1,721,259 research outputs found
IA TIPS
No full textAmb la IA, els estudiants han de protegir el seu aprenentatge i evitar riscos acadèmics i legals: la IA pot inventar dades, referències o violar la confidencialitat. No és un cercador ni un expert; només prediu respostes a partir de patrons, i per això cal usar-la amb consciència crítica, verificació i entenent les seves limitacions
Life under Continuous Streaming: Recrystallization of Low Concentrations of Bacterial SbpA in Dynamic Flow Conditions
No full textThe well-known bacterial S-layer protein SbpA from Lysinibacillus sphaericus CCM2177 induces spontaneous crystal formation via cooperative self-assembly of the protein subunits into an ordered supramolecular structure. Recrystallization occurs in the presence of divalent cations (i.e., Ca2+) and finally leads to producing smooth 2-D crystalline coatings composed of squared (p4) lattice structures. Among the factors interfering in such a process, the rate of protein supply certainly plays an important role since a limited number of accessible proteins might turn detrimental for film completion. Studies so far have mostly focused on high SbpA concentrations provided under stopped-flow or dynamic-flow conditions, thus omitting the possibility of investigating intermediate states, in which dynamic flow is applied for more critical concentrations of SbpA (i.e., 25, 10, and 5 µg/mL). In this work, we have characterized both physico-chemical and topographical aspects of the assembly and recrystallization of SbpA protein in such low concentration conditions by means of in situ Quartz Crystal Microbalance with Dissipation (QCMD) and atomic force microscopy (AFM) measurements, respectively. On the basis of these experiments, we can confirm how the application of a dynamic flow influences the formation of a closed and crystalline protein film from low protein concentrations (i.e., 10 µg/mL), which otherwise would not be formed
A Time-Efficient Competitive Pokemon Team-Building Algorithm
No full textThe Pokemon video game franchise is based on players, also known as trainers, capturing and battling with fictitious creatures called Pokemon. Competitive Pokemon battling is a complicated business. Before even stepping into the arena, a trainer must design a competitively viable team of six Pokemon to battle with. This task is a difficult one because there are currently 721 species of Pokemon to construct a team from, and new Pokemon are revealed every year. The author therefore developed the Score-Based Pokemon Analysis algorithm, also known as SBPA, to aid users in easily and quickly designing new Pokemon teams. The SBPA algorithm relies heavily on user interaction, and therefore requires the user to have already chosen at least one Pokemon to build his/her team around. The algorithm then analyzes the Pokemon the user has already chosen and returns a selection of Pokemon that would best further the development of the team. The user then chooses another team member, and the process is repeated until the user has developed his/her team. The SBPA algorithm analyzes the inputted team using three factors: Base Statistics, Typing, and the Popularity Factor. These three factors are then combined to determine the best potential team members per iteration. The algorithm focuses not only on user interactivity, but also on time efficiency in order to provide valuable information to the user in a time frame that would be impossible to a technologically unaided trainer. As a cost for its speed and user-friendliness, SBPA is less accurate in determining the absolutely optimal team than certain other algorithms. However, when considering the target market of the algorithm, the author found these compromises worthwhile.Electrical Engineering, Mathematics and Computer ScienceDelft Institute of Applied Mathematic
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
A theoretical investigation on the dynamics and optical properties of 2-(1-pyridinio)benzimidazolate (SBPa) in solution
Get PDF有机功能材料由于其良好的光电特性，目前已经成为科研工作者研究的热点。2-(1-吡啶盐)苯并咪唑分子(SBPa)，一种杂环甜菜碱吡啶类化合物，具有显著的非线性光学性质，更是引起了国内外科研工作者的极大兴趣。我们通过构建合理的理论模型，采用分子动力学，从头算法以及组合量子力学和分子力学方法，系统地研究了SBPa分子在不同极性溶剂下的聚集行为和周围溶剂环境对体系的光学性质的影响以及内在本质的原因。本论文内容主要分成以下三个部分： 第一部分主要介绍研究的体系：SBPa分子的相关介绍，研究背景，具体所使用的理论模型和研究方法以及研究目的。 第二部分简要介绍研究过程中使用到的相关理论方法。首先是基于波...Functional organic material has become the forefront of the current research because of its excellent photoelectric physical properties. 2-(1-pyridinio)benzimidazolate (SBPa), a kind of heterocyclic betaine pyridinium compounds with remarkable nonlinear optical properties, has aroused great interest of researchers all over the world. Herein, the aggregation behavior and optical properties for SBPa...学位：理学硕士院系专业：化学化工学院_物理化学学号：2052012115156
Variations on the Author
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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