• Title, Summary, Keyword: CPC

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A Patent Trend Analysis for Technological Convergence of IoT and Wearables (IoT와 Wearables 기술융합을 위한 특허동향분석)

  • Kang, Ji Ho;Kim, Jong Chan;Lee, Jun Hyuck;Park, Sang Sung;Jang, Dong Sik
    • Journal of Korean Institute of Intelligent Systems
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    • v.25 no.3
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    • pp.306-311
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    • 2015
  • This study aims at analyzing the convergence of Internet-of-Things and wearables technologies using cooperative patent classification(CPC). CPC, introduced to an increasing number of technological fields of Korean patents, is expected to be widely used in Patent Informatics because the classification codes in CPC are more specific than those of IPC, which reflect the characteristics of technologies in detail with accuracy. CPC has seldom been used up to date and most of the previous researches on technological convergence used IPC. As a pre-analysis step for analyzing the trend of technological convergence of IoT and wearables, CPC and IPC codes assigned to each patent were compared. By applying association rule mining to the analysis of CPC codes, we identified the technological fields where convergence frequently takes place and examined the trend of technological convergence over time.

A Study on the Efficiency of Internet Keyword Advertisement According to CPM and CPC Methods by Analyzing Transactional Data (키워드 검색 광고 운영 DB 데이터 분석을 통한 CPM와 CPC방식의 광고효과 연구)

  • Kim, Do-Yeon;Lim, Gyoo-Gun;Lee, Dae-Chul
    • The Journal of Society for e-Business Studies
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    • v.16 no.4
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    • pp.139-154
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    • 2011
  • Recently Internet keyword search service providers tends to use CPC advertizement method rather than CPM method. However researches how much the CPC method is beneficial to advertisers than CPM method in certain perspectives are insufficient and not performed systematically. So this paper tries to do comparative analysis about the two methods by analyzing the real transactional DB data from an advertizement agency. Due to the difficulties of direct comparison between the two methods because of their different expose positions on the Web and different types of attributes in DB, we did some preprocessing step for the transactional data. From the result of analysis, the click rate of CPC is higher than CPM by 1.3% and the unit cost for the CPC per one click is lower than CPM method by 51 Won. It shows the CPC method is more effective than CPM method for advertizement from the point of advertizement effectiveness (CTR) and advertizement cost (CPC). We hope this research would give useful information to advertisers and marketing managers in making advertizement strategy, marketing decision and budgeting.

Intercomparison of Number Concentrations by CPCs using Generated Particles in Chamber (챔버 내 발생 입자를 이용한 CPC 수농도 비교 평가)

  • Bae, Min-Suk;Park, Da-Jeong;Park, Seung-Shik;Chen, Wei-Nai
    • Journal of Korean Society for Atmospheric Environment
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    • v.30 no.6
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    • pp.619-630
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    • 2014
  • Two butanol-based Condensation Particle Counters (CPC 3022, CPC 3025), three water-based CPCs (CPC3781, CPC3785${\times}$2), a Gardner Counter, a Fast Mobility Particle Sizer (FMPS), and an Aerosol Electrometer (AE) were deployed to measure the number concentrations from atomized aerosol under six different conditions. Comparisons of particle number concentrations measured by the CPCs, FMPS, and AE were conducted to evaluate the performance of the each CPCs using laboratory generated artificial particles such as NaCl, succinic acid ($C_4H_6O_4$), and particles generated by propane torch & heat gun in the chamber. Good correlation between the CPC3025 and FMPS was observed for the total particle number concentrations in the size range 15 nm to 90 nm. In addition, this paper suggests that photometric mode in water-based CPC3785 could not be used as quantitative of number concentrations for CPC3785.

Transport behavior of a surfactant tracer(CPC) with Langmuir type adsorption isotherm on NAPL-water interface in a homogeneous porous medium (NAPL-물 계면에서 Langmuir형 흡착특성을 보이는 계면추적자(CPC)의 다공성 균질매질내 유동특성)

  • 김헌기;문희수;이상훈
    • Journal of Soil and Groundwater Environment
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    • v.6 no.2
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    • pp.3-13
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    • 2001
  • It has been known that nonlinear characteristics of sorption affect the transport behavior of water soluble pollutants in soils. However detailed experimental studies have not been performed to verify the effect of non-linearity of adsorption isotherm on transport of chemicals in porous media. In this research, the distortion of breakthrough curves of a cationic surfactant (cetylpyridinium chloride, CPC) in a engineered stainless steel column packed with glass beads were investigated. Glass beads with about 110 $\mu\textrm{m}$diameter coated with a thin n-decane film were used as the media providing the sorption surface for CPC. The CPC adsorption isotherm on the surface of n-decane from aqueous solution was a typical Langmuir type. The breakthrough curve of CPC using step Input showed a late breakthrough on the front side and early breakthrough on the back side accordance to the shape of the isotherm. The retardation factor of CPC was found to be a strong function of the input concentration, which also a manifestation of the non-linearity of the isotherm. The retardation factors for the CPC with step input agreed with those of pulse input that the maximum concentrations are controlled to be the same as the step input concentrations. This results support the validity of the unproven field practices of using hydrogeotracers with non-linear adsorption isotherms to determine the hydrogeological parameters, e.g., NAPL saturation, air-water or NAPL-water interfacial areas.

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Remediation Groundwater contaminated with chromate using Micellar - enhanced ultrafiltration(MEUF)

  • 양지원;백기태;김보경
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • pp.306-309
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    • 2002
  • Micellar-enhanced ultrafiltration was investigated to remediate groundwater contaminated with chromate using a cationic surfactant, cetylpyridinium chloride (CPC). Removal of chromate was expressed as a function of molar ratio of CPC to chromate. With 10 molar ratio of CPC, removal efficiency of chromate was reached to over 99%. The rejection of CPC was 90% at 1 molar ratio, gradually increased as the molar ratio increased.

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Analysis of Technology Association Rules Between CPC Codes of the 'Internet of Things(IoT)' Patent (CPC 코드 기반 사물인터넷(IoT) 특허의 기술 연관성 규칙 분석)

  • Shim, Jaeruen
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.12 no.5
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    • pp.493-498
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    • 2019
  • This study deals with the analysis of the technology association rules between CPC codes of the Internet of Things(IoT) patent, the core of the Fourth Industrial Revolution ICT-based technology. The association rules between CPC codes were extracted using R, an open source for data mining. To this end, we analyzed 369 of the 605 patents related to the Internet of Things filed with the Patent Office until July 2019, with a complex CPC code, up to the subclass-level. As a result of the technology association rules, CPC codes with high support were [H04W ${\rightarrow}$ H04L](18.2%), [H04L ${\rightarrow}$ H04W](18.2%), [G06Q ${\rightarrow}$ H04L](17.3%), [H04L ${\rightarrow}$ G06Q](17.3%), [H04W ${\rightarrow}$ G06Q](9.8%), [G06Q ${\rightarrow}$ H04W](9.8%), [G06F ${\rightarrow}$ H04L](7.9%), [H04L ${\rightarrow}$ G06F](7.9%), [G06F ${\rightarrow}$ G06Q](6.2%), [G06Q ${\rightarrow}$ G06F](6.2%). After analyzing the technology interconnection network, the core CPC codes related to technology association rules are G06Q and H04L. The results of this study can be used to predict future patent trends.

Anti-hyperlipidemic Effects of the Herbal Extract Mixture of Cnidium officinale, Petasites japonicus and Coptis chinensis on Mice with Tyloxapol (천궁(川芎), 머위, 황연(黃連) 추출물 조성이 생쥐의 지질대사에 미치는 영향)

  • Kim, Sang-Dae;Ahn, Sang-Hyun;Kim, Jin-Taek;Shin, Heung-Mook
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.20 no.2
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    • pp.377-382
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    • 2006
  • This study was performed to evaluate the effect of the herbal extract mixture of Cnidium officinale, Petasites japonicus and Coptis chinensis (CPC) on the lipids metabolism in mice with tyloxapol. ICR mice weighing between 30-40 g were divided into four groups: normal group, 600mg/kg tyloxapol injected group, $50\;{\mu}g/g$ CPC treated group 6h after tyloxapol injection (SAM1), and tyloxapol and CPC treated group (SAM2), respectively. Tyloxapol or CPC was injected intraperitoneally. Tyloxapol caused an elevation of total cholesterol (TC), triglycerides(TG), and LDL-cholesterol and a decrease of HDL-cholesterol. In addition, tyloxapol induced accumulation of lipid including cholesterol in both the liver and kidney. Serum levels of TC, TG and LDL-cholesterol were decreased whereas HDL-cholesterol was increased by CPC. CPC increased in HDL-cholesterol /total cholesterol ratio and lowered atherogenic index. The levels of TC, TG and LDL-cholesterol by CPC were rather lower in SAM2 than SAM1. CPC also inhibited lowering HDL-cholesterol by tyloxapol. CPC reduced lipid blots and cholesterol particles in both the deposition and size in the liver and kidney with tyloxapol. These results suggest that CPC might be expected to be beneficial for protection and treatment of hyperlipidemia by the disturbance of lipid metabolism.

Rheological Properties of Calcium Phosphate Cement Mixed with 2 Kinds of Setting Solution (2종의 경화액과 혼합된 calcium phosphate cement의 유변학적 성질에 관한 연구)

  • Chang, Seok-Woo;Kwon, Ho-Beom;Yoo, Hyun-Mi;Park, Dong-Sung;Oh, Tae-Seok;Bae, Kwang-Shik
    • Journal of Dental Rehabilitation and Applied Science
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    • v.24 no.3
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    • pp.311-316
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    • 2008
  • Calcium phosphate cement (CPC) has been used as bone substitute successfully due to good biocompatibility and osteoconductivity. One of the important mechanical characteristics of CPC is flowablility, which can be evaluated by measuring rheological parameters. However, there have been few studies that measured rheological properties of CPC. The purpose of this study was to evaluate the rheological properties of CPC paste mixed with 2 kinds of setting solutions, 2% hydroxyprophyl methylcellulose (HPMC) and 35% polyacrylic acid (PAA). The CPC used was dicalcium phosphate dihydrate (DCPD). Rheological properties of CPC paste were measured using rheometer. The statistical analysis was carried out with Mann-whitney test with Bonferronis collection. CPC with both setting solutions showed shear thinning behavior. CPC with 2% HPMC showed signigicantly higher complex viscosity than CPC with 35% PAA(p<0.05).

Modeling of CPC/COLSS for YGN#3,4 simulator (영광#3,4호기 시뮬레이터의 노심보호 및 감시계통 모델링)

  • Kim, Dong-Uk
    • Journal of Institute of Control, Robotics and Systems
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    • v.4 no.3
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    • pp.400-405
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    • 1998
  • 본 논문에서는 한국형 원자력 발전소의 기준모델인 영광 3,4호기 운전원 훈련용 시뮬레이터의 모델링 절차와 ABB-CE 원전의 독특한 계통인 CPC/COLSS (Core protection Calculator/Core Operating Limit Supervisory System) 계통에 대한 모델링을 전개허고 있다. CPC/COLSS는 원자로를 포함하는 냉각재계통(NSSS)과 핵연료의 건전성을 보장하기위한 계통으로서 감시및 보호 과정에서의 계산을 디지털화시킴으로서 정확성과 함께 원자로의 안정성을 향상시킨 특색있는 계통이다. 따라서 영광 3,4호기 시뮬레이터에서는 CPC/COLSS 계통에 대한 정확한 모델링을 하여 시험을 통해 성능및 기능에 대한 검증을 마침으로서 CPC/COLSS 시뮬레이션 모델 개발이 성공적으로 되었고 영광 3,4호기 운전 특성에 맞는 시뮬레이터를 개발하였다.

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Chromate Removal from Wastewater using Micellar Enhanced Ultrafiltration and Activated Carbon Fibre Processes; Validation of Experiment with Mathematical Equations

  • Bade, Rabindra;Lee, Seung-Hwan
    • Environmental Engineering Research
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    • v.13 no.2
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    • pp.98-104
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    • 2008
  • In this study, chromate and cetylperidinium chloride (CPC) removal from artificial wastewater was monitored by using micellar enhanced ultrafiltration (MEUF) and activated carbon fibre (ACF) adsorption hybrid processes. For the efficient chromate removal, molar concentration of the CPC should be five times that of chromate and it should be at least one critical micelle concentration (CMC). The MEUF was found to be effective in the chromate removal while ACF in the CPC adsorption to produce chromate and CPC free effluents. The chromate and CPC removal was 99.8% from MEUF-ACF process. Effluent chromate concentration was exponentially correlated with molar ratio of CPC to chromate and pH.