A high flux source of cold strontium atoms

We describe an experimental apparatus capable of achieving a high loading rate of strontium atoms in a magneto-optical trap operating in a high vacuum environment. A key innovation of this setup is a two dimensional magneto-optical trap deflector located after a Zeeman slower. We find a loading rate of 6x10^9/s whereas the lifetime of the magnetically trapped atoms in the 3P2 state is 54s.Comment: 12 pages, 16 figure

Datalog-Based program analysis with BES and RWL

This paper describes two techniques for Datalog query evaluation and their application to object-oriented program analysis. The first technique transforms Datalog programs into an implicit Boolean Equation System (Bes) that can then be solved by using linear-time complexity algorithms that are available in existing, general purpose verification toolboxes such as Cadp. In order to improve scalability and to enable analyses involving advanced meta-programming features, we develop a second methodology that transforms Datalog programs into rewriting logic (Rwl) theories. This method takes advantage of the preeminent features and facilities that are available within the high-performance system Maude, which provides a very efficient implementation of Rwl. We provide evidence of the practicality of both approaches by reporting on some experiments with a number of real-world Datalog-based analyses. © 2011 Springer-Verlag.This work has been partially supported by the eu(feder), the Spanish mec/micinn under grants tin2007-68093-C02 and tin2010-21062-C02-02, and the Generalitat Valenciana under grant Emergentes gv/2009/024. M.A.Feliu was partially supported by the Spanish mec fpu grant AP2008-00608.Alpuente Frasnedo, M.; Feliú Gabaldón, MA.; Joubert, C.; Villanueva García, A. (2011). Datalog-Based program analysis with BES and RWL. En Datalog Reloaded. Springer Verlag (Germany). 6702:1-20. https://doi.org/10.1007/978-3-642-24206-9_1S1206702Afrati, F.N., Ullman, J.D.: Optimizing joins in a map-reduce environment. In: Manolescu, I., Spaccapietra, S., Teubner, J., Kitsuregawa, M., Léger, A., Naumann, F., Ailamaki, A., Özcan, F. (eds.) EDBT. ACM International Conference Proceeding Series, vol. 426, pp. 99–110. 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LNCS, vol. 5235, pp. 78–133. Springer, Heidelberg (2008)Feliú, M., Joubert, C., Tarín, F.: Efficient BES-based Bottom-Up Evaluation of Datalog Programs. In: Gulías, V., Silva, J., Villanueva, A. (eds.) Proc. X Jornadas sobre Programación y Lenguajes (PROLE 2010), Garceta, pp. 165–176 (2010)Feliú, M., Joubert, C., Tarín, F.: Evaluation strategies for datalog-based points-to analysis. In: Bendisposto, J., Leuschel, M., Roggenbach, M. (eds.) Proc. 10th Workshop on Automated Verification of Critical Systems (AVoCS 2010), pp. 88–103. Technical Report of Düsseldorf University (2010)Garavel, H., Mateescu, R., Lang, F., Serwe, W.: CADP 2006: A Toolbox for the Construction and Analysis of Distributed Processes. In: Damm, W., Hermanns, H. (eds.) CAV 2007. LNCS, vol. 4590, pp. 158–163. Springer, Heidelberg (2007)Hajiyev, E., Verbaere, M., de Moor, O.: CodeQuest: Scalable Source Code Queries with Datalog. In: Hu, Q. (ed.) ECOOP 2006. LNCS, vol. 4067, pp. 2–27. 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Workshop on Interpreters, Virtual Machines and Emulators, IVME 2003, pp. 58–66. ACM Press, New York (2003)Whaley, J., Avots, D., Carbin, M., Lam, M.S.: Using Datalog with Binary Decision Diagrams for Program Analysis. In: Yi, K. (ed.) APLAS 2005. LNCS, vol. 3780, pp. 97–118. Springer, Heidelberg (2005)Zheng, X., Rugina, R.: Demand-driven alias analysis for C. In: Proc. 35th ACM SIGPLAN-SIGACT Symp. on Principles of Programming Languages, POPL 2008, pp. 197–208. ACM Press, New York (2008

Comparative analysis of quality of medical assistance coordination procedures and general practitioners in rural areas medical site

In order to develop recommendations for improving the quality and effectiveness of medical care provided by General practitioners and district therapists, the quality of medical care was studied based on expert assessments of 675 outpatient patients with therapeutic diseases. A survey of 817 patients served by district doctors was conducted. The study was conducted in 2015-2017 on the basis of 5 rural medical sites in 4 districts of the Republic of Dagestan. The results of the study; only a third part (29.7%) of patients were examined in the first 3 days from the date of treatment, the rest (70.3%) - in terms of more than 3 days; incomplete examination took place on average in 35.4% of cases; treatment of patients was defective in General practitioners in 20.5% of cases, in district therapists - in 25.6% of cases. The majority of the population has a positive attitude to the service of General medical practice and believes that their activities are more effective compared to district therapists. Based on the materials of the study, recommendations have been developed to improve the quality and effectiveness of medical care provided by district therapists and General practitioners.В целях разработки рекомендаций по повышению качества и эффективности медицинской помощи, оказываемой врачами общей практики и участковыми терапевтами, изучено качество медицинской помощи по материалам экспертных оценок 675 карт амбулаторных больных с терапевтическими заболеваниями. Проведен опрос 817 пациентов, обслуживаемых участковыми врачами. Исследование проводилось в 2015-2017гг. на базе 5 сельских врачебных участков 4 районов Республики Дагестан. Результаты исследования: лишь третья часть (29,7%) больных обследовалась в первые 3 дня с момента обращения, остальные (70,3%) - в сроки свыше 3 дней; неполное обследование имело место в среднем в 35,4% случаев; лечение больных было неполноценным у врачей общей практики в 20,5% случаев, у участковых терапевтов - в 25,6% случаев. Большинство населения положительно относится к службе общей врачебной практики и считает, что их деятельность более эффективна по сравнению с участковыми терапевтами. На основе материалов исследования разработаны рекомендации по повышению качества и эффективности медицинской помощи, оказываемой участковыми терапевтами и врачами общей практики

Single-Frame Attitude Determination Methods for Nanosatellites

Single-frame methods of determining the attitude of a nanosatellite are compared in this study. The methods selected for comparison are: Single Value Decomposition (SVD), q method, Quaternion ESTimator (QUEST), Fast Optimal Attitude Matrix (FOAM) − all solving optimally the Wahba’s problem, and the algebraic method using only two vector measurements. For proper comparison, two sensors are chosen for the vector observations on-board: magnetometer and Sun sensors. Covariance results obtained as a result of using those methods have a critical importance for a non-traditional attitude estimation approach; therefore, the variance calculations are also presented. The examined methods are compared with respect to their root mean square (RMS) error and variance results. Also, some recommendations are given