It is shown that the group of automorphisms of a nonatomic finite measure space is contractible. 1. In [l] S. Harada showed that the automorphism group of the unit interval with Lebesgue measure is simple and arcwise connected. Our purpose here is to give a simple proof that the automorphism group G of a nonatomic measure space (ß, (B, m) with rez(ß)< oo is contractible. The contraction map wil...

Incorporation of a resolution model during statistical image reconstruction often produces images of improved resolution and signal-to-noise ratio. A novel and practical methodology to rapidly and accurately determine the overall emission and detection blurring component of the system matrix using a printed point source array within a custom-made Perspex phantom is presented. The array was scan...

Quantum dynamics of integrable systems is discussed. Localized wave packets generalizing the conventional coherent states of minimal uncertainty are constructed. The wave packet moves along a certain trajectory and does not change its shape for times of order 1 h̄ . In this Letter we suggest that the definition of a coherent state should be related to the Hamiltonian.The conventional coherent st...

PURPOSE In childhood acute lymphoblastic leukemia (ALL), approximately 25% of patients suffer from relapse. In recurrent disease, despite intensified therapy, overall cure rates of 40% remain unsatisfactory and survival rates are particularly poor in certain subgroups. The probability of long-term survival after relapse is predicted from well-established prognostic factors (i.e., time and site ...

INTRODUCTION The majority of hyperglycaemic incidents in oncohaematological patients treated with glucocorticosteroids remain undiagnosed. The aim of our study was to work out a detailed protocol for the control of carbohydrate metabolism and to evaluate whether such a protocol can help in diagnosis of carbohydrate metabolism disturbances in oncohaematological paediatric patients. MATERIAL AN...

Figure 2. Angular distributions of inelastic scattering around the undiffracted beam and around a beam diffracted through an angle a. The shaded area represents the contribution from the diffracted beam to the intensity collected by an on-axis aperture of semi-angle A3. [6] Egerton, R. F., Electron Energy Loss Spectroscopy in the Electron Microscope, Plenum Press, New York (1986). [7] Steele, J...

Although the Philadelphia chromosome (Ph1) has been identified as an adverse prognostic factor in acute lymphoblastic leukemia (ALL), little is known about the incidence and clinical course of relapsed Ph1-positive ALL in children. The incidence was determined by screening of 170 consecutive children with first bone marrow relapse of ALL using the reverse transcriptase-polymerase chain reaction...

We present four spectra of the Type Ia supernova (SN Ia) 2006D extending from −7 to +13 days with respect to B-band maximum. The spectra include the strongest signature of unburned material at photospheric velocities observed in a SN Ia to date. The earliest spectrum exhibits C II absorption features below 14,000 km s, including a distinctive C II λ6580 absorption feature. The carbon signatures...

We present four spectra of the Type Ia supernova (SN Ia) 2006D extending from −7 to +13 days with respect to B-band maximum. The spectra include the strongest signature of unburned material at photospheric velocities observed in a SN Ia to date. The earliest spectrum exhibits C II absorption features below 14,000 km s, including a distinctive C II λ6580 absorption feature. The carbon signatures...

Allogeneic stem cell transplantation (SCT) is frequently considered as treatment for relapsed childhood acute lymphoblastic leukemia (ALL). For patients without a matched sibling donor, SCT from unrelated donors (UD-SCT) has been increasingly performed during the past years. However, UD-SCT–related mortality and morbidity is still considerable, and the question remains as to which patients are ...