신경망을 이용한 ATM 망에서 트래픽 제어에 관한 연구

서동신,김희철,임방택,나상동 조선대학교 동력자원연구소 1996 動力資源硏究所誌 Vol.18 No.1

A traffic control using back-propagation neural networks propose for the ATM communications networks. This paper proposes adaptive call admission control using back-propagation algorithm in link capacity control. In this paper, back-propagation algorithm is trained to estimate call admission rate from traffic load and link capacity, and link capacity assignment is optimized by back-propagation algorithm method which used learning rate and moment term. Therefore, simulation results yield efficient ATM traffic control which use neural networks training between quality of service(QOS) and traffic parameter in the number of class 1, 2 and evaluate call loss rate 10exp(-6) using the Erlang-Bequation by trained back-propagation neural networks.

文化生産 文學敎育論

方仁泰 한국초등국어교육학회 2001 한국초등국어교육 Vol.19 No.-

본고는 우리의 국어교육이 앞으로 문화생산을 지향해 문학교육은 그 핵심에 놓여야 한다고 보았으며, 이제까지의 이해와 감상 위주의 指能主義的관점에서 표현과 창작 위주의 文化生産的관점의 문학교욱으로 그 指向點이 바뀌어야 할 것을 주장하였다. 이러한 인식을 바탕으로 문화생산 문화교욱을 위한 원리로서 체험과 상상의 원리, 쾌락과 진실의 원리, 감동과 심미의 원리, 표현과 생산의 원리를 제시하였다. 그리고 그러한 원리에 바탕을 두고 문학교육의 方法을 두 가지 측면에서 이해와 감상, 표현과 창작으로 구분하여 살펴보았다. 이와 같은 논의는 문화생산 국어교육을 지향하는 것 (方仁泰,1999)으로서, 文字교육(2001a)과 言語교육 (方仁泰2001c), 그 하위 영역을 다룬 것으로 讀解교육 (方仁泰,2001b)과 作文교육을 함께 논의해야 그 일관된 논의를 확인할 수 있을 것이라 생각한다. Now Korean language deucation have to try for culture production from language art's education. And teaching literature is a core of Korean language education for culture production. Especially teaching literature has to transfer expression/creation form understanding/appeciation. And so I have discussed four principles that the first is experience and imagination, the second is pleasure and truth, the third is sympathy and appreciation of beauty, the last is expression and production. Next I have presented a few methods by two sides of understanding/appreciation and expression/ creation. To the end I would like to emphasized to have a unity of dixcussions. Because the nature of literature is harmony and equilibrium, it has to be consist of many literary elements structurally. This approach is bound for Korean language teaching for culture production. Next discussions ought to be continued to written language teaching(Bahng, 2001a), teaching composition and teaching comprehension(Bahng,2001b). This thesis have meaning and value, if the cultural ability of production leveled up, if culture have producted by teaching literature for culture production, and if Korean culture have developed and matured to one step.

Ensemble and Single-Molecule Spectroscopic Study on Excitation Energy Transfer Processes in 1,3-Phenylene-Linked Perylenebisimide Oligomers

Bahng, Hee Won,Yoon, Min-Chul,Lee, Ji-Eun,Murase, Yuichi,Yoneda, Tomoki,Shinokubo, Hiroshi,Osuka, Atsuhiro,Kim, Dongho American Chemical Society 2012 The Journal of physical chemistry B Vol.116 No.4

<P>1,3-Phenylene-bridged perylenebisimide dimer (<B>PBI2</B>) and trimer (<B>PBI3</B>) were prepared along with monomer reference (<B>PBI1</B>) using perylene imide-anhydride <B>5</B> as a key precursor. 3,3-Dimethylbut-1-yl substituents were introduced at the 2,5-positions of perylenebisimide (PBI) to improve the solubilities of <B>PBI</B> oligomers. Actually, no serious aggregation of <B>PBI2</B> and <B>PBI3</B> was detected in their dilute CH<SUB>2</SUB>Cl<SUB>2</SUB> solutions. Under these conditions, intramolecular electronic interactions among PBI chromophores have been revealed by measuring the photophysical properties at their ensemble and single-molecule levels. The excitation energy transfer times of <B>PBI2</B> (0.16 ps) and <B>PBI3</B> (0.60 ps) were determined from the two different observables, anisotropy depolarization, and singlet–singlet annihilation, respectively, which are considered as the incoherent Förster-type energy hopping (EEH) times as compared with the EEH time constant (1.97 ps) calculated on the basis of the Förster mechanism. The relatively short EEH times compared to similar PBI oligomers can be attributed to 1,3-phenylene linker, which assures a short distance between the chromophores and, as a consequence, makes it hard to treat the PBI unit as a point dipole. The limitation of point-dipole approximation to describe the PBI oligomers and additional through-bond type interactions can be attributed as the causes of the discrepancies in excitation energy transfer times. Considering these photophysical properties, we can suggest that 1,3-phenylene-linked PBI oligomers have potentials as molecular photonic devices including the artificial light-harvesting system.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpcbfk/2012/jpcbfk.2012.116.issue-4/jp208855u/production/images/medium/jp-2011-08855u_0003.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp208855u'>ACS Electronic Supporting Info</A></P>

Comparison of Design Preferences in the Hawaiian Shirt and Current Market

Bahng, Youngjin,Reilly, Andrew The Society of Fashion and Textile Industry 2018 한국의류산업학회지 Vol.20 No.4

The Hawaiian shirt, also known as the Aloha shirt, is a short-sleeved, colorful shirt with traditional Polynesian designs (e.g., hibiscus, fish) originating in Hawai'i. The shirt was selected for study because it is a unique garment that originated in the Hawaiian Islands in the late $19^{th}$ and $20^{th}$ centuries and marketed as a tourist product but was eventually adopted as appropriate residential clothing by the $mid-20^{th}$ century, however with different aesthetic details. Today, it is assumed by Hawaiian Island residents that tourists demonstrate poor taste when selecting a Hawaiian shirt. The purposes of this study are to examine the validity of the assumption that tourist taste and resident taste in Hawaiian shirts are different and to investigate the current Hawaiian shirt market change. For this study, 555 questionnaires were obtained from tourists and residents, and 10 Hawaiian shirt retailers/wholesalers participated in in-depth interviews. The results indicated that differences do exist between tourists' and residents' preferences for print designs and colorway. The market change of Hawaiian shirts was also recognizable in that an increasing number of tourists select Hawaiian shirts similar to resident customers, as part of their routine lives rather than as holiday or vacation garments. Other differences in Hawaiian shirt shopping behavior included the findings that tourists consider fabrication less important than resident customers who consider fabrication more (i.e., cotton 100%). By using both quantitative and qualitative methods, this study contributes to the fashion design and marketing field as well as help manufacturers and retailers with their merchandise and distribution plans.

Development of a low-energy beam transport system at KBSI heavy-ion accelerator

Bahng, Jungbae,Lee, Byoung-Seob,Sato, Yoichi,Ok, Jung-Woo,Park, Jin Yong,Yoon, Jang-Hee,Choi, Seyong,Won, Mi-Sook,Kim, Eun-San Elsevier 2015 Nuclear Instruments & Methods in Physics Research. Vol.769 No.-

<P><B>Abstract</B></P> <P>The Korea Basic Science Institute has developed a heavy ion accelerator for fast neutron radiography [1]. To meet the requirements for fast neutron generation, we have developed an accelerator system that consists of an electron cyclotron resonance ion source (ECR-IS), low-energy beam transport (LEBT) system, radio-frequency quadrupole (RFQ), medium-energy beam transport system, and drift tube linac. In this paper, we present the development of the LEBT system as a part of the heavy ion accelerator system, which operates from the ECR-IS to the RFQ entrance.</P>

Two Stage Damage Identification by Combination of Damage Indicator Method and Neural Networks

Bahng, Eun-Young 동양대학교 2000 동양대학교 논문집 Vol.6 No.1

본 논문은 토목구조물의 부재단위의 손상도 추정법에 관한 내용이다. 본 논문에서 제시되는 방법은 과도한 미지수로 인한 문제를 피하기 위하여 2단계로 이루어진다. 먼저 손상지수법을 이용한 손상부재 탐색절차와 신경망을 사용한 손상정도 추정절차로 단계화 되어있다. 모드자료의 불확실성은 신경망의 노이즈첨가 학습을 적용하여 최소화하였으며, 모드형상 자료의 불완전한 측정문제를 극복하기 위하여 부분구조법 개념을 도입하였다. 제시된 방법의 효율성을 보이기 위해 트러스 구조물에 대한 예제해석을 수행하여 2단계 방법이 손상정도를 추정하는데 정확도를 향상시킴을 확인하였다.

MICOM-Compatible ±4 1/2 Digit Analog to Digital Converter for Digital Multimeter Applications

Bahng, Sam Yong,Lee, Seong Ho,Choi, Eung Ju,Baek, Seung Bum,Kim, Suk Ki 대한전자공학회 1991 ICVC : International Conference on VLSI and CAD Vol.2 No.1

This paper reports a dual slope analog-to-digital To achieve high accuracy and high resolution, the converter working with a microcontroller to perform gain of integrator amplifier has to be high enough, complete digital multi-meter(DMM) functions. Auto-zeroing and X10 switched capacitor functions can be performed simultaneously to reduce offset errors as well as to improve the resolution of the UMM.

Trench Formation on Ion Implanted SiC Surfaces after Thermal Oxidation

Bahng, Wook,Song, Geun Ho,Kim, Nam Kyun,Kim, Sang Cheol,Kim, Hyoung Wook,Seo, K.S.,Kim, Eun Dong Trans Tech Publications, Ltd. 2005 Materials science forum Vol.483 No.-

<P>The effects of the damage induced during ion implantation on the surface roughening and oxide growth rate were investigated. Using several scheme of doses and acceleration energies, it is found that the amount of the dose predominantly produce damage rather than the acceleration energy, especially near the surface region. It was also found that the damage affects not only the oxide growth rate but also the surface roughening during high temperature annealing. The edge of highly implanted area may have higher doping concentration due to the vicinal side wall effect of the thick oxide mask for ion implantation. It was confirmed by the trench formation after thermal oxide remove.</P>

Modification of Surface Layer during High Temperature Annealing and its Effects on the SiC Diode Characteristics

Bahng, Wook,Cheong, Hui Jong,Kang, In Ho,Kim, Seong Jin,Kim, Sang Cheol,Joo, Sung Jae,Kim, Nam Kyun Trans Tech Publications, Ltd. 2007 Materials science forum Vol.556 No.-

<P>We have investigated the influence of surface modification on the electrical properties of SiC diodes. Schottky diodes (SBDs) as well as PiN diodes were fabricated on n-type SiC substrate with an epilayer, and electrically characterized before and after high temperature annealing, and after removing the surface modified layer, respectively. The devices annealed without graphite cap layer showed ohmic behavior. The surface layer was modified to a conductive layer possibly due to the preferred sublimation of Si species. In order to confirm the existence of modified surface conductive layer, diode was fabricated on the same substrate and electrically characterized after removing 30nm-thick damaged layer by ICP-RIE. The leakage current reduced dramatically, as much as 7 orders of magnitude. The PiN diodes fabricated on the damaged surface layer showed the reverse leakage current and the breakdown voltage of 50mA and 1250V, respectively. While those of the diode fabricated after removing the damaged surface layer were 200nA at the breakdown voltage of 2100V, respectively.</P>

Molecular engineering and solvent dependence of excitation energy hopping in self-assembled porphyrin boxes

Bahng, Hee Won,Kim, Pyosang,Sung, Young Mo,Maeda, Chihiro,Osuka, Atsuhiro,Kim, Dongho The Royal Society of Chemistry 2012 Chemical communications Vol.48 No.35

<P>It has been demonstrated that the direction and magnitude of transition dipole moments, and hence rates in the excitation energy hopping in the self-assembled porphyrin boxes can be tuned by insertion of ethynyl groups as well as the dielectric constant of solvent.</P> <P>Graphic Abstract</P><P>Excitation energy hopping in self-assembled porphyrin boxes. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cc30834g'> </P>