• Title, Summary, Keyword: ABC

Search Result 591, Processing Time 0.034 seconds

Development of ABC based Management Resource Analysis System - Centering Ground Government Investment Corporation - (활동기준원가 개념에 기반한 경영자원투입분석 시스템 개발 - 정부투자기관의 구축사례를 중심으로 -)

  • Baek Dong-Hyun;Sul Won-Sik
    • Journal of the Society of Korea Industrial and Systems Engineering
    • /
    • v.28 no.2
    • /
    • pp.81-93
    • /
    • 2005
  • The main purpose of this paper Is to develop the Management Resource Analysis System for KOTRA which is based on Activity Based Costing(ABC). Because the products and services of KOTRA are exclusive and include a government subsidy, we need develop a different system from the private firm's ABC system. The Management Resource Analysis System that we propose is embodied using JAVA and JSP within an UNIX environment and developed as a Web-enabling base. It is expected for aiding a manager's decision-making such as resource inquiry, standard resource analysis, estimating the ratio of a government subsidy, case based reasoning, what-if analysis. The results of this paper suggest what points are to be considered when we apply ABC for Government Investment Corporation.

Optical Phonon Mixing in ABC Trilayer Graphene with a Chemically Broken Inversion Symmetry

  • Park, Gwang-Hui;Ryu, Sun-Min
    • Proceedings of the Korean Vacuum Society Conference
    • /
    • /
    • pp.180.1-180.1
    • /
    • 2014
  • 이중층 그래핀(graphene)의 한쪽 표면에 전하를 주입하면 반전 대칭(inversion symmetry)이 깨지며 라만-비활성 진동모드가 활성화되면서 라만 G-봉우리 부근에 새로운 봉우리가 나타난다고 알려져 있다. 삼중층 그래핀은 그래핀이 적층되는 방식에 따라 ABA (Bernal), ABC (rhombohedral) 그래핀으로 나뉘며, ABC 그래핀은 ABA와는 달리 반전 대칭성을 가지고 있다. 본 연구에서는 화학적인 방법을 이용하여 ABC 그래핀의 반전 대칭을 제어하고 그에 따른 라만 스펙트럼의 변화를 탐구하였다. ABA 그래핀과는 달리 이중층 그래핀과 ABC 그래핀에서는 저진공 열처리 또는 요오드 흡착반응을 한 후에 G-봉우리 부근에서 새로운 봉우리가 나타나는 것을 관찰하였고, 전하밀도 정도가 증가 할수록 G-봉우리와 새로운 봉우리의 위치 차이는 증가하는 것을 관찰하였다. 물과 메탄올에 의한 세척 반응으로부터 열처리는 복층 그래핀과 기판 계면에 그리고 요오드 흡착은 그래핀의 상단표면에 잉여 전하를 유발하여 반전 대칭을 깨트린다는 사실을 확인하였다. 또한 G-봉우리와 새로운 봉우리의 진동수 차이가 반전 대칭을 유발한 전하밀도의 그래디언트에 대한 척도가 될 가능성을 제시하였다.

  • PDF

1.9-GHz CMOS Power Amplifier using Adaptive Biasing Technique at AC Ground

  • Kang, Inseong;Yoo, Jinho;Park, Changkun
    • Journal of information and communication convergence engineering
    • /
    • v.17 no.4
    • /
    • pp.285-289
    • /
    • 2019
  • A 1.9-GHz linear CMOS power amplifier is presented. An adaptive bias circuit (ABC) that utilizes an AC ground to detect the power level of the input signal is proposed to enhance the linearity and efficiency of the power amplifier. The ABC utilizes the second harmonic component as the input to mitigate the distortion of the fundamental signal. The input power level of the ABC was detected at the AC ground located at the VDD node of the power amplifier. The output of the ABC was fed into the inputs of the power stage. The input signal distortion was mitigated by detecting the input power level at the AC ground. The power amplifier was designed using a 180 nm RFCMOS process to evaluate the feasibility of the application of the proposed ABC in the power amplifier. The measured output power and power-added efficiency were improved by 1.7 dB and 2.9%, respectively.

A Molecular Dynamics Simulation on the Self-assembly of ABC Triblock Copolymers.3. Effects of Block Composition in Asymmetric Triblock Copolymers

  • Ko, Min-Jae;Kim, Seung-Hyun;Jo, Won-Ho
    • Fibers and Polymers
    • /
    • v.4 no.1
    • /
    • pp.15-19
    • /
    • 2003
  • The self-assembly of asymmetric ABC triblock copolymers in the ordered structure is investigated using an isothermal-isobaric molecular dynamics simulation. Unlike symmetric A BC triblock copolymers, more fascinating mophologies are observed in asymmetric ones because of a larger difference of incompatibility between the components. Various modes of self-assembly in assymmetric ABC triblock copolymers are also observed depending on the block composition. When the composition of block A Is changed from 0.125: to 0.25 at the same $f_B$ : 0.25, the morphological transition from the “cylinder in cylinder” to “cylinders at cylinder” structure is observed in the simulation. In the case of ABC triblocks with $f_B$=0.5, a lamellar-type structure is changed to a cylinder-type structure with increasing the length of block A. When the midblock length increases further to $f_B$=0.625, the “spheres on cylinder” structure is observed in both the $A_{10}$$B_{50}$$C_{20}$ and $A_{20}$$B_{50}$$C_{10}$ triblocks. From these results, the phase diagram of ABC triblock copolymers can be constructed.

Secondary Aneurysmal Bone Cyst in a Craniofacial Fibrous Dysplasia: Case Report

  • Lee, Hyun-Seok;Koh, Young-Cho;Roh, Hong Gee;Park, Hyung Kyu;Kim, Soo Yeon
    • Brain Tumor Research and Treatment
    • /
    • v.6 no.2
    • /
    • pp.86-91
    • /
    • 2018
  • Aneurysmal bone cyst (ABC) is a rare non-neoplastic bone lesion that involves mostly the long bones and vertebrae and may occur very rarely in the craniofacial bones. ABCs may occur as secondary bony pathologies in association with various benign and malignant bone tumors and with fibrous dysplasia (FD). FD is a common non-neoplastic bony pathology mostly affecting craniofacial bones. Secondary ABC occurring in craniofacial FD is extremely rare, with only approximately 20 cases reported in the literature to date. Here, we report on a case of secondary ABC in a 25-year-old woman who has had a craniofacial deformity for over 10 years and who presented to us with a rapidly growing painful pulsatile mass in the right frontal region that began over 2 months prior to admission. On thorough examination of computed tomography and magnetic resonance imaging brain scans taken at two-month interval, an aggressive, rapidly enlarging ABC, arising from the right frontal FD, was diagnosed. The patient underwent preoperative embolization followed by gross total resection of the ABC and cranioplasty. The 6-month follow up showed no recurrence of the ABC, nor was any progression of the FD noticed.

Hybrid artificial bee colony-grey wolf algorithm for multi-objective engine optimization of converted plug-in hybrid electric vehicle

  • Gujarathi, Pritam K.;Shah, Varsha A.;Lokhande, Makarand M.
    • Advances in Energy Research
    • /
    • v.7 no.1
    • /
    • pp.35-52
    • /
    • 2020
  • The paper proposes a hybrid approach of artificial bee colony (ABC) and grey wolf optimizer (GWO) algorithm for multi-objective and multidimensional engine optimization of a converted plug-in hybrid electric vehicle. The proposed strategy is used to optimize all emissions along with brake specific fuel consumption (FC) for converted parallel operated diesel plug-in hybrid electric vehicle (PHEV). All emissions particulate matter (PM), nitrogen oxide (NOx), carbon monoxide (CO) and hydrocarbon (HC) are considered as optimization parameters with weighted factors. 70 hp engine data of NOx, PM, HC, CO and FC obtained from Oak Ridge National Laboratory is used for the study. The algorithm is initialized with feasible solutions followed by the employee bee phase of artificial bee colony algorithm to provide exploitation. Onlooker and scout bee phase is replaced by GWO algorithm to provide exploration. MATLAB program is used for simulation. Hybrid ABC-GWO algorithm developed is tested extensively for various values of speeds and torque. The optimization performance and its environmental impact are discussed in detail. The optimization results obtained are verified by real data engine maps. It is also compared with modified ABC and GWO algorithm for checking the effectiveness of proposed algorithm. Hybrid ABC-GWO offers combine benefits of ABC and GWO by reducing computational load and complexity with less computation time providing a balance of exploitation and exploration and passes repeatability towards use for real-time optimization.

DIAGNOSTIC VALIDITY OF THE K-ABC AND THE K-LDES FOR CHILDREN WITH LEARNING DISORDER AND LEARNING PROBLEM (학습장애를 가진 아동에 대한 K-ABC와 K-LDES의 진단적 타당도)

  • Shin, Min-Sup;Cho, Soo-Churl;Kim, Boong-Nyun;Jeon, Sun-Young
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
    • /
    • v.14 no.2
    • /
    • pp.209-217
    • /
    • 2003
  • Object:This study examined the diagnostic validity of the K-ABC and the K-LDES for identifying the cognitive deficits and the learning difficulty of children with learning disorder and to diagnose the learning disorder. Method:The clinical group consisted of 15 children with learning disorder or attention deficit hyperactivity disorder accompanying learning problem(LP) and 14 children with attention deficit hyperactivity disorder. They were diagnosed either learning disorder or attention deficit hyperactivity disorder based on DSM-IV criteria by child psychiatrists and clinical psychologists visiting Seoul National University Children’s Hospital. The normal group was composed of 15 children be going to an elementary school. All groups were between the age of 7 and 12. The K-ABC was administered to the clinical and the normal group. The K-LDES was also administered to mothers of all groups. Result:There were no significant differences on sequential, simultaneous, mental processing subscales of the K-ABC in three groups. However, The LP group showed slightly lower scores on Achievement scale and significant low scores on Reading/Decoding than the other groups. On K-LDES, LP group showed significant low scores on Listing, Thinking, Reading, Writing, Spelling, Mathematical calculation, Learning quotient(LQ) than the other groups. Also there were significant correlations between K-ABC and K-LDES subscales. Conclusion:The result of present study showed that the K-ABC and the K-LDES are a valid and effective instruments for evaluating and diagnose the learning disorder.

  • PDF

Fall Risk Analysis of Elderly Living in the City (도시 거주 노인의 낙상 위험요인 분석)

  • Kim, Sang-hee;Kim, Seok-kyu;Kang, Chae-young;Kim, Su-jeong;Lee, Hyun-ju
    • Journal of Digital Convergence
    • /
    • v.14 no.5
    • /
    • pp.485-491
    • /
    • 2016
  • The purpose of this study was to compare of the fall risk factors for elderly in the city. 62 people aged 65 years or older were classified as fallers and nonfallers based on experience of their falls in the previous year. By comparing the difference between the groups via evaluations of general characteristics, health related behavior and chronic disease, balance-related psychological (K-ABC) and physical measurement (BBS), depression (SGDS), and the correlations between the significant differences in variables were identified. According to the results, K-ABC, BBS, and SGDS are statistically significant differences between fallers and nonfallers (P<0.05). Also it has positive correlations between BBS and K-ABC (r=0.499) whereas negative correlation between K-ABC and SGDS(r=-0.472).

THE EFFECT OF THE REMOVAL OF CHONDROITIN SULFATE ON BOND STRENGTH OF DENTIN ADHESIVES AND COLLAGEN ARCHITECTURE (비교원성 단백질이 상아질 접착제의 결합강도와 교원질의 형태에 미치는 영향)

  • Kim, Jong-Ryul;Park, Sang-Jin;Choi, Gi-Woon;Choi, Kyoung-Kyu
    • Restorative Dentistry and Endodontics
    • /
    • v.35 no.3
    • /
    • pp.211-221
    • /
    • 2010
  • Proteoglycan is highly hydrophilic and negatively charged which enable them attract the water. The objective of study was to investigate the effects of Proteoglycan on microtensile bond strength of dentin adhesives and on architecture of dentin collagen matrix of acid etched dentin by removing the chondroitin sulphate attached on Proteoglycan. A flat dentin surface in mid-coronal portion of tooth was prepared. After acid etching, half of the specimens were immersed in 0.1 U/mL chondroitinase ABC (C-ABC) for 48 h at $37^{\circ}C$, while the other half were stored in distilled water. Specimens were bonded with the dentin adhesive using three different bonding techniques (wet, dry and re-wet) followed by microtensile bond strength test. SEM examination was done with debonded specimen, resin-dentin interface and acid-etched dentin surface with/without C-ABC treatment. For the subgroups using wet-bonding or dry-bonding technique, microtensile bond strength showed no significant difference after C-ABC treatment (p > 0.05). Nevertheless, the subgroup using rewetting technique after air dry in the Single Bond 2 group demonstrated a significant decrease of microtensile bond strength after C-ABC treatment. Collagen architecture is loosely packed and some fibrils are aggregated together and relatively collapsed compared with normal acid-etched wet dentin after C-ABC treatment. Further studies are necessary for the contribution to the collagen architecture of noncollagenous protein under the various clinical situations and several dentin conditioners and are also needed about long-term effect on bond strength of dentin adhesive.