Showing papers by "Korea University published in 1970"

A case of lymphocytic interstitial pneumonitis

Abstract: Lymphocytic interstitial pneumonitis (LIP) is one of parenchymal pulmonary infiltrative diseases first described at 1966 by Carrington and Liebow. In LIP, there is a predominance of mature small lymphocytes in the interstitium of the lung which form germinal centers. The disease process surrounds, but dose not invade lung parenchyme, tracheobronchial tree and vascular structures. The etiology remains still unknown and the clinical features of this disorder have not been clearly defined. Therefore, the therapeutic modality is obscure. Development of LIP association with AIDS is often reported currently and possibility of progress to malignant lymphoma is emphasized. We experienced a case of primary LIP with pnemomediastinum. She was adimitted due to chest and anterior nuchal pain with chronic coughing, and diagnosed as pneumomediastinum with LIP. Medication with steroid was begun and some improvement of symptoms was observed, but an X-ray film of the chest remained same without improvement. We report above case with review of the literatures.

Some Combinatorial Problems and Results in Fractional Replication

Abstract: This chapter focuses on the combinatorial problems and results in fractional replication. It presents the matrix D that is composed of n + 1 row vectors of size 1 x n , with each vector containing from zero to n ones with all elements not one being zero. Every row of D is uniquely distinct and the total number of ones, T , in D is equal to n + k , k = 0, 1, n 2 — n . Here t equals the smallest number of ones in any row vector of the matrix and r equals the number of row vectors with t ones. When there are r row vectors with t ones, the remaining n + l − r row vectors should contain n + k − rt ones. If matrices are formed by starting with r row vectors with t ones in each and if n + 1 − r > n + k − rt , then no matrix exists because the number of row vectors left to choose is greater than the number of ones left to distribute.