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Physics of Solar Flares

  • Magara, Tetsuya
    • The Bulletin of The Korean Astronomical Society
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    • v.35 no.1
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    • pp.26.1-26.1
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    • 2010
  • In this talk we outline the current understanding of solar flares, mainly focusing on magnetohydrodynamic (MHD) processes. A flare causes plasma heating, mass ejection, and particle acceleration which generates high-energy particles. The key physical processes producing a flare are: the emergence of magnetic field from the solar interior to the solar atmosphere (flux emergence), formation of current-concentrated areas (current sheets) in the corona, and magnetic reconnection proceeding in a current sheet to cause shock heating, mass ejection, and particle acceleration. A flare starts with the dissipation of electric currents in the corona, followed by various dynamic processes that affect lower atmosphere such as the chromosphere and photosphere. In order to understand the physical mechanism for producing a flare, theoretical modeling has been develops, where numerical simulation is a strong tool in that it can reproduce the time-dependent, nonlinear evolution of a flare. In this talk we review various models of a flare proposed so far, explaining key features of individual models. We introduce the general properties of flares by referring observational results, then discuss the processes of energy build-up, release, and transport, all of which are responsible for a flare. We will come to a concluding viewpoint that flares are the manifestation of the recovering and ejecting processes of a global magnetic flux tube in the solar atmosphere, which has been disrupted via interaction with convective plasma while rising through the convection zone.

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Study on drawing up the integration method between combined information communication network design and information management system for Transportation-Power-Infrastructures on the electric vehicle (전기자동차 교통-전력-시설 통합 정보통신 네트워크 설계 및 정보관리시스템 간 연계 방안 수립에 관한 연구)

  • Choi, Yoon-Gun;Hwang, Tae-Hong;Kim, Geon-Gook
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.10 no.5
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    • pp.60-70
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    • 2011
  • Vehicle location detection and wireless communication method have be designed along the same lines as GPS, CDMA and WLAN, which is based upon the selecting factors such as state-of-art technology trend, accuracy, stability, and economic feasibility, in order to select the optimum method of information communication networks for integrated "Transportation-Power-Facilities" on the electric bus. In addition, the key features of each alternative for an efficient linkage have been review and the integration methodology for linking among Transportation Charging Center, Transportation(ITS, BIS) Center and smart Grid Center has been drawn up based on a technical level of difficulty of each alternative, political and administrative difficulties, and expense justification.

A Study on the Design Characteristics of Guest Room in the Boutique Hotel - Focused on Domestic and Foreign Boutique Hotel from Year 2010 until Current - (부티크 호텔의 객실 디자인 특성에 관한 연구 - 2010년 이후 국내외 부티크 호텔 사례 분석을 중심으로 -)

  • Xiao, Qi;Hong, Kwan-Seon
    • Korean Institute of Interior Design Journal
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    • v.25 no.4
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    • pp.13-22
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    • 2016
  • With the change of the times, the hotel industry of modern city also becomes diversified. Especially the appearance of boutique hotels gives customers a new understanding of hotels. Boutique hotels are different from ordinary hotels which only provide accommodation. It provides customers with different experiences and innovation space of life style. Therefore, the appearance of boutique hotels could be considered as the mature performance of hotel industry. Therefore, the purpose of this research is to discuss the design features of guest rooms of boutique hotels. The methodologies of this research are to investigate the concept and characteristics of boutique hotels, to grasp the direction of the guest room design and to come to the conclusion using the method of case study. The scope of this research is based on the hotel design characteristics mentioned in preliminary studies of Korea and China (after 2010). The guest room design characteristics of boutique hotels are classified. The scope of the selected examples is the 20 boutique hotels opened in recent 5 years (newly opened or re-opened) since 2010, in which there are 2 Korean cases and 18 foreign cases. Chapter 4 classifies the guest room design characteristics of boutique hotels into four characteristics of hybrid, experiential, regional and environmental by literature review.

Clinicopathologic Characteristics of Breast Cancer in Jamaica

  • Chin, Sheray Nicole;Green, Cheryl;Strachan, Georgiana Gordon;Wharfe, Gilian
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.7
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    • pp.3319-3322
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    • 2014
  • Breast cancer is the most common cancer in Jamaican women. This study assessed the clinicopathologic features of cases in a hospital-based specialist clinic in Kingston, Jamaica. A retrospective chart review was performed for the 2-year study period and relevant clinical and surgico-pathologic data were recorded and analyzed. Median age of the 121 breast cancer patients was 52 years (range 22-84, IQR 20) and there was 1 case of male breast cancer. Most patients (65%) were referred from the surgical service after definitive breast cancer surgery, 20% were referred for pre-operative systemic therapy, and 15% had a diagnosis of metastatic disease. The surgico-pathologic group comprised 78 women who were referred for adjuvant therapy. The majority had presented with a palpable breast lump (91%), with median tumour size 3.5cm (range 0.4-13, IQR 4). Most tumours were node positive (56%). Approximately one-third of patients had stage III disease (33%). Most women presented with large palpable tumours and had lymph node involvement confirmed on surgicopathological evaluation, indicative of limited early breast cancer detection. A national screening mammography programme is recommended for detection of earlier lesions. Pre-operative systemic therapy should be considered as an option for eligible patients.

General Perception about the Life of Institutionalized Elderly (시설노인의 삶에 대한 일반인의 인식)

  • Kim, Myung-Ae;Kim, Hye-Jin;Kim, Young-Suk
    • Korean Journal of Adult Nursing
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    • v.17 no.3
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    • pp.389-399
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    • 2005
  • Purpose: This study aims to explore general perception types about the life of institutionalized elderly and thus to provide the basic data for nursing intervention for them. Method: This study used a Q methodology. A Q sample was developed through a review of related literature and descriptions of ordinary people about the life of institutionalized elderly. Thirty-eight statements made up the finalized Q sample. Results: The results revealed three different types of the general people's perception about the life of institutionalized elderly. Type 1 is an optimistic group which expects modernized institutions. This group focuses on social relationships enjoying a variety of cultural life. Type 2 is a positive group which pursues independence. They are open-minded about the use of the institution and are not ashamed of the life in the institution. Type 3 is a conservative group which disapproves institutionalization. The members of this group strongly disapprove the institution itself and have negative views on institutionalization. These three types share certain common features while having distinctive characteristics showing individual views and traits about the life of the institutionalized elderly. Conclusion: This study will provide us the basic data to understand institutionalized elderly and to develop nursing intervention for them.

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Clinical Features of Oxaliplatin Induced Hypersensitivity Reactions and Therapeutic Approaches

  • Bano, Nusrat;Najam, Rahila;Qazi, Faaiza;Mateen, Ahmed
    • Asian Pacific Journal of Cancer Prevention
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    • v.17 no.4
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    • pp.1637-1641
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    • 2016
  • Oxaliplatin, a third generation novel platinum compound is the most effective first line chemotherapeutic agent for colorectal cancer (CRC) in combination with 5FU and leucovorin. It is indicated for pancreatic, gastric and testicular cancers combined with bevacuzimab, capecitabine, irinotecan and other cytotoxic agents. However, moderate to severe hypersensitivity reactions (HSR) during or after oxaliplatin infusion usually require cessation of chemotherapy or substitution of the key therapeutic drug which largely interferes with improved patient prognosis. This mini- review showcases recent and accepted opinions/approaches in oxaliplatin induced HSR management. Physicians and oncologists have varying attitudes regarding the decision to rechallenge the patient after an HSR experience, efficacy of desensitization protocols, effectiveness and selection of drugs for premedication and possibilities of cross sensitivity to other platinum agents (e.g. carboplatin). A brief insight into underlying molecular mechanisms and clinical manifestations of oxaliplatin induced HSR is offered. We have also discussed the management of oxaliplatin induced HSR and risk stratification for a successful and complete chemotherapeutic plan.

Diagnosis of Helicobacter pylori Infection

  • Tongtawee, Taweesak;Kaewpitoon, Soraya;Kaewpitoon, Natthawut;Dechsukhum, Chavaboon;Leeanansaksiri, Wilairat;Loyd, Ryan A;Matrakool, Likit;Panpimanmas, Sukij
    • Asian Pacific Journal of Cancer Prevention
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    • v.17 no.4
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    • pp.1631-1635
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    • 2016
  • Helicobacter pylori infection plays an important role in the pathogenesis of chronic gastritis, peptic ulcer disease and gastric malignancy. A diagnosis of infection is thus an important part of a treatment strategy of many gastrointestinal tract diseases. Many diagnostic tests are available but all have some limitations in different clinical situations and laboratory settings. A single gold standard cannot available, but be used for diagnosis of Helicobacter pylori infection in daily clinical practice in all areas, so several techniques have been developed to give reliable results, especially focusing on real time endoscopic features. The narrow band imaging system (NBI) and high resolution endoscopy are imaging techniques for enhanced visualization of infected mucosa and premalignant gastric lesions. The aim of this article is to review the current diagnostic options and possible future developments detection of Helicobacter pylori infection.

N-Nitrosodimethylamine in the Kashmiri Diet and Possible Roles in the High Incidence of Gastrointestinal Cancers

  • Chikan, Naveed A.;Shabir, Nadeem;Shaffi, Sheikh;Mir, Manzoor R.;Patel, Trupti N.
    • Asian Pacific Journal of Cancer Prevention
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    • v.13 no.3
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    • pp.1077-1079
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    • 2012
  • The Kashmiri population is culturally distinct with special dietary features owing to the temperate climatic conditions of Kashmir valley. This has habituated the population to preserve food in smoked, pickled and sundried forms which include considerable amounts of $N$-nitroso compounds (NOCs). These are known to cause cytotoxicity, DNA damage, mutation, unscheduled DNA synthesis and DNA methylation. All of these changes at molecular level are known to contribute to the pathogenesis of cancer. One of the prominent NOCs found in Kashmiri food is $N$-Nitrosodimethylamine (NDMA). Here we review the occurrence of NDMA in sundried foods, dried fish, kehwa, traditional pickle, $Brassica$ $oleracia$ and $tobbaco$. We also discuss its possible role in the high prevalence of gastrointestinal cancers in Kashmir.

Time and Newsweek's Coverage of the Arab Uprisings in 2011: A Content Analysis Survey

  • Abushouk, Ahmed Ibrahim
    • Asian review of World Histories
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    • v.2 no.1
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    • pp.81-104
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    • 2014
  • The popular uprisings that took place in the Arab world, and led to the overthrow of four heads of states, namely Zine El-Abidine Ben Ali (January 14, 2011) of Tunisia, Hosni Mubarak (February 11, 2011) of Egypt, Muammar al-Gaddafi (August 23, 2011) of Libya and Ali Abdullah Saleh (November 23, 2011) of Yemen, have attracted the attention of the world media and policy makers in the West and the Middle East, and triggered their concern for the political future of the region. This article does not offer a comprehensive assessment of these uprisings, but rather analyzes the coverage of Time and Newsweek of the underlying causes of the uprisings and their anticipated consequences. It also investigates how the two magazines have highlighted the scenarios that may pose a real challenge to Arab regimes supported by the American administration, and internationally reshape the priorities of American foreign policy in the region. These issues are examined from the two magazines' perspectives, which under line the features of U.S. foreign policy in the region, where the White House is more concerned about the security of the state of Israel, control of the Arab oil and suppression of "Muslim fundamentalism."

Skeletal Manifestations of Mucolipidosis II/III

  • Cho, Sung Yoon
    • Journal of mucopolysaccharidosis and rare diseases
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    • v.2 no.1
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    • pp.8-12
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    • 2016
  • Mucolipidosis (ML) is a kind of skeletal dysplasia. Characteristic X-ray findings of the bone may contribute to the early diagnosis and treatment of ML II/III. Skeletal radiographs show distinctive patterns at different ages: neonatal hyperparathyroidism, osteodystrophy (similar to chronic osteitis fibrosa cystica), and dysostosis multiplex. Patients with ML II/III show a mixture of osteodystrophic bone changes and atypical changes of dysostosis multiplex: proximal pointing of the metacarpals in the wrist, dysplastic changes in the lower third of the ilia, marked broadening of the ribs becoming oar-shaped, and beaking of the lower thoracic and lumbar vertebrae. In ML II, the osteodystrophy has clinical and radiographic features of neonatal hyperparathyroidism. In some neonatal subjects, chemical hyperparathyroidism is also demonstrated. After transient hyperparathyroidism in newborns, the progressive osteitis fibrosa cystica develops from 3-6 months of age. Patients with ML III show prominent skeletal involvement, particularly the destruction of vertebral bodies and the femoral heads. Intravenous pamidronate treatment is well tolerated, and it can produce clinical effects, with a reduction in bone pain and improvements in mobility in patients with ML III. In this review, the skeletal manifestations of ML II and III are investigated.