Microkeratome-assisted posterior keratoplasty is a new surgical technique that may be valuable in treating patients with corneal decompensation secondary to endothelial dysfunction. A hinged anterior stromal flap is fashioned in the host cornea using a microkeratome, and the diseased posterior stroma and endothelium are resected. A complementary donor stromal button is prepared using a microkeratome and an artificial anterior chamber. The donor button is transplanted and secured with sutures, and the flap is repositioned. The flap can be lifted later to remove the sutures or to correct residual refractive errors using an excimer laser. This technique may allow the use of infant corneal donor tissue and may improve the outcomes of posterior keratoplasty.

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Abstract. For almost all P-adic completions of an algebraic number field, if s G C is a pole of f = ff\f(x, y) \s \dx\K \ dy \K , where / is a polynomial whose only singular point is the origin,/(0,0) = 0, and/is irreducible in K[ [x, y]], then Re(i) is -1 or one of an explicitly given set of rational numbers, whose cardinality is the number of characteristic exponents of / = 0. 0. Introduction. Let F be an algebraic number field, Kp a F-adic completion of F with ring of integers F, maximal ideal F, group of units Fx , and residue class field R/P of cardinality q. The Haar measure on Kp such that F has measure 1 is called the usual Haar measure, and its product measure is the usual Haar measure on Kp. The absolute value IL on Kn is defined as 101^ = 0 and \d(tx)\Kp=\t\Kp\dx\Kp for every t in Kp -{0}.Let f E K[x, y] have a singularity only at (0,0),/(0,0) = 0, and suppose that/is irreducible in K[ [x, y]], where K is the algebraic closure of K.Our purpose is to investigate the poles of the meromorphic continuation of the complex-valued function fs=SJ)^y^M^My\x, where j is a complex variable.Igusa has given [4, p. 310], in a more general setting, a set of candidates which contains the poles of fs and, in the situation described above, has determined the pole of/1 closest to the origin [3, p. 367].Here we show that for almost all F-adic completions of K, if j is a pole of fs, Re(j) is -1 or one of an explicitly given set of quotients of integers called "numerical data" of desingularization. Only one such quotient is associated with each characteristic exponent of / = 0.Every exceptional curve in the desingularization of / = 0, not only the relatively few we associate below with the characteristic exponents, has a pair of numerical data whose quotient appears, at first glance, to give a negative real pole of fs. We eliminate false candidates by using a relationship between the numerical data, and also an argument involving the Newton polygon. In the process, the behavior of a previously studied function defined on the set of exceptional curves is clarified.

SEU sensitivity of a CMOS SRAM increases with decreasing bias in such a manner that the critical charge exhibits a linear dependence on bias. This should allow proton and neutron monitoring of SEU parameters even for radiation hardened devices. The sensitivity of SEU rates to the thickness of the sensitive volume is demonstrated and procedures for determining the SEU parameters using protons are outlined.