• Title/Summary/Keyword: Impact Characteristics

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Analyzing the Business Performance of Internet Primary Banks and Local Banks Using Financial Characteristics (재무적 특성을 이용한 인터넷전문은행과 지방은행의 경영성과 분석)

  • Lee, Jong Hwa
    • The Journal of Information Systems
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    • v.33 no.1
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    • pp.115-131
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    • 2024
  • Purpose This study aims to analyse the impact of the development of fintech and the emergence of internet primary banks due to the increasing use of smartphones on the performance of traditional local banks from both financial and non-financial perspectives. Return on equity (ROE) and return on assets (ROA) are used to assess the performance differences between the two types of banks and how these differences are affected by their financial characteristics. Design/methodology/approach Using return on equity (ROE) and return on assets (ROA) as indicators, we identified the differences in operating performance between the two types of banks. In addition, this study analysed the impact of financial characteristics on profitability through regression analysis with various control variables. We further studied the impact of non-financial characteristics (customer reviews, social media reactions, etc.) on operating performance. Findings The net interest margin ratio of local banks had a positive impact, while the marketable securities ratio of Internet primary banks had a negative impact. The non-financial analysis shows that the number of customer reviews and social media reactions have a significant impact on the performance of Internet primary banks, suggesting that customer satisfaction and positive market perception are important factors in the performance of Internet primary banks.

Size Optimization of Impact Limiter in Radioactive Material Transportation Package Based on Material Dynamic Characteristics (재료동특성에 기초한 방사성물질 운반용기 충격완충체의 치수최적설계)

  • Choi, Woo-Seok;Nam, Kyoung-O;Seo, Ki-Seog
    • Transactions of the Korean Society of Pressure Vessels and Piping
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    • v.4 no.2
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    • pp.20-28
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    • 2008
  • According to IAEA regulations, a transportation package of radioactive material should perform its intended function of containing the radioactive contents after the drop test, which is one of hypothetical accident conditions. Impact limiters attached to a transport cask absorb the most of impact energy. So, it is appreciated to determine properly the shape, size and material of impact limiters. A material data needed in this determination is a dynamic one. In this study, several materials considered as those of impact limiters were tested by a drop weight facility to acquire dynamic material characteristics data. Impact absorbing volume of the impact limiter was derived mathematically for each drop condition. A size optimization of impact limiter was conducted. The derived impact absorbing volumes were applied as constraints. These volumes should be less than critical volumes generated based on the dynamic material characteristics. The derived procedure to decide the shape of impact limiter can be useful at the preliminary design stage when the transportation package's outline is roughly determined and applied as input value.

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Coupled foot-shoe-ground interaction model to assess landing impact transfer characteristics to ground condition

  • Kim, S.H.;Cho, J.R.;Choi, J.H.;Ryu, S.H.;Jeong, W.B.
    • Interaction and multiscale mechanics
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    • v.5 no.1
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    • pp.75-90
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    • 2012
  • This paper investigates the effects of sports ground materials on the transfer characteristics of the landing impact force using a coupled foot-shoe-ground interaction model. The impact force resulting from the collision between the sports shoe and the ground is partially dissipated, but the remaining portion transfers to the human body via the lower extremity. However, since the landing impact force is strongly influenced by the sports ground material we consider four different sports grounds, asphalt, urethane, clay and wood. We use a fully coupled 3-D foot-shoe-ground interaction model and we construct the multi-layered composite ground models. Through the numerical simulation, the landing impact characteristics such as the ground reaction force (GRF), the acceleration transfer and the frequency response characteristics are investigated for four different sports grounds. It was found that the risk of injury, associated with the landing impact, was reduced as the ground material changes from asphalt to wood, from the fact that both the peak vertical acceleration and the central frequency monotonically decrease from asphalt to wood. As well, it was found that most of the impact acceleration and frequency was dissipated at the heel, then not much changed from the ankle to the knee.

A Study on the Analysis of Propagation Characteristics for Floor Impact Noise in Apartment Houses (공동주택의 바닥충격음 전달 특성 분석에 관한 연구)

  • Seok Ho-Tae;Cho Kyung-Jae;Cha Min-Chul;Jae Sung-Ho
    • Journal of the Korean housing association
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    • v.16 no.5
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    • pp.91-98
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    • 2005
  • The purpose of this study is to analysis of propagation characteristics for floor impact noise in attendance upon investigating standard of insulation performance, measurement and evaluation, understanding characteristics of a measuring factor for floor impact noise in apartment houses. Four cases which was before occupied apartment in Daegu was selected for experiment. Floor impact noise of measurement and evaluation method which are specified in the Korea Standard 2810-1, 2810-2, 2863-1 and 2863-2 was selected for this study. As the result of this study, 1) Especially, there is not a difference for apartment size, but the apartment of 40py type is lower than 30py's about $1\~2\;dB$ for light-weighted and heavy weighted impact sound. 2) The floor impact sound insulation performance is similar about measurement location of the same floor structure. 3) The floor impact sound insulation performance is not a difference about the slab area.

The Evaluation of Strength and Damage Characteristics by AE in Impact Test of CFRP (탄소섬유 복합재료의 AE에 충격손상재강도와 손상특성 평가)

  • 이상국;오세규;남기우;김옥균
    • Journal of Ocean Engineering and Technology
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    • v.9 no.1
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    • pp.47-56
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    • 1995
  • This study is aimed to have a database of system development for the prediction, monitoring, analyzing, and evaluation of tensile strength and damage characteristics through AE technique for CFRP. Therefore the correlations between impact characteristics (such as impact velocity, impact energy, delamination area etc) and AE signals for CFRP laminates were investigated. And also it were accomplished the evaluation of tensile strength and the investigation on correlation with AE signals for impact damaged specimen of CFRP laminates.

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Low Velocity Impact Characteristics of Glass/phenol Composite Laminates (Glass/phenol 복합적층판의 저속충격 특성)

  • Kim, Jae-Hoon;Kim, Hu-Shik;Park, Byoung-Joon;An, Byoung-Wook
    • Proceedings of the KSME Conference
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    • 2001.11a
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    • pp.228-233
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    • 2001
  • It is well known that composite laminates are easily damaged by low velocity impact. The damage of composite laminates subjected to impact loading are occurred matrix cracking, delamination, and fiber breakage. The damage of matrix cracking and delamination are reduced suddenly the compressive strength after impact. This study is to evaluate impact characteristics and the relationship between impact force and inside damage of composite laminates by low velocity impact loading. UT C-scan is used to determine impact damage areas by impact loading.

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A Study on the Characteristics of Environmental Impact with the Seat Material of Electric Motor Unit (EMU) (전동차 의자의 재질에 따른 환경부하 특성에 관한 연구)

  • Lee, Jae-Young;Kim, Bo-Kyong;Chun, Yoon-Young;Kim, Yong-Ki
    • Journal of the Korean Society for Railway
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    • v.9 no.5 s.36
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    • pp.524-531
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    • 2006
  • Environmental problem is one of important global issues. Transportations are main pollutant emission sources. Although railroad is stilt an environmental-friendly transportation, its environmental impact has been increased continuously. Especially, because a large amount of environmental impact is released from vehicles and facilities, it is necessary to assess and to reduce their environmental impact. Life cycle assessment (LCA) is a representative method which can evaluate environment impact through the whole life cycle of a product or a process. In this study, the environmental impact of seat in the electric motor unit (EMU) was analyzed quantitatively with its material using lift cycle assessment (LCA). As a result, the characteristics of environmental impact were investigated differently with the material of seat. Among ten impact categories, the seat with aluminum and FRP showed the highest ozone depletion (OD). On the other hand, in the seat with stainless steel and plastic, fresh water aquatic ecotoxicity (FAET) and marine water aquatic ecotoxicity (MAET) were high relatively. Therefore, the parts of EMU must be selected considering the characteristics of environmental impact in future.

The Impact of the Organization Justice and Executive Characteristics on Job Satisfaction - Focused on the mediating effects of trust - (조직공정성과 경영자특성이 직무만족에 미치는 영향 - 신뢰의 매개효과를 중심으로 -)

  • Hwang, Doo-Mo;Ha, Kyu-Soo
    • Journal of Digital Convergence
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    • v.11 no.3
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    • pp.221-232
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    • 2013
  • Setting organization justice and executive characteristics as independent variables, job satisfaction as dependent variable and trust as mediating variable for small and medium enterprise, this study intended to corroboratively identify the mutual impact between independent variables and dependent variables. The study shows that the distribution justice, procedure justice and interaction justice of organization justice wholly have positive(+) impact on job satisfaction and leadership characteristics, impact characteristics and psychological characteristics of executive characteristics wholly have positive(+) impact on job satisfaction, thereby having mediating effects through trust perceived by employees. Namely, if the job efficiency and moment is enhanced by increasing employees' job satisfaction, the productivity of enterprise will be heightened after all and its profitability will be improved in the long run.

Finite Element Analysis of Impact Characteristics of Shoes-Leg Coupled Model to landing Mode (착지모드에 따른 신발-족 연계모델의 충격특성 유한요소 해석)

  • Ryu Sung-Heon;Kim Sung-Ho;Cho Jin-Rae
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.29 no.9 s.240
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    • pp.1191-1198
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    • 2005
  • This paper is concerned with the numerical investigation of the landing impact characteristics of sport shoes to the landing mode. In most court sport activities, jumping and landing are fundamental motions, and the landing motion is largely composed of forefoot and rearfoot landing modes. Since the landing impact may, but frequently, lead to unexpected injuries of players, the investigation of its characteristics and the sport shoes design for reducing it are of a great importance. To investigate the landing impact characteristics to the landing mode, we construct a shoes-leg coupled model and carry out the numerical simulation by an explicit finite element method.

Variation of Impact Characteristics of ISB Panels with a Pyramidal Inner Structure According to Joining Technologies (피라미드형 내부구조체를 가진 ISB 판넬의 접합형태에 따른 충격 특성 변화)

  • Ahn, Dong-Gyu;Moon, Gyung-Jae;Jung, Chang-Gyun;Yang, Dong-Yol
    • Journal of the Korean Society for Precision Engineering
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    • v.24 no.9
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    • pp.110-118
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    • 2007
  • ISB (Inner structured and bonded) panel with a pyramidal inner structure is actively developing to reduce the weight and to improve the crashworthiness of the material. The objective of this paper is to investigate into the variation of impact characteristics of ISB panels with a pyramidal inner structure according to joining types between skin sheets and inner structures. Several drop impact tests have been performed. In order to examine the impact characteristics at a drawing condition, drawing type of experimental set-up has been proposed. From the results of the experiments, the influence of joining types between skin sheets and the inner structures on the characteristics of the deformation, the energy absorption and the failure has been quantitatively examined. In addition, it has been shown that maximum load decreased and the maximum displacement increases as the joining type changes from the bonding to the welding. The results of the observation of the specimen have been shown that major wrinkles form in the minor crimping direction irrespective of the joining types. Through the comparison of the experimental results for bonding and welding specimens, it has been shown that the absorption energy of the bonded specimen is nearly 1.3-1.5 times of the welded specimen at the same displacement.