Interstitial granulomatous dermatitis is a rare entity first described by Ackerman et al. in 1993. We described a 57-year-old female, with a long-standing history of rheumatoid arthritis, presenting with symmetric violaceous to erythematous indurated papules and nodules on her buttock and medial thighs arranging in an arciform fashion for more than three months. Pathologically, it showed palisa...

Over the past decade or so the evolution and equilibria of persistent decks of stratocumulus climatologically clinging to the edge of summertime subtropical highs have been an issue of increased scientific inquiry. The particular interest in the microphysical structure of these clouds stems from a variety of hypotheses which suggest that anthropogenic influences or biogenic feedbacks may alter ...

People chose different strategies for performing tasks, and that choice often plays a key role in performance. We investigate the use and evolution of strategic behavior in the Kanfer-Ackerman Air Traffic Controller c task, a fast-paced, dynamic task. We present strategies in two dimensions for one aspect of the task, examine how people use them and switch between them, and how their use relate...

An Ackerman steering linkage for short wheelbase, four-wheel vehicles has been developed. The linkage coordinates the steering angle of each wheel through a range of 180 degrees with minimal misalignment between wheels. Control of steering angles is accomplished using a single linear actuator. Control complexity is lower compared to four-wheel systems using individually controlled steering actu...

Michael J. Ackerman, MD, PhD1, Silvia G. Priori, MD, PhD2, Stephan Willems, MD, PhD3, Charles Berul, MD, FHRS, CCDS4, Ramon Brugada, MD, PhD5, Hugh Calkins, MD, FHRS, CCDS6, A. John Camm, MD, FHRS7, Patrick T. Ellinor, MD, PhD8, Michael Gollob, MD9, Robert Hamilton, MD, CCDS10, Ray E. Hershberger, MD11, Daniel P. Judge, MD6,12, Hervè Le Marec, MD13, William J. McKenna, MD14, Eric Schulze-Bahr, ...

For $n=2^k$, let $S$ be an $n x n$ matrix whose rows and columns are indexed by $GF(2)^k$ and, for $I,j \in GF(2)^k$, $S_{I,j}={I,j}$, the standard inner product. Size-depth trade-offs are investigated for computing $Sx$ with circuits using only linear operations. In particular, linear size circuits with depth bounded by the inverse of an Ackerman function are constructed, and it is shown that ...

Interstitial granulomatous dermatitis (IGD) with arthritis is a new histological entity first described by Ackerman et al in 1993 [1]. Herein we report a case of IGD with prominent neutrophilic infiltration. A 57-year-old man was referred to our clinic with persistent, systemic, pruritic erythema and papules of four years’ duration. Psoriasis vulgaris was diagnosed and the patient was treated w...

1. Kazakov DV, Burg G, Kempf W. Clinicopathological spectrum of mycosis fungoides. J Eur Acad Dermatol Venereol. 2004;18:397--415. 2. Nashan D, Faulhaber D, Ständer S, Luger TA, Stadler R. Mycosis fungoides: A dematological masquerader. Br J Dermatol. 2007;156:1--10. 3. Kodama K, Fink-Puches R, Massone C, Kerl H, Cerroni L. Papular mycosis fungoides: a new clinical variant of early mycosis fung...