6,140 research outputs found
DIETARY CONDITIONS AND DIFFERENTIAL ACCESS TO FOOD RESOURCES AMONG THE VARIOUS CLASSES DURING THE HAN PERIOD
No full textIn this thesis, I study how food resources and dietary conditions were determined by social and economic status during the Han period in China, B.C. 206~A.D.220. Even though earlier scholars have published research concerning the Chinese food culture of this period, these studies were limited in that they only illustrated the dietary culture of the upper class or the available food resources in one geographic area. Also, without any persuasive data, it has been assumed by these earlier scholars that there were big differences in food resources and food consumption between the upper and lower classes. In this thesis, for comparison among the classes, I divide the social and economic classes into five stratified groups: nobles, officials, peasants, soldiers and convicts. After a brief introduction of the nature of each social class, I examine the food resources and nutritional condition of each group using information such as the wealth and income of each group, the market price of food resources, the agricultural products of peasants, and the amount of food distribution to soldiers and convicts. I found these data from archaeological remains, received historical records and pictorial data, and excavated texts. This research shows a broader view of Chinese dietary condition focusing not only on the variety of food resources of nobles, but also on the different food accessibilities among the officials, and the food deficiencies of peasants. It also deals with the situations of food supply for soldiers and convicts in an effort to reveal the true dietary consumption and nutritional conditions for all Chinese. This research proves that the various classes during the Han period in China had different food resources and dietary conditions
sj-docx-1-han-10.1177_15589447231221170 – Supplemental material for Brachial Gunshot Wounds: Injury Patterns and Considerations for Managing the Abnormal Neurological Examination
No full textSupplemental material, sj-docx-1-han-10.1177_15589447231221170 for Brachial Gunshot Wounds: Injury Patterns and Considerations for Managing the Abnormal Neurological Examination by David Chi, Damini Tandon, Adam G. Evans, Danielle J. Brown, Rachael M. Payne, Amelia C. Van Handel, Kevin G. Shim, Susan E. Mackinnon and Mitchell A. Pet in HAND</p
Non-Catastrophic Landslides Induced by the Mw 7.6 Chi-Chi Earthquake in Central Taiwan Revealed by the PIV Analysis
No full text由於崎嶇山地與每年颱風季節的大量降雨，自然災害的現象，譬如山崩與土石流，非常普遍地在台灣發生。在1999規模7.6的集集地震之後，遽變性的山崩與土石流則更為頻繁地發生。然而，由集集地震於中台灣所引發之非遽變山崩則很少被報告與記錄。為了要瞭解非遽變性的紅菜坪山崩的特性，則利用數對研究區域的灰階航空照片來比較與分析。這些灰階航空照片先經過精準的正射後以校正其航照中物體幾何變形。接著將正射影像利用質點影像測速技術之交互相關法進行分析。因而非遽變性的紅菜坪山崩之位移方向、位移量及範圍則能夠被揭示。
由分析計算結果所得到的最大水平位移約為24公尺，且位移的方向落於北方與西方之間。紅菜坪山崩之明確的位移範圍可以被界定，其面積約為1.2平方公里。除了主要的山崩區之外，在其東方也有小型的山崩被偵測到，其位移量大約為10公尺向西。
根據結果，推斷紅菜坪山崩區域的南北兩半部分別有兩個不同的滑動塊體。基於紅菜坪地區的地形型態，非遽變性的紅菜坪山崩顯示符合圓弧型破壞。然而，詳細的紅菜坪山崩機制需要更多的地質調查與相關資料才能更加瞭解。Phenomena of natural disasters, such as landslide and debris flow torrents, are very common in Taiwan due to the rugged mountains and large precipitation during the typhoon season every year. After the 1999 Mw 7.6 Chi-Chi earthquake, the catastrophic landslides and debris flow torrents occur more frequently. However, the non-catastrophic Hongtsaiping landslide triggered by the Chi-Chi earthquake in Central Taiwan is less reported and documented. To understand the characteristics of the non-catastrophic Hongtsaiping landslide, several pairs of gray-scale aerial photographs of the study area are compared and analyzed. They are first precisely orthorectified in order to correct geometric distortion of the aerial photographs. These images are then analyzed by cross-correlation using the Particle Image Velocimetry (PIV) technique. And the directions, magnitude as well as the boundary of the non-catastrophic Hongtsaiping landslide are revealed.
The calculated results reveal that the maximum horizontal displacement is about 24 m, and directions of displacement lie between north and west. Specific boundary of the landslide can be confirmed, and the dimension of the Hongtsaiping landslide area is measured about 1.2 km2. In addition to the main landslide area, a minor landslide area east of the main landslide area is also detected. The small landslide moved toward the west and the magnitude of displacement is measured about 10 m.
According to the results, it is inferred that there are two different sliding blocks in the northern and southern parts of the Hongtaiping landslide area. Based on the patterns of topography within the Hongtsaiping area, the non-catastrophic Hongtsaiping landslide appears to fit the type of circular failure. However, the detailed mechanism of the Hongtsaiping landslide needs more geological survey and data to be understood.Abstract ------------------------------------------------ I
摘要 -------------------------------------------------- III
致謝 --------------------------------------------------- IV
Content ------------------------------------------------- V
Figure and Table Index -------------------------------- VII
1 Introduction ------------------------------------------ 1
1.1 Problem Statement ----------------------------------- 1
1.2 Previous Work --------------------------------------- 5
1.3 Purpose of the Research ----------------------------- 7
2 Historical Landslides and the Hongtsaiping Landslide induced by the Chi-Chi Earthquake ----------------------- 9
2.1 Geological background and seismicity ---------------- 9
2.2 Historical landslides in central Taiwan ------------ 15
2.3 Investigation of the non-catastrophic Hontsaiping landslide ---------------------------------------------- 16
3 Image Orthorectification and Particle Image Velocimetry (PIV) -------------------------------------------------- 21
3.1 Orthorectification --------------------------------- 21
3.1.1 Rectification ------------------------------------ 24
3.1.2 Georeferncing ------------------------------------ 26
3.1.3 RMS error ---------------------------------------- 27
3.1.4 Resampling --------------------------------------- 29
3.2 Particle Image Velocimetry (PIV) ------------------- 32
3.2.1 Cross-correlation -------------------------------- 37
3.2.2 Sub-pixel peak interpolation --------------------- 40
3.2.3 Patch size --------------------------------------- 42
4 Results from the PIV Analysis ------------------------ 45
4.1 Case I: Throgh the 1999 Chi-Chi earthquake --------- 45
4.1.1 Time interval of 06/1998 to 12/1999 -------------- 45
4.1.2 Time interval of 06/1998 to 10/2002 -------------- 48
4.2 Case II: Before the 1999 Chi-Chi earthquake -------- 52
4.3 Case III: After the 1999 Chi-Chi earthquake -------- 56
5 Discussions------------------------------------------- 60
5.1 The effect of the errors of orthorectification ----- 60
5.2 Appearance of the ground surface in the aerial photographs -------------------------------------------- 62
5.3 Inference for the non-catastrophic Hongtsaiping landslide ---------------------------------------------- 63
5.3.1 The boundary of the Hongtsaiping landslide ------- 63
5.3.2 The possible sliding blocks ---------------------- 65
5.3.3 The mechanism of the Hongtsaiping landslide ------ 69
6 Conclusions ------------------------------------------ 73
References --------------------------------------------- 75
Appendix I --------------------------------------------- 78
Appendix II -------------------------------------------- 7
Source code and demo of MAGUS (Machine Learning and Graph Theory Assisted Universal Structure Searcher) v2.0.0
No full textThis is the source code and demo for MAGUS (Machine Learning and Graph Theory Assisted Universal Structure Searcher) v2.0.0. Future updates can be accessed from gitlab (https://gitlab.com/bigd4/magus) after registration (https://www.wjx.top/vm/m5eWS0X.aspx).MAGUS is a Python package designed to predict crystal structures, which is free for non-commercial academic use, subject to registration and approval at https://www.wjx.top/vm/m5eWS0X.aspx .
1) This Code or its derivative work will not be used for any purpose other than non-commercial research.
2) This Code or its derivative code will not be published or otherwise distributed.
3) The use of this Code should be acknowledged by citing the tutorial paper describing the use of this code:
[1] Junjie Wang, Hao Gao, Yu Han, Chi Ding, Shuning Pan, Yong Wang, Qiuhan Jia, Hui-Tian Wang, Dingyu Xing, and Jian Sun, "MAGUS: machine learning and graph theory assisted universal structure searcher", National Science Review 10 (7), nwad128 (2023).
[2] Kang Xia, Hao Gao, Cong Liu, Jianan Yuan, Jian Sun, Hui-Tian Wang, Dingyu Xing, "A novel superhard tungsten nitride predicted by machine-learning accelerated crystal structure search", Sci. Bull. 63, 817 (2018).Additional references that may be cited (at the discretion of the user) are:
Graph theory:
[3] Hao Gao, Junjie Wang, Yu Han, Jian Sun, "Enhancing Crystal Structure Prediction by Decomposition and Evolution Schemes Based on Graph Theory", Fundamental Research 1, 466 (2021).
[4] Hao Gao, Junjie Wang, Zhaopeng Guo, Jian Sun, "Determining dimensionalities and multiplicities of crystal nets" npj Comput. Mater. 6, 143 (2020).
Surface reconstruction:
[5] Y. Han, J. Wang, C. Ding, H. Gao, S. Pan, Q. Jia, and J. Sun, "Prediction of surface reconstructions using MAGUS", The Journal of Chemical Physics 158 (17), 174109 (2023).
Structure searching in confined space:
[6] Chi Ding, Junjie Wang, Yu Han, Jianan Yuan, Hao Gao, and Jian Sun, "High Energy Density Polymeric Nitrogen Nanotubes inside Carbon Nanotubes", Chin. Phys. Lett. 39, 036101 (2022). (Express Letter)Peer reviewe
chi(cJ) production associated with a c(c)over-bar pair at hadron colliders
No full textchi(cJ) (J = 0, 1, 2) production associated with a charm quark pair in hadron collisions is calculated in the framework of nonrelativistic QCD at the Tevatron and LHC. It is found that the color-singlet contribution is small and the color-octet contribution may be dominant in the large p(T) region. The differential cross section of p (p) over bar -> chi(c) + c (c) over bar is at least 1 order of magnitude smaller than the next-to-leading order result of chi(cJ) inclusive production p (p) over bar -> chi(c) + X; therefore chi(cJ) production in p (p) over bar -> chi(c) + c (c) over bar may have negligible influence on the ratio R-chi c = sigma chi c2/sigma chi c1 measured by CDF Collaboration at the Tevatron. The feed-down contribution from chi(cJ) + c + (c) over bar is found to be large compared with J/psi direct production and may have important influence on the measurement of J/psi + c + (c) over bar. The validity of fragmentation approximation for the process is also discussed.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)0ARTICLE11null8
Study of B c + → χ c π + decays
No full textAbstract A study of B c + → χ c π + decays is reported using proton-proton collision data, collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb −1. The decay B c + → χ c 2 π + is observed for the first time, with a significance exceeding seven standard deviations. The relative branching fraction with respect to the B c + → J / ψ π + decay is measured to be B B c + → χ c 2 π + B B c + → J / ψ π + = 0.37 ± 0.06 ± 0.02 ± 0.01 , where the first uncertainty is statistical, the second is systematic, and the third is due to the knowledge of the χ c2 → J/ψγ branching fraction. No significant B c + → χ c 1 π + signal is observed and an upper limit for the relative branching fraction for the B c + → χ c 1 π + and B c + → χ c 2 π + decays of B B c + → χ c 1 π + B B c + → χ c 2 π + = < 0.49 is set at the 90% confidence level
HECKE CHARACTERS OF SINGULAR DRINFELD MODULES
No full textThe j-invariant j of a Drinfeld module of rank 2 on F-q[T] over C determine an isomorphism class of Drinfeld modules over C. But for singular Drinfeld modules the pair (j,chi) of a singular j-invariant j and an algebraic Hecke character chi represent an H-isomorphism class of singular Drinfeld modules, where H is the Hilbert class field of certain imaginary quadratic function field
A Decomposition of North American Trade Growth since NAFTA
No full textTotal U.S. trade with NAFTA partners has increased 78 percent in real terms since 1993-U.S. Mexico trade alone is up 141 percent-compared to a 43 percent increase in U.S. trade with the rest of the world. In this article we compare the nature of U.S. trade growth with Canada and Mexico to growth in U.S. trade with non NAFTA partners. We apply a simple decomposition of trade growth offered by Hummels and Klenow (2002) that provides insights into whether the United States is trading more of the same goods with NAFTA partners since 1993, or trading new products. The results provide evidence of both. A sizeable component of U.S. trade growth since 1993 can be explained by increases in the variety of products the U.S. imports from Mexico.NAFTA, International Trade
Search for hadronic transition chi(cJ) -> eta(c)pi(+)pi(-) and observation of chi(cJ) -> K(K)over-bar pi pi pi
No full text<p>Hadronic transitions of chi(cJ) -> eta(c)pi(+)pi(-) (J = 0, 1, 2) are searched for using a sample of 1.06 x 10(8) psi(3686) events collected with the BESIII detector at the BEPCII storage ring. The eta(c) is reconstructed with (KSK +/-)-K-0 pi(-/+) and K+K-pi(0) final states. No signals are observed in any of the three chi(cJ) states in either eta(c) decay mode. At the 90% confidence level, the upper limits are determined to be B(chi(c0) -> eta(c)pi(+)pi(-)) <0.07%, B(chi(c1) -> eta(c)pi(+)pi(-)) <0.32%, and B(chi(c2) -> eta(c)pi(+)pi(-)) <0.54%. The upper limit of B(chi(c1) -> eta(c)pi(+)pi(-)) is lower than the existing theoretical prediction by almost an order of magnitude. The branching fractions of chi(cJ) -> (KSK +/-)-K-0 pi(-/+)pi(+)pi(-), K+K-pi(+)pi(-)pi(0), omega K+K-, and phi pi(+)pi(-)pi(0) (J = 0, 1, 2) are measured for the first time. DOI: 10.1103/PhysRevD.87.012002</p>
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