• 제목/요약/키워드: carrier model

검색결과 747건 처리시간 0.045초

국제항공화물운송계약(國際航空貨物運送契約)의 법률관계(法律關係) -화주(貨主)의 권리의무(權利義務)를 중심(中心)으로- (Legal Relations of the Contract of International Carriage of Goods by Air)

  • 이강빈
    • 항공우주정책ㆍ법학회지
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    • 제1권
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    • pp.193-222
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    • 1989
  • The purpose of this study is to review the rights and duties of cargo owners, the party to the contract of international carriage of goods by air under the Warsaw Convention System and the IATA conditions. It is generally known that air freight is the most-cost mode of transportation. However, should there be considerations of total distribution cost, the use of air freight leads exporters to be advantageous in physical distribution. The Warsaw Convention System defined and limited the rights and duties of cargo owners and air carriers paticipating in the international carriage of goods, but it does not regulate every aspect of air transportation. Therefore, the unregulated parts are governed by national laws and by individual contracts of carriage. The International Air Transport Association(lATA), a worldwide organization of airlines, has formulated model conditions of contract for the carriage of cargo. These models are not uniformly followed but they serve as a basis for many of the individual standard form of contracts prepared by air carriers. The contract of air carriage of goods is a contract of adhesion, 'the consignor recognizing and accepting the conditions laid down by the carrier'. There are consignors and carriers as the parties to the contract of international carriage of goods. In addition to his basic right, implied in Warsaw Convention Article 18 and 19, to require devery of the goods in good condition and at the date agreed upon, the consignor has the right to dispose the goods in the course of the journey up to the moment when the consignee is entitled to require delivery. If it is impossible to carry out the orders of the consignor, the carrier must so inform him forthwith. The right conferred on the consignor ceases at the moment when that of the consignee begins in accordance with Warsaw Convention Article 13. Nevertheless, if the consignee declines to accept the air waybill or the goods, or if he cannot be communicated with, the consignor resumes his right of disposition. Unless it is otherwise agreed, it is the duty of the carrier to give notice to the consignee as soon as the goods arrive. The consignee is entitled, on arrival of the goods at the place of destination, to require the carrier to hand over to him the air waybill and to deliver the goods to him, on payment of the charges due and on complying with the conditions of carriage set out in the air waybill. The air waybill is supposed to be made out by the consignor. If the carrier makes it out, he is deemed, subject to proof to the contrary, to have done so on behalf of the consignor, whether there is one air waybill or several, each must be made out in three original parts. The first is for the carrier, the second is for the consignee, and the the third is handed to the consignor when the shipment has been accepted. The consignor is responsible for the correctness of the particulars and statement concerning the cargo appearing in the air waybill. Each of the original parts of the air waybill has evidential value and possession of his part is a condition for the exercise by the consignor or consignee of his rights under the contract of carriage. Hague Protocol set forth in Article 9 that nothing in this. Convention prevents the issue of a negotiable air waybill, but Montreal Additional Protocol No. 4 deleted this article. All charges applicable to a shipment are payable in cash at the time of acceptance thereof by the carrier in case of a prepaid shipment or at the time of delivery thereof by the carrier in case of a collect shipment. The carrier shall have lien the cargo for unpaid charges and, in the event of non-payment thereof, shall have the right to dispose of the cargo at public or private sale and pay itself out of the proceeds of such sale any and all such amounts. In conclusion, the Warsaw Convention System has the character of ambiguity in various respects, not only in the part of the forms of documents but also in conditions of contract. Accordingly, the following propositions might be considered: (1) If the carrier does not obey the orders of the consignor for the disposition of the goods without proper reasons, he will be liable strictly for any damage which may be caused thereby to the cargo owner. The special agreement and carrier's conditions of carriage which limit unreasonably the consignor's right of disposition of the goods will be nullified. (2) The instrument of the Warsaw Convention System which is not yet in force(Montreal Additional Protocol No. 4) would considerably simplfy the processing and keeping of computerized records of the carriage. Until this instrument enters into force, the airlines will be faced with practical problems preventing them to substitute computerized data processing techniques for the formal issuance of the documents. Accordingly, Montreal Additional Protocol No. 4 should become effective as soon as posisble. From a practical point of view in the international trade, the issuance of negotiable air waybill should be permitted for the security of the bank.

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RawPEACH: Multiband CSMA/CA-Based Cognitive Radio Networks

  • Chong, Jo-Woon;Sung, Young-Chul;Sung, Dan-Keun
    • Journal of Communications and Networks
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    • 제11권2호
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    • pp.175-186
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    • 2009
  • A new medium access control (MAC) scheme embedding physical channels into multiband carrier sense multiple access/collision avoidance (CSMA/CA) networks is proposed to provide strict quality of service (QoS) guarantee to high priority users. In the proposed scheme, two priority classes of users, primary and secondary users, are supported. For primary users physical channels are provided to ensure strict QoS, whereas secondary users are provided with best-effort service using CSMA/CA modified for multiband operation. The performance of the proposed MAC scheme is investigated using a new multiband CSMA/CA Markov chain model capturing the primary user activity and the operation of secondary users in multiple bands. The throughput of secondary users is obtained as a function of the primary user activity and other CSMA/CA parameters. It is shown that the new MAC scheme yields larger throughput than the conventional single-band CSMA/CA when both schemes use the same bandwidth.

가우시안 농도 분포를 갖는 PT-IGBT의 에미터 주입효율 (Emitter Injection Efficiency of Gaussian Impurity Distributions in PT-IGBT)

  • 김정희;최연익;정상구
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 추계학술대회 논문집 전기물성,응용부문
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    • pp.165-167
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    • 2001
  • Emitter injection efficiency of p+/n-buffer Junction with Gaussian impurity distribution is presented. This model takes into account the variation of the carrier lifetime with injection level which allows a unified interpretation of the injection efficiency for all injection level. The injected carrier density and injection efficiency of the anode are calculated as a function of the current density with the low level lifetime as a parameter for different thicknesses of the anode. The analytical results agree well with simulation.

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Epitaxial에 의한 Si epi층의 케리어 수명과 P-N접합의 이상전도현상 (Carrier Lfetime and Anormal Cnduction Penomena in Silicon Epitaxial Layer-substrate Junction)

  • 성영권;민남기;김승배
    • 전기의세계
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    • 제26권5호
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    • pp.83-89
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    • 1977
  • This paper described the minority carrier lifetime in Si epitaxial layer, and also the voltage (V) versus current (I) characteristics of high resistivity Si epitaxial layer0substrate junction. The measured lifetime in Si epi-layer was much shorter than in bulk, and the temperature dependence of lifetime was found to agree well with Shockley-Read model of recombination which applies to high resistivity n-type materials. The V-I curve showed; an ohmic region (I.var.V), a sublinear region (I.var.V$^{1}$2/), a space charge limited current region (I.var.V$^{2}$), and finally a negative resistance region. We investigated these phenomena by the theory of the relaxation semiconductor.

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자동차운반선의 선회성능에 미치는 풍하중의 영향에 관한 연구 (A Study on the Estimation of Wind Forces Influence upon the Turning Ability of a Car Carrier Ship)

  • 최명식;이경우;오양국
    • 한국항해학회지
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    • 제24권5호
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    • pp.397-403
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    • 2000
  • Since very large and high-speed ships have been appeared in marine transportation from 1970s, these ships with poor maneuverability have made large-scale accidents frequently all over the world. The IMO(International Maritime Organization) recommended that ship designers should evaluate various maneuvering performance at initial stage and serve them to ship operators when they deliver a new ship. Meantime, it is expected that ships with large and wide superstructure would have poor maneuverability when they are affected by strong wind. Therefore, car carrier ship with large superstructure was selected to confirm how the ship responds to the external wind forces in this paper. The lateral and transverse projected areas above the water level were considered and ship behaviors were checked by change of rudder angles under severe wind conditions of different directions. In addition, hydrodynamic derivatives and coefficients were predicted from ship particulars and numerical calculations were carried out with the mathematical model of low speed maneuvering motions.

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조파기에 의하여 발생된 선단파의 전개 (On the Evolution of Leading Waves Generated by a Wavemaker)

  • 박인규;최항순
    • 한국해안해양공학회지
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    • 제4권3호
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    • pp.156-160
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    • 1992
  • 2차원 수조에서 발생된 선단파의 전개를 고찰하였다. 선단파의 전개는 일반적으로 Schrodinger 방정식으로 표현될 수 있다. 특히 반송파(carrier wave)의 기울기가 커서 비선형성이 중요하게 되면 3차 Schrodinger 방정식이 적절한 수학모형이 될 수 있음을 밝혔다. 수치계산은 Crank-Nicolson 알고리즘을 사용하였고 실험치와 비교하였다. 훈치계산으로 선단파의 전개를 잘 예측할 수 있으며 선단파의 신관는 kh>1.36일 때 가파른 파에서 비선형성에 큰 영향을 받음을 밝혔다.

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Analysis on Core Loss of Brushless DC Motor Considering Pulse Width Modulation of Inverter

  • Kim, Ki-Chan
    • Journal of Electrical Engineering and Technology
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    • 제9권6호
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    • pp.1914-1920
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    • 2014
  • In this paper, characteristics of blushless direct current (BLDC) motor including core loss are analyzed considering pulse width modulation (PWM) of inverter. Input voltage of BLDC motor due to PWM is calculated considering duty ratio and carrier frequency of inverter in order to control torque or speed of BLDC motor. For the calculation of core loss, the input current with harmonics due to PWM voltage is calculated by using equivalent circuit model of BLDC motor according to switching pattern and carrier frequency. Next, core loss is analyzed by inputting the currents as a source of BLDC motor for FEM. Characteristics including core loss are compared with ones without PWM waveform according to reference speed.

포획준위 밀도 예정을 통한 열증착한 일산화규소 박막과 고주파 스퍽터링한 이산화규소 박막의 특성비교 (Comparison of Characteristics Between Thermal Evaporated SiO and rf Sputtered $SiO_2$ Thin Films by Trap Density Measurements)

  • 마대영;김기완
    • 대한전자공학회논문지
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    • 제24권4호
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    • pp.625-630
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    • 1987
  • Thermal evaporated SiO rf sputtered SiO2 thin films were most widely used to the gate oxide of TFTs. In this paper, the difference of trap density and distribution between SiO2 and SiO2 film were studied. TFTs using SiO and SiO2 thin film for the gate oxide were fabricated. The output characteirstics of TFTs and the time dpendencd of the leakage current were measured. Models of the carrier transport and carrier trapping in TFT were proposed. The trap density was obtained by substituting measured value for the equation derived from the proposed model. It was found that rf sputtered SiO2 had more traps at interface than thermal evaporated SiO.

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Software Designing Simulator for Controlling Multiple-Mechanism Carrier System

  • Nakamura, Kotaro;Kumagai, Koji;Sato, Seiji;Sato, Shoichi
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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    • pp.450-450
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    • 2000
  • This paper presents a software design simulation method for controlling multiple mechanism carrier system (MMCS), which is mainly used in a wrapping machine or a case packing machine. This method uses a mechanical tool-work interactive model proposed in this paper, in order to represent the interactive behaviors between some tools and a work driven by their tools, in which low effect states of a work are defined. Based on this method, a 3-D simulation system has been built. It consists of shape modeling of each device, behavior definitions of tools, and control logic using if-then expression. By applying it to a ase packing machine having about 30 mechanical devices and 100 inputs/outputs for control, the effectiveness of this method has been shown in general verification of control logic specification in an early software design phase and the possibility of smooth communication tool between mechanical and software designers.

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