• Title/Summary/Keyword: Yeungnam University

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Langerhans Cell Histiocytosis with Central Diabetes Insipidus : A Case Report (중추성 요붕증이 동반된 랑게르한스 세포 조직구증 1예)

  • Kim, Jin-Ho;Moon, Jun-Sung;Mun, Sun-Jung;Lee, Ji-Eun;Choi, Jae-Won;Eun, Mi-Jung;Chun, Kyung-A;Cho, Ihn-Ho;Yoon, Ji-Sung;Won, Kyu-Chang;Lee, Kyung-Hee;Shin, Duk-Seop;Lee, Hyoung-Woo
    • Journal of Yeungnam Medical Science
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    • v.22 no.2
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    • pp.259-265
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    • 2005

  • Central diabetes insipidus (DI) is a syndrome characterized by thirst, polydipsia and polyuria. Langerhans cell histiocytosis is one of the etiologies of DI. Recently we experienced a central DI associated with Langerhans cell histiocytosis. The 44 years old female patient complained right hip pain, polydipsia and polyuria. We carried out water deprivation test. After vasopressin injection, urine osmotic pressure was increased from 109 mOsmol/kg to 327 mOsmol/kg (300%). Brain MRI showed a thickened pituitary stalk and air bubble like lesions sized with 5cm, 7cm was shown on fifth L-spine and right hip bone at hip bone CT. CT guided biopsy revealed abnormal histiocytes proliferation and abundant lymphocytes. The final diagnosis was central DI associated with systemic Langerhans cell histiocytosis invading hip bone, L-spine and pituitary stalk. Desmopressin and etoposide chemotherapy were performed to the patient.

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Enhancement of Power Generation in Hybrid Magneto-Mechano-Electric Generator with Triboelectric Effect (마찰전기 효과가 접목된 하이브리드 자기-기계-전기 발전 소자의 출력 특성 향상연구)

  • Baek, Chang Min;Kim, Min Woo;Lee, Ji Won;Kim, Hyun Ah;Jung, Ji Yun;Yoon, Jun Hyeon;Kim, Hyo Il;Park, Ye Jin;Kim, Gi Hun;Kim, So Hwa;Kim, Seung Heon;Kim, Jeong Min;Lee, Hye Seon;Jang, Jeong Won;Jeong, Min Gyo;Choi, Jin Hyeok;Ha, Seung Yun;Lee, Seungah;Choi, Han Seung;Ryu, Jungho
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.35 no.6
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    • pp.639-646
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    • 2022

  • Energy harvesting technologies that can convert wasted various energy into usable electrical energy have been widely investigated to overcome the limitation of batteries for the powering of IoT sensors and small electronic devices. Hybrid energy harvesting is known as a technology that enhances the output power of single energy harvesting device by housing two or more various energy harvesting mechanisms. In this study, we introduce a hybrid MME (Magneto-Mechano-Electric) generator coupled with the triboelectric effect. Through FEA modeling, four triboelectric materials, including PI (Polyimide), PFA(Teflon), Cu, and Al, were selected and compared with the expected triboelectric potentials. The effect of surface morphology was investigated as well. Among various combination of triboelectric materials and surface morphologies, PFA-Al combination with the surface morphology having nano-scale square projections showed highest output potential under triboelectrification. It is also experimentally confirmed that output voltage and power of the hybrid MME generator with triboelectric material combinations.

  • https://doi.org/10.4313/JKEM.2022.35.6.15 인용 PDF KSCI