• Korean Journal of Crystallography
• /
• v.7 no.1
• /
• pp.36-43
• /
• 1996

The crystal structure Tris(ethylenediamine)nickel(II)Dichromate has been determined by X-ray crystallography. Crystal data: a=8.268(2), b=13.865(2), c=14.921(2)Å, γ=102.04(2)°, V=1672.9(5)Å3, Z=4, Monocline, P21/b (space group No.=14), Dcalc=1.806 gcm-3, μ=24.05 cm-0.1. The intensity data were collected with Mo-Kα radiation(λ=0.7107Å) on an automatic four-circle diffractometer with a graphite monochromator. The structure was solved by Patterson method and refined by full matrix least-square methods using unit weights. The final R and S values were R=0.045, Rw=0.051, Rall=0.059 and S=2.171for 2248 observed reflections. The two carbon atoms of a ring of Ni(en)-ion were split into crossed four atoms. In consideration of α- and β-angles of two rings of a disordered ethylenediamine of Nien3-ion and the hydrogen bonds between Ni(en)3-cation and Cr2O7-anion, the configuration of Ni(en)3-ion is assumed to be disordered with Λδδδ and Λδδλ.

• Economic and Environmental Geology
• /
• v.42 no.5
• /
• pp.509-512
• /
• 2009

Powder diffraction patterns of the zeolite mesolite ($Na_{5.33}Ca_{5.33}Al_{16}Si_{24}O_{80}{\cdot}21.33H_2O$), with a natrolite framework topology were measured as a function of pressure up to 5.0 GPa using a diamond-anvil cell and a $200{\mu}m$-focused monochromatic synchrotron X-ray. Under the hydrostatic conditions mediated by pore-penetrating alcohol and water mixture, the elastic behavior of mesolite is characterized by continuous volume expansion between ca. 0.5 and 1.5 GPa, which results from expansion in the ab-plane and contraction along the c-axis. Subsequent to this anomalous behavior, changes in the powder diffraction patterns suggest possible reentrant order-disorder transition. The ordered layers of sodium- and calcium-containing channels in a 1:2 ratio along the b-axis attribute to the $3b_{natrolite}$ cell below 1.5 GPa. When the volume expansion is completed above 1.5 GPa, such characteristic ordering reflections disappear and the $b_{natrolite}$ cell persists with marginal volume contraction up to ca. 2.5 GPa. Further increase in pressure leads to progressive volume contraction and appears to generate another set of superlattice reflections in the $3c_{natrolite}$ cell. This suggests that mesolite in the pressure-induced hydration state experiences order-disorder-order transition involving the motions of sodium and calcium cations either through cross-channel diffusion or within the respective channels.

• Korean Security Journal
• /
• no.45
• /
• pp.221-242
• /
• 2015

Verification for the causality of factors affecting fear of criminal victim which has a bad influence on the senior's quality of life and directions to prevent the crimes against the elderly have been suggested. This study proves the applicability for fear of crime to old people especially based on risk interpretation model consisting of perceived risk of crime, behavioral response and fear of crime. Analysis results are as follows. First, disorder factors as social characteristics showed statistically significant influences on perceived risk of crime, behavioral response and fear of crime. Second, direct experienced crime victimization only affected perceived risk of crime while indirect experienced crime victimization had an effect on perceived risk of crime and fear of crime as well. Third, perceived risk of crime influenced fear of crime. Fourth, perceived risk of crime was concerned with fear of crime. Fifth, behavioral response was affiliated with fear of crime. These results reveal that risk interpretation model can be applied to senior's fear of crime. Moreover, disorder factor as social characteristic and experienced crime victimization as individual characteristic help the elderly perceive the risk of crime, bring behavioral response. Consequently, they play a role of factors affecting fear of crime. It is emphasized that support policy is required for the elderly who had experienced crime and stabilization of community environment if necessary to improve the quality of life.

• Journal of the Korean Association of Geographic Information Studies
• /
• v.24 no.1
• /
• pp.54-67
• /
• 2021

At present, CPTED projects are showing an effect such as reducing the anxiety of residents from crimes and improving the criminal environment about crimes through crime prevention. However, most of the CPTED programs have been implemented mainly to improve the physical environment without verifying systematically and empirically on the relationship between the program and improving the quality of life of residents and satisfaction level of residents etc. Accordingly, the objective of this study is to grope for a plan to apply CPTED to urban regeneration for improvement in the safety and life quality of residents using AHP and Visualizing The Mental Map. For this, We selected four case areas in Busan and then analyzed the dead zones of CPTED programs by visualizing the mental maps and heat maps of residents for case districts. As a result of evaluating the priority of CPTED program, installation of CCTVs and streetlights for prevention of crimes was found to be the most important elements. Result of analyzing mental map, the existing crime prevention facilities and CPTED programs were found to have resolved most of physical disorder. However, it showed that, for psychological factors which the residents feel such as social disorder, a number of dead zones exist.

• Proceedings of the Korean Society for Technology of Plasticity Conference
• /
• 2008.10a
• /
• pp.312-312
• /
• 2008

• Proceedings of the Materials Research Society of Korea Conference
• /
• 2003.03a
• /
• pp.85-85
• /
• 2003

최근 양자구속 구조 중에서 Stranski-Krastanow 모드에 의해 형성된 양자점에 관한 연구가 활발히 진행되고 있다 양자점은 단전자소자, 고밀도메모리, 발광소자와 같은 양자기능성 소자 제작을 위한 가장 유력한 후보로서 각광받고 있다. 그러나 평탄한 기판 위에서 양자점은 무질서한 형태로 성장되어 양자점의 정확한 위치 조절이 어렵다. 또한 양자점의 위치 조절을 위해서는 정밀한 리소그라피와 정밀한 성장조건이 요구된다. 본 연구에서는 최초로 저압 MOCVD를 사용하여 일차원 InAs 양자점을 GaAs 기판에 새겨진 V 홈 바닥을 따라 위치 조절하여 형성하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2014.06a
• /
• pp.29-30
• /
• 2014

현재 보령항은 진입항로에 있어 어청도에서 도선점에 이르기까지의 해역에 무질서하게 상존하는 어망 때문에 교통 환경이 매우 열악하다. 이에 따라 어청도 인근까지 항로를 연장하던가, 추천항로를 설정하여 대형선박의 통항을 어망이 없는 곳으로 유도하거나, 도선점을 어청도 인근으로 이전하는 등의 조치가 필요한 상황이다. 이에 기 수행된 신보령 1,2호기 해상교통안전진단 연구용역 사례를 토대로 진입항로에서의 안전성을 평가 한다.

• Proceedings of the Korean Society of Rheology Conference
• /
• 2002.11a
• /
• pp.151-154
• /
• 2002

No Abstract, See Full Text

• Journal of the KSME
• /
• v.34 no.6
• /
• pp.475-481
• /
• 1994

최근들어 가전회사를 중심으로 카오스 응용제품 개발에 박차를 가하고 있다. 인간의 주관적인 사고방식을 이용한 퍼지와 인간의 학습능력을 모방하는 유럴네트웍, 그리고 무질서속에서도 일 정한 질서를 찾아내고 단기예측이 가능한 카오스이론을 적용한 가전제품이 시장을 주도해나갈 것이다. 아직까지 우리나라에서는 카오스이론에 대한 학문적관심이 부족한 상태이며 일부 관심이 있는 사람에 의해 연구가 진행중인 것으로 알고 있다. 앞으로는 학계와 산업체에서 공동으로 카오스이론 연구와 제품개발에 노력을 해야 할 ㄸ라고 생각한다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2005.11b
• /
• pp.643-645
• /
• 2005

클러스터링은 무질서한 데이터들의 상호 연관 관계를 정의하고, 이를 통하여 보다 체계적으로 데이터를 군집화하는 것이다. 클러스터링을 적용한 웹 서비스 시스템은 비슷한 내용을 묶어 제공하기 때문에 사용자는 보다 효율적으로 정보를 제공받을 수 있다. 시멘틱 웹의 기반이 되는 온톨로지는 클러스터링을 위한 완벽한 입력 데이터를 제공한다. 본 논문은 온톨로지를 기반의 메타 데이터를 클러스터링 하기 위한 기법을 제안한다. 본 논문의 목적은 온톨로지 기반의 메타 데이터들의 유사성을 측정하기 위한 평가함수를 정의하고, 이러한 평가함수를 적용한 계층적 클러스터링 알고리즘을 연구하는 것이다.