[en] SYRIO is a code for the inversion of a non-singular square matrix whose order is not higher than 40 for the UNIVAC-UCT (SS-90). The treatment stands from the inversion formula of sherman and Morrison, and following the Herbert S. Wilf's method for special matrices, generalize the procedure to any kind of non-singular square matrices. the limitation of the matrix order is not inherent of the program itself but imposed by the storage capacity of the computer for which it was coded. (Author)

[en] The Tecnatom Hydraulic Loop is a dynamic training platform. It has been designed with the purpose of improving the work in teams. With this system, the student can obtain a full scope vision of a system. The hydraulic Loop is a part of the Tecnatom Maintenance Centre. The first objective of the hydraulic Loop is the instruction in components, process and process control using open control system. All the personal of an electric power plant can be trained in the Hydraulic Loop with specific courses. The development of a dynamic tool for tests previous to plant installations has been an additional objective of the Hydraulic Loop. The use of this platform is complementary to the use of full-scope simulators in order to debug and to analyse advanced control strategies. (Author)

[en] The radiation risks are probably for historical reasons related to their military origin, the paradigm of subjectivity and its perception by the population has become increasingly of interest to those responsible for management and management of any applications of ionizing radiation. This interest is positive because the more you know, the better will the conditions to try to change attitudes and approaches to the problem, particularly from the point of view of communication with society.

[en] An extension of the concept of variational derivative is introduced which allows one to derive an integral identity in the variational formalism. It is applied to characterize the kernel and range of the variational derivative and the divergence operator. (Auth.)

[en] Dosimetry in patients treated with radiopharmaceuticals needs to be carried out for each individual treatment. No standardized procedure is currently available. In our study, the dosimetry for each individual treatment has been calculated using the dose protocol of the Sociedad Espanola de Fisica Medica for the treatment of thyroid cancer with 131I. This protocol is currently under review, since it proposes a procedure which only uses the daily external dose rate measurements during the patient hospital stay and an external dose rate measurement performed 7-9 days after the activity administration. The results obtained seem to be consistent with those found by other authors following different procedures. Moreover, this protocol has proved to be very useful to verify the values of doses established for red marrow are not exceeded. The maximum activity that can be administered in later treatments could also be assessed with this procedure. Additionally, the activity in urine, which cannot be measured directly, was determined. The potential dose which any patient's relative or any person staying close to the patient might receive during the treatment was determined as well. These results make it possible to establish more realistic criteria regarding radiation protection. (Author).

[en] Continuing education programs and information and personal follow through written and verbal notifications implemented in the hospital have allowed to know the causes of non-delivery of the dosimeter, reduce the percentage of administrative dose assignment and achieve a more effective dosimetric control.

[en] The nonlinear evolution equations of Jaulent-Miodek are considered from the point of view of infinite-dimensional Hamiltonian mechanics. They are found to be twofold Hamiltonian systems and as a consequence they admit an infinite series of constants of motion. (author)

[en] The Jaulent-Miodek transformation which relates the families of evolution equations associated with the energy-dependent Schroedinger and Zaharov-Shabat spectral problems is found to be a canonical transformation. (author)

[en] We propose a procedure to estimate the absorbed dose endocrine tumors in patients who are given iodobencilguanidina Meta (MIBG) labeled with I-131.

[en] The Gel'fand-Dikii method is used to derive families of nonlinear Hamiltonian evolution equations from matrix Schroedinger operators. These Hamiltonian systems have an infinite set of constants of motion such that the Poisson brackets of any two of them vanish identically and they admit also a formulation in terms of Lax pairs. (author)