• 인터넷정보학회논문지
• /
• 제9권3호
• /
• pp.103-117
• /
• 2008

일반 고객이 대기업 혹은 중소기업, 증권, 금융, 은행권 등의 서비스를 제공받기 위해서는 보편적으로 인터넷, SMS(Short Message Service), ATM(Automated Teller Machine), DM(Direct Mail), 텔레포니 서비스 등을 사용한다. 특히, 화재 보험사 및 증권, 금융, 은행권의 경우는 QoS(Quality of Service) 보장을 통한 실시간성 제약 조건을 만족해야 한다. 본 논문에서는 고객의 최초 접점으로 이용될 수 있는 CRM(Customer Relationship Management) 환경 하에서 다중 채널 서비스를 위한 결함허용 IVR(Interactive Voice Response)을 설계 구현하였다. 제안한 모델은 대 고객 응대 CRM 모델로 효율적으로 이용될 것으로 사료된다.

• 한국국방경영분석학회지
• /
• 제2권1호
• /
• pp.163-176
• /
• 1976

The artillery fire is characterized by great damage that can be inflicted simultaneously to an area through concentrated firing. The field artillery guns used in R.O.K. Army are generally old. Thus high values of their velocity errors cause wide dispersion of shell landings. Therefore effects of the concentrated firing is lessened. In this paper a general model which considers all error factors involved in firing in general, is established first. Then from this a basic model which includes the errors involved in concentrated firing only, such as the ballistic error, velocity error, target density function, and damage function, is extracted. Among many weapon systems now in use a specific one called gun 'A' is selected and its concentration effects are measured through computer simulation. The results show that as the velocity error of a battery increases, its target coverage capability, i. e. concentration effect, decreases. Therefore the need arises for the field artillery commander to know beforehand characteristics, i.e. velocity errors, of the guns in his unit and also to carefully examine the problem of battery arrangement with the gun characteristics in mind in order to maximize the damage effects of his artillery unit.

• 한국군사과학기술학회지
• /
• 제17권3호
• /
• pp.342-349
• /
• 2014

MRDS is a short range missile/rocket defense system which protects a main battle tank(MBT) from threats in a short range. It is composed of 2 radars, 2 infrared trackers(IRTs), 1 fire control computer(FCC), 2 launchers and countermeasures. To guarantee the performance of the MRDS, these components have to be mounted on the vehicle with the known positions and directions and it is required to compensate the alignment errors. In this paper, a system alignment method using angular error compensation is proposed to install its components within a tolerance on the MBT. The test results are presented to evaluate and verify the effectiveness of the proposed method.

• 디지털융복합연구
• /
• 제14권4호
• /
• pp.239-249
• /
• 2016

본 연구에서는 청소년들이 가진 마음의 창 유형으로 개방형, 주장형, 신중형, 고립형의 네 기질들로 분류하고 스마트폰 중독에 미치는 영향을 분석하였다, 연구대상은 전북소재 3개 중학생 406명 이었으며, 측정도구로는 Luft(1970)의 '조해리 마음의 창' 검사와 한국정화진흥원이 개발한 '스마트폰 중독 진단척도'를 사용하였다. 본 연구의 결과 첫째, 성별에 관한 분석결과를 살펴보면, 성별에 따라서 청소년 스마트폰 중독의 차이점은 크지 않으나 남학생의 경우 내성에 영향을 받는 경우가 크고, 여학생의 경우 일상생활장애에 영향을 받고 있음을 알 수 있다. 둘째, 학년에 따른 차이에 관한 분석결과를 살펴보면, 스마트폰 중독의 하위요인인 일상생활장애, 내성은 통계적으로 매우 높은 유의미한 차이가 있는 것으로 나타났다. 셋째, 마음의 창 유형과 스마트론 중독간의 분석결과 주장형과 고립형은 스마트혼 중독에 유의미한 결과를 가져온 반면, 개방형은 부적인 상관관계를 나타냈다. 넷째, 마음의 창 유형이 스마트폰 중독에 의미 있는 영향을 미치는 변인인지에 대하여 검증한 결과 마음의 창 유형이 스마트폰 중독에 영향을 미치는 것을 알 수 있다. 이상의 결과를 바탕으로 스마트폰 중독에 가장 심각한 유형은 신중형과 고립형으로 나타났다. 그러므로 스마트폰 중독을 치료하는 프로그램 개발에 신중형과 고립형을 위한 구체적인 방안을 모색해야 될 것이다.

• 한국군사과학기술학회지
• /
• 제21권5호
• /
• pp.697-703
• /
• 2018

In this paper, we analyzed the operation of the ignition circuit for electronic arm and fire device(EAFD), and investigated the sensitive elements of the circuit system. For reliability analysis, the EAFD ignition circuit was modeled using the PSpice simulation tool, and the output results of the circuit were examined by changing the tolerance of each circuit element. Monte Carlo simulation was used by maintaining the values of the observed sensitive elements at ${\pm}10%$ of the original values and adjusting the values of the other components according to a random distribution. The histogram results of the output peak currents and pulse widths were represented by Weibull and Burr type XII function fittings in three cases(element values are +10 %, 0 %, -10 % of original). For the output peak currents, mean values were 1.0028, 1.0034, and 1.0050, where the variance values were calculated as 0.0398, 0.0396, and 0.0290 using the Weibull function fitting, respectively. For pulse widths, the mean values of 0.9475, 0.9907, and 1.0293 with the variance values of 0.0260, 0.0251, and 0.0238 were obtained using the Burr Type XII function fittings.

• Journal of Forest and Environmental Science
• /
• 제31권4호
• /
• pp.312-316
• /
• 2015

Rhizina undulata, the causal agent of Rhizina root rot, is a soil-borne fungus occurring on coniferous trees. The destruction of coastal forests caused by R. undulata infection has been mainly associated with bonfires at camping sites. However, Rhizina root rot was observed in the western coastal forests without fire. It was hypothesized that Rhizina root rot in this area might be closely related to the soil salinity, which can facilitate the growth and survival of R. undulata. So, the variation in sodium chloride (NaCl) resistance among isolates of Rhizina undulata was compared using liquid media containing different concentrations of NaCl ranging from 0 mM to 300 mM. Our results showed that, albeit of no growth at a higher concentration of NaCl (300 mM), most of R. undulata isolates were capable of germinating and grew at up to 100 mM, indicating that NaCl resistance varies among R. undulata isolates. It was further found that isolates from coastal areas seemed to be more tolerant to NaCl than those further away the coast. We demonstrated that R. undulata could be possible to survive in coastal areas, but was lower NaCl tolerance than other fungi.

• 디지털콘텐츠학회 논문지
• /
• 제19권2호
• /
• pp.269-276
• /
• 2018

본 연구의 목적은 스마트폰 중독 예방을 위한 문학치료 프로그램이 청소년에게 효과적인지를 검증하는데 있다. 연구대상은 J시 K중학교 전체 학생 150명을 대상으로 스마트폰 중독 척도검사를 실시하였으며, 프로그램을 완성한 후 스마트폰 중독 검사지로 실험, 통제집단 모두에게 사후검사를 실시하였다. 연구결과, 이 프로그램은 스마트폰 중독을 완화시키는데 효과가 있는 것으로 나타났으나, 지향적 생활 문제를 감소시키는데 효과적이지 않는 것으로 나타났다. 또한 내성과 통제력상실 문제와 금단과 정서경험문제를 감소시키는데 효과가 있는 것으로 나타났다. 연구결과 제언은 청소년을 위한 집단프로그램이 학교와의 연계통로가 이루어지지 않는다면 날로 증가하는 스마트폰 중독의 문제를 효과적으로 예방하기 어렵기 때문에 지역 내 관련기관과의 연계를 위한 제도적 장치가 요구된다. 따라서 학교 교과목 중 컴퓨터 교과 과정 속에 스마트폰 중독 예방을 위한 부모교육을 실시할 필요가 있다.

• 한국기계가공학회지
• /
• 제17권6호
• /
• pp.170-176
• /
• 2018

Recently, weapon system requires personal protection products due to the explosion of rapid-fire explosion, which is considered to be multi threat in modernization, complication and war against terrorism. However, the conventional Korean military bullet protection helmets are not suitable for wearing convenience and combatant interoperability in terms of ergonomic. In this paper, we propose a suitable 3D Scanning method for the head, and compare the measured 3D dimension with the existing 2D measurement value to identity the reliability. Reverse engineered soldier head using the quick surface method was realized with a perfect free-form surface and satisfactory tolerance range (${\pm}0.2mm$). Through the comparison of 3D and 2D measured head dimensions, the absolute error value was 0.73 mm on average and relative error was 0.35 %, confirming the high accuracy of the 3D scan modeling. Also, quick surface method using 3D scanner is suggested a fast and accurate skill for ergonomics in obtaining the head modeling needed for military's personal bullet protection helmet design.

• 한국군사과학기술학회지
• /
• 제24권3호
• /
• pp.328-338
• /
• 2021

A study on common modular design based on open standards to reduce the life cycle cost of ground weapon system is underway. Since the ground weapon system includes major mission equipment such as fire control system, it is essential to apply the concept of fault tolerance through automatic reconfiguration and blocking unspecified equipment through connectivity control. However, it is difficult to generalize due to the difference in operating characteristics for each system. In this paper, we propose a plug-and-play framework, which includes plug-and-play architecture and mechanism. The proposed method can be used in common by the application of each component as it is divided into a common service layer. In addition, the proposed connectivity control and autonomous reconfiguration method facilitates reflection of operating characteristics for each system. We constructed a verification environment that can simulate ground weapon systems and components, and verified that the proposed framework works through scenario-based functional tests.

• Geomechanics and Engineering
• /
• 제27권6호
• /
• pp.537-550
• /
• 2021

There are various technical problems need to be solved in the construction process of pre-setting an isolation wall into a double lane in the outburst prone mine. This study presents a methodology that pre-setting an isolation wall into a double lane without a coal pillar. This requires the excavation of two small section roadways to dig a wide section roadway, followed by construction of the separation wall. During this process the connecting lane is reserved. In order to ensure the stability of the separation wall, the required bearing capacity of the isolation wall is 4.66 MN/m and the deformation of the isolation wall is approximately 25 cm. To reduce the difficulty of implementing support the roadway is driven by 5 m/d. After the construction of the separation wall, the left side coal wall is brushed 1.5 m to make the width of the gas roadway reach 2.5 m and the roadway support utilizes anchor rod, ladder beam, anchor cable beam and net configuration. During construction, the concrete pump and removable self-propelled hydraulic wall mold are used to pump and pour the concrete of the isolation wall. In the process of mining, the stress distribution of coal body and isolation wall is detected and measured on site. The results demonstrate that the deformation of the surrounding rock of roadway and separation of roof in the roadway is small. The stress of the bolt and anchor cable is within equipment tolerance validating their selection. The roadway is well supported and the intended goal is achieved. The methodology can be used for reference for similar mine gas control.