Influence of Filament Diameter on Superconducting Properties of MgB2 Multi-core Wires

M. Reissner,L. Bulla,I. Husek,T. Meliˇsek,P. Kov´aˇc 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12

Magnetic behaviour of a series of MgB2 wires, in each case with 19 filaments of superconductor,surrounded by Ti as barrier and reinforced by stainless steel, prepared in the same way but mechanicallydeformed to different filament diameters Φ between 58.5 and 17.7 µm, was investigated. Whereas no influence of Φ on superconducting transition temperature is found, the width of thetransition increases with Φ. Critical current density, irreversibility line and mean effective activationenergy U decrease systematically with decreasing Φ. From a comparison of the field dependence ofthe pinning force and the temperature dependence of U, it is concluded, that pinning is dominatedat low fields by grain boundary pinning and at higher fields by point defect pinning, with a ratherbroad distribution of pinning energies.

Elsewhere in East Asia : Revisioning Human Security In Southeast Asia

( Mely Caballero Anthony ) 경남대학교 극동문제연구소 2004 ASIAN PERSPECTIVE Vol.28 No.3

Tribological properties and studies in SBF of Ta2O5/TiN/TiO2 monolayer and bilayer coatings on biomedical Ti6Al4V alloy

Melis Yurddaskal,Hülya Durmuş 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.5

In this study, Ta 2 O 5 , TiN, and TiO 2 are coated with magnetron sputtering method as monolayer and bilayer on Ti6Al4V alloy used in biomedical applications. The deposited coatings are characterized, and their mechanical properties are determined by nanoindentation tests. As a result of the pin-on disc wear test performed in dry environment and room temperature, in vitro corrosion test was applied to the samples with high wear resistance, and the information about the tribological properties was obtained. Experimental results show that the existence of the intermediate layer has also significant effect on the corrosion resistance of the coatings. The biocompatibility of the Ta 2 O 5 /TiO 2 coating was examined by keeping it in simulated body fluid (SBF) due to its noticeable wear and corrosion resistance properties, the growth of apatite, which is described as an indicator of biocompatibility, occurred on the sample surface after 7 day.

Revisioning Human Security in Southeast Asia

Mely Caballero-Anthony 경남대학교 극동문제연구소 2004 ASIAN PERSPECTIVE Vol.28 No.3

The article aims to capture the dynamics of contesting security in Southeast Asia and examines how states and non-state actors have responded to the changing nature of the security environment. The argument here is that in spite of structural constraints and problems with conceptual clarity, human security is finding a place in the regional security discourses. Though found along the margins of subaltern security discourses, human security is the concept that embodies the security concerns of societies; its argument is from the standpoint of the most vulnerable, who can articulate their security in their own terms, without being excluded and alienated. Civil-society organizations have been pivotal in framing human security through their transnational linkages and work in human rights and development.

Examining Southeast Asia’s Diplomacy on Nuclear Disarmament and Nuclear Security: Shared Norms and a Regional Agenda

Mely Caballero-Anthony,Julius Cesar Trajano 서울대학교 통일평화연구원 2022 Asian Journal of Peacebuilding Vol.10 No.2

Member-states of the Association of Southeast Asian Nations (ASEAN) supportthe norms of nuclear disarmament and nuclear security through diplomatic effortsat the global level and regional efforts to promote nuclear safety and security. This is demonstrated in how ASEAN helped push for negotiation of the Treaty onthe Prohibition of Nuclear Weapons (TPNW) and its eventual passage, as well asongoing efforts to promote regional cooperation in advancing nuclear security andnuclear safety. Regional frameworks and mechanisms like the ASEAN Networkof Regulatory Bodies on Atomic Energy (ASEANTOM), the ASEAN RegionalForum, and the East Asia Summit provide the platforms for ASEAN to advance itsdiplomacy in promoting the norms of nuclear governance.

The State of Nuclear Energy in ASEAN: Regional Norms and Challenges

( Mely Caballero Anthony ),( Julius Cesar I. Trajano ) 경남대학교 극동문제연구소 2015 ASIAN PERSPECTIVE Vol.39 No.4

The Fukushima nuclear disaster in 2011 did not dampen plans by Southeast Asian countries to develop nuclear power plants, despite safety concerns. The strong interest in nuclear power development is being driven by strategic considerations as states view nuclear power as an alternative energy source that can help address the dual objectives of energy security and mitigation of climate change effects. Our article examines the prospects for the Association of Southeast Asian Nations (ASEAN) to build a stronger regional normative framework to promote nuclear safety and security and prevent proliferation of nuclear weapons. In light of ASEAN``s vision to establish a political and security community in 2015, we argue that member states that plan to use nuclear energy need to address critical issues such as legislative and regulatory frameworks, human resource development, radioactive waste management, nuclear safety, emergency planning, and security and physical protection.

Association of Adipokines, Insulin Resistance, Hypertension and Dyslipidemia in Patients with Psoriasis Vulgaris

( Melis Coban ),( Levent Tasli ),( Sebahat Turgut ),( Seyma Ozkan ),( Melek Tunc Ata1 ),( Fulya Akın ) 대한피부과학회 2016 Annals of Dermatology Vol.28 No.1

Background: Systemic inflammation in psoriasis causes insulin resistance and cardiovascular diseases. Adipokines are adipose-tissue-derived factors that are involved in metabolic processes. It is thought that these adipokines are associated with the development of psoriasis. Objective: The purpose of this study was to determine the changes in adipokine levels, insulin resistance, hypertension, and dyslipidemia over a 12-week period. Methods: The study comprised 35 psoriasis patients and 50 controls. Blood samples were obtained twice from the patients, one sample at the start and one at the end of a 12-week follow-up period. The following parameters were assessed in both groups: serum fasting glucose, fasting insulin, homeostasis model assessment-estimated insulin resistance (HOMA-IR) index, serum lipids, adiponectin, leptin, resistin, chemerin, omentin, vaspin, visfatin, retinol-binding protein 4, and high-sensitivity C-reactive protein (hs-CRP) levels; blood pressure; body mass index; and the psoriasis area severity index (PASI) scores. Results: The patients showed an improvement in the PASI score and a significant decrease in serum hs-CRP, omentin, and chemerin values. Moreover, at the start of the follow-up, the psoriasis patients had significantly lower levels of adiponectin and visfatin and significantly higher levels of vaspin and resistin than those of the control group. Visfatin levels correlated negatively with low-density lipoprotein (LDL) and cholesterol, while vaspin and omentin levels correlated positively with diastolic blood pressure. Decreased adiponectin levels correlated negatively with diastolic blood pressure and LDL. Conclusion: Plasma levels of adipokines might be useful for evaluating the disease activity of psoriasis and its comorbidities.

Differences in Pain Characteristics and Functional Associations between Nursing Home Residents and Community-Dwelling Older Adults: A Cross-Sectional Study

Melis Tansuğ,Turhan Kahraman,Arzu Genç 대한노인병학회 2021 Annals of geriatric medicine and research Vol.25 No.3

Background: Pain is one of the most critical issues in older adults, and the place of residence may play an important role in pain characteristics and related factors. However, it is an understudied subject. This study investigated differences in pain characteristics and functional associations between nursing home residents and community-dwelling older adults. Methods: Older adult participants were recruited from nursing homes (n=73) and the community (n=73). Pain characteristics, including type, intensity, and number of pain sites, were evaluated. Other outcome measures were functional mobility, walking speed, functional independence, physical activity, anxiety, depression, and health-related quality of life. Results: Nursing home residents experienced musculoskeletal pain more frequently and had a greater number of pain sites than community-dwelling older adults (p<0.05). Walking speed and mobility were significantly lower and anxiety and depression were significantly higher in nursing home residents (p<0.05). While higher pain intensity was significantly correlated with low scores on physical measures, low health-related quality of life, and higher depression and anxiety symptoms in both groups (p<0.05), the magnitudes of the correlations were much higher in nursing home residents. The number of pain sites was significantly correlated with low scores on physical measures, low health-related quality of life, and higher depression and anxiety symptoms mainly in nursing home residents (p<0.05). Conclusion: Compared to community-dwelling older adults, nursing home residents experienced musculoskeletal pain more frequently and at more sites in the body. Higher pain intensity and number of pain sites were associated with worse clinical variables, mainly in nursing home residents. This study highlights the importance of regular pain assessment, especially in nursing home care settings.

Peace and Security Studies in Southeast Asia in a Changing Global Environment

( Mely Caballero-anthony ) 서울대학교 통일평화연구원 2023 Asian Journal of Peacebuilding Vol.11 No.1

Peace and security studies in Southeast Asia show a rich array of theoretical and policy-oriented research that highlights key themes in the prevention and management of conflicts. These themes also highlight salient concepts that define approaches to peace and security. Two themes are noteworthy. First, while peace and security are not mutually exclusive, security cannot be assured by focusing on negative peace alone but also by a purposeful pursuit of positive peace, hence comprehensive security is critical. The second theme is the importance of regional institutions like ASEAN in managing intra-state relations. Given the fluid state of the global security environment, there is now greater scope for new thinking on how approaches to peace and security can be made more responsive to achieve shared goals.

The effect of curvature on the impact response of foam-based sandwich composite panels

Melis Yurddaskal,Buket Okutan Baba 국제구조공학회 2016 Steel and Composite Structures, An International J Vol.20 No.5

The aim of this study is to investigate the impact behavior and impact-induced damage of sandwich composites made of E-glass/epoxy face sheets and PVC foam. The studies were carried out on square flat and curved sandwich panels with two different radius of curvatures. Impact tests were performed under impact energies of 10 J, 25 J and 80 J using an instrumented drop-weight machine. Contact force and displacement versus time and contact force- displacement graphs of sandwich panels were presented to determine the panel response. Through these graphs, the energy absorbing capacity of the sandwich panels was determined. The impact responses and failure modes of flat and curved sandwich panels were compared and the effect of curvature on sandwich composite panel was demonstrated. Testing has shown that the maximum contact force decrease while displacement increases with increasing of panel curvature and curved panels exhibits mixed failure mode, with cylindrical and cone cracking.