L.S.test法が、実際時に生じるシワの測定にどれだけ一致するものであるかを、手のひらで握って肉眼判定をする手握法およびJIS法と比較し検討した。
本実験の範囲内では、L.S.test法は、開角度測定よりも折目高さの測定がやや手握法に近い順位を示す。
手握法とL.S.test法との相関性は、手握法とJIS法の相関性と差なく、L.S.test法は手握法よりもむしろJIS法に近いものである。
手握法とL.S.test法との順位差は、筋目状シワと波状シワ、小ジワと大ジワというシワの状態による差であり今後の課題にしたい。

抄録全体を表示

In order to express solidity we draw shade and shadow on a perspective drawing. But the vanishing point of - was often decided in an experimental way. Then we studied the method to draw shade and shadow according to angle of -. As the result of study, we found that not only the sun path diagram of any place but also the vanishing point of - could be drawn by simple geometrical operation.

抄録全体を表示

Our article reports a case of a 35-year-old man with cardiac mass, who underwent a wide range of imaging methods, including cardiac magnetic resonance imaging (MRI) and positron emission tomography/computed tomography (PET/CT). Contrast-enhanced MRI images revealed “ ” pattern in the mass. Final histopathological diagnosis of angiosarcoma was confirmed during autopsy. To our knowledge, our case is the second direct observation of this MRI diagnostic pattern and the first one that allows a comparison with PET/CT findings.

抄録全体を表示

地上をNo.0とし,上空1kmをNo.1,500m上昇することにNo.を一つづつ増し,38km上空をNo.75とする.この各高さに水平面を考え,この上面に当る第一次散乱光強度を計算した結果,次の四つの法則のあることが判明した.
1. 強度は太陽の高度に関係なく,各波長について高さが増すに従って減少する.
2. 強度は各高さ及び各波長につき,太陽高度が増すに従い増加する.
3. 強度が極大となる波長の値は各太陽高度につき,高さが増すに従い減少する.
4. 強度が極大となる波長の値は各高さにつき,太陽高度が増すに従い減少する.

抄録全体を表示

上空1kmをNo.1とし,500m上るごとにNo.を付け,38km上空をNo.75とする。各高さに原点をとり,太陽を通る垂直面と直角をなす面上において,この原点と地球中心を通る直線に対して角度θ₁をなす直線を引き,それが地球表面または大気上界と交る点をT₄としこれと原点T₀の間の線分T₀,T₄を4等分する点をT_l,T₂,T₃とし,以上の5点を一般にT_nで表わす。各原点が各θ₁において各T_nから受ける第1次散乱の波長別強度が極大となるようなT_nの位置は次の法則に従う。
1.各波長につき上空ほど,原点から遠くなる。
2.各高さにつき長波長ほど,原点から遠くなる。
3.各波長,各高さにつき,θ₁が大きくなるほど,原点に近づく。
4.太陽高度(h)大なるほど,原点から遠くなる。
要するに,“ほど”の字の前の変数以外の変数を一定にした場合につき上記の法則が成立するという意味である。ここに波長としては地球大気外の太陽の全波長放射エネルギーを12等分するような波長域の平均透過率に応ずる波長λ_i(i=1～12)を用い,また,θ₁の値としては,0°,30°,60°,65°,から5°おきに85°まで,(85+θ₁')/2,θ₁',(90°+θ₁')/2,90°から5°おきに115°まで,120°,150°,180°,ただし(85◊+θ₁')/2と(90°+θ₁')/2はNo.47まで,No.48以上はそのかわりに(80+θ₁')/2と87.5°を用いる。θ₁'は各高さから地球表面への切線のθ₁の値であり,No.47まではθ₁'>85°,No.48以上はθ₁'<85°.
θ₁=90°以上は,各高さ,各波長につき,極大のTnのnはゼロ,すなわち原点である。

抄録全体を表示

Wash and Wear性に関する研究の一つとして, その防しわ性の研究が多く行なわれているが, 今回英国リンネル工業研究会によって考案された新しいLinra -法を紹介するとともに, この-法により主として夏季使用されるテトロン混紡織物につき, その防しわ性を研究し, あわせて着心地という見地より発汗にともなう水分の吸湿性, 放湿性についても実験を行なった.

抄録全体を表示

The author computed the intensity of scattering at 5000m level in four wave-length ranges, and obtained the intensity distribution on the blue sky dome. Each of four partial solar radiation's energies contained in the wave-length ranges 0-0.5190 μ-0.7077 μ-1.0575 μ-∞ is equal to one fourth of the total energy and are denoted by I, II, III and IV.
Let h be the sun's altitude, A and θ the azimuth relative to the sun and the altitude of the portion of sky dome, respectively.
The intensity of first scattering increases with decreasing wave-length for each A and θ except for h=0 and θ=0, where the domain II has the greatest intensity from A=0 to A=120°, but III in A=150°, 180°.
For the altitude higher than h=30°, the intensity decreases with increasing θ for each range and A, for h=0 in domain I it is greatest at θ=30° and decreases to both sides from it, further in domains II, III and IV it decreases with increasing θ. The conditions of secondary scattering is the same with the primary for h_??_30°. In h=0, the intensity decreases with increasing θ in each range and A, and II has maximum for all A and θ.
The conditions of the total scattering are identical with the primary.
The intensity of total scattering for total wave-length range decreases with increasing θ for all h. The horizontal intensity due to total scattering increases with increasing altitude and decreasing wave-length, and therefore the value for total wave-length range increases with increasing altitude.
The horizontal intensity due to total radiation increases with increasing h for each range, and decreases with increasing wave-length for h=0, but it is inverted for h_??_30°.

抄録全体を表示

A case of Ewing's sarcoma of the mandible in a young child is presented. A 12-year-old boy was referred to our hospital because of swelling of the cheek, which he noticed 2 months previously. Clinical examination revealed diffuse swelling of the cheek, and a fistula of the gingiva. CT examination revealed a - apiculated image. MR showed a contract-enhancing lesion in the left mandibular angle. FDG-PET and Ga-scintigraphy revealed no metastasis. Based on the results of histopathological analysis, Ewing's sarcoma was diagnosed. The patient received combined chemotherapy, surgery, and radiotherapy. The patient has shown no evidence of recurrence or metastasis for 24 months.

抄録全体を表示

セダム属4種の挿し木, 葉播きへの気温 (月別), 照度条件 (相対照度100, 30, 10%) の影響について検討した。その結果, 挿し木後の不定根, 葉播き後の不定芽の形成は4種類共に12-2月の厳寒期, 酷暑期の照度100%下では困難であった。不定根の形成は100%, 30%では良好であり, マルバマンネングサ, メキシコマンネングサ, ルツマンネングサでは10月, タイトゴメでは4-5月の挿し木が最も優れた。葉播き後の不定芽の形成は光条件が大きく影響し4種類共に100%下では概ね困難であった。遮光下ではマルバマンネングサ, ツルマンネングサで活発に形成され, 他の種類の形成は僅かであった。また室内実験によって10-30℃ の範囲内では気温が高いほど早期に不定芽が形成された。

抄録全体を表示

Honeycomb solar air heating system is highly efficient as compared to conventional solar air heaters. Efficiency of solar air heating systems depends on high solar heat gain and higher heat transfer rate from the absorber plate to air. Honeycomb type absorbers are employed for high solar energy absorption rate. The air to be heated, passes through the honeycomb hole and sides of the honeycomb absorber. To maximize the absorption of solar thermal energy several dimensions and orientation of honeycomb are necessary to be considered. Maximizing the solar heat gain is also dependent on solar altitude angle and local coordinates. Optimization of honeycomb dimensions considering the solar angles, local coordinates, tilted surface radiation characteristics etc. has been discussed in this paper.

抄録全体を表示

A case of central hemangioma of the mandible in a 43-year-old man is presented in this paper. He was referred by his dentist to our hospital for the indication of a cystic lesion of his left mandible which was found accidentally during panoramic radiography.
Most cases of the central hemangioma statistically analysed revealed “ appearance” and “soap bubble effect”. But different from those cases, our case showed cystic lesion in X-P examinations and clinical findings.
It was operated as “bone cyst” in the clinical diagnosis but it was diagnosed as “central hemangionma” (“venous hemangioma”) in the pathology.

抄録全体を表示

Osteosarcoma of jaws does not always have characteristic clinical symptoms or X-ray findings. Moreover, the disease is sometimes difficult to diagnose histopathologically even based on biopsy specimens. Here, two cases of osteosarcoma of the mandible, which were difficult to diagnose definitely, are reported.
Case: A 38-year-old female complained of paresthesia of the mental region. Osteomyelitis was suspected on clinical examination. A biopsy was performed, but a definitive diagnosis could not be established. Subsequently, the swelling increased and the radiological examination showed a ‘-’ appearance. On histopathological re-examination, a diagnosis of osteosarcoma was established.
Case 2: A 38-year old male complained of paresthesia of the left lower lip and swelling of the buccal gingiva of the left lower premolar region. A biopsy was performed under a clinical diagnosis of a malignant tumor of the mandible. However, the histological diagnosis was an aneurysmal bone cyst. After total enucleation, a diagnosis of osteosarcoma was histopathologically established.

抄録全体を表示

We present both cases of osteosarcoma and fibrosarcoma occurred in the mandible. Cases 1 is osteosarcoma (osteoblastic type) occurred in 29-year-old man. Rotational panoramic radiogram showed an irregular radiolucency between the ramus and distal part of the left lower first premolar. At the first visit periosteal reaction which called - appearance was observed in the buccal cortical plates on occlusal view. After two months passed, this appearance changed to the other pattern which called Codman's triangle.
Case 2 is fibrosarcoma occurred in 17-year-old girl. This lesion demonstrated irregular radiolucency between the right second premolar and third molar with invasion to inferior border of the mandible and also bone expansion in the bucco-lingual site were observed radiographically. The dental radiograms taken eight months before showed rarefaction of the periapical region of the right second molar whose periodontalspace was widened symmetrically.
Sarcoma in the malignant tumor generally shows the rapid progress but some cases reveal slow growing. We think it is difficult to make the differential diagnosis between sarcoma and other tumors only by the osteolytic appearance on the radiogram.

抄録全体を表示