6 research outputs found
μ΄κ³ μ§κ³΅ ννκΈ°μμ¦μ°©λ²μ μ΄μ©ν Siμ SiGe λ¨κ²°μ λ§μ μ νμ μ±μ₯
Thesis (doctoral)--μμΈλνκ΅ λνμ :μ¬λ£κ³΅νλΆ,2003.Docto
A Study on the Development of an Electronic Voltage Transformer embedded in a Spacer of Gas Insulated Switchgears
λ³μ μμ κ°μ€μ μ°κ°νμ₯μΉ(GIS)μλ μ μ μΈ‘μ μ μν΄ λ³λμ ν±ν¬ λ΄μ λνμ μ² μ¬ν κ³κΈ°μ© λ³μκΈ°λ₯Ό μ€μΉνκ³ μλ€. λ³Έ λ
Όλ¬Έμμλ GISμ μννμ μΉνκ²½ν, μ±λ₯ ν₯μμ μν΄ μ€νμ΄μ λ΄μ₯ν μ μμ λ³μκΈ°(EVT)μ λν μ°κ΅¬λ₯Ό μννμλ€. μ μμ λ³μκΈ°λ μ€νμ΄μμ λ΄μ₯μ μ©λμ± λΆμμΌμ(CVD)μ κ³ μ
λ ₯-μ μΆλ ₯ μνΌλμ€μ μ μ ν΄λ‘μ΄λ‘ ꡬμ±νμλ€. μ©λμ± λΆμμΌμλ μ μ° μ±λ₯μ ν보νκ³ , μ΄μ μ€ μ§λκ³Ό 좩격μ 견λλΌ μ μλλ‘ Flexible PCBννλ‘ μ μνμλ€. μμ μ μ μμ λ³μκΈ°μ λΆμλΉλ 42,270μ΄λ©°, β3dBμ μ£Όνμ λμμ 0.33Hz ~ 3.9MHzμ΄λ€. μ 격 μ μ 170kVμ 6%, 12% λ° 18%μμ λΆμλΉ μ€μ°¨λ 0.32%, μμμ°¨λ 12.9[min]μ΄μλ€. μ΄λ IEC 60044-7μ κ·μ λ 0.5κΈμ μ νλ μ΄λ΄μ΄λ©°, μ 격 μ μμ 80% ~ 120%μμλ λ§μ‘±νλ€. λ³Έ EVTλ‘ κΈ°μ‘΄ μ² μ¬ν κ³κΈ°μ© λ³μκΈ°λ₯Ό λ체νλ©΄ GISμ bayλΉ λμ΄ 11% μΆμμ SF6 μΆ©μ§λμ μ΅μ 10% κ°μμν€λ ν¨κ³Όκ° μμ κ²μΌλ‘ κΈ°λνλ€.I μ λ‘ 1
II μ΄ λ‘ 4
1. κ³ μ μ μΈ‘μ 4
2. μ€νμ΄μ λΆμκΈ° 8
III μ€κ³ λ° μ μ 13
1. μ©λμ± λΆμμΌμ 14
2. μ μ ν΄λ‘μ΄ 18
IV νκ° λ° λΆμ 21
1 μ€νκ³ 21
2 μ€ν λ° λΆμ 23
V κ²° λ‘ 27Maste
μ μ 곡λͺ μμ νλΌμ¦λ§λ₯Ό μ΄μ©ν κΈμν 곡μ μ μ μ¨ κΈ°ν μΈμ νμ λν μ°κ΅¬
νμλ
Όλ¬Έ(μμ¬)--μμΈλνκ΅ λνμ :무기μ¬λ£κ³΅νκ³Ό,1998.Maste
Surgical Outcomes After Open, Laparoscopic, and Robotic Gastrectomy for Gastric Cancer
BACKGROUND: In contrast to the significant advantages of laparoscopic versus open gastrectomy, robotic gastrectomy has shown little benefit over laparoscopic gastrectomy. This study aimed to compare multi-dimensional aspects of surgical outcomes after open, laparoscopic, and robotic gastrectomy.
METHODS: Data from 915 gastric cancer patients who underwent gastrectomy by one surgeon between March 2009 and May 2015 were retrospectively reviewed. Perioperative parameters were analyzed for short-term outcomes. Surgical success was defined as the absence of conversion to open surgery, major complications, readmission, positive resection margin, or fewer than 16 retrieved lymph nodes.
RESULTS: This study investigated 241 patients undergoing open gastrectomy, 511 patients undergoing laparoscopic gastrectomy, and 173 patients undergoing robotic gastrectomy. For each approach, the respective incidences were as follows: conversion to open surgery (not applicable, 0.4%, and 0%; p = 0.444), in-hospital major complications (5.8, 2.7, and 1.2%; p = 0.020), delayed complications requiring readmission (2.9, 2.0, and 1.2%; p = 0.453), positive resection margin (1.7, 0, and 0%; p = 0.003), and inadequate number of retrieved lymph nodes (0.4, 4.1, and 1.7%; p = 0.010). Compared with open and laparoscopic surgery, robotic gastrectomy had the highest surgical success rate (90, 90.8, and 96.0%). Learning-curve analysis of success using cumulative sum plots showed success with the robotic approach from the start. Multivariate analyses identified age, sex, and gastrectomy extent as significant independent parameters affecting surgical success. Surgical approach was not a contributing factor.
CONCLUSIONS: Open, laparoscopic, and robotic gastrectomy exhibited different incidences and causes of surgical failure. Robotic gastrectomy produced the best surgical outcomes, although the approach method itself was not an independent factor for success.restrictio