イミ ノ スウガク モデル ニヨル コウソク レンソウ ケンサク ホウシキ ト マルチメディア データベース エノ オウヨウ

データベース･システムにおける情報検索，および，知識発見のための主要な基本操作は連想検索である。ここで，連想検索とは，あるキーワードに関連する検索をそのキーワードが表すアドレスではなく，そのキーワードの内容に応じて検索することをいう[19, 26]。現行のデータベース･システムにおける連想検索は,パターン･マッチングによる検索であり，異なる表現形態であるが同一の意味をもつデータや近い意味をもつデータの検索を行うことはできない[18]。 ･･･筑波大学博士 (工学) 学位論文・平成12年3月24日授与 (乙第1621号)標題紙、目次 -- 第１章　はじめに -- 第２章　意味の数学モデル -- 第３章　意味の数学モデルによる高速連想検索アルゴリズム -- 第４章　意味の数学モデルのマルチデータベースシステムへの応用 -- 第５章　意味の数学モデルによる実時間並列マルチメディアデータ検索 -- 第６章　基本システム設計と実装 -- 第７章　おわりに -- 謝辞 -- 参考文献 -- 付録・論文リス

Decreasing the Pressure Gradient of the Left Ventricular Outflow Tract by Single-lead VDD Pacing in a Patient with Hypertrophic Obstructive Cardiomyopathy

A 59-year-old woman with hypertrophic cardiomyopathy of 8 years duration, who had been taking ﾎｲ-blocker, was admitted to our hospital for exertional dyspnea and previous syncope. Cardiac catheterization showed a prominent left-ventricular outflow tract (LVOT) pressure gradient, and hypertrophic obstructive cardiomyopathy (HOCM) was diagnosed. To reduce LVOT obstruction, we implanted a single-lead VDD-mode pacemaker. Cardiac catheterization after the implantation revealed a remarkable decrease in the LVOT pressure gradient with short atrioventricular delay, 80 msec, and her symptoms disappeared. A singlelead VDD pacemaker is also a useful treatment for an HOCM patient due to the relative ease with which it can be implanted

Urinary Protein-to-creatinine Ratios Predict Recurrence in Pediatric and Young Adult Cases of Minimal Change Nephrotic Syndrome

High-dose steroids are required for the treatment of minimal change nephrotic syndrome (MCNS), especially for episodes of recurrence. Predicting and avoiding recurrence can help reduce the steroid dose, but prediction is currently difficult. We herein examined whether changes in laboratory data, especially the urinary protein- to-creatinine ratio (UTP/UCr), can predict clinical recurrence. We also assessed differences in clinical features between children and young adults. We included 36 patients with MCNS; for each case, we retrospectively studied laboratory data during stable remission and pre-recurrence, with the “stable” period defined as all but the 6 weeks before recurrence, and pre-recurrence defined as the 4±2 weeks before recurrence. UTP/UCr, serum albumin, etc. were measured every 5 years during stable periods. We divided patients into cohorts by age at recurrence, < 15 years and ≥ 15 years, and compared stable and pre-recurrence values for the two groups. UTP/UCr values during stable periods tended to be higher in younger patients. UTP/UCr and serum albumin showed statistically significant changes during pre-recurrence periods, but only in those aged ≥ 15 years. Thus, clinical features of recurrence differed depending on age. Signs of recurrence can be confirmed via UTP/UCr or serum albumin several weeks before recurrence in patients ≥ 15 years