Cold ions of ionospheric origin observed at the dayside magnetopause and their effects on magnetic reconnection

Thesis (Ph.D.) University of Alaska Fairbanks, 2015Magnetic reconnection at the dayside magnetopause is one of the most important mechanisms that efficiently transfers solar wind particles, momentum, and energy into the magnetosphere. Magnetic reconnection at the magnetopause is usually asymmetric since the plasma and magnetic field properties are quite different in the magnetosphere and the magnetosheath. Cold dense plasma, originating either directly from the ionosphere or from the plasmasphere, has often been observed at the adjacent magnetopause. These cold plasmas may affect reconnection since they modify the plasma properties on the magnetospheric side significantly. This dissertation presents case and statistical studies of the characteristics of the cold ions observed at the dayside magnetopause by using Cluster spacecraft datasets. The plasmaspheric plumes have been distinguished from the ionospheric outows using ion pitch angle distributions. The ionospheric outows feature unidirectional or bidirectional field-aligned pitch angle distributions, whereas the plasmaspheric plumes are characterized by 90° pitch angle distributions. The occurrence rates of the plasmaspheric plumes and ionospheric outows and their dependence on the solar wind/Interplanetary Magnetic Field (IMF) conditions have been investigated. It is found that the occurrence rate of plasmaspheric plume or ionospheric plasma strongly depends on the solar wind/IMF conditions. In particular, plasmaspheric plumes tend to occur during southward IMF while ionospheric outows tends to occur during northward IMF. The occurrence rate of the plasmaspheric plumes is significantly higher on the duskside than that on the dawnside, indicating that the plasmaspheric plumes may lead to a dawn-dusk asymmetry of dayside reconnection. Furthermore, this dissertation investigates the behavior of the cold dense plasma of ionospheric origin during magnetic reconnection at the dayside magnetopause. The motion of cold plasmaspheric ions entering the reconnection region differs from that of warmer magnetosheath and magnetospheric ions. In contrast to the warmer ions, which are probably accelerated by reconnection near the subsolar magnetopause, the colder ions are simply entrained by E x B drift at high latitudes on the recently reconnected magnetic field lines. This indicates that plasmaspheric ions can sometimes play a very limited role in magnetic reconnection process. Finally, this dissertation examines a controlling factor that leads to the asymmetric reconnection geometry at the magnetopause. It is demonstrated that the separatrix and ow boundary angles are greater on the magnetosheath side than on the magnetospheric side of the magnetopause, probably due to the stronger density asymmetry rather than magnetic field asymmetry at this boundary

Argument Composition and Linearization: Korean Complex Predicates and Scrambling

This paper deals with the formation of complex predicates and some interesting scrambling facts in Korean. First, we extend the notion of complex predicates to include various noun-verb combinations by providing syntactic and semantic evidence. Within the HPSG framework, we then propose a general schema based on argument composition, which can be used for different types of complex predicates. Furthermore, in opposition to Chung (1998)’s approach using argument composition for scrambling phenomena, we argue that linearization constraint is better to account for various permutation possibilities in Korean

Establishment, Present Condition, and Developmental Direction of the New Korean Healthcare Accreditation System

On July 23rd, 2010 a revised medical law (Article 58) was passed to change existing evaluation system of medical institutions to an accreditation system. The new healthcare accreditation system was introduced to encourage medical institutions to work voluntarily and continuously to improve patient safety and medical service quality. Changes regarding the healthcare accreditation system included the establishment of an accreditation agency, the voluntary participation of medical institutions, accreditation standards centering on the treatment process and patient safety, tracing methodology, and the announcement of comprehensive results concerning accreditation. Despite varying views on the healthcare accreditation system, including some that are critical, it is meaningful that the voluntary nature of the system acknowledges that the medical institutions must be active agents in improving medical service quality. Healthcare quality is not improved instantaneously, but instead gradually through continuous communication within the clinical field. For this accreditation system to be successful, followings are essential: the accreditation agency becomes financially independent and is managed efficiently, the autonomy and regulation surrounding the system are balanced, the professionalism of the system is ensured, and the medical field plays an active role in the operation of the system

Prevalence of Plasmid-Mediated Quinolone Resistance Genes among Ciprofloxacin-Nonsusceptible Escherichia coli

OBJECTIVES:To analyze the prevalence of plasmid-mediated quinolone resistance (PMQR) determinants in ciprofloxacin-nonsusceptible Escherichia coli and Klebsiella pneumoniae isolated from patients at a tertiary care hospital in Korea

The Impact of Prenatal Massage Experience Upon The Mother’s Delivery Confidence And Stress/ Anxiety

This study examined the differences in delivery confidence and levels of stress/anxiety among pregnant women based on their experiences with prenatal massage. For this research, the researcher randomly sampled and selected 629 expecting mothers, who were members of an online community for expecting mothers, between August 15 and August 30, 2022, and collected survey data, which was analyzed using the SPSS 25.0 statistical package program. The results of this study are as follows: First, examining the differences in delivery confidence according to prenatal massage experience, it was found that prenatal massage experience has a significant impact on delivery confidence. Mothers with more experience had higher confidence in delivery. Second, prenatal massage experience was found to have a significant effect on the levels of stress and anxiety, with mothers lacking prenatal massage experience showing higher levels of stress and anxiety. The results of this study suggest that professional and systematic education on prenatal massage is necessary to contribute to the development of programs for pregnant women that can increase consumer satisfaction as part of the general prenatal program

A multilevel analysis of social capital and self-reported health: evidence from Seoul, South Korea

<p>Abstract</p> <p>Background</p> <p>This study aims to resolve two limitations of previous studies. First, as only a few studies examining social capital have been conducted in non-western countries, it is inconclusive that the concept, which has been developed in Western societies, applies similarly to an Asian context. Second, this study considers social capital at the individual-level, area-level and cross-levels of interaction and examines its associations with health while simultaneously controlling for various confounders at both the individual-level and area-level, whereas previous studies only considered one of the two levels. The purpose of this study is therefore to examine the associations between social capital and health by using multilevel analysis after controlling for various confounders both at the individual and area-levels (i.e., concentrated disadvantage) in non-western countries.</p> <p>Methods</p> <p>We conducted a cross-sectional survey from December 2010 to April 2011 in Seoul, South Korea. The target population included respondents aged 25 years and older who have resided in the same administrative area since 2008. The final sample for this study consisted of 4,730 respondents within all 25 of Seoul's administrative areas.</p> <p>Results</p> <p>In our final model, individual-level social capital, including network sources (OR = 1.23; 95% CI = 1.11-1.37) and organizational participation (OR = 2.55; 95% CI = 2.11-3.08) was positively associated with good/very good health. Interestingly, the individual × area organizational participation cross-level interaction was negatively associated with good/very good health (OR = 0.40; 95% CI = 0.32-0.50), indicating that in areas with higher organizational participation, individuals with high organizational participation were less likely to report good/very good health when compared to low organizational participation individuals.</p> <p>Conclusion</p> <p>Our study provides evidence that individual-level social capital is associated with self-reported health, even after controlling for both individual and area-level confounders. Although this study did not find significant relationships between area-level organizational participation and self-reported health, this study found the cross-level interaction for social capital. Hence, in areas with lower organizational participation, the probability of reporting good/very good health is higher for individuals with high organizational participation than individuals with low organizational participation. This study, albeit tentatively, suggests that policy makers should focus upon social capital when making policies which aim to enhance one's health.</p

Love, Marriage, and Irony in Barbara Pym's Novels

In my study on Barbara Pym's novels, the focus is first on the two basic ironies in love-marriage relations: irony of dilemma in which marriage is seen as the end of romantic love; and irony of situation in which excellent but plain-looking women are deprived of the chance to express their basic need for love. Chapter I of this study introduces the major themes and ironies in Pym's novels and the nature and functions of her irony. The following six chapters examine the two major ironies in six of Pym's twelve novels: Some Tame Gazelle, Excellent Women, Jane and Prudence, Less Than Angels, A Glass of Blessings, and A Few Green Leaves. While discussing the uniqueness of each of Pym's heroines, I also explore how Pym underwent changes in her views of love and marriage and how she attempted to keep a balance between her romanticism and her sense of irony. Pym's other six novels are discussed in Chapter VIII, the concluding chapter