For a subspace S of Cn and fixed basis, we study the compact convex set mS=convexhull {|s|2∈R≥0n:s∈S ‖s‖=1}≃{Diag(Y)∈Mnh(C):Y≥0,tr(Y)=1,PSYPS=Y}that call moment S, where |s|2=(|s1|2,|s2|2,…,|sn|2). This is relevant in determination minimal hermitian matrices (M∈Mnh such that ‖M+D‖≤D for every diagonal D spectral norm ‖⋅‖). We describe extremal points certain curves mS terms principal vectors mi...

OBJECTIVE To evaluate the validity of the Beighton score as a generalized measure of hypermobility and to measure the prevalence of hypermobility and pain in a random population of school age children. STUDY DESIGN Prospective study of 551 children attending various Dutch elementary schools participated; 47% were males (258) and 53% (293) females, age range was 6 to 12 years. Children's joint...

In this paper, we introduce the notions of C-numerical range and C-spectrum of matrix polynomials. Some algebraic and geometrical properties are investigated. We also study the relationship between the C-numerical range of a matrix polynomial and the joint C-numerical range of its coefficients.

BACKGROUND Most previous studies on hallux valgus focused on the possible relationship between this deformity and muscles and/or ligaments in the foot and lower leg. Very little is known about the relationship between hallux valgus and alignment of the proximal joints. The aims of the present study were to determine the extent to which lower extremity alignment characteristics of the hip, knee,...

  Simultaneous mid third clavicle fracture and acromioclavicular joint dislocation is a rare combination injury, as a result of high-energy trauma. We report a patient with a middle third clavicle fracture and ipsilateral grade three-acromioclavicular joint dislocation, which is a rare combination. The patient wanted to get back to work as soon as possible, so the fracture was fixed with recons...

Modeling longitudinal binary data is challenging but common in practice. Existing methods on modeling of responses take no account the fact that correlation coefficient must have an upper bound which smaller than one. Ignoring this can lead to incorrect statistical inferences for data. A novel method proposed model mean and within-subject coefficients data, simultaneously, by taking into constr...