Review of \u3cem\u3eWomen\u27s Health and Social Change.\u3c/em\u3e Ellen Annandale. Reviewed by Marcia Russell.

Book review of Ellen Annandale, Women\u27s Health and Social Change. New York: Routledge, 2009. $45.95 papercover

Compact Ozone Lidar for Atmospheric Ozone and Aerosol Measurements

A small compact ozone differential absorption lidar capable of being deployed on a small aircraft or unpiloted atmospheric vehicle (UAV) has been tested. The Ce:LiCAF tunable UV laser is pumped by a quadrupled Nd:YLF laser. Test results on the laser transmitter demonstrated 1.4 W in the IR and 240 mW in the green at 1000 Hz. The receiver consists of three photon-counting channels, which are a far field PMT, a near field UV PMT, and a green PMT. Each channel was tested for their saturation characteristics

Illegal yet Developmentally Normative: A Descriptive Analysis of Young, Urban Adolescents\u27 Dating and Sexual Behaviour in Cape Town, South Africa

BACKGROUND: In South Africa, it is illegal for adolescents under age 16 years to engage in any sexual behaviour whether kissing, petting, or penetrative sex, regardless of consent. This cross-sectional study investigated the extent to which young adolescents engage in various sexual behaviours and the associations between dating status and sexual behaviours. METHOD: Grade 8 adolescents (N = 474, ages 12--15 years, mean = 14.14 years) recruited from Cape Town schools completed surveys providing information about their sociodemographic backgrounds, dating experience, sexual behaviour, and substance use. RESULTS: Lower hierarchy sexual behaviours, such as kissing (71.4% of girls; 88.4% of boys), were more common than oral (3.9% of girls; 13.8% of boys), vaginal (9.3% of girls; 30.0% of boys), or anal (1.4% of girls; 10.5% of boys) sex. Currently dating girls and boys were more likely to engage in sexual behaviours including several risk behaviours in comparison to their currently non-dating counterparts. These risk behaviours included penetrative sex (21.1% of dating vs. 4.5% of non-dating girls; 49.4% of dating vs. 20.2% of non-dating boys), sex with co-occurring substance use (22.2% of dating vs. 0 non-dating girls; 32.1% of dating vs. 40% of non-dating boys), and no contraceptive use (26.1% of sexually experienced girls; 44.4% of sexually experienced boys). Among girls, there were significant associations between ever having penetrative sex and SES (OR = 2.592, p = 0.017) and never dating (OR = 0.330, p = 0.016). Among boys, there were significant associations between ever having penetrative sex and never dating (OR = 0.162, p = 0.008). Although the currently dating group of young adolescents appear to be a precocious group in terms of risk behaviour relative to the currently non-dating group, teenagers in both groups had experience in the full range of sexual behaviours. CONCLUSIONS: Many young adolescents are engaging in a variety of sexual behaviours ranging from kissing and touching to intercourse. Of particular concern are those engaging in risky sexual behaviour. These findings indicate that adolescents need to be prepared for sexual negotiation and decision-making from an early age through comprehensive and accessible education and health services; sections of current legislation may be a barrier to adopting such policies and practices

Net Shape Spin Formed Cryogenic Aluminum Lithium Cryogenic Tank Domes for Lower Cost Higher Performance Launch Vehicles

With the goal of lower cost (simplified manufacturing and lower part count) and higher performance (higher strength to weight alloys) the NASA Technical Maturation Program in 2006 funded a proposal to investigate spin forming of space launch vehicle cryogenic tank domes. The project funding continued under the NASA Exploration Technology Development Program through completion in FY12. The first phase of the project involved spin forming of eight, 1 meter diameter "path finder" domes. Half of these were processed using a concave spin form process (MT Aerospace, Augsburg Germany) and the other half using a convex process (Spincraft, Boston MA). The convex process has been used to produce the Ares Common Bulkhead and the concave process has been used to produce dome caps for the Space Shuttle light weight external tank and domes for the NASDA H2. Aluminum Lithium material was chosen because of its higher strength to weight ratio than the Aluminum 2219 baseline. Aluminum lithium, in order to obtain the desired temper (T8), requires a cold stretch after the solution heat treatment and quench. This requirement favors the concave spin form process which was selected for scale up. This paper describes the results of processing four, 5.5 meter diameter (upper stage scale) net shaped spin formed Aluminum Lithium domes. In order to allow scalability beyond the limits of foundry and rolling mills (about 12 foot width) the circular blank contained one friction stir weld (heavy lifter scales require a flat blank containing two welds). Mechanical properties data (tensile, fracture toughness, stress corrosion, and simulated service testing) for the parent metal and weld will also be discussed

Illegal yet developmentally normative: a descriptive analysis of young, urban adolescents' dating and sexual behaviour in Cape Town, South Africa

BACKGROUND:In South Africa, it is illegal for adolescents under age 16years to engage in any sexual behaviour whether kissing, petting, or penetrative sex, regardless of consent. This cross-sectional study investigated the extent to which young adolescents engage in various sexual behaviours and the associations between dating status and sexual behaviours.METHOD:Grade 8 adolescents (N=474, ages 12-15years, mean=14.14years) recruited from Cape Town schools completed surveys providing information about their sociodemographic backgrounds, dating experience, sexual behaviour, and substance use. RESULTS: Lower hierarchy sexual behaviours, such as kissing (71.4% of girls; 88.4% of boys), were more common than oral (3.9% of girls; 13.8% of boys), vaginal (9.3% of girls; 30.0% of boys), or anal (1.4% of girls; 10.5% of boys) sex. Currently dating girls and boys were more likely to engage in sexual behaviours including several risk behaviours in comparison to their currently non-dating counterparts. These risk behaviours included penetrative sex (21.1% of dating vs. 4.5% of non-dating girls; 49.4% of dating vs. 20.2% of non-dating boys), sex with co-occurring substance use (22.2% of dating vs. 0 non-dating girls; 32.1% of dating vs. 40% of non-dating boys), and no contraceptive use (26.1% of sexually experienced girls; 44.4% of sexually experienced boys). Among girls, there were significant associations between ever having penetrative sex and SES (OR=2.592, p=0.017) and never dating (OR=0.330, p=0.016). Among boys, there were significant associations between ever having penetrative sex and never dating (OR=0.162, p=0.008). Although the currently dating group of young adolescents appear to be a precocious group in terms of risk behaviour relative to the currently non-dating group, teenagers in both groups had experience in the full range of sexual behaviours. CONCLUSIONS: Many young adolescents are engaging in a variety of sexual behaviours ranging from kissing and touching to intercourse. Of particular concern are those engaging in risky sexual behaviour. These findings indicate that adolescents need to be prepared for sexual negotiation and decision-making from an early age through comprehensive and accessible education and health services; sections of current legislation may be a barrier to adopting such policies and practices

The Iowa Homemaker vol.10, no.1

Home Economics in Denmark by Marguerite Stotts Hopkins, page 1 The Swan Song of the Silk Storm by Clareta Walker, page 2 Follies at I. S. C. by Julia Bourne, page 3 Found – Thirty-five Hours a Week by Ethel Cessna Morgan, page 4 Cannibals Visit the Matrix Table, page 5 4-H Club by Helen Melton, page 6 Watch Out for Measles by Elizabeth Armstrong, page 7 State Association by Marcia E. Turner, page 8 Editorial, page 11 Alumnae News by Dorothy B. Anderson, page 12 Putting Life in the Living Room by Mabel Russell, page 1

Effects of Walnut Consumption on Cognitive Performance in Young Adults

Walnuts contain a number of potentially neuroprotective compounds like vitamin E, folate, melatonin, several antioxidative polyphenols and significant amounts of n-3 α-linolenic fatty acid. The present study sought to determine the effect of walnuts on verbal and non-verbal reasoning, memory and mood. A total of sixty-four college students were randomly assigned to two treatment sequences in a crossover fashion: walnuts-placebo or placebo-walnuts. Baseline data were collected for non-verbal reasoning, verbal reasoning, memory and mood states. Data were collected again after 8 weeks of intervention. After 6 weeks of washout, the intervention groups followed the diets in reverse order. Data were collected once more at the end of the 8-week intervention period. No significant increases were detected for mood, non-verbal reasoning or memory on the walnut-supplemented diet. However, inferential verbal reasoning increased significantly by 11.2 %, indicating a medium effect size (P = 0.009; d = 0.567). In young, healthy, normal adults, walnuts do not appear to improve memory, mood or non-verbal reasoning abilities. However, walnuts may have the ability to increase inferential reasoning

Human malaria diagnosis using a single-step direct-PCR based on the Plasmodium cytochrome oxidase III gene

Background: Nested PCRs based on the Plasmodium 18s-rRNA gene have been extensively used for human malaria diagnosis. However, they are not practical when large quantities of samples need to be processed, further there have been challenges in the performance and when interpreting results, especially when submicroscopic infections are analysed. Here the use of "direct PCR" was investigated with the aim of improving diagnosis in the malaria elimination era.\ud \ud Methods: The performance of the Plasmodium cytochrome oxidase III gene (COX-III) based novel malaria detection strategies (direct nested PCR and direct single PCR) were compared using a 18s-rRNA direct nested PCR as a reference tool. Evaluations were based on sensitivity, specificity and the ability to detect mixed infections using control blood spot samples and field collected blood samples with final species diagnosis confirmation by sequencing.\ud \ud Results: The COX-III direct PCR (limit of detection: 0.6–2 parasites/μL) was more sensitive than the 18s-rRNA direct nested PCR (limit of detection: 2–10 parasites/μL). The COX-III direct PCR identified all 21 positive controls (no mixed infections detected) while the 18s-rRNA direct nested PCR identified 18/21 (including four mixed infections). Different concentrations of simulated mixed infections (Plasmodium vivax and Plasmodium falciparum) suggest that the COX-III direct PCR detects only the predominant species. When the 18s-rRNA direct nested PCR was used to detect Plasmodium in field collected bloods spots (n = 3833), there was discrepancy in the results from the genus PCR (16 % positive) and the species-specific PCR (5 % positive). Further, a large portion of a subset of these positive samples (93 % for genus and 60 % for P. vivax), did not align with Plasmodium sequences. In contrast, the COX-III direct PCR clearly identified (single bands confirmed with sequencing) 2 % positive Plasmodium samples including P. vivax, P. falciparum, Plasmodium malariae and Plasmodium ovale wallikeri.\ud \ud Conclusions: The COX-III single direct PCR is an alternative method for accurate detection of Plasmodium microscopic and submicroscopic infections in humans, especially when a large number of samples require screening. This PCR does not require DNA isolation, is sensitive, quick, produces confident/clear results, identifies all the Plasmodium species infecting humans, and is cost-effective.\u

Combating COVID-19-The role of robotics in managing public health and infectious diseases.

COVID-19 may drive sustained research in robotics to address risks of infectious diseases