Broadband PIFA Rectenna Design for a Multi-Source Energy Harvesting Device

Combining different energy harvesting devices to optimize output power is crucial to the achievement of sustainable energy. This thesis focuses on the design, simulation and fabrication of a broadband Planar Inverted-F Antenna (PIFA) constructed for energy harvesting and its integration with a solar cell. An assessment of available ambient RF energy was performed by surveying power density levels from 700MHz to 18GHz. The measured spectrum was then used to determine the bandwidth for our rectifying antenna. The PIFA design was chosen for its small size and low profile, in order to limit the area covering the solar panel. The purpose of this antenna is to harvest power during the times that solar energy is unavailable. The thorough analysis, design and fabrication specifics of the antenna and its integration with the solar panel are discussed in detail. Future work involving the implementation of a PIFA array to optimize the amount of energy harvested is also presented

Finishing the euchromatic sequence of the human genome

The sequence of the human genome encodes the genetic instructions for human physiology, as well as rich information about human evolution. In 2001, the International Human Genome Sequencing Consortium reported a draft sequence of the euchromatic portion of the human genome. Since then, the international collaboration has worked to convert this draft into a genome sequence with high accuracy and nearly complete coverage. Here, we report the result of this finishing process. The current genome sequence (Build 35) contains 2.85 billion nucleotides interrupted by only 341 gaps. It covers ∼99% of the euchromatic genome and is accurate to an error rate of ∼1 event per 100,000 bases. Many of the remaining euchromatic gaps are associated with segmental duplications and will require focused work with new methods. The near-complete sequence, the first for a vertebrate, greatly improves the precision of biological analyses of the human genome including studies of gene number, birth and death. Notably, the human enome seems to encode only 20,000-25,000 protein-coding genes. The genome sequence reported here should serve as a firm foundation for biomedical research in the decades ahead

Comparing Maximum Critical Temperaturesand Lethal Temperatures of Pogonomyrmex californicus and Linepithema humile

Climate change can disturb current ecosystems and impact the survival of certain species. To better understand how climate change will affect particular species, we can measure the maximum critical temperature (CTmax), at which responsiveness ceases, and a lethal temperature (LT) as a proxy to understand the likelihood certain species will survive climate change. We examined Pogonomyrmex californicus, native to the southwestern United States, and the non-native Linepithema humile to compare the survival of native and non-native species in the wake of climate change. We sought to confirm previous literature that has indicated that P. californicus has a higher reported CTmaxthan L. humile. Likewise, we predicted that P. californicus would also have a greater LT than L. humile. We did not find evidence in support of our hypothesis because the average CTmaxfor P. californicus was 48.6 ℃, which was lower than the average CTmaxof 51.5 ℃for L. humile. However, the average LT for P. californicus was 58.0 ℃, while that of L. humile was 54.2 ℃. P. californicus’ higher lethal temperature suggests that P. californicus may be more tolerant of climate change

Competitive Readiness: Developmental Considerations to Promote Positive Youth Development in Competitive Activities

Competitive experiences have the potential to empower youth. Understanding the conditions under which young people can grow through competition is necessary to identify how competitive experiences can optimally support youth as engaged participants and people. This paper serves as a novel integration of previous research aimed toward practitioners. The purpose of this paper is to provide adult (and youth) leaders with empirically-based, practically meaningful guidance to integrate practices that support competitive readiness for youth development. To clarify the youth competitive readiness debate, this paper adopts a process-oriented, developmental perspective. We first define and provide background on youth development. Second, we put forth guiding postulates and their application to practice for organized competitive experiences for positive youth development promotion. We argue that youth are “ready” to compete not just when they can survive competitive experiences, but thrive through them. Interactions between individual, contextual, and developmental factors over time influence fluctuations in a young person’s state of competitive readiness. In this way, competitive readiness is an ongoing process that encompasses the individual needs of the child in relation to the environment

Impact of a Modified Version of Baby-Led Weaning on Dietary Variety and Food Preferences in Infants

The aim of this study was to determine whether food variety and perceived food preferences differ in infants following baby-led instead of traditional spoon-feeding approaches to introducing solids. A total of 206 women (41.3% primiparous) were recruited in late pregnancy from a single maternity hospital (response rate 23.4%) and randomized to Control (n = 101) or BLISS (n = 105) groups. All participants received government-funded Well Child care. BLISS participants also received support to exclusively breastfeed to 6 months and three educational sessions on BLISS (Baby-Led Weaning, modified to reduce the risk of iron deficiency, growth faltering, and choking) at 5.5, 7, and 9 months. Food variety was calculated from three-day weighed diet records at 7, 12, and 24 months. Questionnaires assessed infant preference for different tastes and textures at 12 months, and for ‘vegetables’, ‘fruit’, ‘meat and fish’, or ‘desserts’ at 24 months. At 24 months, 50.5% of participants provided diet record data, and 78.2% provided food preference data. BLISS participants had greater variety in ‘core’ (difference in counts over three days, 95% CI: 1.3, 0.4 to 2.2), ‘non-core’ (0.6, 0.2 to 0.9), and ‘meat and other protein’ (1.3, 0.8 to 1.9) foods at 7 months, and in ‘fruit and vegetable’ foods at 24 months (2, 0.4 to 3.6). The only differences in perceived food preferences observed were very small (i.e., <5% difference in score, at 12 months only). Infants following the modified Baby-Led Weaning were exposed to more varied and textured foods from an early age, but only an increased variety in ‘fruit and vegetable’ intake was apparent by two years of age

Impact of a Modified Version of Baby-Led Weaning on Infant Food and Nutrient Intakes: The BLISS Randomized Controlled Trial

© 2018 by the authors. Licensee MDPI, Basel, Switzerland. Despite growing international interest in Baby-Led Weaning (BLW),we know almost nothing about food and nutrient intake in infants following baby-led approaches to infant feeding. The aim of this paper was to determine the impact of modified BLW (i.e., Baby-Led Introduction to SolidS; BLISS) on food and nutrient intake at 7–24 months of age. Two hundred and six women recruited in late pregnancy were randomized to Control (n = 101) or BLISS (n = 105) groups. All participants received standard well-child care. BLISS participants also received lactation consultant support to six months, and educational sessions about BLISS (5.5, 7, and 9 months). Three-day weighed diet records were collected for the infants (7, 12, and 24 months). Compared to the Control group, BLISS infants consumed more sodium (percent difference, 95% CI: 35%, 19% to 54%) and fat (6%, 1% to 11%) at 7 months, and less saturated fat (−7%, −14% to −0.4%) at 12 months. No differences were apparent at 24 months of age but the majority of infants from both groups had excessive intakes of sodium (68% of children) and added sugars (75% of children). Overall, BLISS appears to result in a diet that is as nutritionally adequate as traditional spoon-feeding, and may address some concerns about the nutritional adequacy of unmodified BLW. However, BLISS and Control infants both had high intakes of sodium and added sugars by 24 months that are concerning

Impact of a Modified Version of Baby-Led Weaning on Infant Food and Nutrient Intakes: The BLISS Randomized Controlled Trial

Despite growing international interest in Baby-Led Weaning (BLW), we know almost nothing about food and nutrient intake in infants following baby-led approaches to infant feeding. The aim of this paper was to determine the impact of modified BLW (i.e., Baby-Led Introduction to SolidS; BLISS) on food and nutrient intake at 7–24 months of age. Two hundred and six women recruited in late pregnancy were randomized to Control (n = 101) or BLISS (n = 105) groups. All participants received standard well-child care. BLISS participants also received lactation consultant support to six months, and educational sessions about BLISS (5.5, 7, and 9 months). Three-day weighed diet records were collected for the infants (7, 12, and 24 months). Compared to the Control group, BLISS infants consumed more sodium (percent difference, 95% CI: 35%, 19% to 54%) and fat (6%, 1% to 11%) at 7 months, and less saturated fat (−7%, −14% to −0.4%) at 12 months. No differences were apparent at 24 months of age but the majority of infants from both groups had excessive intakes of sodium (68% of children) and added sugars (75% of children). Overall, BLISS appears to result in a diet that is as nutritionally adequate as traditional spoon-feeding, and may address some concerns about the nutritional adequacy of unmodified BLW. However, BLISS and Control infants both had high intakes of sodium and added sugars by 24 months that are concerning