Articles de revues : « Tracking shares »

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Hofmann, Megan. « COVID-19 tracking apps ». XRDS : Crossroads, The ACM Magazine for Students 28, n^o 2 (décembre 2021) : 30–32. http://dx.doi.org/10.1145/3495247.

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Muller, Mariska, Suné Ferreira-Schenk, John George Jansen van Rensburg, Daniel Mokatsanyane et Ruschelle Sgammini. « Tracking the Performance of Listed Shares : A Comparison Between JSE Single- and Dual-listed Shares ». International Journal of Economics and Financial Issues 12, n^o 6 (23 novembre 2022) : 145–54. http://dx.doi.org/10.32479/ijefi.13694.

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The measurement of a stocks return over a time period is analysed for several reasons. The most obvious and most important one is to inform investors’ expectations regarding future earnings potential. Therefore, the study made a comparison using the financial performance of single-listed shares versus dual-listed shares that trade primarily on the South African stock market (JSE). The time-period for the comparison of financial performance of single- and dual-listed shares was from 2005 to 2020 to confirm or refute the general perception surrounding superior returns of dual-listed companies as opposed to single-listed companies. Utilising financial ratios can be imperative when making informed judgments about investment portfolios. Seven of the most important financial ratios were used to measure the performance of company shares within nine specified industry sectors in South Africa. These included the earnings per share ratio (EPS), price-earnings ratio (P/E), market to book value ratio (M/B), current ratio (CR), debt to equity ratio (DER), and the return on equity ratio (ROE). The nine identified industries included the transport, consumer staples, printing, pharmaceutical, mining and manufacturing, technology, luxury goods and services, financial services, and real estate industries. The results indicate that the dual-listed companies do indeed outperform single-listed companies on the JSE for the majority of the financial ratios over the specified period. This study contributes to portfolio management by informing equity allocation in the short-term and long-term.

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Grover, Rajiv, et V. Srinivasan. « An Approach for Tracking Within-Segment Shifts in Market Shares ». Journal of Marketing Research 26, n^o 2 (mai 1989) : 230–36. http://dx.doi.org/10.1177/002224378902600209.

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Most approaches to examining the effects of marketing variables on market shares treat the market as a single aggregate. Examining the marketing effects at the segment level would be more useful managerially. Recently, Grover and Srinivasan proposed that a market segment be defined as a group of consumers homogeneous in terms of the probabilities of choosing the different brands in a product class. The market is thereby segmented into brand loyal segments and multiple switching segments. The authors extend this approach to allow the within-switching-segment market shares to vary across periods. The changes over time in within-segment market shares are related to marketing variables such as price and promotion through a logit model. Application of the model to data from a scanner panel shows that the proposed approach produces a modest improvement in predictive validity in comparison with the traditional approach of treating the market as a single aggregate.

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Grover, Rajiv, et V. Srinivasan. « An Approach for Tracking Within-Segment Shifts in Market Shares ». Journal of Marketing Research 26, n^o 2 (mai 1989) : 230. http://dx.doi.org/10.2307/3172609.

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Chinthammit, Winyu, Eric J. Seibel et Thomas A. Furness. « A Shared-Aperture Tracking Display for Augmented Reality ». Presence : Teleoperators and Virtual Environments 12, n^o 1 (février 2003) : 1–18. http://dx.doi.org/10.1162/105474603763835305.

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The operation and performance of a six degree-of-freedom (DOF) shared-aperture tracking system with image overlay is described. This unique tracking technology shares the same aperture or scanned optical beam with the visual display, virtual retinal display (VRD). This display technology provides high brightness in an AR helmet-mounted display, especially in the extreme environment of a military cockpit. The VRD generates an image by optically scanning visible light directly to the viewer's eye. By scanning both visible and infrared light, the head-worn display can be directly coupled to a head-tracking system. As a result, the proposed tracking system requires minimal calibration between the user's viewpoint and the tracker's viewpoint. This paper demonstrates that the proposed shared-aperture tracking system produces high accuracy and computational efficiency. The current proof-of-concept system has a precision of +/− 0.05 and +/− 0.01 deg. in the horizontal and vertical axes, respectively. The static registration error was measured to be 0.08 +/− 0.04 and 0.03 +/− 0.02 deg. for the horizontal and vertical axes, respectively. The dynamic registration error or the system latency was measured to be within 16.67 ms, equivalent to our display refresh rate of 60 Hz. In all testing, the VRD was fixed and the calibrated motion of a robot arm was tracked. By moving the robot arm within a restricted volume, this real-time shared-aperture method of tracking was extended to six-DOF measurements. Future AR applications of our shared-aperture tracking and display system will be highly accurate head tracking when the VRD is helmet mounted and worn within an enclosed space, such as an aircraft cockpit.

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Lee, Stephen, et Giacomo Morri. « Real estate fund active management ». Journal of Property Investment & ; Finance 33, n^o 6 (7 septembre 2015) : 494–516. http://dx.doi.org/10.1108/jpif-06-2014-0043.

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Purpose – The purpose of this paper is to analyse the performance of UK property funds using the dual sources of active management, Active Share and tracking error, to distinguish between the types of active management styles used by funds. Design/methodology/approach – The authors use data on 38 UK real estate funds and classify them into five active management categories using the dual sources of active management, Active Share and tracking error. Then, the authors compare their return performance against Active Share, tracking error, fund size and leverage. Therefore the paper is able to answer two of the fundamental questions of investment: does active management add value and what form of active management, stock selection or factor risk, is better at adding value to the fund? Findings – There are three main conclusions. First, the approach of Cremers and Petajisto (2009) and Petajisto (2010) is able to classify real estate funds in the UK on their management activity into categories that makes intuitive sense and seem stable over time. Second, balanced funds show relatively low Active Shares and particularly low tracking errors, due to the benefits of property-type diversification. In contrast, specialists funds display higher Active Shares and both low and high tracking errors depending on their stock-picking approach; diversified or concentrated. Third, an analysis over different time periods confirmed that funds in the sample essentially remained in the same categories within the sample period, even during markedly different market return periods. This implies that investors need to constantly monitor changes in the market and switch between fund management styles, if at all possible. Research limitations/implications – The analysis was only based on 38 funds with complete data over the sample period and the relationship between fees and active management was not examined, even though ultimately investors are concerned with returns after management fee. It would be instructive therefore if the number of funds and time period was expanded to see if the results are robust and to see whether management fees outweigh the benefits of active manager. Practical implications – The findings should enable investors to make a more informed investment decisions in the future. Originality/value – To the best of the author’s knowledge this is the first paper to apply the dual sources of active management, Active Share and tracking error, in the UK real estate market.

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Děchtěrenko, Filip, Daniela Jakubková, Jiří Lukavský et Christina J. Howard. « Tracking multiple fish ». PeerJ 10 (3 mars 2022) : e13031. http://dx.doi.org/10.7717/peerj.13031.

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Although the Multiple Object Tracking (MOT) task is a widely used experimental method for studying divided attention, tracking objects in the real world usually looks different. For example, in the real world, objects are usually clearly distinguishable from each other and also possess different movement patterns. One such case is tracking groups of creatures, such as tracking fish in an aquarium. We used movies of fish in an aquarium and measured general tracking performance in this task (Experiment 1). In Experiment 2, we compared tracking accuracy within-subjects in fish tracking, tracking typical MOT stimuli, and in a third condition using standard MOT uniform objects which possessed movement patterns similar to the real fish. This third condition was added to further examine the impact of different motion characteristics on tracking performance. Results within a Bayesian framework showed that tracking real fish shares similarities with tracking simple objects in a typical laboratory MOT task. Furthermore, we observed a close relationship between performance in both laboratory MOT tasks (typical and fish-like) and real fish tracking, suggesting that the commonly used laboratory MOT task possesses a good level of ecological validity.

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Ahmed, Ammar Shihab. « The role of pairing the RSI and the Japanese candlestick in making sure to choose the right time to sell and purchasing the stock Applied in a selected sample of companies listed in the Iraqi Stock Exchange ». Journal of University of Human Development 5, n^o 1 (23 janvier 2019) : 61. http://dx.doi.org/10.21928/juhd.v5n1y2019.pp61-71.

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The issue of determining the appropriate timing for the decisions of buying and selling shares is one of the most important topics and the concern of all investors in the stock market, whether they are natural or Morality persons . This interest has been generated by many of those interested in technical analysis to invent techniques, methods and indicators for the purpose of analyzing the performance of the stock market. Maximize the chances of profit and reduce the chances of loss, and investors suffer from the problem of choosing the right time to conduct the sale or purchase of shares of different sectors and companies, and contribute technical analysis techniques in tracking the movement of the prices of those shares to indicate their direction If it is in the case of continuous rise or in the case of continuous decline, if the trend of the movement of shares in the case of continuous rise, this rise will not continue to the end must come a period of time in which prices fluctuate and change direction downward and vice versa in the case of continuous decline, Technical analysis techniques that move through the different graphics and shapes we can use and make use of in the timing of buying and selling shares. There are a lot of technical analysis techniques including Japanese candlesticks, RSI and many more, but important when we want to use We need to use at least two analytical techniques in order to avoid uncertainty in determining the real market trends and thus making the right investment decision, whether it is the sale of shares and the analysis of the mechanism of supply and demand.

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Kim, Eun-Hee, Han-Saeng Kim et Ki-Won Lee. « Range Dividing MIMO Waveform for Improving Tracking Performance ». Sensors 21, n^o 21 (2 novembre 2021) : 7290. http://dx.doi.org/10.3390/s21217290.

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A multiple-input multiple-output (MIMO) method that shares the same frequency band can efficiently increase radar performance. An essential element of a MIMO radar is the orthogonality of the waveform. Typically, orthogonality is obtained by spreading different signals into divided domains such as in time-domain multiplexing, frequency-domain multiplexing, and code domain multiplexing. This paper proposes a method of spreading the interference signals outside the range bins of interest for pulse doppler radars. This is achieved by changing the pulse repetition frequency under certain constraints, and an additional gain can be obtained by doppler processing. This method is very effective for improving the angular accuracy of the MIMO radar for a small number of air targets, although it may have limitations in use for many targets or in high clutter environments.

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Sholihah, Nurlailiyah Aidatus, et Nurlaeli Fatmah. « Perkembangan Wakaf Saham dan Regulasinya di Indonesia ». Ta'amul : Journal of Islamic Economics 1, n^o 1 (10 novembre 2022) : 44–53. http://dx.doi.org/10.58223/taamul.v1i1.4.

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This paper aims to analyze the development of share waqf in Indonesia and the regulation of legal certainty in the implementation of share waqf. This research method uses qualitative methods with literature study as the approach. Source of data in the form of library publications. The type of data is in the form of written narratives or documents contained in publication sources. Data collection techniques are carried out by tracking the sources of these publications. The data analysis technique is descriptive. This article finds that share waqf in Indonesia has developed from 2019 to 2020 since the idea of its presence. This can be seen based on the nominal number of shares waqf in institutions that have obtained legal legality. However, the regulations that form the legal basis for the implementation of share waqf do not yet have rules that specifically regulate share waqf in detail. The rules used are limited to the explanation of cash waqf and general productive waqf.

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García, Fernando, Francisco Guijarro et Ismael Moya. « A MULTIOBJECTIVE MODEL FOR PASSIVE PORTFOLIO MANAGEMENT : AN APPLICATION ON THE S&P 100 INDEX ». Journal of Business Economics and Management 14, n^o 4 (23 septembre 2013) : 758–75. http://dx.doi.org/10.3846/16111699.2012.668859.

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Index tracking seeks to minimize the unsystematic risk component by imitating the movements of a reference index. Partial index tracking only considers a subset of the stocks in the index, enabling a substantial cost reduction in comparison with full tracking. Nevertheless, when heterogeneous investment profiles are to be satisfied, traditional index tracking techniques may need different stocks to build the different portfolios. The aim of this paper is to propose a methodology that enables a fund's manager to satisfy different clients’ investment profiles but using in all cases the same subset of stocks, and considering not only one particular criterion but a compromise between several criteria. For this purpose we use a mathematical programming model that considers the tracking error variance, the excess return and the variance of the portfolio plus the curvature of the tracking frontier. The curvature is not defined for a particular portfolio, but for all the portfolios in the tracking frontier. This way funds’ managers can offer their clients a wide range of risk-return combinations just picking the appropriate portfolio in the frontier, all of these portfolios sharing the same shares but with different weights. An example of our proposal is applied on the S&P 100.

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Du, Xiaochuan, et Kara M. Kockelman. « Tracking Transportation and Industrial Production across a Nation ». Transportation Research Record : Journal of the Transportation Research Board 2269, n^o 1 (janvier 2012) : 99–109. http://dx.doi.org/10.3141/2269-12.

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With the Freight Analysis Framework as its primary data source, the RUBMRIO (random utility–based multiregional input–output) model is applied for U.S. transportation, production, and trade across more than 3,000 contiguous counties. Driven by foreign export demand, RUBMRIO uses input–output expenditure shares and a nested logit model for shipment origins and mode to simulate trade patterns of commodities among the counties. Network and export demand scenarios were examined for their effects on the distribution of trade flows and production. Changes in export demands for various commodities highlighted the importance of food and petroleum manufacturing sectors in production and labor-expenditure shifts. Transport cost reductions had greater effects on total production than did similar cost increases. The most affected U.S. counties were those centrally located. Changes in travel times along the I-40 corridor had ripple effects on trade patterns everywhere with the greatest changes observed around the corridor's midpoint.

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Møller-Jensen, Jakob, et Kenn Gerdes. « Plasmid segregation : spatial awareness at the molecular level ». Journal of Cell Biology 179, n^o 5 (26 novembre 2007) : 813–15. http://dx.doi.org/10.1083/jcb.200710192.

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In bacteria, low-copy number plasmids ensure their stable inheritance by partition loci (par), which actively distribute plasmid replicates to each side of the cell division plane. Using time-lapse fluorescence microscopic tracking of segregating plasmid molecules, a new study provides novel insight into the workings of the par system from Escherichia coli plasmid R1. Despite its relative simplicity, the plasmid partition spindle shares characteristics with the mitotic machinery of eukaryotic cells.

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Carlson, Edward A., Pierre-Philippe J. Beaujean et Edgar An. « Location-Aware Source Routing Protocol for Underwater Acoustic Networks of AUVs ». Journal of Electrical and Computer Engineering 2012 (2012) : 1–18. http://dx.doi.org/10.1155/2012/765924.

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Acoustic networks of autonomous underwater vehicles (AUVs) cannot typically rely on protocols intended for terrestrial radio networks. This work describes a new location-aware source routing (LASR) protocol shown to provide superior network performance over two commonly used network protocols—flooding and dynamic source routing (DSR)—in simulation studies of underwater acoustic networks of AUVs. LASR shares some features with DSR but also includes an improved link/route metric and a node tracking system. LASR also replaces DSR's shortest-path routing with the expected transmission count (ETX) metric. This allows LASR to make more informed routing decisions, which greatly increases performance compared to DSR. Provision for a node tracking system is another novel addition: using the time-division multiple access (TDMA) feature of the simulated acoustic modem, LASR includes a tracking system that predicts node locations, so that LASR can proactively respond to topology changes. LASR delivers 2-3 times as many messages as flooding in 72% of the simulated missions and delivers 2–4 times as many messages as DSR in 100% of the missions. In 67% of the simulated missions, LASR delivers messages requiring multiple hops to cross the network with 2–5 times greater reliability than flooding or DSR.

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Osterhoff, Friedrich, et Christoph Kaserer. « Determinants of tracking error in German ETFs – the role of market liquidity ». Managerial Finance 42, n^o 5 (9 mai 2016) : 417–37. http://dx.doi.org/10.1108/mf-04-2015-0105.

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Purpose – The purpose of this paper is to contribute to a better understanding of the impact of market liquidity on the daily tracking error of exchange-traded funds (ETFs). It puts a special focus on the liquidity cost of individual underlying stocks as well as the process of creation/redemption of ETF shares as key determinants of tracking ability. Design/methodology/approach – The study is based on daily observations of fund data for eight fully replicating German equity ETFs for July 2001-October 2013. A regression model with fund fixed effects is chosen to determine the effect of liquidity cost, creation/redemption and other control variables on daily tracking error. Data were compiled from issuer websites and Datastream. Proprietary XETRA Liquidity Measure, which was used as proxy for liquidity cost was supplied by Deutsche Börse. Findings – The study finds daily tracking error to significantly depend on the liquidity of underlying stocks. This finding emerges even though the ETFs in this study predominantly use in-kind creation/redemption. Even after controlling for creation/redemption, the liquidity impact remains basically unchanged. One reason might be imperfect replication of index weights: Either the in-kind-basket delivered in the course of creation/redemption does not perfectly match the benchmark-weights or the internal rebalancing of weights causes liquidity cost. Originality/value – To the best of the authors’ knowledge, this is the first paper that uses a specific liquidity measure for each single stock underlying an ETF. The findings extend the literature by corroborating the view that liquidity of individual stocks in the underlying portfolio has an impact on tracking error.

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Harden, Tania. « Don’t Unplug : How Technology Saved My Life and Can Save Yours Too ». Journal of Intellectual Freedom & ; Privacy 4, n^o 3 (10 avril 2020) : 12. http://dx.doi.org/10.5860/jifp.v4i3.7125.

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Chris Dancy is a die-hard techie and a self-proclaimed consumption-aholic. Known as “the most connected person on earth” (21), Dancy used up to 700 sensors, devices, applications, and services to monitor, evaluate, and change his life—from his eating habits to his spirituality. Don’t Unplug consists of five main sections covering Dancy’s life from birth to age fifty. He shares a lot of his personal life in the book, which brings out feelings of sympathy, empathy, and pity in the reader. In each of the five sections, Dancy first shares his personal stories, and then offers his take-aways and advice from the experience. Dancy considers himself to have an obsessive and addictive personality. “By 2011, I understood that if a substance or situation could be abused, I would find a way to do so” (53). As you read the lengths Dancy goes to tracking his behaviors, it leaves you in no doubt that he did tend to take things to the extreme in every instance.

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Torous, John, et Spencer Roux. « Patient-Driven Innovation for Mobile Mental Health Technology : Case Report of Symptom Tracking in Schizophrenia ». JMIR Mental Health 4, n^o 3 (6 juillet 2017) : e27. http://dx.doi.org/10.2196/mental.7911.

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This patient perspective piece presents an important case at the intersection of mobile health technology, mental health, and innovation. The potential of digital technologies to advance mental health is well known, although the challenges are being increasingly recognized. Making mobile health work for mental health will require broad collaborations. We already know that those who experience mental illness are excited by the potential technology, with many actively engaged in research, fundraising, advocacy, and entrepreneurial ventures. But we don’t always hear their voice as often as others. There is a clear advantage for their voice to be heard: so we can all learn from their experiences at the direct intersection of mental health and technology innovation. The case is cowritten with an individual with schizophrenia, who openly shares his name and personal experience with mental health technology in order to educate and inspire others. This paper is the first in JMIR Mental Health’s patient perspective series, and we welcome future contributions from those with lived experience.

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Bano, Yasmeen, et S. Vasantha. « Performance Analysis of the Index Mutual Fund ». Asian Journal of Managerial Science 8, n^o 1 (5 février 2019) : 1–5. http://dx.doi.org/10.51983/ajms-2019.8.1.1472.

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A mutual fund is a professionally managed investment fund that pools together the savings of a number of investors who shares the common financial goals. These investors may be retail or institutional in nature. It offers small or individual investors access to professionally managed portfolios of equities, bonds and other securities. The paper is the study of the performance of Index fund. This is analyzed empirically since the period of 2012 – 2017. The main objective of this research is to evaluate the performance of Index funds. The study examined three parameters such as active returns, tracking error and Jensen’s alpha. In this paper the data has been collected from the secondary sources.

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Frijns, Bart, et Ivan Indriawan. « On the ability of New Zealand actively managed funds to generate outperformance in their domestic equity allocations ». Pacific Accounting Review 30, n^o 4 (5 novembre 2018) : 463–81. http://dx.doi.org/10.1108/par-10-2017-0079.

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Purpose This paper aims to assess the ability of New Zealand (NZ) actively managed funds to generate risk-adjusted outperformance using portfolio holdings data. Focusing on domestic equity allocations addresses the benchmark selection issue, particularly for funds with national and international exposures. Design/methodology/approach The authors assess performance using several asset pricing models including the CAPM, three-factor and four-factor models. The authors also assess performance across funds with different characteristics such as fund size, size of local holdings, type of fund provider, past returns and fees. The authors further examine whether funds engage in any stock-picking or market timing by considering the active share and tracking error. Findings The returns on NZ equity holdings of NZ actively managed funds from 2010 to 2017 provide little evidence of risk-adjusted outperformance and stock-picking skill. These exposures yield pre-cost returns that have a nearly perfect correlation with the market index and an insignificant alpha. Funds show little tendency to bet on any of the main characteristics known to predict stock returns, such as size, book-to-market and momentum. In addition, the authors show that the average active shares and tracking errors are low, suggesting that the majority of funds hold NZ equity portfolios that closely mimic the market index. Originality/value Existing studies rely on returns data which aggregate performance across all asset classes with varying exposures. This may lead to benchmark selection issues (particularly for funds with international exposures) which may obscure the fund manager’s true stock-picking skills. Assessment using holdings data would enable suitable performance measurement by researchers and industry analysts.

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E, Geetha, Iqbal Thonse Hawaldar, Vidya Bai G, Suhan Mendon et Rajesha Thekkekutt Mathukutti. « Are global Exchange Traded Fund pretentious on exchange rate fluctuation ? A study using GARCH model ». Investment Management and Financial Innovations 17, n^o 4 (17 décembre 2020) : 356–66. http://dx.doi.org/10.21511/imfi.17(4).2020.30.

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Investors invest in a foreign market to reap the benefits of currency differences. The change in the value of underlying assets affects these hedged funds and, at the same time, restricts investors from higher return possible in unhedged funds. This study aims to examine the performance of most actively traded shares in Exchange Traded Fund and any influence, along with tracking the information from the index. This study also analyzes the currency fluctuation and its impact on returns and volatility of ETF and index. The equity ETF, which tracks NASDAQ (NDX 100), is chosen for the study, and the data analysis is carried out using statistical methods such as correlation, regression, and GARCH model. The study utilizes the currency rate data from 2013 to 2018 of USD, GBP, and INR and examines its effect on the NDX (NASDAQ). The study emphasizes whether the ETF as a basket of securities is insensitive to currency rate fluctuations. It is found that the response of ETF to the currency movements is likely due to its underlying index. The study concludes that Motilal Oswal shares in NASDAQ 100 ETF are highly sensitive to the NDX 100 movements; thus, there is no direct impact between ETF and index performance through exchange rate fluctuation.

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Perez, Oriana, Anil Kumar Vadathya, Alicia Beltran, R. Matthew Barnett, Olivia Hindera, Tatyana Garza, Salma M. Musaad et al. « The Family Level Assessment of Screen Use–Mobile Approach : Development of an Approach to Measure Children’s Mobile Device Use ». JMIR Formative Research 6, n^o 10 (21 octobre 2022) : e40452. http://dx.doi.org/10.2196/40452.

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Background There is a strong association between increased mobile device use and worse dietary habits, worse sleep outcomes, and poor academic performance in children. Self-report or parent-proxy report of children’s screen time has been the most common method of measuring screen time, which may be imprecise or biased. Objective The objective of this study was to assess the feasibility of measuring the screen time of children on mobile devices using the Family Level Assessment of Screen Use (FLASH)–mobile approach, an innovative method that leverages the existing features of the Android platform. Methods This pilot study consisted of 2 laboratory-based observational feasibility studies and 2 home-based feasibility studies in the United States. A total of 48 parent-child dyads consisting of a parent and child aged 6 to 11 years participated in the pilot study. The children had to have their own or shared Android device. The laboratory-based studies included a standardized series of tasks while using the mobile device or watching television, which were video recorded. Video recordings were coded by staff for a gold standard comparison. The home-based studies instructed the parent-child dyads to use their mobile device as they typically use it over 3 days. Parents received a copy of the use logs at the end of the study and completed an exit interview in which they were asked to review their logs and share their perceptions and suggestions for the improvement of the FLASH-mobile approach. Results The final version of the FLASH-mobile approach resulted in user identification compliance rates of >90% for smartphones and >80% for tablets. For laboratory-based studies, a mean agreement of 73.6% (SD 16.15%) was achieved compared with the gold standard (human coding of video recordings) in capturing the target child’s mobile use. Qualitative feedback from parents and children revealed that parents found the FLASH-mobile approach useful for tracking how much time their child spends using the mobile device as well as tracking the apps they used. Some parents revealed concerns over privacy and provided suggestions for improving the FLASH-mobile approach. Conclusions The FLASH-mobile approach offers an important new research approach to measure children’s use of mobile devices more accurately across several days, even when the child shares the device with other family members. With additional enhancement and validation studies, this approach can significantly advance the measurement of mobile device use among young children.

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Tian, ZiJian, XiaoWei Gong, FangYuan He, JiaLuan He et XuQi Wang. « Compressed sensing grid-based target stepwise location method in underground tunnel ». Sensor Review 40, n^o 4 (11 avril 2020) : 397–405. http://dx.doi.org/10.1108/sr-12-2019-0303.

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Purpose To solve the problem that the traditional received signal strength indicator real-time location method does not test the attenuation characteristics of the electromagnetic wave transmission in the location area, which cannot guarantee the accuracy of the location, resulting in a large location error. Design/methodology/approach At present, the compressed sensing (CS) reconstruction algorithm can be roughly divided into the following two categories (Zhouzhou and Fubao, 2014; Lagunas et al., 2016): one is the greedy iterative algorithm proposed for combinatorial optimization problems, which includes matching pursuit algorithm (MP), positive cross matching tracking algorithm (OMP), greedy matching tracking algorithm, segmented orthogonal matching tracking algorithm (StOMP) and so on. The second kind is the convex optimization algorithm, which also called the optimization approximation method. The common method is the basic tracking algorithm, which uses the norm instead of the norm to solve the optimization problem. In this paper, based on the piecewise orthogonal MP algorithm, the improved StOMP reconstruction algorithm is obtained. Findings In this paper, the MP algorithm (OMP), the StOMP and the improved StOMP algorithm are used as simulation reconstruction algorithms to achieve the comparison of location performance. It can be seen that the estimated position of the target is very close to the original position of the target. It is concluded that the CS grid-based target stepwise location method in underground tunnel can accurately locate the target in such specific region. Originality/value In this paper, the offline fingerprint database in offline phase of location method is established and the measurement of the electromagnetic noise distribution in different localization areas is considered. Furthermore, the offline phase shares the work of the location process, which greatly reduces the algorithm complexity of the online phase location process and the power consumption of the reference node, meanwhile is easy to implement under the same conditions, as well as conforms to the location environment.

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Farsoni, Saverio, Jacopo Rizzi, Giulia Nenna Ufondu et Marcello Bonfè. « Planning Collision-Free Robot Motions in a Human–Robot Shared Workspace via Mixed Reality and Sensor-Fusion Skeleton Tracking ». Electronics 11, n^o 15 (1 août 2022) : 2407. http://dx.doi.org/10.3390/electronics11152407.

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The paper describes a method for planning collision-free motions of an industrial manipulator that shares the workspace with human operators during a human–robot collaborative application with strict safety requirements. The proposed workflow exploits the advantages of mixed reality to insert real entities into a virtual scene, wherein the robot control command is computed and validated by simulating robot motions without risks for the human. The proposed motion planner relies on a sensor-fusion algorithm that improves the 3D perception of the humans inside the robot workspace. Such an algorithm merges the estimations of the pose of the human bones reconstructed by means of a pointcloud-based skeleton tracking algorithm with the orientation data acquired from wearable inertial measurement units (IMUs) supposed to be fixed to the human bones. The algorithm provides a final reconstruction of the position and of the orientation of the human bones that can be used to include the human in the virtual simulation of the robotic workcell. A dynamic motion-planning algorithm can be processed within such a mixed-reality environment, allowing the computation of a collision-free joint velocity command for the real robot.

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Quiroz-Morales, Sara E., Selene García-Reyes, Gabriel Yaxal Ponce-Soto, Luis Servín-González et Gloria Soberón-Chávez. « Tracking the Origins of Pseudomonas aeruginosa Phylogroups by Diversity and Evolutionary Analysis of Important Pathogenic Marker Genes ». Diversity 14, n^o 5 (28 avril 2022) : 345. http://dx.doi.org/10.3390/d14050345.

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Pseudomonas aeruginosa is a widespread environmental bacterium and an opportunistic pathogen that represents a health hazard due to its production of virulence factors and its high antibiotic resistance. The genome of most of the strains belonging to this bacterial species is highly conserved, and genes coding for virulence-associated traits are part of the species core-genome. Recently, the existence of phylogroups has been documented based on the analysis of whole genome sequences of hundreds of isolates. These clades contain both clinical and environmental strains, which show no particular geographical distribution. The major phylogroups (clades 1 and 2) are characterized by the nearly mutually exclusive production of the virulence effectors secreted by the type three secretion system (T3SS) ExoS and ExoU, respectively. Clade 3 is the most genetically diverse and shares with clade 5, which is closely related to clades 1 and 2, the production of the pore-forming exolysin A, and the lack of T3SS, among other characteristics. Here we analyze the 4955 P. aeruginosa genomes deposited in the Pseudomonas Genome Database and present some hypotheses on the origins of four of the five phylogroups of this bacterial species.

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Ferris, Emily B., Katarzyna Wyka, Kelly R. Evenson, Joan M. Dorn, Lorna Thorpe, Diane Catellier et Terry T.-K. Huang. « Recruitment and Retention Strategies for Community-Based Longitudinal Studies in Diverse Urban Neighborhoods ». JMIR Formative Research 5, n^o 3 (24 mars 2021) : e18591. http://dx.doi.org/10.2196/18591.

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Longitudinal, natural experiments provide an ideal evaluation approach to better understand the impact of built environment interventions on community health outcomes, particularly health disparities. As there are many participant engagement challenges inherent in the design of large-scale community-based studies, adaptive and iterative participant engagement strategies are critical. This paper shares practical lessons learned from the Physical Activity and Redesigned Community Spaces (PARCS) study, which is an evaluation of the impact of a citywide park renovation initiative on physical activity, psychosocial health, and community well-being. The PARCS study, although ongoing, has developed several approaches to improve participant engagement: building trust with communities, adapting the study protocol to meet participants’ needs and to reflect their capacity for participation, operational flexibility, and developing tracking systems. These strategies may help researchers anticipate and respond to participant engagement challenges in community-based studies, particularly in low-income communities of color.

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Romanov, Aleksey A., Boris A. Gusev, Egor V. Leonenko, Anastasia N. Tamarovskaya, Alexander S. Vasiliev, Nikolai E. Zaytcev et Ilia K. Philippov. « Graz Lagrangian Model (GRAL) for Pollutants Tracking and Estimating Sources Partial Contributions to Atmospheric Pollution in Highly Urbanized Areas ». Atmosphere 11, n^o 12 (19 décembre 2020) : 1375. http://dx.doi.org/10.3390/atmos11121375.

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Computational modeling allows studying the air quality problems in depth and provides the best solution reducing the population risks. This research demonstrates the Graz Lagrangian model effectiveness for assessing emission sources contributions to the air pollution: particles tracking and accumulation estimate. The article describes model setting up parameters and datasets preparation for the analysis. The experiment simulated the dispersion from the main groups of emission sources for real weather conditions during 96 h of December 2018, when significant excess of NO2, CO, SO2, PM10, and benzo(a)pyrene concentrations were observed in the Krasnoyarsk surface atmospheric layer. The computational domain was a parallelepiped of 40 × 30 × 2.5 km, which was located deep inside the Eurasian continent on a heterogeneous landscape exaggerated by high-rise buildings, with various pollutions sources and the ice-free Yenisei River. The results demonstrated an excellent applicability of the Lagrange model for hourly tracking of particle trajectories, taking into account the urban landscape. For values <1 MPC (maximum permissible concentration) of peak pollutants concentrations, the coincidences were 93 cases, and for values < 0.1 shares of MPC, there were 36 cases out of the total number of 97. The same was found for the average daily concentration for values <1 MPC—31, and for values <0.1 MPC—5 matches out of 44. Wind speeds COR—65.3%, wind directions COR—68.6%. The Graz Lagrangian model showed the ability to simulate air quality problems in the Krasnoyarsk greater area conditions.

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Hariyanti, Tatit. « Pancasila as the cultural traits for Indonesian national religious identity in the era of globalization ». EduLite : Journal of English Education, Literature and Culture 5, n^o 2 (31 août 2020) : 359. http://dx.doi.org/10.30659/e.5.2.359-368.

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This paper is library research attempting to explore the way to maintain the local identity in globalization for Indonesian particularly their national religious identity. Taking and tracking documents in the form of data relating to the issues of globalization, religious identity, and� Pancasila and adopting the concept of grounded globalism by James L. Peacock which affirms and seeks embodied connectedness to locale, this paper shares the perspective that Pancasila is still qualified and deserve to be used as a basic foundation to maintain and strengthen the national religious identity of the Indonesian people in the global era. Indonesia does not need to be transformed by global identity. Indonesia has already had its own national religious identity which is global. The five principles of Pancasila need to be actualized as the ground and cultural traits of their global identity. By grounding global identity on Pancasila, Indonesians can enjoy globalization without losing its national identity.

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Heitmann, Mark, Jan R. Landwehr, Thomas F. Schreiner et Harald J. van Heerde. « Leveraging Brand Equity for Effective Visual Product Design ». Journal of Marketing Research 57, n^o 2 (5 mars 2020) : 257–77. http://dx.doi.org/10.1177/0022243720904004.

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For many consumer goods, the visual appearance is a vital determinant of market success. Although there is an emerging literature on how objective design characteristics drive consumer preferences, this literature has not yet taken into account that product design happens in the context of a brand’s equity. This research addresses the question of how to leverage brand equity when designing the visual appearance of a product. Specifically, it investigates the role of two key strategic visual design decisions: brand typicality (similarity within the brand’s range) and segment typicality (similarity to the competitive set). Drawing on fluency theory, the authors argue that high-equity brands benefit more from brand typicality but less from segment typicality than low-equity brands. Using data from the U.S. car market tracking market shares of 456 car models of 39 major brands operating in seven market segments across 13 years, the study provides empirical evidence for this conjecture and, thereby, implications for strategic product design and visual design theory.

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Manning, Carrie, et Ian Smith. « Electoral Performance by Post-Rebel Parties ». Government and Opposition 54, n^o 3 (5 novembre 2018) : 415–53. http://dx.doi.org/10.1017/gov.2018.34.

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This article explores the factors affecting post-rebel party electoral performance. We present new research tracking the participation of these groups in national legislative elections from 1990 to 2016. Our full data set covers 77 parties and 286 elections in 37 countries. It includes parties formed after conflicts of varying length and intensity, with different incompatibilities, in every region of the world, and in countries with disparate political histories. Our analysis suggests that post-rebel parties’ early electoral performance strongly affects future performance, and that competition – crowd-out by older rival parties – and pre-war organizational experience in politics have a significant positive effect, particularly for those parties that are consistently winning more than about 10 per cent of seats. But especially for parties that consistently win very low seat shares, organizational characteristics yield increasingly to environmental factors, most importantly the presence of rival parties and the barriers to representation presented by electoral rules.

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Medina Villanueva, Samantha, Luis Tomás Ródenas Cuenca, Minerva Thalía Juno Vanegas Farfano, Luis Bernardo Bojorquez Castro et José Leandro Tristán Rodríguez. « Comparación de carga externa en las acciones de alta velocidad en partidos y entrenamientos en un equipo de fútbol base (External load comparison in high-speed actions on matches and workouts on a base soccer team) ». Retos 46 (23 septembre 2022) : 1022–27. http://dx.doi.org/10.47197/retos.v46.93362.

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El objetivo de este estudio fue encontrar las diferencias existentes entre la carga externa en las acciones de alta velocidad (AAV+) en partidos y entrenamientos en un equipo juvenil de nivel base. Para referirnos a los indicadores de AAV+ se tomaron en cuenta aquellas acciones donde los futbolistas superaran y mantuvieran durante al menos un segundo los 23 km/h Se monitorizaron a 10 jugadores pertenecientes al equipo de futbol juvenil base del municipio de Guasave, Sinaloa, México y se usaron para el estudio 10 dispositivos GPS (SPT, spots performance tracking). Los resultados de nuestro estudio arrojaron datos que demostraron que los futbolistas realizaron de manera sustancial más AAV+ de 1s, 2s, 3s y hasta 4s, durante los partidos que durante los entrenamientos. Palabras clave. GPS, velocidad máxima, fútbol, distancia recorrida, jóvenes. Abstract. The purpose of this study was to find the differences between the high-velocity actions external load (AAV +) in match and training sessions on a base-level youth team. To refer to the AAV + indicators, those shares were considered where footballers exceed and maintained for at least 1 second 23 km/h 10 players were monitored belonging to the baseball team of the Municipality of Guasave, Sinaloa, Mexico and 10 GPS devices (SPT, Sports Performance Tracking) were used for the study. The results of our study yielded data that showed footballers made more AAV + of 1s, 2s, 3s and up to 4s, during the match that during the training sessions. Keywords: GPS, maximum speed, soccer, distance traveled, youths.

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Chen, Hsuan-Chu, Chun-Chia Wang, Jason C. Hung et Cheng-Yu Hsueh. « Employing Eye Tracking to Study Visual Attention to Live Streaming : A Case Study of Facebook Live ». Sustainability 14, n^o 12 (20 juin 2022) : 7494. http://dx.doi.org/10.3390/su14127494.

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In recent years, the COVID-19 pandemic has led to the development of a new business model, “Live Streaming + Ecommerce”, which is a new method for commercial sales that shares the goal of sustainable economic growth (SDG 8). As information technology finds its way into the digital lives of internet users, the real-time and interactive nature of live streaming has overturned the traditional entertainment experience of audio and video content, moving towards a more nuanced division of labor with multiple applications. This study used a portable eye tracker to collect eye movement information from participants watching Facebook Live, with 31 participants who had experience using the live streaming platform. The four eye movement indicators, namely, latency of first fixation (LFF), duration of first fixation (DFF), total fixation durations (TFD), and the number of fixations (NOF), were used to analyze the distribution of the visual attention in each region of interest (ROI) and explore the study questions based on the ROIs. The findings of this study were as follows: (1) the fixation order of the ROIs in the live ecommerce platform differed between participants of different sexes; (2) the DFF of the ROIs in the live ecommerce platform differed among participants of different sexes; and (3) regarding the ROIs of participants on the live ecommerce platform, participants of different sexes showed the same attention to the live products according to the TFD and NOF eye movement indicators. This study explored the visual search behaviors of existing consumers watching live ecommerce and provides the results as a reference for operators and researchers of live streaming platforms.

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Meneghetti, Luiz Henrique, Edivan Laercio Carvalho, Emerson Giovani Carati, Gustavo Weber Denardin, Jean Patric da Costa, Carlos Marcelo de Oliveira Stein et Rafael Cardoso. « Hybrid Inverter and Control Strategy for Enabling the PV Generation Dispatch Using Extra-Low-Voltage Batteries ». Energies 15, n^o 20 (13 octobre 2022) : 7539. http://dx.doi.org/10.3390/en15207539.

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This paper proposes a dispatchable photovoltaic (PV) hybrid inverter for output power tracking without any dependency on the converter’s efficiency and with no power closed loop. The system uses an extra-low-voltage battery energy storage system (BEES) based on a Li-ion battery pack to be applicable for use inside homes and other installations close to the end-user. A bidirectional isolated current-fed dual-active bridge (CF-DAB) converter associated with the batteries provides a wide conversion voltage ratio and ensures safety for the users. The proposed control system shares the DC bus voltage controller between the ac grid interfacing converter (AC-DC) and CF-DAB (DC-DC), eliminating the converter’s efficiency in the reference equations. When dispatchable power is not required, or according to the user’s request, the battery’s charge/discharge current can be specified. A disturbance rejection technique avoids low-frequency current ripple on the battery side. It contributes to the battery’s lifespan. Experimental results presenting the dc bus voltage control, current disturbance rejection, and power dispatching are included to validate the proposal.

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Bajars, Erika, Molly Larson-Wakeman, Chris Franzese et Sherri Biondi. « Novel ethnographic/contextual inquiry techniques for understanding connected device users in their native environment ». Proceedings of the International Symposium on Human Factors and Ergonomics in Health Care 6, n^o 1 (15 mai 2017) : 159–66. http://dx.doi.org/10.1177/2327857917061034.

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Pharmaceutical and medical device companies are embracing technology to increase patient engagement and improve adherence to costly and sometimes complex medication therapies. One solution includes developing drug delivery devices that connect to mobile medical applications (MMAs) to support patients in managing and tracking their medications. Developing an adherence system requires understanding users in their use environment, their challenges with taking medications, their health goals, and the behaviors to target for change. Device developers have long relied on in-person ethnography or in-person human factors studies in a research facility to gather these data. Unfortunately, this process is time-consuming, labor intensive, and costly. When considering a rare patient population, collecting data in person becomes even more complex. This work explores how collecting patient data using a remote ethnography platform addresses challenges with in-person studies early in the device development process, and shares a case example of the use of remote ethnography to better understand patients with cystic fibrosis (CF) to design and refine a medication adherence system prior to taking prototypes into in-person testing.

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Babar, Prof Madhuri, Sanket Meshram, Dhanashri Gulhane, Jagdish Kore, Harshad Nikhare et Aditi Salodkar. « ANTI-THEFT ALERT SYSTEM FOR SMART VEHICLES USING MOBILE APP ». International Journal of Engineering Applied Sciences and Technology 6, n^o 6 (1 octobre 2021) : 330–35. http://dx.doi.org/10.33564/ijeast.2021.v06i06.048.

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Theft security of vehicle in common parking places has become a matter to concern. To overcome this problem, we have an idea. There is a system that doesn’t allow tampering with ignition systems of vehicles, it captures the picture of a thief and also shares the location. The system will warn the mobile-phone about the tampering of the vehicles ignition key knob etc. when the parking mode is ON in our app. There is mobile application for warning the owner/mobile-phone. If the vehicle is lifted during parking mode, the app will alert the owner/mobile-phone through the app and also track the vehicle. In 2nd part of system, there is a Feature when an Unknown person allows to tamper with the Vehicle then Pi camera takes a picture and sending to registered application Gmail. There are the functions like this Tampering detection, tampering of ignition wire, attempt to lift, thief attempt to start vehicle without key, App/mobile warning, GPS tracking of vehicle, capturing picture of thief, and extra function apart from mobile application is Image processing system

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Ball, David A., Gunjan D. Mehta, Ronit Salomon-Kent, Davide Mazza, Tatsuya Morisaki, Florian Mueller, James G. McNally et Tatiana S. Karpova. « Single molecule tracking of Ace1p in Saccharomyces cerevisiae defines a characteristic residence time for non-specific interactions of transcription factors with chromatin ». Nucleic Acids Research 44, n^o 21 (26 août 2016) : e160-e160. http://dx.doi.org/10.1093/nar/gkw744.

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Abstract In vivo single molecule tracking has recently developed into a powerful technique for measuring and understanding the transient interactions of transcription factors (TF) with their chromatin response elements. However, this method still lacks a solid foundation for distinguishing between specific and non-specific interactions. To address this issue, we took advantage of the power of molecular genetics of yeast. Yeast TF Ace1p has only five specific sites in the genome and thus serves as a benchmark to distinguish specific from non-specific binding. Here, we show that the estimated residence time of the short-residence molecules is essentially the same for Hht1p, Ace1p and Hsf1p, equaling 0.12–0.32 s. These three DNA-binding proteins are very different in their structure, function and intracellular concentration. This suggests that (i) short-residence molecules are bound to DNA non-specifically, and (ii) that non-specific binding shares common characteristics between vastly different DNA-bound proteins and thus may have a common underlying mechanism. We develop new and robust procedure for evaluation of adverse effects of labeling, and new quantitative analysis procedures that significantly improve residence time measurements by accounting for fluorophore blinking. Our results provide a framework for the reliable performance and analysis of single molecule TF experiments in yeast.

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Sagiraju, Hima Keerthi, et Shashi Mogalla. « Application of multilayer perceptron to deep reinforcement learning for stock market trading and analysis ». Indonesian Journal of Electrical Engineering and Computer Science 24, n^o 3 (1 décembre 2021) : 1759. http://dx.doi.org/10.11591/ijeecs.v24.i3.pp1759-1771.

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Trading strategies to maximize profits by tracking and responding to dynamic stock market variations is a complex task. This paper proposes to use a multilayer perceptron method (a part of artificial neural networks (ANNs)), that can be used to deploy deep reinforcement strategies to learn the process of predicting and analyzing the stock market products with the aim to maximize profit making. We trained a deep reinforcement agent using the four algorithms: proximal policy optimization (PPO), deep Q-learning (DQN), deep deterministic policy gradient (DDPG) method, and advantage actor critic (A2C). The proposed system, comprising these algorithms, is tested using real time stock data of two products: Dow Jones (DJIA-index), and Qualcomm (shares). The performance of the agent linked to the individual algorithms was evaluated, compared and analyzed using Sharpe ratio, Sortino ratio, Skew and Kurtosis, thus leading to the most effective algorithm being chosen. Based on the parameter values, the algorithm that maximizes profit making for the respective financial product was determined. We also extended the same approach to study and ascertain the predictive performance of the algorithms on trading under highly volatile scenario, such as the pandemic coronavirus disease 2019 (COVID-19).

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Ibrahim, Atef, et Fayez Gebali. « Energy-Efficient Word-Serial Processor for Field Multiplication and Squaring Suitable for Lightweight Authentication Schemes in RFID-Based IoT Applications ». Applied Sciences 11, n^o 15 (28 juillet 2021) : 6938. http://dx.doi.org/10.3390/app11156938.

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Radio-Frequency Identification (RFID) technology is a crucial technology used in many IoT applications such as healthcare, asset tracking, logistics, supply chain management, assembly, manufacturing, and payment systems. Nonetheless, RFID-based IoT applications have many security and privacy issues restricting their use on a large scale. Many authors have proposed lightweight RFID authentication schemes based on Elliptic Curve Cryptography (ECC) with a low-cost implementation to solve these issues. Finite-field multiplication are at the heart of these schemes, and their implementation significantly affects the system’s overall performance. This article presents a formal methodology for developing a word-based serial-in/serial-out semisystolic processor that shares hardware resources for multiplication and squaring operations in GF(2n). The processor concurrently executes both operations and hence reduces the execution time. Furthermore, sharing the hardware resources provides savings in the area and consumed energy. The acquired implementation results for the field size n=409 indicate that the proposed structure achieves a significant reduction in the area–time product and consumed energy over the previously published designs by at least 32.3% and 70%, respectively. The achieved results make the proposed design more suitable to realize cryptographic primitives in resource-constrained RFID devices.

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Smith, Karen Louise, et Elysia Guzik. « Developing Privacy Extensions : Is it Advocacy through the Web Browser ? » Surveillance & ; Society 20, n^o 1 (26 mars 2022) : 64–81. http://dx.doi.org/10.24908/ss.v20i1.13958.

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In 2015, Edward Snowden recommended that ordinary citizens use adblocking software and an encryption-oriented privacy extension for their web browser to protect against surveillance. This paper critically explores how the development of privacy extension software for web browsers can be situated in relation to privacy advocacy. Privacy advocates are individuals who act on behalf of the citizenry to speak to governments and corporations about how our data are collected and processed. While the Snowden revelations began in 2013 and the Cambridge Analytica scandal broke in 2018, privacy extensions remain underexplored in the literature on privacy advocacy. This paper shares findings from ethnographically informed interviews conducted with thirty developers and other knowledgeable experts who created twenty-six named privacy extensions. The privacy extensions explored included anti-tracking, hypertext transfer protocol secure (HTTPS), and privacy policy and password-related functionalities. Although privacy extensions are an imperfect set of tools to protect privacy, we argue that production of this software demonstrates an array of privacy advocacy strategies. Privacy extensions can be scaffolded upon previous resistance moves to surveillance by individuals, while also sometimes intersecting with traditional and expanded notions of collective action in the digital age.

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Ruchika Jain and Anu Rathee. « DMRC Location Tracker and Alert System ». International Journal for Modern Trends in Science and Technology 6, n^o 12 (13 décembre 2020) : 253–56. http://dx.doi.org/10.46501/ijmtst061246.

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It is a simple React-Native application used to get an alert before your destined metro station so that you can plan your journey accordingly without the fear of missing the destination. The purpose of this project is to design and construct a hand-held wireless tracking device so that the location of a person can be detected. Other than providing alert the application can also be used for women safety purpose. It focuses on one of the important problems of society that is eve-teasing. It makes the society to be aware of the misbehavior which is happening and to come forward for help. It enables women to be self-dependent and can handle any kind of unpredictable situation. It mainly shares the location based on GPS, (Global Positioning System). Pressing the SOS button it sends the emergency message with time and location to the emergency contacts and metro authorities. When the application triggers on the time of travelling it send the location to the emergency contacts with few images taken by the camera on spot, and a siren rings which gives immediate help.

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Abdelgalil, Leina, et Mohamed Mejri. « HealthBlock : A Framework for a Collaborative Sharing of Electronic Health Records Based on Blockchain ». Future Internet 15, n^o 3 (21 février 2023) : 87. http://dx.doi.org/10.3390/fi15030087.

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Electronic health records (EHRs) play an important role in our life. However, most of the time, they are scattered and saved on different databases belonging to distinct institutions (hospitals, laboratories, clinics, etc.) geographically distributed across one or many countries. Due to this decentralization and the heterogeneity of the different involved systems, medical staff are facing difficulties in correctly collaborating by sharing, protecting, and tracking their patient’s electronic health-record history to provide them with the best care. Additionally, patients have no control over their private EHRs. Blockchain has many promising future uses for the healthcare domain because it provides a better solution for sharing data while preserving the integrity, the interoperability, the availability of the classical client–server architectures used to manage EHRS. This paper proposes a framework called HealthBlock for collaboratively sharing EHRs and their privacy preservation. Different technologies have been combined to achieve this goal. The InterPlanetary File System (IPFS) technology stores and shares patients’ EHRs in distributed off-chain storage and ensures the record’s immutability; Hyperledger Indy gives patients full control over their EHRs, and Hyperledger Fabric stores the patient-access control policy and delegations.

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Fältström, Emma, Kristina Borg Olesen et Stefan Anderberg. « Microplastic Types in the Wastewater System—A Comparison of Material Flow-Based Source Estimates and the Measurement-Based Load to a Wastewater Treatment Plant ». Sustainability 13, n^o 10 (12 mai 2021) : 5404. http://dx.doi.org/10.3390/su13105404.

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Microplastics are omnipresent in the environment, and wastewater treatment plants (WWTPs) have been highlighted as a transport pathway. The aim of this study is to contribute to increased understanding of microplastic sources in wastewater and test the possibilities of source tracking. Previous research has focused either on estimating microplastic contribution from various sources or on quantifying occurrence based on measurements. In this paper, these two approaches are compared. Microplastic types detected in the influent to a WWTP in Sweden are compared with estimations of sources in the WWTP catchment area. The total load from the identified sources was estimated to 1.9–14 tonnes/year, and the measurement-based load was 4.2 tonnes/year. In general, there was a good agreement between the two approaches; microplastic types with large shares at the inlet also had large contributions in the source estimates. An exception was cellulose acetate, which was not found at the inlet despite a large theoretical contribution. Many uncertainties remain, which lead to large intervals for the source estimates. The comparison can give an indication into which part of the intervals is most likely. Investigating more WWTPs with different characteristics and including particle morphology will further increase the understanding of sources that contribute to the presence of microplastics in wastewater.

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Ferreira, Adriana M., Agerdânio A. de Souza, Rosemary de Carvalho R. Koga, Iracirema da S. Sena, Mateus de Jesus S. Matos, Rosana Tomazi, Irlon M. Ferreira et José Carlos T. Carvalho. « Anti-Melanogenic Potential of Natural and Synthetic Substances : Application in Zebrafish Model ». Molecules 28, n^o 3 (20 janvier 2023) : 1053. http://dx.doi.org/10.3390/molecules28031053.

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Melanogenesis is a biosynthetic pathway for the formation of the pigment melanin in human skin. A key enzyme in the process of pigmentation through melanin is tyrosinase, which catalyzes the first and only limiting step in melanogenesis. Since the discovery of its methanogenic properties, tyrosinase has been the focus of research related to the anti-melanogenesis. In addition to developing more effective and commercially safe inhibitors, more studies are required to better understand the mechanisms involved in the skin depigmentation process. However, in vivo assays are necessary to develop and validate new drugs or molecules for this purpose, and to accomplish this, zebrafish has been identified as a model organism for in vivo application. In addition, such model would allow tracking and studying the depigmenting activity of many bioactive compounds, important to genetics, medicinal chemistry and even the cosmetic industry. Studies have shown the similarity between human and zebrafish genomes, encouraging their use as a model to understand the mechanism of action of a tested compound. Interestingly, zebrafish skin shares many similarities with human skin, suggesting that this model organism is suitable for studying melanogenesis inhibitors. Accordingly, several bioactive compounds reported herein for this model are compared in terms of their molecular structure and possible mode of action in zebrafish embryos. In particular, this article described the main metabolites of Trichoderma fungi, in addition to substances from natural and synthetic sources.

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Crul, Maurice, et Jens Schneider. « Children of Turkish Immigrants in Germany and the Netherlands : The Impact of Differences in Vocational and Academic Tracking Systems ». Teachers College Record : The Voice of Scholarship in Education 111, n^o 6 (juin 2009) : 1508–27. http://dx.doi.org/10.1177/016146810911100602.

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Background/Context Much research is being done on Turkish immigrants and their children in Germany and the Netherlands, but almost always from a national perspective. To compare the situation, for example, regarding educational outcomes across the two countries has proved to be very difficult because of different sets, selection criteria, and time periods for statistical data on immigrant populations. However, those data, which are actually available and comparable to at least some degree, already show how strongly the differences in educational attainment and labor market integration of Turkish immigrants depend on structural and systemic differences in the ways that education is organized in Germany and the Netherlands. Purpose/Objective/Research Question/Focus of Study The article analyzes available data on young Turkish immigrants and native-born second generations and their educational success in the two countries with the major Turkish populations in Western Europe. It aims to direct the focus away from group background characteristics, which are actually quite similar, to the influence of institutional arrangements and the way that the educational system facilitates (or not) the educational integration of Turkish youth. Research Design The article is based on publicly collected and available data on the Turkish populations in Germany and the Netherlands. This mainly refers to the Dutch SPVA surveys and the German micro-census and Integration Survey. Conclusions/Recommendations The findings show that more than group characteristics, systemic and institutional factors can have a decisive role in promoting or hampering the educational and labor market integration of young immigrants and the native-born second generation. The greater openness of the Dutch school system to provide “long routes” and “second chances” shows its effect in significantly higher shares of Turks in higher education. On the other side, the dual system of vocational training in Germany seems to be better suited for labor market integration, especially because apprenticeships are more practice oriented and do count as work experience for later application procedures. The Dutch system also offers better opportunities for girls than does the German system. Yet, the polarization effect between “high achievement” and “failure” of only partial integration success is greater in the Netherlands, whereas the overall advancement is slower, but also less polarizing, in Germany. In this sense, each country could learn something from its neighbor regarding those aspects of the institutional and systemic setting that apparently fail to do the job well enough.

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Khudor, Dr Dhamyaa Saad, Dr Ghanim Kadhim Abdulsada et Moumin Mahdi Issa. « Experimental Study of Concentrated Solar Power on Heat Feed Water Heaters in Steam Power Plants in Iraq ». Journal of Petroleum Research and Studies 11, n^o 1 (7 mai 2021) : 137–52. http://dx.doi.org/10.52716/jprs.v11i1.436.

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For generating power, solar energy is counted a good exporter. Iraq is located in a hot zonewith latitude from 32 degree N to 36 degree N. In Iraq, the average solar radiation is about 7kilowatt hours / day.In this work, central receiving tower was used to obtain steam using the available solar energyin summer and winter. To heat the feed water heater of South Baghdad Electrical Steam PowerPlant, steam utilization for this purpose. In the project, manufacturing the central receivertower, which is consisting of 150 mirrors fixed upon 75 manual tracking heliostats arranged forutilization the solar radiation concentrated on the central receiving tank (CRT). Pipes systemswere used for hot water or steam exits from receiver. In this study, the central receiver tank(0.5m*1m) was filled with 157 liter of water. The experimental work was run for one yearfrom June 2015 – May 2016. The outlet temperature of water from central tower receiver wassteam for (July and August 2015) and hot water with high temperature for other months of theyear. The results obtained from our system, solar shares for heating the feed water heater ofSouth Baghdad Electrical Steam Power Plant up to 1.86 % and an annual average of 1.03%.Temperature, power concentration factor and system efficient are greatly influenced by thenumber of heliostats used. A sample of calculations is used to evaluate the mathematical dataof hot water and steam temperatures obtained from this study. These values are approximatewith experimental data when compared together.

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Ryder, Brittany, Tingting Zhang et Nan Hua. « The Social Media “Magic” : Virtually Engaging Visitors during COVID-19 Temporary Closures ». Administrative Sciences 11, n^o 2 (24 mai 2021) : 53. http://dx.doi.org/10.3390/admsci11020053.

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The purpose of this study was to explore what types of digital content cultural institutions implemented during COVID-19 temporary closures and their effects on social media engagement. Existing research identified the role of digital content and social media in cultural institutions, but only in times of normal operations. This study adds to the existing literature by exploring the types of digital content implemented, impacts on social media engagement, measures of social media engagement, and future implications in regard to COVID-19 temporary closures. This study recruited 66 cultural institutions from across the United States to take part in in-depth semi-structured phone interviews to fulfill the research goals. Museums, zoos, aquariums, performing arts organizations, heritage foundations, and historical societies were represented. A qualitative approach was adopted, and content analysis on the interview transcripts indicated that cultural institutions implemented digital content to build communities through live and serialized content, partnerships, fundraising, increased transparency, and increased accessibility during temporary closures. Using primarily Instagram and Facebook with their digital content, cultural institutions increased social media engagement during this time. Although there was no consensus on best practices in measuring social media engagement, many institutions highlighted tracking active engagement such as likes, comments, and shares. As a result of the success of the digital content, cultural institutions planned continued digital content campaigns such as videos, blogs, partnerships, and paid educational content in times of normal operations.

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Osmanoglu, B., M. I. Corcuera, F. J. Navarro, M. Braun et R. Hock. « Frontal ablation and temporal variations in surface velocity of Livingston Island ice cap, Antarctica ». Cryosphere Discussions 7, n^o 4 (26 août 2013) : 4207–40. http://dx.doi.org/10.5194/tcd-7-4207-2013.

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Abstract. Frontal ablation from marine-terminating glaciers and ice caps covering the islands off the western coast of the Antarctic Peninsula is poorly known. Here we estimate the frontal ablation from the ice cap of Livingston Island, the second largest island in the South Shetland Islands archipelago, using glacier surface velocities obtained from intensity offset tracking of PALSAR-1 imagery and glacier ice thickness inferred from principles of glacier dynamics and calibrated against ground-penetrating radar (GPR) measurements of ice thickness. Using 21 SAR images acquired between October 2007 and January 2011, we obtain surface velocities of up to 250 m yr−1 and an average frontal ablation rate of about 509 &pm; 381 Mt yr−1, equivalent to a specific mass change of −0.7 &pm; 0.5 m w.e. yr−1 over the area of the ice cap (697 km2). A rough estimate of the surface mass balance of the ice cap gives 0.1 &pm; 0.1 m w.e. yr−1, resulting in a~total mass balance for Livingston Island ice cap of −0.6 &pm; 0.5 m w.e. yr−1. We find that frontal ablation and surface ablation contribute equal shares to total ablation. We also find large changes in frontal ablation rate (of ∼237 Mt yr−1) due to temporal variability in surface velocities. This highlights the importance of taking into account the seasonality in ice velocities when computing frontal ablation with a flux-gate approach.

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Jacq, Jean-Jose, Cedric Schwartz, Valerie Burdin, Romain Gerard, Christian Lefevre, Christian Roux et Olivier Remy-Neris. « Building and Tracking Root Shapes ». IEEE Transactions on Biomedical Engineering 57, n^o 3 (mars 2010) : 696–707. http://dx.doi.org/10.1109/tbme.2009.2022404.

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Whitt, Maria, Brenda Baird, Patsy Wilbanks et Patti Esmail. « Tracking Decisions With Shared Governance ». Nurse Leader 9, n^o 6 (décembre 2011) : 53–55. http://dx.doi.org/10.1016/j.mnl.2011.06.001.

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Campbell, Dana L., Anne E. Thessen et Leslie Ries. « A novel curation system to facilitate data integration across regional citizen science survey programs ». PeerJ 8 (29 juillet 2020) : e9219. http://dx.doi.org/10.7717/peerj.9219.

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Integrative modeling methods can now enable macrosystem-level understandings of biodiversity patterns, such as range changes resulting from shifts in climate or land use, by aggregating species-level data across multiple monitoring sources. This requires ensuring that taxon interpretations match up across different sources. While encouraging checklist standardization is certainly an option, coercing programs to change species lists they have used consistently for decades is rarely successful. Here we demonstrate a novel approach for tracking equivalent names and concepts, applied to a network of 10 regional programs that use the same protocols (so-called “Pollard walks”) to monitor butterflies across America north of Mexico. Our system involves, for each monitoring program, associating the taxonomic authority (in this case one of three North American butterfly fauna treatments: Pelham, 2014; North American Butterfly Association, Inc., 2016; Opler & Warren, 2003) that shares the most similar overall taxonomic interpretation to the program’s working species list. This allows us to define each term on each program’s list in the context of the appropriate authority’s species concept and curate the term alongside its authoritative concept. We then aligned the names representing equivalent taxonomic concepts among the three authorities. These stepping stones allow us to bridge a species concept from one program’s species list to the name of the equivalent in any other program, through the intermediary scaffolding of aligned authoritative taxon concepts. Using a software tool we developed to access our curation system, a user can link equivalent species concepts between data collecting agencies with no specialized knowledge of taxonomic complexities.

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Vinayak, Pragun, Zeina Wafa, Conan Cheung, Stephen Tu, Anurag Komanduri, Jon Overman et Doug Goodwin. « Using Smart Farecard Data to Support Transit Network Restructuring : Findings from Los Angeles ». Transportation Research Record : Journal of the Transportation Research Board 2673, n^o 6 (12 mai 2019) : 202–13. http://dx.doi.org/10.1177/0361198119845661.

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Recent technological innovations have changed why, when, where, and how people travel. This, along with other changes in the economy, has resulted in declining transit ridership in many U.S. metropolitan regions, including Los Angeles. It is important that transit agencies become data savvy to better align their services with customer demand in an effort to redesign a bus network that is more relevant and reflective of customer needs. This paper outlines a new data intelligence program within the Los Angeles County Metropolitan Transportation Authority (LA Metro) that will allow for data-driven decision-making in a nimble and flexible fashion. One resource available to LA Metro is their smart farecard data. The analysis of 4 months of data revealed that the top 5% of riders accounted for over 60% of daily trips. By building heuristics to identify transfers, and by tracking riders through space and time to systematically identify home and work locations, transit trip tables by time of day and purpose were extracted. The transit trip tables were juxtaposed against trip tables generated using disaggregate anonymized cell phone data to measure transit market shares and to evaluate transit competitiveness across several measures such as trip length, travel times relative to auto, trip purpose, and time of day. Relying on observed trips as opposed to simulated model results, this paper outlines the potential of using Big Data in transit planning. This research can be replicated by agencies across the U.S. as they reverse declining ridership while competing with data-savvy technology-driven competitors.

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