ジャノヒゲ（広義）根茎の形態比較

We observed the underground organs in Ophiopogon japonicus（sensu lato）growing at the Kakuma hills, east of Kanazawa city. This species is a rhizomatous plant growing widely in Japan. Two types of rhizome were iden-tified : a vertical rhizome and an underground stolon. They are sometimes very similar in appearance and diffi-cult to identify. We found that the vertical rhizome had only foliage leaves and the underground stolon scale leaves. Thus the vertical rhizome and the underground stolon can be identified whether they have the remains of foliage leaves or not. The vertical rhizome and the underground stolon also differed in the growth pattern. These results lead to the conclusion that two types of plant grew side by side with each other at the Kakuma hills ; one has only the vertical rhizome and the other develops the underground stolon as well as the vertical rhizome

Epidermoid cyst of the testis: a case report

A 28-year-old man was admitted to our department with the chief complaint of a painless nodule in the left scrotal content. Physical examination revealed that a small, thumb-finger sized, hard mass with a smooth surface was palpable at the upper part of the left scrotal content. With the preoperative diagnosis of testicular tumor, the left testis was explored under ischemia. Appearance of the testis was normal and the mass was felt in the upper portion of the testis. Since the mass was suspected to be malignant, left radical orchiectomy was performed. The histological diagnosis was epidermoid cyst of the testis. Sixty-five cases of testicular epidermoid cyst including this case have been reported in the Japanese literature, and are reviewed briefly here

第二世代小型超音速飛行実験機の抗力特性評価

研究成果の概要 : 機体関

第一世代および第二世代小型超音速飛行実験機の操舵空力の評価

研究成果の概要 : 機体関

Aerodynamic Design, Characterization, and Flight Capability Prediction of the Small-scale Supersonic Flight Experiment Vehicle “Oowashi”

Innovation in technologies for high-speed atmospheric flights is essential for establishment of both supersonic/hypersonic and reusable space transportations. It is quite effective to verify such technologies through small-scale flight tests in practical high-speed environments, prior to installation to large-scale vehicles. Thus we are developing a small-scale supersonic flight experiment vehicle as a flying test bed. Two generations of aerodynamic configuration with a cranked-arrow main wing are proposed. Their aerodynamics are analyzed intensively through wind tunnel tests and are found to be favorable. On the basis of the aerodynamic characterization and propulsion design analysis, it is predicted that some thrust enhancement and/or drag reduction in the transonic regime are required for realization of supersonic flights up to Mach 2. For this end, aerodynamic configuration modification based on the area rule is being applied. Prior to the construction of the supersonic vehicles, a full scale prototype vehicle and subscale vehicles are designed and fabricated in order to verify the subsonic flying characteristics through flight tests. Preliminary flight tests of the 1st-generation prototype vehicle are carried out and good flight capability in subsonic regime is demonstrated. In addition, a subscale vehicle is being fabricated in house for cost-effective and repeated preliminary flight tests.特集 : 航空宇宙機システム研究センターにおける開発研究2 : 3. オオワシII飛行にむけて並びに関連技術の研究開発（機体、構造系