• Proceedings of the Safety Management and Science Conference
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• 2004.11a
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• pp.153-164
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• 2004

The growing importance of product quality is becoming more and more daily apparent as we enter the age of globalization around the world. And the product safety is getting more focus as well as product quality. As a result, many domestic companies are putting a lot of emphasis on safety measures and management activities and these companies' products are mainly superior to other companies' product. When we separate the product quality procedure into 3 steps, i.e. quality secure-quality confirm-quality guarantee, of course the 1st step is the most important, but also 2nd step of product quality confirm process is important. And in mass production environment, sampling inspection is more desirable than the $100\;\%$ inspection procedure. As a part of globalization trend, KS system is also being revised and reestablished based on ISO, IEC, etc. which are based on international standard. Conventional KS sampling inspection standards were in many areas quite different from ISO sampling standards, only KS A 3102, 3104, 3151 are left and the rest become obsolete, and even the ones that are still around are planned to the gone step by step. It has been already 3 years since the new KS A ISO $2859-0\sim3$ sampling inspection process has been established which the abolition of the popular KS A 3101, KS A 3105, KS A 3109, yet the implementation rate is very slow. This study will attempt to analyze the new KS A ISO 2859-2 and KS A ISO 2859-3, and try to understand the difference as that the new standard can be easily understood and used widely among companies, by using examples. Our attempt is to help implement with the companies with active safety involvement but the final result can be spread among other companies as well in the near future.

• The Journal of Korean Philosophical History
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• no.37
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• pp.71-96
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• 2013

This research is a discussion in critical viewpoint about Han WonJin's philosophical thoughts. As everyone knows, Han WonJin emphasizes the difference of nature between human and animal, so as to try to be hardened human-being's dignity and value. But, his theoretical system can't back that purpose. First, he focused on the real world and maintains "GiseonLihoo[氣先理後]". It means that the ontological sense of Li can be unmake by Gi, then Li can't be the ultimate basis of everything under the sun and pure good moral principle. This concept is perfectly realized in the theory of Mind-Nature, the realistic nature of everything under the sun is a thing that Li had been unmade by Gi, also formed in mixing with disposition. The practical and concrete Mind only has a cognitive function which had already been decided it's superiority. How can we practice moral behavior, can secure human-being's value and dignity in being based on these Mind-Nature?

• Journal of the Korea Institute of Information Security & Cryptology
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• v.30 no.6
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• pp.975-980
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• 2020

To protect wireless sensor networks (WSNs), various key distribution and management schemes have been proposed. However, most of them conducted simulations and experiments for performance evaluation by considering only the two-dimensional (2D) environments. In this paper, we investigate the effect of real-world three-dimensional (3D) topographic features on the key pre-distribution schemes for WSNs. For this purpose, we analyze and compare the performance of three pairwise key pre-distribution schemes in 2D and 3D environments: full pairwise (FP), random pairwise (RP), and full and random pairwise (FRP) schemes. For the experiments, we employ a network simulator NS-3 and 3D graphic tools such as Blender and Unity. As a result, we confirm that there was a difference in the performance of each scheme according to the actual 3D terrain and that the location-based FRP that considers deployment errors, has the highest efficiency in many aspects.

• Journal of Venture Innovation
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• v.3 no.2
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• pp.177-195
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• 2020

This paper discusses the reasons why a disparity in commitment to charitable giving exists between two regions : the East and the West. In explaining the regional difference, this paper particularly focuses on the social, economic, and political factors forming the trend?for instance, Asians' deep-rooted distrust in charity foundations and the lack of government policies incentivizing philanthropic giving in Asia. After analyzing why and how significantly Asia lags behind in charity compared to other parts of the globe, the paper proves that "creative destruction" is needed in the Asian philanthropy market. Additionally, this paper shows that it is an opportune time for an innovative start-up to introduce a new form of technology, an easy-to-access application with registered partnership foundations, thereby introducing creative destruction in the culture of charity in Asia. This paper finally examines the obstacles this start-up may face as it tries to grow into a monopoly and the socio-political implications it may bring to the world.

• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.30-32
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• 2004

With 3-D vision measuring, camera calibration is necessary to calculate parameters accurately. Camera calibration was developed widely in two categories. The first establishes reference points in space, and the second uses a grid type frame and statistical method. But, the former has difficulty to setup reference points and the latter has low accuracy. In this paper we present an algorithm for camera calibration using perspective ratio of the grid type frame with different line widths. It can easily estimate camera calibration parameters such as lens distortion, focal length, scale factor, pose, orientations, and distance. The advantage of this algorithm is that it can estimate the distance of the object. Also, the proposed camera calibration method is possible estimate distance in dynamic environment such as autonomous navigation. To validate proposed method, we set up the experiments with a frame on rotator at a distance of 1, 2, 3, 4[m] from camera and rotate the frame from -60 to 60 degrees. Both computer simulation and real data have been used to test the proposed method and very good results have been obtained. We have investigated the distance error affected by scale factor or different line widths and experimentally found an average scale factor that includes the least distance error with each image. The average scale factor tends to fluctuate with small variation and makes distance error decrease. Compared with classical methods that use stereo camera or two or three orthogonal planes, the proposed method is easy to use and flexible. It advances camera calibration one more step from static environments to real world such as autonomous land vehicle use.

• Journal of Korea Society of Industrial Information Systems
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• v.25 no.1
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• pp.31-40
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• 2020

In this study, we developed an algorithm for automatic travel itinerary planning based on expert recommendation. The proposed algorithm generates an itinerary by patterning a number of travel routes based on the automatic itinerary generation method based on the routes recommended by travel experts. To evaluate the proposed algorithm, we generated 30 itinerary for Singapore, Bankok, and Da Nang using both algorithms and analyzed the mean difference of trip distances with t-test and interater reliability of those itineraries. The result shows that the itineraries based on the proposed algorithm is not different from that of VRP(Vehicle routing problem) algorithm and interater reliability is high enough to show that the proposed algorithm is effective enough for real-world usage.

• Journal of Arbitration Studies
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• v.18 no.1
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• pp.49-69
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• 2008

This study is to analyze the case law on the disputes of the ex-im contract of steel bar from Yugoslav to Egypt, for which awards were made by the ICC Arbitration Court, trying to find out the characteristic approach of the tribunal toward arbitration case dealing with socialistic country, Yugoslav and Islamic Egypt. An Egyptian importer and an Yugoslavian Exporter concluded a contract, with an option to purchase an additional quantity. for the steel bar. The importer exercised this option as provided in the contract. But the exporter refused to honor the option, due to the fact that the world market price for the steel bar has gone up. As a result, the importer had to purchase the steel bar as a replacement from a Rumanian company at the price higher than the original contract. And it has initiated arbitration under the arbitration clause at the ICC Arbitration Court to claim compensation for the loss due to the price difference. CISG and ULIS were closely studied along with the Yugoslav Law to determine whether the exporter could be exempted from the liability to damages. But the tribunal denied to accept the exporter's contention. The tribunal decided that the importer was entitled to damages due to the exporter's failure to deliver the additional quantity of goods at the original price. It was due to the fact that the price increase was not extremely sudden & high enough to exceed a reasonable entrepreneurial risk and also could be taken into account when concluding the contract.

• Journal of Korean Society for Quality Management
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• v.49 no.4
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• pp.595-607
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• 2021

Purpose: This study introduces a systematic framework to evaluate service satisfaction of cosmetic brands through online review analysis utilizing Text-Mining technique. Methods: The framework assumes that the service satisfaction is evaluated by positive comments from online reviews. That is, the service satisfaction of a cosmetic brand is evaluated higher as more positive opinions are commented in the online reviews. This study focuses on two approaches. First, it collects online review comments from the top 50 global cosmetic brands and evaluates customer service satisfaction for each cosmetic brands by applying Sentimental Analysis and Latent Dirichlet Allocation. Second, it analyzes the determinants that induce or influence service satisfaction and suggests the guidelines for cosmetic brands with low satisfaction to improve their service satisfaction. Results: For the satisfaction evaluation, online review data were extracted from the top 50 global cosmetic brands in the world based on 2018 sales announced by Brand Finance in the UK. As a result of the satisfaction analysis, it was found that overall there were more positive opinions than negative opinions and the averages for polarity, subjectivity, positive ratio, and negative ratio were calculated as 0.50, 0.76, 0.57, and 0.19, respectively. Polarity, subjectivity and positive ratio showed the opposite pattern to negative ratio, and although there was a slight difference in fluctuation range and ranking between them, the patterns are almost same. Conclusion: The usefulness of the proposed framework was verified through case study. Although some studies have suggested a method to analyze online reviews, they didn't deal with the satisfaction evaluation among competitors and cause analysis. This study is different from previous studies in that it evaluates service satisfaction from a relative point of view among cosmetic brands and analyze determinants.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.41 no.4
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• pp.424-432
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• 2016

World's leading countries are developing next generation digital broadcasting system specifications to support UHDTV (ultra-high definition television) contents and other various services. In order to maximize the transmission capacity by using the bandwidth efficiently, most broadcasting systems adopt MIMO-OFDM. In distributed-MIMO systems, multiple transmit antennas are spatially separated and therefore result in multiple timing offsets. To overcome this problem, this paper proposes a technique using a null symbol to detect each individual signal from distributed transmit antennas. By inserting null symbols before preambles, the receiver can distinguish the signals between each transmit antennas and perform frame synchronization. When the reception time difference is shorter than 500 samples, the proposed method outperforms the conventional method.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.33 no.4
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• pp.1675-1682
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• 2013

To resolve the Global Warming problem, it have to reduce $CO_2$ emission. Korea need to do actively more the effort to reduce the emission because $CO_2$ emission per person is top level in the world. It is performing variously. However, we should recognize the $CO_2$ emission attribute to decrease $CO_2$. Analyzing $CO_2$ emission of the construction equipment is important in this aspect. Present, the most popular $CO_2$ emission measuring method is the way using fuel consumption and emission factor. But this method have the problem of reliability because can't reflect the factor being out of proportion at fuel consumption. This study analyzed the reason of difference and compared to the emission factor method after calculate $CO_2$ emission in direct measurement method.