44 research outputs found
λΆκ΄λ²μ μ΄μ©ν 무μ λμ λΆν μ€ μ‘°κΈ° κ²μΆκ³Ό μ μ₯ μ€ μ μ λ μΈ‘μ κΈ°μ κ°λ°
Get PDFνμλ
Όλ¬Έ (λ°μ¬)-- μμΈλνκ΅ λνμ λμ
μλͺ
κ³Όνλν λ°μ΄μ€μμ€ν
Β·μμ¬νλΆ, 2017. 8. κΉμ©λ
Έ.λΆνμ₯μμ μ μμ μΈ λΆν μ¬λΆλ₯Ό νλ³νκΈ° μν 1μ°¨ κ²λμ μΌλ°μ μΌλ‘ 5μΌβΌ7μΌ μ΄νμ μΈλ ₯μ μν΄ μνλλ©°, 무μ λκ³Ό λ°°μκ° λ°μνμ§ μμ μλ€μ λͺ¨λ νκΈ° μ²λΆλλ€. λ―Έλ°μλμ λ³΄λ€ λ λΉ λ₯Έ μκ°(3μΌ μ΄λ΄) μμ μλ κ²μΆν κ²½μ° λΆνμ μμλλ μΈλ ₯ λ° μλμ§μ κ°μ ν¨κ³Όμ 무μ λμ λ€λ₯Έ μ©λλ‘ νμ©ν μ μμμ κΈ°λν μ μλ€. λ³Έ μ°κ΅¬λ κΈ°μ‘΄μ κ³Όμ€μ λΉλ‘―ν λμ°λ¬Ό λΉνκ΄΄ νμ§νλ³μ μ μ©λκ³ μλ λΆκ΄λΆμλ²κ³Ό μλ£ μ§λ¨μ μ¬μ©λλ MRI κΈ°μ μ μ΄μ©νμ¬ λ¬΄μ λ(λ°°λ°μ λ―Έλ°μλ ν¬ν¨)μ μ‘°κΈ° νλ³ κΈ°μ μ κ°λ°νκ³ λμκ°μ λΆκ΄λΆμλ²μ μ΄μ©νμ¬ λ¬΄μ λμ μ μ λ μΈ‘μ κΈ°μ μ κ°λ°νλλ° λͺ©μ μ΄ μμΌλ©° μ°κ΅¬ κ²°κ³Όλ₯Ό μμ½νλ©΄ λ€μκ³Ό κ°λ€.
1. λΆν μ€μΈ κ³λμ λμμΌλ‘ ν¬κ³Ό μ€ννΈλΌμ μΈ‘μ νκΈ° μν΄ μ²μ LEDμ λ
Ήμ LEDλ‘ κ΅¬μ±λλ κ°μκ΄ λμ κ΄μ μ₯μΉμ(κ΄μA) ν λ‘κ²λ¨νλ₯Ό μΆκ°ν κ°μ λ° κ·Όμ μΈμ λμμ κ΄μ μ₯μΉ(κ΄μB)λ₯Ό ꡬμ±νκ³ , μ°λκ³μΈ νμ΄λΌμΈ λΈλΌμ΄μ’
μ κ°μλμ λμμΌλ‘ μΈ‘μ ν ν¬κ³Ό μ€ννΈλΌμ μ΄μ©νμ¬ μ ·무μ λ νλ³μ μν PLS-DAλͺ¨λΈμ κ°λ°νμλ€. κ°λ°λ PLS-DA νλ³ λͺ¨λΈμμ κ°μκ΄ μμ(440βΌ800nm)μ κ²½μ°μλ λΆν 40μκ°λΆν°, κ°μ/κ·Όμ μΈμ (440βΌ950nm) μμμ κ²½μ°μλ λΆν 22μκ°λΆν° μ ·무μ λ νλ³μ¨μ΄ 90%μ λλ‘ λνλ¬μΌλ©° μκ°μ΄ μ§λ μλ‘ νλ³μ¨μ΄ μ½κ° μ¦κ°νκ³ λͺ¨λΈμ μμ μ±μ΄ ν₯μλμλ€. κ²°κ³Όμ μΌλ‘ λΆν 56μκ° μ λμμ νλ³μ¨μ΄ 92%μ΄μ λλ κ²μΌλ‘ νλͺ
λμλ€. μ΄μ κ°μ μ‘°κΈ° νλ³ κ²°κ³Όλ κ΄μ μ₯μΉμμ 450nm λμμ μ²μ κ΄μμ κ°ννκ³ , λ³Έ μ°κ΅¬μμ κ°λ°ν μμ μ€ννΈλΌμ μ΄μ©ν μ κ·ν μ μ²λ¦¬μ κ΄κ³κ° κΉμ κ²μΌλ‘ μκ°λλ€.
2. 1.0T MRI μ₯λΉλ₯Ό μ΄μ©νμ¬ TR=14ms, TE=4ms, Flip angle=20Β°μΌλ‘ μ€μ νκ³ μΆ λ°©ν₯μ 64κ° μ¬λΌμ΄μ€ μμμ μΈ‘μ νμλ€. λΆν μ€ λ
Έλ₯Έμ νμμ λ³νλ₯Ό μ λννκΈ° μν΄ λ
Έλ₯Έμμ μ€κ³½μ μΆμΆ λ° μΆμΆν μμμ μ€μ¬(centroid), μνλ, μ₯λ¨μΆ λΉ λ±μ λΆμν μ μλ μμ μ²λ¦¬ μκ³ λ¦¬μ¦μ κ°λ°νμλ€. κ³λ μ€μ λΆμ μ¬λΌμ΄μ€μ νκ· μμ μ 보λ₯Ό μ΄μ©νμ¬ λ
Έλ₯Έμμ μνλμ μ₯λ¨μΆ λΉ λ±μ νμ μ§μλ₯Ό ꡬνκ³ , μ ·무μ λμ νλ³ν κ²°κ³Ό νλ³μ¨μ λΆν 72μκ°μμ κ°κ° 98.3% λ° 95%λ₯Ό λνλ΄μλ€.
3. MR μμ λΆμμμ ꡬν λ
Έλ₯Έμμ μ₯λ¨μΆ λΉμ κ°μ/κ·Όμ μΈμ μμμμ μ»μ μ€ννΈλΌμ PLSRμ μ΄μ©νμ¬ μμΈ‘ν κ²°κ³Ό Rμ SEPκ° κ°κ° 0.46132, 0.11634μ΄μλ€. MR μμμ μ΄μ©ν νμ μ§μ λΆμ κ²°κ³Όμ μ°κ³νμ¬ μ ·무μ λ νλ³μ μν PLSR λͺ¨λΈ κ°λ°μ μμ΄ μΆκ°μ μΈ μ°κ΅¬λ λͺ¨λΈμ μ±λ₯ ν₯μμ μν΄ νμν κ²μΌλ‘ νλ¨λλ€.
4. 무μ λμ μ μ λ(νΈμ°μ λ, HU)λ₯Ό μμΈ‘νκΈ° μν΄ κ°μ/κ·Όμ μΈμ κ΄μ μ₯μΉλ₯Ό ꡬμ±νκ³ , κ°μλκ³Ό λ°±μλμ λμμΌλ‘ ν¬κ³Ό μ€ννΈλΌμ μΈ‘μ νμ¬ PLSR λͺ¨λΈμ κ°λ°νμλ€. κ°μλμμ HU μμΈ‘ κ²°κ³Όλ =0.72132, SEP=8.84, bias=0.11729, μ€μ°¨ 13.63%μ΄μμΌλ©°, λ°±μλμ κ²½μ° =0.92162, SEP=5.27, bias=0.26917, μ€μ°¨=8.70%μ΄μλ€.β
. μλ‘ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 1
β
‘. μ°κ΅¬μ¬ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 4
2.1. κ³λμ ꡬ쑰 λ° μμ± κ³Όμ Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 4
2.2. μ μ λκ³Ό λΆν κ³Όμ Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 7
2.3. κ³λμ νν μ λ³ κΈ°μ Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 9
2.4. κ°μ/κ·Όμ μΈμ λΆκ΄λ²μ μ΄μ©ν λ΄λΆ νλ³ β₯β₯β₯β₯β₯ 10
2.4.1. μ μ λΒ·νλ νλ³ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 10
2.4.2. μ μ λ νλ³ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 10
2.5. μ기곡λͺ
μμ(MRI)κΈ°μ μ μ΄μ©ν λ΄λΆ νλ³ β₯β₯β₯ 12
2.6. κΈ°ν κΈ°μ μ μ΄μ©ν λ΄λΆ νλ³ Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 14
β
’. κ°μ/κ·Όμ μΈμ λΆκ΄λ²μ μ΄μ©ν 무μ λ μ‘°κΈ° κ²μΆ 15
3.1. μμΈ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 15
3.2. μ΄λ‘ μ λ°°κ²½ Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 17
3.2.1. κ°μ/κ·Όμ μΈμ μ ν‘μ μ리 λ° νΉμ§ β₯β₯β₯β₯β₯β₯ 17
3.2.2. κ°μ/κ·Όμ μΈμ μ ν‘κ΄λ μΈ‘μ β₯β₯β₯β₯β₯β₯β₯β₯β₯ 18
3.2.3. μ€ννΈλΌμ μ μ²λ¦¬ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 19
3.2.4. λΆκ΄λΆμ μμΈ‘ λͺ¨λΈ κ°λ°κ³Ό μ±λ₯ νκ° β₯β₯β₯β₯β₯ 22
3.3. μ¬λ£ λ° λ°©λ² Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 25
3.3.1. κ΄μμ μ ν β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 25
3.3.2. 곡μ μ¬λ£ λ° μ€ν μ₯μΉ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 30
3.3.3. ν¬κ³Ό μ€ννΈλΌ μΈ‘μ λ° λΆμ β₯β₯β₯β₯β₯β₯β₯β₯β₯ 32
3.3.4. μ ·무μ λμ νλ³ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 34
3.4. κ²°κ³Ό λ° κ³ μ°° Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 35
3.4.1. λΆν μκ°μ λ°λ₯Έ μ€ννΈλΌμ λ³ν β₯β₯β₯β₯β₯β₯ 35
3.4.2. λΆν μκ°μ λ°λ₯Έ μκ΄κ³μμ λ³ν β₯β₯β₯β₯β₯β₯ 42
3.4.3. μ ·무μ λμ νλ³ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 46
3.5. μμ½ λ° κ²°λ‘ Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 52
β
£. MR μμ λΆμμ μ΄μ©ν 무μ λμ μ‘°κΈ° κ²μΆ λ°
λΆκ΄λΆμλ²μ μν νμ μ§μ μμΈ‘ β₯β₯β₯β₯β₯β₯β₯ 54
4.1. μμΈ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 54
4.2. μ¬λ£ λ° λ°©λ² β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 56
4.2.1. 곡μ μ¬λ£ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 56
4.2.2. MRI μ₯λΉ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 57
4.2.3. νΈλ μ΄ λ° νλμ μ μ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 58
4.2.4. λΆν κ³Όμ λͺ¨λν°λ§ λ° MR μμμ νλ β₯β₯β₯β₯ 60
4.2.5. νμ μ§μμ μ€μ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 67
4.2.6. νμ μ§μ μμΈ‘μ μν ν¬κ³Ό μ€ννΈλΌ μΈ‘μ λ° λΆμ 68
4.3. κ²°κ³Ό λ° κ³ μ°° Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 70
4.3.1. λΆν μκ°μ λ°λ₯Έ MR μμμμμ νμ λ³ν β₯β₯ 70
4.3.2. μ μ λΆν νλ³μ© νμ μ§μ κ°λ° β₯β₯β₯β₯β₯β₯β₯ 75
4.3.3. PLSRμ μν λ
Έλ₯Έμ μ₯λ¨μΆλΉμ λ³ν μμΈ‘ β₯β₯ 81
4.4. μμ½ λ° κ²°λ‘ Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 88
β
€. κ°μ κ·Όμ μΈμ λΆκ΄λ²μ μ΄μ©ν μ μ₯ μ€ κ³λμ
μ μ λ (Haugh Unit) μμΈ‘ β₯β₯β₯β₯β₯β₯β₯β₯β₯ 90
5.1. μμΈ Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 90
5.2. μ΄λ‘ μ λ°°κ²½ Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 92
5.3. μ¬λ£ λ° λ°©λ² Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 95
5.3.1. 곡μ μ¬λ£ λ° μ€ν μ₯μΉ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 95
5.3.2. μ€ν λ° λ°μ΄ν° νλ λ°©λ² β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 96
5.3.3. μ€ννΈλΌ μ μ²λ¦¬ λ° λͺ¨λΈ κ°λ° β₯β₯β₯β₯β₯β₯β₯β₯ 97
5.4. κ²°κ³Ό λ° κ³ μ°° Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 98
5.4.1. μ€ννΈλΌ νν λ° Haugh Unitμ λ³ν Β·β₯β₯β₯β₯ 98
5.4.2. μ μ²λ¦¬ ν¨κ³Ό β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 100
5.4.3. λͺ¨λΈμ μ±λ₯ νκ° β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 102
5.5. μμ½ λ° κ²°λ‘ Β·β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 108
β
₯. μ’
ν© κ²°λ‘ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 109
β
¦. μ°Έκ³ λ¬Έν β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 111
λΆλ‘ β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 117
Abstract β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯β₯ 143Docto
Determination of lithium diffusion coefficient and reaction mechanism into ultra-small nanocrystalline SnO2 particles
No full textHigh-performance electrode materials for lithium-ion batteries (LIBs) are urgently required to meet the re- quirement of the widespread use of energy storage devices from small-to large-scale applications. In this regard, ultra-small nanocrystalline SnO2 particles with a size of ∼3 nm are synthesized using a simple hydrothermal method and investigated as a high capacity anode material for LIBs. The SnO2 anode shows a high reversible capacity of 1026 mAh g−1 at a current density of 150mAg−1. The kinetic study of the anode material is conducted and compared using cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic intermittent titration techniques and the lithium diffusion coefficient at open circuit potential is calculated to be 3.71978 × 10−13, 1.818 × 10−14, and ∼1.82 × 10−16 cm2 s−1, respectively. The reaction mechanism of highly reversible SnO2 nanoparticles is investigated using ex-situ XRD, XPS, in-situ X-ray absorption near edge spec- troscopy, and TEM and the results reveal the formation of lithium-tin alloy in the lithiated electrode and re- versible formation of SnO2 upon delithiation.This research was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation funded by the Ministry of Science & ICT (grant number: 2017M1A2A2044482) and the R&D Convergence Program of National Research Council of Science & Technology of Republic of Korea
Facile and cost-effective methodology to fabricate MoS2 counter electrode for efficient dye-sensitized solar cells
No full textInterests in the development of economical and high-efficiency counter electrodes (CEs) of dye-sensitized solar cell (DSSC) to replace the excessively cost and scarce platinum (Pt) CEs have been increased. In this report, we demonstrate a facile chemical bath deposition (CBD) route to prepare layered MoS2/fluorine-doped tin oxide (FTO) films that directly act as the CEs of DSSCs. A DSSC containing the CBD-synthesized MoS2/FTO CE (prepared at 0.03 M Mo source concentration, 90 degrees C bath temperature and 30 min deposition time) exhibits high power conversion efficiency (PCE) of 7.14%, which is approaching that of DSSC with Pt/FTO CE (8.73%). The electrocatalytic activity of the MoS2/FTO and Pt/FTO CEs are discussed in detail with their cyclic voltammetry (CV), Tafel polarization curves, and electrochemical impedance spectra (EIS). The observed results indicate that our low-cost CE has a high electrocatalytic activity for the reduction of triiodide to iodide and a low charge transfer resistance at the electrolyte-electrode interface with a comparable state to that of a Pt/FTO CE.This work was supported by the Ministry of Trade, Industry and Energy (MOTIE, 10051565) and Korea Display Research Corporation (KDRC) support program for the development of future devices technology for display industry. This work was partially supported by the GRRC program of Gyeonggi province [GRRC AJOU 2016803, Photonics-Medical Convergence Technology Research Center]. Part of this work was supported by the Ministry of Trade, Industry and Energy under Sensor Industrial Technology Innovation Program (Project No. 10063682)
κ³ μ²΄ μλ₯΄κ³€ λ΄μμ λ²€μ (ν λ‘λ²€μ )κ³Ό μ칼리 κΈμκ°μ μνΈ μμ© : μ μΈμ λΆκ΄λ²μ μ°κ΅¬
No full textThesis (doctoral)--μμΈλνκ΅ λνμ :ννκ³Ό 물리ννμ 곡,1995.Docto
The influence of crystallinity in carbon fiber reinforced PET composites at various temperature
No full textThis work was supported by the industrial Strategic technology Development Program(10076562,Development of fiber reinforced thermoplastic nano-composite via fiber bundle spreading for high quality resin impregnation process and its application to the underbody shield component for protecting battery pack of an electric-vehicle) funded By Ministry of Trade, industry & Energy(MI,Korea). This research was also supported by the National Research Foundation of Korea(NRF) funded by the Ministry of Education(2012R1A6A1029029 and 2018R1D1A1A09083236)
A study on copper/silver core-shell microparticles with silver nanoparticles hybrid ink and its sintering characteristics with flash light for oxidation resistance
No full textThis work was supported by Materials & Components Technology Development Program (20002957,Development of AgNW RGO transparent electrode material and process based on IPL for OPV) funded by the Ministry of Trade, Industry&Energy (MOTIE,Korea). This research was also supported by the National Research Foundation of Korea(NRF) funded by the Ministry of Education(2012R1A6A1029029 and 2018R1D1A1A09083236)
λΆνμ€μ±μ κ°λ λΉμ ν μ보μμ€ν μ κ°μΈμ μ΄
No full textThesis (doctoral)--μμΈλνκ΅ λνμ :κΈ°κ³ν곡곡νλΆ,2002.Docto
Development of a WS2/MoTe2 heterostructure as a counter electrode for the improved performance in dye-sensitized solar cells
No full textA facile large-area synthesis of a WS2/MoTe2 heterostructure via a sputtering-CVD approach on conductive glass substrates was demonstrated and, for the first time, it was used as a counter electrode (CE) for dye-sensitized solar cells (DSSCs). Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel curves verified that the unique structure is beneficial for improving the catalytic activity for the reduction of triiodide to iodide and a low charge transfer resistance at the electrode/electrolyte interface. The thicknesses of the top and bottom layers of WS2/MoTe2 were varied to achieve high DSSC performance. Consequently, DSSCs assembled with the optimized WS2/MoTe2 CE reached a high power conversion efficiency (PCE) of 7.99%, which is comparable to the conventional Pt CE (8.50%) and their pristine WS2 and MoTe2 CEs (6.3% and 7.25%, respectively). Our findings create a way to prepare DSSCs with efficient performance.This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (2010-0020207, 2017R1C1B5076952, and 2012R1A6A1029029), by the MOTIE (10052928) and the KSRC (Korea Semiconductor Research Consortium) support programs for the development of future semiconductor devices. This research was also supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry, and Energy (MOTIE) of the Republic of Korea (20172010106080)
