Exploration of Applying a Theory-Based User Classification Model to Inform Personalised Content-Based Image Retrieval System Design

Haiming Liu,Dawei Song,Paul Mulholland 한국HCI학회 2016 한국HCI학회 학술대회 Vol.2016 No.1

To better understand users and create more personalised search experiences, a number of user models have been developed, usually based on different theories or empirical data study. After developing the user models, it is important to effectively utilise them in the design, development and evaluation of search systems to improve users’ overall search experiences. However there is a lack of research has been done on the utilisation of the user models especially theory-based models, because of the challenges on the utilization methodologies when applying the model to different search systems. This paper explores and states how to apply an Information Foraging Theory (IFT) based user classification model called ISE to effectively identify user’s search characteristics and create user groups, based on an empirically-driven methodology for content-based image retrieval (CBIR) systems and how the preferences of different user types inform the personalized design of the CBIR systems.

Sedimentary characteristics and palaeoclimatic significance of glauberite in Paleocene lacustrine deposits of the Jiangling Depression, central China

Xiaocan Yu,Chenglin Liu,Chunlian Wang,Jiuyi Wang,Haiming Xu,Haonan Li 한국지질과학협의회 2018 Geosciences Journal Vol.22 No.3

The Paleocene sedimentary sequence in the Jiangling Depression was deposited in a salt lake environment. Based on detailed core observation of four drillholes in the Jiangling Depression, a study of sedimentary characteristics of glauberite in Paleocene lacustrine deposits was conducted through thin section petrography, X-ray diffraction, scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). This study has revealed five types of geological occurrences and six types of profile distribution features of glauberite. On the basis of petrological and mineralogical characteristics, we propose that the glauberite is mainly formed by crystallization from saturated sulfate solution and by ion exchange between sulfate solution and calcium-bearing pore solution. Glauberite mainly occurs in the late stage of Paleocene, when brine is relatively highly concentrated. Replacement of gypsum by glauberite is subordinate. The depositional model of glauberite is also discussed. The sulphur isotopic values δ34S) and the strontium ratios (87Sr/86Sr) of the sulphate suggest a non-marine brine supply. The profile distribution features of glauberite contribute to a better understanding of the past climate change. The glauberite in Late Paleocene is frequently interbedded with dolomite, anhydrite, halite or thenardite, suggesting fluctuation of lake water salinity and climate. Trace element compositions of the mudstones imply the reducing condition and fluctuating salinity. The Homogenization temperatures and hydrogen and oxygen isotopic values (δDSMOW and δ18OSMOW) in halite and thenardite inclusions further indicate that in Paleocene the temperature was relatively high and fluctuant. Moreover, the palaeoclimate was drier in the late stage of Late Paleocene, though the temperature was cooler/lower.

The Geochemical and Zircon Trace Element Characteristics of A-type Granitoids in Boziguoer, Baicheng County, Xinjiang

윤경무,유춘화,박정현,소흥곤,양해도,서해명,왕군,Yin, Jingwu,Liu, Chunhua,Park, Jung Hyun,Shao, Xingkun,Yang, Haitao,Xu, Haiming,Wang, Jun The Korean Society of Economic and Environmental G 2013 자원환경지질 Vol.46 No.2

신장 위구르 자치구 바이청현 보즈구얼 지역의 A형 화강암체는 타림지대의 북쪽 끝과 동서쪽 방향의 알칼리 관입암대에 접하여 위치해 있다. 이 화강암체는 추휘석(aegrine)이나 아페소나이트(arfvedsonite)-석영-알칼리장석 섬장암, 또는 아페소나이트-알칼리장석 화강암, 흑운모-알칼리장석 섬장암으로 구성되며, 주요광물로는 알바이트(albite), K-장석, 석영, 아페소나이트(arfvedsonite), 추휘석, 시데로필라이트(siderophyllite) 등이 있으며 부성분 광물로는 지르콘(zircon), 파이로클로르(pyrochlore), 토라이트(thorite), 형석, 모나자이트(monazite), 바스네사이트(bastnaesite), 제노타임(xenotime), 아스트로필라이트(astrophyllite) 등이 있다. 이 알칼리 화강암체는 67.32%의 평균값을 갖는 $SiO_2$를 포함하고 평균 11.14%의 높은 $Na_2O+K_2O$(9.85~11.87%) 조성을 보이며 이 중 $K_2O$는 평균 4.73%의 조성을 보인다. $K_2O/Na_2O$의 비는 0.31~0.96 사이이며 $Al_2O_3$는12.58%부터 15.44%사이로 포함되고 총 $FeO^T$함량은 2.35~5.65%이내이다. CaO, MgO, MnO, $TiO_2$의 함량은 낮은 것으로 관찰된다. 희토류원소의 총량은 평균 $77{\times}10^{-6}$으로 비교적 높게 나타나고 경희토원소는 농축되어 있지만 중희토원소는 Eu원소의 부(-)의 이상과 함께 상대적으로 결핍되는 특징을 가진다. 또한 알칼리 화강암체의 chondrite-normalized 희토류원소의 패턴은 오른쪽으로 기울어진 갈매기형태를 보인다. Zr는 평균 $594{\times}10^{-6}$의 함량을 보이며 Zr+Nb+Ce+Y는 평균 $1362{\times}10^{-6}$의 함량을 나타낸다. 또한 이 알칼리 화강암체는 높은 HFSE(Ga, Nb, Ta, Zr, Hf)함량과 낮은 LILE(Ba, K, Sr)함량을 보인다. Nb/Ta의 비는 평균 16.5이며 Zr/Hf의 비는 평균 36.80이다. 지르콘은 경희토원소에서 결핍되고 중희토원소에서 농축되어있다. 지르콘의 chondrite-normalized 희토류원소는 Eu원소의 강한 부(-)의 이상과 함께 왼쪽으로 기울어진 갈매기형태를 보인다. 보즈구얼지역의 A타입 화강암체는 A1타입의 화강암과 유사한 특징을 나타낸다. 화강암질 마그마의 평균온도는 $832{\sim}839^{\circ}C$이며 보즈구얼 지역의 A타입 화강암체는 지각과 맨틀의 혼합양상을 보이며 고온, 무수, 낮은 산소의 퓨개시티(fugacity) 환경을 가진 판 내부의 비조산대에서 생성되었을 가능성이 있다. The Boziguoer A-type granitoids in Baicheng County, Xinjiang, belong to the northern margin of the Tarim platform as well as the neighboring EW-oriented alkaline intrusive rocks. The rocks comprise an aegirine or arfvedsonite quartz alkali feldspar syenite, an aegirine or arfvedsonite alkali feldspar granite, and a biotite alkali feldspar syenite. The major rock-forming minerals are albite, K-feldspar, quartz, arfvedsonite, aegirine, and siderophyllite. The accessory minerals are mainly zircon, pyrochlore, thorite, fluorite, monazite, bastnaesite, xenotime, and astrophyllite. The chemical composition of the alkaline granitoids show that $SiO_2$ varies from 64.55% to 72.29% with a mean value of 67.32%, $Na_2O+K_2O$ is high (9.85~11.87%) with a mean of 11.14%, $K_2O$ is 2.39%~5.47% (mean = 4.73%), the $K_2O/Na_2O$ ratios are 0.31~0.96, $Al_2O_3$ ranges from 12.58% to 15.44%, and total $FeO^T$ is between 2.35% and 5.65%. CaO, MgO, MnO, and $TiO_2$ are low. The REE content is high and the total ${\sum}REE$ is $(263{\sim}1219){\times}10^{-6}$ (mean = $776{\times}10^{-6}$), showing LREE enrichment HREE depletion with strong negative Eu anomalies. In addition, the chondrite-normalized REE patterns of the alkaline granitoids belong to the "seagull" pattern of the right-type. The Zr content is $(113{\sim}1246){\times}10^{-6}$ (mean = $594{\times}10^{-6}$), Zr+Nb+Ce+Y is between $(478{\sim}2203){\times}10^{-6}$ with a mean of $1362{\times}10^{-6}$. Furthermore, the alkaline granitoids have high HFSE (Ga, Nb, Ta, Zr, and Hf) content and low LILE (Ba, K, and Sr) content. The Nb/Ta ratio varies from 7.23 to 32.59 (mean = 16.59) and the Zr/Hf ratio is 16.69~58.04 (mean = 36.80). The zircons are depleted in LREE and enriched in HREE. The chondrite-normalized REE patterns of the zircons are of the "seagull" pattern of the left-inclined type with strong negative Eu anomaly and without a Ce anomaly. The Boziguoer A-type granitoids share similar features with A1-type granites. The average temperature of the granitic magma was estimated at $832{\sim}839^{\circ}C$. The Boziguoer A-type granitoids show crust-mantle mixing and may have formed in an anorogenic intraplate tectonic setting under high-temperature, anhydrous, and low oxygen fugacity conditions.

Effect of proton irradiation on interfacial and electrical performance of N+Np+ InP/InGaAs hetero-junction

Zhang Chen,Su Yongbo,Mei Bo,Yang Feng,Zhang Jialin,Yun Huanqing,Liu Bo,Sun Yi,Zhang Haiming,Jin Zhi,Zhong Yinghui 한국물리학회 2023 Current Applied Physics Vol.48 No.-

InP-based hetero-junction bipolar transistors (HBTs) are attractive for various millimeter-wave and terahertz electronics due to their ultrahigh frequency performance. Therefore, the study of their irradiation reliability is extremely urgent. In this work, 2 MeV proton irradiation experiment has been carried out on self-fabricated N+Np+ InP/InGaAs hetero-junction. The degradation mechanisms have systematically been studied after exposure to protons of 5 × 1013 H+/cm2. The voltage range of recombination current at low forward bias has been largely expanded from 0-0.2 V to 0–0.6 V. Furthermore, the interface states properties have been characterized by utilizing the frequency-dependent conductance technique, the interface states density (Dit) has increased from approximately 9.02 × 1012 cm-2 eV-1–1.99 × 1013 cm-2 eV-1 to 9.51 × 1012 cm-2 eV-1–2.00 × 1013 cm-2 eV-1 after irradiation. The study would be great significance for understanding the evolution of proton irradiation on relative devices.