80 research outputs found
PrePost(+): An efficient N-lists-based algorithm for mining frequent itemsets via Children-Parent Equivalence pruning
No full textN-list is a novel data structure proposed in recent years. It has been proven to be very efficient for mining frequent itemsets. In this paper, we present PrePost(+), a high-performance algorithm for mining frequent itemsets. It employs N-list to represent itemsets and directly discovers frequent itemsets using a set-enumeration search tree. Especially, it employs an efficient pruning strategy named Children-Parent Equivalence pruning to greatly reduce the search space. We have conducted extensive experiments to evaluate PrePost(+) against three state-of-the-art algorithms, which are PrePost, FIN, and FP-growth*, on six various real datasets. The experimental results show that PrePost(+) is always the fastest one on all datasets. Moreover, PrePost(+) also demonstrates good performance in terms of memory consumption since it use only a litter more memory than FP-growth* and less memory than PrePost and FIN. (C) 2015 Elsevier Ltd. All rights reserved.National Natural Science Foundation of China [61170091]SCI(E)[email protected]; [email protected]
The savings collapse during the transition in Eastern Europe
No full textThe authors assess the presence and extent of involuntary savings by comparing the predicted savings rates of market economies with those of the pre-transition economies. On balance, predicted savings rates fell short of actual savings rates, especially for the former Soviet Union and the Baltics -- providing some support for the notion of excessive pre-transition savings. Comparing the savings behavior of market economies and transition economies, they found substantial similarities, except for a negative link between savings and GDP growth. As the fastest-growing transition economies are at the bottom of the adjustment J-curve, the finding is consistent with consumption smoothing. Finally, they explored whether differences in the extent of economic liberalization affected savings rates in the cross-section of transition economies. They found that liberalization is associated with lower savings, with a one-year lag. To the extent that liberalization is perceived as an indicator of likely future growth, this behavior is consistent with smoothing in the face of a J-curve change in output.Insurance Law,Banks&Banking Reform,Economic Theory&Research,Environmental Economics&Policies,Insurance&Risk Mitigation,Environmental Economics&Policies,Banks&Banking Reform,Economic Theory&Research,Insurance&Risk Mitigation,Rural Poverty Reduction
Development of Polarized Photocathodes for the Linear Collider
No full textIn prior years a Wisconsin-SLAC collaboration developed polarized photocathodes which were used for the SLAC SLD and fixed target programs. Currently, the R&D program goal is the development of a polarized electron source (PES) which meets the ILC requirements for polarization, charge, lifetime, and pulse structure. There are two parts to this program. One part is the continued improvement of photocathode structures with higher polarization. The second part is the design and development of the laser system used to drive the photocathode. The long pulse train for the ILC introduces new challenges for the PES. More reliable and stable operation of the PES may be achievable if appropriate R&D is carried out for higher voltage operation and for a simpler photocathode load-lock system. The collaboration with SLAC is through the Polarized Photocathode Research Collaboration (PPRC). Senior SLAC personnel include T. Maruyama, J. Clendenin, R. Kirby, and A. Brachmann
A person-centered care intervention for geriatric certified nursing assistants
No full textClick on the DOI link to access the article (may not be free).Purpose: To pilot test a multicomponent intervention to increase certified nursing assistants' (CNAs) awareness of person-centered care. To establish the feasibility of implementing an intervention involving videotaped biographies of residents and videotapes of resident/CNA caregiving interactions. Design and Methods: A training program was provided at two nursing homes (NHs) using a wait-list control design. Levels of dyadic relationship closeness and satisfaction were compared prepost. Video recordings of CNA/resident interactions were coded for person-centered care using two observational instruments. Results: Based on data from 19 resident/aide dyads, the findings were that resident's perceptions of relationship closeness increased significantly posttraining at both NHs, NH1, z = -1.89, p < .05, and the NH2, z = -1.95, p < .05. Effects were also seen with the CNA's perceptions of satisfaction and closeness, and resident satisfaction. Implications: The findings suggest that this type of intervention is feasible and warrants further research.Peer reviewedCopyright 2012 Author
Efektivitas Buerger Allen exercise dibandingkan dengan Rendam Kaki Air Hangat terhadap Nilai Ankle Brachial Index dan Gula Darah pada Pasien Diabetes Mellitus
No full textPeripheral Arterial Disease (PAD) merupakan penyempitan pembuluh darah arteri perifer yang disebabkan karena aterosklerosis akibat komplikasi dari Diabetes Mellitus (DM). Akibatnya terjadi penurunan aliran darah ke ekstremitas yang bila tidak ditangani akan menyebabkan klaudisio intermiten, luka gangrene hingga berisiko amputasi. Penelitian ini bertujuan untuk mengetahui Efektivitas Buerger Allen exercise (BAE) dibandingkan dengan Rendam Kaki Air Hangat Terhadap Nilai Ankle Brachial Index (ABI) dan Gula Darah Sewaktu(GDS) pada pasien DM tipe 2. Jenis penelitian ini adalah Quassy Eksperimen prepost test and between two groups. Total sampel 54 penderita diabetes melitus di Rumah Sakit Sumber Waras yang diperoleh secara random dengan blok permutasi. Sampel dibagi menjadi 2 kelompok perlakuan yaitu BAEdan Rendam kaki air hangat. Perlakuan diberikan selama 5 hari berturut-turut dengan pelaksanaan 2 kali sehari yaitu pagi dan sore selama 15-20 menit. Alat yang digunakan untuk mengukur nilai ABIadalah Vascular Dopler. Berdasarkan uji paired T test di temukan ada perbedaan yang bermakna nilai ABI sebelum dan sesudah intervensi pada kelompok BAE (p=0.00), dan pada kelompok Rendam kaki air hangat (p=0.00); namun tidak ada perbedaan bermakna pada nilai GDS sebelum dan sesudah intervensi pada kedua kelompok perlakuan (p>0.05).Uji statistic Ancova di temukan ada pengaruh BAE terhadap nilai ABI dan Gula Darah Sewaktu yang dikontrol oleh variabel confounding dengan Corrected Model 0,000; namun tidak ada pengaruh rendaman kaki air hangat terhadap nilai ABIdan GDS yang dikontrol oleh variabel confounding dengan Corrected Model 0,065. BAE merupakan intervensi yang efektif dalam meningkatkan nilai ABI dibandingkan rendam kaki air hangat, namun Rendam kaki air hangat  lebih efektif dalam menurunkan nilai GDS
Fast mining frequent itemsets using Nodesets
No full textNode-list and N-list, two novel data structure proposed in recent years, have been proven to be very efficient for mining frequent itemsets. The main problem of these structures is that they both need to encode each node of a PPC-tree with pre-order and post-order code. This causes that they are memory-consuming and inconvenient to mine frequent itemsets. In this paper, we propose Nodeset, a more efficient data structure, for mining frequent itemsets. Nodesets require only the pre-order (or post-order code) of each node, which makes it saves half of memory compared with N-lists and Node-lists. Based on Nodesets, we present an efficient algorithm called FIN to mining frequent itemsets. For evaluating the performance of FIN, we have conduct experiments to compare it with PrePost and FP-growth*, two state-of-the-art algorithms, on a variety of real and synthetic datasets. The experimental results show that FIN is high performance on both running time and memory usage. (C) 2014 Elsevier Ltd. All rights reserved.Computer Science, Artificial IntelligenceEngineering, Electrical & ElectronicOperations Research & Management ScienceSCI(E)[email protected]
A pre-post study of a multi-country scale up of resuscitation training of facility birth attendants: does Helping Babies Breathe training save lives?
No full textBackground: Whether facility-based implementation of Helping Babies Breathe (HBB) reduces neonatal mortality at a population level in low and middle income countries (LMIC) has not been studied. Therefore, we evaluated HBB implementation in this context where our study team has ongoing prospective outcome data on all pregnancies regardless of place of delivery.
Methods: We compared outcomes of birth cohorts in three sites in India and Kenya pre-post implementation of a facility-based intervention, using a prospective, population-based registry in 52 geographic clusters. Our hypothesis was that HBB implementation would result in a 20 % decrease in the perinatal mortality rate (PMR) among births ≥1500 g.
Results: We enrolled 70,704 births during two 12-month study periods. Births within each site did not differ prepost intervention, except for an increased proportion ofbirths; however, a post-hoc analysis stratified by birthweight documented improvement insurvival.
Conclusions: Rapid scale up of HBB training of facility birth attendants in three diverse sites in India and Kenya was not associated with consistent improvements in mortality among all neonates ≥1500 g; however, differential improvements inpopulation, data collection, and ongoing quality monitoring activities.
Trial registration: The study was registered at ClinicalTrials.gov: NCT0168101
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