New methods to constrain the radio transient rate: results from a survey of four fields with LOFAR

We report on the results of a search for radio transients between 115 and 190 MHz with the LOw-Frequency ARray (LOFAR). Four fields have been monitored with cadences between 15 min and several months. A total of 151 images were obtained, giving a total survey area of 2275 deg². We analysed our data using standard LOFAR tools and searched for radio transients using the LOFAR Transients Pipeline. No credible radio transient candidate has been detected; however, we are able to set upper limits on the surface density of radio transient sources at low radio frequencies. We also show that low-frequency radio surveys are more sensitive to steep-spectrum coherent transient sources than GHz radio surveys. We used two new statistical methods to determine the upper limits on the transient surface density. One is free of assumptions on the flux distribution of the sources, while the other assumes a power-law distribution in flux and sets more stringent constraints on the transient surface density. Both of these methods provide better constraints than the approach used in previous works. The best value for the upper limit we can set for the transient surface density, using the method assuming a power-law flux distribution, is 1.3 × 10^-3 deg^-2 for transients brighter than 0.3 Jy with a time-scale of 15 min, at a frequency of 150 MHz. We also calculated for the first time upper limits for the transient surface density for transients of different time-scales. We find that the results can differ by orders of magnitude from previously reported, simplified estimates.

Body Mass Index Is Positively Associated with Endometrial Cancer in Chinese Women, Especially Prior to Menopause

Objective: Obesity is a well-known risk factor for developing endometrial cancer. However, the incidence and survival rate of endometrial cancer are associated with ethnicity and geographical area. In addition, whether menopausal status is associated with developing endometrial cancer in obese women and whether obesity is associated with subtypes of endometrial cancer have not been fully investigated. Here, we investigated the effect of BMI on developing endometrial cancer in Chinese women taking into account menopausal status and cancer subtypes.

Methods: Data on 1,127 women with endometrial cancer including body mass index (BMI), age at diagnosis, parity, menopausal status and cancer subtype were collected from the largest obstetrics & gynaecology hospital in China and analysed.

Results: After adjusting for age and parity, the odds for developing endometrial cancer in overweight or obese perimenopausal women was significantly higher than that in women with normal weight (OR=2.6 with 95%CI:1.9-3.5, and OR=3.5 with 95%CI: 2.2-5.4, respectively). The odds of developing endometrial cancer in overweight postmenopausal women were significantly higher than that in women who were normal weight (OR=2.4 with 95%CI: 1.8-3.1), however this was not the case for obese postmenopausal women. We further found that BMI, menopausal status, age and parity were not associated with subtypes of endometrial cancer.

Conclusion: Our data demonstrate that obesity is positively associated with the incidence of developing endometrial cancer in Chinese women, with more significant effects in perimenopausal women.

Prevention of neonatal early onset GBS sepsis: A clear protocol is better than none--or several

Revised New Zealand consensus guidelines on the prevention of early-onset group B streptococcus sepsis in the newborn are presented in this issue of the Journal. We provide some context for these recommendations and discuss issues considered by the multidisciplinary group in formulating the guidelines.

The prevention of early-onset neonatal group B streptococcus infection: New Zealand Consensus Guidelines 2014

AIMS

Group B streptococcal (GBS) disease is the leading cause of early-onset neonatal sepsis in New Zealand. Disease follows vertical transmission of GBS from the mother, which can largely be prevented by intravenous intrapartum antibiotics. A 2004 New Zealand guideline recommended using clinical risk factors to identify mothers who would qualify for intrapartum antibiotics. An expert multidisciplinary group met to reconsider these guidelines in the light of a two year survey of the incidence of early onset GBS neonatal sepsis.

METHODS

Representatives from the New Zealand College of Midwives, the Fetus and Newborn Committee of the Paediatric Society of New Zealand, the Royal New Zealand College of General Practitioners, the New Zealand Committee of the Royal Australian and New Zealand College of Obstetricians and Gynaecologists, the New Zealand sub-Committee of the Australasian Society of Infectious Diseases, and the Canterbury Home Birth Association met to review the literature and the most recent New Zealand data.

RESULTS

The multidisciplinary group noted that the estimated incidence of early-onset GBS sepsis had halved over a 10-year period to be 0.26 per 1,000 live births in 2009-11 and that there were missed opportunities for preventing GBS infection. Consensus was reached that adoption of a national guideline on prevention and management of early onset GBS neonatal sepsis by all practitioners and District Health Boards would have the greatest potential to further reduce the incidence.

CONCLUSION

A risk-based GBS prevention strategy continues to be recommended as being the most clinically and cost effective for the New Zealand context. Universal routine antenatal GBS screening is not recommended.

Chlamydia trachomatis screening in pregnancy in New Zealand: translation of national guidelines into practice

INTRODUCTION: Chlamydia trachomatis (C. trachomatis) is a common sexually transmitted infection (STI), and routine antenatal screening to reduce the risk of vertical transmission is recommended in New Zealand (NZ). AIM: To determine the proportion of pregnant women who have been screened for C. trachomatis in selected hospitals since the 2008 NZ Ministry of Health Chlamydia Management Guidelines were published, and to examine variation by age and ethnicity. METHODS: Clinical audits were undertaken at four NZ hospitals, using electronic databases to determine if C. trachomatis screening had occurred. RESULTS: Only 24%, 31%, 35% and 61% of pregnant women were screened in Tauranga (2010), Auckland (2013), Waikato (2013) and Middlemore (2011) hospitals, respectively. DISCUSSION: Despite increases in the proportion of pregnant women screened in Auckland and Middlemore compared to pre-2008, and higher proportions of young women and Maori women screened, overall antenatal screening for C. trachomatis remains suboptimal. Several strategies are presented to support universal screening in pregnancy, as recommended by the NZ Ministry of Health. KEYWORDS: Chlamydia trachomatis; mass screening; medical audit; pregnancy

Assessment for possible healthcare-associated transmission of a new variant influenza virus--Pennsylvania, August 2011

In August 2011, one of the earliest cases of influenza A(H3N2) variant [A(H3N2)v] virus infection was hospitalized with severe illness. To investigate the potential for healthcare-associated transmission of influenza A(H3N2)v, we evaluated both healthcare providers and patient contacts of the case. We found that healthcare-associated transmission was unlikely.

MESAFace, a graphical interface to analyze the MESA output

MESA (Modules for Experiments in Stellar Astrophysics) has become very popular among astrophysicists as a powerful and reliable code to simulate stellar evolution. Analyzing the output data thoroughly may, however, present some challenges and be rather time-consuming. Here we describe MESAFace, a graphical and dynamical interface which provides an intuitive, efficient and quick way to analyze the MESA output.

NATURE OF PROBLEM

Find a way to quickly and thoroughly analyze the output of a MESA run, including all the profiles, and have an efficient method to produce graphical representations of the data.

SOLUTION METHOD

We created two scripts (to be run consecutively). The first one downloads all the data from a MESA run and organizes the profiles in order of age. All the files are saved as tables or arrays of tables which can then be accessed very quickly by Mathematica. The second script uses the Manipulate function to create a graphical interface which allows the user to choose what to plot from a set of menus and buttons. The information shown is updated in real time. The user can access very quickly all the data from the run under examination and visualize it with plots and tables.

UNUSUAL FEATURES

Moving the slides in certain regions may cause an error message. This happens when Mathematica is asked to read nonexistent data. The error message, however, disappears when the slides are moved back. This issue does not preclude the good functioning of the interface.

ADDITIONAL COMMENTS

The program uses the dynamical capabilities of Mathematica. When the program is opened, Mathematica prompts the user to "Enable Dynamics". It is necessary to accept before proceeding.

RUNNING TIME

Depends on the size of the data downloaded, on where the data are stored (hard-drive or web), and on the speed of the computer or network connection. In general, downloading the data may take from a minute to several minutes. Loading directly from the web is slower. For example, downloading a 200MB data folder (a total of 102 files) with a dual-core Intel laptop, P8700, 2 GB of RAM, at 2.53 GHz took about a minute from the hard-drive and about 23 minutes from the web (with a basic home wireless connection).

A psychotherapy program for soldiers dependents: The effect on recall rates. “They are not going for three weeks and the fighting has already begun!”

Introduction

Deployment to conflict areas poses problems for service families. These stressors pose a high cost from increased rates of marital/family break-up and the impact on operational effectiveness, through early recall from combat zones. Soldiers look forward to a mission whilst partners are more ambivalent. The time before deployment is hard on those who stay behind, who experience high levels of anxiety. Those about to be deployed feel guilty, and have to manage their own anxieties about what the mission will bring - hard work, excitement and danger. Most do not talk about this to their partners, who in turn have to manage their own inner turmoil and worst case ‘fantasies’.

Aims

The project grew from concerns about the welfare of families of deployed army personnel.

Objectives

The project aimed to help them develop a greater capacity to manage, contain and function with these worries. The program provided psychodynamic psychoanalytic practices to a previously neglected group that was not wholly army, but is essential to its well-being.

Methods

The program gave the families a greater understanding of the emotional difficulties faced by their partners before, during and after deployment and lessened the stress in their relationships; strengthening their own and their partners’ sense of self, resilience, and the marital bond.

Results

Usually 3–5% of a unit would be recalled from combat operations, over the duration of a tour, this was reduced to 1%.

Conclusion

A psychotherapy programme for the families of soldiers reduces attrition rates.