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A formulation of a digital filter method for computing the forced response of a linear MDOF mechanical system is proposed. It is shown how aliasing error effects can be avoided at the expense of a bias error. The bias error is however completely known and it is system independent, as it only depends on the sampling frequency used. The mechanical system is described by its modal parameters, poles and residues. The method is extended to include non-linear elements. A toolbox in MATLAB has been created where nonlinear elements with and without memory can be treated, as well as system described by coupled non-linear equations.

06-1755 Josefsson, A., M. Magnevall, and K. Ahlin. Control algorithm for sine excitation on nonlinear systems. Proceedings of the 24th International Modal Analysis Conference, St. Louis, Missouri, United States: 148, [...]

06-1756 Magnevall, M., A. Josefsson, and K. Ahlin. Experimental verification of a control algorithm for nonlinear systems. Proceedings of the Twelfth International Congress on Sound and Vibration, Lisbon, Portugal: 147, [...]

The objectives of this study were to examine the prevalence of race-based disparities in cognitive problems, functional limitations (FLs), and activity of daily living (ADL) limitations between US Black and White older adults in 2008 and 2017, to explore how age, sex, income, and education attenuate these racial disparities, and to determine if Black-White health disparities are narrowing. Secondary analysis of the nationally representative American Community Surveys including 423,066 respondents aged ≥65 (388,602 White, 34,464 Black) in 2008 and 536,984 (488,483 White, 48,501 Black) in 2017. Findings indicate that Black-White racial disparities were apparent for all three outcomes in 2008 and 2017. Approximately half of the racial disparities was attenuated when adjustments were made for education and income. Racial disparities in cognition declined between 2008 and 2017 ( p  < .001) but persisted unabated in FLs and ADL limitations. Further exploration on the mechanisms of racial disparities is warranted., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

This study presents the results from a demonstration of a tool for self-estimation of digital competence for nurses and assistant nurses. The data was gathered from twelve participants working as leaders of older care homes. The results show that digital competence is of importance in health and social care, that the dimension of motivation is of utmost importance and that the presentation of the survey results should be flexible.

The Internet of Things (IoT) is a source of knowledge about the surrounding environment and people in such an environment. The insights collected by IoT can provide the knowledge needed to improve people's health and overall well-being. Schools are one environment where IoT is scarcely applied, yet, it is expected that this is where children and teenagers spend most of their time. Drawing on previous findings, this paper presents preliminary results from qualitative inquiry investigating how and what IoT-based solutions could support health and well-being in elementary educational settings.

We propose a tentative research plan to increase students' mental health in elementary schools by implementing Internet of Things (IoT) technology. The research plan should answer how to support students' mental health using IoT solutions and the critical factors influencing testbeds for IoT solutions with the previously mentioned purpose. Our intended research method is Design Science, which we plan to use stepwise.

Introduction: Antecedents of accompanying impairments in cerebral palsy and their relation to neuroimaging patterns need to be explored., Material and Methods: A population-based study of 309 children with cerebral palsy born at term between 1983 and 1994. Prepartum, intrapartum, and postpartum variables previously studied as antecedents of cerebral palsy type and motor severity were analyzed in children with cerebral palsy and cognitive impairment and/or epilepsy, and in children with cerebral palsy without these accompanying impairments. Neuroimaging patterns and their relation to identified antecedents were analyzed. Data were retrieved from the cerebral palsy register of western Sweden, and from obstetric and neonatal records., Results: Children with cerebral palsy and accompanying impairments more often had low birthweight (kg) (odds ratio 0.5, 95% confidence interval 0.3-0.8), brain maldevelopment known at birth (p = 0.007, odds ratio ∞) and neonatal infection (odds ratio 5.4, 95% confidence interval 1.04-28.4). Moreover, neuroimaging patterns of maldevelopment (odds ratio 7.2, 95% confidence interval 2.9-17.2), cortical/subcortical lesions (odds ratio 5.3, 95% confidence interval 2.3-12.2) and basal ganglia lesions (odds ratio 7.6, 95% confidence interval 1.4-41.3) were more common, wheras white matter injury was found significantly less often (odds ratio 0.2, 95% confidence interval 0.1-0.5). In most children with maldevelopment, the intrapartum and postpartum periods were uneventful (p < 0.05). Cerebral maldevelopment was associated with prepartum antecedents, whereas subcortical/cortical and basal ganglia lesions were associated with intrapartum and postpartum antecedents., Conclusion: No additional factor other than those related to motor impairment was associated with epilepsy and cognitive impairment in cerebral palsy. Timing of antecedents deemed important for the development of cerebral palsy with accompanying impairments were supported by neuroimaging patterns., (© 2017 Nordic Federation of Societies of Obstetrics and Gynecology.)

Introduction: The purpose of this study was to determine whether antecedents and neuroimaging patterns vary according to the severity of motor impairment in children with cerebral palsy., Material and Methods: A population-based study in which all 309 term-born children with spastic and dyskinetic cerebral palsy born between 1983 and 1994 and 618 matched controls were studied. Antecedents were retrieved from obstetric records. Information on neuroimaging was retrieved from the cerebral palsy Register of Western Sweden. Cases were grouped by severity of motor impairment: mild (walks without aids), moderate (walks with aids) or severe (dependent on wheelchair). Binary logistic regression, the Cochran-Armitage test for trends, interaction analyses and interrelationship analyses were performed., Results: Antecedents associated with mild motor impairment were antepartum (placental weight, maternal weight and antibiotic therapy) or intrapartum and postpartum adverse events (meconium-stained amniotic fluid, low Apgar score, admission to neonatal intensive care unit and neonatal encephalopathy). Antecedents associated with severe motor impairment were antepartum (congenital infection, small head circumference and brain maldevelopment) or intrapartum and postpartum (emergency cesarean section and maternal antibiotic therapy). Comparisons between mild and severe motor impairment revealed congenital infection, maldevelopment, neonatal encephalopathy and meconium aspiration syndrome significantly more often in the group with severe motor impairment (p < 0.05). White matter injury was the most common neuroimaging pattern in mild motor impairment, whereas maldevelopment and cortical/subcortical lesions were most common in the severe motor impairment group., Conclusions: Our results suggest a variation in antecedents associated with cerebral palsy, related to severity of motor impairment. Timing of antecedents corresponded to neuroimaging patterns., (© 2016 Nordic Federation of Societies of Obstetrics and Gynecology.)

Objective: To investigate the link between infection-related risk factors for cerebral palsy subtypes in children born at term., Methods: A case-control study was performed in a population-based series of children with cerebral palsy born at term (n=309) matched with a control group (n=618). The cases were divided into cerebral palsy subtypes: spastic hemiplegia, spastic diplegia, spastic tetraplegia, and dyskinetic cerebral palsy. All forms of spastic cerebral palsy were also analyzed together. All records were examined for maternal and neonatal signs of infection. Univariate and adjusted analyses were performed., Results: Infection-related risk factors were shown to be independent risk factors for spastic cerebral palsy in the adjusted analyses. This was especially pronounced in the subgroup with spastic hemiplegia in which bacterial growth in urine during pregnancy (n=11 [7.5%], odds ratio [OR] 4.7, 95% confidence interval [CI] 1.5-15.2), any infectious disease during pregnancy (n=57 [39.0%], OR 2.9, 95% CI 1.7-4.8), severe infection during pregnancy (n=12 [8.2%], OR 15.4, 95% CI 3.0-78.1), antibiotic therapy once during pregnancy (n=33 [22.6%], OR 6.3, 95% CI 3.0-15.2) as well as several times during pregnancy (n=9 [6.2%], OR 15.6, 95% CI 1.8-134.2) constituted strong independent risk factors. However, only neonatal infection (n=11 [9.1%], OR 14.7, 95% CI 1.7-126.5) was independently significantly associated with an increased risk of spastic diplegia and tetraplegia., Conclusions: Infection-related factors are strong independent risk factors for the subgroup with spastic hemiplegia in children with cerebral palsy born at term. The finding is less pronounced in the subgroups with spastic diplegia or tetraplegia., Level of Evidence: II.

The voltage-gated sodium channel Na(V)1.7 is believed to be a critical mediator of pain sensation based on clinical genetic studies and pharmacological results. Clinical utility of nonselective sodium channel blockers is limited due to serious adverse drug effects. Here, we present the optimization, structure-activity relationships, and in vitro and in vivo characterization of a novel series of Na(V)1.7 inhibitors based on the oxoisoindoline core. Extensive studies with focus on optimization of Na(V)1.7 potency, selectivity over Na(V)1.5, and metabolic stability properties produced several interesting oxoisoindoline carboxamides (16A, 26B, 28, 51, 60, and 62) that were further characterized. The oxoisoindoline carboxamides interacted with the local anesthetics binding site. In spite of this, several compounds showed functional selectivity versus Na(V)1.5 of more than 100-fold. This appeared to be a combination of subtype and state-dependent selectivity. Compound 28 showed concentration-dependent inhibition of nerve injury-induced ectopic in an ex vivo DRG preparation from SNL rats. Compounds 16A and 26B demonstrated concentration-dependent efficacy in preclinical behavioral pain models. The oxoisoindoline carboxamides series described here may be valuable for further investigations for pain therapeutics.

Objective: The objective of this study was to describe how women handle necessary lifestyle changes due to a chronic disease using diabetes as a model., Design: Interview study., Setting: Ten women living in western Sweden were interviewed., Method: In-depth interviews and analysis were performed using the phenomenological ideas of Giorgi., Subjects: Ten women diagnosed with type 2 diabetes, mean age 65. All were either on disability pension or retired with varying complications ranging from none to stroke., Results: The findings revealed five themes: the ambiguous feeling of others' involvement, becoming a victim of pressurizing demands, experiencing knowledge deficits, experiencing an urge, and finding reasons to justify not changing. The invariant meaning of a continuous inner struggle illuminates the experience of making lifestyle changes for women with type 2 diabetes., Conclusion: The findings of the present study show that it is vital for health care professionals to treat women diagnosed with type 2 diabetes with great respect and understanding regarding the struggle that they are going through. By being aware of the everyday burden for these women, acknowledging the fact that they want their lives to go on as before, may serve as a "key" to assist women in changing attitudes towards living in accordance with the disease and appreciating the lifestyle changes as a challenge as they become healthier and improve their quality of life.

Objective: To provide an overview of current research on risk factors for cerebral palsy (CP) in children born at term and hypothesize how new findings can affect the content of the CP registers worldwide., Design: A systematic search in PubMed for original articles, published from 2000 to 2010, regarding risk factors for CP in children born at term was conducted., Methods: Full text review was made of 266 articles., Main Outcome Measures: Factors from the prenatal, perinatal and neonatal period considered as possible contributors to the causal pathway to CP in children born at term were regarded as risk factors., Results: Sixty-two articles met the criteria for an original report on risk factors for CP in children born at term. Perinatal adverse events, including stroke, were the focus of most publications, followed by genetic studies. Malformations, infections, perinatal adverse events and multiple gestation were risk factors associated with CP. The evidence regarding, for example, thrombophilic factors and non-CNS abnormalities was inconsistent., Conclusions: Information on maternal and neonatal infections, umbilical cord blood gases at birth, mode of delivery and placental status should be collected in a standardized way in CP registers. Information on social factors, such as education level, family income and area of residence, is also of importance. More research is needed to understand the risk factors of CP and specifically how they relate to causal pathways of cerebral palsy., (© 2011 The Authors Acta Obstetricia et Gynecologica Scandinavica© 2011 Nordic Federation of Societies of Obstetrics and Gynecology.)

Background: Although cardiac myocytes and coronary vascular endothelium are known to express a constitutive form of NO synthase, the in vivo effects of tonic endogenous production of NO on myocardial O2 consumption and contractile performance remain unclear., Methods and Results: The effects of blockade of NO synthase were determined in intact dogs. Myocardial O2 consumption decreased systematically over a wide range of hemodynamic demand after the systemic administration of N omega-nitro-L-arginine methyl ester (L-NAME) or N omega-nitro-L-arginine. Decreases after doses of 1 and 10 mg/kg L-NAME averaged 23 +/- 3.8% and 34 +/- 7.2% at a heart rate of 90 bpm in open-chest animals. Similar reductions occurred after the administration of L-NAME and N omega-nitro-L-arginine in chronically instrumented animals and were unaffected by beta-adrenergic blockade. Intracoronary infusion of L-NAME in chronically instrumented animals reduced both myocardial O2 consumption and regional segment shortening, even at a dose that did not increase systemic arterial pressure., Conclusions: The blockade of NO synthesis reduces myocardial O2 consumption in vivo. The decrease in O2 consumption is accompanied by a decrease in segment shortening. It involves a direct myocardial action of NO, is unaffected by beta-blockade, and is consistent with in vitro studies indicating that low levels of NO augment contractile performance by inhibition of a cGMP-dependent phosphodiesterase.

Objectives: We sought to determine whether endothelium-derived relaxing factor (nitric oxide) exerts a tonic vasodilating effect on coronary collateral channels developed in response to myocardial ischemia., Background: Although the coronary collateral circulation is known to react to several vasoactive agents, the role of endogenously produced nitric oxide is unclear., Methods: Coronary collateral channels were induced in the left circumflex artery bed of 12 chronically instrumented dogs by either ameroid implantation or repeated occlusion of the left circumflex coronary artery. With the native circumflex artery occluded, aortic and circumflex pressures and microsphere flows were measured before and after systemic administration of NG-nitro-L-arginine methyl ester, an arginine analogue known to block the synthesis of nitric oxide., Results: NG-nitro-L-arginine methyl ester increased mean aortic pressure from a mean +/- SEM of 92 +/- 4 to 114 +/- 4 mm Hg, whereas pressure in the occluded circumflex artery decreased from 61 +/- 4 to 55 +/- 4 mm Hg. The increase in aortic-circumflex pressure gradient (from 31 +/- 4 to 59 +/- 5 mm Hg) was accompanied by a decrease in flow in the circumflex bed (from 1.31 to +/- 0.14 to 1.09 +/- 0.15 ml/min per g), resulting in an increase in coronary collateral resistance averaging 173 +/- 37% (from 26 +/- 4 to 64 +/- 9 mm Hg/ml per min per g, p < 0.01). The increase in collateral resistance could be partially reversed by administration of L-arginine., Conclusions: We conclude that nitric oxide normally exerts a substantial tonic dilating effect in coronary collateral vessels. Disease-induced alterations in endothelial function may limit collateral perfusion importantly.

Male and female offspring of rats given antiandrogens, the steroidal BOMT or the non steroids DIMP or Sch 13521, daily during the last third of pregnancy were studied. Detailed examinations were made of the genital tract of male, and of the nipples of male and female offspring. A) Male offspring. 1) Genital tract of newborn and 31-91 day old males : Modifications of the development of accessory sexual tissues were found in all treatment groups. As indicated by the severity of deviations from normal (morphology and weight of sex accessories), the antiandrogenic effect of the preparations, in the doses given to the mother rats, increased from BOMT (50 or 75 mg/day) via Sch 13521 (30 mg/day) and DIMP (50 or 60 mg/day) to Sch 13521 (60 mg/day). 2) Nipples of 10-60 day old males : Whole mount preparations were made unilaterally of the row of 6 mammary glands with nipples. The number of intact and abnormal nipples, respectively, was recorded. The relation between intact and abnormal nipples served as indicator of the efficiency of the antiandrogenic substances studied. The result showed that the antiandrogenic effect increased from BOMT to Sch 13521, 60 mg, in the same order as that arrived at from studies of the genital tract. The combined results obtained from the male offspring indicated that the tissues of the genital region, the growth and differentiation of which was most readily impaired by antiandrogens, were the same as those known from other work to be stimulated most easily in female rat fetuses by testosterone. B) Female offspring. Nipples of 31-60 day old females were judged from whole mount preparations and recorded as in the males. The nipples of adult virginal females were examined macroscopically. The same procedure was applied to lactating females, but the results were controlled in consecutive lactational periods and at autopsy. The 3 groups of females showed uniformly that 1) offspring of rats given BOMT during pregnancy had many (about 50 per cent) malformed nipples and 2) the treatment of mother rats with DIMP or Sch 13521 did not influence the development of nipples in female offspring. The result was assumed to be due to an androgenic effect of the steroidal antiandrogen, BOMT, on the nipple anlage.

A within cow comparison was made between milk progesterone levels in healthy and mastitic quarters. Material was collected from cows with mastitis induced by bacterial inoculation, or by inoculation with bacterial endotoxin. Furthermore material from cows with spontaneous subclinical mastitis was used. Milk progesterone levels were lowered due to mastitis. However, the decrease was not large enough to cause misinterpretation of where in the oestrous cycle (luteal phase or non-luteal phase) the samples were taken.

Milk progesterone profiles, based on twice or once weekly sampling, were constructed for postpartum dairy cows. The cows were simultaneously examined by rectal palpation and clinical ovarian findings were related to the progesterone profiles. The combination of progesterone analysis and clinical examination may be used to optimize diagnostic accuracy and a number of practical recommendations are given on the basis of the results from this study.