Monotonic magnetostriction for nonferromagnetic materials

Monotonic magnetostriction for nonferromagnetic material

Random phase approximation for the anisotropic Heisenberg ferromagnet

Anisotropic Heisenberg ferromagnets in random phase and spin wave approximatio

Solenoid magnetic fields calculated from superposed semi-infinite solenoids

Calculation of a thick solenoid coils magnetic field components is made by a superposition of the fields produced by four solenoids of infinite length and zero inner radius. The field produced by this semi-infinite solenoid is dependent on only two variables, the radial and axial field point coordinates

Intra-household use and acceptability of Ready-to-Use-Supplementary-Foods distributed in Niger between July and December 2010.

Few studies have looked at consumption of Ready-to-Use-Supplementary-Foods (RUSFs) during a nutritional emergency. Here, we describe the use and acceptability of RUSF within households in four districts of the region of Maradi, Niger during large scale preventive distributions with RUSF in 2010 targeted at children 6-35months of age. Our study comprised both quantitative and qualitative components to collect detailed information and to allow in-depth interviews. We performed a cross-sectional survey in 16 villages between two monthly distributions of RUSF (October-November 2010). All households with at least one child who received RUSF were included and a total of 1842 caregivers were interviewed using a structured questionnaire. Focus groups and individual interviews of 128 caregivers were conducted in eight of the selected villages. On average, 24.7% of households reported any sharing of RUSF within the household. Sharing practices outside the household remained rare. Most of the sharing reported occurred among children under 5years of age living in the household. On average, 91% of caregivers in all districts rated the child's appreciation of the products as good or very good. Program planning may need to explicitly accounting for the sharing of products among children under 5 within household

Perceptions of Child Body Size and Health Care Seeking for Undernourished Children in Southern Malawi

Child undernutrition affects millions of children globally, but little is known about the ability of adults to detect different types of child undernutrition in low-income countries. We used focused ethnographic methods to understand how Malawian parents and grandparents describe the characteristics they use to identify good and poor child growth, their actual or preferred patterns of health seeking for undernourished children, and the perceived importance of child undernutrition symptoms in relation to other childhood illnesses. Malawians value adiposity rather than stature in assessing child growth. Symptoms of malnutrition, including wasting and edema, were considered the least severe childhood illness symptoms. Parents delayed health care seeking when a child was ill. When they sought care, it was for symptoms such as diarrhea or fever, and they did not recognize malnutrition as the underlying cause. These findings can be used to tailor strategies for preventing and treating growth faltering in Malawian children

Caregiver behaviors and attitudes in the home use of lipid-based nutrient supplements for treating underweight children in Malawi

Undernutrition is an important public health problem that affects millions of children. It contributes to poor health and mortality and has negative consequences that continue into adulthood. The burden of child undernutrition is highest in sub-Saharan Africa. Strategies for improving nutritional status have usually targeted dietary intake. Providing supplementary or better complementary food is one of the most direct interventions for the problem of child undernutrition. To implement effective supplementary feeding interventions, it is essential to understand the sociocultural and behavioral factors that affect how supplementary foods are used in a particular setting. Such information can be used to design improved supplementary feeding programs. The present study took place in Malawi, a long, narrow landlocked country in southeast Africa with high levels of some forms of child undernutrition. This research was carried out in the same rural area of Mangochi District where clinical trials testing the effectiveness of a new type of supplementary food, lipid-based nutrient supplements (LNS), for treating underweight 6-17-month-olds and for preventing undernutrition were underway. Other members of the research team focused on the growth and development outcomes of children receiving LNS as compared to a common supplement, corn-soy blend (CSB), whereas this research investigated sociocultural aspects of supplementary food use. The study was situated within the positivist scientific tradition and it assessed the feasibility of compliance with supplementary feeding interventions in this setting. Its main aim was to identify caregivers attitudes, practices, and behaviors related to the home use of LNS. We investigated feeding patterns and caregiver behaviors before and during LNS use (n=16), how patterns of LNS use changed over time (n=16), how the supplement was used during illness and convalescence (n=16), and how its use compared to that of CSB (LNS n=85, CSB n=85). Quantitative and qualitative data on mothers attitudes towards LNS and CSB were also obtained (LNS n=249, CSB n=255). Data were collected through direct observations and interviews. The majority of the data were obtained in 2005 and 2006, but interviews on maternal attitudes continued until mid-2008. As compared to feeding practices at baseline and during CSB supplementation, use of LNS did not affect the frequency of feeding solid foods, the number or duration of breastfeeds, or the total amount of time spent feeding the child. When LNS was provided in jars containing a 5-day supply, caregivers first tried giving it in different ways, but after four weeks of use they integrated LNS into their regular feeding regimen by nearly always adding it to porridge. When LNS was provided in packets for daily use, it was more often eaten plain than mixed with porridge. As compared to CSB, LNS was less frequently offered as a meal, caregivers washed their hands less often before feeding it, and it was less likely that some of the supplement was left over at the end of a feeding episode. The same types of behavioral patterns were identified when plain LNS was compared to LNS mixed with porridge, indicating that most of the differences in behaviors during CSB and LNS supplementation were linked to the distinctive behaviors associated with plain LNS. The presence of leftovers at the end of supplementary feeding episodes was associated with low child weight-for-age. LNS consumption was significantly lower on days when the child was ill. The reduction in mean consumption was about 15%. LNS intake was lowest on days with fever, followed by days when the child had diarrhea. There was no difference in LNS intake on convalescent and healthy days. Maternal attitudes towards LNS and CSB were generally similar. Mothers reported that both supplements were highly acceptable, most children adapted to eating them within two weeks, and mothers would be willing to use them again or buy them. Supplements tended to be thought of as food rather than medicine. Mothers whose children were in the LNS group were willing to pay more than those in the CSB group for a one-week supply of the supplement. They were also more likely to say that they would withhold the supplement during cough because the sweetness could worsen symptoms. Maternal education was negatively associated and child s initial weight-for-height z-score was positively associated with maternal attitudes towards withholding of supplements during fever, diarrhea, and cough. Similar attitudes towards LNS and CSB suggest that caregivers would have little trouble adopting LNS, if it were to replace CSB, in supplementary feeding programs. The sweetness of LNS may deter its use during cough, indicating that a less sweet version of LNS might be beneficial in this setting. As use of LNS during illness and convalescence is good, programs could promote its use during these periods as a possible way of maintaining nutritional status. LNS supplementary feeding programs might be able to influence the way the supplements are used by providing clear messages that promote specific caregiver behaviors, such as hand washing before supplement meals and mixing LNS in a small amount of porridge to minimize leftovers.Undernutrition is an important public health problem that affects millions of children. It contributes to poor health and mortality and has negative consequences that continue into adulthood. The burden of child undernutrition is highest in sub-Saharan Africa. Strategies for improving nutritional status have usually targeted dietary intake. Providing supplementary or better complementary food is one of the most direct interventions for the problem of child undernutrition. To implement effective supplementary feeding interventions, it is essential to understand the sociocultural and behavioral factors that affect how supplementary foods are used in a particular setting. Such information can be used to design improved supplementary feeding programs. The present study took place in Malawi, a long, narrow landlocked country in southeast Africa with high levels of some forms of child undernutrition. This research was carried out in the same rural area of Mangochi District where clinical trials testing the effectiveness of a new type of supplementary food, lipid-based nutrient supplements (LNS), for treating underweight 6-17-month-olds and for preventing undernutrition were underway. Other members of the research team focused on the growth and development outcomes of children receiving LNS as compared to a common supplement, corn-soy blend (CSB), whereas this research investigated sociocultural aspects of supplementary food use. The study was situated within the positivist scientific tradition and it assessed the feasibility of compliance with supplementary feeding interventions in this setting. Its main aim was to identify caregivers attitudes, practices, and behaviors related to the home use of LNS. We investigated feeding patterns and caregiver behaviors before and during LNS use (n=16), how patterns of LNS use changed over time (n=16), how the supplement was used during illness and convalescence (n=16), and how its use compared to that of CSB (LNS n=85, CSB n=85). Quantitative and qualitative data on mothers attitudes towards LNS and CSB were also obtained (LNS n=249, CSB n=255). Data were collected through direct observations and interviews. The majority of the data were obtained in 2005 and 2006, but interviews on maternal attitudes continued until mid-2008. As compared to feeding practices at baseline and during CSB supplementation, use of LNS did not affect the frequency of feeding solid foods, the number or duration of breastfeeds, or the total amount of time spent feeding the child. When LNS was provided in jars containing a 5-day supply, caregivers first tried giving it in different ways, but after four weeks of use they integrated LNS into their regular feeding regimen by nearly always adding it to porridge. When LNS was provided in packets for daily use, it was more often eaten plain than mixed with porridge. As compared to CSB, LNS was less frequently offered as a meal, caregivers washed their hands less often before feeding it, and it was less likely that some of the supplement was left over at the end of a feeding episode. The same types of behavioral patterns were identified when plain LNS was compared to LNS mixed with porridge, indicating that most of the differences in behaviors during CSB and LNS supplementation were linked to the distinctive behaviors associated with plain LNS. The presence of leftovers at the end of supplementary feeding episodes was associated with low child weight-for-age. LNS consumption was significantly lower on days when the child was ill. The reduction in mean consumption was about 15%. LNS intake was lowest on days with fever, followed by days when the child had diarrhea. There was no difference in LNS intake on convalescent and healthy days. Maternal attitudes towards LNS and CSB were generally similar. Mothers reported that both supplements were highly acceptable, most children adapted to eating them within two weeks, and mothers would be willing to use them again or buy them. Supplements tended to be thought of as food rather than medicine. Mothers whose children were in the LNS group were willing to pay more than those in the CSB group for a one-week supply of the supplement. They were also more likely to say that they would withhold the supplement during cough because the sweetness could worsen symptoms. Maternal education was negatively associated and child s initial weight-for-height z-score was positively associated with maternal attitudes towards withholding of supplements during fever, diarrhea, and cough. Similar attitudes towards LNS and CSB suggest that caregivers would have little trouble adopting LNS, if it were to replace CSB, in supplementary feeding programs. The sweetness of LNS may deter its use during cough, indicating that a less sweet version of LNS might be beneficial in this setting. As use of LNS during illness and convalescence is good, programs could promote its use during these periods as a possible way of maintaining nutritional status. LNS supplementary feeding programs might be able to influence the way the supplements are used by providing clear messages that promote specific caregiver behaviors, such as hand washing before supplement meals and mixing LNS in a small amount of porridge to minimize leftovers

Drivers of food consumption among overweight mother-child dyads in Malawi

To address the increase in overweight and obesity among mothers and children in sub-Saharan Africa, an understanding of the factors that drive their food consumption is needed. We hypothesized food consumption in Malawi is driven by a combination of factors, including season, food accessibility (area of residence, convenience of purchasing food, female autonomy), food affordability (household resources, food expenditures, household food insecurity), food desirability (taste preferences, body size preferences), demographics, and morbidity. Participants in Lilongwe and Kasungu Districts were enrolled across three types of mother-child dyads: either the mother (n = 120), child (n = 80), or both (n = 74) were overweight. Seven-day dietary intake was assessed using a quantitative food frequency questionnaire during the dry and rainy seasons. Drivers associated with intake of calories, macronutrients, and 11 food groups at p<0.1 in univariate models were entered into separate multivariate linear regression models for each dietary intake outcome. Mother-child dyads with an overweight child had a higher percent of calories from carbohydrates and lower percent of calories from fat compared to dyads with a normal weight child (both p<0.01). These mothers also had the highest intake of grains (p<0.01) and their children had the lowest intake of oil/fat (p = 0.01). Household food insecurity, maternal taste preferences, and maternal body size preferences were the most consistent predictors of food group consumption. Household food insecurity was associated with lower intake of grains, fruits, meat and eggs, oil/fat, and snacks. Maternal taste preferences predicted increased consumption of grains, legumes/nuts, vegetables, fish, and oil/fat. Maternal body size preferences for herself and her child were associated with consumption of grains, legumes/nuts, dairy, and sweets. Predictors of food consumption varied by season, across food groups, and for mothers and children. In conclusion, indicators of food affordability and desirability were the most common predictors of food consumption among overweight mother-child dyads in Malawi