• 정보관리학회지
• /
• 제13권1호
• /
• pp.103-117
• /
• 1996

본 연구는 온라인 목록의 접근점과 서지사항이 이용자의 재탐색 과정에 있어서 어떠한 영향을 미치는가를 조사하였다. 두 온라인 목록(노티스 시스템과 다이닉스 시스템)을 선정하고, 대학교 학부학생들을 대상으로 하여 재탐색 빈도와 형태를 파악하였다. 재탐색의 형태는 탐색어 변경, 접근점 변경, 그리고 탐색어와 접근점 변경으로 한정하였다. 연구 결과는 접근점과 서지사항이 이용자의 재탐색 빈도와 형태에 영향을 미치는 것으로 나타났다.

• 한국항해항만학회지
• /
• 제42권2호
• /
• pp.79-86
• /
• 2018

Common Maritime Data Structure (CMDS) is commonly used by shore and ship users in e-Navigation data domain. In the overarching of e-Navigation architecture, IHO uses S-1XX, a digital exchange standard for next-generation marine information, as data exchange standard. The current CMDS has the advantage of intuitively recognizing the overall structure of e-Navigation. However, it has disadvantage in that it does not allow stakeholders to easily understand benefits that e-Navigation can provide when implementing e-Navigation. In this study, the direction of improving existing system for effective e-Navigation implementation was proposed considering RCOs (Risk Control Options) with expected composition of ship/ shore/ communication system by sector.

• 재무관리논총
• /
• 제3권2호
• /
• pp.329-364
• /
• 1996

Writing naked put options is a strategy employed either as a speculation to capture premium income, or as a method of placing a limit order to buy the underlying at the strike price in return for premium received. Using a Monte Carlo simulation, twenty thousand equity prices are generated under known volatility and return parameters. A binomial tree is constructed using the same volatility and return parameters. Put options on these 'equities' are valued with the binomial methodology. The performance of various put writing strategies is evaluated on a risk-adjusted basis. Evidence presented suggests that the judicious use of put options may enhance returns during portfolio construction.

• 산업공학
• /
• 제13권2호
• /
• pp.281-287
• /
• 2000

We studied a model house system on cyberspace using JAVA and VRML in this paper. In the system, users can not only browse the model house using a web browser but also choose options that they want to install in the final house and the chosen options are combined with the figure of the model house on the terminal window in real time. In addition, the information of the chosen options are transferred to a database on a server machine at the construction company and the company can use the information for the customer management. The developed system can be used by a simple EC system since it includes duplex information paths.

• Industrial Engineering and Management Systems
• /
• 제12권2호
• /
• pp.85-94
• /
• 2013

This research investigates the supply chain contract between a distributor and a supplier in which the selling period is relatively short in comparison with long production lead time. At the first stage, supplier who is a Stackelberg leader offers the distributor a contract with a set of parameters, and subjected to those parameters, the distributor places the number of initial orders as well as options. In order to purchase the option, the distributor pays non-linear option premium price with respect to the number of purchased options. At the second stage, based on realized demand, the distributor has the right to exercise option as either put or call which is limited up to the number of purchased options. The wholesale price contract is used as a benchmarking contract. This research has confirmed that the supply chain contract with a non-linear option premium price can help to coordinate the supply chain.

• East Asian mathematical journal
• /
• 제35권1호
• /
• pp.59-66
• /
• 2019

In this paper we study implicit-explicit (IMEX) methods combined with a semi-Lagrangian scheme to evaluate the prices of fixed strike arithmetic Asian options under jump-diffusion models. An Asian option is described by a two-dimensional partial integro-differential equation (PIDE) that has no diffusion term in the arithmetic average direction. The IMEX methods with the semi-Lagrangian scheme to solve the PIDE are discretized along characteristic curves and performed without any fixed point iteration techniques at each time step. We implement numerical simulations for the prices of a European fixed strike arithmetic Asian put option under the Merton model to demonstrate the second-order convergence rate.

• 대한두개안면성형외과학회지
• /
• 제20권2호
• /
• pp.134-138
• /
• 2019

Colon interposition is commonly used for esophageal reconstruction in patients with a previous gastrectomy. However, when colon interposition fails and alternative reconstruction is required, there are few options for reconstructing the long segment from the esophagus to the stomach. Here, we report on cases of esophagogastric reconstruction with limited alternative options after the failure of transverse and left colon interposition. In these cases, reconstruction was performed using two different microvascular methods: double-pedicle jejunal free flap and supercharged ileocolic interposition graft.

• 자원ㆍ환경경제연구
• /
• 제27권4호
• /
• pp.639-666
• /
• 2018

This paper analyses the investment options of groundwater development project under water price uncertainty. The optimal investment threshold price which trigger the investment are calibrated base on monopolistic real options model. Stochastic dynamic model is set to reflect the uncertainty of water price which follows the GBM (Geometric Brownian Motion) process. Our finding from non-cooperative investment decision model is that uncertainty of water price could deter the groundwater investment by considering the existence of option values. For policy markers, it is easy to manage 'charges for utilization of groundwater' rather than 'performance guarantee ratio' when managing groundwater investment with pricing policy. And it is necessary to make comprehensive and well-designed policies considering the characteristics of regional groundwater reservoir and groundwater developers.

• Clinics in Shoulder and Elbow
• /
• 제24권2호
• /
• pp.114-121
• /
• 2021

Irreparable massive rotator cuff tears cause pain, loss of function, and a decrease in range of motion, which cause serious disturbances in daily life. Young patients, in particular, are active and have relatively high functional requirements, and their surgical options are limited. Superior capsular reconstruction (SCR) was first proposed for irreparable massive rotator cuff tears, good clinical results have been reported in short-term follow up. Since then, SCR has been used increasingly worldwide for irreparable massive rotator cuff tears, and various studies have been published on clinical outcomes, biomechanical outcomes, surgical techniques, and graft types. This article reviews the optimal graft and surgical options for improving clinical outcomes in SCR.

• Archives of Plastic Surgery
• /
• 제48권2호
• /
• pp.149-157
• /
• 2021

Scars vary from mature linear scars to abnormal excessive scars such as hypertrophic scars and keloid scars. Keloid scars are fibro-proliferative disease entities that reflect an abnormal process of wound healing. They can cause pain, itching, stiffness, and psychological distress, all of which can affect quality of life. Various treatment options have been advocated as ways to prevent and treat keloid scars. These include noninvasive treatments such as use of silicone gel sheeting and compression therapy, and invasive treatments such as intralesional corticosteroid injections, surgery, and radiotherapy. Novel treatments include chemotherapy, immunotherapy, and anti-inflammatory therapies. Unfortunately, keloids continue to pose a significant challenge due to the lack of efficacious treatments. Therefore, clinicians should be familiar with various therapeutic options and apply the most suitable treatment plan for patients. In this review, we introduce the current therapeutic options for the management of keloid scars.