159 research outputs found

    νšŒμ „ν•˜λŠ” λΈ”λž™ν™€κ³Ό λ°€μ§‘μ„±μ˜ μ–‘μž μ μž…μž 근사

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    ν•™μœ„λ…Όλ¬Έ (박사) -- μ„œμšΈλŒ€ν•™κ΅ λŒ€ν•™μ› : μžμ—°κ³Όν•™λŒ€ν•™ 물리학과, 2020. 8. 이상민.Gravitational wave observatories targeted for compact binary coalescence, such as LIGO and VIRGO, require various theoretical inputs for their efficient detection. One of such inputs are analytical description of binary dynamics at sufficiently separated orbital scales, commonly known as post-Newtonian dynamics. One approach for determining such two-body effective Hamiltonians is to use quantum scattering amplitudes. This dissertation aims at an improved understanding of classical physics of spinning bodies in quantum scattering amplitudes, for application to the problem of effective two-body Hamiltonians. The main focus will be on spin-induced higher-order multipole moments. In this dissertation results for the first post-Minkowskian order (linear in Newton's constant G and to all orders in relative momentum p^2) Hamiltonian that is valid for arbitrary compact spinning bodies to all orders in spin is presented. Next, obstruction and prospects for the formulation's extension to second post-Minkowskian order is discussed, based on an equivalent loop order quantum field theory computations. This dissertation is based on the works [1-4]LIGOλ‚˜ VIRGO와 같이 λ°€μ§‘μŒμ„±κ³„(compact binary coalescence)λ₯Ό μ£Όμš” 쀑λ ₯νŒŒμ›μœΌλ‘œ μ‚ΌλŠ” 쀑λ ₯파 κ²€μΆœκΈ°μ—μ„œλŠ” 효과적인 쀑λ ₯파 κ²€μΆœμ„ μœ„ν•΄ λ‹€μ–‘ν•œ 이둠적 도ꡬλ₯Ό ν•„μš”λ‘œ ν•œλ‹€. κ·ΈλŸ¬ν•œ 이둠적 도ꡬ 쀑 ν•˜λ‚˜λŠ” μΆ©λΆ„ν•œ 거리λ₯Ό 두고 κ³΅μ „ν•˜κ³  μžˆλŠ” μŒμ„±κ³„μ˜ 동역학에 λŒ€ν•œ 해석적 λ¬˜μ‚¬λ‘œ, 포슀트-뉴턴 μ „κ°œ(post-Newtonian expansion)λž€ μ΄λ¦„μœΌλ‘œ 널리 μ•Œλ €μ Έ μžˆλ‹€. μ΄λŸ¬ν•œ 이체 문제의 유효 ν•΄λ°€ν† λ‹ˆμ•ˆμ„ κ΅¬ν•˜λŠ” 방법 쀑 ν•˜λ‚˜λŠ” μ–‘μžμ—­ν•™μ  μ‚°λž€μ§„ν­μ„ μ΄μš©ν•˜λŠ” 것이닀. 이 ν•™μœ„λ…Όλ¬Έμ€ 이체 문제의 유효 ν•΄λ°€ν† λ‹ˆμ•ˆμ„ κ΅¬ν•˜λŠ” λ¬Έμ œμ— μ‘μš©λ  수 μžˆλ„λ‘ μ–‘μžμ—­ν•™μ  μ‚°λž€μ§„ν­μ— ν¬ν•¨λœ νšŒμ „ν•˜λŠ” 물체의 고전물리 쀑 μŠ€ν•€μ— μ˜ν•΄ μƒμ„±λœ κ³ μ°¨ 닀쀑극(multipole moment) 효과의 이해λ₯Ό λͺ©ν‘œλ‘œ ν•œλ‹€. 이 λ…Όλ¬Έμ—μ„œλŠ” μž„μ˜μ˜ νšŒμ „ν•˜λŠ” 밀집성에 λŒ€ν•΄ μŠ€ν•€μ˜ λͺ¨λ“  차수 효과λ₯Ό κ³ λ €ν•œ 일차 포슀트-λ―Όμ½”ν”„μŠ€ν‚€ μ „κ°œ (λ‰΄ν„΄μƒμˆ˜ G에 λŒ€ν•΄ μ„ ν˜•μ΄λ©° μƒλŒ€μš΄λ™λŸ‰ p^2에 λŒ€ν•΄ λͺ¨λ“  차수λ₯Ό 포함) 유효 ν•΄λ°€ν† λ‹ˆμ•ˆμ„ μ œμ‹œν•œλ‹€. λ‹€μŒμœΌλ‘œ 이 방법둠을 이차 포슀트-λ―Όμ½”ν”„μŠ€ν‚€ μ „κ°œλ‘œ ν™•μž₯ν•  λ•Œμ˜ μž₯애와 전망에 λŒ€ν•΄ λ™λ“±ν•œ 차수의 μ–‘μžμž₯λ‘  계산을 톡해 λ…Όν•œλ‹€. 이 ν•™μœ„λ…Όλ¬Έμ€ [1-4]의 논문을 λ°”νƒ•μœΌλ‘œ ν•œλ‹€.Chapter 1 Introduction 1 Chapter 2 Preliminaries 6 2.1 Effective field theory for binary dynamics 6 2.1.1 Overview of effective field theory for gravitational radiation from stellar binaries 6 2.1.2 The point particle effective action 9 2.2 Analyticity properties of the S-matrix 11 2.2.1 Simple poles and one-particle states 12 2.2.2 The optical theorem and Cutkosky rules 15 2.2.3 Generalised unitarity and scalar integral coefficients 17 2.3 The on-shell formalism for the S-matrix 21 2.3.1 The spinor-helicity formalism 22 2.3.2 Spinor-helicity for massive particles 23 2.3.3 Little group constraints of amplitudes 25 2.3.4 Kinematical constraints for three-point amplitudes 26 2.4 Two-body effective Hamiltonians from quantum scattering amplitudes 28 2.4.1 Classification of perturbative general relativity 28 2.4.2 Mapping amplitudes to effective Hamiltonians 29 2.4.3 The classical limit of finite spin particles 31 Chapter 3 Applications at tree level 34 3.1 The gravitational three-point amplitude 34 3.1.1 Amplitudes from point particle effective action 34 3.1.2 Hilbert space matching 37 3.1.3 The residue integral representation 44 3.2 Constructing the 1PM Hamiltonian from amplitudes 46 3.2.1 Kinematics for 1PM computation 46 3.2.2 1PM amplitude 48 3.2.3 Thomas-Wigner rotation 50 3.2.4 Complete 1PM potential 53 3.3 1PM potential at each spin order 54 3.3.1 Linear in spin 56 3.3.2 Quadratic in spin 57 3.3.3 Cubic in spin 58 3.3.4 Quartic in spin 59 3.4 Reproducing 1PM part of PN expansion 61 3.4.1 Linear in spin (up to NNNLO) 62 3.4.2 Quadratic in spin (up to NNLO) 65 Chapter 4 Obstructions and applications at one-loop level 73 4.1 The gravitational Compton amplitude 73 4.1.1 The naive gravitational Compton amplitude 73 4.1.2 Resolving the spurious pole of naive Compton amplitude 75 4.2 Matter stress tensor for Kerr-Newman black holes 77 4.2.1 Classical computations in Kerr-Schild coordinates 78 4.2.2 Quantum field theory computations 83 4.3 One-loop amplitude for 2PM spinning BH Hamiltonian at HCL 95 4.3.1 Kinematical set-up 97 4.3.2 The box integral contribution at HCL 99 4.3.3 The triangle integral contribution at HCL 100 4.4 Discussions and outlook for one-loop order 102 Chapter A Conventions 104 A.1 Invariant tensors 104 A.2 Analytic continuation and complex conjugation 105 A.3 Numerical implementations and the high-energy limit 106 A.4 Dirac spinors 108 A.5 Polarisation vectors 108 A.6 BOLD notation 109 초둝 126 κ°μ‚¬μ˜ κΈ€ 127Docto

    Plea Bargaining as a Mean to Maximum Sentence

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    This paper outlines the findings of a model of plea bargaining with multiple defendants, in which a prosecutor makes plea offer sequentially. It is shown that plea discount can be minimized with sequential offers and that not all of defendants shall be inβ… . Introduction β…‘. Model β…’. Equilibrium with Sequential Plea Bargaining β…£. Concluding Remarks Reference

    Research Tournament and Competition Effect

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    This paper investigates the effect of competition on innovative activity. In the research contest, the foremost reason for limiting entry into tournaments is to raise the level of contestant’s effort and to make the ?rms compete so that high value of innβ… . Introduction γ€€β…‘. Research Contest and Competition γ€€β…’. Concluding Remark γ€€Reference

    Analysis on Procurement Auction System in Public Procurement Service

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    This paper considers the effect of various types of procurement auction system on competition focusing on the rate of successful bidding. We analyze the number of bidders and the rate of successful bids using online procurement data of the Public Procuremβ… . μ„œ λ‘  β…‘. μž…Β·λ‚™μ°° 자료 뢄석 γ€€1. μž¬μ •νˆ¬μžμ‚¬μ—…μ˜ μž…Β·λ‚™μ°° 뢄석 γ€€γ€€κ°€. 쑰달청 μž…Β·λ‚™μ°° 자료의 κ°œμš” γ€€γ€€λ‚˜. μž…Β·λ‚™μ°° 자료의 싀증뢄석 γ€€2. μž¬μ •μ‚¬μ—…μ˜ ν„΄ν‚€ 및 λŒ€μ•ˆ 사업 γ€€γ€€κ°€. ν„΄ν‚€ 및 λŒ€μ•ˆ μ‚¬μ—…μ˜ μž…Β·λ‚™μ°° ν˜„ν™© γ€€γ€€λ‚˜. ν„΄ν‚€Β·λŒ€μ•ˆμ œ μž…Β·

    Analysis on the Welfare Effect of the PPP Implementation

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    This study investigates the welfare implications of BTL projects using a general equilibrium model with the public sector and public-private partnerships. We show that when the government is not allowed to run budget deficits but private firms is able toβ… . μ„œ λ‘  γ€€β…‘. λͺ¨ ν˜• γ€€β…’. μž¬μ •μ‚¬μ—… γ€€β…£. λ―Όκ°„νˆ¬μžμ‚¬μ—… γ€€β…€. λ―Όκ°„νˆ¬μžμ‚¬μ—… μΆ”μ§„μ˜ 효과 γ€€β…₯. κ²°

    μ„œμšΈμ‹œμ˜ μ“°λ ˆκΈ° κ΄€λ¦¬μ œλ„ κ°œμ„ λ°©μ•ˆ

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    μš°λ¦¬λ‚˜λΌμ˜ 전톡적인 μƒν™œλ¬Έν™”μ—μ„œλŠ” 아무데도 μ“Έλͺ¨κ°€ μ—†μ–΄μ„œ λ²„λ €μ•Όλ§Œ ν•  μ“°λ ˆκΈ°λΌλŠ” 것은 거의 μ—†μ—ˆλ‹€. μŒμ‹μ°ŒκΊΌκΈ°λŠ” 가좕에 λ¨Ήμ΄λŠ” μ‚¬λ£Œμ΄κ³  μž¬λ‚˜ 뢄뇨등 λ‹€λ₯Έ μ“°λ ˆκΈ°λŠ” ν‡΄λΉ„λ‘œ μ΄μš©λ˜μ—ˆλ‹€. 그리고 ν™˜κ²½μ˜€μ—Όν–‰μœ„λŠ” μ§€κΈˆμœΌλ‘œμ„œλŠ” μƒμƒν•˜κΈ° μ–΄λ €μšΈ μ •λ„λ‘œ μ—„ν•œ 벌둜 λ‹€μŠ€λ €μ‘Œμ—ˆλ‹€. μ„œμšΈμ€ 1394년에 μˆ˜λ„κ°€ 된 이후 1660년에 인ꡬ 20만의 λ„μ‹œλ‘œ μ„±μž₯ν•˜μ—¬ κ·Ό200λ…„κ°„ 이 μΈκ΅¬μˆ˜μ€€μ—μ„œ λ¨Έλ¬Όλ €μ§€λ§Œ κ΅­κ°€κ°€ μ“°λ ˆκΈ° 처리λ₯Ό λ‹΄λ‹Ήν•œ 적은 μ—†μ—ˆλ‹€. κ·ΈλŸ¬λ©΄μ„œλ„ 유럽의 μ‚¬λžŒλ“€μ΄ 감탄할 μ •λ„λ‘œ ν‹°λŒ μ—†λŠ” κΉ¨λ—ν•œ λ„μ‹œν™˜κ²½μ„ 가지고 μžˆμ—ˆλ‹€. μ΄λŠ” μ“°λ ˆκΈ°λ₯Ό 각 κ°€μ •μ—μ„œ μ™„λ²½ν•˜κ²Œ λ‹€ μ²˜λ¦¬ν•΄ μ£Όμ—ˆκΈ° λ•Œλ¬Έμ΄λ‹€. μ„œμšΈμ— 처음으둜 μ“°λ ˆκΈ° 처리 쑰직이 생긴 것은 μ„œμšΈμ— 외ꡭ인듀이 λͺ°λ €μ˜¨ 이후인데 1907년에 일본인듀이 ν•œμ„±μœ„μ›νšŒλ₯Ό μ‘°μ§ν•˜μ—¬ μ“°λ ˆκΈ° μˆ˜κ±°μ—…λ¬΄λ₯Ό μ‹œμž‘ν•œ 것이 μ²˜μŒμ΄λ‹€. 그리고 μΌμ œμΉ˜ν•˜μ—μ„œμ˜ μ“°λ ˆκΈ° μˆ˜κ±°λ„ 주둜 일본인듀을 μœ„ν•œ κ²ƒμ΄μ—ˆλ‹€. ν•΄λ°© μ΄ν›„μ—λŠ” μ„œμšΈμ‹œκ°€ μ“°λ ˆκΈ° 관리업무λ₯Ό 맑게 λ˜μ—ˆμ§€λ§Œ 1960λ…„λŒ€μ— 이λ₯΄κΈ°κΉŒμ§€λ„ μ“°λ ˆκΈ° λ¬Έμ œκ°€ μ‹¬κ°ν•œ λ„μ‹œλ¬Έμ œλ‘œ λ“±μž₯ν•˜μ§€λŠ” μ•Šμ•˜μ—ˆλ‹€. μ‹œλ―Όλ“€μ€ μ—¬μ „νžˆ 전톡적언 λ°©λ²•μœΌλ‘œ μ“°λ ˆκΈ°λ¬Έμ œλ₯Ό ν•΄κ²°ν•΄ μ™”κΈ° λ•Œλ¬Έμ΄λ‹€. κ·Έλž˜μ„œ 1962λ…„κΉŒμ§€λ§Œ 해도 μ“°λ ˆκΈ°λŠ” 뢄뇨와 λ”λΆˆμ–΄ λ³΄κ±΄μœ„μƒκ΅­οΌŒ 경찰ꡭ, μ‚¬νšŒκ΅­ λ“± μ“°λ ˆκΈ°μ™€λŠ” 동떨어져 λ³΄μ΄λŠ” λΆ€μ„œμ—μ„œ λΆ€μˆ˜μ μΈ 업무 μ •λ„λ‘œ μ·¨κΈ‰ν–ˆμ„ 뿐이닀. 1960λ…„λŒ€μ— 이λ₯΄μž μ‚°μ—…ν™”κ°€ μ‹œμž‘λ˜λ©΄μ„œ ν™”ν•™λΉ„λ£Œκ°€ 퇴비λ₯Ό λŒ€μ²΄ν•˜κΈ° μ‹œμž‘ν•˜κ³  또 ν‡΄λΉ„ν™”ν•˜κΈ° μ–΄λ €μš΄ μ“°λ ˆκΈ°λ“€μ΄ λ‚˜μ˜€κΈ° μ‹œμž‘ν•˜μ˜€λ‹€. κ·ΈλŸ¬λ©΄μ„œ μ“°λ ˆκΈ°λ¬Έμ œκ°€ λŒ€λ‘λ˜μž μ„œμšΈμ‹œλŠ” 1962년에 μ²­μ†Œκ΅­μ„ μ‹ μ„€ν•˜κΈ°μ— 이λ₯΄λ €λ‹€. κ·ΈλŸ¬λ‚˜ μ²­μ†Œκ΅­μ€ λΆ„λ‡¨μˆ˜κ±°μ— μ£Όλ ₯ν•˜μ˜€μœΌλ©° μ“°λ ˆκΈ°λŠ” 아직도 큰 λ¬Έμ œκ±°λ¦¬λŠ” μ•„λ‹ˆμ—ˆλ‹€. μ™œλƒν•˜λ©΄ λ„μ‹œ 주변에 μ“°λ ˆκΈ° 버릴 곳이 μ–Όλ§ˆλ“ μ§€ μžˆμ—ˆκΈ° λ•Œλ¬Έμ΄λ‹€. λ„μ‹œκ°€ κΈ‰κ²©ν•˜κ²Œ νŒ½μ°½ν•˜λŠ” 과정에 λ„μ‹œ λ³€λ‘λ¦¬μ˜ 농경지 같은 μ €μ§€λŒ€κ°€ λ„μ‹œμ§€μ—­μœΌλ‘œ 개발되기 μœ„ν•΄μ„œλŠ” μ–΄μ°¨ν”Ό 맀랩이 λ˜μ–΄μ•Ό ν–ˆκΈ° λ•Œλ¬Έμ΄λ‹€

    Analysis on Bidding Behavior in Score Auction: Highway BTO Projects

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    Upon selecting preferred bidder in Public-Private Partnership projects, multi-dimensional procurement auction, where price factor and non-price factor are evaluated, is used. This paper tries to analyze bidding data in BTO road projects. It is shown thatβ… . λ―Όκ°„νˆ¬μžμ‚¬μ—…κ³Ό κ²½μŸμ κ²½λ§€μ œλ„ γ€€β…‘. κ΅­λ‚΄ λ―Όμžλ„λ‘œ 평가 뢄석 γ€€β…’. 정책적 μ‹œμ‚¬μ  λ°κ°œμ„ λ°©μ•ˆ 【뢀 λ‘γ€‘μš°λŒ€κ°€μ κ³Ό κ²½μŸλ„ λΆ„

    A Study on the Improvement of Safety Management System in Korean Container Ports

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    λ³Έ μ—°κ΅¬λŠ” μš°λ¦¬λ‚˜λΌ μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μ•ˆμ „κ΄€λ¦¬μ œλ„μ— κ΄€ν•œ 효과적인 κ°œμ„  λ°©μ•ˆμ„ μ œμ‹œν•˜μ—¬ μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ λ‚΄ μž‘μ—…μžκ°€ 보닀 μ•ˆμ „ν•œ ν™˜κ²½μ—μ„œ μž‘μ—…ν•  수 μžˆλŠ” 여건을 μ‘°μ„±ν•˜μ—¬ 뢀산항이 선진 μ•ˆμ „ν•­λ§ŒμœΌλ‘œ λ„μ•½ν•˜κΈ° μœ„ν•œ λ‹¨μ΄ˆλ₯Ό μ œκ³΅ν•˜λŠ”λ° κ·Έ λͺ©μ μ΄ μžˆλ‹€. λ³Έ μ—°κ΅¬μ˜ λͺ©μ μ„ λ‹¬μ„±ν•˜κΈ° μœ„ν•΄ μš°μ„  μ„ ν–‰μ—°κ΅¬μ—μ„œ μ§€μ ν•˜μ˜€λ˜ μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μ•ˆμ „μ— κ΄€ν•œ λ¬Έμ œμ λ“€μ„ 규λͺ…ν•˜κ³ , ν•΄μ™Έ μ„ μ§„ν•­λ§Œμ˜ 사둀듀과 λΉ„κ΅Β·λΆ„μ„ν•˜μ—¬ μ’€ 더 μ‹€νš¨μ„± μžˆλŠ” ν•΄κ²° λ°©μ•ˆλ“€μ„ κ³ μ°°ν–ˆλ‹€. κ·Έ κ²°κ³Ό μš°λ¦¬λ‚˜λΌμ˜ 경우, 효과적인 μž¬λ°œλ°©μ§€ λŒ€μ±…κ³Ό λŒ€μ•ˆ 마련의 κΈ°μ΄ˆκ°€ λ˜λŠ” μž¬ν•΄ 톡계 μˆ˜μ§‘μ—μ„œλΆ€ν„° λ§Žμ€ 문제점이 μžˆμ—ˆμœΌλ©°, 관련법과 μ œλ„ λ“±μ˜ λ―ΈλΉ„λ‘œ μš΄μ˜νšŒμ‚¬μ™€ μ •λΆ€κΈ°κ΄€μ—μ„œλŠ” 체계적인 ν•­λ§Œ μ•ˆμ „κ΄€λ¦¬ 쑰직과 μ‹œμŠ€ν…œμ„ 갖좔지 λͺ»ν•˜κ³  μžˆλŠ” κ²ƒμœΌλ‘œ λ‚˜νƒ€λ‚˜ 이에 λŒ€ν•œ κ°œμ„ μ΄ ν•„μš”ν•œ κ²ƒμœΌλ‘œ 보인닀. μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ λ‚΄ μ‚¬κ³ μ›μΈμ˜ λŒ€λΆ€λΆ„μ€ μž‘μ—…μžμ˜ μ•ˆμ „ 뢈감증으둜 인해 λ°œμƒλœλ‹€. ν•˜μ§€λ§Œ μ΄μ œλŠ” μ΄λŸ¬ν•œ μ•ˆμ „μ˜μ‹ λΆ€μ‘±μ΄λΌλŠ” 결둠만 λ‚΄κ³  κ·ΈμΉ  것이 μ•„λ‹ˆλΌ μž‘μ—…μžμ˜ μ•ˆμ „μ˜μ‹μ΄ μž₯기적이고 μ§€μ†μ μœΌλ‘œ ν˜„μž₯에 μž‘μš©ν•˜κΈ° νž˜λ“  μš”μΈλ“€μ—λŠ” μ–΄λ– ν•œ 것이 μžˆλŠ”μ§€ μ‚΄νŽ΄λ³΄κ³  이λ₯Ό μ œμ–΄ν•  수 μžˆλŠ” κ°•λ ₯ν•œ λ²•Β·μ œλ„ 등을 λ³΄μ™„ν•œ λ‹€μŒ, κ·Έ ν‹€ μ•ˆμ—μ„œ 쑰직적이고 체계적인 예방 ν™œλ™λ“€μ΄ 이루어져야 ν•  ν•„μš”μ„±μ΄ μžˆλ‹€.|This study has a purpose for providing the beginning in order for Busan port to take a leap as an advanced safe harbor, and setting the conditions in order for the workers in container terminal to work in a safer environment than ever, by suggesting effective improvement plans about the safety management system of the container terminal in South Korea. So as to accomplish the purpose of this study, we have examined more effective solution plans by comparing and analyzing the safety cases of overseas advanced port, with the indicated reasons in the previous study of the past why the container terminal safety problems wouldn't still improve. First of all, in case of South Korea, there are lots of problems in the collection of disaster statistics, which is the basis of effective measures to prevent recurrence and the alternative plans. Therefore, improvements are needed, because the operating companies and government agencies are not equipped with the systematic port safety management organizations and systems, due to lack of related laws and regulations. Most causes of accidents in container terminals are owing to the safety insensitivity of Worker, But now it is expected that the organized and systematic accident prevention activities should be carried out, after examining what factors hinder the long-term and continuous safety consciousness in the container terminal, and remedying the laws and regulations which could control those factors.제1μž₯ μ„œ λ‘  1 제1절 μ—°κ΅¬μ˜ λ°°κ²½κ³Ό λͺ©μ  1 제2절 μ—°κ΅¬μ˜ 방법 및 ꡬ성 2 제2μž₯ ν•­λ§Œν•˜μ—­ μ•ˆμ „μ‚¬κ³  ν˜„ν™© 뢄석 3 제1절 κ΅­λ‚΄ ν•­λ§Œν•˜μ—­ μ•ˆμ „μ‚¬κ³  μ‹€νƒœ 뢄석 3 1. κ΅­λ‚΄ ν•­λ§Œν•˜μ—­ μž¬ν•΄ν†΅κ³„ 뢄석 3 2. κ΅­λ‚΄ ν•­λ§Œν•˜μ—­ μž¬ν•΄μ‚¬κ³  ν˜„ν™© 5 제2절 μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μœ ν•΄Β·μœ„ν—˜ μš”μΈ 뢄석 14 1. μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ ν•˜μ—­μž‘μ—…μ˜ νŠΉμ„± 14 2. μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μž‘μ—… νŠΉμ„±μ— λ”°λ₯Έ μœ ν•΄Β·μœ„ν—˜ ν™˜κ²½ 18 제3μž₯ 이둠적 κ³ μ°° 23 제1절 선행연ꡬ 23 제2절 κ΅­λ‚΄μ™Έ μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μ•ˆμ „κ΄€λ¦¬μ œλ„ 25 1. κ΅­λ‚΄ μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μ•ˆμ „κ΄€λ¦¬μ œλ„ 25 2. ν•΄μ™Έ μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μ•ˆμ „κ΄€λ¦¬μ œλ„ 29 제3절 κ΅­λ‚΄ μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μ•ˆμ „κ΄€λ¦¬μ˜ 문제점과 μ‹œμ‚¬μ  45 1. ν™˜κ²½μ μΈ μΈ‘λ©΄ 45 2. λ²•β€€μ œλ„μ μΈ μΈ‘λ©΄ 47 3. 쑰직적인 μΈ‘λ©΄ 52 4. μ†Œκ²° 및 μ‹œμ‚¬μ  53 제4μž₯ μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μ•ˆμ „κ΄€λ¦¬ λ²•β€€μ œλ„ κ°œμ„ λ°©μ•ˆ 55 제1절 μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μ•ˆμ „κ΄€λ¦¬ 법λ₯  검토와 κ°œμ„ μ•ˆ 55 1. ν•œκ΅­ν‘œμ€€μ‚°μ—…λΆ„λ₯˜ κ°œμ •μ•ˆ 55 2. μ‚°μ—…μ•ˆμ „λ³΄κ±΄λ²• μ‹œν–‰λ Ή(제12μ‘° β‘ ν•­ λ³„ν‘œ3) κ°œμ •μ•ˆ 57 3. κΈ°μ—…ν™œλ™κ·œμ œμ™„ν™”μ—κ΄€ν•œ νŠΉλ³„μ‘°μΉ˜λ²•(제29μ‘°,제40μ‘°)κ°œμ •μ•ˆ 58 4. ν•­λ§Œλ²• μ‹œν–‰λ Ή(λ³„ν‘œ 4) κ°œμ •μ•ˆ 59 5. μ‚°μ—…μ•ˆμ „λ³΄κ±΄κΈ°μ€€μ— κ΄€ν•œ κ·œμΉ™(제40μ‘°) κ°œμ •μ•ˆ 62 제2절 μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μ•ˆμ „κ΄€λ¦¬ μ œλ„ κ°œμ„ μ•ˆ 63 1. μ»¨ν…Œμ΄λ„ˆν„°λ―Έλ„ μ•ˆμ „κ΄€λ¦¬λ₯Ό μœ„ν•œ 톡합적인 ν˜‘λ ₯체계 ꡬ성 63 2. 톡합적인 μ•ˆμ „κ·œμ • 및 지침 μ œμ • 64 3. λ³Έμ„  λ‚΄ μž‘μ—…ν™˜κ²½ κ°œμ„ μ„ μœ„ν•œ PSC, FSC 점검 κ°•ν™” 70 4. ν•­λ§Œ λ‚΄ μ•ˆμ „κ·œμ • μœ„λ°˜μžμ— λŒ€ν•œ 제재쑰치 κ°•ν™” 71 5. 3rd Party μž‘μ—…μž 개인승용차 이용 μ œν•œ 71 6. ν™”λ¬Όμ°¨λŸ‰ 기사와 μž„μ‹œ μΆœμž…μžμ— λŒ€ν•œ μ•ˆμ „κ΅μœ‘ μ˜λ¬΄ν™” 72 7. 도급직 Y/T μš΄μ „μ›μ— λŒ€ν•œ μ•ˆμ „κ΄€λ¦¬ λ°©μ•ˆ 마련 73 제5μž₯ κ²° λ‘  74 제1절 μ—°κ΅¬κ²°κ³Όμ˜ μš”μ•½ 및 μ‹œμ‚¬μ  74 제2절 μ—°κ΅¬μ˜ ν•œκ³„μ κ³Ό 과제 76 μ°Έκ³  λ¬Έν—Œ 77 κ΅­λ‚΄ λ¬Έν—Œ; 77 ν•΄μ™Έ λ¬Έν—Œ; 79 [λΆ€ 둝] 80Maste

    λ„€νŠΈμ›Œν¬ 기반 ν˜‘μ—… 섀계 μ‹œμŠ€ν…œ ꡬ좕을 μœ„ν•œ Java 3D λͺ¨λΈλ§ 데이터 뷰어에 κ΄€ν•œ 연ꡬ

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    This study is on the development of the modeling viewer for the collaborating design on networking environments using java 3d. Many years ago, most of designer had to plan with the drafting tools like compass, ruler and calculator for product design. But after adding the computer system, the design project by CAD system has been the standard in industrial works. At this time, CAD includes 2D drafting, 3D modeling and visualized simulation for the engineering. And in the future and now, for knowledge based information system are including. In this study for the developing the modeling viewer in collaborating design, the first module to reading CAD model file, the second to managing the read data in DB, and the third to exchanging of data are programmed using java 3d in client-server networking. With these module, the basic step to constructing collaborating design system is applying.λͺ©μ°¨ Abstract = iii ν‘œ λͺ©μ°¨ = v κ·Έλ¦Ό λͺ©μ°¨ = v 제1μž₯ μ„œλ‘  = 1 1.1 μ—°κ΅¬μ˜ ν•„μš”μ„± 및 λ°°κ²½ = 1 1.2 μ—°κ΅¬λ‚΄μš© = 2 제2μž₯ μ‹œμŠ€ν…œ ꡬ성 및 연ꡬ λ‚΄μš© = 3 2.1 μ‹œμŠ€ν…œ κ°œμš” = 3 2.2 μ—°κ΅¬λ‚΄μš© = 5 2.2.1. μ‹œμŠ€ν…œμ˜ ꡬ좕 = 5 2.2.1.1 μ‹œμŠ€ν…œ μ‹€ν–‰ ν™˜κ²½ = 5 2.2.1.2 μ‹€μ‹œκ°„ μ‹œκ°ν™” λͺ¨λ“ˆ = 6 2.2.1.3 Java 3D의 μž₯점 = 7 2.3 Java 3Dμ—μ„œ μ§€μ›ν•˜λŠ” OBJ νŒŒμΌμ„ μ΄μš©ν•œ λ‘œλ” = 8 2.3.1 OBJ 파일의 뢄석 = 9 2.3.2 λ‘œλ” νŒ¨ν‚€μ§€ μΈν„°νŽ˜μ΄μŠ€μ™€ κΈ°λ³Έ 클래슀 = 11 2.4 Java3Dμ—μ„œ μ§€μ›ν•˜μ§€ μ•ŠλŠ” ASE νŒŒμΌμ„ μ΄μš©ν•œ λ‘œλ” κ΅¬ν˜„ = 11 2.4.1 ASE 파일의 λ‚΄μš©λ³΄κΈ° = 12 2.4.2 ASE νŒŒμΌλΆ„μ„ν•˜κΈ° = 13 2.4.3 λ…Έλ“œμ •λ³΄ 읽기 = 14 2.4.4 λ°”μ΄λ„ˆλ¦¬ λ³€ν™˜ = 16 2.4.5 λ©”λͺ¨λ¦¬ λ‘œλ“œ = 16 2.4.6 λ°”μ΄λ„ˆλ¦¬ 파일 디코더 = 18 2.4.7 λ·°μ–΄λ‘œμ˜ λ Œλ”λ§ = 20 2.4.8 JNIλ₯Ό μ΄μš©ν•œ Java 3D둜의 호좜 = 23 2.5 μ‚¬μš©μž μž‘λ™ λͺ¨λ“ˆ = 23 2.6 μ—”μ§€λ‹ˆμ–΄λ§ λ°μ΄ν„°λ² μ΄μŠ€ κ΅¬ν˜„ = 29 2.6.1 μ—”μ§€λ‹ˆμ–΄λ§ λ°μ΄ν„°λ² μ΄μŠ€ μ‹œμŠ€ν…œμ˜ μ’…λ₯˜μ™€ νŠΉμ§• = 30 2.6.2 μ—”μ§€λ‹ˆμ–΄λ§ λ°μ΄ν„°λ² μ΄μŠ€κ°œοΌŸεƒοΌŸ 기법과 도ꡬ = 31 2.6.3 μ—”μ§€λ‹ˆμ–΄λ§ λ°μ΄ν„°λ² μ΄μŠ€ κ³„νšμ˜ 단계 = 31 2.6.4 ν΄λž˜μŠ€λ³„ 속성 μ •μ˜ = 34 2.6.5 데이터 사전 ν•­λͺ© μž‘μ„± = 35 2.6.6 MySQLλ₯Ό μ΄μš©ν•œ μ‹œμŠ€ν…œ ꡬ성 = 35 2.7 2계측 λ°©μ‹μ˜ λ„€νŠΈμ›Œν¬λ₯Ό μ΄μš©ν•œ 연동 = 36 2.7.1 JDBC = 37 2.7.2 RMI = 38 2.7.3 λ„€νŠΈμ›Œν¬ 기반 μ—”μ§€λ‹ˆμ–΄λ§ λ°μ΄ν„°λ² μ΄μŠ€ μ‹œμŠ€ν…œμ˜ κ΅¬ν˜„ = 39 제3μž₯ κ²°λ‘  = 42 μ°Έκ³  λ¬Έ

    Statistical Characterization of UWB channel in Office Environments

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    λ³Έ λ…Όλ¬Έμ—λŠ” μ΄ˆκ΄‘λŒ€μ—­ ν†΅μ‹ μ‹œμŠ€ν…œμ„ μœ„ν•œ 주파수 μ˜μ—­μ˜ 톡계학적 채널 λͺ¨λΈμ„ μ„œμˆ ν•˜κ³  μžˆλ‹€. 채널 λͺ¨λΈλ§μ€ 3개의 사무싀 ν™˜κ²½, 46개의 솑, μˆ˜μ‹  μœ„μΉ˜μ—μ„œ 얻어진 23,000개의 μ±„λ„μ‘λ‹΅ν•¨μˆ˜λ‘œ λΆ€ν„° μ–»μ–΄μ‘Œλ‹€. μΈ‘μ •μ‹€ν—˜μ„ 톡해 얻어진 데이터λ₯Ό λ°”νƒ•μœΌλ‘œ 주파수 변화에 λ”°λ₯Έ κ²½λ‘œκ°μ‡„μ§€μˆ˜ 변화에 λŒ€ν•΄ μ„œμˆ ν•œ ν›„ μ „νŒŒν™˜κ²½κ³Ό κ°€μ‹œκ²½λ‘œμ˜ μ‘΄μž¬μ—¬λΆ€μ— λ”°λ₯Έ μˆ˜μ‹ μ‹ ν˜Έμ˜ ν™•λ₯ λΆ„포λͺ¨λΈμ„ μ—°κ΅¬ν•˜μ˜€λ‹€. λ§ˆμ§€λ§‰μœΌλ‘œλŠ” μˆ˜μ‹ λœ 주파수 톀에 ν•΄λ‹Ήν•˜λŠ” μˆ˜μ‹ νŒŒμ›Œμ˜ ν‘œμ€€νŽΈμ°¨μ™€ 같은 톡계적 νŠΉμ„±λ“€μ„ κ³ μ°°ν•˜μ˜€λŠ”λ°, κ°€μ‹œκ²½λ‘œκ°€ μ‘΄μž¬ν•˜λŠ” κ²½μš°μ—λŠ” 솑, μˆ˜μ‹ κΈ° μ‚¬μ΄μ˜ 거리가 λ©€μ–΄μ§€λ©΄μ„œ ν‘œμ€€νŽΈμ°¨ 값이 컀지고 그에 따라 μˆ˜μ‹  주파수 ν†€μ˜ νŒŒμ›Œκ°€ 평균 μˆ˜μ‹ νŒŒμ›Œμ—μ„œ μΌμ •ν•œ λ²”μœ„ μ•ˆμ— λ“€μ–΄μ˜¬ ν™•λ₯ μ΄ λ–¨μ–΄μ§€λŠ” 것을 μ•Œ 수 μžˆμ—ˆλ‹€.이 논문은 λ‘λ‡Œν•œκ΅­ 21 사업과 λŒ€ν•™ IT 연ꡬ센터 사업(ITRC)의 μ§€μ›μœΌλ‘œ μˆ˜ν–‰λ˜μ—ˆλ‹€
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