Negotiation of poor ground in an undersea tunnel

The 2.65 km Gwithian outfall tunnel formed part of the tunnelling operations under the 'Clean Sweep' sewage/sewerage distribution system upgrade within the South West Region during the 1990's. The 3.0 m high by 2.8 m wide rectangular, tracked-tunnel was constructed by Trafalgar House Construction using drill and blast techniques to intercept a series of pre-drilled diffuser units 25 m below the sea-bed in St Ives Bay. In view of the close proximity to the sea-bed, and the risk of water ingress, systematic probe drilling was performed at regular intervals during construction. Where necessary, in order to reduce the water-make to within pre-defined limits, cementitious grouting of the ground ahead of the advancing face was undertaken. One major fault zone required extensive grouting, as initial probe holes were making in the order of 200 gallons per minute. Tunnel advance through exceptionally poor ground required modification to the excavation methodology and implementation of additional support measures. Evaluation of geotechnical data from the undersea tunnel suggests that the Q-system provided a sound basis for assessment of rock quality and for guidance on associated support requirements. Good correlation was obtained between mapped Qvalues and tunnel advance rates. Importantly, engineering judgement informed final support recommendations

Evaluation of changes in postnatal care using the "Parents' Postnatal Sense of Security" instrument and an assessment of the instrument's reliability and validity

<p>Abstract</p> <p>Background</p> <p>A sense of security is important for experiences of parenthood in the early postpartum period. The objectives of this study were to evaluate two models of postnatal care using a questionnaire incorporating the Parents' Postpartum Sense of Security (<it>PPSS</it>) instrument and to test the validity of the <it>PPSS </it>instrument.</p> <p>Methods</p> <p>Postal surveys were sent to 234 mothers who had experienced two different forms of postnatal care (study group and control group) and returned by 86.8%. These two groups of mothers were compared for total scores on the <it>PPSS </it>instrument. Demographic variables and mothers' opinions about care interventions were also compared and these variables were tested for correlations with the total <it>PPSS </it>score. A regression analysis was carried out to assess areas of midwifery care which might affect a sense of security. The internal consistency and concurrent validity of the instrument were tested for the total population.</p> <p>Results</p> <p>there were no significant differences between the groups for scores on the <it>PPSS </it>instrument. A total of three variables predicted 26% of the variability on the <it>PPSS </it>scores for the study group and five variables predicted 37% of the variability in the control group. One variable was common to both: "<it>The midwives on the postnatal ward paid attention to the mother as an individual"</it>. There were significant correlations between the total <it>PPSS </it>scores and scores for postpartum talks and visits to the breastfeeding clinic. There was also a significant correlation between the single question: "<it>I felt secure during the first postpartum week</it>" and the total <it>PPSS </it>score. Tests for internal consistency and concurrent validity were satisfactory.</p> <p>Conclusion</p> <p>The proposed new model of care neither improved nor impaired mothers' feelings of security the week following birth. Being seen as an individual by the midwife who provides postnatal care may be an important variable for mothers' sense of postnatal security. It is possible that postpartum talks may encourage the processing of childbirth experiences in a positive direction. Availability of breastfeeding support may also add to a sense of security postpartum. The <it>PPSS </it>instrument has shown acceptable reliability and validity.</p

A systematic review on the effectiveness of physical and rehabilitation interventions for chronic non-specific low back pain

Low back pain (LBP) is a common and disabling disorder in western society. The management of LBP comprises a range of different intervention strategies including surgery, drug therapy, and non-medical interventions. The objective of the present study is to determine the effectiveness of physical and rehabilitation interventions (i.e. exercise therapy, back school, transcutaneous electrical nerve stimulation (TENS), low level laser therapy, education, massage, behavioural treatment, traction, multidisciplinary treatment, lumbar supports, and heat/cold therapy) for chronic LBP. The primary search was conducted in MEDLINE, EMBASE, CINAHL, CENTRAL, and PEDro up to 22 December 2008. Existing Cochrane reviews for the individual interventions were screened for studies fulfilling the inclusion criteria. The search strategy outlined by the Cochrane Back Review Groups (CBRG) was followed. The following were included for selection criteria: (1) randomized controlled trials, (2) adult (≥18 years) population with chronic (≥12 weeks) non-specific LBP, and (3) evaluation of at least one of the main clinically relevant outcome measures (pain, functional status, perceived recovery, or return to work). Two reviewers independently selected studies and extracted data on study characteristics, risk of bias, and outcomes at short, intermediate, and long-term follow-up. The GRADE approach was used to determine the quality of evidence. In total 83 randomized controlled trials met the inclusion criteria: exercise therapy (n = 37), back school (n = 5), TENS (n = 6), low level laser therapy (n = 3), behavioural treatment (n = 21), patient education (n = 1), traction (n = 1), and multidisciplinary treatment (n = 6). Compared to usual care, exercise therapy improved post-treatment pain intensity and disability, and long-term function. Behavioural treatment was found to be effective in reducing pain intensity at short-term follow-up compared to no treatment/waiting list controls. Finally, multidisciplinary treatment was found to reduce pain intensity and disability at short-term follow-up compared to no treatment/waiting list controls. Overall, the level of evidence was low. Evidence from randomized controlled trials demonstrates that there is low quality evidence for the effectiveness of exercise therapy compared to usual care, there is low evidence for the effectiveness of behavioural therapy compared to no treatment and there is moderate evidence for the effectiveness of a multidisciplinary treatment compared to no treatment and other active treatments at reducing pain at short-term in the treatment of chronic low back pain. Based on the heterogeneity of the populations, interventions, and comparison groups, we conclude that there are insufficient data to draw firm conclusion on the clinical effect of back schools, low-level laser therapy, patient education, massage, traction, superficial heat/cold, and lumbar supports for chronic LBP

A systematic review of mental disorder, suicide, and deliberate self harm in lesbian, gay and bisexual people

Background: Lesbian, gay and bisexual (LGB) people may be at higher risk of mental disorders than heterosexual people.Method: We conducted a systematic review and meta-analysis of the prevalence of mental disorder, substance misuse, suicide, suicidal ideation and deliberate self harm in LGB people. We searched Medline, Embase, PsycInfo, Cinahl, the Cochrane Library Database, the Web of Knowledge, the Applied Social Sciences Index and Abstracts, the International Bibliography of the Social Sciences, Sociological Abstracts, the Campbell Collaboration and grey literature databases for articles published January 1966 to April 2005. We also used Google and Google Scholar and contacted authors where necessary. We searched all terms related to homosexual, lesbian and bisexual people and all terms related to mental disorders, suicide, and deliberate self harm. We included papers on population based studies which contained concurrent heterosexual comparison groups and valid definition of sexual orientation and mental health outcomes.Results: Of 13706 papers identified, 476 were initially selected and 28 (25 studies) met inclusion criteria. Only one study met all our four quality criteria and seven met three of these criteria. Data was extracted on 214,344 heterosexual and 11,971 non heterosexual people. Meta-analyses revealed a two fold excess in suicide attempts in lesbian, gay and bisexual people [ pooled risk ratio for lifetime risk 2.47 (CI 1.87, 3.28)]. The risk for depression and anxiety disorders (over a period of 12 months or a lifetime) on meta-analyses were at least 1.5 times higher in lesbian, gay and bisexual people (RR range 1.54-2.58) and alcohol and other substance dependence over 12 months was also 1.5 times higher (RR range 1.51-4.00). Results were similar in both sexes but meta analyses revealed that lesbian and bisexual women were particularly at risk of substance dependence (alcohol 12 months: RR 4.00, CI 2.85, 5.61; drug dependence: RR 3.50, CI 1.87, 6.53; any substance use disorder RR 3.42, CI 1.97-5.92), while lifetime prevalence of suicide attempt was especially high in gay and bisexual men (RR 4.28, CI 2.32, 7.88).Conclusion: LGB people are at higher risk of mental disorder, suicidal ideation, substance misuse, and deliberate self harm than heterosexual people

Scaffolding in teacher-student interaction: a decade of Research

Although scaffolding is an important and frequently studied concept, much discussion exists with regard to its conceptualizations, appearances, and effectiveness. Departing from the last decade’s scaffolding literature, this review scrutinizes these three areas of scaffolding. First, contingency, fading, and transfer of responsibility are discerned in this review as the three key characteristics of scaffolding. Second, an overview is presented of the numerous descriptive studies that provided narratives on the appearances of scaffolding and classifications of scaffolding strategies. These strategies are synthesized into a framework for analysis, distinguishing between scaffolding means and intentions. Third, the small number of effectiveness studies available is discussed and the results suggest that scaffolding is effective. However, more research is needed. The main challenge in scaffolding research appears to be its measurement. Based on the encountered and described measurement problems, suggestions for future research are made

Who is holding the baby? Women's experiences of contact with their baby immediately after birth: An Australian population-based survey

BACKGROUND: Seeing and holding their baby immediately after the birth is the pinnacle of the childbearing process for parents. Few studies have examined women's experiences of seeing and holding their baby immediately after birth. We investigated women's experiences of initial contact with their newborns using data from an Australian population-based survey. METHODS: All women who gave birth in September/October in 2007 in two Australian states were mailed questionnaires six months following the birth. Women were asked three questions about early newborn contact including where their baby was held in the first hour after birth and whether they were able to hold their baby as soon and for as long as they liked. We examined the association between model of maternity care and early newborn contact stratified by admission to SCN/NICU. RESULTS: The majority (92%) of women whose babies remained with them reported holding their babies as soon and for as long as they liked in the first hour after birth. However, for women whose babies were admitted to SCN/NICU only a minority (47%) reported this. Women in public models of care (with the exception of primary midwifery care) whose babies remained with them were less likely to report holding their babies as soon and for as long as they liked compared to women in private care. CONCLUSION: Our findings suggest that there is potential to increase the proportion of mothers and fathers who get to hold their baby immediately after the birth by modifying birth suite and operating room practices

Changing models of public antenatal care in Australia: Is current practice meeting the needs of vulnerable populations?

OBJECTIVE: to investigate women's views and experiences of public antenatal care. DESIGN: population-based survey in two states. SETTING: South Australia and Victoria, Australia. PARTICIPANTS: 4366 women surveyed at 5-6 months post partum. FINDINGS: of 8468 eligible women mailed the survey, 52% returned completed questionnaires. Fifty-seven per cent of women (2496/4339) received public antenatal care. Of these, half attended a GP for some/all antenatal visits, 38% attended a public hospital clinic or midwives clinic, and 12% had primary midwife care, mostly in a midwifery group practice. Women with complex needs - young women, those experiencing multiple social health problems, women of non-English speaking background, and women at higher risk of complications in pregnancy - were the least likely to say that care met their needs. Women attending a GP or midwife as a primary caregiver were the most positive about their antenatal care: 69% and 74% respectively describing their antenatal care as 'very good'. Women attending a standard public hospital clinic were the least positive about their antenatal care with only 48% rating their care as 'very good'. Women enroling in GP shared care or attending a midwives clinic at a public hospital gave intermediate ratings. CONCLUSION AND IMPLICATIONS FOR PRACTICE: Models of public antenatal care involving a designated lead primary caregiver (GP or midwife) came closest to meeting women's need for information, individualised care and support

The effect of antenatal lifestyle advice for women who are overweight or obese on secondary measures of neonatal body composition: the LIMIT randomised trial

Video RFA, 12/11/2013 : The garment workers were protesting against poor wages and conditions. * * * Cambodge: un mort lors d'une manifestation réprimée à balles réelles, BFMTV, 12/11/2013