• Asia Marketing Journal
• /
• v.8 no.3
• /
• pp.1-11
• /
• 2006

The Bass model assumes two communication channels: mass-media and word-of-mouth. In this paper, we call the mass-media Type I channel of communications. The word-of-mouth channel means interaction between non-adopters and adopters. Let us call it Type II channel of communications. In the real world, however, the non-adopters who are not aware of the innovation can be affected by communications with other non-adopters who are aware of it. Let us call it Type III channel of communications to differentiate with Type II channel. This paper analyzes the impact of Type III channel on diffusion process. The result shows that exponential growth patterns (for example, the adoption patterns of the blockbuster movies) can be observed when non-adopters are influenced by other non-adopters who aware of the innovation.

• Journal of Distribution Research
• /
• v.8 no.2
• /
• pp.67-84
• /
• 2003

This study suggests new perspective of interorganizational communication. The importance of communication quality is increasing because it affects performance of marketing channels. In perspective of information exchange, communication quality consists of accuracy, availability, timing, and credibility. In research model, the antecedents of communication quality adopt willingness of information sharing and capability of efficient communication. To examine effects of communication quality on channel performance, research model includes relation of communication quality and conflicts. For empirical test, relation of PC makers and their dealers is decided as a focal dyad. Findings indicate that overall hypotheses are supported except the relation of willingness of information sharing and communication quality.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.21 no.2
• /
• pp.281-287
• /
• 1997

In the conventional inverse modeling method for on-line modeling of the secondary path transfer function, the signal to noise ratio between the arbitrary random signal and the plant noise have to keep at -10 - -20 dB. For these reasons, the modeling can't be exactly implemented by the conventional method alone and the convergence time for modeling becomes too long. In this study, by combining the conventional inverse modeling method with an adaptive line enhancer, or with an adaptive noise canceller, a rigorous transfer functions of secondary path modeling and the control of a primary noise have been implemented simultaneously.

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.1 no.1
• /
• pp.52-57
• /
• 2002

A simulation tool for an optimal ATIS design and drivers' dynamic route choice behavior analysis is developed, which is applicable to urban networks. Due to the difficulty to make drivers feel the time pressure according to traffic conditions, current SP questionnaire survey type surveys have a limitation to capture correct driver reactions to real-time traffic Information provision. The simulator Is a web-based upgraded version, named WATiSim (Web-based ATIS Simulator), to quickly perform a wide population survey with a minimal cost using INTERNET Furthermore, the time pressure issue is lessened by its interface and simulation modules. After WATiSim mimicked a VMS based ATIS in a partial network of Seoul Metropolitan, reactions of drivers to various traffic conditions were surveyed through INTERNET and analyzed using a logit model. Drivers under the ATIS environment clearly understood the provided traffic information, and their reactions were closely related to traffic conditions, scheduled delay, trip purposes as well as toll charge if any.

• Korean Chemical Engineering Research
• /
• v.59 no.3
• /
• pp.366-372
• /
• 2021

Cadherin-Catenin complex is thought to play an essential role in the transmission of force at adherens junction. Due to the lack of proper tools to visualize and detect mechanical force signals, the underlying mechanism by which the cadherin-catenin complex regulates force transmission at intercellular junctions remains elusive. In this study, we visualize cadherin-mediated force transmission using an engineered α-Catenin sensor based on fluorescence resonance energy transfer. Our results reveal that α-catenin is a key force transducer in cadherin-mediated mechanotransduction at cell-cell junctions. Thus, our finding will provide important insights for studying the effects of chemical and physical signals on cell-cell communication and the relationship between physiological and pathological phenomena.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.36 no.2
• /
• pp.105-112
• /
• 2018

To determine the position of receiver, the GPS (Global Positioning System) uses position information of satellites and pseudo ranges based on signals. These are reflected by surrounding structures and multipath errors occur. This paper proposes a method for multipath error reduction using digital images to enhance the accuracy. The goal of the study is to calculate the shielding environment of receiver using image processing and apply it to GPS positioning. The proposed method, firstly, performs a preprocessing to reduce the effect of noise on images. Next, it uses hough transform to detect the outline of building roofs and determines mask angles and permissible azimuth range. Then, it classifies the satellites according to the condition using the image processing results. Finally, base on point positioning, it computes the receiver position by applying a weight model that assigns different weights to the classified satellites. We confirmed that the RMSE (Root Mean Square Error) was reduced by 2.29m in the horizontal direction and by 15.62m in the vertical direction. This paper showed the potential for the hybrid of GPS positioning and image processing technology.

• Journal of the Korean Academy of Esthetic Dentistry
• /
• v.30 no.2
• /
• pp.71-90
• /
• 2021

The virtual patient dataset is a collection of diagnostic data from various sources acquired from a single patient into a coordinate system of three-dimensional visualization. Virtual patient dataset makes it possible to establish a treatment plan, simulate various treatment procedures, and create a treatment planning delivery device. Clinicians can design and simulate a patient's smile on the virtual patient dataset and select the optimal result from the diagnostic process. The selected treatment plan can be delivered identically to the patient using manufacturing techniques such as 3D printing, milling, and injection molding. The delivery of this treatment plan can be linked to the final prosthesis through mockup confirmation through provisional restoration fabrication and delivery in the patient's mouth. In this way, if the diagnostic data superimposition and processing accuracy during the manufacturing process are guaranteed, 3D digital smile design simulated in 3D visualization can be accurately delivered to the real patient. As a clinical application method of the virtual patient dataset, we suggest a decision-making method that can exclude occlusal adjustment treatment from the treatment plan through the digital occlusal pressure analysis. A comparative analysis of whole-body scans before and after temporomandibular joint treatment was suggested for adolescent idiopathic scoliosis patients with temporomandibular joint disease. Occlusal plane and smile aesthetic analysis based on the virtual patient dataset was presented when treating patients with complete dentures.

• Journal of Distribution Research
• /
• v.9 no.1
• /
• pp.93-110
• /
• 2004

One of the most important things in channel of distribution is the management of intrachannel conflict. In this study, 1 tried to find out the major sources of conflict among distribution channel members of gasolin industry and home electronics industry which have two types of distribution channels - sales branch and agency. I also investigated how the level of conflict influences the business performance of the channel member. The results of the study showed that the imbalance of power, nonfulfillment of roles by manufacturers, nonfulfillment of roles by dealer, divergence in perceptions, intrachannel communication problem have positive relation but role clarity has negative relation with conflict. The results also indicate that the more power supplier exerts upon dealer, the less supplier and dealer practice their roles, and the more communications problem there is, there will be more conflict between channel members. I also analyzed the relationship between conflict and business performance and the result came out as expected: the more conflict there is the less business performance. Some difference was found between sales branch and agency on that aspect. Managerial implications and limitations of the study were also discussed.

• Proceedings of the Korean Association for Survey Research Conference
• /
• 2001.06a
• /
• pp.95-108
• /
• 2001

One of the most important things in channel of distribution is the management of intrachannel conflict. In this study, I tried to find out the major sources of conflict among distribution channel members of petroleum industry and home electronic industry which have two types of distribution channels - sales branch and agency, and also investigate how the level of conflict influence the business performance. The results of the study showed that the imbalance of power, nonfulfillment of roles by manufacturers, nonfulfillment of roles by dealer, divergence in perceptions, intrachannel communication noise have positive relation but role clarity has negative relation with conflict. The results indicate that the more power manufacturer exerts upon dealer, the less manufacturer and dealer practice their roles, and the more communications noise there is, there will be more conflict between channel members. I also analyzed the relationship between conflict and business performance and the result came out as expected, the more conflict there is the less business performance. Little difference was found in sales branch and agency on that aspect.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.25 no.3
• /
• pp.231-238
• /
• 2007

This paper describes the availability of the forthcoming integrated GNSS(Global Navigation Positioning System) positioning that includes GPS(Global Positioning System), Galileo, and QZSS(Quasi-Zenith Satellites System). We built a signal propagation model that identifies direct, multipath, and diffraction signals, using the principles of specular reflection and ray tracing technique. The signal propagation model was combined with 3D GIS(three-dimensional geographic information system) in order to measure the satellite visibility and positioning error factors, such as the number of visible satellites, average elevation of visible satellites, optimized DOP(dilution of position) values, and the portion of multipath-producing satellites. Since Galileo and QZSS will not be fully operational until 2010, we used a simulation in comparing GPS and GNSS positioning for a $1km{\times}1km$ developed area in Shinjuku, Tokyo. To account for local terrain variation. we divided the target area into 40,000 $5m{\times}5m$ grid cells. The number of visible satellites and that of multipath-free satellites will be greatly increased in the integrated GNSS environment while the average elevation of visible satellites will be higher in the GPS positioning. Much decreased PDOP(position dilution of precision) values indicate the appropriate satellite/user geometry of the integrated GNSS; however, in dense urban areas, multipath mitigation will be more important than the satellite/user geometry. Thus, the efforts for applying current technologies of multipath mitigation to the future GNSS environment will be necessary.