950 resultados para Search Strategies


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Outside lobbying is a key strategy for social movements, interest groups and political parties for mobilising public opinion through the media in order to pressure policymakers and influence the policymaking process. Relying on semi-structured interviews and newspaper content analysis in six Western European countries, this article examines the use of four outside lobbying strategies – media-related activities, informing (about) the public, mobilisation and protest – and the amount of media coverage they attract. While some strategies are systematically less pursued than others, we find variation in their relative share across institutional contexts and actor types. Given that most of these differences are not accurately mirrored in the media, we conclude that media coverage is only loosely connected to outside lobbying behaviour, and that the media respond differently to a given strategy when used by different actors. Thus, the ability of different outside lobbying strategies to generate media coverage critically depends on who makes use of them.

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Results of a search for supersymmetry via direct production of third-generation squarks are reported, using 20.3  fb −1 of proton-proton collision data at √s =8  TeV recorded by the ATLAS experiment at the LHC in 2012. Two different analysis strategies based on monojetlike and c -tagged event selections are carried out to optimize the sensitivity for direct top squark-pair production in the decay channel to a charm quark and the lightest neutralino (t 1 →c+χ ˜ 0 1 ) across the top squark–neutralino mass parameter space. No excess above the Standard Model background expectation is observed. The results are interpreted in the context of direct pair production of top squarks and presented in terms of exclusion limits in the m ˜t 1, m ˜ X0 1 ) parameter space. A top squark of mass up to about 240 GeV is excluded at 95% confidence level for arbitrary neutralino masses, within the kinematic boundaries. Top squark masses up to 270 GeV are excluded for a neutralino mass of 200 GeV. In a scenario where the top squark and the lightest neutralino are nearly degenerate in mass, top squark masses up to 260 GeV are excluded. The results from the monojetlike analysis are also interpreted in terms of compressed scenarios for top squark-pair production in the decay channel t ˜ 1 →b+ff ′ +χ ˜ 0 1 and sbottom pair production with b ˜ 1 →b+χ ˜ 0 1 , leading to a similar exclusion for nearly mass-degenerate third-generation squarks and the lightest neutralino. The results in this paper significantly extend previous results at colliders.

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The Astronomical Institute of the University of Bern (AIUB) is conducting several search campaigns for space debris using optical sensors. The debris objects are discovered during systematic survey observations. In general, the result of a discovery consists in only a short observation arc, or tracklet, which is used to perform a first orbit determination in order to be able to observe t he object again in subsequent follow-up observations. The additional observations are used in the orbit improvement process to obtain accurate orbits to be included in a catalogue. In order to obtain the most accurate orbit within the time available it is necessary to optimize the follow-up observations strategy. In this paper an in‐depth study, using simulations and covariance analysis, is performed to identify the optimal sequence of follow-up observations to obtain the most accurate orbit propagation to be used for the space debris catalogue maintenance. The main factors that determine the accuracy of the results of an orbit determination/improvement process are: tracklet length, number of observations, type of orbit, astrometric error of the measurements, time interval between tracklets, and the relative position of the object along its orbit with respect to the observing station. The main aim of the covariance analysis is to optimize the follow-up strategy as a function of the object-observer geometry, the interval between follow-up observations and the shape of the orbit. This an alysis can be applied to every orbital regime but particular attention was dedicated to geostationary, Molniya, and geostationary transfer orbits. Finally the case with more than two follow-up observations and the influence of a second observing station are also analyzed.

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Background. Children in the age group of 2-5 years spend substantial amount of time during the day in some kind of childcare setting. These settings are an excellent environmental infrastructure to enhance their nutrition and physical activity behavior and to promote healthy eating and physical activity habits. Due to the steep rise in overweight and obesity among children in the past three decades, it becomes essential to intervene early. There exists a need for literature on a comprehensive and sustainable approach to obesity prevention for younger children in these settings. ^ Methods. Systematic literature search was undertaken using databases like Medline Ovid, Pubmed, Medline Ebsco, and Cochrane Library. Articles published in English as well as English language abstracts of foreign articles were included. The inclusion criteria were as follows: (1) Studies conducted in any part of the world exploring relevant themes and a child care or preschool setting would be included. (2) The interventions promoted physical activity, nutrition/healthy eating/improved diet, reduced television viewing, reduced BMI, changed knowledge and behavior of children and or staff or affected policy/standards/regulations. (3) The population was children in the age group of at least 2 years to 5 years. (4) Articles published in English and English language abstracts for foreign articles would be included. ^ Results. 16 articles were included in the review that consisted of primary interventions in the form of randomized control trials or pre-post interventions were conducted in a preschool or child care or day care setting only. The outcomes pertaining to healthy weight in children were increased vegetable intake, reduced BMI and increased knowledge among others. ^ Conclusion. There is a dearth of data on strong intervention trials in the child care setting. Preschool research studies in the young children that have been conducted are not strong enough. There is a need for more randomized control trials and a well planned evaluation in the preschool age children. There is a need to develop outcome measures that can accurately assess the changes in diet and physical activity in this age group. Child care nutrition and physical activity standards need to be made stringent. ^

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Mass spectrometry (MS) data provide a promising strategy for biomarker discovery. For this purpose, the detection of relevant peakbins in MS data is currently under intense research. Data from mass spectrometry are challenging to analyze because of their high dimensionality and the generally low number of samples available. To tackle this problem, the scientific community is becoming increasingly interested in applying feature subset selection techniques based on specialized machine learning algorithms. In this paper, we present a performance comparison of some metaheuristics: best first (BF), genetic algorithm (GA), scatter search (SS) and variable neighborhood search (VNS). Up to now, all the algorithms, except for GA, have been first applied to detect relevant peakbins in MS data. All these metaheuristic searches are embedded in two different filter and wrapper schemes coupled with Naive Bayes and SVM classifiers.

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The present paper describes the preliminary stages of the development of a new, comprehensive model conceived to simulate the evacuation of transport airplanes in certification studies. Two previous steps were devoted to implementing an efficient procedure to define the whole geometry of the cabin, and setting up an algorithm for assigning seats to available exits. Now, to clarify the role of the cabin arrangement in the evacuation process, the paper addresses the influence of several restrictions on the seat-to-exit assignment algorithm, maintaining a purely geometrical approach for consistency. Four situations are considered: first, an assignment method without limitations to search the minimum for the total distance run by all passengers along their escaping paths; second, a protocol that restricts the number of evacuees through each exit according to updated FAR 25 capacity; third, a procedure which tends to the best proportional sharing among exits but obliges to each passenger to egress through the nearest fore or rear exits; and fourth, a scenario which includes both restrictions. The four assignment strategies are applied to turboprops, and narrow body and wide body jets. Seat to exit distance and number of evacuees per exit are the main output variables. The results show the influence of airplane size and the impact of non-symmetries and inappropriate matching between size and longitudinal location of exits.

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The distinctive relations between biological activity and isotopic effect recorded in biomarkers (e.g., carbon and sulfur isotope ratios) have allowed scientists to suggest that life originated on this planet nearly 3.8 billion years ago. The existence of life on other planets may be similarly identified by geochemical biomarkers, including the oxygen isotope ratio of phosphate (δ18Op) presented here. At low near-surface temperatures, the exchange of oxygen isotopes between phosphate and water requires enzymatic catalysis. Because enzymes are indicative of cellular activity, the demonstration of enzyme-catalyzed PO4–H2O exchange is indicative of the presence of life. Results of laboratory experiments are presented that clearly show that δ18OP values of inorganic phosphate can be used to detect enzymatic activity and microbial metabolism of phosphate. Applications of δ18Op as a biomarker are presented for two Earth environments relevant to the search for extraterrestrial life: a shallow groundwater reservoir and a marine hydrothermal vent system. With the development of in situ analytical techniques and future planned sample return strategies, δ18Op may provide an important biosignature of the presence of life in extraterrestrial systems such as that on Mars.

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New technologies have transformed teaching processes and enabled new ways of study and learning. In these activities, it is suspected that the students don't make good use of new available technologies or, in the best case, they are underused. The analysis of this issue with the design of strategies to correct any defects found is the motivation that supports the development of this work and the main purpose of it. Evaluate information search habits used by the student and analyse their deduct synthesis and processing capabilities of the results found. The researchers of this study are university teachers of first year subjects, which allows them to know the information search performances by students.

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Many scholars have analyzed the role of the European Union (EU) in its southern neighborhood by looking at the EU’s policy documents and strategies. As such, it is often argued that the EU is at best a useful partner in democratic reform and at worst an unsuccessful ‘normative power’. However, very few studies have analyzed the EU’s role from the recipients’ point of view: the southern neighboring countries themselves. This paper adopts an ‘outside-in approach’ and explores what the southern neighborhood countries believe the EU should be or do. On the basis of a set of 15 interviews with diplomats from the region and an analysis of 50 newspaper articles from the region on the EU’s relations with its southern neighborhood, this paper seeks to reveal the EU’s real ’added value’ for its southern Mediterranean partners. To what extent does the EU’s own perceived role in its southern neighborhood match the role conception of those countries? Based on the three case studies of Algeria, Jordan and Egypt, the paper finds that there is a clear divergence in role conceptions between the EU and its southern partners. While the EU sees itself as a ‘force for good’ and promoter of norms and democracy in the southern Mediterranean region, the three countries primarily believe that the EU perceives itself foremost as a provider of security and stability in the region, while they primarily expect it to act as a reliable partner for economic cooperation.

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DNA Microarray is a powerful tool to measure the level of a mixed population of nucleic acids at one time, which has great impact in many aspects of life sciences research. In order to distinguish nucleic acids with very similar composition by hybridization, it is necessary to design microarray probes with high specificities and sensitivities. Highly specific probes correspond to probes having unique DNA sequences; whereas highly sensitive probes correspond to those with melting temperature within a desired range and having no secondary structure. The selection of these probes from a set of functional DNA sequences (exons) constitutes a computationally expensive discrete non-linear search problem. We delegate the search task to a simple yet effective Evolution Strategy algorithm. The computational efficiency is also greatly improved by making use of an available bioinformatics tool.

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A specialised reconfigurable architecture for telecommunication base-band processing is augmented with testing resources. The routing network is linked via virtual wire hardware modules to reduce the area occupied by connecting buses. The number of switches within the routing matrices is also minimised, which increases throughput without sacrificing flexibility. The testing algorithm was developed to systematically search for faults in the processing modules and the flexible high-speed routing network within the architecture. The testing algorithm starts by scanning the externally addressable memory space and testing the master controller. The controller then tests every switch in the route-through switch matrix by making loops from the shared memory to each of the switches. The local switch matrix is also tested in the same way. Next the local memory is scanned. Finally, pre-defined test vectors are loaded into local memory to check the processing modules. This algorithm scans all possible paths within the interconnection network exhaustively and reports all faults. Strategies can be inserted to bypass minor faults

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DNA microarray is a powerful tool to measure the level of a mixed population of nucleic acids at one time, which has great impact in many aspects of life sciences research. In order to distinguish nucleic acids with very similar composition by hybridization, it is necessary to design probes with high specificities, i.e. uniqueness, and also sensitivities, i.e., suitable melting temperature and no secondary structure. We make use of available biology tools to gain necessary sequence information of human chromosome 12, and combined with evolutionary strategy (ES) to find unique subsequences representing all predicted exons. The results are presented and discussed.

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A systematic review was conducted to explicitly identify interventions that alone, or in combination, were effective in improving antibiotic prescribing. The citation search strategy used in the present review provided a database of 365077 studies, of which only twenty-five were included in the final review (“review studies”). Analysis of the interventions used within the review studies indicated that a combination of “guidelines” and “pharmacy” interventions have the greatest potential to improve antibiotic prescribing. Two types of qualitative research were conducted, semi-structured interviews and the collection of naturally occurring data. Semi-structured interviews were conducted in order to determine NHS managers? perceptions of current policies used to improve antibiotic prescribing within selected Primary Care Trusts and highlighted the importance of pharmacy intervention, formularies or guidelines and improved prescribing analysis (IT based intervention) on improving antibiotic prescribing. This was supported by the collection of naturally occurring data, which was used to provide further insight into interventions used to improve antibiotic prescribing. The Specialist Antibiotic Pharmacist (HD) produced and implemented an innovative electronic antibiotic prescribing analysis tool (the Antibiotic Database) to analyse and improve antibiotic prescribing in a consistent manner. The key advantage of the Antibiotic Database was the time and money saved on producing visual electronic outputs containing an inaccurate outcome measure or time period for analysis. The results concluded that an IT based intervention, such as the Antibiotic Database should be used, in addition to the use of antibiotic guidelines and pharmacy intervention, within all sectors of the NHS in order to improve antibiotic prescribing and its analysis.

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A szerzők kutatásának célja, hogy az innovációmenedzsment és az innovációs stratégiák összefüggéseiben rávilágítsanak a magyarországi vállalatokat jellemző stratégiai irányokra és azonosítsák a vállalati tudás szerepét az innovációs folyamatokban. Az induktív logikán alapuló, kvalitatív interjúkra építkező módszertan segítségével történt az adatok gyűjtése és elemzése. Kutatási eredményeik alapján megállapítható, hogy a magyar vállalatok többsége tisztában van az innováció stratégiai jelentőségével és a tudás innovációfokozó erejével. Azonban a bizonytalan szabályozási környezet, a negatív piaci hangulat, a finanszírozási forrásokhoz való hozzáférés és a globális verseny megnehezítik a hazai KKV-k innovációs törekvéseit. Ugyanakkor a multinacionális vállalatok élen járnak mind a technológiai, mind pedig a nem technológiai innovációk terén is. A nem technológiai innováció területén komoly fejlődési lehetőségek körvonalazódhatnak a magyar KKV-k számára is, hiszen ezek kevésbé költségesek és időigényesek, és a belső erőforrásokat felhasználva a szervezeti tudásbázisra is épülhetnek. ____ The aim of the authors’ research is to highlight the characteristic strategic directions of Hungarian companies and identify the role of corporate knowledge in the innovative processes in the context of innovation management and innovative strategies. The collection and analysis of data were helped by a methodology which is based on inductive logic and qualitative interviews. The diagnosis, based on there search results,was that the majority of Hungarian companies are aware of the strategic importance of innovation and the innovation enhancing power of knowledge.