• Proceedings of the Korean Society of Computer Information Conference
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• 2020.01a
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• pp.159-160
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• 2020

4차 산업 혁명을 통해 산업 현장에서 수많은 작업들이 로봇을 이용한 자동화로 대체되고 있는 가운데, 물류 산업에서는 아직도 물건이나 화물을 피킹하고, 분류하는 과정에서 많은 인력이 동원된다. 이러한 것을 극복하기 위해 해외의 다양한 회사들이 피킹/분류 작업의 자동화를 위해 많은 연구를 하고 있다. 피킹/분류 시스템은 인력을 사용하는 과정에서 많은 인건비가 발생하고, 무거운 물건을 옮기다가 허리를 다치거나 중장비 운행 중 사고로 인해 인명 피해가 발생하기도 한다. 이러한 문제점을 개선하기 위해 목적지 까지 라인 트레이서를 통해 이동하며, 원하는 물건을 적재 하도록 로봇 암을 적용한 '자동물류분류 시스템' 기술을 제안한다. 기존의 단순 반복 노동의 피킹/분류 작업을 수행하며, 자동으로 지정된 검은 라인을 따라 이동하고, 어플리케이션을 통해 선택된 물건을 찾아가 적재하는 시스템이며, 원격으로 수동 조작 또한 가능하다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.465-466
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• 2023

최근 '블라인드', '에브리타임'등 조직을 기반으로 한 커뮤니티가 활성화되고 있는 추세이다. 커뮤티니 내에서는 다양한 정보들이 공유되고 있고 그중 대표적인 정보가 맛집에 대한 정보이다. 잘 알려지지 않은 숨은 맛집들이나 합리적인 가격에 맛있는 식사를 제공하는 식당이 비용이나 인건비 등 다양한 문제로 작은 골목에 숨어있는 경우가 많은데 커뮤니티 내에서는 지역민이 아니면 알 수 없는 이런 식당들이 공유되곤 한다. 'PickALunch"는 이러한 정보들을 공유하고 알릴 수 있는 앱 어플리케이션이다. 대학생에게 익숙하고 트렌디한 UI와 Algolia, Firebase, KakaoMap 등 다양한 API를 이용하여 누구나 쉽게 식당을 검색하고 찾아갈 수 있도록 개발하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.522-523
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• 2023

CTR(Click Through Rate) 예측은 사용자가 광고나 아이템을 클릭할 확률을 예측하는 데 사용되는 용어로, 광고 분야에서 중요한 연구 분야로 자리 잡았다. 인터넷 데이터의 양이 증가함에 따라, 전통적인 피쳐 엔지니어링의 인건비는 계속해서 상승하고 있다. 특징 상호 작용에 대한 의존도를 줄이기 위해, 본 논문은 TMH(Two-Tower Multi-Headed Attention Neural Network) 접근법이라고 하는 명시적인 특징 상호 작용과 암시적인 특징 상호 작용을 결합한 융합 모델을 제안한다. CTR 예측에서 TMH 의 효과를 평가하기 위해 3 개의 실제 데이터 세트를 사용하여 많은 수의 실험을 수행하였다. 성능은 3 개의 데이터 세트에서 0.12%, 0.41% 및 0.68%으로 향상되었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.05a
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• pp.1069-1072
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• 2008

RFID 시스템은 유비쿼터스 환경을 구축하기 위한 핵심적 기술로 유일한 사물 식별 기술로 각광받고 있다. 현재 국내에서도 물류 시스템, 유통, 고속도로 톨게이트 등 각 산업 분야에 RFID 시스템을 적용 하여 성공적인 운영을 하고 있으며 이로 인한 인건비 절감, 수송 비용 절감, 교통 체증 감소 등 부가적인 효과를 얻고 있다. 따라서 향후 더욱더 RFID 시스템을 이용한 각 산업 분야 적용은 늘어 날것으로 예상되며 특히 유비쿼터스 사회의 도래로 인한 개인화 특수 목적 서비스에 대한 적용에 큰 효과를 가져 올 것으로 기대 한다. 그러나 RFID 시스템은 하드웨어적 구성이 단순하여 보안에 대한 문제점을 드러내고 있으며 이러한 문제점을 해결하기 위해 본 논문에서는 모바일 컴퓨팅 시스템에 최적화 된 암호 알고리즘인 ECC 알고리즘을 이용한 재 암호화 기법을 제안한다.

• Management & Information Systems Review
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• v.35 no.1
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• pp.189-206
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• 2016

It was required to attach the documents on the details of external audit including the number of the participants in external audit, audited parts and audit times under the Article 7-2 on the audit report to the accounting audit report from 2014 in accordance with the amendment to the Act on External Audit of Stock Companies. This study aim to calculate the audit fee based on the estimated cost of service calculation of the government contribution agencies by reflecting the implementation of the revised external audit. This study calculated the audit fee for the target company (a listed company assumed to have no internal control risks and relevant audit risks for unqualified opinion in the previous year, 100 billion won of total amount of asset, manufacturing company in the previous year and preliminary client request) by putting together four items of expenditure including employment costs, expenditure, general management expenses and profit in accordance with the calculation system of cost of service under the State Contract Act. Then, it used the data collected from the documents on the details of the revised external audit after requesting estimation on the target company with the estimated cost to Big-4 accounting firms to identify the participants and times of the accounting audit. The employment costs applied 150% of participation rate of the base price of employment costs for the academic research service cost in 2014, the expenditure used the average value of accounting firms of corporate business management analysis of the Bank of Korea (2013), the general management expenses applied 5% of the general management rate of service business under Article 7-1 of the Enforcement Rule of the Act on Contracts to which the State is a Party and the profit applied 10% of profit rate of service business under Article 7-2 of the Enforcement Rule of the Act on Contracts to which the State is a Party. Based on the calculation of the estimated costs by applying the above, the audit fee was estimated at 50,617,769won. Although the result is not the optimal audit fee, it may be used as a basic scale to compare the audit fees of companies without criteria. Also, such amendment to the Act on External Audit of Stock Companies may improve independence of auditors and transparency of the accounting system rather than previous announcing only the total audit times.

• Korean Journal of Construction Engineering and Management
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• v.15 no.1
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• pp.11-19
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• 2014

The Construction industry is a labor-intensive industry that its labor cost takes up about 30~40% out of the whole construction cost. However, due to a stereotype that on-site work is a 3D job there is a shortage of the labor forces. Modular construction method is to produce modular units in the plant so that workers could work stably. Also, after delivering the module from plant to the site, there will be only installment to be required that shortens construction duration. Even though the modular market is currently expanding based on military facilities in Korea, its best strengths are not demonstrated well which are shortened construction period and low cost. It also causes labor problem of production due to minimum utilization of the modular construction method. Multi-skilled labor means a technician that is able to perform more than two kinds of work with more than two techniques. Multi-skilled labor can proceed smoothly by figuring out the connectivity between the precedent and following operations. Therefore, this research is to apply the concept of Multi-skilled labors, suggest solutions and allocate manpowers efficiently. As a result, it helps to decrease idle manpowers during the operation and the total labor forces can be saved. Low cost is the original strength of the modular which can stand out so the modular market is expected to expand.

• Journal of the Institute of Electronics and Information Engineers
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• v.54 no.4
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• pp.129-134
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• 2017

In the present society, our current technology associated with bakery industry has been improved as much as technical development can get abreast of the Western one where the bread has originated and has been awarded and ranked in the highest level of many bakery or pastry competitions. In these trends, many people are running for high value added business such as bakery industry and bakery $caf{\acute{e}}$, etc. with big interest. However, high labor cost of technician and difficulties in human resource management become obstruction factors in the growth of the bakery industries. Therefore, in this paper, the designed system for both dividing and rounding dough quickly and exactly at the same time was studied. The main function of this system is to divide the original dough into 3 tracks and then, to place 4 doughs in the inner track, 12 doughs in the mid track, 20 doughs in the outer track, totally 36 doughs in a routine. It takes much energy because 36 doughs can be completed in a routine. Therefore, this system uses hydraulic pressure and a 0.75Kw induction motor is used for dough rounding. This system can make primarily fermented dough into 36 divided doughs very quickly and exactly on a guide panel at the desired weight by dividing it within 1-9 seconds and by rounding each within 1-9 seconds. This system is very effective in bakery industry to minimize labor cost and it is expected to supply more hygienic products to the customers.

• Journal of Korean Society of Forest Science
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• v.80 no.2
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• pp.220-231
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• 1991

The main purpose of this research is to standardize the logging operation with special reference to the net working time for thinning. This study was carried out to obtain the standard working method and working technique for Korean logging operation through the comparison of the present Korean working method and the German standard working method 1. The net working time devided into work elements showed little difference between those two working methods. 2. From the correlation analysis, net working time was significantly correlated with breast height diameter, the dependant variable, with the highest correlation coefficient in each species. 3. Total working time increases by 11 to 13 seconds to every 1 centimeter increase in breast height diameter from i to 16 centimeter. 4. The result of this study concluded that the German working method is recommended for improving the labour problems in the forest operation due to high wages and lack of manpower gradually increasing from now in Korea. In addition to the application of this standard working method, the technical training for the method should be done to the workers for improving the productivity.

• Environmental and Resource Economics Review
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• v.20 no.3
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• pp.489-529
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• 2011

When greenhouse gas mitigation policies are implemented, energy intensive manufacturing industries are influenced much due to an increase in cost. However, industries that have price setting power are damaged less by the policies. Therefore, this paper analyzes vulnerability of energy intensive manufacturing industries to the policies by measuring price setting power of the industries. We analyzed price setting power model through ECM, employing the import prices and wages as independent variables. The industries that their prices react to import prices are price takers, which their prices are determined by rival's ones. On the other hand, the industry that their prices react to wages that mean domestic cost are price setters, and they will be less vulnerable to the policies. In addition, fluctuation of energy prices would be reflected in import prices because it influences other countries than my one. Thus, we employed energy prices as control variable to measure the net effects of import prices. As empirical results, petroleum products, chemical products, non-metallic mineral products, textiles, and motor vehicles sector have price setting power, so the industries have competitiveness on greenhouse gas mitigation policies.

• The Korean Journal of Financial Management
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• v.22 no.2
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• pp.71-89
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• 2005

The purpose of this research is to examine X-efficiency of Korean local credit unions in 2001 by employing the stochastic frontier approach. This study uses the intermediation approach in order to define outputs and inputs of the credit unions. We define the outputs as the amounts of loans, and securities. The inputs are labor, deposit and physical capital. The price of labor is estimated by dividing the total wages by the number of employees. The price of deposit equals total interest divided by total deposit, and the price of physical capital is also computed to divide the total sales and administrative expenses by the physical capital. By the result of this study, the average efficiency score is 0.81. This fact indicates that credit unions can reduce their inputs by 19% for the given outputs. If results are arranged into quartiles based on the efficiency, inefficiency of top 25% credit unions is below 9%, and half of them is over 17%. In addition, e result shows that the efficiency is significantly influenced by region and size even if credit unions in Seoul and Daegu showed little difference in efficiency by size. Generally, medium size credit unions are more efficient than large size.