Salah satu teknik rekomendasi yang telah sukses dan banyak digunakan yaitu collaborative filtering. Collaborative filtering dapat dibagi menjadi dua metode utama user based item based. Pada umumnya kedua tersebut belum memiliki fitur untuk mengakomodasi baru. Oleh karena itu alternatif disebut user-item Metode ini memberikan berdasarkan urutan teratas nilai prediksi rating dihasilkan oleh siste...

Echocardiographic data were analyzed in 555 patients undergoing mitral balloon commissurotomy (MBC). Patients were enrolled in the National Heart, Lung, and Blood Institute Balloon Valvuloplasty Registry from 24 centers. There were 456 women and 99 men with a mean age of 54 years. Before MBC the two-dimensional echocardiographic variables of mitral valve thickness, mobility, calcification, and ...

BACKGROUND As an alternative to electric vacuum aspirations (EVA), there is an increasing interest in using manual vacuum aspiration (MVA). OBJECTIVE To compare the safety, efficacy and acceptability of MVA with those of EVA for first-trimester abortion. SEARCH STRATEGY We searched MEDLINE, EMBASE, Cochrane Library and Chinese Biomedical Database in all language, together with reference lis...

INTRODUCTION Critically injured patients are at risk of developing posttraumatic stress disorder (PTSD). Propofol was recently reported to enhance fear memory consolidation retrospectively. Thus, we investigated here whether administration of propofol within 72 h of a motor vehicle accident (MVA) affects the subsequent development of PTSD symptoms. METHODS We examined data obtained from a pro...

In this paper a class of closed queueing network is modelled in the Markovian process algebra PEPA and solved using the classical Mean Value Analysis (MVA). This approach is attractive as it negates the need to derive the entire state space, and so certain metrics from large models can be obtained with little computational effort. The approach is illustrated with two numerical examples. About t...

We introduce the Class-oriented Method of Moments (CoMoM), a new exact algorithm to compute performance indexes in closed multiclass queueing networks. Closed models are important for performance evaluation of multi-tier applications, but when the number of service classes is large they become too expensive to solve with exact methods such as Mean Value Analysis (MVA). CoMoM addresses this limi...

BACKGROUND We hypothesized that mitral valve areas (MVAs) with echocardiography, using 3D planimetry technique (measured at one point at maximal opening of mitral valve) versus pressure half-time technique (PHT, measured during entire diastolic phase) in mitral valve repair surgery (MVR) would be different. METHODS Patients who had undergone MVR were retrospectively reviewed, and two differen...

In this paper we consider   multivariate Lagrange mean-value interpolation problem, where interpolation parameters are integrals over spheres. We have   concentric spheres. Indeed, we consider the problem in three variables when it is not correct.  

AIMS We sought to investigate the factors associated with restenosis and its potential association with late clinical deterioration after successful percutaneous mitral valvuloplasty (PMV). METHODS AND RESULTS We analysed echocardiographic (median 74 months) and clinical (median 109 months) follow-up data of 329 patients who achieved procedural success, defined as mitral valve area (MVA) > or...