[카테고리:] 미분류

◈ Title: A. Einstein left us two unresolved issues
◈ Speaker : Prof.  Kwon, O’Dae (POSTECH)
◈ Date & Time : Friday, April 22, 2011 (14:00pm ~ 15:30pm)
◈ Place : LG Research Building, Room #101
◈ Abstract : 
• In 1919 when Einstein addressed “Religion of fear>Moral God>Cosmic God”, nobody was openly against.
• In 1926 he said, “QM is certainly imposing. But an inner voice tells me that it is not yet the real thing… He is not playing at dice[cf. Unification issue]”, many scientists    were against. That is the first issue and NOW some are working on it.
• In 1930 when Einstein RE-addressed “Religion of fear>Moral God>Cosmic God”, many Christians in USA were openly against.
• In 1939 he said, “Science without religion is lame, religion without science is blind.” Also said, “Science not only purifies the religious impulse of the dross of its anthropomorphism but also contributes to a religious spiritualization of our understanding of life.” This is the second issue emerging in 21st C. • “It is clear to me that [this] religious paradise of youth was a first attempt to liberate myself from the “only personal”: This urge stayed with him all his life.

◈ Title : PRAM: Structure, Operations, and Applications
◈ Speaker : Principal engineer. Sanghoan Chang(PRAM Development Team/Samsung Electronics Co.)
◈ Date & Time : Friday, March 4, 2011 (3:50pm ~ 5:20pm)
◈ Place : LG Research Building, Room #101
◈ Host : Prof.  Sungjoo, Yoo (Tel. 2379)
◈ Abstract : As the scaling of memory technology approaches the physical limit of memory operation, various types of memories are proposed to extend the scaling by several generations. Among those memories, PRAM has been widely studied in industries as well as in academies owing to its scalability.
In this seminar, basic concepts of PRAM are introduced including cell structure and operation principles. Then, the characteristics of PRAM are compared with those of other various memories like Flash memory and DRAM. As PRAM has been focused for its scalability, the challenges in scaling and the expected properties of  future PRAM cell are discussed. Finally, the examples of current and  the expected future PRAM applications are presented. 

◈ Title : Characterization of Molecular Transistors and Nanostructured Optoelectronic Devices
◈ Speaker : Prof.  Takhee Lee (Gwangju Institute of Science and Technology)
◈ Date & Time : Friday, March 11, 2011 (3:00pm ~ 4:30pm) (time is changed)
◈ Place : LG Research Building, Room #105 (classroom is changed)
◈ Host : Prof.  Haewook, Han (Tel. 2240)
◈ Abstract :
 The idea of utilizing functional molecules as the electronic components in future ultrahigh-density electronic devices has generated tremendous attention. Obtaining transistor action  from molecular orbital control has been the outstanding challenge of the field of molecular electronics nearly since its inception. In this talk, I will demonstrate a direct electrostatic modulation of orbitals in a molecular transistor configuration, with both effective gate control and enhanced resonant coupling of the orbitals to the source and drain electrodes [1]. In the second part of the talk, our recent research on the organic non-volatile memories will be discussed [2]. And, if time is allowed, I will also briefly discuss other research results on nanoscale logic circuits [3] and graphene-electrode optoelectronic devices [4].

References:
[1] Hyunwook Song et al., Nature 462, 1039 (2009).
[2] (a) Tae-Wook Kim et al., Adv. Mater. 21, 2497 (2009), Cover picture article;
     (b) Byungjin Cho et al., Adv. Mater. 22, 1228 (2010), Cover picture article;
     (c) Yongsung Ji et al., Adv. Mater. 22, 3071 (2010), Cover picture article;
     (d) Sunghun Song et al., Adv. Mater. 22, 5048 (2010), Cover picture article
[3] Gunho Jo et al., Adv. Mater. 21, 2156 (2009), Cover picture article.
[4] (a) Sangchul Lee et al., Adv. Mater. 23, 100 (2011);
     (b) Yung Ho Kahng et al., Nanotechnology 22, 045706 (2011) Cover article;
     (c) Gunuk Wang et al., Adv. Mater. 23, 755 (2009), Cover picture article.

◈ Title : Illumination industry and LED light source
◈ Speaker : Prof. Dae–Hee, Park (Wonkwang Unversity)
◈ Date & Time : Friday, March 18, 2011 (10:30am ~ 12:00) (time is changed)
◈ Place : LG Research Building, Room #101
◈ Host : Prof.  Haewook, Han (Tel. 2240)
◈ Abstract : In this presentation, Current status and key technologies of illumination industry will be reviewed. Furthermore, trends of  general light source  and LED light sources will also be introduced as below;
  – Illumination Industry
  – General Light Source
  – LED Light Source

◈ Title : Low-temperature atmospheric-pressure plasma: Effects on cancer cells and on tooth whitening
◈ Speaker : Prof.  Gyoocheon Kim (college of dentistry, Pusan National University)
◈ Date & Time : Friday, March 4, 2011 (2:00pm ~ 3:30pm)
◈ Place : LG Research Building, Room #101
◈ Host : Prof.  Jae Koo, Lee (Tel. 2083)
◈ Abstract : Non-thermal air plasma was investigated in cell-death of G361 melanoma and SCC25 oral cancer cells, targeted by antibody-conjugated gold nanoparticles. Although plasma alone is effective in killing cancer cells, it also adversely affects normal cells during the treatment process. For enhanced effects, cells were pretreated with gold nanoparticles and cancer-specific antibodies before plasma treatment. The nanoparticles, taken up by the cancer cells, are stimulated by the plasma, resulting  in the observed increase in death rate. The selectivity of this kill-process is achieved by conjugating the gold nanoparticles with anti-focal adhesion kinase (FAK), epidermal growth factor receptor  (EGFR) and -transferrin receptor (TFR) antibodies, conjugates that can bind specifically to cancer cells. The killing efficiency of the plasma treatment in the presence of conjugates was amplified about 18-fold compared to the effect in their absence. Therefore, this technique shows promise as a therapy for treating cancer selectively and effectively. We have also demonstrated that plasma can be used for bleaching of teeth: A low-temperature, atmospheric-pressure helium plasma jet device, in conjunction with hydrogen peroxide (H2O2), was developed for this purpose. All teeth, sectioned sagittally into halves, were assigned randomly to   either an experimental group or a control group. The former was treated with H2O2 (28%, 20 mL  every 30 seconds) plus plasma (5 W) for 10 minutes, while the control group was treated with H2O2 alone for the same duration. Removal of the tooth-surface protein was demonstrated by scanning electron microscopy and by Ponceau staining. The production of hydroxyl radicals (·OH) was measured by spin-trapping, using electron-spin resonance (ESR) spectroscopy. Combining plasma and H2O2 was found to improve the bleaching efficacy 3-fold compared with H2O2 alone,  tooth-surface proteins being noticeably removed in the former case. When a piece of tooth was added as a catalyst to a solution of H2O2, production of ·OH after plasma treatment was ca. twice greater than when using H2O2 alone. We conclude that the improvement of tooth bleaching induced by plasma is due to the removal of the surface proteins and to increased ·OH production.

◈ Title: Introduction of POSCO ICT and Desired Talents in Company
◈ Speaker : Dr. Seung–Gap, Choi (POSCO  ICT)
◈ Date & Time : Friday, March 25, (14:00am ~ 15:30)
◈ Place : LG Research Building, Room #101
◈ Host : Prof.  Sangchul, Won (Tel. 2221)
◈ Abstract : Recently, engineering company POSCON and IT company POSDATA were combined together to follow the big trends  of convergence technology. The first part of this seminar will give a brief introduction of the new company named POSCO ICT and its core technologies in the field of IT, control, instrumentation and those convergencies. In the second part, new standard(but not so new!) of talents are to be dealt with which are required from the university in the age of convergence.

▣ Title : Memories: Challenges & Sollutions – From the perspective of signal processing

▣ Abstract : Refer to the attach File.

▣ Speaker : 공준진 마스터 (삼성전자) / Master. Junjin Kong (Samsung Electronics)

▣ Time : 11. 26(금) 오후 2:40~3:50 / 14:40~15:50, November 26 (Fri)

▣ Place : LG동 강당 (101호) / Room #101, LG Research Bldg.

▣ Contact : 양경철 교수 / Prof. Kyeongcheol Yang (T.279-2239) 

▣ Language : Korean

▣ 일시: 12월 14일 화요일, 오후 6:15~7:45

▣ 장소: LG동 105호

▣ 연사: 최원태 수석연구원 (삼성모바일디스플레이 디바이스 솔류션팀)

▣ 제목: 모바일소자용 부품의 핵심기술소개

▣ 초청자: 박홍준 교수

▣ 일   시: 12월 17일 (금), 오후 2:45~4:15

▣ 장   소: LG동 105호

▣ 제   목: Can Si replace sapphire as a substrate of GaN based films? 

▣ 연   사: 김 준 연 수석연구원 (삼성종합기술원)

▣ 초청자: 권 오 대 교수

“Technology Evolution towards IMT-Advanced”

-. 연 사 : 김영균 전무 (삼성전자)

-. 일 시 : 2008년 11월 21일 (금) 오후 2:45 ~ 4:15

-. 장 소 : LG동 105호

-. 초청자 : 양 경 철 교수 (T.2239)

Abstract

We are living in a convergence era with a full blossom of mobile communication devices, inter-net protocol (IP), computing and broadcasting. 4G (in ITU-word, IMT-Advanced) technology roadmap is generally conceived to be two major paths, namely a conventional cellular-based path (3G, 3G LTE and LTE-Advanced) and an IP –based path (IEEE 802.16e (mobile WiMAX) and 802,16m evolution). ITU-R finally allocated global broadband spectrum for IMT services out of WRC-07 and is undertaking a major milestone of MT-Advanced standardization. Until the last October Seoul meeting, WP 5D has completed IMT-Advanced requirements and evaluation doc-uments. And both 3GPP and IEEE 802.16 plan to submit their IMT-Advanced technology proposal by mid of 2009. And IMT-Advanced Specifications plan to be completed 1Q 2011,
In Korea, mobile WiMAX service will be fully deployed in major cities by end of 2008, and in US, Sprint-Nextel 4G (mobile WiMAX) network is being deployed nation-wide in a few years with a new open access concept. In open access, a proliferation of many different mobile devices is allowed to be connected to the network.
In summary, both 3G LTE-Advanced and IEEE 802.16m evolution are promising standard can-didates for IMT-Advanced. Standards development may follow the ITU time schedule. However, still new business applications and service developments are very much needed for differentiat-ing IMT-Advanced from 3G.