1,721,432 research outputs found
Chuang yu cheng dong di yi qu zhuang xin zao fo tang yi suo gong de ji 創 於 城 東 第 一 渠 莊 新 造 佛 堂 一 所 功 德 記.
No full textChuang yu cheng dong di yi qu zhuang xin zao fo tang yi suo gong de ji 創 於 城 東 第 一 渠 莊 新 造 佛 堂 一 所 功 德 記Numérisation effectuée à partir d'un document original.Brouillon d'un texte commémoratif, avec préface, célébrant l'achèvement d'un temple bouddhique décoré de peintures. Sans nom ni date. Écr. xing du Xe siècle (?). Encre foncée. 1 addition (col. 5), 2 ratures (col. 3 et 7), 1 correction (col. 14) et 1 signe en forme d'équerre (col. 3). Marges sup. 0,2 à 0,7 cm, inf. 0,1 à 3,2 cm
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Electronic Configuration and Bond Characterization on Ni, Cu and Se Containing Compounds through Charge Density Studies and X-ray Absorption Spectroscopy
No full text一系列以含硫且具自身氧化能力的配位基MNT (maleonitriledithiolate； S2C2(CN)2)所形成的金屬-硫錯合物(PyH)z[M(MNT)2] (M = 鎳、銅；z = 2、1)，展現了位置選擇性的氧化還原性質。金屬的K-edge及L-edge X光吸收光譜分別對鎳與銅金屬氧化態提供了直接的證據。在鎳錯合物的系統中，氧化還原反應發生在具自身氧化還原能力的配位基上(Ligand-Based)。相反地，在銅的錯合物系統中，氧化還原反應發生在金屬銅本身(Metal-Based)。此外，硫的X光吸收光譜配合DFT計算亦提供了金屬-硫鍵結的資訊，結合鎳、銅金屬及硫的X光吸收光譜結果確認了此系列樣品的氧化還原性質。經由高解析的低溫X光單晶繞射數據所得到的電子密度分析，藉由變型電子密度分析及鍵臨界點的拓樸分析也提供了金屬-配位基的鍵結特性。由多極模型導出的金屬d軌域電子分佈及monopole charge皆驗證了XAS所提出的氧化還原性質。
含第四週期元素硒原子之樣品的電子密度研究：第一個樣品為3,4-trimethylene-6a-selenaselenophthene，此分子包含了一接近線型排列且具有三中心四電子鍵結特性的三核硒鏈型部分。第二個樣品為平面四方形的鎳-硒錯合物Ni[Se2P(O-iPr)2]2，其分子間具有微弱的硒-硒作用力(3.294A)，有趣地，透過分子內及分子間的硒-硒作用力形成了平面四方的硒原子網狀結構，結合拓樸分析及Hirshfeld surface證實了微弱的分子間硒-硒作用力。
為了合理解釋以atr (azotriazole)為架橋配位基的三維及二維自旋交叉錯合物Fe(atr)3(ClO4)2‧2H2O與Fe(atr)(pyz)(NCS)2 之兩階段自旋交叉的磁行為與結構的關係，進行了詳細的磁性量測實驗，證實三維系統中兩階段的磁行為是取於晶格中溶劑分子的存在與否，且二維與三維的樣品皆明顯地展現出晶格中的溶劑分子影響磁行為改變的溫度，溶劑影響自旋交叉現象的也成功地利用X光單晶結構解析加以證明。A series of metal-sulfur square planar complexes, (PyH)z[M(MNT)2], where M = Ni and Cu, MNT a non-innocent ligand maleonitriledithiolate, [S2C2(CN)2]z-, z=2, 1, are synthesized in order to characterize the site-selected oxidation-reduction properties. Metal K-edge and L-edge X-ray absorption spectroscopy(XAS) are used to deliver the direct evidence for the oxidation state of metal ion. It is clearly demonstrated that redox reaction takes place in the ligand (Ligand-Based) for Ni complexes but in the metal (Metal-Based) for the Cu complexes. In addition, the sulfur K-edge absorption together with the DFT calculation gives a clear picture on the covalency of M-S bond. With the XAS of metal and S, the oxidation reduction site is firmly established for Cu and Ni complexes. The charge density studies from high resolution single crystal X-ray diffraction measurements at 100K are also investigated to aim at the understanding on the nature of the metal-ligand bond in terms of deformation densities and topological properties associated with the bond critical points (BCP). The d-Orbital populations of metal ion derived from multipole model and the monopole charge thus obtained are agreeable with the redox properties established from XAS.
Charge density studies on Se-containing compounds are undertaken: 3,4-trimethylene-6a-selenaselenophthene contains a linear tri-selenium chain in the molecule, which exhibits a three-centered four-electron bond for Se-Se-Se part. A square planar Ni complex bonded with four selenide ligands, Ni[Se2P(O-iPr)2]2 is studied. Ni-Se bonds are characterized together with the short intermolecular Se-Se contact of 3.294 A. Interestingly, there is a Se square network in the crystal through the intra- and inter- molecular Se×××Se contacts. Such contacts are first characterized by topological analysis and Hirshfeld surface mapping.
The magnetic measurements of three-dimensional and two-dimensional atr-based Fe(II) spin crossover (SCO) framework systems (Fe(atr)3(ClO4)2‧2H2O and Fe(atr)(pyz)(NCS)2‧4H2O) are studied in detail in order to solve the puzzle of the stepwise spin transition phenomena. It is found that the stepwise transition is due to the loss of water molecules in the lattice, where the hydrated/dehydrated forms of 2D and 3D systems apparently exhibit quite different transition temperatures. The solvent-dependent spin crossover phenomena in these structures are systematically demonstrated
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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