114,426 research outputs found
author-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
Autologous collagen induced chondrogenesis (ACIC: Shetty-Kim technique) - A matrix based acellular single stage arthroscopic cartilage repair technique
No full textThe defects of articular cartilage in the knee joint are a common degenerative disease and currently there are several established techniques to treat this problem, each with their own advantages and shortcomings. Autologous chondrocyte implantation is the current gold standard but the technique is expensive, time-consuming and most versions require two stage procedures and an arthrotomy. Autologous collagen induced chondrogenesis (ACIC) is a single-stage arthroscopic procedure. This method uses microfracture technique with atelocollagen mixed with fibrin gel to treat articular cartilage defects. We introduce this ACIC techniques and its scientific background
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Design of Systolic Architecture Using Evolutionary Computation
No full textThis work presents a new concept for finding the optimal values for the entire three fundamental design vectors namely scheduling, projection and processor so that not only architecture design could be feasible along with that maximum hardware utilizing efficiency could be achieved. This Approach also having the focus to minimize the total delay involved with systolic architecture design. Evolutionary programming has applied to find the optimal solution. Presented work and result will provide facility to designer without any involvement to find out best suited architecture for a particular application. The Proposed method having capability to find the large number of optimal vectors for any algorithm which can be implemented in systolic architecture. The increasing demands of speed and performance in modern signal and image processing applications necessitate a revolutionary super -computing technology. The proposed method is coded in MATLAB editor and simulation environment. Shilpa V | Suma V Shetty "Design of Systolic Architecture Using Evolutionary Computation" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-4 , June 2018, URL: https://www.ijtsrd.com/papers/ijtsrd15776.pd
Variations on the Author
No full text“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
Effect of roughness, microstructure, and chemistry on the environmental durability of structural alloys
No full textUnlike functional materials where one design property is usually optimized, structural materials need to meet several design requirements including but not limited to excellent mechanical properties and environmental tolerance. However, more often than not, the metallurgical principles used to improve mechanical properties result in a decrease in the environmental tolerance. Though it is difficult to design materials that can thrive in extreme environments like high temperature, high pressure, and harsh chemicals, these conditions are often where the biggest scientific and economic opportunities lie. Aeroengines, and oil refineries are two example applications that encounter these issues. This study specifically focusses on improving the environmental tolerance of NiCrAl films a common bond coat used in aeroengines, and ferrous alloys used in petroleum production. The goal was to develop solutions that improve the environmental tolerance while minimally affecting other properties of these alloys.
The oxidation behavior of a model sputtered NiCrAl system was studied in various time and oxygen partial pressure (pO2) regimes. Low pO2 conditions seemed to favor the formation of protective oxides. However, tuning the composition of the base alloy was an effective way to limit the oxidation rate in high pO2 conditions. Thermal destabilization of the sputtered microstructure was found to take place on similar timescales to the transient oxide formation. Thus dilute Y additions were made to temporarily stabilize the sputtered microstructure and manipulate the transient stages of oxidation.
Yttrium addition not only retarded grain growth through nanoclustering and kinetically pinning grains, but also helped nucleate and grow dense, and slow-growing oxides. In some cases, the improvement in oxidation resistance via. Y addition was similar to reducing the pO2 by several orders of magnitude. Robust α-alumina oxides formed on Y doped NiCrAl films at temperatures as low as 900 oC by oxidation in an air environment which is unprecedented and could be of major commercial importance. An attempt was made to understand this anomalous oxidation behavior by using unconventional diffusion-triples comprising of a sputtered NiCr (undoped and Y doped) top layer, Al middle layer, and a sintered (micrograined) NiCr bottom layer. Annealing experiments conducted on the diffusion-triples proved that Al diffusion in sputtered NiCr is more rapid than that in sintered NiCr. Through the use of profile processing techniques, Al was shown to follow type B kinetics for grain boundary diffusion in sputtered NiCr. It also revealed that Y addition to sputtered NiCr further accelerates Al diffusion through a non-Fickian mechanism involving Al clustering.
The baseline fouling and corrosion behavior of ferrous alloys in a high temperature, high pressure, and an asphaltenic environment was also evaluated. Key insights were generated on the interplay between the thermochemical properties of the asphaltene, the environmental conditions, surface preparation of the alloys, and the chemistry of the deposits. X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy allowed for the first time to pinpoint mechanisms for high temperature model asphaltene deposition on ferrous alloys. Improving surface roughness alone was found to be a good strategy to mitigate asphaltenic fouling at lower temperatures where the asphaltene remains intact. However, at temperatures where reactive asphaltene decomposition products become present in solution, surface chemistry control becomes important. Specifically, a protective atomic layer deposition alumina chemistry on steels was found to significantly reduce asphaltenic fouling.
In order to evaluate whether a protective alumina chemistry could be generated on components with more complex geometries, low temperature pack cementation of ferrous alloys was conducted. Preliminary data did show an improvement in anti-fouling properties with both model asphaltenes in a static environment, as well as with crude oil in a hydrodynamic environment. However, XPS revealed a mixed alumina-hematite oxide on the surface that may be limiting the anti-fouling properties of these surfaces. Finally, new insights gained from developing low temperature pack cementation for ferrous alloys allowed for the modification of low thermal stability, functional metallic structures like Ni inverse opals. It resulted in a thermal stability enhancement by 500 oC, comparable to refractory metals in the same configuration. And also improved both the modulus and hardness of these structures.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-05-01The student, Pralav Shetty, accepted the attached license on 2019-02-20 at 15:57.The student, Pralav Shetty, submitted this Dissertation for approval on 2019-02-20 at 16:17.This Dissertation was approved for publication on 2019-02-22 at 10:53.DSpace SAF Submission Ingestion Package generated from Vireo submission #13398 on 2019-08-22 at 16:19:59Made available in DSpace on 2019-08-23T20:44:32Z (GMT). No. of bitstreams: 3
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The Relationship Between Brain–Heart Autonomic Signaling and Aging: A Gender-Specific Longitudinal Perspective from the Baltimore Longitudinal Study on Aging
No full textBackground
Low heart rate variability (HRV) has been previously associated with adverse cardiovascular outcomes in high-risk populations or subjects with previously documented cardiovascular conditions. Information about HRV in healthy subjects is, however, scant. Moreover, gender effects of HRV in healthy subjects have not being well described. The objective of this study was to evaluate aging-related changes of the autonomic nervous system as measured by HRV in a cohort of healthy subjects.
Methods
We evaluated 368 subjects from the Baltimore Longitudinal Study on Aging (BLSA) who had 2 or more Holter studies with time-domain variables lasting 24 hours. The study population is a series of healthy volunteers of different ages, starting at 20 years old, followed indefinitively with a series of evaluations over time. The data were analyzed using linear mixed effects that account for unbalanced unequally spaced observations using SAS® 9.2 software, which is characteristic of the BLSA cohort. The number of pairs of successive NNs that differ by >50 ms (pNN50), the standard deviation of NN intervals (SDNN), and the standard deviation of the average NN intervals (SDANN) were used to measure HRV.
Results
Average age of participants in this study is 65.3 years (range 20–97 years). We found a statistically significant difference on HRV variables and gender, with women having lower HRV values than men (pNN50 –5.416%, P = .002; SDNN –18.974 ms, P = .0001; SDANN –12.945 ms, P = .0001). When each variable was analyzed by gender, our study did not show a significant longitudinal association between aging and changes in HRV, but it did show a significant cross-sectional association. This association is characterized by lower HRV variables measurements in later ages of life compared to earlier ones.
Conclusions
Our study shows that changes in HRV are gender dependent, with women having lower HRV than men at any given age. We also found that HRV variable measurements are lower in advanced ages compared to younger ones
Studies on groundnut proteins. V. Physico-chemical properties of arachin prepared by different methods.
No full textOptical rotatory dispersion (ORD), circular dichrosin (CD) and fluorescence (FL) spectra of arachin (the major protein of groundnut) when prepared by the procedures of Tombs [Biochemical Journal (1965) 96, 119], Dawson [Analytical Biochemistry (1971) 41, 305] or Shetty & Rao [FSTA (1975) 7 4J649] were measured. ORD and CD spectra showed differences for the 3 methods of preparation, while FL did not. The effect of denaturation by various concn. of sodium dodecyl sulphate, guanidinium hydrochloride, or acid was the same on all 3 arachins. [See FSTA (1976) 8 6J887 for part IV.
Využití sociálních médií v B2B prodeji
No full textTato diplomová práce se zabývá tím, jak mohou B2B obchodníci využívat sociální média v prodeji. Na základě systematické rešerše literatury, autor zjistil, že akademici, zkoumající danou problematiku, navrhují další výzkum, a to: v kterých konkrétních krocích se dají využít sociální média v prodeji (Salo, 2017). Autor se na základě toho rozhodl zjistit, jaké sociální sítě, různé technologie a pluginy se dají využít v B2B prodeji - tzv. social sellingu. Social selling se v této práci týká primárně procesu akvizice a okrajově péčí o stávající zákazníky. Autor si vybral kvalitativní průzkum pomocí 10 hloubkových polo-strukturovaných rozhovorů, aby odhalil jak, která sociální média to jsou, tak i motivaci prodejců, proč tato média používat/nepoužívat. Aby autor dodržel správnost vyhodnocení výsledků, data byla analyzována pomocí Tématické analýzy, která v této studii vykrystalizovala 2 hlavní strategické přístupy v social sellingu. Tyto přístupy (tzv. Push a Pull strategie) obsahují praktické příklady a konkrétní aktivity, které mohou prodejci využívat v každodenní praxi. Tyto výsledky jsou prezentovány s důrazem na praktičnost a jednoduchost implementace. Tvoří proto hlavní přínos autorovo výzkumu. V poslední části autor zmiňuje výzvy a manažerská doporučení, které mohou obchodníci využít v každodenním pracovním životě.This diploma thesis focuses on social media usage in B2B sales. Based on the systematic literature review conducted by the author, he has found out that recent researchers (Salo, 2017) suggest further research in the area of how and in which sales phase should various social networking sites, technologies and plugins used. To further fill this research gap, author decided to identify these social media and their usage among B2B salespeople in the so-called social selling process. The social selling process in this thesis applies mainly to acquiring new prospects and tangentially to taking care of existing clients (follow-up step). Author has chosen a qualitative research method via conducting 10 in-depth semi-structured interviews to reveal these instruments as well as motivation of a sales person on why to use social media in the selling process. The collected data was analyzed using Thematic analysis to ensure the right procedure and to identify main themes which crystalized into 2 main strategic approaches in social selling. These approaches (Push and Pull) include practical examples of concrete activities which sales people can use in their daily jobs and are presented with focus on practicality and ease of implementation. These also form the main contribution of author`s research. In the last part, author mentions challenges in social selling and recommended managerial implications for salesforce
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