The prevalence of homozygous and heterozygous deficiency of the second component of complement (C2) was determined in patients with rheumatic disease including 137 with systemic lupus erythematosus (SLE), 274 with juvenile rheumatoid arthritis, and 134 with rheumatoid arthritis. 1 C2 homozygous deficient and 19 possible heterozygous deficient individuals were identified by using both immunochem...

Dear Editor, Clear cell papulosis (CCP) is a rare dermatosis seen predominantly in infants of Asian background. It presents with hypopigmented and minimally palpable, flat-topped papules, sited over the lower abdominal or pubic regions, or along the milk lines. We present a series of 3 local patients with CCP, highlighting their clinicopathologic characteristics and review the existing literatu...

It is proved that each group of order 32 that has a maximal subgroup isomorphic to C2×C2×C2×C2 or C4×C4 is determined by its endomorphism semigroup in the class of all groups.

This paper presents the Dynamic OODA loop, or DOODA loop for short, a generic model of Command and Control (C2) stemming from Boyd’s OODA loop and cybernetic models of C2. The DOODA loop is formulated in terms of functions that must be accomplished for effective C2, and these functions are then studied in terms of (partially overlapping) processes. The DOODA loop preserves the prescriptive rich...