-induced dissociation (SORI-CID). The fragments and the surviving precursor ions then all undergo H/D exchange in the gas-phase with either D(2)O or CD(3)OD under the same experimental conditions. Usually, 10 to 60 s of reaction time is adequate to monitor characteristic differences in the H/D exchange kinetic rates. These differences are then correlated to isomeric ion structures. The SORI-HDX method can be used to rapidly test fragment ion structures and provides useful insights into peptide fragmentation mechanisms.

Stability of 99Tcsup(m)-DTPA injection: effect of delay after preparation, dilution, generator oxidant, air and oxygen

International Nuclear Information System (INIS)

Sampson, C.B.; Keegan, J.

1985-01-01

99 Tcsup(m)-DTPA injection is widely used in different activity concentrations and the parent solution may require dilution to achieve the correct activity and dose volume. The stability was studied after dilution of six makes of commercially available DTPA kits and it has been demonstrated that levels of free pertechnetate may reach as high as 95%. It has also been demonstrated that levels are increased by subdivision of the parent solution into vials containing air or high quantities of oxygen, by reconstitution with generator eluate containing oxidant, and by delay between preparation and injection into patients. Out of six makes tested only two were stable over a wide variety of conditions. (author)

Reward acts as a signal to control delay-period activity in delayed-response tasks.

Science.gov (United States)

Ichihara-Takeda, Satoe; Takeda, Kazuyoshi; Funahashi, Shintaro

2010-03-31

Prefrontal delay-period activity represents a neural mechanism for the active maintenance of information and needs to be controlled by some signal to appropriately operate working memory. To examine whether reward-delivery acts as this signal, the effects of delay-period activity in response to unexpected reward-delivery were examined by analyzing single-neuron activity recorded in the primate dorsolateral prefrontal cortex. Among neurons that showed delay-period activity, 34% showed inhibition of this activity in response to unexpected reward-delivery. The delay-period activity of these neurons was affected by the expectation of reward-delivery. The strength of the reward signal in controlling the delay-period activity is related to the strength of the effect of reward information on the delay-period activity. These results indicate that reward-delivery acts as a signal to control delay-period activity.

Delay-dependent exponential stability of cellular neural networks with time-varying delays

International Nuclear Information System (INIS)

Zhang Qiang; Wei Xiaopeng; Xu Jin

2005-01-01

The global exponential stability of cellular neural networks (CNNs) with time-varying delays is analyzed. Two new sufficient conditions ensuring global exponential stability for delayed CNNs are obtained. The conditions presented here are related to the size of delay. The stability results improve the earlier publications. Two examples are given to demonstrate the effectiveness of the obtained results

Ion distributions in the Earth's foreshock upstream from the bow shock

Science.gov (United States)

Fuselier, S. A.

1995-01-01

A variety of suprathermal and energetic ion distributions are found upstream from shocks. Some distributions, such as field-aligned beams, are generated directly at the shock either through reflection processes or through leakage from the hotter downstream region. Other distributions, such as intermediate distributions, evolve from these parent distributions through wave-particle interactions. This paper reviews our current understanding of the creation and evolution of suprathermal distributions at shocks. Examples of suprathermal ion distributions are taken from observations at the Earth's bow shock. Particular emphasis is placed on the creation of field-aligned beams and specularly reflected ion distributions and on the evolution of these distributions in the Earth's ion foreshock. However, the results from this heavily studied region are applicable to interplanetary shocks, bow shocks at other planets, and comets.

Plasma effects for heavy ions in implanted silicon detectors

International Nuclear Information System (INIS)

Aiello, S.; Anzalone, A.; Campisi, M.G.; Cardella, G.; Cavallaro, Sl.; Filippo, E. De; Geraci, E.; Geraci, M.; Guazzoni, P.; Manno, M.C. Iacono; Lanzalone, G.; Lanzano, G.; Nigro, S. Lo; Pagano, A.; Papa, M.; Pirrone, S.; Politi, G.; Porto, F.; Rizzo, F.; Sambataro, S.; Sperduto, M.L.; Sutera, C.; Zetta, L.

1999-01-01

Plasma effects for heavy ions in implanted silicon detectors have been investigated for different detector characteristics as a function of type and energy of the detected particles. A new approach is presented and used to reproduce the effect of the plasma delay in the timing performances. The results are in good agreement with the present data and with previous measurements found in the literature

Confinement in a cryogenic Penning trap of highest charge state ions from EBIT

International Nuclear Information System (INIS)

Schneider, D.

1994-01-01

The retrapping of highly charged Xe 44+ and Th 68+,72+ ions extracted from an open-quotes Electron Beam Ion Trapclose quotes (EBIT) is demonstrated after injection of the ions into RETRAP, a cryogenic Penning trap (up to 6 Tesla magnetic field) currently with an open cylinder design. Ion extraction in a short pulse (5-20 μsec) from EBIT, essential for efficient retrapping, is employed. The ions are slowed down upon entering a deceleration tube mounted above the trap within the magnetic field. The potential is then rapidly (100 ns) decreased, enabling low energy ions to enter the trap. Capture efficiencies up to 25% are observed via detection of the delayed ion release pulse with a detector below the trap. Signal voltages induced in a tuned circuit due to single and multiple ions have been observed by tuning the ion resonant axial oscillation frequencies for different ions. Results from transporting and retrapping of the ions, as well as their detection, are described and the trapping efficiency is discussed, The motivation for these studies is to cool the trapped very highly charged ions to low temperatures (< 4 K) in order to perform ultrahigh resolution precision spectroscopy, collision studies at ultra low energies and to observe phase transitions in Coulomb clusters of highly charged ions

Self-regulated compliance in preschoolers with autism spectrum disorder: The role of temperament and parental disciplinary style.

Science.gov (United States)

Ostfeld-Etzion, Sharon; Feldman, Ruth; Hirschler-Guttenberg, Yael; Laor, Nathaniel; Golan, Ofer

2016-10-01

Regulatory difficulties are common in children with autism spectrum disorder. This study focused on an important aspect of self-regulation-the ability to willingly comply with frustrating demands of socialization agents, termed "self-regulated compliance." We studied compliance to parental demands in 40 preschoolers with autism spectrum disorder and 40 matched typically developing preschoolers, during separate interactions with mother and father, while engaging in two paradigms: toy pick-up and delayed gratification, which tap the "do" and "don't" aspects of self-regulated socialization at this age. Parents' disciplinary style was micro-coded from the two paradigms and child temperament was parent reported. Compared to their typically developing peers, children with autism spectrum disorder showed more noncompliance and less self-regulated compliance to parental demands and prohibitions and greater temperamental difficulties across several domains. No group differences were found in parental disciplinary style. Child self-regulated compliance was associated with parental supportive disciplinary style and with child attention focusing. Findings highlight the importance of parental supportive presence in structuring the development of socialization in children with autism spectrum disorder. Implications for parent-child emotion regulation interventions are discussed. © The Author(s) 2015.

Assessing delay discounting in mice

OpenAIRE

Mitchell, Suzanne H.

2014-01-01

Delay discounting (also intertemporal choice or impulsive choice) is the process by which delayed outcomes, such as delayed food delivery, are valued less than the same outcomes delivered immediately or with a shorter delay. This process is of interest because many psychopathologies, including substance dependence, pathological gambling, attention deficit hyperactivity disorder and conduct disorder, are characterized by heightened levels of delay discounting. Some of these disorders are herit...

Modelling delays in pharmacokinetics

International Nuclear Information System (INIS)

Farooqi, Z.H.; Lambrecht, R.M.

1990-01-01

Linear system analysis has come to form the backbone of pharmacokinetics. Natural systems usually involve time delays, thus models incorporating them would be an order closer approximation to the real world compared to those that do not. Delays may be modelled in several ways. The approach considered in this study is to have a discrete-time delay dependent rate with the delay respresenting the duration between the entry of a drug into a compartment and its release in some form (may be as a metabolite) from the compartment. Such a delay may be because of one or more of several physiological reasons, like, formation of a reservoir, slow metabolism, or receptor binding. The mathematical structure this gives rise to is a system of delay-differential equations. Examples are given of simple one and two compartment systems with drugs like bumetanide, carbamazepine, and quinolone-caffeine interaction. In these examples generally a good fit is obtained and the suggested models form a good approximation. 21 refs., 6 figs

Parent and adolescent reports of parenting when a parent has a history of depression: associations with observations of parenting.

Science.gov (United States)

Parent, Justin; Forehand, Rex; Dunbar, Jennifer P; Watson, Kelly H; Reising, Michelle M; Seehuus, Martin; Compas, Bruce E

2014-02-01

The current study examined the congruence of parent and adolescent reports of positive and negative parenting with observations of parent-adolescent interactions as the criterion measure. The role of parent and adolescent depressive symptoms in moderating the associations between adolescent or parent report and observations of parenting also was examined. Participants were 180 parents (88.9 % female) with a history of clinical depression and one of their 9-to-15 year old children (49.4 % female). Parents and adolescents reported on parenting skills and depressive symptoms, and parenting was independently observed subsequently in the same session. Findings indicated adolescent report of positive, but not negative, parenting was more congruent with observations than parent report. For negative parenting, depressive symptoms qualified the relation between the parent or adolescent report and independent observations. For parents, higher levels of depressive symptoms were associated with more congruence with observed parenting (supporting a depressive realism hypothesis) whereas an opposite trend emerged for adolescents (providing some supporting evidence for a depression-distortion hypothesis).

Comparison of Parent Report and Direct Assessment of Child Skills in Toddlers.

Science.gov (United States)

Miller, Lauren E; Perkins, Kayla A; Dai, Yael G; Fein, Deborah A

2017-09-01

There are unique challenges associated with measuring development in early childhood. Two primary sources of information are used: parent report and direct assessment. Each approach has strengths and weaknesses, particularly when used to identify and diagnose developmental delays. The present study aimed to evaluate consistency between parent report and direct assessment of child skills in toddlers with and without Autism Spectrum Disorder (ASD) across receptive language, expressive language, and fine motor domains. 109 children were evaluated at an average age of two years; data on child skills were collected via parent report and direct assessment. Children were classified into three groups (i.e., ASD, Other Developmental Disorder, or Typical Development) based on DSM-IV-TR diagnosis. Mixed design ANOVAs, with data source as a within subjects factor and diagnostic group as a between subjects factor, were used to assess agreement. Chi square tests of agreement were then used to examine correspondence at the item level. Results suggested that parent report of language and fine motor skills did not significantly differ from direct assessment, and this finding held across diagnostic groups. Item level analyses revealed that, in most cases of significant disagreement, parents reported a skill as present, but it was not seen on direct testing. Results indicate that parents are generally reliable reporters of child language and fine motor abilities in toddlerhood, even when their children have developmental disorders such as ASD. However, the fullest picture may be obtained by using both parent report and direct assessment.

Climate schools plus: An online, combined student and parent, universal drug prevention program

Directory of Open Access Journals (Sweden)

Louise K. Thornton

2018-06-01

Full Text Available Early initiation of substance use significantly increases one's risk of developing substance use dependence and mental disorders later in life. To interrupt this trajectory, effective prevention during the adolescent period is critical. Parents play a key role in preventing substance use and related harms among adolescents and parenting interventions have been identified as critical components of effective prevention programs. Despite this, there is currently no substance use prevention program targeting both students and parents that adopts online delivery to overcome barriers to implementation and sustainability. The Climate Schools Plus (CSP program was developed to meet this need. CSP is an online substance use prevention program for students and parents, based on the effective Climate Schools prevention program for students. This paper describes the development of the parent component of CSP including a literature review and results of a large scoping survey of parents of Australian high school students (n = 242. This paper also includes results of beta-testing of the developed program with relevant experts (n = 10, and parents of Australian high school students (n = 15. The CSP parent component consists of 1 a webinar which introduces shared rule ranking, 2 online modules and 3 summaries of student lessons. The parent program targets evidence-based modifiable factors associated with a delay in the onset of adolescent substance use and/or lower levels of adolescent substance use in the future; namely, rule-setting, monitoring, and modelling. To date, this is the first combined parent-student substance use prevention program to adopt an online delivery method. Keywords: Development, Prevention, Adolescent, Alcohol, Parent

Parents of children with enduring epilepsy: predictors of parenting stress and parenting

NARCIS (Netherlands)

Rodenburg, R.; Meijer, A.M.; Dekovic, M.; Aldenkamp, A.P.

2007-01-01

Objective: The goals of the work described here were (1) to predict parenting stress and parenting from stressors, resources, and parental coping behaviors in parents of children with epilepsy, and (2) to determine whether parenting stress mediates the effects of these predictors on parenting.

Parents of children with enduring epilepsy: predictors of parenting stress and parenting.

NARCIS (Netherlands)

Rodenburg, R.J.T.; Meijer, A.M.; Dekovic, M.; Aldenkamp, A.P.

2007-01-01

OBJECTIVE: The goals of the work described here were (1) to predict parenting stress and parenting from stressors, resources, and parental coping behaviors in parents of children with epilepsy, and (2) to determine whether parenting stress mediates the effects of these predictors on parenting.

Ion feedback afterpulses in FEU-130 and XP2020 photomultipliers

International Nuclear Information System (INIS)

Brudanin, V.B.; Morozov, V.A.; Morozova, N.V.

2003-01-01

Intensities and time distributions of ion feedback afterpulses are studied as a function of the difference of potentials between the photocathode and the first dynodes in FEU-130. The intensities and amplitudes of afterpulses in FEU-130 are found to be appreciably larger than in XP2020, which may limit the use of FEU-130 in some experiments with autocorrelation delayed-coincidence spectrometers

Dynamics of Neutral Cluster Growth and Cluster Ion Fragmentation for Toluene/Water, Aniline/Argon, and 4-Fluorostyrene/Argon Clusters: Covariance Mapping of the Mass Spectral Data

National Research Council Canada - National Science Library

Foltin, M

1998-01-01

.... To explore sensitivity of the parent ion/fragment ion correlation coefficient to cluster fragmentation, correlation coefficients are measured as a function of ionization photon energy as thresholds...

Parental Obesity and Early Childhood Development.

Science.gov (United States)

Yeung, Edwina H; Sundaram, Rajeshwari; Ghassabian, Akhgar; Xie, Yunlong; Buck Louis, Germaine

2017-02-01

Previous studies identified associations between maternal obesity and childhood neurodevelopment, but few examined paternal obesity despite potentially distinct genetic/epigenetic effects related to developmental programming. Upstate KIDS (2008-2010) recruited mothers from New York State (excluding New York City) at ∼4 months postpartum. Parents completed the Ages and Stages Questionnaire (ASQ) when their children were 4, 8, 12, 18, 24, 30, and 36 months of age corrected for gestation. The ASQ is validated to screen for delays in 5 developmental domains (ie, fine motor, gross motor, communication, personal-social functioning, and problem-solving ability). Analyses included 3759 singletons and 1062 nonrelated twins with ≥1 ASQs returned. Adjusted odds ratios (aORs) and 95% confidence intervals were estimated by using generalized linear mixed models accounting for maternal covariates (ie, age, race, education, insurance, marital status, parity, and pregnancy smoking). Compared with normal/underweight mothers (BMI obese mothers (26% with BMI ≥30) had increased odds of failing the fine motor domain (aOR 1.67; confidence interval 1.12-2.47). The association remained after additional adjustment for paternal BMI (1.67; 1.11-2.52). Paternal obesity (29%) was associated with increased risk of failing the personal-social domain (1.75; 1.13-2.71), albeit attenuated after adjustment for maternal obesity (aOR 1.71; 1.08-2.70). Children whose parents both had BMI ≥35 were likely to additionally fail the problem-solving domain (2.93; 1.09-7.85). Findings suggest that maternal and paternal obesity are each associated with specific delays in early childhood development, emphasizing the importance of family information when screening child development. Copyright © 2017 by the American Academy of Pediatrics.

Investigation of mechanism of anode plasma formation in ion diode with dielectric anode

International Nuclear Information System (INIS)

Pushkarev, A.

2015-01-01

The results of investigation of the anode plasma formation in a diode with a passive anode in magnetic insulation mode are presented. The experiments have been conducted using the BIPPAB-450 ion accelerator (350–400 kV, 6–8 kA, 80 ns) with a focusing conical diode with B r external magnetic field (a barrel diode). For analysis of plasma formation at the anode and the distribution of the ions beam energy density, infrared imaging diagnostics (spatial resolution of 1–2 mm) is used. For analysis of the ion beam composition, time-of-flight diagnostics (temporal resolution of 1 ns) were used. Our studies have shown that when the magnetic induction in the A-C gap is much larger than the critical value, the ion beam energy density is close to the one-dimensional Child-Langmuir limit on the entire working surface of the diode. Formation of anode plasma takes place only by the flashover of the dielectric anode surface. In this mode, the ion beam consists primarily of singly ionized carbon ions, and the delay of the start of formation of the anode plasma is 10–15 ns. By reducing the magnetic induction in the A-C gap to a value close to the critical one, the ion beam energy density is 3–6 times higher than that calculated by the one-dimensional Child-Langmuir limit, but the energy density of the ion beam is non-uniform in cross-section. In this mode, the anode plasma formation occurs due to ionization of the anode material with accelerated electrons. In this mode, also, the delay in the start of the formation of the anode plasma is much smaller and the degree of ionization of carbon ions is higher. In all modes occurred effective suppression of the electronic component of the total current, and the diode impedance was 20–30 times higher than the values calculated for the mode without magnetic insulation of the electrons. The divergence of the ion beam was 4.5°–6°

REASONS FOR PATIENT DELAYS & HEALTH SYSTEM DELAYS FOR TUBERCULOSIS IN SOUTH INDIA

Directory of Open Access Journals (Sweden)

Kapil Goel

2011-12-01

Full Text Available Background: Globally, the burden of Tuberculosis is escalating. Early diagnosis and prompt initiation of tuberculosis treatment is essential for an effective tuberculosis control programme. Objectives: To study the self reported reasons for patient and health system (diagnosis & treatment delays in Tuberculosis patients. Methods: A community based cross sectional study was conducted among 98 new sputum positive TB cases aged > 15 years registered under RNTCP from Oct 2006 to June 2007 & receiving treatment under DOTS in Udupi taluk by interviewing them. Results: Total 98 patients were recruited and 68% were males. Out of 17 patients with patient delays, 82% felt that their symptoms were not severe, 71% felt that patient delay was due to lack of awareness and 71% did not take it seriously. Out of 86 patients with health system delays, 82.6% of patients mentioned that doctor has not advised for sputum examination, 76.7% of patients told that they first consulted a private doctor, 21% of them mentioned that doctor was unaware to diagnose TB. Conclusion: Symptoms not severe is the main reason for the patient delay and doctor didn’t advise for sputum examination is the main reason for health system delays.

Delaying sexual debut amongst out-of-school youth in rural southwest Uganda.

Science.gov (United States)

Nobelius, Ann-Maree; Kalina, Bessie; Pool, Robert; Whitworth, Jimmy; Chesters, Janice; Power, Robert

2010-08-01

This paper focuses on 'sexual debut' among out-of-school youth in Masaka District, Uganda, factors influencing its timing and assistance young people feel they need to delay sexual initiation. Data were drawn from a sexual health needs assessment using applied anthropological techniques with young people aged 13-19 years. Parents, guardians and community leaders were also consulted. All participants felt that young people begin their sexual lives too early. Young men feel under pressure from friends and older men to prove their masculinity. Most delay further activity after debut and want assistance to resist the pressure. Young women's debut after physical maturation prompts 'pestering' for sex from boys and men who offer gifts. After debut, young women remain sexually active but believe younger women need assistance to resist pressure. Programmes are needed to help young people achieve these goals. Structurally, the community needs to develop means of preventing men from pestering young women for sex and of redeveloping both the social role and pathway to marriage for young women who are marrying later than is traditional.

Parent and Adolescent Reports of Parenting When a Parent Has a History of Depression: Associations with Observations of Parenting

Science.gov (United States)

Parent, Justin; Forehand, Rex; Dunbar, Jennifer P.; Watson, Kelly H.; Reising, Michelle M.; Seehuus, Martin; Compas, Bruce E.

2013-01-01

The current study examined the congruence of parent and adolescent reports of positive and negative parenting with observations of parent-adolescent interactions as the criterion measure. The role of parent and adolescent depressive symptoms in moderating the associations between adolescent or parent report and observations of parenting also was examined. Participants were 180 parents (88.9% female) with a history of clinical depression and one of their 9-to-15 year old children (49.4% female). Parents and adolescents reported on parenting skills and depressive symptoms, and parenting was independently observed subsequently in the same session. Findings indicated adolescent report of positive, but not negative, parenting was more congruent with observations than parent report. For negative parenting, depressive symptoms qualified the relation between the parent or adolescent report and independent observations. For parents, higher levels of depressive symptoms were associated with more congruence with observed parenting (supporting a depressive realism hypothesis) whereas an opposite trend emerged for adolescents (providing some supporting evidence for a depression-distortion hypothesis). PMID:23851629

Effect of ion beam irradiation of fresh-keeping of strawberry

International Nuclear Information System (INIS)

Lei Qing; Huang Min; Wu Ling; Mo Yan; Du Xiaoying; Xie Yan; Wang Yan; Gao Peng; Kang Ju

2011-01-01

Effects of ion beam irradiation on strawberry quality were studied, in this study and microbial biomass, decay index, weight loss and biological index were detected. Irradiation dosage were 1.0, 2.0 and 3.0 kGy. The results showed that the irradiation decreased the number of microorganism in the strawberry and delayed the rotten speed. The soluble solide, Vc and total acid content of irradiated strawberry reduced slower than that of control. It indicated that the irradiation dosage did not affect the quality of strawberry in this study . Therefore, 2.0 ∼ 3.0 kGy of ion beam irradiation were an excellent irradiation dosage for strawberry preservation. (authors)

The relationship between sources and functions of social support and dimensions of child- and parent-related stress.

Science.gov (United States)

Guralnick, M J; Hammond, M A; Neville, B; Connor, R T

2008-12-01

In this longitudinal study, we examined the relationship between the sources and functions of social support and dimensions of child- and parent-related stress for mothers of young children with mild developmental delays. Sixty-three mothers completed assessments of stress and support at two time points. Multiple regression analyses revealed that parenting support during the early childhood period (i.e. advice on problems specific to their child and assistance with child care responsibilities), irrespective of source, consistently predicted most dimensions of parent stress assessed during the early elementary years and contributed unique variance. General support (i.e. primarily emotional support and validation) from various sources had other, less widespread effects on parental stress. The multidimensional perspective of the construct of social support that emerged suggested mechanisms mediating the relationship between support and stress and provided a framework for intervention.

Delayed orgasm and anorgasmia.

Science.gov (United States)

Jenkins, Lawrence C; Mulhall, John P

2015-11-01

Delayed orgasm/anorgasmia defined as the persistent or recurrent difficulty, delay in, or absence of attaining orgasm after sufficient sexual stimulation, which causes personal distress. Delayed orgasm and anorgasmia are associated with significant sexual dissatisfaction. A focused medical history can shed light on the potential etiologies, which include medications, penile sensation loss, endocrinopathies, penile hyperstimulation, and psychological etiologies. Unfortunately, there are no excellent pharmacotherapies for delayed orgasm/anorgasmia, and treatment revolves largely around addressing potential causative factors and psychotherapy. Copyright © 2015 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.

Delayed Referral in Children with Speech and Language Disorders for Rehabilitation Services

Directory of Open Access Journals (Sweden)

Roshanak Vameghi

2015-03-01

Full Text Available Objectives: Speech and language development is one of the main aspects of evolution in humans and is one of the most complex brain functions such that it is referred to as one of the highest cortical functions such as thinking, reading and writing. Speech and language disorders are considered as a major public health problem because they cause many secondary complications in the childhood and adulthood period which affect one’s socioeconomic status overall. Methods: This study was conducted in two phases. The first phase was to identify all potential factors influencing delay in referral of children with speech and language disorders for receiving rehabilitation services, based on literature as well as the families’ and experts’ points of view. In the second phase of the study which was designed in a case-control manner, actual factors influencing the time of referral were compared between two groups of participants. Results: Parental knowledge of their children's problems related to speech and language had no significant impact on the on-time referral for treatment for children with speech and language disorders. After the child definite diagnosis of speech and language disorders, parents’ information about the consequences of speech and language disorders, had a significant influence on early referral for speech and language pathology services. Discussion: In this study family structure plays an important role in the early identification of children with developmental disorders. Two-parent families had access to more resources than single-parent families. In addition, single-parent families may be more involved in the work and business of life.

Parental Monitoring, Parent-Adolescent Communication, and Adolescents' Trust in Their Parents in China.

Directory of Open Access Journals (Sweden)

Liuhua Ying

Full Text Available Trust is an important aspect of interpersonal relationships, but little is known about adolescents' interpersonal trust. The aim of the present study was to examine the associations among parental monitoring, parent-adolescent communication, and adolescents' trust in their parents in China.Data in this study were collected as part of the cross-sectional study of children in China. 3349 adolescents (female 48.6%, age range of 12-15 years were randomly selected from 35 secondary schools in April, 2009 and administered to the Adolescent Interpersonal Trust Scale, the Parental Monitoring Scale, and the Parent-Adolescent Communication Scale.Adolescents' trust in their parents was positively related to parental monitoring and parent-adolescent communication. Furthermore, parent-adolescent communication mediated the association between parental monitoring and adolescents' trust in their parents. The mediation model fit data of both genders and three age groups equally well.Parental monitoring and parent-adolescent communication play an importance role in fostering adolescents' trust in their parents.

A Parent-to-Parent Program in Taiwan

Science.gov (United States)

Liu, Kae

2018-01-01

Parent-to-parent programs provide emotional and informational support to parents of children with special needs by matching trained and experienced parents with parents needing support. This study examined the implementation and effects of a Parent-to-Parent Program in Taiwan that supported 3 families of youngsters with special needs. Based on the…

Development of a collision induced dissociation ion cyclotron resonance spectrometer

International Nuclear Information System (INIS)

Fan, Y.N.

1982-01-01

A transient analysis ion cyclotron resonance spectrometer is developed to investigate the phenomena of collision induced dissociation. The Fourier transform method and the modified maximum entropy spectral analysis or covariance least square method are implemented in measuring the mass spectrum of the ion ensemble. The Fourier transform method can be used in quantitative analysis while the maximum entropy method as developed here is useful for qualitative analysis only. The cyclotron resonance frequency, relaxation time constant, and the relative ion population are observable from the Fourier transform spectrum. These parameters are very important in investigating collision induced dissociation process and other topics in gas phase chemistry. The ion cyclotron resonance spectrometer is not only developed to study fragments and their abundance from a parent ion, but also to determine the threshold energy and reaction cross section in the collision induced dissociation process. When hard sphere model is used in the ion-molecule collision, the radius of acetone ion measured from the reactive cross section is 2.2 angstrom which is very close to the physical dimension of acetone. The threshold energy for acetone ion in collision induced dissociation process is 1.8 eV which is similar to the result obtained by the angle-resolved mass spectrometer

A randomised group comparison controlled trial of 'preschoolers with autism': a parent education and skills training intervention for young children with autistic disorder.

Science.gov (United States)

Tonge, Bruce; Brereton, Avril; Kiomall, Melissa; Mackinnon, Andrew; Rinehart, Nicole J

2014-02-01

To determine the effect of parent education on adaptive behaviour, autism symptoms and cognitive/language skills of young children with autistic disorder. A randomised group comparison design involving a parent education and counselling intervention and a parent education and behaviour management intervention to control for parent skills training and a control sample. Two rural and two metropolitan regions were randomly allocated to intervention groups (n = 70) or control (n = 35). Parents from autism assessment services in the intervention regions were randomly allocated to parent education and behaviour management (n = 35) or parent education and counselling (n = 35). Parent education and behaviour management resulted in significant improvement in adaptive behaviour and autism symptoms at 6 months follow-up for children with greater delays in adaptive behaviour. Parent education and behaviour management was superior to parent education and counselling. We conclude that a 20-week parent education programme including skills training for parents of young children with autistic disorder provides significant improvements in child adaptive behaviour and symptoms of autism for low-functioning children.

Comparative study of occupational performance in children with global developmental delay at 3 and 5 years old

Directory of Open Access Journals (Sweden)

Patrícia Isabel Candeias Fernandes

2016-07-01

Full Text Available Objectives: This study aims to compare the occupational performance of children with global developmental delay, inserted in SNIPI, and children with typical development, at 3 and 5 years of age, and to verify what functional areas children with global developmental delay feature more difficulties. Method: This is a comparative descriptive study including a sample of 40 participants, and 20 show Typical Development with 20 presenting diagnosis of Global Development Delay. These two groups were divided into two age subgroups of 10 children (aged 3 to 5 years. Results: The Inventory Pediatric Evaluation of Disability was filled out by parents and the results show that occupational performance of children with developmental delay, inserted in SNIPI is lower than those with typical development, with 3 and 5 years old, in the areas personal, mobility and socialization autonomy. Conclusion: The publication of more studies related to the practice of occupational therapy in Portugal is crucial, thus contributing to the knowledge of professionals and students in this scientific area. In addition, more and more evidence-based practice is an approach adopted by health professionals, including occupational therapists, and to this end it is extremely important to carry out newer studies locally in Portugal.

Parental Power and Adolescents' Parental Identification.

Science.gov (United States)

Acock, Alan C.; Yang, Wen Shan

1984-01-01

Combines McDonald's social power of parental identification with sex-linked models of parental identification to account for the identification of daughters (N=199) and sons (N=147) with their parents. Found that because of a halo effect, a gain in identification with one parent is not at the other parent's expense. (JAC)

Delay-dependent stability of neural networks of neutral type with time delay in the leakage term

International Nuclear Information System (INIS)

Li, Xiaodi; Cao, Jinde

2010-01-01

This paper studies the global asymptotic stability of neural networks of neutral type with mixed delays. The mixed delays include constant delay in the leakage term (i.e. 'leakage delay'), time-varying delays and continuously distributed delays. Based on the topological degree theory, Lyapunov method and linear matrix inequality (LMI) approach, some sufficient conditions are derived ensuring the existence, uniqueness and global asymptotic stability of the equilibrium point, which are dependent on both the discrete and distributed time delays. These conditions are expressed in terms of LMI and can be easily checked by the MATLAB LMI toolbox. Even if there is no leakage delay, the obtained results are less restrictive than some recent works. It can be applied to neural networks of neutral type with activation functions without assuming their boundedness, monotonicity or differentiability. Moreover, the differentiability of the time-varying delay in the non-neutral term is removed. Finally, two numerical examples are given to show the effectiveness of the proposed method

Foster Parents' Involvement in Authoritative Parenting and Interest in Future Parenting Training

Science.gov (United States)

King, Keith A.; Kraemer, Linda K.; Bernard, Amy L.; Vidourek, Rebecca A.

2007-01-01

We surveyed 191 Southwest Ohio foster parents regarding their involvement in authoritative parenting and interest for additional parenting education. Our results showed that most respondents reported using an authoritative parenting style and were interested in receiving future training. Involvement in authoritative parenting differed…

‘Inconvenient biology:’ advantages and disadvantages of first-time parenting after age 40 using in vitro fertilization

Science.gov (United States)

Mac Dougall, K.; Beyene, Y.; Nachtigall, R.D.

2012-01-01

BACKGROUND As ages at first birth have steadily risen in the industrial west over the last several decades, the phenomenon of ‘delayed childbearing’ has come under research scrutiny by demographers, medical specialists and social scientists. In this study, we specifically explore the perceived advantages and disadvantages of postponed conception as well as participants’ retrospective opinions on the ‘optimal age’ for parenting. METHODS To this end, we examined a cohort purposely chosen to epitomize delayed childbearing, i.e. men and women who used IVF to conceive at the very end of their reproductive capability. In-depth qualitative interviews were conducted between 2009 and 2011 with 46 couples and 15 individual self-selected US women and men who had used IVF to conceive their first child when the woman was aged 40 or older at the time of delivery. Although the demographics of this cohort were consistent with others who use IVF in the USA, their median income was 3–4 times higher than that of the average US family, which may bias their largely positive parenting experiences. RESULTS Most women and men believed that childbearing later in life resulted in advantages for themselves and their families. These included having established careers with financial security and career-time flexibility, enhanced emotional preparedness, committed co-parenting relationships and a positive overall family experience. The main disadvantage was the unexpected difficulty in conceiving that culminated in the use of IVF and resulted in a smaller family than desired, although many expressed feeling ‘lucky’ to have children at all. Other disadvantages were lack of energy for parenting, less available lifetime to spend with children and anticipated stigma as older parents. CONCLUSIONS These disadvantages appear to have influenced conception and parenting experiences so that in hindsight the majority of participants identified the optimal age for first-time parenting as 5�

Parenting

Science.gov (United States)

... parents, people are always ready to offer advice. Parenting tips, parents' survival guides, dos, don'ts, shoulds ... right" way to be a good parent. Good parenting includes Keeping your child safe Showing affection and ...

American Dream Delayed

DEFF Research Database (Denmark)

Khorunzhina, Natalia; Miller, Robert A.

This paper investigates the delay in homeownership and a subsequent reduction in homeownership rate observed over the past decades. We focus on the delay in giving birth to children and increased labor market participation as contributing factors to homeownership dynamics for prime-age female hou...

Delayed Orgasm and Anorgasmia

OpenAIRE

Jenkins, Lawrence C.; Mulhall, John P.

2015-01-01

Delayed orgasm/anorgasmia defined as the persistent or recurrent difficulty, delay in, or absence of attaining orgasm after sufficient sexual stimulation, which causes personal distress. Delayed orgasm and anorgasmia are associated with significant sexual dissatisfaction. A focused medical history can shed light on the potential etiologies; which include: medications, penile sensation loss, endocrinopathies, penile hyperstimulation and psychological etiologies, amongst others. Unfortunately, ...

Parenting self-efficacy, parenting stress and child behaviour before and after a parenting programme.

Science.gov (United States)

Bloomfield, Linda; Kendall, Sally

2012-10-01

To explore whether changes in parenting self-efficacy after attending a parenting programme are related to changes in parenting stress and child behaviour. Adverse parenting is a risk factor in the development of a range of health and behavioural problems in childhood and is predictive of poor adult outcomes. Strategies for supporting parents are recognised as an effective way to improve the health, well-being and development of children. Parenting is influenced by many factors including the behaviour and characteristics of the child, the health and psychological well-being of the parent and the contextual influences of stress and support. Parenting difficulties are a major source of stress for parents, and parenting self-efficacy has been shown to be an important buffer against parenting stress. In all, 63 parents who had a child under the age of 10 years took part in the research. Of those, 58 returned completed measures of parenting self-efficacy, parenting stress and child behaviour at the start of a parenting programme and 37 at three-month follow-up. Improvements in parenting self-efficacy and parenting stress were found at follow-up, but there was less evidence for improvements in child behaviour. The findings clearly suggest a relationship between parenting self-efficacy and parenting stress; parents who are feeling less efficacious experience higher levels of stress, whereas greater parenting self-efficacy is related to less stress. This study adds to the evidence that parent outcomes may be a more reliable measure of programme effectiveness than child outcomes at least in the short term.

Derivation and computation of discrete-delay and continuous-delay SDEs in mathematical biology.

Science.gov (United States)

Allen, Edward J

2014-06-01

Stochastic versions of several discrete-delay and continuous-delay differential equations, useful in mathematical biology, are derived from basic principles carefully taking into account the demographic, environmental, or physiological randomness in the dynamic processes. In particular, stochastic delay differential equation (SDDE) models are derived and studied for Nicholson's blowflies equation, Hutchinson's equation, an SIS epidemic model with delay, bacteria/phage dynamics, and glucose/insulin levels. Computational methods for approximating the SDDE models are described. Comparisons between computational solutions of the SDDEs and independently formulated Monte Carlo calculations support the accuracy of the derivations and of the computational methods.

Attosecond Delays in Molecular Photoionization.

Science.gov (United States)

Huppert, Martin; Jordan, Inga; Baykusheva, Denitsa; von Conta, Aaron; Wörner, Hans Jakob

2016-08-26

We report measurements of energy-dependent photoionization delays between the two outermost valence shells of N_{2}O and H_{2}O. The combination of single-shot signal referencing with the use of different metal foils to filter the attosecond pulse train enables us to extract delays from congested spectra. Remarkably large delays up to 160 as are observed in N_{2}O, whereas the delays in H_{2}O are all smaller than 50 as in the photon-energy range of 20-40 eV. These results are interpreted by developing a theory of molecular photoionization delays. The long delays measured in N_{2}O are shown to reflect the population of molecular shape resonances that trap the photoelectron for a duration of up to ∼110 as. The unstructured continua of H_{2}O result in much smaller delays at the same photon energies. Our experimental and theoretical methods make the study of molecular attosecond photoionization dynamics accessible.

Virtual unit delay for digital frequency adaptive T/4 delay phase-locked loop system

DEFF Research Database (Denmark)

Yang, Yongheng; Zhou, Keliang; Blaabjerg, Frede

2016-01-01

/processor with a fixed sampling rate considering the cost and complexity, where the number of unit delays that have been adopted should be an integer. For instance, in conventional digital control systems, a single-phase T/4 Delay Phase-Locked Loop (PLL) system takes 50 unit delays (i.e., in a 50-Hz system...... Delay PLL system should be done in its implementation. This process will result in performance degradation in the digital control system, as the exactly required number of delays is not realized. Hence, in this paper, a Virtual Unit Delay (VUD) has been proposed to address such challenges to the digital......Digital micro-controllers/processors enable the cost-effective control of grid-connected power converter systems in terms of system monitoring, signal processing (e.g., grid synchronization), control (e.g., grid current and voltage control), etc. Normally, the control is implemented in a micro-controller...

Parental Origin of Interstitial Duplications at 15q11.2-q13.3 in Schizophrenia and Neurodevelopmental Disorders

DEFF Research Database (Denmark)

Isles, Anthony R; Ingason, Andrés; Lowther, Chelsea

2016-01-01

Duplications at 15q11.2-q13.3 overlapping the Prader-Willi/Angelman syndrome (PWS/AS) region have been associated with developmental delay (DD), autism spectrum disorder (ASD) and schizophrenia (SZ). Due to presence of imprinted genes within the region, the parental origin of these duplications m...

Information transfer via implicit encoding with delay time modulation in a time-delay system

Energy Technology Data Exchange (ETDEWEB)

Kye, Won-Ho, E-mail: whkye@kipo.go.kr [Korean Intellectual Property Office, Government Complex Daejeon Building 4, 189, Cheongsa-ro, Seo-gu, Daejeon 302-701 (Korea, Republic of)

2012-08-20

A new encoding scheme for information transfer with modulated delay time in a time-delay system is proposed. In the scheme, the message is implicitly encoded into the modulated delay time. The information transfer rate as a function of encoding redundancy in various noise scales is presented and it is analyzed that the implicit encoding scheme (IES) has stronger resistance against channel noise than the explicit encoding scheme (EES). In addition, its advantages in terms of secure communication and feasible applications are discussed. -- Highlights: ► We propose new encoding scheme with delay time modulation. ► The message is implicitly encoded with modulated delay time. ► The proposed scheme shows stronger resistance against channel noise.

5 CFR 1651.7 - Parent or parents.

Science.gov (United States)

2010-01-01

... 5 Administrative Personnel 3 2010-01-01 2010-01-01 false Parent or parents. 1651.7 Section 1651.7 Administrative Personnel FEDERAL RETIREMENT THRIFT INVESTMENT BOARD DEATH BENEFITS § 1651.7 Parent or parents. If the account is to be paid to the participant's parent or parents under § 1651.2(a)(4), the following...

Watching proton transfer in real time: Ultrafast photoionization-induced proton transfer in phenol-ammonia complex cation.

Science.gov (United States)

Shen, Ching-Chi; Tsai, Tsung-Ting; Wu, Jun-Yi; Ho, Jr-Wei; Chen, Yi-Wei; Cheng, Po-Yuan

2017-10-28

In this paper, we give a full account of our previous work [C. C. Shen et al., J. Chem. Phys. 141, 171103 (2014)] on the study of an ultrafast photoionization-induced proton transfer (PT) reaction in the phenol-ammonia (PhOH-NH 3 ) complex using ultrafast time-resolved ion photofragmentation spectroscopy implemented by the photoionization-photofragmentation pump-probe detection scheme. Neutral PhOH-NH 3 complexes prepared in a free jet are photoionized by femtosecond 1 + 1 resonance-enhanced multiphoton ionization via the S 1 state. The evolving cations are then probed by delayed pulses that result in ion fragmentation, and the ionic dynamics is followed by measuring the parent-ion depletion as a function of the pump-probe delay time. By comparing with systems in which PT is not feasible and the steady-state ion photofragmentation spectra, we concluded that the observed temporal evolutions of the transient ion photofragmentation spectra are consistent with an intracomplex PT reaction after photoionization from the initial non-PT to the final PT structures. Our experiments revealed that PT in [PhOH-NH 3 ] + cation proceeds in two distinct steps: an initial impulsive wave-packet motion in ∼70 fs followed by a slower relaxation of about 1 ps that stabilizes the system into the final PT configuration. These results indicate that for a barrierless PT system, even though the initial PT motions are impulsive and ultrafast, the time scale to complete the reaction can be much slower and is determined by the rate of energy dissipation into other modes.

Quality of Maternal Parenting of 9-Month-Old Infants Predicts Executive Function Performance at 2 and 3 Years of Age

Directory of Open Access Journals (Sweden)

Nanhua Cheng

2018-01-01

Full Text Available Whereas the effects of maternal parenting quality during infants’ 2nd year on later executive function (EF have been studied extensively, less is known about the impact of maternal parenting quality during the 1st year. The aim of this study was to examine whether maternal parenting during infants’ 1st year predicted EF performance at 2 and 3 years of age in a Chinese sample. Data were collected from 96 mother-infant dyads (42 males when the infants were 6, 9, 25, and 38 months old. Cognitive development as a control variable was measured with the Bayley Scales of Infant Development II at 6 months. At 9 months, three aspects of maternal parenting quality (sensitivity, mind-mindedness, and encouragement of autonomy were assessed with MBQS, mind-mindedness coding system, and encouragement of autonomy coding schema within a 15-min mother–infant interaction. Three aspects of EF (working memory, inhibitory control, and delay EF were measured at 25 and 38 months with age-appropriate tasks. Hierarchical regression analysis showed that maternal mind-mindedness had a more important effect than did the encouragement of autonomy and maternal sensitivity during infants’ preverbal period. More precisely, maternal mind-mindedness at 9 months predicted inhibitory control at 2 and 3 years, and maternal encouragement of autonomy predicted performance on delay EF tasks at 3 years, maternal sensitivity had no observed effect on children’s EF. This study suggests that maternal parenting quality during the 1st year (maternal mind-mindedness and encouragement of autonomy, but not maternal sensitivity impacts later EF development.

Actividades Para Padres: A Parent Handbook (Activities for Parents: A Parent Handbook).

Science.gov (United States)

Coca, Benjamin

Thirty Mora, New Mexico parents attended a 13-session parent involvement workshop (The Mora Adventure) designed to help parents foster successful school experiences through non-school activities with their children. A parent involvement model was used as the basis of the workshop in which the parents developed more effective communication skills;…

Social Withdrawal Behaviour at One Year of Age Is Associated with Delays in Reaching Language Milestones in the EDEN Mother-Child Cohort Study.

Directory of Open Access Journals (Sweden)

Antoine Guedeney

Full Text Available The aim of the study was to examine the relationship between social withdrawal behaviour at one year and motor and language milestones.One-year old children from the EDEN French population-based birth cohort study (Study on the pre- and postnatal determinants of the child's development and prospective health Birth Cohort Study were included. Social withdrawal at one year was assessed by trained midwives using the Alarm Distress BaBy (ADBB scale. Midwives concurrently examined infants' motor and language milestones. Parents reported on child's psychomotor and language milestones, during the interview with the midwife.After adjusting for potential confounding factors, social withdrawal behaviour was significantly associated with concurrent delays in motor and language milestones assessed by the midwife or the parents.Higher scores on social withdrawal behaviour as assessed with the ADBB were associated with delays in reaching language milestones, and to a lesser extent with lower motor ability scores. Taking the contribution of social withdrawal behaviour into account may help understand the unfolding of developmental difficulties in children.

Social Withdrawal Behaviour at One Year of Age Is Associated with Delays in Reaching Language Milestones in the EDEN Mother-Child Cohort Study.

Science.gov (United States)

Guedeney, Antoine; Forhan, Anne; Larroque, Beatrice; de Agostini, Maria; Pingault, Jean-Baptiste; Heude, Barbara

2016-01-01

The aim of the study was to examine the relationship between social withdrawal behaviour at one year and motor and language milestones. One-year old children from the EDEN French population-based birth cohort study (Study on the pre- and postnatal determinants of the child's development and prospective health Birth Cohort Study) were included. Social withdrawal at one year was assessed by trained midwives using the Alarm Distress BaBy (ADBB) scale. Midwives concurrently examined infants' motor and language milestones. Parents reported on child's psychomotor and language milestones, during the interview with the midwife. After adjusting for potential confounding factors, social withdrawal behaviour was significantly associated with concurrent delays in motor and language milestones assessed by the midwife or the parents. Higher scores on social withdrawal behaviour as assessed with the ADBB were associated with delays in reaching language milestones, and to a lesser extent with lower motor ability scores. Taking the contribution of social withdrawal behaviour into account may help understand the unfolding of developmental difficulties in children.

Impulsive control of time-delay systems using delayed impulse and its application to impulsive master-slave synchronization

International Nuclear Information System (INIS)

Sun Jitao; Han Qinglong; Jiang Xiefu

2008-01-01

This Letter is concerned with impulsive control of a class of nonlinear time-delay systems. Some uniform stability criteria for the closed-loop time-delay system under delayed impulsive control are derived by using piecewise Lyapunov functions. Then the criteria are applied to impulsive master-slave synchronization of some secure communication systems with transmission delays and sample delays under delayed impulsive control. Two numerical examples are given to illustrate the effectiveness of the derived results

Associations and Costs of Parental Symptoms of Psychiatric Distress in a Multi-Diagnosis Group of Children with Special Needs

Science.gov (United States)

Thurston, S.; Paul, L.; Loney, P.; Ye, C.; Wong, M.; Browne, G.

2011-01-01

Background: Families supporting children with complex needs are significantly more distressed and economically disadvantaged than families of children without disability and delay. What is not known is the associations and costs of parental psychiatric distress within a multi-diagnosis group of special needs children. Methods: In this…

The validity of parental reports on motor skills performance level in preschool children: a comparison with a standardized motor test.

Science.gov (United States)

Zysset, Annina E; Kakebeeke, Tanja H; Messerli-Bürgy, Nadine; Meyer, Andrea H; Stülb, Kerstin; Leeger-Aschmann, Claudia S; Schmutz, Einat A; Arhab, Amar; Ferrazzini, Valentina; Kriemler, Susi; Munsch, Simone; Puder, Jardena J; Jenni, Oskar G

2018-05-01

Motor skills are interrelated with essential domains of childhood such as cognitive and social development. Thus, the evaluation of motor skills and the identification of atypical or delayed motor development is crucial in pediatric practice (e.g., during well-child visits). Parental reports on motor skills may serve as possible indicators to decide whether further assessment of a child is necessary or not. We compared parental reports on fundamental motor skills performance level (e.g., hopping, throwing), based on questions frequently asked in pediatric practice, with a standardized motor test in 389 children (46.5% girls/53.5% boys, M age = 3.8 years, SD = 0.5, range 3.0-5.0 years) from the Swiss Preschoolers' Health Study (SPLASHY). Motor skills were examined using the Zurich Neuromotor Assessment 3-5 (ZNA3-5), and parents filled in an online questionnaire on fundamental motor skills performance level. The results showed that the answers from the parental report correlated only weakly with the objectively assessed motor skills (r = .225, p skills would be desirable, the parent's report used in this study was not a valid indicator for children's fundamental motor skills. Thus, we may recommend to objectively examine motor skills in clinical practice and not to exclusively rely on parental report. What is Known: • Early assessment of motor skills in preschool children is important because motor skills are essential for the engagement in social activities and the development of cognitive abilities. Atypical or delayed motor development can be an indicator for different developmental needs or disorders. • Pediatricians frequently ask parents about the motor competences of their child during well-child visits. What is New: • The parental report on fundamental motor skills performance level used in this study was not a reliable indicator for describing motor development in the preschool age. • Standardized examinations of motor skills are

Ages & Stages Questionnaires[R], Third Edition (ASQ-3[TM]): A Parent-Completed Child-Monitoring System

Science.gov (United States)

Squires, Jane; Bricker, Diane

2009-01-01

Now enhanced and updated based on extensive user feedback and a new, unparalleled research sample of more than 12,000 children, ASQ-3 is the most accurate, cost-effective, and parent-friendly way to identify children from one month to 5 1/2 years with developmental delays. ASQ-3 offers more than any other screening system: (1) Recommended by the…

Two planar polishing methods by using FIB technique: Toward ultimate top-down delayering for failure analysis

Energy Technology Data Exchange (ETDEWEB)

Wang, D. D., E-mail: dandan.wang@globalfoundries.com; Huang, Y. M.; Tan, P. K.; Feng, H.; Low, G. R.; Yap, H. H.; He, R.; Tan, H.; Dawood, M. K.; Zhao, Y. Z.; Lam, J.; Mai, Z. H. [GLOBALFOUNDRIES Singapore Pte. Ltd, 60 Woodlands Industrial Park D Street 2, Singapore 738406 (Singapore)

2015-12-15

Presently two major limiting factors are hindering the failure analysis (FA) development during the semiconductor manufacturing process and technology improvement: (1) Impossibility of manual polishing on the edge dies due to the amenability of layer peeling off; (2) Abundant demand of multi-locations FA, especially focusing different levels of layers simultaneously. Aiming at resolving these limitations, here we demonstrate two unique high precision polishing methods by using focused ion beam (FIB) technique. One is the vertical top down chemical etching at the aimed location; the other one is the planar top down slicing. Using the FIB for delayering not only solves these problems mentioned above, but also offers significant advantages over physical planar polishing methods such as: (1) having a better control of the delayering progress, (2) enabling precisely milling at a region of interest, (3) providing the prevention of over-delayering and (4) possessing capability to capture images at the region of interest simultaneously and cut into the die directly to expose the exact failure without damaging other sections of the specimen.

Prehospital delay in acute coronary syndrome--an analysis of the components of delay

DEFF Research Database (Denmark)

Ottesen, Michael Mundt; Dixen, Ulrik; Torp-Pedersen, Christian

2004-01-01

BACKGROUND: Prompt hospital admission is essential when treating acute coronary syndrome. Delay prior to admission is unnecessarily long. Therefore, a thorough scrutiny of the influence of characteristics, circumstantial and subjective variables on elements of prehospital delay among patients...... admitted with acute coronary syndrome is warranted. METHODS: A structured interview was conducted on 250 consecutive patients admitted alive with acute coronary syndrome. RESULTS: Median prehospital, decision, physician and transportation delays were 107, 74, 25 and 22 min, respectively. Women (n=77) had...... of acute coronary syndrome among women, and thereby contributes to unnecessary long delay to treatment. The patient's prior experience and interpretation has a significant influence on behaviour....

Communication key using delay times in time-delayed chaos synchronization

International Nuclear Information System (INIS)

Kim, Chil-Min; Kye, Won-Ho; Rim, Sunghwan; Lee, Soo-Young

2004-01-01

We propose an efficient key scheme, which can generate a great number of communication keys, for communication using chaos synchronization. We have attained the keys from delay times of time-delay coupled chaotic systems. We explain the scheme and the efficiency by coupling Henon and logistic maps and illustrate them by coupling Navier-Stokes and Lorenz equations as a continuous system

Dissociation mechanism of HNIW ions investigated by chemical ionization and electron impact mass spectroscopy

Energy Technology Data Exchange (ETDEWEB)

Yang, Rongjie; Xiao, Hemiao [School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081 (China)

2006-04-15

Chemical Ionization (CI) with Collision-Induced Dissociation (CID) spectroscopy and Electron Impacting (EI) with metastable Mass analyzed Ion Kinetic Energy (MIKE) spectroscopy have been applied to study ionic dissociations of Hexanitrohexaazaisowurtzitane (HNIW). Similarities and differences between EI/MIKE and CI/CID mass spectra of HNIW were analyzed. In EI mass spectra, the ions [HNIW-n NO{sub 2}]{sup +} (n=2-5), such as the ion at m/z 347, were less frequent (1-2% relative abundance), but in CI mass spectra, these ions were very abundant. For some ions of large molar mass from HNIW, their dissociations pathways from parent ions to daughter ions were built according to CID and MIKE spectra. Molecular ions of HNIW with a protonated nitro group at five-member ring seem more stable than at six-member ring. The HNIW ions losing five of six nitro groups are very stable based on CID spectra, which agrees with some research results for thermal decomposition of HNIW in literature. (Abstract Copyright [2006], Wiley Periodicals, Inc.)

Parent and Adolescent Reports of Parenting When a Parent Has a History of Depression: Associations with Observations of Parenting

OpenAIRE

Parent, Justin; Forehand, Rex; Dunbar, Jennifer P.; Watson, Kelly H.; Reising, Michelle M.; Seehuus, Martin; Compas, Bruce E.

2014-01-01

The current study examined the congruence of parent and adolescent reports of positive and negative parenting with observations of parent-adolescent interactions as the criterion measure. The role of parent and adolescent depressive symptoms in moderating the associations between adolescent or parent report and observations of parenting also was examined. Participants were 180 parents (88.9% female) with a history of clinical depression and one of their 9-to-15 year old children (49.4% female...

Patient delay is the main cause of treatment delay in acute limb ischemia: an investigation of pre- and in-hospital time delay

DEFF Research Database (Denmark)

Londero, Louise Skovgaard; Nørgaard, Birgitte; Houlind, Kim Christian

2014-01-01

Abstract BACKGROUND: The prognosis of acute limb ischemia is severe, with amputation rates of up to 25% and in-hospital mortality of 9-15%. Delay in treatment increases the risk of major amputation and may be present at different stages, including patient delay, doctors´ delay and waiting time...... in the emergency department. It is important to identify existing problems in order to reduce time delay. The aim of this study was to collect data for patients with acute limb ischemia and to evaluate the time delay between the different events from onset of symptoms to specialist evaluation and further treatment...... (median (range)) was identified. From onset of symptoms to first contact with a doctor the time for all patients were 24 (0-1200) hours. Thirty patients needed immediate intervention. In the group of fourteen patients who had immediate operation, the median time from vascular evaluation...

Cross-sections of charge and electronic states change of particles at ion-ion and ion-molecule collisions

International Nuclear Information System (INIS)

Panov, M.N.; Afrosimov, V.V.; Basalaev, A.A.; Guschina, N.A.; Nikulin, V.K.

2006-01-01

The interactions of protons and alpha-particles with hydrocarbons are investigated. A quantum-mechanical computation of the electronic structure of all hydrocarbons from methane to butane and its fragment ions was performed in the Hartree-Fock RHF/UHF approximation using a GAMESS program (General Atomic Molecular Electron Structure System). The correlation energy was taken into account within the framework of MP2 perturbation theory. The structural parameters of the hydrocarbon molecules and their charged and neutral fragments were calculated in two cases: in the geometry of the parent molecule or of the relaxation states. The difference of the full energy of the same fragments in and out of brackets gives us the vibration excitation energies of the fragments at the moment of creation. Additional Mulliken effective charges (in electron charge units) of atoms in the fragments have been calculated. The calculations show that removing one electron from the ethane molecule without electronic excitation produced a single charged molecular ion in vibration state with binding energy of hydrogen atoms, some decimal eV. As results we obtain C 2 H 6 + and C 2 H 5 + . Additional fragmentation of hydrocarbon needs electronic excitation of produced single charged ions. Cross sections for electron capture and excitation processes in collisions between the hydrogen-like He + , B 4+ and O 7+ ions have been evaluated. The purpose of the theory within this project during the period under review was to get for the first time new data on Single-Electron Capture (SEC) and Excitation Processes (EP) in collisions of He + (1s) ions with hydrogen-like impurity ions B 4+ (1s) and O 7+ (1s) in the energy range for He + ions from 0.2 MeV to 3.0 MeV. The calculations were carried out by using the method of close-coupling equations with basis sets of eleven and ten quasimolecular two-electron states for reactions (1, 2) and (3, 4), respectively (entrance channel, seven charge transfer channels

Use of mutant-specific ion channel characteristics for risk stratification of long QT syndrome patients

DEFF Research Database (Denmark)

Jons, Christian; O-Uchi, Jin; Moss, Arthur J

2011-01-01

Inherited long QT syndrome (LQTS) is caused by mutations in ion channels that delay cardiac repolarization, increasing the risk of sudden death from ventricular arrhythmias. Currently, the risk of sudden death in individuals with LQTS is estimated from clinical parameters such as age, gender, and...

Vehicle barrier with access delay

Science.gov (United States)

Swahlan, David J; Wilke, Jason

2013-09-03

An access delay vehicle barrier for stopping unauthorized entry into secure areas by a vehicle ramming attack includes access delay features for preventing and/or delaying an adversary from defeating or compromising the barrier. A horizontally deployed barrier member can include an exterior steel casing, an interior steel reinforcing member and access delay members disposed within the casing and between the casing and the interior reinforcing member. Access delay members can include wooden structural lumber, concrete and/or polymeric members that in combination with the exterior casing and interior reinforcing member act cooperatively to impair an adversarial attach by thermal, mechanical and/or explosive tools.

Factors that influence parental vaccination decisions for adolescents, 13 to 17 years old: National Immunization Survey-Teen, 2010.

Science.gov (United States)

Dorell, Christina; Yankey, David; Kennedy, Allison; Stokley, Shannon

2013-02-01

We aim to describe factors that influence parental decisions to vaccinate their adolescents. Data from the July to December 2010 National Immunization Survey-Teen Parental Concerns Module were analyzed to determine factors that influence parental decisions to vaccinate their adolescents. Parents reported that their adolescent's health care provider recommended tetanus toxoid/tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis (Td/Tdap; 74.4%), meningococcal conjugate (MenACWY; 60.3%), and human papillomavirus (HPV; 71.3%). Vaccination coverage estimates were significantly higher among parents who reported receiving a provider recommendation: 85.2% versus 76.7% (Td/Tdap), 77.3% versus 49.7% (MenACWY), and 62.2% versus 21.5% (HPV). Compared with Td/Tdap and MenACWY, fewer HPV vaccination conversations included recommendations for vaccination. Other than health care providers, school requirements (46.1%), news coverage (31.2%), and family (31.0%) were most frequently reported influences on parental vaccination decisions. Many factors influence parental decisions to vaccinate their adolescents; one of the most important factors is the provider recommendation. Missed opportunities for vaccination persist when strong vaccination recommendations are not given or are delayed.

Parent and child usual source of care and children's receipt of health care services.

Science.gov (United States)

DeVoe, Jennifer E; Tillotson, Carrie J; Wallace, Lorraine S; Angier, Heather; Carlson, Matthew J; Gold, Rachel

2011-01-01

PURPOSE In the United States, children who have a usual source of care (USC) have better access to health care than those who do not, but little is known about how parental USC affects children's access. We examined the association between child and parent USC patterns and children's access to health care services. METHODS We undertook a secondary analysis of nationally representative, cross-sectional data from children participating in the 2002-2007 Medical Expenditure Panel Survey (n = 56,302). We assessed 10 outcome measures: insurance coverage gaps, no doctor visits in the past year, less than yearly dental visits, unmet medical and prescription needs, delayed care, problems getting care, and unmet preventive counseling needs regarding healthy eating, regular exercise, car safety devices, and bicycle helmets. RESULTS Among children, 78.6% had a USC and at least 1 parent with a USC, whereas 12.4% had a USC but no parent USC. Children with a USC but no parent USC had a higher likelihood of several unmet needs, including an insurance coverage gap (adjusted risk ratio [aRR] 1.33; 95% confidence interval [CI], 1.21-1.47), an unmet medical or prescription need (aRR 1.70; 95% CI 1.09-2.65), and no yearly dental visits (aRR 1.12; 95% CI 1.06-1.18), compared with children with a USC whose parent(s) had a USC. CONCLUSIONS Among children with a USC, having no parent USC was associated with a higher likelihood of reporting unmet needs when compared with children whose parent(s) had a USC. Policy reforms should ensure access to a USC for all family members.

Precise delay measurement through combinatorial logic

Science.gov (United States)

Burke, Gary R. (Inventor); Chen, Yuan (Inventor); Sheldon, Douglas J. (Inventor)

2010-01-01

A high resolution circuit and method for facilitating precise measurement of on-chip delays for FPGAs for reliability studies. The circuit embeds a pulse generator on an FPGA chip having one or more groups of LUTS (the "LUT delay chain"), also on-chip. The circuit also embeds a pulse width measurement circuit on-chip, and measures the duration of the generated pulse through the delay chain. The pulse width of the output pulse represents the delay through the delay chain without any I/O delay. The pulse width measurement circuit uses an additional asynchronous clock autonomous from the main clock and the FPGA propagation delay can be displayed on a hex display continuously for testing purposes.

Evaluation of a teen parent program designed to reduce child abuse and neglect and to strengthen families.

Science.gov (United States)

Marshall, E; Buckner, E; Powell, K

1991-01-01

The purpose of this study was to evaluate a teen parent program designed to increase parents' self-esteem, improve parenting skills, and increase parental knowledge about child development. Subjects (n = 30) in the program were referred from public health services. Control subjects (n = 30) were served by a local health department. Subjects were tested before and on completion of the program (or 6-9 months later for controls) using the Coopersmith Self-Esteem Inventory (SEI), the Inventory of Parents' Experiences (IPE), and the Denver Developmental Screening Test (DDST). Findings included (a) intervention subjects scored lower than control subjects on the pretesting in self-esteem (p less than 0.05), parental role satisfaction (p less than 0.05), and community support (p less than 0.0001); (b) control subjects scored lower on satisfaction with intimate relationships (p less than 0.0001); (c) at post-test, there were no statistically significant differences, and intervention subjects recorded self-esteem scores had increased to control levels; and (d) no developmental delays were detected in newborns at either pre- or post-testing. Implications of this study include (a) data support effectiveness of the program in enhancing self-esteem, maintaining satisfaction in parental role, and increasing community support for teen parents; and (b) evaluation of teen parent programs' effects should be done every 3-6 months to reduce subject attrition.

Improving Delay-Range-Dependent Stability Condition for Systems with Interval Time-Varying Delay

Directory of Open Access Journals (Sweden)

Wei Qian

2013-01-01

Full Text Available This paper discusses the delay-range-dependent stability for systems with interval time-varying delay. Through defining the new Lyapunov-Krasovskii functional and estimating the derivative of the LKF by introducing new vectors, using free matrices and reciprocally convex approach, the new delay-range-dependent stability conditions are obtained. Two well-known examples are given to illustrate the less conservatism of the proposed theoretical results.

Speech and language development in cognitively delayed children with cochlear implants.

Science.gov (United States)

Holt, Rachael Frush; Kirk, Karen Iler

2005-04-01

The primary goals of this investigation were to examine the speech and language development of deaf children with cochlear implants and mild cognitive delay and to compare their gains with those of children with cochlear implants who do not have this additional impairment. We retrospectively examined the speech and language development of 69 children with pre-lingual deafness. The experimental group consisted of 19 children with cognitive delays and no other disabilities (mean age at implantation = 38 months). The control group consisted of 50 children who did not have cognitive delays or any other identified disability. The control group was stratified by primary communication mode: half used total communication (mean age at implantation = 32 months) and the other half used oral communication (mean age at implantation = 26 months). Children were tested on a variety of standard speech and language measures and one test of auditory skill development at 6-month intervals. The results from each test were collapsed from blocks of two consecutive 6-month intervals to calculate group mean scores before implantation and at 1-year intervals after implantation. The children with cognitive delays and those without such delays demonstrated significant improvement in their speech and language skills over time on every test administered. Children with cognitive delays had significantly lower scores than typically developing children on two of the three measures of receptive and expressive language and had significantly slower rates of auditory-only sentence recognition development. Finally, there were no significant group differences in auditory skill development based on parental reports or in auditory-only or multimodal word recognition. The results suggest that deaf children with mild cognitive impairments benefit from cochlear implantation. Specifically, improvements are evident in their ability to perceive speech and in their reception and use of language. However, it may

Relaxation-Induced Memory Effect of LiFePO4 Electrodes in Li-Ion Batteries.

Science.gov (United States)

Jia, Jianfeng; Tan, Chuhao; Liu, Mengchuang; Li, De; Chen, Yong

2017-07-26

In Li-ion batteries, memory effect has been found in several commercial two-phase materials as a voltage bump and a step in the (dis)charging plateau, which delays the two-phase transition and influences the estimation of the state of charge. Although memory effect has been first discovered in olivine LiFePO 4 , the origination and dependence are still not clear and are critical for regulating the memory effect of LiFePO 4 . Herein, LiFePO 4 has been synthesized by a home-built spray drying instrument, of which the memory effect has been investigated in Li-ion batteries. For as-synthesized LiFePO 4 , the memory effect is significantly dependent on the relaxation time after phase transition. Besides, the voltage bump of memory effect is actually a delayed voltage overshooting that is overlaid at the edge of stepped (dis)charging plateau. Furthermore, we studied the kinetics of LiFePO 4 electrode with electrochemical impedance spectroscopy (EIS), which shows that the memory effect is related to the electrochemical kinetics. Thereby, the underlying mechanism has been revealed in memory effect, which would guide us to optimize two-phase electrode materials and improve Li-ion battery management systems.

Modeling of delays in PKPD: classical approaches and a tutorial for delay differential equations.

Science.gov (United States)

Koch, Gilbert; Krzyzanski, Wojciech; Pérez-Ruixo, Juan Jose; Schropp, Johannes

2014-08-01

In pharmacokinetics/pharmacodynamics (PKPD) the measured response is often delayed relative to drug administration, individuals in a population have a certain lifespan until they maturate or the change of biomarkers does not immediately affects the primary endpoint. The classical approach in PKPD is to apply transit compartment models (TCM) based on ordinary differential equations to handle such delays. However, an alternative approach to deal with delays are delay differential equations (DDE). DDEs feature additional flexibility and properties, realize more complex dynamics and can complementary be used together with TCMs. We introduce several delay based PKPD models and investigate mathematical properties of general DDE based models, which serve as subunits in order to build larger PKPD models. Finally, we review current PKPD software with respect to the implementation of DDEs for PKPD analysis.

A delay fractioning approach to global synchronization of delayed complex networks with stochastic disturbances

International Nuclear Information System (INIS)

Wang Yao; Wang Zidong; Liang Jinling

2008-01-01

In this Letter, the synchronization problem is investigated for a class of stochastic complex networks with time delays. By utilizing a new Lyapunov functional form based on the idea of 'delay fractioning', we employ the stochastic analysis techniques and the properties of Kronecker product to establish delay-dependent synchronization criteria that guarantee the globally asymptotically mean-square synchronization of the addressed delayed networks with stochastic disturbances. These sufficient conditions, which are formulated in terms of linear matrix inequalities (LMIs), can be solved efficiently by the LMI toolbox in Matlab. The main results are proved to be much less conservative and the conservatism could be reduced further as the number of delay fractioning gets bigger. A simulation example is exploited to demonstrate the advantage and applicability of the proposed result

Parental Cognitions, Parental Behavior, and the Child's Understanding of the Parent-Child Relationship.

Science.gov (United States)

Dekovic, Maja; And Others

1991-01-01

Studied the relationship of parental reasoning complexity to parental behavior during parent-child interactions, and the effect of this relationship on children's social cognitions. Results indicate that parental reasoning complexity is related to parental behaviors of restrictive control, authoritative control, and support, which, in turn, are…

A distributed delay approach for modeling delayed outcomes in pharmacokinetics and pharmacodynamics studies.

Science.gov (United States)

Hu, Shuhua; Dunlavey, Michael; Guzy, Serge; Teuscher, Nathan

2018-04-01

A distributed delay approach was proposed in this paper to model delayed outcomes in pharmacokinetics and pharmacodynamics studies. This approach was shown to be general enough to incorporate a wide array of pharmacokinetic and pharmacodynamic models as special cases including transit compartment models, effect compartment models, typical absorption models (either zero-order or first-order absorption), and a number of atypical (or irregular) absorption models (e.g., parallel first-order, mixed first-order and zero-order, inverse Gaussian, and Weibull absorption models). Real-life examples were given to demonstrate how to implement distributed delays in Phoenix ® NLME™ 8.0, and to numerically show the advantages of the distributed delay approach over the traditional methods.

COMPARISON OF ELM PULSE PROPAGATION IN THE DIII-D SOL AND DIVERTORS WITH AN ION CONVECTION MODEL

International Nuclear Information System (INIS)

FENSTERMACHER, ME; PORTER, GD; LEONARD, AW; BROOKS, NH; BOEDO, JA; COLCHIN, RJ; GRAY, DS; GROEBNER, RJ; GROTH, M; HOGAN, JT; HOLLMANN, EM; LASNIER, CJ; OSBORNE, TH; PETRIE, TW; RUDAKOV, DL; SNYDER, PB; TAKAHASHI, H; WATKINS, JG; ZENG, L; DIII-D TEAM

2003-01-01

OAK-B135 Results from dedicated ELM experiments, performed in DIII-D with fast diagnostics to measure the evolution of Type-I ELM effects in the SOL and divertor, are compared with a simple ion convection model and with initial time-dependent UEDGE simulations. Delays between ELM effects observed in the inner versus the outer divertor regions in the experiments scale, as a function of density, with the difference in ion convection time along field lines from the outer midplane to the divertor targets. The ELM perturbation was modeled as an instantaneous radially uniform increase of diffusion coefficients from the top of the pedestal to the outer SOL. The perturbation was confined to a low field side poloidal zone ± 40 o from the outer midplane. The delays in the simulations are similar to those observed in the experiments

Novel delay-distribution-dependent stability analysis for continuous-time recurrent neural networks with stochastic delay

International Nuclear Information System (INIS)

Wang Shen-Quan; Feng Jian; Zhao Qing

2012-01-01

In this paper, the problem of delay-distribution-dependent stability is investigated for continuous-time recurrent neural networks (CRNNs) with stochastic delay. Different from the common assumptions on time delays, it is assumed that the probability distribution of the delay taking values in some intervals is known a priori. By making full use of the information concerning the probability distribution of the delay and by using a tighter bounding technique (the reciprocally convex combination method), less conservative asymptotic mean-square stable sufficient conditions are derived in terms of linear matrix inequalities (LMIs). Two numerical examples show that our results are better than the existing ones. (general)

Time Delay of CGM Sensors

Science.gov (United States)

Schmelzeisen-Redeker, Günther; Schoemaker, Michael; Kirchsteiger, Harald; Freckmann, Guido; Heinemann, Lutz; del Re, Luigi

2015-01-01

Background: Continuous glucose monitoring (CGM) is a powerful tool to support the optimization of glucose control of patients with diabetes. However, CGM systems measure glucose in interstitial fluid but not in blood. Rapid changes in one compartment are not accompanied by similar changes in the other, but follow with some delay. Such time delays hamper detection of, for example, hypoglycemic events. Our aim is to discuss the causes and extent of time delays and approaches to compensate for these. Methods: CGM data were obtained in a clinical study with 37 patients with a prototype glucose sensor. The study was divided into 5 phases over 2 years. In all, 8 patients participated in 2 phases separated by 8 months. A total number of 108 CGM data sets including raw signals were used for data analysis and were processed by statistical methods to obtain estimates of the time delay. Results: Overall mean (SD) time delay of the raw signals with respect to blood glucose was 9.5 (3.7) min, median was 9 min (interquartile range 4 min). Analysis of time delays observed in the same patients separated by 8 months suggests a patient dependent delay. No significant correlation was observed between delay and anamnestic or anthropometric data. The use of a prediction algorithm reduced the delay by 4 minutes on average. Conclusions: Prediction algorithms should be used to provide real-time CGM readings more consistent with simultaneous measurements by SMBG. Patient specificity may play an important role in improving prediction quality. PMID:26243773

Delay-Dependent Guaranteed Cost Control of an Interval System with Interval Time-Varying Delay

Directory of Open Access Journals (Sweden)

Xiao Min

2009-01-01

Full Text Available This paper concerns the problem of the delay-dependent robust stability and guaranteed cost control for an interval system with time-varying delay. The interval system with matrix factorization is provided and leads to less conservative conclusions than solving a square root. The time-varying delay is assumed to belong to an interval and the derivative of the interval time-varying delay is not a restriction, which allows a fast time-varying delay; also its applicability is broad. Based on the Lyapunov-Ktasovskii approach, a delay-dependent criterion for the existence of a state feedback controller, which guarantees the closed-loop system stability, the upper bound of cost function, and disturbance attenuation lever for all admissible uncertainties as well as out perturbation, is proposed in terms of linear matrix inequalities (LMIs. The criterion is derived by free weighting matrices that can reduce the conservatism. The effectiveness has been verified in a number example and the compute results are presented to validate the proposed design method.

Delay-Dependent Control for Networked Control Systems with Large Delays

Directory of Open Access Journals (Sweden)

Yilin Wang

2013-01-01

Full Text Available We consider the problems of robust stability and control for a class of networked control systems with long-time delays. Firstly, a nonlinear discrete time model with mode-dependent time delays is proposed by converting the uncertainty of time delay into the uncertainty of parameter matrices. We consider a probabilistic case where the system is switched among different subsystems, and the probability of each subsystem being active is defined as its occurrence probability. For a switched system with a known subsystem occurrence probabilities, we give a stochastic stability criterion in terms of linear matrix inequalities (LMIs. Then, we extend the results to a more practical case where the subsystem occurrence probabilities are uncertain. Finally, a simulation example is presented to show the efficacy of the proposed method.

Quad nanosecond delay module

International Nuclear Information System (INIS)

McDonald, R.J.; Hunter, J.B.; Wozniak, G.J.

1986-04-01

Four nanosecond (ns) delay units have been designed to fit in a single-width NIM module. This module is particularly suited for use in conjunction with quad constant fraction timing discriminators (CFTDs) since it has four delay units that can be placed adjacent to the four units of the CFTD. A series of different length cables connected via DIP toggle switches provide delays of 0.60 ns in 4 ns increments. Thus, the CFTD delay can be optimized for pulses of different rise times from approx.10-100 ns. Design work for the PC board and silkscreening of the front panel were done with the MacDraw program on the Apple Mackintosh computer and printed with the Lasewriter printer. 6 refs

Do Children's Executive Functions Account for Associations Between Early Autonomy-Supportive Parenting and Achievement Through High School?

Science.gov (United States)

Bindman, Samantha W; Pomerantz, Eva M; Roisman, Glenn I

2015-08-01

This study evaluated whether the positive association between early autonomy-supportive parenting and children's subsequent achievement is mediated by children's executive functions. Using observations of mothers' parenting from the NICHD Study of Early Child Care and Youth Development ( N = 1,306), analyses revealed that mothers' autonomy support over the first 3 years of life predicted enhanced executive functions (i.e., inhibition, delay of gratification, and sustained attention) during the year prior to kindergarten and academic achievement in elementary and high school even when mothers' warmth and cognitive stimulation, as well as other factors (e.g., children's early general cognitive skills and mothers' educational attainment) were covaried. Mediation analyses demonstrated that over and above other attributes (e.g., temperament), children's executive functions partially accounted for the association between early autonomy-supportive parenting and children's subsequent achievement.

Differential acceleration in the final beam lines of a Heavy Ion Fusion driver

Energy Technology Data Exchange (ETDEWEB)

Friedman, Alex, E-mail: af@llnl.gov [Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States); The Virtual National Laboratory for Heavy Ion Fusion Science (United States)

2014-01-01

A long-standing challenge in the design of a Heavy Ion Fusion power plant is that the ion beams entering the target chamber, which number of order a hundred, all need to be routed from one or two multi-beam accelerators through a set of transport lines. The beams are divided into groups, each of which has a unique arrival time and may have a unique kinetic energy. It is also necessary to arrange for each beam to enter the target chamber from a prescribed location on the periphery of that chamber. Furthermore, it has generally been assumed that additional constraints must be obeyed: that the path lengths of the beams in a group must be equal, and that any delay of “main-pulse” beams relative to “foot-pulse” beams must be provided by the insertion of large delay-arcs in the main beam transport lines. Here we introduce the notion of applying “differential acceleration” to individual beams or sets of beams at strategic stages of the transport lines. That is, by accelerating some beams “sooner” and others “later,” it is possible to simplify the beam line configuration in a number of cases. For example, the time delay between the foot and main pulses can be generated without resorting to large arcs in the main-pulse beam lines. It is also possible to use differential acceleration to effect the simultaneous arrival on target of a set of beams (e.g., for the foot-pulse) without requiring that their path lengths be precisely equal. We illustrate the technique for two model configurations, one corresponding to a typical indirect-drive scenario requiring distinct foot and main energies, and the other to an ion-driven fast-ignition scenario wherein the foot and main beams share a common energy.

Differential acceleration in the final beam lines of a Heavy Ion Fusion driver

International Nuclear Information System (INIS)

Friedman, Alex

2014-01-01

A long-standing challenge in the design of a Heavy Ion Fusion power plant is that the ion beams entering the target chamber, which number of order a hundred, all need to be routed from one or two multi-beam accelerators through a set of transport lines. The beams are divided into groups, each of which has a unique arrival time and may have a unique kinetic energy. It is also necessary to arrange for each beam to enter the target chamber from a prescribed location on the periphery of that chamber. Furthermore, it has generally been assumed that additional constraints must be obeyed: that the path lengths of the beams in a group must be equal, and that any delay of “main-pulse” beams relative to “foot-pulse” beams must be provided by the insertion of large delay-arcs in the main beam transport lines. Here we introduce the notion of applying “differential acceleration” to individual beams or sets of beams at strategic stages of the transport lines. That is, by accelerating some beams “sooner” and others “later,” it is possible to simplify the beam line configuration in a number of cases. For example, the time delay between the foot and main pulses can be generated without resorting to large arcs in the main-pulse beam lines. It is also possible to use differential acceleration to effect the simultaneous arrival on target of a set of beams (e.g., for the foot-pulse) without requiring that their path lengths be precisely equal. We illustrate the technique for two model configurations, one corresponding to a typical indirect-drive scenario requiring distinct foot and main energies, and the other to an ion-driven fast-ignition scenario wherein the foot and main beams share a common energy

UAVs and Control Delays

National Research Council Canada - National Science Library

de Vries, S. C

2005-01-01

.... Delays of about 250-300 ms often lead to unacceptable airplane handling qualities. Techniques such as filtering and predictive displays may extend the range of acceptable delays up to about 400 ms...

Analytical applications for delayed neutrons

International Nuclear Information System (INIS)

Eccleston, G.W.

1983-01-01

Analytical formulations that describe the time dependence of neutron populations in nuclear materials contain delayed-neutron dependent terms. These terms are important because the delayed neutrons, even though their yields in fission are small, permit control of the fission chain reaction process. Analytical applications that use delayed neutrons range from simple problems that can be solved with the point reactor kinetics equations to complex problems that can only be solved with large codes that couple fluid calculations with the neutron dynamics. Reactor safety codes, such as SIMMER, model transients of the entire reactor core using coupled space-time neutronics and comprehensive thermal-fluid dynamics. Nondestructive delayed-neutron assay instruments are designed and modeled using a three-dimensional continuous-energy Monte Carlo code. Calculations on high-burnup spent fuels and other materials that contain a mix of uranium and plutonium isotopes require accurate and complete information on the delayed-neutron periods, yields, and energy spectra. A continuing need exists for delayed-neutron parameters for all the fissioning isotopes

49 CFR 236.563 - Delay time.

Science.gov (United States)

2010-10-01

... 49 Transportation 4 2010-10-01 2010-10-01 false Delay time. 236.563 Section 236.563 Transportation... Cab Signal Systems Rules and Instructions; Locomotives § 236.563 Delay time. Delay time of automatic... requirements of § 236.24 shall take into consideration the delay time. ...

Personality and parenting style in parents of adolescents.

Science.gov (United States)

Huver, Rose M E; Otten, Roy; de Vries, Hein; Engels, Rutger C M E

2010-06-01

Since parental personality traits are assumed to play a role in parenting behaviors, the current study examined the relation between parental personality and parenting style among 688 Dutch parents of adolescents in the SMILE study. The study assessed Big Five personality traits and derived parenting styles (authoritative, authoritarian, indulgent, and uninvolved) from scores on the underlying dimensions of support and strict control. Regression analyses were used to determine which personality traits were associated with parenting dimensions and styles. As regards dimensions, the two aspects of personality reflecting interpersonal interactions (extraversion and agreeableness) were related to supportiveness. Emotional stability was associated with lower strict control. As regards parenting styles, extraverted, agreeable, and less emotionally stable individuals were most likely to be authoritative parents. Conscientiousness and openness did not relate to general parenting, but might be associated with more content-specific acts of parenting.

Do parents of adolescents request the same universal parental support as parents of younger children? A random sample of Swedish parents.

Science.gov (United States)

Thorslund, Karin; Johansson Hanse, Jan; Axberg, Ulf

2017-07-01

Universal parental support intended to enhance parents' capacity for parenting is an important aspect of public health strategies. However, support has mostly been aimed at parents, especially mothers, of younger children. There is a gap in the research concerning parents of adolescents and fathers' interest in parenting support. To investigate and compare the interest in parenting support of parents of adolescents and younger children, potential differences between mothers and fathers, and their knowledge of what is being offered to them already, and to explore their requirements for future universal parental support. Telephone interviews were conducted with a random sample of 1336 parents. Quantitative methods were used to analyze differences between groups and qualitative methods were used to analyze open-ended questions in regard to parents' requirements for future universal parental support. About 82% of the parents of adolescents interviewed think that offering universal parental support is most important during child's adolescence. There is a substantial interest, particularly among mothers, in most forms of support. Despite their interest, parents have limited awareness of the support available. Only 7% knew about the local municipality website, although 70% reported a possible interest in such a website. Similarly, 3% knew that a parent phone line was available to them, while 59% reported a possible interest. It poses a challenge but is nevertheless important for municipalities to develop support targeted at parents of adolescents which is tailored to their needs, and to reach out with information.

Personality and Parenting Style in Parents of Adolescents

Science.gov (United States)

Huver, Rose M. E.; Otten, Roy; de Vries, Hein; Engels, Rutger C. M. E.

2010-01-01

Since parental personality traits are assumed to play a role in parenting behaviors, the current study examined the relation between parental personality and parenting style among 688 Dutch parents of adolescents in the SMILE study. The study assessed Big Five personality traits and derived parenting styles (authoritative, authoritarian,…

Delayed puberty in boys

Science.gov (United States)

... page: //medlineplus.gov/ency/article/007695.htm Delayed puberty in boys To use the sharing features on this page, please enable JavaScript. Delayed puberty in boys is when puberty does not begin ...

Delay-range-dependent exponential H∞ synchronization of a class of delayed neural networks

International Nuclear Information System (INIS)

Karimi, Hamid Reza; Maass, Peter

2009-01-01

This article aims to present a multiple delayed state-feedback control design for exponential H ∞ synchronization problem of a class of delayed neural networks with multiple time-varying discrete delays. On the basis of the drive-response concept and by introducing a descriptor technique and using Lyapunov-Krasovskii functional, new delay-range-dependent sufficient conditions for exponential H ∞ synchronization of the drive-response structure of neural networks are driven in terms of linear matrix inequalities (LMIs). The explicit expression of the controller gain matrices are parameterized based on the solvability conditions such that the drive system and the response system can be exponentially synchronized. A numerical example is included to illustrate the applicability of the proposed design method.

New Results on Passivity Analysis of Stochastic Neural Networks with Time-Varying Delay and Leakage Delay

Directory of Open Access Journals (Sweden)

YaJun Li

2015-01-01

Full Text Available The passivity problem for a class of stochastic neural networks systems (SNNs with varying delay and leakage delay has been further studied in this paper. By constructing a more effective Lyapunov functional, employing the free-weighting matrix approach, and combining with integral inequality technic and stochastic analysis theory, the delay-dependent conditions have been proposed such that SNNs are asymptotically stable with guaranteed performance. The time-varying delay is divided into several subintervals and two adjustable parameters are introduced; more information about time delay is utilised and less conservative results have been obtained. Examples are provided to illustrate the less conservatism of the proposed method and simulations are given to show the impact of leakage delay on stability of SNNs.

Exit points, on plasma, of lost fast ions during NBI in TJ-II

International Nuclear Information System (INIS)

Guasp, J.

1995-09-01

The distribution of the exit points, on plasma border, for the lost fast ions during tangential balanced NBI in TJ-II helical axis Stellarator is theoretically analysed, as well for direct as for delayed losses. The link between the position of those exit points and the corresponding at birth, orbits and drifts is analysed also, it is shown that such relation is rather independent of beam energy and plasma density and is mainly related to the magnetic configuration characteristics. This study is a needed intermediate step to the analysis of impacts of those ions on the vacuum vessel of TJ-II

Parenting paradox: parenting after infant loss.

Science.gov (United States)

Warland, Jane; O'Leary, Joann; McCutcheon, Helen; Williamson, Victoria

2011-10-01

to gain an in-depth understanding of the parenting experiences of bereaved parents in the years following an infant death. an exploratory qualitative study. semi-structured interview in the participants' homes. Data were collected over a five-month period in 2008 and analysed using thematic analysis. a purposive sample of 13 bereaved parents (10 mothers and three fathers) was used. Parents who had accessed the support services offered by two bereavement support agencies were recruited. Participants were asked to describe their experiences of raising their subsequent child. Interviews were conducted when the next born child was at least three years of age. the parents described a 'paradoxical' parenting style where they were trying to parent using two diametrically opposed unsustainable options. For example, they described trying to hold their subsequent child emotionally close but aloof at the same time. the results from this study indicate that the impact of a loss of an infant has far-reaching consequences on subsequent parenting. Support and early intervention at the time of the stillbirth and subsequent pregnancy are likely to be useful. However, further research is required to determine the extent to which early intervention can alter the tendency towards bereaved parents adopting a paradoxical parenting style. The impact of this style on mental health and the emotional health and well-being of the next born child/ren after perinatal loss should also be further examined. Copyright © 2010 Elsevier Ltd. All rights reserved.

Parent-adolescent dyads: association of parental autonomy support and parent-adolescent shared diabetes care responsibility.

Science.gov (United States)

Hanna, K M; Dashiff, C J; Stump, T E; Weaver, M T

2013-09-01

Parent-adolescent shared responsibility for diabetes care is advocated by experts to achieve beneficial diabetes and psychosocial outcomes for adolescents with type 1 diabetes. Parental autonomy support may be a way to facilitate this sharing. In this dyadic study, we examined parental diabetes-specific autonomy support experienced by adolescents with type 1 diabetes and their parents (n = 89 dyads), and its association with their experience of shared diabetes care responsibility. Path analysis was used to test an Actor-Partner Interdependence Model for parental autonomy support effects on shared responsibility. This was a secondary analysis of data from 89 parent-early/mid-adolescent dyads. Actor effects were identified. Parents' and adolescents' perceptions of parental autonomy support were associated with their respective reports of shared diabetes care responsibility. One partner effect was identified. Adolescents' reports of parental autonomy support were associated with parents' reports of shared responsibility. Parents and adolescents held similar views of autonomy support but discrepant views of shared responsibility. Older adolescents perceived less parental autonomy support. Increasing parental autonomy support may facilitate parent-adolescent sharing of diabetes care responsibility. Adolescent and parent perceptions influence each other and need to be considered when working with them to strengthen parental autonomy support. © 2012 John Wiley & Sons Ltd.

Parental Influences on Adolescent Adjustment: Parenting Styles Versus Parenting Practices

Science.gov (United States)

Lee, Sang Min; Daniels, M. Harry; Kissinger, Daniel B.

2006-01-01

The study identified distinct patterns of parental practices that differentially influence adolescent behavior using the National Educational Longitudinal Survey (NELS:88) database. Following Brenner and Fox's research model (1999), the cluster analysis was used to classify the four types of parental practices. The clusters of parenting practices…

Parenting Seminars for Divorcing Parents.

Science.gov (United States)

Frieman, Barry B.

1995-01-01

Profiles the parenting seminars and counseling services for divorcing parents offered by the Children of Separation and Divorce Center, a community service agency in Maryland. The seminars are designed to help parents adjust to divorce and understand the needs of their children during and after the divorce process. (MDM)

Parenting Beliefs, Parental Stress, and Social Support Relationships

Science.gov (United States)

Respler-Herman, Melissa; Mowder, Barbara A.; Yasik, Anastasia E.; Shamah, Renee

2012-01-01

The present study built on prior research by examining the relationship of parental stress and social support to parenting beliefs and behaviors. A sample of 87 parents provided their views concerning the importance of parenting characteristics as well as their level of parental stress and perceived social support. These parents completed the…

Discounting of Monetary Rewards that are Both Delayed and Probabilistic: Delay and Probability Combine Multiplicatively, not Additively

Science.gov (United States)

Vanderveldt, Ariana; Green, Leonard; Myerson, Joel

2014-01-01

The value of an outcome is affected both by the delay until its receipt (delay discounting) and by the likelihood of its receipt (probability discounting). Despite being well-described by the same hyperboloid function, delay and probability discounting involve fundamentally different processes, as revealed, for example, by the differential effects of reward amount. Previous research has focused on the discounting of delayed and probabilistic rewards separately, with little research examining more complex situations in which rewards are both delayed and probabilistic. In two experiments, participants made choices between smaller rewards that were both immediate and certain and larger rewards that were both delayed and probabilistic. Analyses revealed significant interactions between delay and probability factors inconsistent with an additive model. In contrast, a hyperboloid discounting model in which delay and probability were combined multiplicatively provided an excellent fit to the data. These results suggest that the hyperboloid is a good descriptor of decision making in complicated monetary choice situations like those people encounter in everyday life. PMID:24933696

Menstrual management in developmentally delayed adolescent females.

Science.gov (United States)

Chuah, Irene; McRae, Alexandra; Matthews, Kim; Maguire, Ann M; Steinbeck, Katharine

2017-06-01

Requests for assistance in menstrual management and menstrual suppression are a common, emotive and sometimes controversial aspect of adolescent disability care. To review the uptake and outcomes of menstrual suppression among adolescent patients with developmental delay. A retrospective review of the medical records of adolescent females with intellectual disability referred for menstrual management to the Paediatric and Adolescent Gynaecology Clinic, Children's Hospital at Westmead, Sydney, for the three-year period between January 1, 2010 and January 1, 2013. Eighty adolescent patients with developmental delay were identified. A third (n = 28) of the patients were pre-menarcheal at first review with parent/caregivers seeking anticipatory advice. Of the post-menarcheal patients, the median age of menarche was 12 years (range 10-15 years). First and second line interventions were documented as were reasons for change where applicable. The combined oral contraceptive pill (COCP) was the most frequently used therapy (67%), and 19 patients in total had a levonorgestrel releasing intrauterine system (LNG-IUS) inserted (31%). Our study population differs from similar previously published groups in the marked absence of the use of depot medroxyprogesterone acetate or the subdermal etonogestrel releasing device. As a paediatrician, it is important to address menstrual management issues and allay caregiver concerns with appropriate advice. Our study supports the use of the COCP as sound first line management in achieving menstrual suppression. The LNG-IUS appears to be a favourable second line option. Further investigation into longer-term outcomes and potential complications of device insertion is recommended. © 2017 The Royal Australian and New Zealand College of Obstetricians and Gynaecologists.

Parenting styles and conceptions of parental authority during adolescence.

Science.gov (United States)

Smetana, J G

1995-04-01

Reports of parenting styles were assessed in 110 primarily white, middle-class sixth, eighth, and tenth graders (M = 11.98, 13.84, and 16.18 years of age) and their parents (108 mothers and 92 fathers). Parents judged the legitimacy of parental authority and rated family conflict and rules regarding 24 hypothetical moral, conventional, personal, multifaceted (containing conventional and personal components), prudential, and friendship issues. Adolescents viewed their parents as more permissive and more authoritarian than parents viewed themselves, whereas parents viewed themselves as more authoritative than did adolescents. Parents' parenting styles differentiated their conceptions of parental authority, but adolescents' perceptions did not. Differences were primarily over the boundaries of adolescents' personal jurisdiction. Furthermore, conceptions of parental authority and parenting styles both contributed significantly to emotional autonomy and adolescent-parent conflict. The implications of the findings for typological models of parenting and distinct domain views of social-cognitive development are discussed.

Parenting intervention effects on parental depressive symptoms: examining the role of parenting and child behavior.

Science.gov (United States)

Wong, Jessie J; Gonzales, Nancy A; Montaño, Zorash; Dumka, Larry; Millsap, Roger E

2014-06-01

Parental depression is a major risk factor in child development. Growing research suggests parenting programs can positively impact parental depressive symptoms, although the specific mechanisms that explain these effects are unknown. The current study examined parenting mediated effects of a parenting program on mothers' and fathers' depressive symptoms, as well as the role of child behavior in linking parenting to reductions in depressive symptoms. The study samples included 494 mothers and 288 fathers of Mexican origin adolescents who participated in a randomized trial of the Bridges to High School Program/Proyecto Puentes a la Secundaria, a universal prevention and promotion intervention that included parent training but did not directly target parental depressive symptoms. Parenting mediator models tested program effects on parental depressive symptoms through changes in harsh and supportive parenting. Results showed a significant indirect intervention effect on maternal depressive symptoms through changes in mothers' harsh parenting. Next, child behavior models revealed a partial mediation effect of harsh parenting and a full mediation effect of supportive parenting on maternal depressive symptoms through mothers' reports of child externalizing symptoms. Indirect effects of fathers' harsh and supportive parenting on paternal depressive symptoms were also found through fathers' reports of child behavior. PsycINFO Database Record (c) 2014 APA, all rights reserved.

Preliminary Study of Neurodevelopmental Outcomes and Parenting Stress in Pediatric Mitochondrial Disease.

Science.gov (United States)

Eom, Soyong; Lee, Young-Mock

2017-06-01

Little is known regarding the neuropsychological profiles of pediatric patients with mitochondrial diseases or their parents, information that is crucial for improving the quality of life (QOL) for both patients and parents. We aimed to delineate neurodevelopment and psychological comorbidity in children with mitochondrial diseases in the preliminary investigation of adequate intervention methods, better prognoses, and improved QOL for both patients and parents. Seventy children diagnosed with mitochondrial diseases were neuropsychologically evaluated. Neurocognitive (development, intelligence) and psychological (behavior, daily living function, maternal depression, parenting stress) functions were analyzed. Clinical variables, including the first symptom, epileptic classification, organ involvement, lactic acidosis, brain magnetic resonance imaging findings, muscle pathology, biochemical enzyme assay results, and syndromic diagnosis of mitochondrial diseases, were also reviewed. Prediagnostic assessments indicated that cognitive and psychomotor developments were significantly delayed. Group mean full scale intelligence quotient (IQ) scores indicated mild levels of intellectual disability, borderline levels of verbal IQ impairment, and mild levels of intellectual disability on performance IQ. Many children exhibited clinically significant levels of behavioral problems, whereas mothers of children with mitochondrial diseases exhibited significant increases in parenting stress relative to mothers of healthy children. Furthermore, 65% of mothers exhibited significant levels of depression. Early onset of the first symptoms, diffuse brain atrophy, and drug-resistant epilepsy negatively influenced neurodevelopmental and adaptive functions. Better understanding of the functional levels and profiles of neurodevelopment and psychological comorbidity in children with mitochondrial diseases in the prediagnostic period is essential for adequate support and QOL of children with

Delayed enhanced MRI in intraparenchymal tumors

International Nuclear Information System (INIS)

Eguchi, Takahiko; Morimoto, Tetsuya; Takeshima, Toshikazu

1991-01-01

Delayed enhanced MRI was performed on 20 intraparenchymal tumors, and these findings were compared with those of early enhanced MRI. Using the spin-echo technique (SE: 400-500/20 msec), early scans were obtained 5 minutes, and delayed scans were obtained 60 minutes, after the intravenous injection of 0.1 nmol of gadolinium-DTPA/Kg. We discussed the changes in the delayed scan with regard to the change in the pattern of enhancement and the boundary of enhancement. In these twenty intraparenchymal tumors, there were three low-grade astrocytomas, two anaplastic astrocytomas, seven glioblastomas, and eight metastatic tumors. The changes in the enhanced pattern showed three types as follows: Type I: heterogeneous enhancement in both early and delayed scans; Type II: heterogeneous enhancement in early scan and homogeneous enhancement in delayed scan; Type III: homogeneous enhancement in both early and delayed scans. Most malignant tumors, such as glioblastomas (6/8), anaplastic astrocytomas (2/2), and metastatic tumors (7/8), revealed Type I, although low-grade astrocytomas showed Type II (3/2) and Type III (1/3). The heterogeneous enhancement in delayed scan was found in malignant tumors and in low-grade astrocytoma; even if the early scan revealed heterogeneous enhancement, the delayed scan showed homogeneous enhancement. In the delayed scan, most enhanced boundaries spread out of the boundaries in the early scan. Glioblastomas spread markedly in the delayed scan, although none of the low-grade astrocytomas, anaplastic astrocytomas, or metastases revealed marked spreading. We called these marked increases in the delayed scan a 'spreading sign' and thought that this sign was specific to glioblastomas. Recently some authors have emphasized the usefulness of serial scans. Delayed enhanced MRI 60 minutes after the administration of a contrast medium was here found also to be useful for the accurate diagnosis for brain tumors. (author)

Project delay analysis of HRSG

Science.gov (United States)

Silvianita; Novega, A. S.; Rosyid, D. M.; Suntoyo

2017-08-01

Completion of HRSG (Heat Recovery Steam Generator) fabrication project sometimes is not sufficient with the targeted time written on the contract. The delay on fabrication process can cause some disadvantages for fabricator, including forfeit payment, delay on HRSG construction process up until HRSG trials delay. In this paper, the author is using semi quantitative on HRSG pressure part fabrication delay with configuration plant 1 GT (Gas Turbine) + 1 HRSG + 1 STG (Steam Turbine Generator) using bow-tie analysis method. Bow-tie analysis method is a combination from FTA (Fault tree analysis) and ETA (Event tree analysis) to develop the risk matrix of HRSG. The result from FTA analysis is use as a threat for preventive measure. The result from ETA analysis is use as impact from fabrication delay.

Nonlinear delay monopoly with bounded rationality

International Nuclear Information System (INIS)

Matsumoto, Akio; Szidarovszky, Ferenc

2012-01-01

The purpose of this paper is to study the dynamics of a monopolistic firm in a continuous-time framework. The firm is assumed to be boundedly rational and to experience time delays in obtaining and implementing information on output. The dynamic adjustment process is based on the gradient of the expected profit. The paper is divided into three parts: we examine delay effects on dynamics caused by one-time delay and two-time delays in the first two parts. Global dynamics and analytical results on local dynamics are numerically confirmed in the third part. Four main results are demonstrated. First, the stability switch from stability to instability occurs only once in the case of a single delay. Second, the alternation of stability and instability can continue if two time delays are involved. Third, the occurence of Hopf bifurcation is analytically shown if stability is lost. Finally, in a bifurcation process, there are a period-doubling cascade to chaos and a period-halving cascade to the equilibrium point in the case of two time delays if the difference between the two delays is large.

Exit points, on plasma, of lost fast ions during NBI in TJ-II; Puntos de salida en el plasma de los iones rapidos durante NBI en el TJ-II

Energy Technology Data Exchange (ETDEWEB)

Guasp, J.

1995-07-01

The distribution of the exit points, on plasma border, for the lost fast ions during tangential balanced NBI in TJ-II helical axis Stellarator is theoretically analysed, as well for direct as for delayed losses. The link between, the position of those exit points and the corresponding at birth, orbits and drifts is analysed also. It is shown that such relation is rather independent of beam energy and plasma density and is mainly related to the magnetic configuration characteristics. This study is a needed intermediate step to the analysis of impacts of those ions on the vacuum vessel of TJ-II. (Author) 2 refs.

Memorized discrete systems and time-delay

CERN Document Server

Luo, Albert C J

2017-01-01

This book examines discrete dynamical systems with memory—nonlinear systems that exist extensively in biological organisms and financial and economic organizations, and time-delay systems that can be discretized into the memorized, discrete dynamical systems. It book further discusses stability and bifurcations of time-delay dynamical systems that can be investigated through memorized dynamical systems as well as bifurcations of memorized nonlinear dynamical systems, discretization methods of time-delay systems, and periodic motions to chaos in nonlinear time-delay systems. The book helps readers find analytical solutions of MDS, change traditional perturbation analysis in time-delay systems, detect motion complexity and singularity in MDS; and determine stability, bifurcation, and chaos in any time-delay system.

Head-on collisions of electrostatic solitons in multi-ion plasmas

International Nuclear Information System (INIS)

Verheest, Frank; Hellberg, Manfred A.; Hereman, Willy A.

2012-01-01

Head-on collisions between two electrostatic solitons are dealt with by the Poincaré-Lighthill-Kuo method of strained coordinates, for a plasma composed of a number of cold (positive and negative) ion species and Boltzmann electrons. The nonlinear evolution equations for both solitons and their phase shift due to the collision, resulting in time delays, are established. A Korteweg-de Vries description is the generic conclusion, except when the plasma composition is special enough to replace the quadratic by a cubic nonlinearity in the evolution equations, with concomitant repercussions on the phase shifts. Applications include different two-ion plasmas, showing positive or negative polarity solitons in the generic case. At critical composition, a combination of a positive and a negative polarity soliton is possible.

Vernier Delay Unit

International Nuclear Information System (INIS)

Pierce, W.B.

1984-10-01

This module will accept differential ECL pulses from the auxiliary rear panel or NIM level pulses from the front panel. The pulses are produced at the output with a fixed delay that is software programmable in steps of 0.1 ns over the range of 0.1 to 10.5 ns. Multiple outputs are available at the front panel. Minimum delay through the module is 9 ns

Energy and dose characteristics of ion bombardment during pulsed laser deposition of thin films under pulsed electric field

International Nuclear Information System (INIS)

Fominski, V.Yu.; Nevolin, V.N.; Smurov, I.

2004-01-01

Experiments on pulsed laser deposition of Fe films on Si substrates were performed with the aim to analyze the role of factors determining the formation of an energy spectrum and a dose of ions bombarding the film in strong pulsed electric fields. The amplitude of the high-voltage pulse (-40 kV) applied to the substrate and the laser fluence at the Fe target were fixed during the deposition. Owing to the high laser fluence (8 J/cm 2 ) at a relatively low power (20 mJ), the ionization of the laser plume was high, but the Fe vapor pressure near the substrate was low enough to avoid arcing. Electric signals from a target exposed to laser radiation were measured under different conditions (at different delay times) of application of electric pulses. The Si(100) substrates were analyzed using Rutherford ion backscattering/channeling spectrometry. The ion implantation dose occurred to be the highest if the high-voltage pulse was applied at a moment of time when the ion component of the plume approached the substrate. In this case, the implanted ions had the highest energy determined by the amplitude of the electric pulse. An advance or delay in applying a high-voltage pulse caused the ion dose and energy to decrease. A physical model incorporating three possible modes of ion implantation was proposed for the interpretation of the experimental results. If a laser plume was formed in the external field, ions were accelerated from the front of the dense plasma, and the ion current depended on the gas-dynamic expansion of the plume. The application of a high-voltage pulse, at the instant when the front approached the substrate, maintained the mode that was characteristic of the traditional plasma immersion ion implantation, and the ion current was governed by the dynamics of the plasma sheath in the substrate-to-target gap. In the case of an extremely late application of a high-voltage pulse, ions retained in the entire volume of the experimental chamber (as a result of the

Parental influences on memories of parents and friends.

Science.gov (United States)

Tani, Franca; Bonechi, Alice; Peterson, Carole; Smorti, Andrea

2010-01-01

The authors evaluated the role parent-child relationship quality has on two types of memories, those of parents and those of friends. Participants were 198 Italian university students who recalled memories during 4 separate timed memory-fluency tasks about their preschool, elementary school, middle school, high school and university years. Half were instructed to recall memories involving parents and the remainder memories involving friends. Moreover, parent-child relationships were assessed by the Network of Relationships Inventory (NRI; W. Furman & D. Buhrmester, 1985) and Adolescents' Report of Parental Monitoring (D. M. Capaldi & G. R. Patterson, 1989). Results showed that men with positive parent-son relationships had more memories of parents and more affectively positive memories of friends, supporting a consistency model positing similarity between parent-child relationships and memories of friends. Women with positive parental relationship quality had more affectively positive memories of parents but for friends, positive relationship quality only predicted positive memories when young. At older ages, especially middle school-aged children, negative parent-daughter relationships predicted more positive memories of friends, supporting a compensatory model. The gender of parent also mattered, with fathers having a more influential role on affect for memories of friends.

What is good parental education? Interviews with parents who have attended parental education sessions.

Science.gov (United States)

Petersson, Kerstin; Petersson, Christer; Håkansson, Anders

2004-03-01

The aim of the study was to highlight the experiences and expectations of Swedish parents with respect to general parental education within child healthcare. Interviews were carried out with 25 parents who had attended education sessions. With a few exceptions the fathers did not take part, and those mothers who did comprised a relatively highly educated group; their views therefore predominate in this study. Socially vulnerable parents such as the unemployed and immigrants took part more sporadically in the meetings, which is why less material is available from these groups. The arrangement and analysis of the material was done using qualitative content analysis. We identified two main categories of importance: 'parental education content' and 'parental education structure'. The parents were on the whole satisfied with the content with respect to the child's physical and psychosocial development. On the other hand, first-time parents expressed a degree of uncertainty with respect to the new parent roles and parent relation and they thought that the education should place more emphasis on the interplay between the parents and between child and parents. The degree of confidence in the nurse as group leader was mainly high. The parents thought that the groups functioned well socially and were satisfied with the organization of the meetings. They did, however, demand clearer structure and framework with respect to the content. Since the aim of legally established parental education is to improve the conditions of childhood growth and to provide support to parents, it must be considered especially important to provide resources so that the socially vulnerable groups in the community may also be reached.

Parental care mitigates carry-over effects of poor early conditions on offspring growth

Science.gov (United States)

Auer, Sonya K.; Martin, Thomas E.

2017-01-01

Poor developmental conditions can have long-lasting negative effects on offspring phenotypes, but impacts often differ among species. Contrasting responses may reflect disparities in experimental protocols among single-species studies or inherent differences among species in their sensitivity to early conditions and/or ability to mitigate negative impacts. We used a common experimental protocol to assess and compare the role of parental care in mitigating effects of poor early conditions on offspring among 4 sympatric bird species in the wild. We experimentally induced low incubation temperatures and examined effects on embryonic developmental rates, hatching success, nestling growth rates, and parental responses. We examined the generality of these effects across 4 species that differ in their phylogenetic history, breeding ecology, and life histories. We found that cooling led to delayed hatching in all species, but carry-over effects on offspring differed among species. Parents of some but not all species increased their offspring provisioning rates in response to experimental cooling with critical benefits for offspring growth rates. Our study shows for the first time that species exhibit clear differences in the degree to which they are affected by poor early conditions. Observed differences among species demonstrate that parental care is a critical mechanism for mitigating potential negative effects on offspring and suggest that parental responses may be constrained to varying degrees by ecology and life histories.

Ion-ion collisions and ion storage rings

International Nuclear Information System (INIS)

Mowat, J.R.

1988-01-01

Improved understanding of fundamental ion-ion interactions is expected to emerge from research carried out with ion storage rings. In this short survey the significant advantages and unique features that make stored ions useful targets for collision experiments are reviewed and discussed. It is pointed out that improvements to existing ion-ion experiments, as well as qualitatively new experiments, should occur over the next few years as ion storage rings become available for atomic physics. Some new experiments are suggested which are difficult if not impossible with present-day technology, but which seem feasible at storage rings facilities. (orig.)

EARLY POSTPARTUM PARENTAL PREOCCUPATION AND POSITIVE PARENTING THOUGHTS: RELATIONSHIP WITH PARENT-INFANT INTERACTION.

Science.gov (United States)

Kim, Pilyoung; Mayes, Linda; Feldman, Ruth; Leckman, James F; Swain, James E

2013-01-01

Parenting behaviors and parent-infant emotional bonding during the early postpartum months play a critical role in infant development. However, the nature and progression of parental thoughts and their relationship with interactive behaviors have received less research. The current study investigated the trajectory of parental thoughts and behaviors among primiparous mothers ( n = 18) and fathers ( n = 15) and multiparous mothers ( n = 13) and fathers ( n = 13), which were measured at the first and third postpartum month. At the third postpartum month, the relationship between parental thoughts and parental interactive behaviors also was tested. Mothers and fathers showed high levels of preoccupations and caregiving thoughts during the first postpartum month that significantly declined by the third postpartum month. In contrast, positive thoughts about parenting and the infant increased over the same time interval. Mothers presented higher levels of preoccupations and positive thoughts than did fathers, and first-time parents reported more intense preoccupations than did experienced parents. Although maternal sensitivity was inversely related to maternal anxious thoughts, paternal sensitivity was predicted by higher levels of anxious as well as caregiving and positive thoughts.

Exponential synchronization of two nonlinearly non-delayed and delayed coupled complex dynamical networks

International Nuclear Information System (INIS)

Zheng Song

2012-01-01

In this paper, the exponential synchronization between two nonlinearly coupled complex networks with non-delayed and delayed coupling is investigated with Lyapunov-Krasovskii-type functionals. Based on the stability analysis of the impulsive differential equation and the linear matrix inequality, sufficient delay-dependent conditions for exponential synchronization are derived, and a linear impulsive controller and simple updated laws are also designed. Furthermore, the coupling matrices need not be symmetric or irreducible. Numerical examples are presented to verify the effectiveness and correctness of the synchronization criteria obtained.

Affinity of hydroxyapatite by radionuclides parent/child in 188Re/188W generator for radiotherapy

International Nuclear Information System (INIS)

Carrera D, A. A.; Badillo A, V.; Badillo A, V. E.; Monroy G, F.

2009-10-01

To assess the feasibility of using apatites as matrices of 188 W/ 188 Re generator is essential to obtain the distribution coefficients as much of parent radionuclide as child radionuclide in apatite, that is to say to know their affinity for the solid. It was selected the mineral species more representative as adsorbent, the hydroxyapatite Ca 10 (PO 4 ) 6 (OH) 2 it is known for its great capacity of ions retention and by presenting a large affinity for anionic species in their surface. In this paper we use a synthetic hydroxyapatite marketed by Bio-Rad. This paper presents the preliminary results regarding the affinity of hydroxyapatite for the anionic species tungstates (WO 4 2- ) and perrhenates (ReO 4 - in EDTA, as background electrolyte expressed as distribution coefficients between two immiscible phases obtained with the help of radioactive tracers 187 W and 188 Re respectively. The retention measures of these ions, traces show that Bio-Gel hydroxyapatite presents moderate values of distribution coefficients for anionic species of W(Vi) in EDTA 0.01 mol/L that are in the range p H 5 to 6.5; the parent radionuclide of generator 188 Re/ 188 W is fixed but not enough to consider it a good absorbent. By contrast, the fixation of perrhenate ions is virtually wiped as may be easily removed from a hydroxyapatite column packed with a saline solution. The influence of this saline solution in the removal of perrhenate ions is null practically. (Author)

Personality and parenting style in parents of adolescents

NARCIS (Netherlands)

Huver, R.M.E.; Otten, R.; Vries, H. de; Engels, R.C.M.E.

2010-01-01

Since parental personality traits are assumed to play a role in parenting behaviors, the current study examined the relation between parental personality and parenting style among 688 Dutch parents of adolescents in the SMILE study. The study assessed Big Five personality traits and derived

On- and off-line monitoring of ion beam treatment

Energy Technology Data Exchange (ETDEWEB)

Parodi, Katia, E-mail: katia.parodi@lmu.de

2016-02-11

Ion beam therapy is an emerging modality for high precision radiation treatment of cancer. In comparison to conventional radiation sources (photons, electrons), ion beams feature major dosimetric advantages due to their finite range with a localized dose deposition maximum, the Bragg peak, which can be selectively adjusted in depth. However, due to several sources of treatment uncertainties, full exploitation of these dosimetric advantages in clinical practice would require the possibility to visualize the stopping position of the ions in vivo, ideally in real-time. To this aim, different imaging methods have been proposed and investigated, either pre-clinically or even clinically, based on the detection of prompt or delayed radiation following nuclear interaction of the beam with the irradiated tissue. However, the chosen or ad-hoc developed instrumentation has often relied on technologies originally conceived for different applications, thus compromising on the achievable performances for the sake of cost-effectiveness. This contribution will review major examples of used instrumentation and related performances, identifying the most promising detector developments for next generation devices especially dedicated to on-line monitoring of ion beam treatment. Moreover, it will propose an original combination of different techniques in a hybrid detection scheme, aiming to make the most of complementary imaging methods and open new perspectives of image guidance for improved precision of ion beam therapy.

Delay-Range-Dependent H∞ Control for Automatic Mooring Positioning System with Time-Varying Input Delay

Directory of Open Access Journals (Sweden)

Xiaoyu Su

2014-01-01

Full Text Available Aiming at the economy and security of the positioning system in semi-submersible platform, the paper presents a new scheme based on the mooring line switching strategy. Considering the input delay in switching process, H∞ control with time-varying input delay is designed to calculate the control forces to resist disturbing forces. In order to reduce the conservativeness, the information of the lower bound of delay is taken into account, and a Lyapunov function which contains the range of delay is constructed. Besides, the input constraint is considered to avoid breakage of mooring lines. The sufficient conditions for delay-range-dependent stabilization are derived in terms of LMI, and the controller is also obtained. The effectiveness of the proposed approach is illustrated by a realistic design example.

Systematic of delayed neutron parameters

International Nuclear Information System (INIS)

Isaev, S.G.; Piksaikin, V.M.

2000-01-01

The experimental studies of the energy dependence of the delayed neutron (DN) parameters for various fission systems has shown that the behaviour of a some combination of delayed neutron parameters has a similar features. On the basis of this findings the systematics of delayed neutron experimental data for thorium, uranium, plutonium and americium isotopes have been investigated with the purpose to find a correlation of DN parameters with characteristics of fissioning system as well as a correlation between the delayed neutron parameters themselves. It was presented the preliminary results which were obtained during study the physics interpretation of the results [ru

Parental Involvement in Mathematics: Giving Parents a Voice

Science.gov (United States)

Wilder, S.

2017-01-01

Understanding why parents become involved in their children's education is crucial in strengthening the relationship between parental involvement and academic achievement. The present study focuses on the parental role construction and parental self-efficacy. The resulting trends suggest that parents, regardless of their self-efficacy, may assume…

Parent-Child Agreement on Parent-to-Child Maltreatment.

Science.gov (United States)

Compier-de Block, Laura H C G; Alink, Lenneke R A; Linting, Mariëlle; van den Berg, Lisa J M; Elzinga, Bernet M; Voorthuis, Alexandra; Tollenaar, Marieke S; Bakermans-Kranenburg, Marian J

2017-01-01

Parent-child agreement on child maltreatment was examined in a multigenerational study. Questionnaires on perpetrated and experienced child maltreatment were completed by 138 parent-child pairs. Multi-level analyses were conducted to explore whether parents and children agreed about levels of parent-to-child maltreatment (convergence), and to examine whether parents and children reported equal levels of child maltreatment (absolute differences). Direct and moderating effects of age and gender were examined as potential factors explaining differences between parent and child report. The associations between parent- and child-reported maltreatment were significant for all subtypes, but the strength of the associations was low to moderate. Moreover, children reported more parent-to-child neglect than parents did. Older participants reported more experienced maltreatment than younger participants, without evidence for differences in actual exposure. These findings support the value of multi-informant assessment of child maltreatment to improve accuracy, but also reveal the divergent perspectives of parents and children on child maltreatment.

Delay-Dependent Guaranteed Cost H∞ Control of an Interval System with Interval Time-Varying Delay

Directory of Open Access Journals (Sweden)

Zhongke Shi

2009-01-01

Full Text Available This paper concerns the problem of the delay-dependent robust stability and guaranteed cost H∞ control for an interval system with time-varying delay. The interval system with matrix factorization is provided and leads to less conservative conclusions than solving a square root. The time-varying delay is assumed to belong to an interval and the derivative of the interval time-varying delay is not a restriction, which allows a fast time-varying delay; also its applicability is broad. Based on the Lyapunov-Ktasovskii approach, a delay-dependent criterion for the existence of a state feedback controller, which guarantees the closed-loop system stability, the upper bound of cost function, and disturbance attenuation lever for all admissible uncertainties as well as out perturbation, is proposed in terms of linear matrix inequalities (LMIs. The criterion is derived by free weighting matrices that can reduce the conservatism. The effectiveness has been verified in a number example and the compute results are presented to validate the proposed design method.

Stochastic two-delay differential model of delayed visual feedback effects on postural dynamics.

Science.gov (United States)

Boulet, Jason; Balasubramaniam, Ramesh; Daffertshofer, Andreas; Longtin, André

2010-01-28

We report on experiments and modelling involving the 'visuo-postural control loop' in the upright stance. We experimentally manipulated an artificial delay to the visual feedback during standing, presented at delays ranging from 0 to 1 s in increments of 250 ms. Using stochastic delay differential equations, we explicitly modelled the centre-of-pressure (COP) and centre-of-mass (COM) dynamics with two independent delay terms for vision and proprioception. A novel 'drifting fixed point' hypothesis was used to describe the fluctuations of the COM with the COP being modelled as a faster, corrective process of the COM. The model was in good agreement with the data in terms of probability density functions, power spectral densities, short- and long-term correlations (Hurst exponents) as well the critical time between the two ranges. This journal is © 2010 The Royal Society

Parenting Styles and Beliefs about Parental Authority.

Science.gov (United States)

Smetana, Judith G.

1994-01-01

Suggests that models of parenting style, such as Baumrind's popular model, are insensitive to variations in parenting resulting from characteristics of the different situations in which the parenting is expressed. Argues that considering parenting in context adds greater specificity to the model and enhances the potential for predicting child…

Review of ISOL target-ion-source systems

CERN Document Server

Kirchner, R

2003-01-01

Any review of target-ion-source systems (TISS) is necessarily a variation of the ISOL-theme 'efficient, fast, selective'. In the first part, more than 30 years of TISS development are examined in view of these key characteristics. By looking at the lines of development that were successful, at the lines that were abandoned (partly for good, partly for less good reasons), the lines with the most promising perspectives emerge. The second part deals with on-line chemistry in the TISS and its possibly double benefits: enhanced selectivity or increased separation speed, or both in favourable cases, as the relatively new sulfide chemistry. For the group-IVa-elements germanium and tin, the separation as sulfide-ions does not only suppress strongly the contamination by the neighbouring elements. It also reduces the effusion part of the release by orders of magnitude to the level of the intrinsic delay caused by molecular flow. The homologue chemistry is likely to work for silicon, but not for lead. While selectivity ...

Analysis of a first-order delay differential-delay equation containing two delays

Science.gov (United States)

Marriott, C.; Vallée, R.; Delisle, C.

1989-09-01

An experimental and numerical analysis of the behavior of a two-delay differential equation is presented. It is shown that much of the system's behavior can be related to the stability behavior of the underlying linearized modes. A new phenomenon, mode crossing, is explored.

Delaying gratification depends on social trust

Science.gov (United States)

Michaelson, Laura; de la Vega, Alejandro; Chatham, Christopher H.; Munakata, Yuko

2013-01-01

Delaying gratification is hard, yet predictive of important life outcomes, such as academic achievement and physical health. Prominent theories focus on the role of self-control, hypersensitivity to immediate rewards, and the cost of time spent waiting. However, delaying gratification may also require trust in people delivering future rewards as promised. To test the role of social trust, participants were presented with character vignettes and faces that varied in trustworthiness, and then choose between hypothetical smaller immediate or larger delayed rewards from those characters. Across two experiments, participants were less willing to wait for delayed rewards from less trustworthy characters, and perceived trustworthiness predicted willingness to delay gratification. These findings provide the first demonstration of a causal role for social trust in willingness to delay gratification, independent of other relevant factors, such as self-control or reward history. Thus, delaying gratification requires choosing not only a later reward, but a reward that is potentially less likely to be delivered, when there is doubt about the person promising it. Implications of this work include the need to revise prominent theories of delay of gratification, and new directions for interventions with populations characterized by impulsivity. PMID:23801977

Delaying gratification depends on social trust

Directory of Open Access Journals (Sweden)

Laura eMichaelson

2013-06-01

Full Text Available Delaying gratification is hard, yet predictive of important life outcomes, such as academic achievement and physical health. Prominent theories focus on the role of self-control, hypersensitivity to immediate rewards, and the cost of time spent waiting. However, delaying gratification may also require trust in people delivering future rewards as promised. To test the role of social trust, participants were presented with character vignettes and faces that varied in trustworthiness, and then chose between hypothetical smaller immediate or larger delayed rewards from those characters. Across two experiments, participants were less willing to wait for delayed rewards from less trustworthy characters, and perceived trustworthiness predicted willingness to delay gratification. These findings provide the first demonstration of a causal role for social trust in willingness to delay gratification, independent of other relevant factors, such as self-control or reward history. Thus, delaying gratification requires choosing not only a later reward, but a reward that is potentially less likely to be delivered, when there is doubt about the person promising it. Implications of this work include the need to revise prominent theories of delay of gratification, and new directions for interventions with populations characterized by impulsivity.

An evaluation of the Parents Plus-Parenting When Separated programme.

Science.gov (United States)

Keating, Adele; Sharry, John; Murphy, Michelle; Rooney, Brendan; Carr, Alan

2016-04-01

This study evaluated the Parents Plus-Parenting when Separated Programme, an intervention specifically designed to address the needs of separated parents in an Irish context. In a randomized control trial, 82 separated parents with young children were assigned to the Parents Plus-Parenting when Separated Programme treatment group and 79 to a waiting-list control group. They were assessed on measures of client goals, parenting satisfaction, child and parental adjustment and interparental conflict at baseline (Time 1) and 6 weeks later (Time 2), after the treatment group completed the Parents Plus-Parenting when Separated Programme. From Time 1 to 2, significant goal attainment, increases in parenting satisfaction and decreases in child behaviour problems, parental adjustment problems and interparental conflict occurred in the Parents Plus-Parenting when Separated Programme group, but not in the control group. These results supported the effectiveness of Parents Plus-Parenting when Separated Programme, which should be made more widely available to separated parents. © The Author(s) 2015.

Boarding is associated with higher rates of medication delays and adverse events but fewer laboratory-related delays.

Science.gov (United States)

Sri-On, Jiraporn; Chang, Yuchiao; Curley, David P; Camargo, Carlos A; Weissman, Joel S; Singer, Sara J; Liu, Shan W

2014-09-01

Hospital crowding and emergency department (ED) boarding are large and growing problems. To date, there has been a paucity of information regarding the quality of care received by patients boarding in the ED compared with the care received by patients on an inpatient unit. We compared the rate of delays and adverse events at the event level that occur while boarding in the ED vs while on an inpatient unit. This study was a secondary analysis of data from medical record review and administrative databases at 2 urban academic teaching hospitals from August 1, 2004, through January 31, 2005. We measured delayed repeat cardiac enzymes, delayed partial thromboplastin time level checks, delayed antibiotic administration, delayed administration of home medications, and adverse events. We compared the incidence of events during ED boarding vs while on an inpatient unit. Among 1431 patient medical records, we identified 1016 events. Emergency department boarding was associated with an increased risk of home medication delays (risk ratio [RR], 1.54; 95% confidence interval [CI], 1.26-1.88), delayed antibiotic administration (RR, 2.49; 95% CI, 1.72-3.52), and adverse events (RR, 2.36; 95% CI, 1.15-4.72). On the contrary, ED boarding was associated with fewer delays in repeat cardiac enzymes (RR, 0.17; 95% CI, 0.09-0.27) and delayed partial thromboplastin time checks (RR, 0.54; 95% CI, 0.27-0.96). Compared with inpatient units, ED boarding was associated with more medication-related delays and adverse events but fewer laboratory-related delays. Until we can eliminate ED boarding, it is critical to identify areas for improvement. Copyright © 2014 Elsevier Inc. All rights reserved.

Global exponential convergence of neutral-type Hopfield neural networks with multi-proportional delays and leakage delays

International Nuclear Information System (INIS)

Xu, Changjin; Li, Peiluan

2017-01-01

This paper is concerned with a class of neutral-type Hopfield neural networks with multi-proportional delays and leakage delays. Using the differential inequality theory, a set of sufficient conditions which guarantee that all solutions of neutral-type Hopfield neural networks with multi-proportional delays and leakage delays converge exponentially to zero vector are derived. Computer simulations are carried out to verify our theoretical findings. The obtained results of this paper are new and complement some previous studies.

Delay-Dependent Exponential Stability for Discrete-Time BAM Neural Networks with Time-Varying Delays

Directory of Open Access Journals (Sweden)

Yonggang Chen

2008-01-01

Full Text Available This paper considers the delay-dependent exponential stability for discrete-time BAM neural networks with time-varying delays. By constructing the new Lyapunov functional, the improved delay-dependent exponential stability criterion is derived in terms of linear matrix inequality (LMI. Moreover, in order to reduce the conservativeness, some slack matrices are introduced in this paper. Two numerical examples are presented to show the effectiveness and less conservativeness of the proposed method.

The Relations between Parents' Smoking, General Parenting, Parental Smoking Communication, and Adolescents' Smoking

Science.gov (United States)

Harakeh, Zeena; Scholte, Ron H. J.; Vermulst, Ad A.; de Vries, Hein; Engels, Rutger C. M. E.

2010-01-01

The present study examined whether the associations between general parenting practices (i.e., support, behavioral control, and psychological control) and parental smoking on the one hand and older and younger siblings' smoking on the other were mediated by parental smoking communication (i.e., frequency and quality of parent-adolescent…

The impact of parental self-esteem and parental rearing behavior on adolescent attachment to parents

Directory of Open Access Journals (Sweden)

Anbo Yang

2011-06-01

Full Text Available In this study the relationship of parental self-esteem, parental rearing and adolescent adult attachment was investigated. A total 448 senior high school students completed EMBU（Egna Minnen av Barndoms Uppfostran, or ―Own memories of parental rearing‖, Perris et al., 1980, the Experiences in Close Relationships Scale (ECR; Brennan, Clark, &Shaver, 1998, and their parents completed The Rosenberg Self-Esteem Scale (SES; Rosenberg, 1965. The results suggested that parental global self-esteem has no effect on the adolescent attachment to parents. Parental positive rearing behaviors have been significantly associated with avoidance to parents. Furthermore, the negative rearing behaviors, such as paternal denying and rejecting, maternal punitiveness, maternal overinvolved and overprotective behavior, can predict the adolescent avoidance and anxiety to parents.

Parenting stress among parents of children with Neurodevelopmental Disorders.

Science.gov (United States)

Craig, Francesco; Operto, Francesca Felicia; De Giacomo, Andrea; Margari, Lucia; Frolli, Alessandro; Conson, Massimiliano; Ivagnes, Sara; Monaco, Marianna; Margari, Francesco

2016-08-30

In recent years, studies have shown that parents of children with Neurodevelopmental Disorders (NDDs) experience more parenting stress than parents of typically developing children, but the relation between the type of disorders and parenting stress is far from clear. The purpose of this study was to compare the parenting stress experienced by parents of 239 children with Specific Learning Disorders (SpLD), Language Disorders (LD), Autism Spectrum Disorder (ASD), Attention Deficit Hyperactivity Disorder (ADHD), and typical development (TD). Parents of children with NDDs experience more parenting stress than those of children who have TD. Although, parents of children with ASD or ADHD report the most high scores of parenting stress, also the parents of children with SpLD or LD report higher parental stress compared with parent of children without NDDs. Another interesting finding was that IQ level or emotional and behavioral problems are associated with the higher levels of parenting stress. This study suggest that parent, both mothers and fathers, of children with different type of NDDs should be provided with interventions and resources to empower them with the knowledge and skills to reduce their stress and to enhance their quality of life. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

Authoritative parenting and parental stress in parents of pre-school and older children with developmental disabilities.

Science.gov (United States)

Woolfson, L; Grant, E

2006-03-01

Rearing a child with a developmental disability is associated with increased parental stress. Theories of stress and adjustment and bi-directional theories of child development suggest that parenting could influence these negative outcomes. Relationships between parenting approaches and stress in parents of children with developmental disabilities (DD) (N = 53) were examined across two age groups, 3-5 years and 9-11 years and compared with a contrast group of typically developing children (TD) (N = 60). Measures used were the Parenting Stress Index-Short Form and Rickel and Biasatti's modification of Block's Child Rearing Practices Report, classified into Baumrind's parenting styles using Reitman and Gross's method. Parents in the older DD group used Authoritative parenting less than parents in the younger DD group, while the opposite developmental pattern was seen in the TD group. Multivariate analysis of variance showed a significant group x parenting style interaction for Parental Distress, Parent-Child Dysfunctional Interaction and Difficult Child. Stress measures were higher for the DD group and seemed to be associated with Authoritative parenting approaches, an effect that was not observed in the TD group. Findings suggest that the well-established effect of group on stress may be moderated by parenting style. Authoritative parenting may be highly stressful for parents of children with DD to implement, resulting in a decrease in its use across the two age groups.

Electronically excited negative ion resonant states in chloroethylenes

Energy Technology Data Exchange (ETDEWEB)

Khvostenko, O.G., E-mail: khv@mail.ru; Lukin, V.G.; Tuimedov, G.M.; Khatymova, L.Z.; Kinzyabulatov, R.R.; Tseplin, E.E.

2015-02-15

Highlights: • Several novel dissociative negative ion channels were revealed in chloroethylenes. • The electronically excited resonant states were recorded in all chloroethylenes under study. • The states were assigned to the inter-shell types, but not to the core-excited Feshbach one. - Abstract: The negative ion mass spectra of the resonant electron capture by molecules of 1,1-dichloroethylene, 1,2-dichloroethylene-cis, 1,2-dichloroethylene-trans, trichloroethylene and tetrachloroethylene have been recorded in the 0–12 eV range of the captured electron energy using static magnetic sector mass spectrometer modified for operation in the resonant electron capture regime. As a result, several novel low-intensive dissociation channels were revealed in the compounds under study. Additionally, the negative ion resonant states were recorded at approximately 3–12 eV, mostly for the first time. These resonant states were assigned to the electronically excited resonances of the inter-shell type by comparing their energies with those of the parent neutral molecules triplet and singlet electronically excited states known from the energy-loss spectra obtained by previous studies.

Delayed hadrons in air showers observed in Chacaltaya

International Nuclear Information System (INIS)

Kakimoto, Fumio

1984-01-01

Bolivian Air Shower Joint Experiment group has studied high energy interaction by measuring the aspect of vertical growth of air showers of 10 16 eV or more at Mt. Chacaltaya Space Physics Observatory at 5200 m above sea level and atmospheric depth of 550 g/cm 2 . The aspect of vertical growth of electrons from about 100 g/cm 2 to about 400 g/cm 2 of atmospheric depth obtained by the measured results of the time of arrival distribution of air Cherenkov radiation at Mt. Chacaltaya agreed with the one predicted from the enhanced 1/2 power of E model. Since the vertical growth of electrons and muons in about 10 17 eV air showers from the atmospheric apex was difficult to give the unified explanation with known interaction models, the University of Tokyo group has proposed a two-component model for air shower growth. If this second component is formed from heavy particles or heavy quantum state as parents, it should be observed as the component which arrives later in air shower. Thus, the measurement and experiment on the delayed hadrons in air showers have been started. In this paper, the experiment, analysis and results are reported. It is clear that the parent particles which caused such a phenomenon were not pions which were multiply generated by the interaction generally known. Therefore, an exact simulating calculation must be performed and compared with the experimental results to obtain the final conclusion from the measured results of this time. (Wakatsuki, Y.)

Synchronization in networks with heterogeneous coupling delays

Science.gov (United States)

Otto, Andreas; Radons, Günter; Bachrathy, Dániel; Orosz, Gábor

2018-01-01

Synchronization in networks of identical oscillators with heterogeneous coupling delays is studied. A decomposition of the network dynamics is obtained by block diagonalizing a newly introduced adjacency lag operator which contains the topology of the network as well as the corresponding coupling delays. This generalizes the master stability function approach, which was developed for homogenous delays. As a result the network dynamics can be analyzed by delay differential equations with distributed delay, where different delay distributions emerge for different network modes. Frequency domain methods are used for the stability analysis of synchronized equilibria and synchronized periodic orbits. As an example, the synchronization behavior in a system of delay-coupled Hodgkin-Huxley neurons is investigated. It is shown that the parameter regions where synchronized periodic spiking is unstable expand when increasing the delay heterogeneity.

Exposure of children with developmental delay to social determinants of poor health: cross-sectional case record review study.

Science.gov (United States)

Emerson, E; Brigham, P

2015-03-01

Research on child development in general has highlighted the importance that the family environment plays in mediating the pathway between exposure to low socio-economic position (SEP) and child well-being. While child developmental models in intellectual disability have highlighted the interplay between social context, family environment and child development, little empirical work has attempted to formally evaluate the evidence in support of specific mediating pathways between low SEP and child outcomes. Secondary analysis of cross-sectional confidentialized needs analysis data collected in three Primary Care Trusts in England covering a total population of 1.25 million people. Case record reviews were undertaken for 46 023 households, 2236 (4.9%) of which contained a child in the target age range with developmental delay. Children with developmental delay, when compared with their non-disabled peers, were at significantly increased risk of poorer health outcomes and of being exposed to a wide range of social determinants of poor health. Controlling for between-group differences in exposure to social determinants of poor health reduced the risk of developmental delay being associated with poorer health outcomes by 45% for behaviour problems and 89% for risk of significant harm. For children with developmental delay, parenting difficulties appears to play a particularly significant role in partially mediating the effects of low SEP. The findings of the present study point to the potential effectiveness of family-focused early intervention to prevent the emergence and escalation of behavioural difficulties and health problems in children with developmental delay. © 2014 John Wiley & Sons Ltd.

What matters most - what parents model or what parents eat?

Science.gov (United States)

Vaughn, Amber E; Martin, Chantel L; Ward, Dianne S

2018-03-28

Parents have a strong influence on their children's eating habits; however, researchers struggle to identify which food parenting practices to recommend. This study examined the influence of parents modeling of healthy eating ("parent role modeling") and parents' actual food intake ("parent dietary intake") on child diet quality, and explored whether these practices work together to influence children's diets. Baseline data from a larger intervention trial were used for this analysis. The sample included parents of preschool-age children from households with at least one overweight parent. The Comprehensive Feeding Practices Questionnaire was used to assess parent modeling of healthy eating ("healthy modeling"). Three days of dietary recalls were used to collect parents' report of their own intake and their children's intake (excluding food at child care). Associations between parent healthy modeling and parent intake of healthy and unhealthy foods were explored using Pearson correlations. Associations between parent healthy modeling and parent Healthy Eating Index (HEI) score on child HEI score were examined with linear regression. Additionally, the interaction between parent healthy modeling and HEI score on child HEI score was tested. Parent healthy modeling was significantly correlated with parent intake of healthy foodsLinear regression showed a significant association between parent modeling and child HEI score, even after controlling for parent diet (β = 3.08, SE = 0.87, p parents had high parent healthy modeling scores had higher HEI scores (mean = 61.5 ± 10.4) regardless of parent HEI score. We did not find evidence that parent healthy modeling and diet quality interact to influence child diet quality. Parents' healthy modeling is an important practice in influencing children's diet quality, possibly more so than the quality of parents' diets. Copyright © 2018. Published by Elsevier Ltd.

Parental divorce and parental death

DEFF Research Database (Denmark)

Marcussen, Jette; Thuen, Frode; Poul, Bruun

2015-01-01

The aim of this review was to identify research on children and adolescents who experience double bereavement, i.e. the experience of loss through parental divorce followed by either parental death or critical illness with imminent death. This knowledge may identify evidence to underpin knowledge......; challenges in both custodial and non-custodial parental death; risk of mental health problems, and the need of support and interventions....

Parenting style, parenting stress, and children's health-related behaviors.

Science.gov (United States)

Park, Hyunjeong; Walton-Moss, Benita

2012-07-01

Parental guidance is critical to the development of children's health-related behaviors. The purpose of this study was to look at the relationship between parenting factors, including parenting style and parenting stress, and children's health-related behaviors. In this descriptive, correlational study, 284 parents of preschool children were interviewed using the Child Rearing Questionnaire and the Korean Parenting Stress Index-Short Form. Parent distress, authoritative and permissive parenting styles, family income, and mother's education were significantly associated with children's health-related behaviors. These findings suggest that higher levels of warmth, characteristics of both parenting styles, may be a critical factor in the development of health-related behaviors.

When a Parent Is Away: Promoting Strong Parent-Child Connections during Parental Absence

Science.gov (United States)

Yeary, Julia; Zoll, Sally; Reschke, Kathy

2012-01-01

How does a parent stay connected with an infant or toddler during a prolonged separation? Research has shown how important early connections are for child development. When a parent is not present physically, there are strategies that military parents have been using to keep a parent and child connected, promoting mindfulness. Because infants and…

Parent training support for intellectually disabled parents.

Science.gov (United States)

Coren, Esther; Hutchfield, Jemeela; Thomae, Manuela; Gustafsson, Carina

2010-06-16

Intellectual disability may impact on an individual's capacity to parent a child effectively. Research suggests that the number of intellectually disabled people with children is increasing. Children of parents with intellectual disabilities may be at increased risk of neglectful care which could lead to health, developmental and behavioural problems, or increased risk of intellectual disability.However, there is some indication that some parents with intellectual disabilities are able to provide adequate child care if they are given appropriate training and support to do so. To assess the effectiveness of parent training interventions to support the parenting of parents with intellectual disabilities We searched the following databases: Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library), MEDLINE, EMBASE, CINAHL, PsycINFO, ASSIA, Sociological Abstracts, Dissertation Abstracts International, MetaRegister of Controlled Trials, and ZETOC. Randomised controlled trials comparing parent training interventions for parents with intellectual disabilities with usual care or with a control group. Outcomes of interest were: the attainment of parenting skills specific to the intervention, safe home practices and the understanding of child health. Two review authors independently assessed risk of bias and undertook data extraction. Three trials met the inclusion criteria for this review but no meta-analysis was possible. One study reported improved maternal-child interaction following group parent training compared with the control group. The second study reported some improvements in parents knowledge of life threatening emergencies, ability to recognise dangers and identify precautions and smaller improvements in their ability to implement precautions, use medicines safely and recognise child illness and symptoms. The third study reported improvement in child care and safety skills following the intervention. There is some risk of bias in the

Stress and coping in parents of children with Prader-Willi syndrome: Assessment of the impact of a structured plan of care.

Science.gov (United States)

Tvrdik, Tatiana; Mason, Debbie; Dent, Karin M; Thornton, Lisa; Hornton, Sidney N; Viskochil, David H; Stevenson, David A

2015-05-01

Hyperphagia, developmental delays, and maladaptive behaviors are common in Prader-Willi syndrome (PWS) likely resulting in heightened parental stress. Objectives were to evaluate stress, describe usefulness of coping behaviors, and assess the impact of a structured Plan of Care (PC) on parents with children with PWS. Parents answered Perceived Stress Scale (PSS-14), Coping Health Inventory for Parents (CHIP), and narrative/demographic surveys. The PC was introduced to a cohort of parents after completion of the PSS-14 and CHIP and re-administered 4-6 month after the introduction of the PC. Higher parental stress (n = 57) was observed compared to the general population, and associated with parent's age, number of children living at home, and child's age and residential setting. "Maintaining family integration, cooperation, and an optimistic definition of the situation" was the most useful coping pattern. Thirty-eight parents answered the PSS-14 and CHIP after the PC. Parental stress decreased after the PC (P = 0.035). Coping behaviors related to "maintaining family integration" increased after the PC (P = 0.042). Women and men preferred different coping patterns before and after the PC. In conclusion, parental stress is increased in PWS, and a PC decreased stress and increased coping behaviors related to family stability for parents with children with PWS. © 2015 Wiley Periodicals, Inc.

Growth recovery in newly arrived international adoptees in Italy: relation to parenting stress.

Science.gov (United States)

Canzi, Elena; Rosnati, Rosa; Miller, Laurie C

2018-04-12

Following initial adversities, most internationally adopted children arrive with significant growth delays. Post-placement recovery has been widely documented, but research about risk or protective factors is still limited. Even less is known about the relationship between growth recovery and the quality of the family environment. 28 children in 26 adoptive families were involved in this longitudinal study. A comprehensive evaluation (including anthropometry, cognitive assessment [using the Leiter International Performance Scale-Revised], and completion by both parents of the Parenting Stress Index - Short Form) was done at arrival of the child, and 1 year later. Results evidenced that on arrival nearly half of children had growth measurements in the normal range. All the children showed a significant recovery in height and weight at 6 and 12 months post-placement. Initial and follow up growth measurements correlated strongly. Growth recovery was related to the age of the child at adoption, the proportion of time the child had resided in institutional care, as well as parenting stress. Results suggested that the higher the parenting stress experienced the less improvements occurred in children: for mothers for height and weight, for fathers for all the growth indicators. Results suggested the critical importance of family factor in influencing children's growth recovery.

Exit points, on plasma, of lost fast ions during NBI in TJ-II

International Nuclear Information System (INIS)

Guasp, J.

1995-01-01

The distribution of the exit points, on plasma border, for the lost fast ions during tangential balanced NBI in TJ-II helical axis Stellarator is theoretically analysed, as well for direct as for delayed losses. The link between, the position of those exit points and the corresponding at birth, orbits and drifts is analysed also. It is shown that such relation is rather independent of beam energy and plasma density and is mainly related to the magnetic configuration characteristics. This study is a needed intermediate step to the analysis of impacts of those ions on the vacuum vessel of TJ-II. (Author) 2 refs

Group Delay of High Q Antennas

DEFF Research Database (Denmark)

Bahramzy, Pevand; Pedersen, Gert Frølund

2013-01-01

Group Delay variations versus frequency is an essential factor which can cause distortion and degradation in the signals. Usually this is an issue in wideband communication systems, such as satellite communication systems, which are used for transmitting wideband data. However, group delay can also...... become an issue, when working with high Q antennas, because of the steep phase shift over the frequency. In this paper, it is measured how large group delay variations can become, when going from a low Q antenna to a high Q antenna. The group delay of a low Q antenna is shown to be around 1.3 ns, whereas...... a high Q antenna has group delay of around 22 ns. It is due to this huge group delay variation characteristics of high Q antennas, that signal distortion might occur in the radio system with high Q antennas....

Parental depressive history, parenting styles, and child psychopathology over 6 years: The contribution of each parent's depressive history to the other's parenting styles.

Science.gov (United States)

Kopala-Sibley, Daniel C; Jelinek, Caitlin; Kessel, Ellen M; Frost, Allison; Allmann, Anna E S; Klein, Daniel N

2017-10-01

The link between parental depressive history and parenting styles is well established, as is the association of parenting with child psychopathology. However, little research has examined whether a depressive history in one parent predicts the parenting style of the other parent. As well, relatively little research has tested transactional models of the parenting-child psychopathology relationship in the context of parents' depressive histories. In this study, mothers and fathers of 392 children were assessed for a lifetime history of major depression when their children were 3 years old. They then completed measures of permissiveness and authoritarianism and their child's internalizing and externalizing symptoms when children were 3, 6, and 9 years old. The results showed that a depressive history in one parent predicted the other parent's permissiveness. Analyses then showed that child externalizing symptoms at age 3 predicted maternal permissiveness and authoritarianism and paternal permissiveness at age 6. Maternal permissiveness at age 6 predicted child externalizing symptoms at age 9. No relationships in either direction were found between parenting styles and child internalizing symptoms. The results highlight the importance of considering both parents' depressive histories when understanding parenting styles, and support transactional models of parenting styles and child externalizing symptoms.

Family and relationship influences on parenting behaviors of young parents.

Science.gov (United States)

Kershaw, Trace; Murphy, Alexandrea; Lewis, Jessica; Divney, Anna; Albritton, Tashuna; Magriples, Urania; Gordon, Derrick

2014-02-01

Assess the influence of relationship and family factors during pregnancy on parenting behavior 6 months postpartum among low-income young parents. Some 434 young expectant couples were recruited from obstetrics clinics during pregnancy and followed 6 months postpartum. Using a series of general estimating equations to control for the correlated nature of the data, we assessed the influence of relationship factors (e.g., relationship satisfaction, attachment) and family factors (e.g., family functioning, family history) during pregnancy on parenting (e.g., parenting involvement, time spent caregiving, parenting experiences, and parenting sense of competence) 6 months postpartum controlling for covariates. Relationship functioning related to parenting involvement, caregiving, parenting experiences, and parenting sense of competence. In addition, several family factors related to parenting. Mother involvement during childhood was related to more parenting involvement, parenting positive experiences, and parenting sense of competence. History of being spanked as a child related to less time spent caregiving and less positive life change from being a parent. Further, gender significantly moderated the associations between relationship and family factors and parenting behavior. Male parenting behavior was more influenced by relationship and family factors than female parenting. This study suggests the importance of relationship and family contexts for parenting behaviors of young mothers and fathers, highlighting the potential utility of involving both young mothers and fathers in parenting programs, and developing interventions that focus on strengthening young parents' romantic relationships and that address negative parenting experienced during childhood. Copyright © 2014 Society for Adolescent Health and Medicine. Published by Elsevier Inc. All rights reserved.

Realization of double-pulse laser irradiating scheme for laser ion sources

International Nuclear Information System (INIS)

Li Zhangmin; Jin Qianyu; Liu Wei; Zhang Junjie; Sha Shan; Zhao Huanyu; Sun Liangting; Zhang Xuezhen; Zhao Hongwei

2015-01-01

A double-pulse laser irradiating scheme has been designed and established for the production of highly charged ion beams at Institute of Modern Physics (IMP), Chinese Academy of Sciences. The laser beam output by a Nd : YAG laser is split and combined by a double of beam splitters, between which the split laser beams are transmitted along different optical paths to get certain time delay between each other. With the help of a quarter-wave plate before the first splitter, the energy ratio between the two laser pulses can be adjusted between 3 : 8 to 8 : 3. To testify its feasibility, a preliminary experiment was carried out with the new-developed double-pulse irradiating scheme to produce highly charged carbon ions. Comparing the results with those got from the previous single-pulse irradiating scheme, the differences in the time structure and Charge State Distribution (CSD) of the ion pulse were observed, but its mechanisms and optimization require further studies. (authors)

Puntos Basicos para Padres: Apoyo Padre a Padre (Basics for Parents: Parent to Parent Support).

Science.gov (United States)

Santelli, Betsy

This Spanish language information brief describes the Parent to Parent Program, which provides information and one-to-one emotional support to parents of children with special needs. The program trains experienced parents in the program and matches them with similar parents new to the program. Benefits of the program include: (1) providing parents…

Linear rotary optical delay lines

Science.gov (United States)

Guerboukha, Hichem; Qu, Hang; Skorobogatiy, Maksim

2016-03-01

We present a semi-analytical solution for the design of a high-speed rotary optical delay line that use a combination of two rotating curvilinear reflectors. We demonstrate that it is possible to design an infinite variety of the optical delay lines featuring linear dependence of the optical delay on the rotation angle. This is achieved via shape optimization of the rotating reflector surfaces. Moreover, a convenient spatial separation of the incoming and outgoing beams is possible. For the sake of example, we present blades that fit into a circle of 10cm diameter. Finally, a prototype of a rotary delay line is fabricated using CNC machining, and its optical properties are characterized.

Synchronization of nonidentical chaotic neural networks with leakage delay and mixed time-varying delays

Directory of Open Access Journals (Sweden)

Cao Jinde

2011-01-01

Full Text Available Abstract In this paper, an integral sliding mode control approach is presented to investigate synchronization of nonidentical chaotic neural networks with discrete and distributed time-varying delays as well as leakage delay. By considering a proper sliding surface and constructing Lyapunov-Krasovskii functional, as well as employing a combination of the free-weighting matrix method, Newton-Leibniz formulation and inequality technique, a sliding mode controller is designed to achieve the asymptotical synchronization of the addressed nonidentical neural networks. Moreover, a sliding mode control law is also synthesized to guarantee the reachability of the specified sliding surface. The provided conditions are expressed in terms of linear matrix inequalities, and are dependent on the discrete and distributed time delays as well as leakage delay. A simulation example is given to verify the theoretical results.

Synchronization of Markovian jumping stochastic complex networks with distributed time delays and probabilistic interval discrete time-varying delays

International Nuclear Information System (INIS)

Li Hongjie; Yue Dong

2010-01-01

The paper investigates the synchronization stability problem for a class of complex dynamical networks with Markovian jumping parameters and mixed time delays. The complex networks consist of m modes and the networks switch from one mode to another according to a Markovian chain with known transition probability. The mixed time delays are composed of discrete and distributed delays, the discrete time delay is assumed to be random and its probability distribution is known a priori. In terms of the probability distribution of the delays, the new type of system model with probability-distribution-dependent parameter matrices is proposed. Based on the stochastic analysis techniques and the properties of the Kronecker product, delay-dependent synchronization stability criteria in the mean square are derived in the form of linear matrix inequalities which can be readily solved by using the LMI toolbox in MATLAB, the solvability of derived conditions depends on not only the size of the delay, but also the probability of the delay-taking values in some intervals. Finally, a numerical example is given to illustrate the feasibility and effectiveness of the proposed method.

Good-parent beliefs of parents of seriously ill children.

Science.gov (United States)

Feudtner, Chris; Walter, Jennifer K; Faerber, Jennifer A; Hill, Douglas L; Carroll, Karen W; Mollen, Cynthia J; Miller, Victoria A; Morrison, Wynne E; Munson, David; Kang, Tammy I; Hinds, Pamela S

2015-01-01

Parents' beliefs about what they need to do to be a good parent when their children are seriously ill influence their medical decisions, and better understanding of these beliefs may improve decision support. To assess parents' perceptions regarding the relative importance of 12 good-parent attributes. A cross-sectional, discrete-choice experiment was conducted at a children's hospital. Participants included 200 parents of children with serious illness. Ratings of 12 good-parent attributes, with subsequent use of latent class analysis to identify groups of parents with similar ratings of attributes, and ascertainment of whether membership in a particular group was associated with demographic or clinical characteristics. The highest-ranked good-parent attribute was making sure that my child feels loved, followed by focusing on my child's health, making informed medical care decisions, and advocating for my child with medical staff. We identified 4 groups of parents with similar patterns of good-parent-attribute ratings, which we labeled as: child feels loved (n=68), child's health (n=56), advocacy and informed (n=55), and spiritual well-being (n=21). Compared with the other groups, the child's health group reported more financial difficulties, was less educated, and had a higher proportion of children with new complex, chronic conditions. Parents endorse a broad range of beliefs that represent what they perceive they should do to be a good parent for their seriously ill child. Common patterns of how parents prioritize these attributes exist, suggesting future research to better understand the origins and development of good-parent beliefs among these parents. More important, engaging parents individually regarding what they perceive to be the core duties they must fulfill to be a good parent may enable more customized and effective decision support.

Infrared spectra of small molecular ions trapped in solid neon

Energy Technology Data Exchange (ETDEWEB)

Jacox, Marilyn E. [Optical Technology Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 (United States)

2015-01-22

The infrared spectrum of a molecular ion provides a unique signature for that species, gives information on its structure, and is amenable to remote sensing. It also serves as a comparison standard for refining ab initio calculations. Experiments in this laboratory trap molecular ions in dilute solid solution in neon at 4.2 K in sufficient concentration for observation of their infrared spectra between 450 and 4000 cm{sup !1}. Discharge-excited neon atoms produce cations by photoionization and/or Penning ionization of the parent molecule. The resulting electrons are captured by other molecules, yielding anions which provide for overall charge neutrality of the deposit. Recent observations of ions produced from C{sub 2}H{sub 4} and BF{sub 3} will be discussed. Because of their relatively large possibility of having low-lying excited electronic states, small, symmetric molecular cations are especially vulnerable to breakdown of the Born-Oppenheimer approximation. Some phenomena which can result from this breakdown will be discussed. Ion-molecule reaction rates are sufficiently high that in some systems absorptions of dimer cations and anions are also observed. When H{sub 2} is introduced into the system, the initially-formed ion may react with it. Among the species resulting from such ion-molecule reactions that have recently been studied are O{sub 4}{sup +}, NH{sub 4}{sup +}, HOCO{sup +}, and HCO{sub 2}{sup !}.