Enfisema pulmonar

Dos son las causas que nos impulsaron a ocuparnos del presente temas. La primera, el relativamente gran número de casos observados en el curso de nuestra actividad hospitalaria, bien es cierto, conviene aclarar, que hemos desarrollado nuestra práctica a través de varios años en servicios de pulmón; la segunda en orden pero no en importancia, el convencimiento pleno de que el relativo interés que muchos médicos y profanos adjudican a procesos considerados corrientemente banales, incide gravosamente sobre el número de enfisematosos sustanciales y aunque afortunadamente este hecho tiende a corregirse, creemos que conviene sumar voces al coro de aquellos que en lo posible hacen antes medicina preventiva que curativa o paliativa.El hecho de que en diversos aspectos nos explayemos algo en lo referente al enfisema gigante obedece simplemente al número ño por cierto común a que alcanzan las observaciones que componen nuestra casuística.Tesis digitalizada en SEDICI gracias a la Biblioteca de la Facultad de Ciencias Médicas (UNLP).Facultad de Ciencias Médica

Identifying Exemplary School Counseling Practices in Nationally Recognized High Schools

The National Center for School Counseling Outcome Research (CSCOR) at the University of Massachusetts-Amherst studied exemplary practices of 18 high schools that received recognition for college preparation and placement in 2004 and 2005. Through interviews with key personnel at each of the high schools, the researchers generated a set of ten domains that characterize the work of the school counselor that seem to be related to improved student enrollment in post-secondary institutions

Scaling Properties of the Mean Multiplicity and Pseudorapidity Density in e+e-, e+p, p+p, p+A and A+A(B) Collisions

The charged-particle pseudorapidity density (dN(ch)/d eta) for p((p) over bar)+p, p+A and A+A(B) collisions and the mean multiplicity for e(-)+e(+), e(+/-)+p, and p((p) over bar)+p collisions are studied for a wide range of beam energies (root s). Characteristic scaling patterns are observed for both dN(ch)/d eta and , consistent with a thermal particle production mechanism for the bulk of the soft particles created in all of these systems. The scaling patterns found also validate an essential role for quark participants in these collisions. The measured values for dN(ch)/d eta and are observed to factorize into contributions that depend on log (root s) and the number of nucleon or quark participant pairs N-pp. The quantification of these contributions gives expressions that serve to systematize dN(ch)/d eta and measurements spanning nearly 4 orders of magnitude in root s and to predict their values as a function of root s and N-pp

Elliptic flow of electrons from heavy-flavor hadron decays in Au+Au collisions at sNN=\sqrt{s_{\rm NN}} = 200, 62.4, and 39 GeV

We present measurements of elliptic flow ($v_2$) of electrons from the decays of heavy-flavor hadrons ($e_{HF}$) by the STAR experiment. For Au+Au collisions at $\sqrt{s_{\rm NN}} =$ 200 GeV we report $v_2$, for transverse momentum ($p_T$) between 0.2 and 7 GeV/c using three methods: the event plane method ($v_{2}${EP}), two-particle correlations ($v_2${2}), and four-particle correlations ($v_2${4}). For Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 62.4 and 39 GeV we report $v_2${2} for $p_T< 2$ GeV/c. $v_2${2} and $v_2${4} are non-zero at low and intermediate $p_T$ at 200 GeV, and $v_2${2} is consistent with zero at low $p_T$ at other energies. The $v_2${2} at the two lower beam energies is systematically lower than at $\sqrt{s_{\rm NN}} =$ 200 GeV for $p_T < 1$ GeV/c. This difference may suggest that charm quarks interact less strongly with the surrounding nuclear matter at those two lower energies compared to $\sqrt{s_{\rm NN}} = 200$ GeV.Comment: Version accepted by PR